IMPROVEMENTS IN SEWING-MACHINES
Year: 1881

page_text: LETTERS PATENT to John Guy Wilson, of 8, Quality Court, Chancery Lane,
London, and of 71, Market Street, Manchester, in the County of Lancaster,
Mechanical Engineer and Patent Agent, for an Invention of "IMPROVEMENTS
IN SEWING-MACHINES." A communication from abroad by Arthur Mortimer
Leslie, of the City of Chicago, in the State of Illinois, United States of
America, Publisher, and the Teller Manufacturing Company, of the City of
Cleveland, in the State of Ohio, United States of America, Manufacturers.
PROVISIONAL SPECIFICATION left by the said John Guy Wilson at the
Office of the Commissioners of Patents on the 13th April 1881.
JOHN GUY WILSON, of 8, Quality Court, Chancery Lane, London, and of
71, Market Street, Manchester, in the County of Lancaster, Mechanical Engineer
and Patent Agent. "IMPROVEMENTS IN SEWING MACHINES." A communication.
from abroad by Arthur Mortimer Leslie, of the City of Chicago, in the State of
Illinois, United States of America, Publisher, and the Teller Manufacturing
Company, of the City of Cleveland, in the State of Ohio, United States of America,
Manufacturers.
This Invention relates primarily to the construction of a novel rotary shuttle
sewing machine, and its main object is to embody the rotary shuttle principle in a
sewing machine, having in a superior degree the standard qualities of noiselessness or
freedom from excessive noise, light running, or freedom from excessive friction, and
perfection of stitch, or freedom from liability to twist or untwist the thread and
the like, with convenience of manipulation, so as to be easily adjusted and controlled,
uniformity of action, so as to work substantially the same at high and low speeds,
and simplicity of construction, so as to be readily manufactured and kept in
repair.
The Invention consists more particularly in certain novel combinations of parts,
and in the construction and arrangements of certain parts; to wit,―
1st. In combining in a sewing machine a reciprocating needle bar carrying an
eye pointed needle and a rotary shuttle in the form of a segmental disc, having a
Price 1071

page_text: "
central bobbin, and arranged in a vertical transverse plane with parallel horizontal
shafts arranged respectively within the arm of the machine and beneath the cloth-
plate, and provided with suitable drivers" for said needle bar and shuttle; a
driving pulley applied to the upper shaft, and a crank movement including a lever
pitman within the upright portion of said arm for transmitting motion from said
upper shaft to under shaft, so as to cause the latter to rotate with an alternately
fast and slow motion, the special objects being (1) to provide for driving the
machine at high speeds with superior economy of power and freedom from noise
and wear as compared with other shuttle machines, which is accomplished by more
fully utilizing the advantages of continuous rotary motion, and (2) to provide for
employing a large axial bobbin without multiplying the motion of the shuttle,
which is accomplished by simply timing the parts so that the shuttle will pass
through the needle loops at the greatest spead of the under shaft, the needle-loops
being thus formed and released quickly enough, notwithstanding the large size of
loop which is required.
2ndly. In combining with the said driving mechanism and the said needle bar
and its needle and driver a segmental disk shuttle rotating freely within a circular
shuttle-race, and a shuttle-driver which projects into and nearly fills the space
within the said race behind the heel of the shuttle, provision being made for a
limited separation of the two by the momentum of the shuttle when the under
shaft is slowed, whereby the needle-loops are freely released by periodically opening
a space between the heel of the shuttle and its driver, without the complication of
parts.
3rdly. In combining with the said driving-mechanism, the said needle-bar and
its needle and driver, and the said shuttle and shuttle-driver an independent
take-up in the form of a lever arm actuated by the said upper shaft, and timed to
let down ample thread for needle-loops of the required size, and to take up the
slack when the needle-loops are released, the take-up cam being preferably formed
as a groove in the back of the needle-driver disk.
