IMPROVEMENTS IN SEWING MACHINES
Year: 1882

page_text: LETTERS PATENT to William Robert Lake of the Firm of Haseltine Lako
and Co. Patent Agents, Southampton Buildings London for an Invention of
"IMPROVEMENTS IN SEWING MACHINES" A communication from abroad by
the Rotary Shuttle Sewing Machine Company of Foxborough Massachusetts
United States of America
PROVISIONAL SPECIFICATION left by the said William Robert Lake at
the Office of the Commissioners of Patents on the 3rd January 1882.
"
WILLIAM ROBERT LAKE, of the Firm of Haseltine Lake & Co., Patent Agents,
Southampton Buildings, London "IMPROVEMENTS IN SEWING MACHINES"
[A communication from abroad by the Rotary Shuttle Sewing Machine Company
of Foxborough Massachusetts United States of America]
This Invention relates to improvements in sewing machines in which a rotary
shuttle is used and comprises, mechanism for operating the feed mechanism for
operating the needle bar the feed-bar and the presser-foot; mechanism for driving
a continuous rotary shuttle whereby it is made to move at a speed greater at one
part of its travel than at the remaining part; a continuous rotary shuttle having
an elongated eye; a device for deflecting the needle-thread from the path of the
shuttle; mechanism for confining or releasing a continuous rotating shuttle in a
direction at right angles to its path of rotation; an upper and lower feed-bar
the lower feed-bar being arranged to work in one direction from, and with, the
upper feed-bar and in the other direction independently of such upper feed-bar
and by mechanism of its own; a rotary shuttle-carrier constructed to place and
keep the needle in its proper line of movement; and a novel construction of the
race-way for a rotary shuttle-carrier and its shuttle; all substantially as herein-
after described.
In carrying the said Invention into practice I provide a goose-neck standard
which is the support for a horizontal driving shaft having at one end a grooved
driving pulley wheel and a balance wheel, This driving-shaft terminates in a
chambered head of the standard and therein it is provided with two separate

page_text: peripheral cams and a crank-arm having a friction-roll, cach in a separate and
distinct vertical plane. There is a needle bar a presser-bar and an upper feed-bar.
These several bars are located at the chambered head of the standard and they are
there arranged side by side, with the feed-bar, between the needle and presser-bars
each to be moved separately and independently of the others and in a vertical
plane at right-angles to the bed-plate. The needle-bar carries a plate having a
cam-groove which sets over the friction-roll of the crank-arm and thus the needle-
bar is moved up and down as the driving shaft rotates said needle-bar being guided
in such movement by suitable guide-ways of the walls of the chambered head.
The presser-bar is pivoted to a U-shaped frame or tumbler which straddles and
bears against the two opposite sides of the periphery of one of the cams and under
the revolution of this cam operating on one of the legs of the tumbler the presser-
bar is raised and by the cam acting on the other leg of the tumbler the presser bar
is moved in the opposite or downward direction and both of such movements are
in suitable guide-ways in the walls of the chambered head. A spiral spring acts
to hold the presser-bar to the goods being sewed in the usual manner.
The upper feed-bar has a link which at one end is pivotted to it, and at the other
end to the tumbler and it has a slot running in the direction of its length, which
slots sets over a stud carried by a lever arm that turns upon a fulcrum pin of a
horizontal slide-bar and bears against the periphery of one of the cams; a spring
suitably applied to the lever holding it to such bearing.
The upper part of the feed-bar has a slot along its length and by this slot it
slides over a guide-block pivotted to a wall of the chambered-head.
The rotation of the two cams, the one through the tumber and the other through
the lever-arm gives respectively an up and down movement and a forward and
back ward horizontal movement to the feed-bar in relation to the bed-plate the
walls of the chambered head being provided with suitable guide ways to allow of
the same.
The slide-bar hereinbefore referred to, as carrying the fulcrum of the lever-arm,
plays at one end, through a guide-way of the chambered head and at the other end,
a screw-bolt freely enters it; said bolt screws into and through one side of the
chambered head and exteriorly is provided with a milled head for convenience in
turning it. By this arrangement of parts the fulcrum of the lever on the slide bar
and the connection between such lever and the feed-bar are rendered adjustable in
relation to the bearing of such lever against the edge of its cam, and thus the
length of the horizontal movement of the feed-bar, and consequently the movement
of the feed of the material being sewed, can be regulated as desired.
The needle-bar carries the needle which is suitably attached thereto, and this
needle, in its up and down movement, plays through the throat of the cloth-plate
making a part of the bed-plate. The foot-piece of the upper feed-bar is shaped to
pass in its horizontal movement aforesaid to one side of the needle-throat, to wit,
between such throat and the upright part of the standard and to the rear of the
needle-throat in relation to the direction of feed of the goods through the machine,
and its bottom and acting face is preferably serrated or otherwise roughened.
The foot-piece of the presser-bar is shaped to pass to the left of both the foot-
piece of the feed-bar and needle-throat and to the front side of the latter and it is
suitably cut out for the foot-piece of the feed-bar and the needle to move under
the action of their operating mechanism. A horizontal shaft is placed below the
bed-piece with its axial line coincident with the vertical plane of the axial line of
the driving-shaft.
This lower shaft is driven from the driving-shaft by connecting mechanism
consisting of an excentric fixed to the driving shaft and a strap surrounding said
excentric. This excentric strap is a continuation of a connecting rod, and inter-
mediate of its length said rod carries a slide-block on which it turns by a pivot pin,
said block being arranged to play within and along, a vertical guide-groove of the
upright part to the standard, and the direction of this guide-groove is in a vertical
plane coincident with the vertical plane of the axis of the two shafts. This rod of

