IM- PROVEMENTS IN SEWING MACHINERY
Year: 1876

page_text: LETTERS PATENT to William Robert Lake, of the Firm of Haseltine, Lake, & Co.,
Patent Agents, Southampton Buildings, London, for the Invention of "IM-
PROVEMENTS IN SEWING MACHINERY." A communication from abroad by
Jesse Folk, of Brooklyn, New York, United States of America, Gentleman.
Sealed the 27th February 1877, and dated the 25th September 1870,
PROVISIONAL SPECIFICATION left by the said William Robert Lake at
the Office of the Commissioners of Patents on the 25th September 1876.
WILLIAM ROBERT LAKE, of the Firm of Haseltine, Lake, & Co., Patent Agents,
Southampton Buildings, London. "IMPROVEMENTS IN SEWING MACHINERY."
A communication.
The first part of this Invention comprises a novel combination with the shafts
operating the stitch forming mechanism of a supplemental shaft intervening
between those first above named, and connected therewith by links in such a
manner that the motion of one of the operating shafts aforesaid is transmitted
through the links, and the intervening shaft to the other of the aforesaid operating
shafts, so that positive uniform and comparatively frictionless transmission of rotary
motion from one operating shaft to the other is secured.
Also the combination with the sewing machine of a driving pulley having its
periphery constructed with alternating spurs and spaces, the spurs having a
Vshaped or semicircular groove for the reception of the driving belt, whereby the
most efficient and reliable transmission of power to the driving shaft of the machine
by means of a suitable belt is provided for.
Also the combination with one or both of the shafts operating the stitch forming
mechanism of a peculiarly constructed differential device, whereby said shafts are
caused to revolve with varying velocities at different portions of their revolutions
in order that the devices actuated thereby may move at proper speed and in
suitable relation with each other in the formation of the stitch.
Also a novel combination with the needle bar and crank of the needle operating
shaft of an angular lever, link, and moveable bearing, whereby a differential move-
ment is given to the needle bar, so that the vertical motion of the needle may vary
at different portions of its stroke in order to act in the most effective unison with
the other portions of the stitch forming mechanisın.

page_text: It further comprises a sewing machine, a needle, solid at its point but split or
divided through its main length and formed with a loop above its eye, whereby
without weakening the needles provision is made for the threading of said needle
with far greater convenience and facility than has hitherto been possible.
Also a rotary hook constructed with a bridge arranged between the nose and the
heel of the hook, whereby the catching of the needle loop upon the heel of the hook
when the loop is being taken up is effectually guarded against.
Also a rotary hook constructed with a projection arranged to yield in a plane
parallel with the axis of the hook, whereby provision is made against the drawing
upward of the bobbin bodily, and at the same time increased facility for the drawing
upward of the loop therefrom is secured.
Also a rotary hook constructed with a circumferential flange at its rear or inner
side, whereby the needle thread in passing around the hook is prevented from
slipping behind the same.
Also a bobbin of novel construction, the same being made of a single piece of
metal, whereby more perfect shape and finish, and consequently more efficient
operation of the bobbin in the working of the machine is secured.
Also a bobbin having its peripherical thread outlet or opening at one side of a
central plane, whereby without danger of the bobbin thread slipping into the
opening of the bobbin the bobbin seat of the hook may be made much shallower
than has hitherto been practicable, thereby making a less acute turn for the thread
as it passes upward from the bobbin facilitating its upward passage and lessening
its wear and abrasion.
The said Invention further comprises in a sewing machine a novel combination
of an adjustable shaft carrying the bobbin retainer with a socket or bearing and
with the bobbin, the several parts being constructed and arranged in such manner
that the bobbin retainer may be adjusted to any required retaining pressure upon
the bobbin, and may also be readily brought away therefrom when the removal of
the bobbin from the book is required, needing no other horizontal or vertical
adjustment when moved, as is the case with the ordinary ring slide.
Also the combination with the rotary hook and bobbin of a sewing machine of a
bobbin retainer arranged to rotate in the same direction as the hook, whereby an
increased friction is exerted upon the bobbin in a direction opposite to the strain
exerted thereon by the bobbin thread, thereby causing an increased and desirable
tension upon the said thread.
Also in combination with the rotary hook of a sewing machine a brush arranged to
rotate in the same direction as the hook but at a greater velocity, whereby at the
proper point in the revolution of the hook the needle thread is swept therefrom
more quickly than could be done by simple strain upon the thread.
The said Invention further comprises in a sewing machine the combination of a
secondary shaft and pulley, with a pulley arranged on the shaft of the revolving
bobbin retainer and a suitable connecting belt, whereby provision is made for the
rotation of said bobbin retainer either alone or with the rotating brush attached
thereto in suitable unison with the movement of the rotating hook.
The Invention also comprises a tension device composed of two independently
moving rods or stems arranged to act in succession on suitable gripping plates to
prolong the operation of the tension on the thread.
Also two gripping plates adjustable with reference to each other in combination
with an actuating rod or stem arranged to close and open the said plates to grip
and release the thread, whereby the tension device is made readily adjustable to
different thicknesses of thread and adapted for the sewing of goods of various kinds.
Also a cloth plate having its needle throat made straight from end to end at its
front side, whereby the pull of the thread upon the fabric in passing through it is
kept in a plane coincident with that of the desired movement of the cloth in
order to prevent the drawing of the cloth sideways during the formation of
the seam.
The said Invention further comprises a cloth plate Laving an antifriction wheel

page_text: arranged at the end of its needle throat, and in euch relation therewith as to
receive the contact of the thread and prevent its abrasion and lessen the friction
thereof during the drawing of the thread through the needle throat.
Also in a sewing machine a four motion feed positive in all its motions and
adjustable in its longitudinal throw, whereby greater certainty in the operation of
the feed is secured together with adjustablity for varying the stitch to any requisite
length.
Also a four motion feed positive in all its motions and adjustable in its vertical
throw, whereby is combined the advantages of certainty of motion with those
arising from perfect adaptability to the sewing of goods of various thicknesses.
Also a feed supported at both ends and swinging upon pivoted links or arms,
whereby a perfectly positive movement is given to the feed without the friction
incident to the movement of the feed in guides.
The said Invention further comprises in combination with the swinging feed of
the sewing machine, a rod and link so combined with the said feed as to provide
for the ready and convenient adjustment of the longitudinal throw of the said feed.
It further comprises a novel combination with the swinging feed of a lever and
devices connecting the same with said swinging feed, whereby provision is made for
adjusting the vertical throw of the feed.
Also an adjustable feed so combined with a single excentric as to simultaneously
receive therefrom both its horizontal and vertical movement, thereby economizing
space, simplifying the construction of the feed mechanism, and diminishing the
liability of its derangement by use.
It further comprises in combination with the positively actuated four motion
feed and the excentric giving motion thereto of two excentric straps, one within
the other arranged to be simultaneously actuated by the excentric in giving the
vertical and longitudinal movements to the feed, whereby is avoided the friction
that would be experienced were both the straps brought in contact with the moving
surface of the excentric.
Also in the feed of the sewing machine a novel combination of an adjustable rod
connected to the feed by a link with the excentric actuating the said lever through
a suitable connecting strap, whereby an adjustable longitudinal throw is given to
the feed.
It further comprises a novel combination of an adjustable lever arranged to
actuate the feed through an intermediate rod with the strap, by which movement is
given from the excentric to the said lever, whereby an adjustable vertical throw is
given to the feed.
Also a take-up constructed with and actuated by an adjustable crank pin
arranged in such relation with the take-up mechanism, that said mechanism can be
made to act upon the thread at any desired point in the stroke of the needle.
Also a revolving take-up constructed and arranged to take up and slacken the
thread without abrupt strain on the thread while finishing the stitch in the cloth.
Also a revolving take-up made differential in its motion and arranged in such
relation with the stitch forming mechanism as to most advantageously act upon the
thread in unison with the movements of said mechanism.
The said Invention further comprises the combination in the revolving take-up
of the sewing machine of a supplemental plate wheel, whereby the thread is
prevented from slipping from the take-up during the rotation thereof.
Also an antifriction wheel, whereby the take-up is prevented from exerting undue
wear upon the thread.
Also the combination with the presser bar of a rock shaft having at one end a
can arranged to lift the said presser bar, and at the opposite end a lever for
turning the said rock shaft, and a spring acting upon the rock shaft to retain the
same in either position to which it may be turned, whereby a simple and convenient
means of lifting and lowering the presser foot is provided.
The second part of this Invention comprises the combination of a crank pin on
the needle actuating shaft, a fulcrumed connecting rod and a universal joint con-

page_text: necting said fulcrumed rod with the bar or shaft arranged to give motion to the
thread hook in unison with the needle, whereby such unison of movement is
provided without the usual bearings, gears, belts, and the like; a smooth positive
and comparatively frictionless transmission of motion being thereby provided for.
Also a thread hook provided upon the end of a lever working on a ball joint and
arranged to carry the needle thread around the bobbin in the formation of the
stitch without itself turning on its own axis, whereby the friction of the parts and
the wear upon the thread incident to the use of the usual rotating hook and
bobbin is entirely obviated, and the twisting of the thread ordinarily experienced is
avoided.
Also a bobbin arranged in a fixed shell or receiver in combination with a thread
hook arranged to have a circular motion around said bobbin without rotating on
its own axis, whereby provision is made for the carrying of the needle thread
around the bobbin, and for its certain and rapid release at the moment required for
the completion of the stitch.
It further comprises a novel combination of a vertically grooved fixed plate, the
bobbin and the thread hook arranged to move around the bobbin without turning
on its own axis, whereby provision is made for the certain passage of the thread
hook into the loop of the needle thread without liability of the displacement of the
bobbin or the consequent breaking of the needle.
Also the combination with the feed of an actuating rod working on a ball joint,
and itself connected by a universal joint with the bar or shaft carrying the thread
hook, the latter being also arranged to work on a ball joint, whereby without
appreciable friction the requisite movement is given to the feed in unison with the
movement of the thread hook.
Also a novel combination with the needle shaft of a pivoted slotted arm or lever,
and a crank on the adjacent end of the needle actuating shaft, whereby pro-
vision is made for the requisite differential movement of the needle bar in unison
with the other parts of the stitch forming mechanism, and a novel combination of a
take-up eye on the aforesaid slotted arm with a fixed eye, in such manner as to
provide a simple and efficient take-up mechanism acting in perfect harmony with
the movement of the needle and other parts of the stitch forming mechanism.
The third part of this Invention comprises a novel combination of a hook with a
bobbin and an independent bobbin frame, whereby the construction of the hook
itself is materially simplified, and whereby the hook is enabled to rotate inde-
pendently of the bobbin.
Also the combination with the bobbin, of a hook of peculiar construction, whereby
the back of the needle loop is carried behind the bobbin, and the front of the-said
loop in front of the bobbin throughout an entire revolution of the hook, in such
manner as to form such loop complete without twisting the thread, and without the
help of the usual cast off; and a novel combination of a fixed guide with the bobbin
and the look, whereby the slipping of the needle loop from the bobbin during the
formation thereof, as just described, is prevented.
The fourth part of this Invention comprises a loaded plunger so combined with
the bobbin of a rotary sewing machine hook as to press the bobbin forward or
outward, and provide an appreciable space for the passage of the needle thread
behind the bobbin, whereby the friction and wear ordinarily exerted upon the said
thread by binding between the bobbin and its seat or socket is entirely obviated.
Also a bobbin clamp fixed to the rotary hook and carried around with the same,
whereby the ordinary ring slide is dispensed with, and the friction exerted by said
ring slide upon the bobbin is avoided."
Also a novel combination of a spring and pivot with the aforesaid bobbin clamp,
hook, and bobbin, whereby provision is made for the convenient removal and
replacement of the bobbin when required.
The said Invention further comprises in a rotary sewing machine hook a bobbin
shell constructed with an eccentrically movable stud in combination with a bobbin
formed with a groove in its internal periphery, whereby the axial attachment of