4thly. In combining with the said driving-mechanism the said needle bar and
its needle and driver, the said shuttle and shuttle-driver, and the said take-up.lever
arm and cam, a four motion feed actuated by the said undershaft, and timed to
carry the cloth forward under the needle after each withdrawal of the latter in
customary manner, the lifting-cam being formed in one piece with the disk of the
shuttle driver for simplicity and compactness.
5thly. In combining with the hollow arm of the machine a bearing plate held in
place by screws, so as to facilitate assembling said rotary shaft mechanism, said
bearing plate serving to support the pulley end of the said shaft.
upper
6thly. In constructing the segmental rotary-shuttle with a weight reducing
recess or recesses between its axial bobbin-chamber and peripheral guide-flange, so
as to free it partially from unequal centrifugal effect when running at high speeds,
thereby materially reducing its friction within the shuttle race, and facilitating the
separation of the heel of the shuttle from a driver which projects behind said heel
in the manner aforesaid, or by any suitable means, without losing the advantage of
unequal centrifugal effect in aiding the shuttle to catch the needle-loops.
7thly. In combining in a sewing machine a reciprocating needle-bar carrying an
eye-pointed needle, a segmental rotary shuttle provided with a bobbin, and having
a peripheral guide-flange, a shuttle-race having an attached cap, forming a groove
to receive said flange, and a shuttle-driver projecting behind the heel of said
shuttle, and constructed with a deep peripheral notch or groove in the plane of
rotation, to accommodate the needle in its descent, and to form a "detached horn"
which keeps the needle-thread and shuttle thread from interfering with each other
without complication of parts.
8thly. In combining in a sewing machine, a segmental rotary shuttle having an
open bobbin-chamber in its outer face and a peripheral guide-flange, a shuttle race
having a screw fastened cap, forming a groove to receive said flange, and constructed
with a concentric opening to expose said bobbin-chamber, a bobbin removable at

page_text: will from said bobbin chamber through said opening, and a shuttle-driver composed
of a disk parallel to said race, and a projection extending into the latter behind the
heel of the shuttle, for insuring at once a steady motion of the shuttle, the ready
removal of the shuttle at will without disturbing the driver, and the ready removal
of the bobbin without disturbing the shuttle.
9thly. In combining with the said shuttle race, shuttle, and bobbin, a bobbin-
latch and ejector attached to the shuttle as a part thereof for releasing and
throwing out the bobbin without disturbing the shuttle.
10thly. In constructing the said bobbin-latch in the form of a rocking lever
with its pivot parallel or substantially parallel to the outer face of the shuttle, the
body of the latch being arranged within a radial recess in said outer face to
adapt the same to be operated by simple pressure upon the latch.
11thly. In constructing the bobbin ejector in the form of a spring-finger rigidly
attached to the inner end of the latch at the back of the shuttle, the same serving
to keep the latch fastened while the bobbin and its case are in place, and to eject
the same to a sufficient extent when the latch is thrown back to unfasten the
bobbin and its case.
12thly. In combining with the said rotary shuttle, removable bobbin, and
bobbin-latch, a non rotary bobbin case provided with a circumferential flange to
engage with said latch, and adapted to permit the bobbin to rotate freely within
it, the same precluding any rotation of the bobbin with the shuttle, and thus
preventing any twisting or untwisting of the bobbin thread by the shuttle, while
it also facilitates securing and withdrawing the bobbin.
13thly. In constructing the said bobbin-case with a peculiar composite arm
forming a superior tension for the underthread, and means whereby the case is
rendered non-rotary, the same being composed principally of a pair of blade springs,
between which the thread is drawn, and a screw for separating the springs more or
less to regulate the tension.
14thly. In combining in a sewing-machine a horizontal rotary shaft beneath the
cloth-plate carrying a lifting feed-cam adjacent to the parallel path of the feed-dog,
and an adjacent stroke-cam, a horizontal slide actuated by the latter, a parallel
feed bar resting on said lifting-cam, a horizontal lever-arm pivoted to said bar and
engaged by said slide, and a fulcrum carried by a slide parallel, or nearly parallel,
to said lever arm, with the customary means for adjusting the fulcrum from the
top of the cloth-plate to make the stitches longer or shorter, the whole constituting
an efficient feed motion of superior simplicity and compactness.