page_text: the excentric-strap at its lower end, has a stud-pin or friction-roll which projects
into a radial slot of a vertical disc fastened to the lower shaft-The distance
between the axis of the intermediate fulcrum-pin of the connecting rod and the
axis of the excentric strap should be always exactly half of the distance between
the axes of the two straps and the distance between the axis of the lower pin or
stud, and the axis of the intermediate fulcrum-pin should be always less than the
distance between the axis of the such fulcrum-pin and the axis of the excentric
strap.
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This lower shaft at its end opposite to that connected to the driving shaft as
above described, carries a concentric circular disc which rotates with it, and in such
rotation turns within a stationary concentric circular chamber of a block fixed to
the under side of the bed-piece, which chamber is the shuttle-race of the machine.
The outer face of this disc has a fixed block which occupies a portion of its surface
and is shaped to make a rest for the point and heel of a shuttle of a crescent shape
and to leave an open space intermediate of such rests of the shuttle against it, and
between it and the shuttle. This block together with its carrying disc,
shuttle-driver of the machine. The shuttle fits the inner periphery of the circular
chamber or shuttle race and it is carried around the same under the revolution of
the lower shaft and its shuttle-carrier. The shuttle between its point and heel is
chambered in its thickness and in this chamber is a bobbin or spool of thread
turning upon a centre-post of the shuttle and the thread passes from this bobbin
to and under a spring pressure-disc of the shuttle and thence to an eye in the wall
of the chamber of the shuttle, which eye is coincident with the axis of the lower
shaft and thus the shuttle thread is delivered to the action of the needle as will
hereinafter appear, and through the pressure-disc the desired tension of the same is
obtained.
The location of the shuttle and its rotation within and around its race as above
described is such relative to the up and down movement of the needle, under the
action of its bar and mechanisin connected therewith, as described, that its point
which is at the periphery of the shuttle-race will pass above the eye of the needle
and between the needle and its thread when the needle has slightly receded from
its lower most position and thus formed a loop of the thread, and again the
outer face of the block making a part of the shuttle-carrier is situated in such
relation to the up and down movement of the needle as aforesaid that, as it rotates
to carry the shuttle around, it will pass to the right of the needle in its down ward
movement, and as the needle moves downward and passes the same, it will be in
such position relative thereto that in case the needle is out of its proper vertical
line it will then bear against, and press, the same into position for the point of the
shuttle to enter the loop of the shuttle-thread and thus it is positively confined
and held for such operation should the needle in any way, by reason of its being
bent or otherwise, be running in a line out of its proper path relative to the path
of the point of the shuttle. The open end of the shuttle-race is closed to prevent
the escape of the shuttle from it in the rotation of the shuttle within it, by two
arins one of which acts as an under or auxiliary feed-bar to be explained herein-
after. The other arm swings upon a centre pin and it has a spring-catch which
interlocks with a notch of the shuttle-race block when such arm is in its closed
position over the open end of the shuttle-race, and on a release of this spring-
catch this arm can be swung out of position for the removal of the shuttle from
its race.
The under or auxiliary feed-bar making also one of the closing arms to the open
end of the shuttle race as above stated, is secured at its lower end to a horizontal
rocker-shaft which is arranged to rock in bearings of the under extension of the
shuttle-race-block and has a radial arm which at its free end bears against the
periphery or edge of a cam on the lower shaft. The upper end of this under or
auxiliary feed bar, at its working face which preferably is serrated or otherwise
roughened, lies within an opening in the cloth-plate and it may be either flush with,
or project slightly above, said plate, and such working face is shaped to correspond

page_text: to that of the working face of the upper feed-bar as herein described. The under
or auxiliary feed-bar swings forward and backward within given limits within
this opening of the cloth-plate which is of suitable shape and size therefor, and its
forward movement is with, and in consequence of, the similar movement of the upper
feed-bar, and its backward movement because of the action of the cam on the radial
arm, of its rocker shaft.
The outer face of the shuttle-carrier has a raised rib or projecting piece the outer
edge of which runs at an incline thereto and it is otherwise so shaped and situated
between the eye of the shuttle for the delivery of the shuttle-thread and the
periphery of the shuttle race and in such relation to said shuttle eye, that under
the rotation of the carrier it will in no manner interfere with the travel of the
needle and that as it passes around the shuttle thread leading from the shuttle eye
to the needle-throat of the cloth-plate in the making of each stitch will begin to
ride or pass upon it just previous to the entrance of the point of the shuttle
between the needle and its thread or into the needle-loop as herein described and will
continue to so ride upon, and pass over, it, until such point of the shuttle has entered
the needle-loop, when it will drop from the same to the outer face of the shuttle
and thus the shuttle-thread is placed out of, or deflected from, the line of movement
of the shuttle-point at such time and all possibility of interference between it and
the point of the shuttle is obviated and prevented. A button or plate projects
from the front or outer face of the disc making a part of the shuttle-carrier and is
in position to lie against the inner face of the shuttle as it travels around within
its race. The stem or shank of this button enters and passes through the thickness
of the said disc and at its inner end it has a head piece which rests and bears
against the inner face of the shuttle-race and such shank to said button is of
suitable length for the button to have a lateral play relative to the thickness of
said disc. A portion of the said inner face of the shuttle-race against which the
said head to the button bears, in the rotation of the shuttle-carrier has a depression
of suitable shape for it to enter, and the remainder of such inner face along said
line of bearing is flat and in a parallel plane with the vertical plane of rotation of
the shuttle and its carrier.
In the rotation of the shuttle and its carrier, as the head of this button travels
over the flat portion of its bearing face in the shuttle-race, the button is pressed
outwardly against the shuttle which in turn is thereby pressed outwardly against
the arms which close the open end of the shuttle race and as the said head travels
over the depressed portion of its said bearing face the outward pressure of the
button upon and confinement of the shuttle as aforesaid is released and the shuttle
is thus left free to move laterally to a limited extent within its shuttle-race as it
then rotates around and through the same.
The flat and depressed portions of the bearing face for the button-head above
described, are situated in such relation to each other, and to the movement of the
shuttle through its race, that the pressure upon and, confinement of, the shuttle
against the arins, which hold the shuttle against escape from its race, will commence
just previous to the entrance of the shuttle-point into the needle loop in the
making of a stitch as herein described, and continue, till such entrance is effected
and for a short portion of the rotation thereafter but will certainly be released
because of the backward play allowed to the button by the depression, in time for
the needle-thread to freely pass between the inner side of the shuttle and the
contiguous face of the disc to the shuttle-carrier and its button in the continued
rotation of the shuttle. This release of the pressure of the button against the shuttle
continues until the shuttle is again about to enter a needle-loop when it again
occurs and so continues; as before and so on for each rotation of the shuttle.
this means the shuttle is brought and held positively in position relative to the
needle-loop when it is to take such loop and afterward it is given suflicient freedom
of lateral movement in its cace to allow the loop of the needle-thread to pass freely
about and around the shuttle as the shuttle continues to enter it and similarly to
pass freely between the shuttle and its race in its escape therefrom in the after
By