page_text: the bobbin within the shell and its consequent free but secure retention therein is
provided for.
Also a bobbin constructed with a central thread delivery, whereby the bobbin
thread is always kept at the same distance from the cloth, and consequently an
equal or uniform tension is secured to the bobbin thread throughout the formation
of the stitch.
Also a rotating sewing machine hook constructed with a rebate at its rear or
inner periphery, whereby room is afforded for a "feed" of any suitable kind at the
same time that the hook itself may be brought close to the cloth plate of the machine
to diminish to the utmost possible degree the length of thread required to be drawn
through the cloth in the formation of the stitch, and whereby the feed may be
brought nearer to the front of the hook to co-operate therewith in the formation of
the stitch.
The fifth part of the said Invention comprises a novel combination of a rock shaft
and crank arm connected by a link above the axis of the rock shaft with the needle
bar, the several parts being arranged to operate in such relation with the rotary
hook that the needle is lifted up and clear of the hook during the greater portion of
the revolution thereof, but caused to rapidly descend into the requisite relation
therewith as the nose of the hook approaches to pass through the needle loop in the
formation of the stitch, and to ensure the rapid raising of the needle out of the way
of the further revolution of the hook as soon as said nose has passed into and
through the needle loop.
It further comprises a novel combination with the rotary shaft carrying the hook,
and the rock shaft having its crank arm connected by the link with the needle bar,
as herein-before explained, of a crank on the rotary hook shaft, a secondary crank
arm on the rock shaft, and a connecting rod between the crank and the last
mentioned crank arm, whereby the rotary hook and the needle bar are caused to
move and operate in the requisite union with each other.
Also in a rotary hook sewing machine, a fixed plate or shoulder arranged in such
relation with the needle and the hook as to prevent the backward movement of the
loop, and thereby provide against skipping of stitches.
Also a rotary hook circularly recessed or chambered in its rear side in combi-
nation with the fixed plate or shoulder, whereby provision is made for bringing the
fixed plate or shoulder sufficiently close to the nose of the hook without impairing
the efficiency of the latter by cutting away its periphery.
The sixth part of this Invention comprises a novel combination of a rotary crank
wrist with two oscillating crank wrists, the one connected with a rotary wrist by a
suitable link, and the other with the needle bar by a connecting rod or pitman,
whereby a lost motion is produced when the needle bar is depressed to or near the
limit of its downward movement, thereby insuring the retention of the needle and
needle loop in their depressed position during the length of time requisite in the
proper passage of the shuttle through the needle loop, the same combination when
reversed in position being adapted for use with a rotary hook.
Also a take-up arranged upon the pitman, and in such relation with a suitablo
eyelet as to provide a simple and effective means for taking up the needle thread at
the requisite stage in the formation of the stitch.
It further comprises a novel combination of needle and shuttle, whereby two
descents of the needle to one complete or full motion of the shuttle is secured,
thereby doubling the number of stitches produced from any given number of move-
ments of the shuttle.
It further comprises in a shuttle machine a double ended shuttle, that is to say, a
shuttle having a nose so termed at each end, whereby the shuttle is enabled to pass
through the needle loop when moved in either direction.
Also a shuttle actuating rod constructed with an elastic joint or coupling in com-
bination with an operating crank and with the raceway of the shuttle, whereby the
shuttle is caused to remain stationary during a definite or appreciable length of
time at the end of its stroke in order to permit the requisite succeeding movements

page_text: of the needle, the actuating crank meanwhile being permitted to rotate by the
yielding of the joint or coupling while the shuttle is thus at rest, thereby insuring
the requisite movement and operation of the shuttle without interrupting the con-
tinuous rotation of the shaft actuating the same.
Also a novel combination with a four motion feed of an operating shaft working
on a ball joint, whereby a definite, noiseless, and comparatively frictionless four
motion movement is given to the said feed.
It further comprises a novel combination of the aforesaid actuating shaft working
on a ball joint with a feed free at one end, and suspended at the other from a
swinging stirrup, whereby an extremely simple construction of the feed and its
adjuncts is secured, and perfect freedom given to the same in its operation.
Also a novel combination with the actuating shaft working on a ball joint, and
arranged to operate the feed of an eccentrically socketted shaft receiving the end of
the actuating shaft aforesaid, and provided and operated to give the required move-
ment to said actuating shaft.
It further comprises in combination with the actuating shaft operating the four
motion feed, of a ball joint adjustable along its entire length, whereby the throw of
said feed may be adjusted at will; and a novel combination with the shaft trans-
mitting motion in unison with the needle bar and the shuttle, of peculiarly con-
structed universal joints whereby the use of toothed gearing in the transmission of
such motion may be to a certain extent avoided.
The seventh part of this Invention relates to that class of sewing machines in
which a rotating shuttle, in other words a shuttle travelling in a circular or
elliptical path is employed, and comprises in a sewing machine of this variety a
revolving shuttle arranged to move horizontally instead of in a vertical plane,
thereby obviating the drawbacks incident to the construction last indicated.
It further comprises the combination of the rotating shuttle, a horizontal raceway,
and a rotating disc or its equivalent giving the requisite circular motion to the shuttle
in due relation with the needle, whereby more uniformity of friction and conse-
quently reliability of motion is secured in the movement of the shuttle than is
possible with one moving in a raceway arranged in a vertical plane.
Also the combination with the rotating disc or its equivalent by which circular
motion is given to the shuttle of a central catch or stud, around which the shuttle
thread is caught and looped during a portion of the revolution of the shuttle, and at
the requisite part of such revolution released to provide the slack required in the
formation of the stitch, said catch or stud also providing for the take-up of such
slack when the thread is to be tightened in the completion of the stitch.
Also the construction of the aforesaid stud with a sloping surface, whereby at the
requisite point in the revolution of the shuttle the quick release of the shuttle
thread therefrom is greatly facilitated.
The said Invention further comprises a novel combination with a vertical shaft
giving motion to the shuttle moving in a horizontal raceway, and with the hori-
zontal driving shaft of the machine, of an intermediate link connected with the
two shafts aforesaid by universal joints, whereby a positive rotary movement is
given to the disc or its equivalent employed in communicating the circular move-
ment to the shuttle without the friction, back lash, and occasional lost motion
incident to the use of gearing.
Also a novel combination of a rock shaft having a crank arm connected by a link
with the needle bar, the link being arranged below the axis of motion of the rock
shaft, and the several parts being arranged to depress the needle for the time and in
the manner required for the facial passage of the shuttle through the needle loop
without danger of straining the thread upon the shuttle and retarding the passage
thereof.
It further comprises a horizontal circular raceway constructed with a vertical
groove receiving the needle as the same descends into the requisite relation with
the rotating shuttle traversing the said raceway, whereby the needle loop is thrown
forward and opened to insure the passage of the shuttle through the needle loop,

page_text: and to enable the shuttle to pass in close proximity to the needle as required in
such transit of the shuttles through said loop.
Also the novel combination of a crank on the driving shaft, an oscillating arm on
the rear of the rock shaft giving motion to the needle bar and an intermediate con-
necting rod, whereby the requisite rocking movement is given to the said rock shaft
from and during the continuous rotation of the driving shaft.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by the
said William Robert Lake in the Great Seal Patent Office on the 24th March
1877.
WILLIAM ROBERT LAKE, of the Firm of Haseltine, Lake, & Co., Patent Agents,
Southampton Buildings, London. "IMPROVEMENTS IN SEWING MACHINERY."
A communication from abroad by Jesse Folk, of Brooklyn, New York, United States
of America, Gentleman.
The first part of this Invention comprises a novel combination with the shafts
operating the stitch forming mechanism of a supplemental shaft intervening between
those first above named, and connected therewith by links in such manner that the
motion of one of the operating shafts aforesaid is transmitted through the links and
the intervening shaft to the other of the aforesaid operating shafts, so that positive,
uniform, and comparatively frictionless transmission of rotary motion from one
operating shaft to the other is secured.
Also, the combination with the sewing machine of a driving pulley having its
periphery constructed with alternating spurs and spaces, the spurs having a V shaped
or semicircular groove for the reception of the driving belt, whereby the most efficient
and reliable transmission of power to the driving shaft of the machine by means of
a suitable belt is provided for.
Also, the combination with one or both of the shafts operating the stitch forming
mechanism of a peculiarly constructed differential device, whereby said shafts are
caused to revolve with varying velocities at different portions of their revolutions
in order that the devices actuated thereby may move at proper speed and in suitable
relation with each other in the formation of the stitch.
Also, a novel combination with the needle bar and crank of the needle operating
shaft of an angular lever link and moveable bearing, whereby a differential move-
ment is given to the needle bar, so that the vertical motion of the needle may vary
at different portions of its stroke in order to act in the most effective unison with
the other portions of the stitch forming mechanism.
It further comprises, in a sewing machine, a needle solid at its point, but split or
divided through its main length, and formed with a loop above its eye, whereby,
without weakening the needle, provision is inade for the threading of said needle
with far greater convenience and facility than has hitherto been possible.
Also, in a rotary hook constructed with a bridge arranged between the nose and
the heel of the hook, whereby the catching of the needle loop upon the heel of the
hook when the loop is being taken up is effectually guarded against
Also, a rotary hook constructed with a projection arranged to yield in a plane
parallel with the axis of the hook, whereby provision is made against the drawing
upward of the bobbin bodily, and at the same time increased facility for the drawing
upward of the loop therefrom is secured.
Also, a rotary hook constructed with a circumferential flange at its rear or inner
side, whereby the needle thread in passing around the hook is prevented from
slipping behind the same.
Also, a bobbin of novel construction, the same being made of a single piece of
metal, whereby more perfect shape and finish, and consequently more efficient opera-
tion of the bobbin in the working of the machine is secured.

page_text: Also, a bobbin having its peripherical thread outlet or opening at one side of a
central plane, whereby, without danger of the bobbin thread slipping into the
opening of the bobbin, the bobbin seat of the hook may be made much shallower
than has hitherto been practicable, thereby making a less acute turn for the thread
as it passes upward from the bobbin, faciliting its upward passage, and lessening
its wear and abrasion.
The said Invention further comprises, in a sewing machine, a novel combination
of an adjustable shaft carrying the bobbin retainer with a socket or bearing and
with the bobbin, the several parts being constructed and arranged in such manner
that the bobbin retainer may be adjusted to any required retaining pressure upon
the bobbin, and may also be readily brought away therefrom when the removal of
the bobbin from the hook is required, needing no other horizontal or vertical adjust-
ment when moved, as is the case with the ordinary ring slide.
Also, the combination with the rotary hook and bobbin of a sewing machine of a
bobbin retainer arranged to rotate in the same direction as the hook, whereby an
increased friction is exerted upon the bobbin in a direction opposite to the strain
exerted thereon by the bobbin thread, thereby causing an increased and desirable
tension upon the said thread.
Also, in combination with the rotary hook of a sewing machine a brush arranged
to rotate in the same direction as the hook, but at a greater velocity, whereby at
the proper point in the revolution of the hook the needle thread is swept therefrom
more quickly than could be done by simple strain upon the thread.
The said Invention further comprises in a sewing machine the combination of a
secondary shaft and pulley with a pulley arranged on the shaft of the revolving
bobbin retainer and a suitable connecting belt, whereby provision is made for the
rotation of said bobbin retainer either alone or with the rotating brush attached
thereto in suitable unison with the movement of the rotating hook.
Also, a tension device composed of two independently moving rods or stems
arranged to act in succession on suitable gripping plates to prolong the operation of
the tension on the thread.
Also, two gripping plates adjustable with reference to each other in combination
with an actuating rod or stem arranged to close and open the said plates to grip
and release the thread, whereby the tension device is more readily adjustable to
different thicknesses of thread, and adapted for the sewing of goods of various
kinds.
Also, a cloth plate having its needle throat made straight from end to end at its
front side, whereby the pull of the thread upon the fabric in passing through it is
kept in a plane coincident with that of the desired movement of the cloth in order
to prevent the drawing of the cloth sideways during the formation of the seam.
The said Invention further comprises a cloth plate having an antifriction wheel
arranged at the end of its needle throat, and in such relation therewith as to receive
the contact of the thread and prevent its abrasion, and lessen the friction thereof
during the drawing of the thread through the needle throat.
Also, in a sewing machine a four-motion feed, positive in all its motions and
adjustable in its longitudinal throw, whereby greater certainty in the operation of
the feed is secured, together with adjustability for varying the stitch to any
requisite length.
Also, a four-motion feed, positive in all its motions and adjustable in its vertical
throw, whereby is combined the advantages of certainty of motion with those arising
from perfect adaptability to the sowing of goods of various thicknesses.
Also, a feed supported at both ends and swinging upon pivoted links or arms,
whereby a perfectly positive movement is given to the feed without the friction
incident to the movement of the feed in guides.
The said Invention further comprises in combination with the swinging feed of
the sewing machine a rod and link so combined with the said feed as to provide for
the ready and convenient adjustment of the longitudinal throw of the said feed.
It further comprises a novel combination with the swinging feed of a lever and