15thly. In combining with the said feed-bar and fulcrum-slide a steel pin
parallel to the latter, which forms at once a support for the front end of the feed
bar, and a non-wearing abutment for the fulcrum slide.
16thly. In combining with the said feed-dog and feed slide a slotted horizontal
wedge and a vertical screw for adjusting the dog vertically, so as to regulate the
projection of its teeth in a superior manner.
17thly. In combining with a cylindrical needle-bar which slides vertically and
with the crank wrist of a needle driving disk carried by a rotary upper shaft, and
with the head of the machine within which said driving disk is located, a deep
face piece forming part of said head drilled to receive said needle bar, and provided
with parallel planed ways on the respective sides of the bar, and a cross head or
needle heart having a matching solid projection faced with steel on one side of the
needle-bar, and on the other side a projection containing a steel disk with an
adjusting screw behind it for taking up wear.
18thly. In combining with the said head of the machine a properly actuated
take-up lever-arm, projecting at its front edge in the plane of the machine-arm, or
thereabouts, and an upper tension device and thread-guides attached to the back of
said head, the former nearer its lower end, whereby at once threading the machine
and regulating the tension are facilitated; the take-up is adapted to draw the
thread from the needle in a nearly direct line, and said thread is relieved from

page_text: unnecessary friction and strain between said upper tension device and the
needle.
19thly. In combining with the said head of the machine and the said take-up
lever-arm, and with the presser bar within the former, a supplemental take-up
consisting of a helical spring having a loop at its outer end through which the
needle thread passes, and attached at its inner end to an arbor, which is connected
with said presser bar so as to uncoil said spring, and thus lessen its action on the
slack thread more or less according to the elevation of the presser foot by the
thicknesses beneath it, thereby adapting the machine to sew very thin or very
thick goods.
20thly. In constructing the presser foot and its bar with matching notches, the
latter being also threaded at its lower end, and provided with a milled thumb nut,
whereby the foot is adapted to be readily adjusted and removed laterally and to
be securely fastened in working position.
The parts above named with a table furnished with a driving treadle, bobbin
winder, &c., a hand wheel keyed on the said upper shaft, and an automatic friction
clutch between the said driving pulley and said shaft, and other appurtenances,
which may be of any suitable description, unite to form the new rotary shuttle
sewing machine aforesaid. By the customary modifications this machine may be
adapted to be driven by "hand or by "power," and the respective parts and com-
binations may be embodied in other machines where they will accomplish like
results in substantially the same way without the parting from this Invention.
"

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said John Guy Wilson in the Great Seal Patent Office on the
13th October 1881.
JOHN GUY WILSON, of 8, Quality Court, Chancery Lane, London, and of
71, Market Street, Manchester, in the County of Lancaster, Mechanical Engineer
and Patent Agent. "IMPROVEMENTS IN SEWING MACHINES." A communication
from abroad by Arthur Mortimer Leslie, of the City of Chicago, in the State of
Illinois, United States of America, Publisher, and the Teller Manufacturing
Company, of the City of Cleveland, in the State of Ohio, United States of America,
Manufacturers.
This Invention relates primarily to the construction of a novel rotary shuttle
sewing machine, and its main object is to embody the rotary shuttle principle in a
sewing machine, having in a superior degree the standard qualities of noiselessness
or freedom from excessive noise, light running, or freedom from excessive friction,
and perfection of stitch, or freedom from liability to twist or untwist the thread
and the like, with convenience of manipulation, so as to be easily adjusted and
controlled, uniformity of action, so as to work substantially the same at high and
low speeds, and simplicity of construction, so as to be readily manufactured and
kept in repair.