page_text: completion of the stitch by the drawing up of such loop in the running of the
inachine.
I provide a spool from which the needle is supplied with thread. This thread
passes from its spool to and between a horizontal plate and the periphery of a
vertical wheel arranged to turn within a bracket arm. The plate rests upon the
wheel and it is held in contact therewith by the pressure of a spiral spring which
surrounds a post and is adapted by a screw-nut to be adjusted to its pressure upon
the plate and therefore as to the pressure of the plate upon the wheel.
These parts
constitute the tension device of the machine, and by arranging. one of them to
roll or turn as described, there is no possibility of the thread being obstructed
in its passage between them, while, at the same time, the desired restraint or tension
on the thread will be always maintained. From the tension device the needle
thread passes to, and through, a stationary eye and thence under a stationary hook
below such eye, which are upon the chambered head of the standard to and through
an eye at the outer end of an arm that is arranged to swing upon a centre at the
right of said chambered head and to enter by a stud or pin into, and engage with,
a peripheral cam-slot of the driving shaft and from thence to the eye of the needle,
entering the same at the left hand side thereof. This arm acts as a take up or
controller of the needle-thread and its said swing is in a vertical direction between
the said stationary eye and hook and at its said point of suspension and connection
with the cam-slot it is in frictional contact with a plate attached by a set-screw to
the goose neck-standard in proper position therefor. This thread take-up or
controller, through the working of its operating-cain is given an upward and
downward movement. This movement is such in relation to the downward travel
of the needle that its downward movement begins after the needle commences to
move downward and so continues even after the needle has begun to move upward,
and so long as the shuttle in its rotation continues to draw the needle-thread
downward through the eye of the needle and the cloth being sewed when its
upward movement commences and continues ending just after the upward
movement of the needle, when it rests, and again begins its downward movement
after the needle has begun its downward movement, and so on as before. This rest
of said take-up or thread-controller after its upward movement and of the similar
movement of the needle as aforesaid holds the thread running from it to the eye
of the needle under a suitable tension to ensure the proper disposition of such
thread by the needle as the needle enters the cloth for the after taking of the
needle-thread by the point of the shuttle. These movements and rests of said
thread take-up or controller are produced as before stated from the cam-groove.
This groove in its part, for giving the rest to said tako up arm as aforesaid, is
slightly widened as to the diameter of the stud-pin or friction-roll running in it,
so as to allow to said take-up-arin sufficient play in its said operating cam-slot
by moving against its friction holding-plate for it to move downward, even before
the part of the cam-groove which is shaped to produce such movement, has come
into operating position thereon, should there be any increased tension in the needle-
thread on the downward travel of the needle, because of any then increased
thickness in the goods being sewed.
With the connection herein described between the driving and lower shafts, as
the axis of the excentric moves from its highest to its lowest vertical position
relative to the axis of the driving shaft and in either direction of the turn of the
excentric, the axis of the stud approaches the axis of rotation of the lower shaft,
and as the axis of the eccentric moves, from its lowest to its bighest vertical position,
relative to the axis of the driving shaft and in either direction of the turn of the
excentric, the axis of said stud recedes or moves away from the axis of rotation of
the lower shaft and such radial distance is the greatest when the axis of the
excentric and of the stud are in their highest position, which is when they are in a
vertical line coincident with the vertical line of the axis of the driving and lower
shafts and from such greatest radial distance the radial distance gradually diminishes
in whichever direction the excentric is turned until the axis of the stud reaches the

page_text: horizontal plane of the axis of the lower shaft, when such axis of the stud is nearly
at its shortest radial distance and, from that time, it slightly decreases such relative
radial distance, in the continued rotation of the lower shaft, until the axis of the
stud reaches its lowermost position, when as it moves upward to the horizontal
plane of the axis of the lower-shaft, it begins to slightly recede from the axis of
the lower shaft and thus to increase its radial distance therefrom and it so continues,
until the axis of the stud roaches its greatest radial distance aforesaid, when on a
continued rotation of the lower shaft, the axis of the stud again begins to approach
the axis of such rotation and so on as before
Thus it is obvious that the axis of the stud in passing through the part of its
travel, which is above the horizontal plane of the axis of rotation of the lower shaft
describes or passes through a circular line of greater length than in the part of its
travel which is below the said horizontal plane, and again in said two parts of its
travel, the leverage upon the lower shaft is the longest in the first, and the shortest,
in the second instance, causing in the second instance a quicker movement of
rotation of the lower shaft about its axis of rotation than in the first instance, while
the travel of the axis of the excentric about the axis of rotation of the driving
shaft as to such part of rotation of the lower shaft is the same then, as to all portions
of it, as it is in the other part of the rotation of the lower shaft.
In this sewing-machine this action of the connection between the driving and
the lower shafts, as above described, by means of a suitable location of the shuttle
and its carrier upon the lower shaft relative to the portion of the rotation of the
lower shaft about its axis which has the quickest movement as aforesaid, and by
means of the operation of the needle under the action of the driving-shaft and
connecting mechanism as aforesaid relative to and across the plane of rotation of
the shuttle, is caused to impart such increased quickness of movement to the rotary
travel of the shuttle from or about the time the point of the shuttle enters between
the needle and its thread and begins to pull such needle-thrend downward and to
thus draw and place it about and around the shuttle until the shuttle has reached
the position on its travel when such loop of the needle-thread begins toe scape from
or leave the shuttle, all of which occupies one half part or thereabouts of the whole
rotation of the shuttle.
By this means the taking of the needle-thread by, and its escape from, the shuttle
are hastened relative to the operation of the needle and of the thread take-up or
controller and to other movements in connection with the making of the stitch by
the needle and shuttle threads and thus the shuttle is made to perform its part in
the making of the stitch in the quickest possible time, increasing the opportunity
of the needle, the thread take-up or controller, and the other portions of the stitch-
making mechanism to complete the stitch as well as leaving them to their own
separate and combined operations in that regard, for a greater portion of the
revolution of the driving-shaft than they would have, if a connection and an effect
therefrom upon the rotation of the shuttle such as abovo described, were not
employed and obtained.
In the several movements above described, the rod which connects the excentric
strap and moves by a stud or friction-roll in and out of the radial slot of the
rotating disc of the lower shaft, slides by its block up and down within the guide-
groove therefor. This slide-block is made in three parts. Two of these parts are
cut out to embrace opposite sides of the pivotal-pin of the excentric-rod and one,
by its outer edge, fits the wall of its way or groove and the other at and along its
outer edge tapers or is of wedge shape from end to end, and there receives the
remaining part which along its edgo in contact with the tapered edge of the last
part tapers also or is of wedge shape in its length, and along its other edge is
straight to fit the wall of the slide-way or groove for such block and has a beaded
set-screw that passes through a slot running lengthwise of it and is countersunk
therein and so fastens it to its adjoining part. This construction of the slide-block
enables it to be adjusted to its bearing along the walls of its guide-way or groove
to compensate for its wear and the wear of its said bearing, by simply unloosening