page_text: +
devices connecting the same with said swinging feed, whereby provision is made for.
adjusting the vertical throw of the feed.
Also, an adjustable feed so combined with a single excentric as to simultaneously
receive therefrom both its horizontal and vertical movement, thereby economizing
space, simplifying the construction of the feed mechanism, and diminishing the
liability of its derangement by use.
It further comprises in combination with the positively actuated four-motion feed
and the excontric giving motion thereto, of two excentric straps concentric and one
within the other, arranged to be simultaneously actuated by the excentric in giving
the vertical and longitudinal movements to the feed, whereby is avoided the friction
that would be experienced were both the straps brought in contact with the moving
surface of the excentric.
Also, in the feed of the sewing machine a novel combination of an adjustable rod
connected to the feed by a link with the excentric actuating the same lever
through a suitable connecting strap, whereby an adjustable longitudinal throw is
given to the feed.
It further comprises a novel combination of an adjustable lever arranged to
actuate the feed through an intermediate rod with the strap by which movement is
given from the excentric to the said lever, whereby an adjustable vertical throw is
given to the feed.
Also, a take-up constructed with and actuated by an adjustable crank pin arranged
in such relation with the take-up mechanism that said mechanism can be made to
act upon the thread at any desired point in the stroke of the needle.
Also, a revolving take-up constructed and arranged to take up and slacken
the thread without abrupt strain on the thread while finishing the stitch in the
cloth.
Also, a revolving take-up made differential in its motion, and arranged in such
relation with the stitch forming mechanism as to most advantageously act upon the
thread in unison with the movements of said mechanism.
The said Invention further comprises the combination in the revolving take-up of
the sewing machine of a supplemental plate wheel, whereby the thread is prevented
from shifting from the take-up during the rotation thereof.
Also, an antifriction wheel, whereby the take-up is prevented from exerting
undue wear upon the thread.
Also, the combination with the presser bar of a rock shaft having at one end a
cam arranged to lift the said presser bar, and at the opposite end a lever for turning
the said rock shaft, and a spring acting upon the rock shaft to retain the same in
either position to which it may be turned, whereby a simple and convenient means
of lifting and lowering the presser foot is provided.
In the accompanying Drawings,
Figure 1 is a side view and partial vertical section of a sewing machine made
according to my Invention; Figure 2 is a view shewing one portion thereof
detached; Figure 3 is a longitudinal section of another part detached.
Figures 2a and 2b are detached portions of the particular feature represented in
Figure 2.
Figure 4 is a face view of the hook; Figures 5 and 6 are edge view of the same.
Figure 7 is another side view of the hook and needle.
Figure 8 is a front view and partial vertical transverse section of
my machine.
Figure 9 is a detail view of a part of the take-up mechanism of this machine.
Figure 10 is a transverse sectional view of the bobbin in process of formation.
Figure 11 is a like view of the bobbin when complete.
Figures 12, 13, and 14 represent the needle forming part of my Invention.
Figure 15 is a vertical transverse sectional view representing the feed actuating
devices.
Figure 16 is a front view of the said machine.
Figure 17 is a side view taken from the side opposite Figure 1.
Figures 17, 17, 18, 19, 20, and 21 are detail views of certain of the parts.

page_text: Figure 22 is a vertical transverse section representing the tension device embraced
in the machine.
Figures 23, 24, 25, 26, 27, 28, 31, 32, and 33 represent the rotating hook
and its adjuncts in the various positions occupied at different stages of the
formation of the stitch, and also the various essential features of said hook.
Figures 29 and 30 represent the cloth plate and the top of the feed.
Having reference first to Figures 1 and 17,-
A is the shaft which actuates the needle bar B, and C is the shaft which actuates
the rotating hook, all as herein-after explained; D is an intermediate shaft
arranged vertically in suitable bearings and in position at right angles to the shafts
A, C. The rear ends of the shafts A, C, are forked, and have pivoted in them
rocking blocks a, c. In like manner the ends of the shaft D are forked, and have
pivoted in them other rocking blocks a*, d; between the ends of the shaft D and the
adjacent ends of the shafts A, C, are placed links A', C¹, which are forked at both
ends, and have in such forked ends pivots a¹, c', which bear into the sides of the
blocks in directions at right angles to the pivots by which said blocks are attached
in place in the ends of the shafts A, C, D. By this construction the links A¹, C¹,
are connected with the shafts A and C and the intermediate shaft D by universal
joints, so that the rotation of the one shaft, for example the shaft C, is transmitted
through the links and the intermediate shaft D to the other shaft A, this motion
being continuous and uniform at all portions of its revolution, evenly balanced and
positive, forming a smooth, easy running, noiseless and non-slipping mechanism for
the transmission of power and motion from the one shaft to the other, thereby.
ensuring the requisite positive relationship in the motion and operation of the
stitch forming mechanism embracing the rotating hook and its adjuncts, and that
constituted by the needle, feed, and the like. Upon the shaft C is provided the
pulley C² of peculiar construction, the same having its periphery formed of alterna-
ting spurs or teeth c³, but at an angle in opposite directions, so that a V shaped
groove is formed on the periphery of the wheel, each side of said groove being
formed with the spurs alternating with spaces between, this providing a firm grip
to the belt, whereby a positive motion without danger of slipping may be given to
those parts of the rotating mechanism to which the application of the devices
herein-before set forth for transmitting motion from shaft to shaft are not available.
Having reference now to Figures 1, 2ª, 2b, and Figures 17ª and 17b,-
The shaft A and the shaft C respectively are designed to give at their forward
ends a velocity varying at different stages of their revolution, and in order to do so
each of said shafts is divided into two sections, one at the front and the other at
the rear. The sectional form of the shaft C being more fully represented at c³ and
c in Figure 1, and that of the shaft A at a² and a³ in Figure 17, for example in the
former the front section ca has its axis parallel but not coincident with that of the
rear section of said shaft C; upon the section c* is placed a crank c³, which plays
into a slot c formed radially in the disc C³ on the adjacent end of the section c³.
As the section c* revolves, it of course transmits a rotary motion to the section c³,
but the movement of the latter being excentric to that of the former, the crank c
plays radially in the slot c, and consequently as it approaches the axis of the
section gives a more rapid movement, and as it is caused to recede from said axis
a slower movement to the section c³, a differential movement of the section c³, as
compared with the uniform rotatory movement of the section c*, being given to such
section c. In like manner the rear and front sections a² and a³ are connected by a
crank a on the one section working in a radial slot formed in a disc on the
adjacent end of the other section. It will be observed that by these means the
forward sections of the two shafts A, C, receive a differential motion, by which the
velocity of the parts actuated respectively by the said shafts may be duly proportioned,
graduated, or brought into the requisito relations with each other.
Having reference now to Figures 1, 8, 16, and 17,-
On the front end of the shaft A is a crank b which is pivoted in the upper arm of
an angular lever B¹, the lower arm of which is pivoted, as shewn, at 6¹ to a link B

page_text: the lower extremity of which is pivoted, as shewn, at 62 to the needle bar B. The
outer end of the long arm of the angular lever B₁ is pivoted to the upper extremity
of a swinging link B³, the rotation of the shaft A giving a rotatory movement to
the crank b, and acting through the upper and lower arms of the angular lever B¹,
and the link B² gives a vertical movement to the needle bar B, but inasmuch as the
lateral movement permitted to the angular lever B¹, from the freedom given to its
outer extremity, supported on the link B3 or equivalent guide, the link B³, the pivot
b¹, and the crank bare brought nearly or quite in line with each other during the
downward working of the needle bar, thereby giving a quick movement to the
needle bar, whereas when the crank is turned to give the upward movement to the
said bar the angular lever B¹ brings the upper and lower arms of the aforesaid
angular lever and the link B2 at a greater or less angle to each other, this causing
as it were a lost motion, in other words, requiring the movement of the crank
through a larger portion of a revolution to give the same length of stroke to the
needle bar in its upward motion; this retarded upward movement of the needle bar
affording time for the requisite movements of the stitch forming mechanism,
comprising the rotating hook, feed take-up, and other adjuncts. It is to be observed
in this connection that the said needle bar actuating mechanism just herein-before
described may be used in a shuttle machine by simply inverting the position of
the parts so as to retard the upward instead of the downward stroke of the needle
bar.
Having reference now more particularly to Figures 7, 8, 12, 13, and 14,-
F is the needle, solid at its top f and point f¹, but longitudinally split or divided
from its eye f upward through a considerable portion of its length, this split at the
upper part thereof being spread apart or enlarged at one or both sides to form a
comparatively wide opening f³ into and through which the thread may be passed
without any special care or skill, which done, the thread is pressed sidewise and
downward through the lower portion of the split or division of the needle until it
is brought into the eye f2. It is of course to be understood that the parts of the
needle upon the opposite sides of the division or split aforesaid press inward against
each other below the opening f³, and that the upper end of the eye fi is made
shouldered or straight across in order that the thread may not slip into the split or
division, which would cause it to pass back through the split and out of the eye.
This configuration of the upper part of the eye f' is more fully represented in
Figures 13 and 14.
Having reference now to Figures 23, 25, 26, 32, and 33,-
G is the rotary hook recessed in its front at g for the reception of the bobbin.
This hook instead of being cut away at the part gl at which the needle descends to
bring the needle loop into proper relation with the nose of the hook, as in the
ordinary forms of rotating hooks is constructed with a bridge G2, extending from
the heel g of the hook to the inner end g of the nose of the hook across to the
central cavity g, whereby the needle thread is prevented while being brought up to
complete the stitch from catching upon the heel of the hook.
Having reference now more particularly to Figures 4, 5, 6, and 24,
In the hook G coincident with the gap g thereof, and extending through said
part of the hook is provided a spring G³ the free end of which is bowed forward
to project through the aforesaid slot with its projecting portion go projecting to the
front or face of the hook across the gap. This portion of the spring constitutes a
projection, which except when drawn against by the thread makes continuous as it
were the internal circumference of the hook surrounding the bobbin, and thereby
prevents the drawing of the bobbin into the gap; but when the hook has reached
that part of its revolution at which the loop of the needle thread is drawn upward,
the said projection is thereby caused to yield, permitting the thread to pass through
the gap with the same facility that it would have done had no projection been
provided, provision being, by the means just described, made for the retention of
the bobbin in place without interfering with the free and proper upward movement
of the thread in the completion of the stitch.

page_text: Having reference now more particularly to Figures 23, 24, 25, 26, and 31,-
Upon the rear of the hook G at the circumference thereof is a circumferential
flange G extending entirely around the same, except that portion immediately
adjacent to the heel and nose of the hook; this flango in the rotation of the hook
prevents the needle thread from passing or slipping behind the hook, the flange
interposing a continuous barrier against the backward slipping of the said thread
from the time it has reached the rear or inner end of the nose until it is cast off.
Having reference now to Figures 27 and 28,-
H is a fixed plate or shoulder through which plays the stem of the hook, said
stem being connected with the hook actuating shaft C. This plate H fits against
the rear face or side of the hook, and has in its upper part a vertical groove h
through which the needle F plays; this groove however while preferable is not
essential to the operation herein-after presently explained of the device provided;
provision is made for permitting the descent of the needle in close relation with the
hook. This plate or shoulder, arranged in this relation with the hook, prevents the
needle loop from bulging backwards, and thereby makes a positive and at the same
time a slack loop in front of the needle, which of course ensures the proper passage
of the hook through the loop and prevents all slipping of stitches. In order to
bring the aforesaid plate or shoulder sufficiently close to the nose of the hook to
ensure its operation, as aforesaid, without cutting away the periphery of the hook
to such an extent as to impair its efficiency, the back or rear face of the hook is
circularly recessed, as shown more fully at G5 in Figures 28 and 31, to enable the
plate or shoulder H to be projected forward as it were within the hook for the
purpose just mentioned.
Having reference now to Figures 10 and 11, which represent the bobbin I
forming a part of my Invention, both in process of formation and complete,
By
In making this bobbin I take a piece of solid metal bored in the usual central bore
or hole, turn its sides nearly or quite parallel, I then turn in its periphery a deep
groove proportioned to the depth of the thread receiving interior of the finished
bobbin, taking care to bring the two opposite sides of the blank thus formed to the
requisite diameter, I then open the sides one or both inward to provide the requisite
narrow circumferential opening of the bobbin, and to bring the latter to shape.
this means I provide a bobbin more accurately brought to shape, better finished, and
more efficient in operation than those made by the ordinary method of fastening
the two opposite sides together by a central eyelet. There is a further peculiarity
about this bobbin forming as aforesaid part of my present Invention, in this, that
instead of having its circumferential opening in a plane midway between its two
sides this opening is formed at one side of the central plane of the bobbin, as shewn
in Figure 11, for example, one side of the bobbin may be nearly or quite flat, while
the opposite side may be curved inward until the requisite narrowness of the
circumferential opening is secured. By this construction of the bobbin with a
circumferential opening at one side of its central plane I am enabled to operate the
bobbin with a hook of much less depth than those required in the use of the
ordinary bobbin, and by this I am enabled to diminish the angle at which the
needle thread is drawn from the bobbin across the face of the hook, this of course
materially diminishing the friction and abrasion exerted upon the thread.
Having reference now to Figures 1, 3, and 16,-
The bobbin I placed in the front or face of the hook (see Figures 4 and 7) is
arranged in front of and opposite to the bobbin retainer J, which latter is formed
upon the end of the shaft J¹, longitudinally adjustable in the socket or bearing J2.
The shaft J is held in position in the socket or bearing J2 by a set screw j, the
shaft J¹ being adjustable longitudinally enables the retainer J. to be placed in contact
with the bobbin to retain the same in place with any desired degree of pressure.
The shaft being confined to a horizontal movement in a line coincident with the
axis of the bobbin requires no vertical or lateral adjustment whatever, and the care
and skill required in bringing it into proper position with reference to the bobbin
is of course materially diminished. Moreover upon the shaft J is provided a