The Invention consists more particularly in certain novel combinations of parts,
and in the construction and arrangement of certain parts; to wit,—.
First. In combining in a sewing machine a reciprocating needle bar carrying an
eye pointed needle and a rotary shuttle in the form of a segmental disk having a
central bobbin, and arranged in a vertical transverse plane with parallel horizontal
shafts arranged respectively within the arm of the machine and beneath the cloth
plate, and provided with suitable "drivers" for said needle bar and shuttle, a
driving pulley applied to the upper shaft, and a crank movement, including a lever
pitman within the upright portion of said arm for transmitting motion from said
upper shaft to the under shaft, so as to cause the latter to rotate with an alternately
fast and slow motion, the special objects being (1) to provide for driving the.
machine at high speeds with superior economy of power and freedom from noise
and wear, as compared with other shuttle machines, which is accomplished by more
fully utilizing the advantages of continuous rotary motion, and (2) to provide for
employing a large axial bobbin without multiplying the motion of the shuttle,
which is accomplished by simply timing the parts so that the shuttle will pass
through the needle loops at the greatest speed of the under shaft, the needle loops
being thus formed and released quickly enough, notwithstanding the large size of
loop which is required.
Secondly. In combining with the said driving mechanism and the said needle
bar and its needle and driver a segmental disk shuttle rotating freely within a
circular shuttle-race and a shuttle driver, which projects into and nearly fills the
space within the said race behind the heel of the shuttle, provision being made for
a limited separation of the two by the momentum of the shuttle when the under
shaft is slowed, whereby the needle loops are freely released by periodically
opening a space between the heel of the shuttle and its driver without complication
of parts.
Thirdly. In combining with the said driving mechanism the said needle bar and
its needle and driver and the said shuttle and shuttle driver an independent take up
in the form of a lever arm actuated by the said upper shaft, and timed to let down
ample thread for needle loops of the required size, and to take up the slack when
the needle loops are released, the take up cam being preferably formed as a groove
In the back of the needle driver disk.

page_text: Fourthly. In combining with the said driving mechanism the said needle bar
and its needle and driver, the said shuttle and shuttle driver, and the said take up
lever arm and cam, a four motion feed actuated by the said under shaft, and timed
to carry the cloth forward under the needle after each withdrawal of the latter in
customary manner, the lifting cam being formed in one piece with the disk of the
shuttle driver for simplicity and compactness.
Fifthly. In combining with the hollow arm of the machine a bearing plate held
in place by screws, so as to facilitate assembling said rotary shaft mechanism, said
bearing plate serving to support the pulley end of the said upper shaft.
Sixthly. In constructing the segmental rotary shuttle with a weight reducing
recess or recesses between its axial bobbin chamber and peripheral guide flange, so
as to free it partially from unequal centrifugal effect when running at high speeds,
thereby materially reducing its friction within the shuttle-race, and facilitating the
separation of the heel of the shuttle from a driver which projects behind said heel
in the manner aforesaid, or by any suitable means, without losing the advantage of
unequal centrifugal effect in aiding the shuttle to catch the needle loops.
Seventhly. In combining in a sewing machine a reciprocating needle bar
carrying an eye pointed needle, a segmental rotary shuttle provided with a bobbin,
and having a peripheral guide flange, a shuttle race having an attached cap forming
a groove to receive said flange, and a shuttle driver projecting behind the heel of
said shuttle, and constructed with a deep peripheral notch or groove in the plane
of rotation to accommodate the needle in its descent, and to form a "detached
horn," which keeps the needle thread and shuttle thread from interfering with
each other without complication of parts.
Eighthly. In combining in a sewing machine a segmental rotary shuttle having an
open bobbin-chamber in its outer face and a peripheral guide flange, a shuttle race
having a screw fastened cap forming a groove to receive said flange, and constructed
with a concentric opening to expose said bobbin chamber, a bobbin removable at
will from said bobbin chamber through said opening, and a shuttle driver
composed of a disc parallel to said race, and a projection extending into the latter
behind the heel of the shuttle for insuring at once a steady motion of the shuttle,
the ready removal of the shuttle at will without disturbing the driver, and the
ready removal of the bobbin without disturbing the shuttle.