page_text: the set-screw and then forcing the the outer wedge part in the proper direction
therefor, and afterwards tightening up said screw.
The eye of the shuttle, at which the thread passes from the shuttle, in the making
of the stitch, and which, as before stated, is at the axis of rotation of the shuttle, is
elongated from said axis and in the line of such rotation of the shuttle, but in the
opposite direction thereto that is toward the heel of the shuttle. When, in the
rotation of the shuttle, its point is passing into and through the needle-loop, the
shuttle-thread is passing out of the shuttle-eye at the axis of rotation of the shuttle,
which is in line with one end of its elongated eye and as the shuttle continues its
rotation, such thread works from such end toward and finally reaches the other
end of the eye at or about the time the loop of the needle-thread is escaping from
the shuttle owing to the upward movement of the needle and it is then drawn up
with the loop of the needle-thread by the then upward movement of the take up
or controller of the needle-thread to complete the stitch.
By this means under the rotation of the shuttle, the shuttle-thread, between the
eye of the shuttle and the cloth being sewed at the time, the needle loop begins to
draw off as aforesaid from the shuttle, has a length greater than the distance
between the cloth being sewed and the end of the elongated shuttle eye, which is
then uppermost and the nearer thereto, and this increase in length of the shuttle-
thread over the distance then between such end of the shuttle-eye and the cloth
being sewed, equals in substance, the length of the elongated eye from end to end,
or in other words the distance which such end of the shuttle-eye is to the rear of
that end of the shuttle-eye which is coincident or in line with the axis of rotation
of the shuttle. Thus the shuttle-thread is given a slack for the loop of the needle-
thread to handle as it is drawn up by its take-up or thread controller to complete
the stitch and consequently the needle-thread of itself, at such time, has no labor or
strain upon it, so far as the shuttle-thread is concerned, which obviously, it would
have, were not the shuttle eye so elongated, and the necessary supply of the
shuttle-thread been previously given out to the needle-loop as has been described.
By the location of the shuttle-eye at the axis of rotation of the shuttle it obviously
is always at the same distance from the cloth as it is sewed, and if not elongated as
has been herein described the shuttle-thread passing through it to the cloth would
at all times be taut and when required to complete the stitch would have to be
drawn off the shuttle, bobbin against the tension-device of the shuttle by the
needle-thread itself as it is drawn up by its take-up and controller
Also the location of the shuttle-eye at the axis of rotation of the shuttle is
important, in itself, for, if otherwise placed, that is, at either side of such axis there
would be no control of the shuttle-thread for perfect stitching which obviously
would make it impracticable and while with the shuttle-eye located at the axis of
rotation of the shuttle, the shuttle thread could be drawn off to advantage from its
bobbin, directly and only through the upward pull upon it of the needle loop, as it
is drawn by its take-up or thread-controller as described; still the elongation of the
shuttle eye which has been described is very essential for the reasons which have
been given and for the further reason, that it enables the requisite amount of slack
in the shuttle-thread to be obtained at, and only at, the time it is needed.
This operation upon the shuttle-thread because of the axial and elongated shuttle-
eye secures a perfect lock-stitch and thus an elastic seam.
The under auxiliary feed-bar as before stated, works in one direction with the
forward movement of the upper feed-bar and in this manner the goods being sewed
are gripped between the two and thus under the action of the mechanism provided
for operating the upper feed-bar their feed of the goods is rendered most positive
and sure.
In this forward feed of the goods, the under or auxiliary feed-bar is entirely free
to move with the upper feed-bar and the goods, and the upper feed-bar has no
resistance of any kind except the weight of the under or auxiliary feed-bar and
the resistance incidental to the weight of the goods to overcome, all of which
obviously is slight and as the backward movement of the under feed bar is by and

page_text: through a revolving cam, such movement is obviously secured in a positive manner,
and can be graduated as to its quickness as may be desired, by suitably shaping the
said cam therefor
As to this feed of the goods by the upper and lower feed-bars, the operation
thereof proceeds from the driving shaft and its cams through the connection
between them and the upper feed-bar and the arrangements of this mechanism is
such relative to the mechanism for operating the presser-foot that when the upper
feed-bar is gripping the goods between it and the lower or auxiliary feed-bar
(which preferably is arranged so as to then be in a line directly under the upper
feed-bar, and is feeding them forward, the presser-foot will be lifted from contact
with or pressure upon the goods and vice versa. And again this operation of the
feed is arranged to occur in proper relation to the travel of the needle and other
parts of the machine by which the stitch is formed as is well known in all sewing
machines.
It is plain from this description that while three elements, to wit an upper feed-
bar, a presser-foot, and a needle are all worked from a common driving shaft, they
are severally operated by mechanism from such shaft which acts in itself inde-
pendently upon its respective parts and the movement of any one is in no sense
dependent upon the movement of either or both of the others
Otherwise than has been herein particularly specified the sewing machine herein
described works in all respects substantially similarly to other machines of a
similar kind and therefore it is not deemed necessary to herein particularly explain
the same in such respects as they are obvious to all conversant with the running
and operation of sewing machines.