page_text: pulley, which connects by a belt with a corresponding pulley ³, on the forward
section of a countershaft J³ driven by a belt and pulley from the pulley C2 of the
shaft C. By these means a rotatory movement is given to the bobbin retainer J in
the same direction as the rotation of the hook in which the bobbin is placed. By
this means friction is brought to bear upon both sides of the bobbin in a direction
opposite to the strain exerted on the latter by the bobbin thread, this of course
exerting a tension upon the bobbin thread, which is found advantageous in the
operation of forming the stitch. Furthermore upon this bobbin retainer arranged
to rotate, as just described, is provided a brush K which bears against the inner
periphery of the front or face of the hook. The rotation of the bobbin retainer, in
other words of the brush K, carried thereby is at a somewhat greater velocity than
that of the hook itself in the same direction, and in consequence of this at that
point in the revolution of the hook at which the thread is drawn therefrom, the
brush sweeps the thread from the nose of the hook sooner than it could be freed by
simple strain thereon, which latter would require the hook to advance further in its
rotation.
Having reference now to Figures 1, 8, 16, 17, and 22,-
L and L are the two excentrics set at a slight angle to each other upon the
forward section a³ of the shaft A. Each of these excentrics is provided with a
suitable strap 1, from which extends upward a rod or rods L2, which work through
a guide or slot . Arranged above these rods L² are two gripping plates L³ and L*,
the former vertically adjustable by a set screw, the lower resting upon the upper
extremities of the rods L. The plate L is capable of vertical movement between
the guides ; these plates constitute the tension device of the machine, and when
brought together automatically at the proper period in the formation of the stitch
grip the thread M between them, and hold or retain the same during the requisite
period. The hold or grip of these plates upon the thread during the required
length of time is obtained by the successive action of the two rods L upon the
lower plate L, for example one of the rods lifts the said plate to grip the thread
between the same and the upper plate L³, but when it reaches that point in the
revolution of the shaft A. at which the said rod begins to descend, and therefore
tends to release the plate L, the second of the rods is brought up against the said
plate and holds the same snugly upward to grip the plate during a further length
of time, thereby completing the period required in the formation of the stitch. It
is manifest that more than two of these rods can be made to operate in succession
to secure an even greater length of time for the grip of the tension upon the thread,
should such be required. It will be further understood that the two plates L³, L',
being adjustable by the screw 12 enables the tension to be readily adjusted for
materials of different kinds or for thread of different thicknesses.
Having reference now to Figure 29,-
It may be observed that the needle throat n of the cloth plate N is made straight
at its front from end to end, as shown from 1 to n². By this means the thread
instead of being permitted, as in the ordinary needle throat, to sway out of a
plane coincident with the direction of the feed of the cloth is kept directly in the
said plane, and thereby prevents the drawing of the cloth sidewise away from the
line of the feed during the formation of the seam.
Having reference now to Figure 27,-
It will be seen that at one end of the needle throat n in the cloth plate N, and
underneath the latter is provided a small friction roller n³. This friction roller
receives the contact of the thread while the hook is carrying the loop around the
bobbin, said friction wheel diminishing the wear and abrasion upon the thread
which ordinarily occurs from the drawing of the thread against the end of the
needle throat.
Having reference now to Figures 8, 15, 16, 18, 19, 20, and 21,—
The feed is supported at its opposite ends on swinging links O₁ and O2; the
lower extremity of the link O¹ is pivotted at the free end of the lever Othe
opposite end of which is pivotted in a bearing o made vertically adjustable by means

page_text: of a slot o¹, through which passes a set screw 02. 0 is an excentric on the forward
section of the shaft C, and on this is fitted a strap 05, from which extends the
rod 0, the outer end of which is formed with a slot os sliding in the link O³, and
made adjustable at any point along the length thereof by means of a set screw o*.
Upon the strap 05 of the excentric O' is fitted another strap 07, from which latter
strap extends downwards a rod 08 pivoted at its lower end to the lever 0³. It
results from this arrangement that a vertical movement is given to the feed by the
operation of the excentric 04 through the rod 08, lever 0³, and link O¹, simul-
taneously with which the same excentric O' acting through the rod 0° and link 09
gives a horizontal movement to the feed, thereby providing a four-motion feed of
peculiar construction. By raising or depressing the bearing o the feed may be
vertically adjusted to project a greater or less distance above the surface of the
cloth plate, and by adjusting the slot o³ at a greater or less distance from the pivot
or fulcrum of the link O the longitudinal throw of the feed O may be regulated or
adjusted to any desired degree, perfect adjustability to the requirements of various
kinds of work, together with a positive movement of the feed being by these means
secured, dispensing entirely with springs and their uncertainty of action. It will
also be observed that inasmuch as the feed O is supported upon the swinging
links O¹ and O its perfectly positive movement is provided for without the friction
which would be incident if the feed were arranged to move in longitudinal guides.
By substituting a compound excentric for the single excentric a double feed, that
is to say, two complete feed movements in ono revolution of the feed actuating shaft
may be secured.
Having reference now to Figures 1, 8, 16, and 17,-
P is a hanger depending from the front part of the frame of the machine, and
having pivoted to it at one side thereof a disc P¹; the pivot of this disc P¹ extending
quite through a bearing provided in the lower part of the hanger P has provided
upon its opposite end a slotted crank arm P2. This disc P¹ is arranged in front of
or forward of another disc P³ on the front end of the shaft A, and on this disc at
the periphery thereof is pivoted a crank arm, or as it may be termed, an adjustable
crank P. This crank P passes into the herein-before, specified slot of the crank
arm P. Upon this disc P¹ at a suitable distance from the centre thereof is a
deeply grooved wheel p, and a plate P5 is placed immediately in front of the disc P¹.
It is to be observed that the adjustable crank P* when it is attached to the disc P³
at its point of attachment to said disc may be turned to bring its opposite end or
twist p toward or away from the axial line of the shaft A, and may be adjusted
at any distance from said axial line by loosening and tightening the set screw p³,
which presses inward upon the shank by which the adjustable crank P' aforesaid is
attached to the disc P3. Moreover it is to be understood that the disc P¹ has its
pivot or axis of motion eccentric to that of the shaft A. The adjustable crank P
being adjusted with its wrist at the required distance from the axial line of the
shaft A is carried around by the rotation of said shaft A, and having its wrist
playing in the slot of the arm P³ causes the same to rotate, thereby communicating
a rotatory movement to the disc P¹, but inasmuch as the disc P³ is excentric, as just
explained, to the shaft A it follows that the movement of the disc P¹ instead of
being absolutely coincident with that of the shaft A revolves quicker at a portion
of its revolution and slower at another portion of its revolution than is the case
with the corresponding revolution of the shaft A; and inasmuch as the wrist p¹ of
the adjustable crank P may be adjusted and fixed at any desired distance from the
axial line of the shaft A it follows that the velocity of movement given at different
portions of its revolution to the disc P₁ may be adjusted to any extent required.
The thread M after passing through the tension devices, as herein-before explained,
is first brought down around the side of the lower step M' of the frame, thence up
through an eye, as indicated in dotted outline m, in Figure 16, thence upward
around the wheel p, thence downward again through the opening m to the needle.
The needle thread being thus as it were looped upward around the wheel p, the
differential motion of the wheel p being adjusted to the relative movements of the

page_text: needle the hook and other stitch forming mechanism, it follows that when the
wheel is brought to the lower part of the revolution of the disc P¹ the loop of
the needle thread M is released or slackened simultaneously with the downward
movenient of the needle in passing the thread through the fabric to be sewed ;
and with the subsequent action of tho hook upon the needle loop in the formation
of the stitch, and that when this is completed the wheel p being carried around
and upwards to the upper part of its revolution draws upon the loop, thereby
taking up the thread as required in the completion of the stitch. The wheel p con-
stituting a revolving take-up motion which is continuous in one direction although
at variable speed, avoids the back and forward movement of the ordinary take-up,
the jar, loss of power, and the like incident thereto.
It will be observed that while the wheel p, constructed and arranged as described,
is preferable in the operation of the revolving disc, inasmuch as it prevents wear of
the thread, and ensures greater smoothness, the operation of the revolving take-up,
although not producing so perfect a result, will be the same if instead of the wheel p
a pin more or less grooved, or even without grooves, will perform the same function,
that is to say, the taking-up of tho needle thread in the tightening of the stitch by
a continuous rotatory movement of unequal velocities at different portions of its
revolution. It is also to be observed that the plate P³ placed in front of the disc P¹
serves to shield the revolving take-up, and to prevent the slipping of the thread
therefrom.
It will be noted as an especial merit of the revolving take-up that the thread is
taken up and slackened without any abrupt strain thereon, and that other things
being equal a lighter thread may be employed for the same degree of strain, and the
same degree of tension exerted with the machine run at any great or unusual degree
of speed.
Having reference now to Figure 17,-
Provided in suitable bearings in the lower part of the step M of the frame is a
rock shaft Q, upon the forward end of which is n cam g, upon the upper side of
which rests a pin q' projecting laterally from the shaft of the presser foot Q. Upon
the opposite or rear end of this rock shaft Q is a crank arm q, and around the
shaft itself is provided a friction spring q³, which presses upon the rock shaft to
keep it in any position to which it may be turned. By turning the crank g³ the
will be turned to lift upon the pin ql, and consequently raise the needle bar,
thereby holding up the presser foot Q₁ when desired, the rock shaft Q and its cam q
being retained in this position until turned back by the crank q by the pressure
of the spring q³ on said rock shaft. In order to lower the presser foot the rock
shaft is simply turned in an opposite direction.
cam
The second part of this Invention comprises the combination of a crank pin on
the needle actuating shaft, a fulcrumed connecting rod, and a universal joint con-
necting said fulcrumed rod with the bar or shaft, arranged to give motion to the
thread hook in unison with the needle, whereby such unison of movement is
provided without the usual bearings, gears, belts, and the like, a smooth, positive,
and comparative frictionless transmission of motion being thereby provided for.
Also a thread hook provided upon the end of a lever working on a ball joint, and
arranged to carry the needle thread around the bobbin in the formation of the
stitch without itself turning on its own axis, whereby the friction of the parts, and
the wear upon the thread incident to the use of the usual rotating book and bobbin
is entirely obviated, and the twisting of the thread ordinarily experienced is
avoided.
Also a bobbin arranged in a fixed shell or receiver in combination with a thread
hook arranged to have a circular motion around said bobbin without rotating on
its own axis, whereby provision is made for the carrying of the needle thread around
the bobbin, and for its certain and rapid release at the moment required for the
completion of the stitch.
It further comprises a novel combination of a vertically grooved fixed plate, the
bobbin and the thread hook arranged to move around the bobbin without turning

page_text: on its own axis, whereby provision is made for the certain passage of the thread
hook into the loop of the needle thread without liability of the displacement of the
bobbin or the consequent breaking of the needle.
Also the combination with the feed of an actuating rod working on a ball joint,
and itself connected by a universal joint with the bar or shaft carrying the thread
hook, the latter being also arranged to work on a ball joint, whereby without
appreciable friction the requisite movement is given to feed in unison with the
movement of the thread hook.
Also a novel combination with the needle shaft of a pivotted slotted arm or lever,
and a crank on the adjacent end of the needle actuating shaft, whereby provision
is made for the requisite differential movement of the needle bar in unison with the
other parts of the stitch forming mechanism.
And a novel combination of a take-up eye on the aforesaid slotted arm, with a
fixed eye in such manner as to provide a simple and efficient take-up mechanism
acting in perfect harmony with the movement of the needle and other parts of the
stitch forming mechanism.
Figure 34 is a side view of a sewing machine made according to my Invention ;
Figures 35 and 36 are front views of one portion of the same.
Figures 37 and 38 are front views representing certain modifications of one
feature thereof; and Figures 39, 40, and 41, are detached detail views of certain
portions of the mechanism herein-after described.
A** is the needle actuating shaft, provided at its forward end with the crank b*a
and at its rear end with the crank D*a. This shaft A* may be provided with a
driving pulley A*b, which in such case constitutes it the driving shaft of the
machine; C* is a shaft or bar at the forward end of which is a hook c** herein-
after more fully explained. This bar Ca works on a ball joint Cb, as represented
in Figure 34. At its rearmost end this bar Ca is connected with an upright con-
necting rod D*b (herein presently more fully explained) by means of a universal
joint D. This joint being of well known construction needs no special description.
The upper end of the connecting rod Deb is attached to the crank D*a. At or near
its central part the rod D*b is slotted, and through this alot passes a fixed pin or
fulcrum d. The rotation of the shaft A* gives a compound movement to the
connecting rod D*b, said rod not only moving vertically but also having a rocking
movement upon its fulcrum d*, this peculiar motion of the connecting rod D❤b
acting through the univeral joint De gives movement to the bar Ca around on its
ball joint Cb; this movement is such that while the axis of said bar is carried
around in a circle, the bar itself does not turn upon its said axis, consequently all
parts of said bar bear substantially the same relation to the vertical at all parts of
the revolution of the said shaft upon its ball joint C*b, as aforesaid; E* is the
bobbin, which may be of the usual construction, or with one flat side as indicated
in Figure 34. This bobbin is placed within its stationary shell, the front of which
is constituted by the vertical plate E*b and the rear plate e*, this latter hinged
at one side, as shewn at e*b in Figure 41, and provided with a set screw c*c,
whereby on occasion it may be released and swung outward to permit the insertion
or removal of the bobbin. It will be observed that this plate ea is attached only
at one side in order to permit the movement, herein-after explained, of the needle
thread around the bobbin; its point of attachment, for instance the hinge e*b, being
so situated that the needle thread shall slip from the needle hook previously to the
passage of the hook past such point of attachment. Formed in the inner side of the
plate E is a vertical groove into which the needle F* passes in its downward
movement; the surface of this groove being so close to the needle as to throw the
needle loop backward to make the same more open and prominent, and thereby
facilitate the catching of the thread hook thereon; O* is the feed, one end of which
is pivoted at oa to the upper end of a swinging link O*b, while the opposite end
of said feed is provided with a socket o❤b, into which fits the rounded forward
end na of a bar or shaft N*a, which works on a ball joint n*b. The rearmost end
of this bar Na is connected by a universal joint me with the bar or shaft Ca,