Ninthly. In combining with the said shuttle race, shuttle and bobbin, a bobbin
latch and ejector attached to the shuttle as a part thereof for releasing and throwing
out the bobbin without disturbing the shuttle.
Tenthly. In constructing the said bobbin latch in the form of a rocking lever
with its pivot parallel or substantially parallel to the outer face of the shuttle, the
body of the latch being arranged within a radial recess in said outer face to adapt
the same to be operated by simple pressure upon the latch.
Eleventhly. In constructing the bobbin ejector in the form of a spring finger
rigidly attached to the inner end of the latch at the back of the shuttle, the same
serving to keep the latch fastened while the bobbin and its case are in place, and
to eject the same to a sufficient extent when the latch is thrown back to unfasten
the bobbin and its case.
Twelfthly. In combining with the said rotary shuttle, removable bobbin, and
bobbin latch, a non rotary bobbin case provided with a circumferential flange to
engage with said latch and adapted to permit the bobbin to rotate freely within it,
the same precluding any rotation of the bobbin with the shuttle, and thus
preventing any twisting or untwisting of the bobbin thread by the shuttle, while
it also facilitates securing and withdrawing the bobbin.
Thirteenthly. In constructing the said bobbin case with a peculiar composite
arm forming a superior tension for the under thread, and means whereby the case
is rendered nonrotary, the same being composed principally of a pair of blade-
springs between which the thread is drawn, and a screw for separating the springs
more or less to regulate the tension.
Fourteenthly. In combining in a sewing machine a horizontal rotary shaft

page_text: beneath the cloth plate carrying a lifting feed cam adjacent to the parallel path of
the feed dog, and an adjacent stroke cam, a horizontal slide actuated by the latter,
a parallel feed bar resting on said lifting cam, a horizontal lever arm pivoted to
said bar and engaged by said slide, and a fulcrum carried by a slide parallel, or
nearly parallel, to said lever arm, with the customary means for adjusting the
fulcrum from the top of the cloth plate to make the stitches longer or shorter, the
whole constituting an efficient feed motion of superior simplicity and compactness.
Fifteenthly. In combining with the said feed bar and a fulcrum slide a steel pin
parallel to the latter, which forms at once a support for the front end of the feed
bar and a nonwearing abutment for the fulcrum slide.
Sixteenthly. In combining with the said feed dog and feed slide a slotted hori-
zontal wedge and a vertical screw for adjusting the dog vertically, so as to regulate
the projection of its teeth in a superior manner.
Seventeenthly. In combining with a cylindrical needle bar which slides vertically
and with the crank wrist of a needle driving disk carried by a rotary upper shaft,
and with the head of the machine within which said driving disk is located, a
deep face piece forming part of said head drilled to receive said needle bar, and
provided with a parallel planed ways on the respective sides of the bar, and a cross
head or "needle heart" having a matching solid projection faced with steel on one
side of the needle bar, and on the other side a projection containing a steel disc
with an adjusting screw behind it for taking up wear.
Eighteenthly. In combining with the said head of the machine a properly
actuated take up lever arm projecting at its front edge in the plane of the machine
arm or thereabouts, and an upper tension device and thread guides attached to the
back of said head, the former near its lower end, whereby at once threading the
machine and regulating the tension are facilitated; the take up is adapted to draw
the thread from the needle in a nearly direct line, and said thread is relieved from
unnecessary friction and strain between said upper tension device and the needle.
Nineteenthly. In combining with the said heads of the machine and the said
take up lever arm,
and with the presser bar within the former, a supplemental
take up consisting of a helical spring having a loop at its outer end through which
the needle thread passes, and attached at its inner end to an arbor, which is
connected with said presser bar so as to uncoil said spring, and thus lessen its
action on the slack thread more or less according to the elevation of the presser
foot by the thicknesses beneath it, thereby adapting the machine to sew very thin
or very thick goods.