page_text: Figure 22 is a horizontal transverse section on the line 22-22, Figure 21,
showing also in section the shuttle-carrier and shuttle.
A represents the bed-plate of the sewing machine, having a goose-neck standard B
which is the support for a horizontal driving-shaft C having at one end, a grooved
driving pulley D and a balance wheel E. This driving-shaft C terminates within
a chambered head F on the standard B, and therein it is provided with two
separate peripheral cams G, H, and a crank-arm K having a friction-roller a each in
a separate and distinct vertical plane. L is a needle-bar, Ma presser-bar, and N
an upper feed-bar. These several bars are located at the chambered head F of the
standard B and are there arranged side by side, with the feed-bar between the
needle-bar and presser-bar, each to be moved separately and independently of the
others and in a vertical plane at right angles to the bed-plate. The needle-bar L
carries a plate having a cam-groove b into which fits the friction-roller a of the
crank-armi K, and thus the needle-bar is moved up and down as the driving-shaft
rotates the said needle-bar being guided in such movement by suitable guide-ways
in the walls of the chambered head F. The presser-bar M is pivoted at c to a
U-shaped frame or tumbler O which straddles, and bears against the two opposite
sides of the periphery of the cam G by the revolution of this cam operating on one
of the legs of the tumbler O, the presser-bar is raised, and, by the can acting on
the other leg of the tumbler, the presser-bar is moved in the opposito or downward
direction and both of such movements take place within suitable guide-ways in
the walls of the chambered head. A spiral spring d acts to hold the presser-bar to
the goods being sewed, in the usual manner.
The feed-bar N has a link f which at one end is pivoted to it, and at the other
end to the tumbler O, and it has a slot in the direction of its length, which slot
fits over a stud k carried by a lever-arm P; this lever arm turns upon a fulcrum
pin of a horizontal slide-bar Q and bears against the periphery of the cam Ha
spring m suitably applied to the lever P holding it to such bearing. The upper
part of the feed-bar N has a slot n along its length and by this slot it slides over a
guide-block o pivoted to a wall of the chambered head F.
The rotation of the cams G, IT, the one G through the tumbler O and the other H
through the lever-arm P, gives respectively an up-and-down movement and a
forward-and-backward horizontal movement to the feed-bar in relation to tho
bed-plate A the walls of the chambered head F being provided with suitable guide-
ways to allow of the same.
The slide-bar Q, herein before referred to as carrying the fulcrum of the lever-
arm P plays at one end through a guide-way p in the chambered-head F and at
the other end a screw bolt q freely enters it the said bolt q screws into and through
one side of the chambered head and exteriorly is provided with a milled head for
convenience in turning it. By this arrangement of parts, the fulcrum of the lever
on the slide-bar Qand the connection between such lever and the feed-bar are
rendered adjustable in relation to the bearing of such lever against the edge of its
cam H, and thus the length of the horizontal movement of the feed-bar and
consequently the feed of the material being sewed can be regulated as desired.
The needle-bar carries the needle which is suitably attached thereto, and this
needle, in its up and down movement, plays through the throat 8 of the cloth-
plate R forming a part of the bed-plate. The foot-piece S of the upper feed-bar N
is shaped to pass, in its aforesaid horizontal movement, to one side of the needle-
throat, that is to say, between such throat and the upright part of the standard B,
and to the rear of the needle-throat in relation to the direction of feed of the goods
through the machine (as indicated by the arrow in Figure 9) and its bottom and
acting face is preferably serrated or otherwise roughened.
The foot-piece T of the presser-bar M is shaped to pass to the left of both the
foot-pieces of the feed-bar and the needle-throat & and to the front side of the
latter, and it is suitably cut to allow the foot piece of the feed-bar and the needle
to move under the action of their operating mechanism. U is a horizontal shaft

page_text: placed below the bed-plate A with its axial line coincident with the vertical plane
of the axial line of the driving shaft.
This lower shaft U is driven from the driving-shaft C by connecting mechanism
comprising an excentric V fixed to the driving shaft and a strap W surrounding
the said excentric. This excentrio strap W is a continuation of a connecting
rod X and intermediate of its length the said rod carries a slide block t on which
it turns by a pivot u the said block being arranged to play within and along a
vertical guide-groove in the upright part of the standard B, and the direction of
this guide-groove is in a vertical plane coincident with the vertical plane of the
axis of the two shafts. This rod of the excentric-strap, at its lower end, has a stud
pin w and a friction-roller which project into a radial-slot of a vertical disc Y
fastened to the lower shaft U. The distance between the axis of the intermediate
fulerun pin u of the connecting rod X and the axis of the excentric strap W should
be always exactly half of the distance between the axes of the two shafts CU
and the distance between the axis of the lower pin or stud w and the axis of the
intermediate fulcrum pin u should be always less than the distance between the
axis of such fulcrum pin u and the axis of the oxcentric strap W.
This lower-shaft, at its end opposito to that connected to the driving shaft, as
above described, carries a concentric circular disc Z, which rotates with it and in
such rotation turns within a stationary concentric circular chamber A' of the
block 132 fixed to the under-side of the bed-plate, which chamber is the shuttle-race
of the machine. The outer face of this disc Z has a fixed block C which occupies
a portion of its surface and is shaped to make a rest for the point y and heel of a
shuttle D having a crescent shape, and to leave an open space a intermediate of
such rests for the shuttle against it, and between it and the shuttle. The block C
together with its carrying disc Z is the shuttle-driver of the machine. The shuttle
De fits the inner periphery of the circular chamber or shuttle-race A and it is
carried around the same by the revolution of the lower-shaft U and its shuttle-
carrier C. The shuttle, between its point and heel, is chambered in its thickness
and in this chamber is a bobbin or spool of thread 6 turning upon a centre-post c
of the shuttle, and the thread passes from this bobbin to and under a spring
pressure-disc d of the shuttle, and thence to an eye f in the wall of the chamber
of the shuttle, which eye is coincident with the axis of the lower-shaft, and thus
the shuttle-thread is delivered to the action of the needle, as will hereinafter appear,
and through the pressure-disc d² the desired tension on the same is obtained.
The location of the shuttle and its rotation within and around its race, as above
described, is such, relative to the up and down movement of the needle under the
action of its bar L and mechanism connected therewith as described, that its point,
which is at the periphery of the shuttle-race, will pass above the eye of the needle
and between the needle and its thread, when the needle has slightly receded from
its lowerinost position and thus formed a loop of the thread and again the outer
face of the block C making a part of the shuttle-carrier is situated in such relation
to the up and down movement of the needle as aforesaid, that, as it rotates to
carry the shuttle around, it will pass to the right of the needle in its downward
movement and as the needle noves downward and passes the same, it will be in
such position relative thereto, that, in case the needle is out of its proper vertical
line, it will then bear against and press the same into position for the point of the
shuttle to enter the loop of the shuttle-thread, and thus it is positively confined and
held for such operation should the needle by reason of its being bent or otherwise,
be running in a line out of its proper path relative to the path of the point of the
shuttle. The open end E2 of the shuttle-race A2 is closed to prevent the escape of
the shuttle from it in the rotation of the shuttle within it, by two arms F G² one
of which Facts as a lower or auxiliary feed-bar, to be explained hereinafter. The
other arm G swings upon a centre-pin g and it has a spring-catch which
interlocks with a notch in the shuttle-race block B when such arm is in its closed
position over the open end of the shuttle-race, and on the release of this spring-