page_text: such point of attachment to said bar or shaft C being preferably forward of the
ball joint C*b. When the bar or shaft Ca is worked upon its ball joint C*b, as
herein-before explained, a movement is communicated to the shaft or bar Na
working upon its ball joint nb, which movement is of substantially the same
character as that of the shaft or bar C*, and serves to give the requisite movement
to the feed Oxa in unison with the movements of the thread hook C*a upon the end
of the shaft or bar C*a; B*a is the needle bar; having the needle F* attached
thereto in the usual manner. This needle bar is connected with a pivoted slotted
arm Bb, the upper end of which is pivoted to the upper side of the slotted
arm B*b, as represented in Figures 35 and 36, or by a similar pitinan pivoted to the
lower side of said slotted arm, as shewn in Figure 37, or by means of a pin or stud
projecting from the needle bar into a secondary slot provided in said slotted arm,
as represented in Figure 38, these several means of connecting a needle bar with
the slotted arm being for the purposes of this Invention considered as mechanical
equivalents of each other. The arm B*b is pivoted to a fixed support as indicated
at b*b, and its slot b*c has passing into and through it the crank b× on the forward
end of the needle actuating shaft A*a, the said slot b*c is moreover more or less
curved according as it is desired to give a more or less rapid movement to the
needle bar Ba at the different portions of the stroke thereof. It will of course be
understood that the rotation of the shaft A*, giving a corresponding motion to its
crank be, the latter communicates a rocking movement to the slotted arm B*b, and
this latter through its connection with the needle arm transmits the requisite move-
ment to the latter. The shape of the slot 6* in connection with the varying
distance from the pivot b*b of the arm B*b, at which the crank b* acts upon said
lever B*b gives a differential movement to the needle bar, which causes the latter to
move in the requisite unison with the rotation of the thread hook and the move-
ment of the feed. In a shuttle sewing machine the form and position of the slot
in the arm B*b may be the same, as shewn in Figures 35, 36, 37, and 38, but should
a common rotary hook be used the position of the said slot should be reversed, as
for example, if the arm were turned upside down. At or near the outer extremity
of the lever B*b is provided a take-up eye P*a, and lower down upon the frame of
the machine is a fixed eye P*b. There may also be above the lever B*b another
fixed eye P*; the needle thread passing from the spool down through the eye P*°
is passed through the eye P*b, thence upward to the take-up eye P*a on the
arm B*b, and thence downward to the needle, as represented in Figures 35 and 36,
the upward movement of the arm B*b being coincident with the release of the
needle thread from the thread hook; said upward movement of the lever B*b operates
as a take-up to draw or tighten the needle thread in the completion of the stitch.
In the operation of the machine the rotation of the shaft A*a acting through the
connecting rod Dob fulcrumed at da, as herein-before described, communicates the
peculiar movement to the bar or shaft C* around the ball joint of the latter; this
carries the needle hook around the bobbin E without changing the position of the.
hook with reference to the vertical, consequently the said thread hook passing to
and into the loop of the needle thread, catches the same and carries it around the
bobbin until on reaching the opposite side of the bobbin its position relative to tho
loop is changed so that the hook no longer holds upon the throad, which done the
take-up draws and tightens the said thread to complete the stitch, it being under-
stood that the carrying of the needle thread around the bobbin brings the same into
such relation with the bobbin thread as to form a lock stitch.
It will also be observed that the needle thread being carried around in this manner,
all twisting of the needle loop such as occurs in a rotary hook machine commonly so
termed is avoided.
It will also be observed that the needle loop being thrown backward by the
contiguity of the needle with the bottom of the groove ed in the plate F*b, the
thread hook being carried in its movement around the bobbin without turning on
its own axis is enabled to pass readily into the needle loop, thereby ensuring the
perfect and uniform catching of the thread hook upon the loop without liability of "

page_text: the skipping of stitches. Furthermore the groove e*d is essential to the aforesaid
operation for the reason that were a space sufficient for the descent of the needle left
between the rear face of the plate E*b and the adjacent side of the bobbin, the
bobbin would be liable to slip forward and break the same in its descent.
The third part of this Invention comprises a novel combination of a book with a
bobbin and an independent bobbin frame whereby the construction of the hook
itself is materially simplified, and whereby the hook is enabled to rotate independent
of the bobbin. Also the combination with the bobbin of a hook of peculiar con-
struction whereby the back of the needle loop is carried behind the bobbin and the
front of the said loop in front of the bobbin throughout an entire revolution of the
hook in such manner as to form such loop complete without twisting the thread and
without the help of the usual cast off. And a novel combination of a fixed guide
with the bobbin and the hook whereby the slipping of the needle loop from the
bobbin during the formation thereof as just described, is prevented.
Figures 42 and 43 are front or face views of these improvements, showing the
parts in the positions occupied at two different stages in the formation of the needle
loop; Figures 44 and 45 are side views of the same, also indicating two different
positions of the parts; Figure 46 is a central longitudinal sectional view of the
same; and Figure 47 is a similar view showing a modification of the same.
V is a bobbin frame fixed to a suitable support on the frame of the sewing
machine to which this part of my said Invention is applied. This bobbin frame is
of circular form and at the upper side has an opening v, the purpose of which will
herein presently appear. This bobbin frame is nearly or quite concentric with the
shaft V1 of the rotary hook V2, the latter being, when in operation, rotated in the
bobbin frame V aforesaid. The hook V2 is formed at one lateral edge of a disc v¹,
by which it is attached to the shaft V₁, the circumferential contour of the look
being as it were on the are of a circle concentric with the bobbin frame, and with
its own axis of rotation. The beak v2 of the hook is at the back thereof, the front
edge of said beak sloping forward or outward to the front of the hook where it
terminates in a shoulder ; W is the bobbin axially pivoted within the usual case
or shell w, the thread w¹ from the bobbin passing out in the usual (or in any suitable
manner) through a transverse slit or other opening in the shell. The bobbin and
its shell are kept to their places within the bobbin frame by the ring slide X bearing
lightly against the front or face of the bobbin as represented in Figure 46; in lieu
of the ring slide however a clamp or bar may be attached to the front of the fixed
bobbin frame and extending across in front of the bobbin, serve to keep the same in
position as indicated at x in Figure 47. The needle F*1 of the sewing machine is
arranged in the same relation to the hook as is the case with the ordinary types of
rotating hook and hence requires no specific description here.
When the needlo
descends to form the needle loop the latter is caught in the usual manner by the
beak of the hook, but the continued movement of the latter causes the back part
of the loop to pass into the deep notch * behind the beak v², while the sloping
front of the beak widens the loop until the front part thereof catches upon the
shoulder, whereupon the continued rotation of the hook carries the loop quite
around the bobbin to form in connection with the bobbin thread w¹, the requisite
lock stitch. It will be observed that in this manipulation of the loop f*, the beak v²
serves to carry the part of the loop behind the bobbin while the shoulder serves
to carry the front part of the loop in front of the bobbin, the loop being thus formed
complete without twisting the needle thread from or of which it is formed, and the
loop being thrown off from the hook by the completion of the revolution of the said
hook, no "cast off" so termed is required for the completion of the stitch.
It will be observed that the opening in the upper part of the bobbin frame V
permits the passage of the needle F*1 downward into the required relation with the
hook V, and also the requisite passage of the needle loop f* to and around tho
bobbin as just herein set forth. Bounding this opening v at the front of the bobbin
frame is a guide ¹, the form and position of which is more clearly represented in
Figures 44 and 45. This may consist of a piece of wire soldered at each end at the
.

page_text: opposite front corners of said opening, and it serves the purpose of keeping the front
part of the loop from drooping too far forward to catch upon the shoulder v³ which
if no provision were made against it would be likely to cause the loop to
prematurely slip from the bobbin and thus prevent the formation of the stitch.
It is to be observed that as the hook V is not like the ordinary rotating hook
required to set or hold the bobbin; its construction is much more simple and that it
is capable of a movement independent of the bobbin, the operation of the hook
being to form the needle loop requisite in the formation of a lock stitch by simply
carrying the needle loop quite around the bobbin without hoisting the same as
ordinarily done in rotating hook machines.
The fourth part of this Invention comprises a loaded plunger so combined with
the bobbin of a rotary sewing machine hook as to press the bobbin forward or out-
ward and provide an appreciable space for the passage of the needle thread behind
the bobbin whereby the friction and wear ordinarily exerted upon the said thread
by binding between the bobbin and its seat or socket is entirely obviated.
Also a bobbin clamp fixed to the rotary hook and carried around with the same
whereby the ordinary ring slide is dispensed with and the friction exerted by said
ring slide upon the bobbin is avoided.
Also a novel combination of a spring and pivot with the aforesaid bobbin clamp
hook and bobbin whereby provision is made for the convenient removal and
replacement of the bobbin when required.
The said Invention further comprises in a rotary sewing machine hook a bobbin
shell constructed with an excentrically movable stud in combination with a bobbin
formed with a groove in its internal periphery, whereby the axial attachment of
the bobbin within the steel and consequent free but secure retention therein is
provided for.
Also a bobbin constructed with a central-thread delivery, whereby the bobbin
thread is always kept at the same distance from the cloth, and consequently an
equal or uniform tension is secured to the bobbin thread throughout the formation
of the stitch.
Also a rotating sewing-machine hook constructed with a rebate at its rear or
inner periphery, whereby room is afforded for a "feed" of any suitable kind at the
same time that the hook itself may be brought close to the cloth plate of the
machine to diminish to the utmost possible degree the length of thread required to
be drawn through the cloth in the formation of the stitch, and whereby the feed
may be brought nearer to the front of the hook to co-operate therewith in the
formation of the stitch.
Figures 48, 49, and 50, are front or face views representing this modification of
my Invention with the parts at different positions; Figures 51, 52, and 53, are
central sectional views of a portion of the same taken in a plane at right angles to
Figures 48, 49, and 50, Figures 52 and 53 being on an enlarged scale, and
Figure 54 is a sectional view of one part of my said Invention taken in a plane
parallel with Figures 48, 49, and 50.
Y is the hook shaft, upon the forward end of which is formed the hook Y¹ which,
except in the features herein specifically defined, may be of any suitable construction
for the formation of a double-thread or lock stitch. The forward end of the shaft Y
is bored out axially, as shown at y in Figure 51, and in this bore y is placed a
plunger Y provided with a spiral spring y' which tends to press the plunger
forward and outward. This plunger is formed with a rounded head y which
presses against the back or inner side of the bobbin Z; this latter is placed within
the bobbin shell or case Zx to which it is attached, as herein-after described. Y³ is
a clamp pivoted at to the periphery of the hook Y¹, and with a spring y also
attached to the periphery of the hook Y₁, pressing the said clamp inward to the
position upon the front of the apparatus shown in Figures 48 and 49. This clamp
is of the curved form plainly represented in the just-named Figures, being open at
one side. The clamp must be of substantially this form, in order to permit the
proper relation and co-operation of the bobbin thread and needle thread in the
1 2