Twentiethly. In constructing the presser foot and its bar with matching notches,
the latter being also threaded at its lower end, and provided with a milled thumb
nut, whereby the foot is adapted to be readily adjusted and removed latterly, and
to be securely fastened in working position.
The parts above named with a table furnished with a driving treadle, bobbin
winder, &c., a hand wheel keyed on the said upper shaft, an automatic friction clutch
between the said driving pulley and said shaft and other appurtenances, which
may be of any suitable description, unite to form the new rotary shuttle sewing
machine aforesaid.
By the customary modifications this machine may be adapted to be driven by
"hand" or by "power," and the respective parts and combinations may be embodied
in other machines where they will accomplish like results in substantially the same
way, without departing from this Invention.
Now in order that the said Invention may be fully understood and carried into
effect, I will proceed with the aid of accompanying Drawings more fully to describe
the same.
The said Drawings consist of three sheets, bearing thirty consecutively numbered
Figures representing the upper works or machine proper of the said rotary shuttle
sewing machine and its various principal parts.
Figure 1 (Sheet 1) is a face view or end elevation of the said upper works
hereinafter termed the "machine;" Figure 2 is a side elevation of the same
:

page_text: showing the front of the machine; Figure 3 is a top view of the cloth plate and of
the parts beneath as exposed by removing its slide and throat plate; and Fig. 4
is a top view of the machine partly in horizontal section on the line 4, 4, Figure 2,
showing the parts within the arm and head.
Figure 5 (Sheet 2) represents a vertical longitudinal section on the line 5, 5,
Figure 4; Figure 6, a vertical transverse section on the line 6, 6, Figure 5;
Figure 7, a bottom view of the machine; and Figure 8 a vertical transverse section
on the lines 8, 8, Figures 5 and 7.
(The bobbin and bobbin case are omitted in Figures 5 and 7).
Figure 9 (Sheet 3) is a face view of the hand wheel; and Figure 10 shews the
driving pulley by views of its respective faces. Figure 11 is an elevation of the
arm casting; and Figure 12 is a like view of its bearing plate. Figure 13 is a
back view of the head with which the arm of the machine terminates, the upper
shaft being shewn in cross section and the arm as broken off so as to expose the
combined crank disk and take-up cam; and Figure 14 is a matching face view of
that part of the head which is integral with the arm, with the said combined crank
disc and take up cam removed. Figure 15 is a top view of the presser foot
omitted in Figure 13; and Figure 16 is a horizontal section on the line 16, 16,
Figure 13. Figure 17 is a back view of the face plate, part of the head removed;
and Figure 18 is a face view of the integral part of the head, shewing the surfaces
which are exposed by removing said face plate. Figure 19 is a horizontal section
on the line 19, 19, Figure 17, omitting parts below the plane of section; and
Fig. 20 is a bottom view of the needle heart shown in Figs. 17 and 19; Fig. 21
is a face view of the shuttle with threaded bobbin and bobbin case therein;
Fig. 22, a section on the line 22, 22, Fig. 21; and Fig. 23, an elevation of the
empty bobbin and bobbin case separated; Fig. 24 is a face view of the shuttle
empty; Fig. 25, a section on the line 25, 25, Fig. 24; and Fig. 26, a back view of
the shuttle. Figs. 27 and 28 are edge views of the empty shuttle; and Figs. 29
and 30 respectively a face view of the shuttle driver and an axial section thereof on
the line 30, 30, Fig. 29.
Figs. 1 to 20 inclusive ase drawn to one and the same scale; and Figs. 21 to 30
inclusive to another and larger scale. The planes of the respective sections are
indicated by broken lines across other Figures numbered corresponding with the
Figures in which the sections appear, as aforesaid, with arrows crossing the same in
the direction of vision; lettered arrows indicate the motions of parts; and like
letters of reference indicate corresponding parts in all the Figures.