page_text: catch
this arm can be swung out of position for the removal of the shuttle from
its race.
The under or auxiliary feed-bar F making also one of the closing arms to the
open end of the shuttle-race A as above stated, is secured, at its lower end, to a
horizontal rock-shaft H2 which is arranged to rock in bearings in the under
extension of the shuttle-race block B2 and has a radial-arm 12 which, at its free end
bears against the periphery or edge of the cam J2 on the lower shaft. The upper
end of this under or auxiliary feed-bar, at its working face, which preferably is
serrated or otherwise roughened, lies within an opening j2 in the cloth-plate, and it
may be either flush with or project slightly above the said plate, and such working
face is shaped to correspond to that of the working-face of the upper feed-bar as
herein described. The under or auxiliary feed-bar swings forward and backward,
within given limits, within this opening of the cloth-plate, which is of suitable
shape and size therefor; its forward movement is with and in consequence of the
similar movement of the upper feed-bar, and its backward movement is caused by
the action of the cam J2 on the radial arm I of its rock-shaft H².
The outer-face of the shuttle-carrier C has a raised rib or projecting piece the
outer edge of which runs at an incline thereto, and it is otherwise so shaped and
situated, between the eye f" of the shuttle D2 for the delivery of the shuttle-thread,
and the periphery of the shuttle-race, and in such relation to the said shuttle-eye,
that, under the rotation of the carrier, it will in no manner interfere with the
travel of the needle, and that as it rotates, the shuttle-thread leading from the
shuttle-eye to the needle-throat of the cloth-plate, in the making of each stitch,
will begin to ride or pass upon it just previous to the entrance of the point of the
shuttle between the needle and its thread, or into the needle-loop, as herein
described, and will continue to so ride upon and pass over it until such point of
the shuttle has entered the needle-loop, when it will drop from the same to the
outer face of the shuttle, and thus the shuttle-thread is placed out of, or deflected
from, the line of movement of the shuttle-point at such time, and all possibility of
interference between it and the point of the shuttle is obviated and prevented. 12² is
a button or plate, which projects from the front or outer face of the disc Z making
a part of the shuttle-carrier, and is in position to lie against the inner face of the
shuttle as it is rotated within its race. The stem or shank m² of this button /²
enters and passes through the thickness of the said disc and at its inner end it has
a head piece n which rests and bears against the inner face of the shuttle-race,
and such shank of the said button is of suitable length for the button to have a
lateral play relative to the thickness of the said disc. A portion of the said inner
face of the shuttle-race, against which the said head n² of the button 12 bears in
the rotation of the shuttle-carrier, has a depression o² of suitable shape for it to
enter, and the remainder of such inner face along the said line of bearing is flat
and in a parallel plane with the vertical plane of rotation of the shuttle and its
carrier.
In the rotation of the shuttle and its carrier, as the head of this button travels
over the flat portion of its bearing face in the shuttle-race, the button is pressed
outwardly against the shuttle, which, in turn, is thereby pressed outwardly against
the arms F G which close the open end of the shuttle-race, and, as the said head
travels over the depressed portion of its said bearing-face, the outward pressure of
the button upon and confinement of the shuttle as aforesaid, is released, and the
shuttle is thus left free to move laterally to a limited extent within its shuttle-race
as it then rotates around and through the saine.
The flat and depressed portions of the bearing-face for the button-head n² above
described, are situated in such relation to each other, and to the movement of the
shuttle through its race, that the pressure upon and confinement of the shuttle,
against the arms which hold the shuttle against escape from its race, will commence
just previous to the entrance of the shuttle-point into the needle-loop in the
making of a stitch, as herein described, and continue, till such entrance is effected

page_text: and for a short portion of the rotation thereafter, but will certainly be released,
because of the backward play allowed to the button by the depression o' in time
for the needle-thread to freely pass between the inner side of the shuttle and the
contiguous face of the disc Z of the shuttle-carrier and its button in the continued
rotation of the shuttle. This release of the pressure of the button against the
shuttle continues until the shuttle is again about to enter a needle-loop, when it
again occurs and continues as before, and so on for each rotation of the shuttle.
By this means the shuttle is brought and and held firmly in position, relative to
the needle-loop, when it is to take such loop, and afterwards it is given sufficient
freedom of lateral movement in its race, to allow the loop of the needle-thread to
pass freely about and around the shuttle, as the shuttle continues to enter it and
similarly to pass freely between the shuttle and its race in its escape therefrom
on the completion of the stitch, by the drawing up of such loop in the running of
the machine.
K is the spool from which tho needle is supplied with thread. This thread
passes from its spool to and between a horizontal-plate p and the periphery of a
vertical-wheel q arranged to turn within the bracket-arm B. The plate p² rests
upon the wheel and it is held in contact therewith by the pressure of a spiral-
spring which surrounds a post s² and is adapted by means of a screw-nut 2 to be
adjusted as to the pressure upon the plate and therefore as the pressure of the plate
upon the wheel. These parts constitute the tension-device of the machine and,
by arranging one of then to roll or turn as described, there is no possibility of the
thread being obstructed in its passage between them, while, at the same time, the
desired restraint or tension on the thread will be always maintained. From the
tension-device, the needle thread passes to and through a stationary-eye u² and
thence under a stationary hook v below such eye (which eye and hook are upon
the chambered head of the standard B) to and through an eye w² at the outer
end of an arm L, which is arranged to swing upon a centre on the right of the
said chambered head F and to enter, by a stud or pin y, and engage with a
peripheral cam slot 2 of the driving shaft C; and from the eye the thread
passes to the eye of the needle entering the same at the left hand side thereof.
This arm L acts as a take up or controller of the needle-thread and its swing is in
a vertical direction between the said stationary eye u² and the hook and at its
said point of suspension and connection with the cam-slot it is in frictional
contact with a plate M2 attached by a set-screw a³ to the goose-neck standard B in
proper position therefor. This thread take-up or controller through the working
This move-
of its operating cam is given an upward and downward movement.
ment is such, in relation to the downward travel of the needle, that its downward
movement begins after the needle commences to move downward, and so continues
even after the needle has begun to move upward, and so long as the shuttle in its
rotation continues to draw the needle-thread downward through the eye of the
needle and through the cloth being sewed, when its upward movement commences
and continues ending just after the upward movement of the needle, when it rests,
and again begins its downward movement after the needle has begun its downward
movement and so on as before. This rest of the said take-up or thread-controller,
after its upward movement and the similar movement of the needle as aforesaid,
holds the thread running from it to the eye of the needle under a suitable tension
to ensure the proper disposition of such thread by the needle, as the needle enters
the cloth, for the subsequent taking of the needle-thread by the point of the shuttle.
These movements and rests of the said thread take-up or controller are produced
as before stated by the cam-groove. This groove, in its part for giving the rest
to the said take-up arın, as aforesaid, is slightly widened as to the diameter of the
stud-pin or friction-roller y running in it, so as to allow the said take-up arm
sufficient play in its said operating cam-slot Z by moving against its friction-
holding plate M² for it to move downward even before the part of the cam-groove
which is shaped to produce such movement has come into operating position thereon,