page_text: formation of the stitch. While the head y2 of the plunger bears against, the back
of the bobbin the clamp Y³ holds it in front, the clamp bearing of course against
the case or shell Z*. The plunger Y2 being passed forward by its spring y keeps
the bobbin at an appreciable distance from its socket y in the hook Y¹, thereby in
the requisite passage of the needle thread (in substantially the usual manner) behind
the bobbin insuring a space sufficient for the passage of the said thread behind the
bobbin without the friction and wear to which in the rotating hooks hitherto devised
it has been necessarily subjected. Inasmuch as the clamp Ys retains the shell of
the bobbin, and consequently the bobbin in its place in the hook, the ordinary ring.
slide and the friction resulting from its use are discarded.
Formed internally on the shell Z* is a boss having a recess in one side in
which is pivoted a stud 22, the boss z forming the axial bearing for the bobbin Z.
In the inner periphery of the bobbin Z is a groove extending quite around the
same and in position coincident with the stud z. The pivot 2 is capable of partial
rotation by a screwdriver inserted in its grooved head; by turning the pivot
therefore the stud is moved outward and made to project into the groove 23, as
shown more fully in Figure 54, thereby insuring the axial attachment of the bobbin
to its shell. By reversing the position of the stud it is of course disengaged from
the shell, and the bobbin may be detached from the shell when for any purpose
desired.
The bobbin is made with a central delivery for its thread 2, that is to say, that
the thread instead of passing direct from the circumference of the bobbin, as hath
hitherto been the case, is made to pass from the centre or axis thereof, in order that
the bobbin thread may be at all times at a uniform distance from the cloth in the
formation of the stitch. This may be accomplished in either of two ways; one
illustrated in Figure 52, the other in Figure 53. In the former a hole or orifice z*
is made through the axis of the shell Zx, said orifice being of course axial to the
bobbin. The bobbin thread Z³ is first passed from the bobbin through the usual
eye (one ore more) in the periphery of the shell, thence behind the bobbin, and
thence out through the central orifice * just mentioned. This method, (as indicated
in Figure 52) is preferable only when more or less tension strain or drag is desired upon
the bobbin thread 2, inasmuch as said thread must on its way to the orifice z* pass
between the head y of the plunger Y2 and the adjacent surface of the bobbin. In
the method represented in Figure 53 the eye or orifice, also in this marked ** is
formed through a spur 27 in the face of the shell Zx, the orifice being in a line more
or less parallel with the said face. The thread is brought from the peripherical
eye over the front or face of the bobbin, and thence into and through the
orifice in the spur 27 for central delivery from the bobbin, as herein-before set
forth. As will be seen by reference to Figure 51 the rearmost circumforential part
of the hook Y¹ is rebated as shown at Y. This rebate Y affords space for the
working of a suitable feeding mechanism, the said feeding mechanism or "feed"
being thus brought closer to the point of the hook-than would otherwise be possible,
and the hook itself and its appurtenances may be brought up close to the under
side of the cloth plate of the machine, by which means the length of the thread
required to be drawn through the cloth in the formation of a stitch, and consequently
the wear and abrasion of the thread is materially reduced.
The 5th part of the said Invention comprises a novel combination of a rock shaft
and crank arm connected by a link above the axis of the rock shaft with the needle
bar, the several parts being arranged to operate in such relation with the rotary
hook that the needle is lifted up and clear of the hook during the greater portion of
the revolution thereof, but caused to rapidly descend into the requisite relation
there with as the nose of the hook approaches to pass through the needle loop in
the formation of the stitch, and to ensure the rapid raising of the needle out of the
way of the further revolution of the hook as soon as said nose has passed into and
through the needle loop.
It further comprises a novel combination with the rotary shaft carrying the hook
And the rock shaft having its crank arm connected by the link with the needle bar,

page_text: as herein-before explained, of a crank on the rotary hook shaft, a secondary crank
arm on the rock shaft, and a connecting rod between the crank and the last-
mentioned crank arm, whereby the rotary hook and the needle bar are caused to
move and operate in the requisite union with each other.
Also in a rotary hook sewing machine a fixed plate or shoulder arranged in such
relation with the needle and the hook as to prevent the backward movement of the
loop, and thereby provide against slipping of stitches.
Also a rotary hook circularly recessed or chambered in its rear side in combination
with the fixed plate or shoulder, whereby provision is made for bringing the fixed
plate or shoulder sufficiently close to the nose of the hook without impairing the
efficiency of the latter by cutting away its periphery.
Figure 55 is a front view of a sewing machine embracing the features of this
part of my Invention; Figure 56 is a rear viow of the same; Figure 57 is a view
showing portions of the front and rear thereof; Figure 58 is a longitudinal sectional
view showing the hook and its adjuncts constructed according to this part of my
Invention.
Figures 59 and 60 are detail sectional views of that portion of the part of this
Invention also indicated in Figure 58; Figure 61 shews detached portions of the
same.
Ba is the needle bar working in the usual vertical guides, and having affixed
thereto a block be, to which at bb is pivoted the upper end of a link Bb, the lower
end of which at be is pivoted to a crank arm Be, which latter is arranged upon the
forward end of the needle actuating shaft Aª. At the opposite end of this needle
actuating shaft Aa is provided a second crank arm sa; to this at sb is pivoted the
upper end of a rod or pitman Sa, the lower end of which at se is pivoted to a
crank ad on the rearmost end of the rotary hook shaft Ca; this rotary hook shaft
receives its rotatory movement by any suitable means, and has upon its forward
ond the hook G.
From the arrangement of the parts just herein-before described it will be seen
that the rotation of the shaft Ca gives a continuous rotary motion to the hook G,
and simultaneous with this gives a rocking movement to the shaft A.
It is also to be observed that the link Bb, by which the crank arm Bo of the
shaft A is connected with the needle bar Ba, is placed above the axis of motion of
the shaft As, the object of this being to cause the lost motion of the crank arm Be
and link Bb to occur, while the needle bar is lifted during a major part of each
revolution of the rotary hook. As the rotation of the shaft Ca, acting through the
pitman S and crank arm 8ª, causes the crank arm Be to move upward toward and
to a vertical position it lifts the needle bar with the needle clear of the hook.
When the crank arm Be and the link Bb are brought in line with each other their
movement at the pivot be causes them to be turned to an opposite angle from that
which they previously occupied in relation with each other, this turning producing
a lost motion; in other words, a motion which gives no considerable movement to
the needle bar. When the limit of the rock shaft in one direction is reached its
reverse movement produces the same result, so far as concerns the action of the
crank arın Be and the link Bb until the crank arm Be approaches its original nearly
or quite horizontal position, at which portion of the stroke of the rock shaft the
crank arm Be exerts a quick and positive downward action upon the needle bar,
causing the needle to descend into proper relation with the nose of the rotary hook.
After the nose of the rotary hook has passed through the needle loop the reverse
movement of the rock shaft gives a quick and positive lift to the needle bar.
the crank arm Be recedes from its nearly or quite horizontal position the motion of
the needle bar again becomes inconsiderable and immaterial, as the crank arm Bo
passes upward and back and forth, as just herein-before explained. By this means
a very simple, positive, and efficient means of causing the needle to act in proper
time and unison with the movement of the hook is produced, each stitch being
completed by a single revolution of the hook. As shewn in Figures 58 and 60 H
As

page_text: is a fixed plate or shoulder through which plays the stem of the hook, said stem
being connected with the hook actuating shaft Ca; this plate H fits against the
rear face or side of the hook, and has in its upper part a vertical groove h through
which the needle E plays; this groove however, while preferable, is not essential to
the operation herein-after presently explained of the device, provided provision is
made for permitting the descent of the needle in due relation with the hook.
This plate or shoulder arranged in this relation with the hook prevents the needle
loop from bulging backwards, and thereby makes a positive, and at the same time a
slack loop in front of the needle, which of course ensures the proper passage of the
hook through the loop, and prevents all skipping of stitches.
In order to bring the aforesaid plate or shoulder sufficiently close to the nose of
the hook to ensure its operation, as aforesaid, without cutting away the periphery
of the hook to such an extent as to impair its efficiency the back or rear face of
the hook is circularly recessed, as shown more fully at G 5, in Figures 59 and60
to enable the plate or shoulder H to be projected forward within the hook for
the purpose above mentioned.
The sixth part of this Invention comprises a novel combination of a rotary crank
wrist with two oscillating crank wrists; the one connected with a rotary wrist by
a suitable link, and the other with the needle bar by a connecting rod or pitman,
whereby a lost motion is produced when the needle bar is depressed to or near the
limit of its downward movement, thereby ensuring the retention of the needle and
needle loop in their depressed position during the length of time requisite in the
proper passage of the shuttle through the needle loop, the same combination when
reversed in position being adapted for use with a rotary hook.
Also a take up arranged upon the pitman and in such relation with a suitable
eyelet as to provide a simple and effective means of taking up the needle thread
at the requisite stage in the formation of the stitch.
It further comprises a novel combination of needle and shuttle, whereby two
descents of the needle to one complete or full motion of the shuttle are secured,
thereby doubling the number of stitches produced from any given number of move-
ments of the shuttle.
It further comprises in a shuttle machine a double-ended shuttle, that is to say,
a shuttle having a nose, so termed, at each end, whereby the shuttle is enabled to
pass through the needle loop when moved in either direction.
Also a shuttle actuating rod constructed with an elastic joint or coupling in
combination with an operating crank and with the raceway of the shuttle, whereby
the shuttle is caused to remain stationary during a definite or appreciable length of
time at the end of its stroke, in order to permit the requisite succeeding move-
ments of the needle, the actuating crank meanwhile being permitted to rotate by
the yielding of the joint or coupling while the shuttle is thus at rest, thereby
insuring the requisite movement and operation of the shuttle without interrupting
the continuous rotation of the shaft dctuating the same.
Also a novel combination with a four-motion feed of an operating shaft working
on a ball joint, whereby a definite noiseless and comparatively frictionless four-
motion movement is given to the said feed.
It further comprises a novel combination of the aforesaid actuating shaft working
on a ball joint with a feed free at one end, and suspended at the other from a
swinging stirrup, whereby an extremely simple construction of the feed and its
adjuncts is secured, and perfect freedom given to the same in its operation.
Also a novel combination with the actuating shaft working on a ball joint, and
arranged to operate the feed of an eccentrically socketted shaft receiving the end
of the actuating shaft aforesaid, and provided and operated to give the required
movement to said actuating shaft.
It further comprises in combination with the actuating shaft operating the four-
motion feed of a ball joint adjustable along its entire length, whereby the throw of
said feed may be adjusted at will, and a novel combination with the shafts trans-

page_text: mitting motion in unison to the needle bar and the shuttle of a peculiarly con-
structed system of universal joints, whereby the use of cog gearing in the transmission
of such motion may be to a certain extent avoided.
Figure 62 is a side view of a sewing machine constructed according to this part of
my Invention.
Figure 63 is a detached view of its feed mechanism.
Figure 64 is a detached side view and partial section shewing the elastic joint in
the rod which gives motion to the shuttle.
Figure 65 is a detached sectional view of the feed actuating shaft and its ball
joint.
Figure 66 is a front view of the machine, and Figure 67 is a rear view of the
same.
Figure 68 is a detached view of the shuttle forming part of my said machine.
Figure 69 is an inverted plan of the said machine.
Figure 70 is a plan shewing the cloth plate, the feeding surface of the feed
mechanism, and the shuttle in the position occupied thereby at the completion of its
forward or outward stroke in the formation of a stitch.
Figure 71 is a similar view shewing the position of the shuttle at the completion
of its back ward or inward stroke in the formation of a second or subsequent stitch,
And, Figure 72 is a vertical transverse sectional view of the feed and adjacent parts
the line x, x, of Figure 71.
Ab is the needle operating shaft upon the forward end of which is provided the
crank or rotating wrist pin bd. Bd is a disc axially pivoted at be. Upon this disc
are two wrist pins bf and be. From the rotating wrist pin bd to the wrist pin br
extends a link Be; the wrist pin bf is placed at such distance from the pivot bo or
axis of motion of the disc Bd that the rotation of the crank or wrist pin bd instead
of communicating a rotatory motion to the wrist pin bf gives an oscillating movement
thereto, the wrist pins of and be being therefore rocking wrist pins in contradistinction
to the crank or wrist pin bd. To a suitable pivot or connection bb, provided on the
needle bar B, extends a rod or pitman Bs. It will be seen therefore that the rotation
of the wrist pin bd giving an oscillating or rocking movement to the wrist pins bf, bg,
operates through the pitman Bs to give a vertical reciprocating motion to the needle
When by the revolution of the shaft Ab the link Be is brought parallel or
coincident with the pitman Be the needle bar is in its most depressed condition
with the wrist pin bd passing over its point and consequently giving no movement
to the rocking wrist pins bf, bg, or to the needle bar; the movement communicated
to the latter as the wrist pin bd passes to and recedes from the dead point, being so
slight as to be immaterial. By this means the needle bar is kept depressed for a
period or length of time sufficient to insure the complete and proper passage of the
shuttle through the needle loop. Upon the pitman Bg is provided a metallic loop Pa
which constitutes the taker-up of the machine.
bar.
Formed in any suitably adjacent portion of the machine is an eylet Pa which may
be situate as represented in Figure 66. The thread passing from the usual or any
suitable tension passes downward, thence upward through the eylet pa, thence
through and downward from the take-up Pa, again through the eylet pa to the eye
of the needle Fa, the lateral movement of the pitman Be in the operation of the
needle bar, as herein-before explained, occuring at that stage in the formation of the
stitch required in the taking-up of the needle thread, the take-up Pa therefore
serving to draw or tighten the thread in the completion of each stitch. Ra is the
shuttle which has a reciprocating motion in the raceway or guide Rb. This shuttle
has a longitudinal to-and-fro movement and, as herein-after explained, operates in
the formation of a separate, distinct, and complete stitch at each of its movements in
either direction, that is to say, of two stitches to each full and complete movement
to and fro of said shuttle, the needle descending for example at the outward or
forward movement of the shuttle to form one stitch, and again descending at the
inward or backward movement of said shuttle to form a second or subsequent stitch.
In order to give this movement to the shuttle the shaft Ab actuating the needle bar