A hollow rigid arm A unites the cloth place C and the head H of the machine,
and these three parts support the operative mechanism.
A reciprocating needle bar B works vertically in guides formed within the head H,
and carries at its lower end a short straight eye pointed needle N, to which an
upper thread 1 is fed from a commercial spool 8.
Immediately in front of the plane of the needle a rotary shuttle S, in the form of
a peculiarly shaped segmental disk, works in a vertical transverse plane within a
shuttle race R beneath the cloth plate C, and is provided with a central disk
bobbin b, from which the under thread 2 is taken.
The needle bar B is driven by a crank disk D' on a rotary shaft S', said disk
having a stud pin wrist provided with an anti friction slide a¹, which works in the
groove of a cross head or needle heart H¹, with which said bar is provided within
the head H, as shown in Figs. 4 and 5. Said shaft S¹ extends horizontally through
the horizontal portion of the arm A, being supported by bearings a¹, b', at the
respective extremities thereof; one end carries the needle driver, as aforesaid, the
other end protrudes, and is furnished with a double pulley P of two diameters, and
a hand wheel W, to the hub of which said pulley is united when turned forward
by means of a friction clutch composed of a pivoted dog d and a spring d', for
holding the same to its work attached to the hub of the wheel W, and an internal
shoulder e formed in the outer face of the pulley P concentric with the shaft, as
shown in detail in Figs. 9 and 10. The wheel W is fastened on the shaft S¹ by

page_text: means of a screw 8¹ (Fig. 5). The pulley P is driven by a band from a driving
pulley or band wheel in customary manner, one or the other of its grooves being.
used, according to the relative speed at which the user desires to run the machine.
Owing to said clutch connection between the shaft S¹ and pulley P the latter is
adapted to be driven backward, as indicated by arrow x (Fig. 1), without driving
said shaft for actuating a bobbin winder or the like in a customary way by means
of the driving band or pulley, while the machine is otherwise at rest. When said
pulley is driven forward as aforesaid an even motion is imparted to the shaft S',
and therethrough to the needle in the most direct manner, and consequently with
the least loss of power. Said shaft S' has a crank C¹ within the arm A in line
with the centre of the upright portion or standard of said arm, and the wrist of
said crank is embraced by the journal head of a lever pitman I', the slot of which
embraces a rocking fulcrum F1 which is supported within the standard by an axial
screw 82, as shown in Figs. 4 to 6. The lower end of the pitman L' is provided
with a stud pin carrying an anti-friction roller a², which works in the radial
groove of a grooved crank hub or disk C² on the adjacent end of a shaft S", which
is supported parallel to the shaft S¹ by hanger bearings i, j, cast on the bottom
of the cloth plate C, and rotates freely therein, but in a direction the reverse of that
of said shaft S2, as illustrated by arrows a, b, in Figs. 1 and 6, and with an uneven
motion, the other end of said shaft S2 being provided with a circular disk D,
which closes the back of the shuttle race R, and carries the shuttle driver proper D
in the form of a seginental projection, which nearly fills the space within the shuttle
race behind the heel z of the shuttle, as shown in Fig. 1.
By inspecting Figs. 1 and 6 it will be seen that in the position of the parts shewn
in these and all other views of the machine on Sheets 1 and 2, when the shuttle S
is ready to release the needle loop, as shown in Fig. 1, the lower shaft is approaching
its point of slowest motion, which is reached when the crank C¹ is on its upper
centre, the power end of the lever being then longest, and the motion of the other
end correspondingly reduced. An important advantage is thus gained in the
operation of the shuttle, which being loose does not immediately partake of the
change of speed, but by its momentum speeds ahead of the shaft controlled driver,
as indicated by arrow c, Fig. 1, and thus permits the needle loop to escape freely
'between. Another advantage of the fast and slow motion is the accommodation of
a central bobbin of ample size, the shuttle containing such bobbin being carried
through the needle loop at the faster speed of the shaft, and consequently within a
relatively short time. Apart from these considerations this rotary shaft mechanism
is highly advantageous, as aforesaid, in providing for driving the machine at high
speeds, and with superior economy of power and freedom from noise and wear, as
compared with other shuttle machines, owing to the continuous rotary motion of
the principal parts.