page_text: should there be any increased tension in the needle-thread on the downward travel
of the needle because of any increased thickness in the goods being sewed.
With the connection herein described between the driving and lower shafts CU
as the axis of the excentric V moves from its highest to its lowest vertical position
relative to the axis of the driving-shaft, and in either direction of the turn of the
excentric, the axis of the stud w approaches the axis of rotation of the lower shaft,
and as the axis of the excentric moves from its lowest to its highest vertical position
relative to the axis of the driving-shaft, and in either direction of the turn of the
excentric the axis of the said stud recedes or moves away from the axis of rotation
of the lower shaft, and such radial distance is the greatest, when the axis of the
excentric and of the stud are in their highest position, which is when they are in
a vertical line coincident with the vertical lino of the axis of the driving and
lower shafts and from such greatest radial distance, the radial distance gradually
diminishes, in whichever direction the excentric is turned, until the axis of the stud
reaches the horizontal plane of the axis of the lower shaft, when such axis of the
stud is nearly at its shortest radial distance, and, from that time, it slightly
decreases sucli relative radial distance, in the continued rotation of the lower shaft,
until the axis of the stud reaches its lowermost position, when, as it moves upward
to the horizontal plane of the axis of the lower shaft, it begins to slightly recede
from the axis of the lower shaft and thus to increase its radial distance therefrom,
and it so continues until the axis of the stud reaches its greatest radial distance
aforesaid, when, on a continued rotation of the lower shaft, the axis of the stud
again begins to approach the axis of such rotation and so on as before.
Thus it is obvious that the axis of the stud, in passing through the part of its
travel which is above the horizontal plane of the axis of rotation of the lower
shaft describes or passes through a circular line of greater length than in the part
of its travel which is below the said horizontal plane, and again in the said two
parts of its travel, the leverage upon the lower shaft is the longest in the first
instance, and the shortest in the second instance, causing in the second instance a
quicker movement of rotation of the lower shaft about its axis of rotation than in
the first instance, while the travel of the axis of the excentric about the axis of
rotation of the driving shaft, as to such part of rotation of the lower shaft, is the
same then as to all portions of it, as it is in the other part of the rotation of the
lower shaft.
In this sewing-machine this action of the connection between the driving and
the lower shafts, as above described, by means of a suitable location of the shuttle
and its carrier upon the lower shaft relative to the portion of the rotation of the
lower shaft about its axis, which has the quickest movement as aforesaid, and by
means of the operation of the needle under the action of the driving-shaft and
connecting mechanism, as aforesaid, relative to and across the plane of rotation of
the shuttle, is caused to impart such increased quickness of movement to the rotary
travel of the shuttle, from or about the time the point of the shuttle enters
between the needle and its thread, and begins to pull such needle-thread downward
and to thus draw and place it about and around the shuttle, until the shuttle has
reached the position on its travel when such loop of the needle-thread begins to
escape from or leave the shuttle, all of which occupies one half part or thereabouts
of the whole rotation of the shuttle.
By this means the taking of the needle-thread by, and its escape from, the
shuttle are hastened relative to the operation of the needle and of the thread
take-up or controller L and to other movements in connection with the making
of the stitch by the needle and shuttle threads, and thus the shuttle is made to
perform its part in the making of the stitch in the quickest possible time, increasing
the opportunity of the needle, the thread take-up or controller L2 and the other
portions of the stitch-making mechanism, to complete the stitch, as well as leaving
them to their own separate and combined operations in that regard, for a greater
portion of the revolution of the driving-shaft than they would have if a connection

page_text: and an effect therefrom upon the rotation of the shuttle, such as above described
were not employed and obtained.
In the several movements above described, the rod, which connects the excentric
strap W and moves by means of a stud wand friction-roller to and fro in the radial
slot a of the rotating disc of the lower shaft, slides by its block t up and down
within the guide-groove therefor. This slide-block t (see Figure 3) is made in
three parts. Two of these parts are cut as at a to embrace opposite sides of the
pivotal-pin u of the excentric-rod X; and one part 6 by its outer edge c' fits the
wall of its way or groove and the other part d' at and along its outer edge f* is
tapered or of wedge-shape from end to end and there receives the remaining part g
which along its edge in contact with the tapered edge of the part d' is also
tapered or of wedge-shape in its length, and along its other edge is straight to
fit the wall of the slide-way or groove v for such block, and has a beaded set-screw /*
which passes through a slot running lengthwise of it, and is countersunk therein
and so fastens it to its adjaining part. This construction of the slide-block t
enables it to be adjusted to its bearing along the walls of its guide-way or groove
to compensate for its wear, and the wear of the said bearing surfaces, by simply
loosening the set screw and then forcing the outer wedge part in the proper
direction therefor and afterwards tightening up the said screw.
The eye of the shuttle, at which the thread passes from the shuttle in the
making of the stitch, and which as beforo stated, is at the axis of rotation of the
shuttle, is elongated from the said axis and in the line of such rotation of the
shuttle, but in the opposite direction thereto, that is to say, toward the heel of
the shuttle. When, in the rotation of the shuttle, its point is passing into and
through the needle-loop, the shuttle-thread is passing out of the shuttle-eye at the
axis of rotation of tho shuttle, which is in line with one end of its elongated eye,
and, as the shuttle continues its rotation, the thread works from such end toward,
and finally reaches, the other end of the eye, at or about the time the loop of the
needle-thread is escaping from the shuttle, owing to the upward movement of the
needle, and it is then drawn up with the loop of the needle-thread by the then
upward movement of the take-up or controller of the needle-thread to complete the
stitch.
By this means, under the rotation of the shuttle, the shuttle-thread, between the
eye of the shuttle and the cloth being sewed, at the time the needle-loop begins to
draw off as aforesaid, from the shuttle, has a length greater than the distance
between the cloth being sewed and the end of the elongated shuttle-eye, which is
then uppermost and the nearer thereto, and this increase in length of the shuttle-
thread over the distance then between such end of the shuttle-eye and the cloth
being sewed is practically equal to the length of the elongated eye from end to end,
or in other words, the distance which such end of the shuttle-eye is to the rear of
that end of the shuttle-eye which is coincident or in line with the axis of rotation
of the shuttle. Thus the shuttle-thread is given a slack for the loop of the needle-
thread to handle as it is drawn up by its take-up or thread controller to complete
the stitch, and consequently the needle-thread, of itself, at such time has no labor
or strain upon it, so far as the shuttle-thread is concerned, which obviously it would
have, were not the shuttle-eye so elongated, and had not the necessary supply of
the shuttle-thread been previously given out to the needle-loop, as has been
described. By the location of the shuttle-eye at the axis of rotation of the shuttle,
it, obviously is always at the same distance from the cloth as it is sewed and if not
elongated as has been herein described the shuttle-thread passing through it to the
cloth would at all times be taut, and when required to complete the stitch, would
have to be drawn off the shuttle-bobbin against the tension-device of the shuttle,
by the needle-thread itself as it is drawn up by its take-up and controller.
Also the location of the shuttle-eye at the axis of rotation of the shuttle is
important, in itself, for, if, otherwise placed, that is, at either side of such axis, there
would be no control of the shuttle-thread for perfect stitching, which obviously
would make it impracticable, and while with the shuttle-eye located at the axis of