page_text: - must have two revolutions to one revolution of the shaft which actuates the shuttle
The shaft which actuates the shuttle is shewn at Da and is geared with the shaft Ab
by suitably proportioned gears aª, aa, as shewn more fully in Figure 62. Upon the
lower end of the shaft Da is a crank Db, to which is attached the shuttle actuating
rod T, this latter having attached to its forward end the sliding carrier Ta which has
shoulders t, ta, at each end which bear upon the upper surfaces of the extremities of
:the shuttle, so that when the said carrier Ta is inoved to and fro a corresponding
reciprocating movement is given to the shuttle, and this without interfering with
the entrance of the nose or noses of the shuttle into and at the passage of the latter.
through the needle loop. It will be seen that from this arrangement one revolution
of the shaft Da will give an outward and also an inward movement to the shuttle,
and at the same time ensure two revolutions of the shaft Ab to cause two descents
of the needle, one for the forward or outward movement of the shuttle, the other for
the inward or backward movement of the same for the formation and completion of
two separate and distinct stitches. The advantage of this is apparent when it is
remembered that with a reciprocating shuttle there is a limit of speed which cannot
be exceeded without injury to the machine and interference with its proper workings.
By means of the feature just described of my Invention the same speed of shuttle is
made to give double the number of stitches, thereby practically doubling the capacity
for the work of the machine. Inasmuch as the shuttle Ra should preferably remain
stationary during a certain definite and appreciable time at the completion of each
outward and each inward stroke, the carrier Te is limited in its longitudinal move-
ment by stops a arranged to limit the longitudinal stroke in each direction of said
carrier and consequently of the shuttle Re. These stops may be elastic, as for
example when made of india-rubber. In order, however, that this cessation of motion
in the carrier attached to the shuttle actuating rod T may not interfere with the
required continuous rotation of the needle actuating shaft Ab geared with the shuttle
actuating shaft Da, as herein-before explained, the rod T is constructed with a
yielding or telescopic joint Tb. To provide this yielding or telescopic joint the said
rod is made in two sections tb, te, the former solid, the latter hollow with the former
passing into the latter as represented in Figure 64. The section to is recessed at one
side as shewn at td. A spring plate te attached to the section to has a lip tf passing
into the recess td with preferably a friction packing ts interposed between said lip
and the adjacent surface of the section tb by ineans of a set screw th. The plate to
may be pressed inward to force the packing ta with a suitable degree of friction
against the section tb; this friction is sufficient to keep the two sections fixed in the
same relations with each other so long as the longitudinal pressure thereon is only
that required in the movement of the shuttle itself; but when the movement of the
shuttle is checked, as for example at the end of its forward or outward stroke, the
joint yields, permitting the section te to move telescopically into the section to during
the continuous rotation of the crank Db necessarily occasioned by the continuous
rotation of the shafts Ab Da. When, on the other hand, the movement of the shuttle
is checked at the end of its reverse or inward and rearward movement, the joint
yields in the opposite direction, the section to being drawn out from the other
section to to permit the still continuous movement of the crank Db, occasioned as
before explained by the necessary continued rotation of the shafts Ab, Da. It is to
be understood that while this limitation of the forward and backward stroke of the
shuttle is very much preferred, in practice such limitation could be in some cases
dispensed with by increasing the throw or length of movement of the shuttle, so
that the time occupied in moving the further distance would permit the operation of
the needle in the same manner as when the shuttle is kept stationary at the end of
its inward and outward movement for the same period of time.
In order that the shuttle may be thus used at each of its inward and of its
outward strokes in the formation of a complete and distinct stitch, as herein-before
explained, the said shuttle is made with both of its ends pointed or provided, each
with a nose, substantially of the contour of the single nose provided to the ordinary
shuttle, the shuttle, in other words, being made double in order that it may operate

page_text: in the formation of the stitch, whether moving with one end or the other foremost ;
O is the feed, the upper surface or working face oa of which projects through the
cloth plate Na in the usual manner. One end ob of this feed is free or unattached;
the opposite end is pivoted at 0° to the lower end of a link Ob, the upper end of
which at od is pivoted to a fixed bearing on the frame of the machine. In the rear
or inner side of the feed Oa is a recess or socket o° which receives the rounded
forward extremity of a fixed actuating shaft 0°. On this shaft Oc is placed a
longitudinal movable sphere of. This sphere of is pivoted into a spherical seat
provided in a block O, which latter is adjustable on a slotted guide Oe, a set
screw of passing through the slot oh of the guide Oc in such manner that by
tightening said set screw at any part of said slot oh the block, and consequently the
spherical seat receiving the sphere of, may be at a greater or less distance from the
centre of the feed actuating shaft Oc. The rounded opposite or inner end of the
shaft Oo fits in a socket oi formed in the end of a short shaft Of, but eccentric to
the axis of said shaft. This shaft receives a rotary motion in unison with the other
working parts of the machine; such rotary motion may be given by means of cogs
provided upon its periphery and gearing into a spur wheel U on the driving
shaft Cb, this driving shaft being connected with the shaft Da preferably by means
herein-after explained, inasmuch as there must be one complete operation of the
feed coincident with each descent of the needle, in other words, with each of the
inward and the outward strokes of the shuttle; the teeth of the shaft Of are so
proportioned with reference to the spur wheel U that two complete revolutions of
said shaft Of will occur to one revolution of the shaft Cb, in other words, the revo-
lutions of the shaft Of will correspond in number with those of the shaft Ab, while
those of the shaft Cb coincide in like manner with those of the shaft Da.
It will of course be understood that if the shuttle were employed in making a
stitch during only one of its inward and outward strokes this proportion between
the movements of the shaft Of and the shuttle actuating shaft would not be
required, for in such case the eccentric socket receiving the rear end of the feed
actuating shaft Oc might be provided in the end of the driving shaft Cb, inas-
much as the socket o¹ is eccentric to the axis of the shaft Of it follows that the
rotation of said shaft will carry around the adjacent end of the feed actuating.
shaft Oo, this being permitted by the ball joint provided to said shaft O by
means of the sphere of working in its spherical socket, as herein-before explained.
This motion being transmitted to the feed gives the requisite movement to said
feed, making each of the four motions comprised in said movement clearly distinct
but in suitable relation with the others, and this with little friction and by a very
simple arrangement of parts. To vary the throw of the feed it is necessary to move
the ball joint, herein-before explained, further in one direction or the other from
the centre of the feed actuating shaft Oc, which by changing the ratio in the length
of the two arms of said shaft Oo changes, so to speak, the leverage exerted upon the
feed, and in a corresponding degree changes the throw of the same.
The shaft Da and the driving shaft Cb are connected at their lower ends by
peculiar mechanism constructed as follows:-The adjacent ends of said shaft aro
recessed on the arc of a circle and coincident with the curvature of each recess;
there is formed in the said end of each of said shafts a transverse groove with
parallel sides; Co is a small stem, the ends of which are shaped in a manner corre-
sponding to that of the ends, herein-before described, of the shafts Da and Cb, that
is to say, they are recessed on the arc of a circle, with grooves cut across said ends
in the same direction as the curvature given to their recesses; Ca and Cb are coupling
devices, each one composed of two arcs of circles cd, co, arranged in planes at right
angles to each other. These devices ca, cb, are placed between the adjacent ends
of the stem Ce and the shafts C and Da, the arc ce fitting into grooves in the
adjacent end of the shaft, while the are cd fits into the groove in the adjacent end
of the stem. When the stem is turned in one position with reference to either of
the said shafts one arc will move in the end of said shaft, when turned at right angles
to such position the other are will move in the end of the stem. By this means

page_text: two universal joints are provided, connecting the stem Ce with the end of the
shafts, and ensuring the transmission of motion from the one shaft to the other
without jar, backlash, or concussion, and with perfect certainty of motion.
The seventh part of this Invention relates to that class of sewing machines in
which a rotating shuttle, in other words, a shuttle travelling in a circular or elliptic
path, is employed, and comprises in a sewing machine of this variety a revolving
shutter arranged to move horizontally instead of in a vertical plane, thereby
obviating the drawbacks incident to the construction last indicated.
It further comprises the combination of the rotating shuttle, a horizontal race-
way, and a rotating disc, or its equivalent, giving the requisite circular motion to
the shuttle in due relation with the needle, whereby more uniformity of friction,
and consequently reliability of motion, is secured in the movement of the shuttle
than is possible with one moving in a raceway arranged in a vertical plane.
Also the combination with the rotating disc, or its equivalent, by which circular
motion is given to the shuttle of a central catch or stud, around which the shuttle
thread is caught and looped during a portion of the revolution of the shuttle, and
at the requisite part of such revolution released to provide the slack required in the
formation of the stitch, said catch or stud also providing for the take up of such
Black when the thread is to be tightened in the completion of the stitch.
Also the construction of the aforesaid stud with a sloping surface, whereby at the
requisite point in the revolution of the shuttle the quick release of the shuttle thread
therefrom is greatly facilitated.
The said Invention further comprises a novel combination with a vertical shaft
giving motion to the shuttle moving in a horizontal raceway, and with the hori-
zontal driving shaft of the machine, of an intermediate link connected with the two
shafts aforesaid by universal joints, whereby a positive rotary movement is given
to the disc, or its equivalent, employed in communicating the circular movement
to the shuttle without the friction, backlash, and occasional lost motion, incident to
the use of gearing.
Also a novel combination of a rock shaft having a crank arm connected by a link
with the needle bar, the link being arranged below the axis of motion of the rock
shaft, and the several parts being arranged to depress the needle for the time and in
the manner required for the facial passage of the shuttle through the needle loop
without danger of straining the thread upon the shuttle and retarding the passage
thereof.
It further comprises a horizontal circular raceway constructed with a vertical
groove, receiving the needle as the same descends into the requisite relation with the
rotating shuttle traversing the said raceway, whereby the needle loop is thrown
forward and opened to ensure the passage of the shuttle through the needle loop,
and to enable the shuttle to pass in close proximity to the needle as required in such
transit of the shuttle through said loop.
Also the novel combination of a crank on the driving shaft, an oscillating arm on
the rear of the rock shaft giving motion to the needle bar, and an intermediate
connecting rod, whereby the requisite rocking movement is given to the said rock
shaft from and during the continuous rotation of the driving shaft.
Figure 73 is a side view embracing the features of this part of my Invention ;
Figure 74 is a vertical longitudinal sectional view of one portion of the same.
Figure 75 is a horizontal sectional view of the said machine taken in the line
x, x, of Figure 73; Figure 76 is front view and partial section; and Figure 77 is a
rear view of the same.
Cx is a horizontal driving shaft, actuated by a belt on the pulley C×1, or by other
suitable means. R is the circular raceway in which is placed the travelling shuttle
r, represented more fully in Figures 74, 75, and 76, this raceway being horizontul,
and fixed in any suitable manner to or upon the frame of the machine. At the axis
of the raceway is provided a bearing in which works a short vertical shaft R¹ which
carries at its upper extremity above the raceway R a disc R². On the edge of this
disc R is formed a slot or opening, the rear end of which provides a shoulder

page_text: which bears against the rear end of the shuttle r, so that when a rotary movement
is given to this disc R² a corresponding circular movement is given to the shuttle,
the latter being carried around in the raceway R. It will of course be understood
that an arm radial from the shaft R' and having its end bearing against the rear of
the shuttle after the manner of the shoulder will serve the same purpose as this
disc R. Between the lower end of the shaft R' and the forward end of the driving
shaft C is a link R³. One end of this link is connected by a universal joint with
the lower end of the vertical shaft R', the other end of said link is connected by a
universal joint with the forward extremity of the shaft C* all as represented in
Figure 73. The flexible connection thus provided between the shaft Cx and the
shaft R¹ causes the rotary motion of the former to be transmitted to the latter, and
consequently to the shuttle. Insasmuch as there can be no backlash, rattle, or in-
cidental loss of motion as in the use of cog wheels or gearing, it follows that the
motion of the shaft R', in other words of the shuttle, is coincident and uniform with
that of the shaft Cx. It is also to be observed in this connection that inasmuch
as the raceway R is horizontal the weight of the shuttle rests entirely upon its
under side, and its resistance to the disc R³ or the driving arm equivalent to the
latter is always the same, whereas in a raceway arranged in a vertical plane the
weight of the shuttle is sometimes borne by the raceway, sometimes by the arm
giving motion thereto, its movement being retarded by its weight when passing up
one side of the raceway, and accelerated by the same agency in passing down the
other, thus giving an unequal motion to the shuttle far inferior in its results to that
secured by a shuttle moving in a horizontal raceway as in this part of my present
Invention. Upon the upper end of the shaft R¹ is provided an upwardly extending
stud R. This stud R may be composed of a brush sufficiently rigid to resist the
strain upon the shuttle thread during the greater portion of the doubling or folding
of the thread around the same by the revolution of the shuttle in the raceway, but
at the same time sufficiently flexible to yield to the greater strain brought thereon
as the shuttle approaches the needle, the brush yielding at this point and discharging
or releasing the thread to provide the slack requisite in the formation of the stitch.
As shewn in the Drawings however the said stud R' is of metal, and has the shape
of a cylinder bisected obliquely from its base upwards, giving a sloping surface as
from to the purpose of which will herein-after fully appear. Upon the rear
ond of the driving shaft Cx is a crank arm 8.
Arranged above and parallel with the driving shaft Cx is a rock shaft A*, upon
the rear end of which is a crank arm 8¹. From the crank or wrist a to the crank
arm s¹ extends a rod or pitman S. The rotatory movement of the shaft C* therefore
gives an oscillating or rocking movement to the rock shaft A*. Upon the front end
of the latter is a crank arm b* which connects by a link B* with a pin or pivot 6*1
fixed upon the needle bar B×1, the link B* being below the axis of motion of the
rock shaft A*. Formed in the side of the raceway R, in line with the needle E*,
carried in the usual manner with the needle bar B×¹, is a vertical groove h*, into
which the needle passes in its downward stroke.
The operation of the Invention is as follows:-The uniform circular movement
being given to the shuttle as herein-before explained, simultaneously with this
the movement of the rock shaft bringing the crank arm b* from a more or less
horizontal position to a vertical one, moves downward the needle bar B×1, while
the crank arın * and the link B* are held nearly in line with each other, the
motion given to the needle bar B1 is diminished, the needle bar being motionless
at the point where the said link and crank arm are brought exactly coincident in
position, it follows therefore that the needle bar remains depressed without any
material movement a suitable space of time while the crank arm is passing through
the lower arc of a circle concentric with the axis of motion of the rock shaft. The
needle being thus brought downward into the groove h*, the surface behind the
needle being closely adjacent thereto, throws forward the needle loop open and slack
across the adjacent portion of the raceway R; in other words, open and slack in
front of the shuttle, advancing in the aforesaid raceway. This done, the movement

page_text: given by the shaft R¹ and disc R2 to the shuttle as herein-before explained, brings
said shuttle to, and causes it to pass through the needle loop, the slackness of the
latter preventing any tightening of the loop upon the shuttle, or any retardation of
its movement in passing through said loop. As the shuttle is carried around its
thread is caught upon the vertical or elongated side of the stud R, and as the shuttle
approaches the needle the said thread from the shuttle is as it were doubled, passing
from the stitch previously formed downward around the stud R, and thence back
to the shuttle approaching the needle. As soon as the shuttle has passed through
the needle loop the opposite or sloping surface 22, 23, is turned into such position
that this loop of the shuttle thread is released, no hold being exerted thereon by the
sloping surface aforesaid of the stud R. The said thread is then slackened, as
required in the first stages of the foundation of the stitch, when subsequently the
shuttle thread is again caught upon the vertical side of the stud R+.
Having thus fully described the said Invention as communicated to me by my
foreign correspondent, and the manner of performing the same, I wish it understood
that I claim in a sewing machine,-
The combination of the shafts and the links constructed and arranged, as and for
the purpose herein set forth.
Also in a sewing machine, the driving pulley having its periphery constructed
with alternating spurs and spaces, the spurs forming a V shaped or semicircular
groove for the reception of the driving belt, as and for the purpose herein set
forth.
Also the combination with one or more of the shafts actuating the stitch-forming
devices of a sewing machine, the differential device with its several parts for
operation, as and for the purpose herein set forth.
Also the angular lever and link connected with the crank of the needle operating
shaft and with the needle bar and with the outer end of the arm of the said angular
lever working on a moveable bearing, the whole combined and constructed for use
and operation, as and for the purpose herein set forth.
Also a needle solid at its point but split or divided through its main length
and constructed with a loop above its eye, as and for the purpose herein set forth.
Also a rotary hook constructed with the bridge arranged between the nose
and heel of the hook and with the projection arranged to yield, and with a
circumferential flange at its rear or inner side, as and for the purpose herein set
forth.
Also the bobbin, constructed of a single piece of metal and with a peripherical
opening at one side of its central plane, and with the bobbin retainer arranged upon
the end of the adjustable shaft in combination with the socket or bearing and
bobbin, and arranged to rotate in the same direction as the hook and in relation
with the bobbin, as and for the purpose herein set forth.
Also in combination with the rotating hook of a sewing machine, the brush
arranged to rotate in a direction coincident with that of the hook but with greater
velocity, for the purpose herein set forth.
Also the secondary shaft and its pulley, in combination with a pulley on the
shaft or the rotating bobbin retainer and a connecting belt, as and for the purpose
lierein set forth.
Also the tension device, composed of the two independently moving rods or stems
arranged to act in succession on suitable gripping plates to prolong the tension
upon the thread, the gripping plates being adjustable in relation to each other in
combination with the rod or stem, as and for the purpose herein set forth.
Also the cloth plate having its needle thread made straight from end to end on
the front side, and having an anti-friction roller arranged at the end of the needle
throat in such relation therewith as to receive the contact of the thread, as and for
the purpose herein set forth.
Also a four motion feed, positive in all its motions and adjustable for varying
the length of the stitch and its vertical throw, as and for the purpose herein set
forth.

page_text: Also a feed, supported at both ends by and swinging upon the pivoted links or
arms in combination with the rod and the link, the lever and the devices con-
necting said lever with the feed, as and for the purpose herein set forth.
Also the combination of an adjustable feed with an excentric arranged to give
simultaneous vertical and horizontal movement to said feed, as and for the purpose
herein set forth.
Also in combination with the positively actuated four motion feed and the
excentric actuating the same, the straps concentric with each other upon the
excentric and one within the other, as and for the purpose herein set forth.
Also in combination with the feed the adjustable rod, connected by the link to
the said feed, and the excentric actuating said rod through the strap, the whole
combined and arranged, as and for the purpose herein set forth.
Also the adjustable lever connected by the rod to the feed, in combination with
the strap of the excentric giving movement to the said lever, the whole combined
and arranged as and for the purpose herein set forth.
Also the take-up constructed with the adjustable crank arranged in relation
with the take-up mechanism, as and for the purpose herein set forth.
Also a revolving take-up, constructed and arranged for operation and made
differential in its motion and arranged in relation with the stitch-forming mechanism
and with the plate or disc or both, and with the wheel, as and for the purpose
herein set forth.
Also in combination with the presser bar of a sewing machine, the rock shaft,
constructed at one end with the cam arranged to lift the presser bar, and at the
other end with a lever for turning the said rock shaft, the said parts being arranged
in relation with each other and with the spring for retaining the rock shaft in
either position to which it may be turned, all as and for the purpose herein set
forth.
And in connection with the second part of the said Invention,―
The crank on the needle actuating shaft, the connecting rod working on the
fulcrum, and the universal joint connecting the rod with the bar or shaft arranged
to operate the thread hook on the bar or shaft working on the ball joint, said shaft
being arranged to move the thread hook around the bobbin without itself turning
on its own axis, all as and for the purpose herein set forth.
Also, the bobbin arranged within the fixed receiver or holder and in relation
with the thread hook arranged to move around the said bobbin, and the fixed plate
constructed with the vertical groove, the needle and the thread hook arranged to
move around the bobbin without itself turning on its own axis, all as and for the
purpose herein set forth.
Also the rod working on the ball joint and connected by the universal joint
with the bar or shaft in combination with the feed, as and for the purpose herein
set forth.
Also the pivoted slotted arm or lever connected with the needle bar in combi-
nation with the crank on the shaft as and for the purpose herein set forth.
Also the take-up eye on the pivoted slotted lever actuating the needle bar in
combination with a fixed eye, as and for the purpose herein set forth.
In connection with the third part of the said Invention,-
The combination of the rotating hook, the fixed bobbin frame, and the bobbin
in the bobbin frame, and supported independently of the book, as and for the
purpose herein set forth.
Also the hook, constructed with the shoulder at its front, and the notch behind
its beak in combination with the bobbin, and with the fixed guide, as and for the
purposes herein set forth.
In connection with the fourth part of the said Invention,―
The loaded plunger in combination with the bobbin of a rotating sewing machine
hook, and the bobbin clamp fixed to the rotating hook, and arranged in relation
with the bobbin, and the pivot and spring in combination with the bobbin clamp
the rotating hook and the bobbin, as and for the purpose set forth.

page_text: Also the bobbin shell or case, constructed with the moveable stud, in combination
with the bobbin, having the groove in its internal periphery, the whole arranged
within the rotating hook, as and for the purpose set forth.
Also in a rotating sewing machine hook the bobbin constructed with a central
delivery for its thread.
Also the rotating hook, constructed with the rebate in the back portion of its
periphery, as and for the purpose set forth.
In connection with the fifth part of the said Invention,-
The rock shaft carrying the crank arm connected with the needle bar by the link
situated above the axis of the rock shaft.
Also the crank on the shaft carrying the rotary hook, the secondary crank arm
on the end of the rock shaft having its crank arm connected by the link B, b, with
the needle shaft, and the connecting rod all arranged and operating as and for the
purpose herein set forth.
Also the fixed plate or shoulder arranged in relation with the needle, and with
the hook constructed with the circular recess or chamber in its rear side, the whole
arranged and operating as and for the purposes herein set forth.
In connection with the sixth part of my Invention,―
The rotary crank wrist and the oscillating crank wrists in combination with the
link, the pitinan and needle bar, and the take-up upon the pitman in combination
with an eyelet, all as and for the purpose herein set forth.
Also a shuttle sewing machine in which the needle has two descents to one com-
plete to-and-fro movement of the shuttle, as and for the purpose herein set forth.
Also a double ended shuttle constructed as above specified for the purpose herein
Bet forth.
Also the rod constructed with the joint in combination with the shuttle and
raceway, as and for the purpose herein set forth.
Also the shaft working on a ball joint and arranged to actuate the four-motion
feed, free at one end but suspended at the other from the stirrup, and with a shaft
constructed with a socket excentric to its axis and arranged to operate the four-
motion feed, as and for the purpose herein set forth.
Also the adjustable ball joint composed of a sphere and spherical socket in a lon-
gitudinally adjustable block in combination with the shaft, arranged to actuate the
four-motion feed, whereby the throw of the said feed may be regulated at will, as
herein set forth.
Also in combination with the shaft giving motion to the feed, and that giving
motion to the needle bar, the universal joints, composed of the stem and the coup-
ling devices, the ends of the aforesaid shafts and the ends of the stem being recessed
on the arc of a circle with transverse grooves coincident with the curvature of said
recesses, and receiving the arcs of the devices, ca, cb, all as and for the purpose
herein set forth.
And in connection with the seventh part of the said Invention I claim,—
A revolving shuttle arranged to operate in horizontal plane the horizontal circular
raceway, with or without the vertical groove, and a rotating disc or equivalent
device, the said parts arranged in relation with each other, and with the needle, as
and for the purpose herein set forth.
Also the combination with the rotating disc or equivalent device by which circular
motion is given to the shuttle of the central catch or stud, and the sloping face
arranged in relation to the vertical side of the stud, as and for the purpose herein
set forth.
Also in combination with the vertical shaft from which circular motion is given
to the shuttle in the horizontal raceway, and with the horizontal driving shaft the
intermediate link connected with the aforesaid shafts by universal joints, as and for
the purpose herein set forth.
Also the rock shaft having the crank arm connected by the link with the needle
bar, the link being arranged below the axis of the rock shaft, as and for the purpose
herein set forth.

page_text: Also the combination of the crank on the driving shaft, the oscillating arm on the
rock shaft, and the connecting rod, all arranged and operating, as and for the pur-
pose hercin set forth.
In witness whereof, I, the said William Robert Lake, have hereunto sel my
hand and seal, this Twenty-fourth day of March, in the year of our lord
One thousand eight hundred and seventy-seven.
W. ROB. LAKE. (L.S.)