page_text: rotation of the shuttle, the shuttle-thread could be drawn off to advantage from its
bobbin, directly and only through the upward pull upon it of the needle-loop, as it
is drawn by its take-up or thread-controller as described still the elongation of the
shuttle-eye which has been described is very essential, for the reasons which have
been given and for the further reason, that it enables the requisite amount of slack
in the shuttle-thread to be obtained at, and only at, the time it is needed.
This operation upon the shuttle-thread because of the axial and elongated
shuttle-eye secures a perfect lock-stitch and thus an elastic seam.
The under auxiliary feed-bar as before stated works in one direction with the
forward movement of the upper feed-bar and in this manner, the goods being
sewed, are gripped between the two and thus, under the action of the mechanism
provided for operating the upper feed-bar, their feed of the goods is rendered most
positive and sure.
In this forward feed of the goods, the under or auxiliary feed-bar is entirely free
to move with the upper feed-bar and the goods, and the upper feed-bar has no
resistance of any kind, except the weight of the under or auxiliary feed-bar and
the resistance incidental to the weight of the goods, to overcome, all of which
obviously is slight, and, as the backward movement of the under feod-bar is by
and through a revolving cam J2, such movement is obviously secured in a positive
manner, and can be graduated as to its quickness as may be desired, by suitably
shaping the cam J² therefor.
As to this feed of the goods by the upper and lower feed-bars, the operation
thereof proceeds from the driving shaft and its cams G H through the con-
nection between them and the upper feed-bar, and the arrangement of this
mechanism is such, relative to the mechanism for operating the presser-foot that,
when the upper feed-bar is gripping the goods between it and the lower or
auxiliary feed-bar (which preferably is arranged so as to then be in a line directly
under the upper feed-bar) and is feeding them forward, the presser-foot will be
lifted from contact with or pressure upon the goods and vice versa. And again
this operation of the feed is arranged to occur in proper relation to the travel of
the needle and other parts of the machine by which the stitch is formed as is well
known in all sewing machines.
It is plain from this description that while three elements viz. :-An upper feed-
bar, a presser-foot, and a needle are all worked from a common driving shaft, they
are severally operated by mechanism from such shaft, which acts in itself
independently upon its respective parts, and the movement of any one is in no
sense dependent upon the movement of either or both of the others.
Otherwise than has been herein particularly specified the sewing machine herein
described works in all respects substantially similarly to other machines of a similar
kind and therefore it is not deemed necessary to herein particularly explain the
same in such respects, as they are obvious to all conversant with the running and
operation of sewing machines.
Having thus fully described the said Invention as communicated to me by my
foreign correspondents and the manner of performing the same I wish it understood
that I Claim
:-
First The combination, with the upper feed-bar, the cams G H and the driving
shaft, of the U-shaped tumbler embracing the cam G, the lever P, and the spring m,
all constructed and arranged to operate the feed-bar substantially as, and for the
purpose, described.
Second: The combination with the presser-bar the cam G, and the driving
shaft, of the U-shaped tumbler fulcrummed in the presser-bar and embracing the
said can, and the spring d, all constructed and arranged substantially as, and for
the purpose, specified.
Third The combination of the upper feed-bar, the presser-bar, the needle-bar
having the slotted cam b, the cams G H, crank-arin K, driving shaft C, tumbler O,
lever-arm P, and springs d, m, all constructed, arranged, and connected to the said
bars substantially as and for the purposes, described.

page_text: Fourth-The combination, with a continuously rotating shuttle-carrier and
shuttle, of a block t in parts as described, a guide-way on the standard D, and a
connecting-rod X having a fulcrum on the block and a strap W encircling the
excentric V upon the driving shaft and arranged to move in a radial slot x of the
rotating shaft U, all substantially as, and for the purpose, described.
Fifth The continuously rotating shuttle having an elongated eye, one end of
which eye is coincident with the axis of rotation of the shuttle and the other end
is toward the heel of the shuttle, substantially as, and for the purpose, described.
Sixth The rotary carrier for a continuously rotating shuttle, provided with a
raised rib or projection having its outer edge inclined with respect to the shuttle-
carrier whereby the needle-thread as it passes the same will be deflected from the
path of the shuttle-point, all substantially as, and for the purpose, described.
Seventh-The continuously rotating shuttle and its carrier and race-way, in
combination with the button and its head n² arranged in such race-way and with
the flat and depressed bearing face of for such button head, all substantially as, and
for the purpose, specified.
Eighth The upper feed-bar arranged to be raised and lowered and to be moved
forward and backward by suitable mechanism, in combination with the under or
auxiliary feed-bar arranged to grip the material being sewed, between it and the
upper feed-bar, and to move forward and backward, receiving its forward move-
ment directly from and because of the pressing of the upper feed-bar, upon it in the
similar movement of the said upper feed-bar, and its backward movement by and
through a radial arm I secured to it, and a cam J2 or by other suitable mechanism
acting upon it alone and independent of the movement of the upper feed-bar in a
similar direction, all substantially as described.
Ninth The combination, with a needle having a reciprocating motion, of a
continuously rotating shuttle-carrier arranged to pass at one side of the said needle
and to press or bear by the face of its block against it, should the needle be bent or
otherwise placed out of its proper line of movement, all substantially as described.
Tenth The race-way having an open end for the continuously rotating shuttle
and its carrier, in combination with the arms F, G, for partially closing the said
open end, the arm F being adapted to act as an under or auxiliary feed-bar, and
the arm G to be closed upon and opened from the said race-way, all substantially
as, and for the purpose, described.
In witness whereof I the said William Robert Lake have hereunto set my
hand and seal this First day of July in the year of our Lord One thousand
eight hundred and eighty two :
WN. ROBT. LAKE. (L.S.)