A rotary upper shaft to receive the even motion of the motor is essential to said
employment of a fast and slow under shaft, as will be observed, and by the
employment of such upper shaft one is also enabled to employ a positive and
independent take up lever arm T, which lets down ample slack for the shuttle, and
is adapted to give down and take up thread while the needle is stopping and
starting, or in fact may receive any required movement (see Figs. 2 and 4 and 13
and 14); said lever arin T projects through a slot in one edge of the head H, being
pivoted parallel to the shaft S₁ and behind it by a stud pivot p on itself occupying
a socket drilled therefor in the integral part of the head, and is operated by a
recessed cam or cam groove c' of the required shape, which is formed at the back
of the crank disc D' and is traversed by an anti friction roller a³ upon a stud pin
on the lever arm. The said cam has been shaped and timed so as to let down
thread as soon as the needle enters the goods and until the greatest diameter of the
shuttle is through the needle loop, and to take up rapidly in conjunction with
the feed during the slow motion of the under shaft and the descent of the
needle to the cloth. The take up stroke of the lever arm T is indicated by
arrow d

page_text: "
The rotary under snart enables me at the same time to employ a "feed" of the
highly approved form known as the "four motion under feed, which is located
beneath the cloth plate C in customary position, and timed to carry the cloth
forward under the needle N after each withdrawal of the latter in customary
manner as aforesaid, its cams c, c², being carried by the under shaft S2, and the
former, which is the lifting cam, formed in one piece with the shuttle driver
disk D2, as shown in Fig. 30. The feed mechanism will be described in detail
further on.
To facilitate assembling the parts of the rotary shaft mechanism within the arm
as aforesaid, the bearing b' at the right hand end of the shaft S¹ is made a
part of a plate B¹, which is attached by means of screws after said parts are in
place.
Said bearing plate and the face plate of the head H being off, as shown in
Figs. 11 and 12, the naked crank shaft is introduced endwise and pushed through
to receive the crank disk D¹, which is held in place thereon by the ordinary
radial set screw, as shewn in Fig. 5, with its wrist about 90 degrees in advance
of that of the crank C¹. The shaft is then drawn back into position. The
bearing-plate B¹ is then secured in place and is followed by the pulley P and
wheel W, the lever pitman L' having been first introduced endwise through the
standard and the fulcrum F¹ inserted there through and supported by the insertion
of its screw 82. After the bearing-plate is in position the lever may be engaged
with the crank C and then attached to the crank C¹, the latter being readily
accomplished by means of a screw-driver inserted through an orifice o' (Fig. 6) in
the front of the standard, the shaft being turned to bring the screws successively
opposite said orifice. A swinging plate p' is attached by a pivotal screw to the
face of the standard, so as to cover the orifice o¹ to exclude dust. An orifice o² in
the bearing-plate provides for tightening the screw 82 without removing said
bearing-plate and also for lubricating the parts within as does the orifice o¹.
Additional oil-holes are formed in customary manner at all the points where they
are required.
To lighten the shuttle S, and more particularly to reduce the unequal effect of
centrifugal force thereon owing to its segmental shape, its thicker or wider side is
recessed or made hollow behind, as shown at y, Figs. 22, 26, and 27, and this I
have discovered can be carried to the extent indicated without destroying the
desirable tendency of the shuttle to separate from its driver D by centrifugal force,
so that the needle-loops may pass between. Heretofore the tendency of the rotary
shuttle to fly outward has been so great at high speeds as to seriously increase the
friction of the shuttle within the race and thus to occasion excessive pressure of
the driver against the heel z of the shuttle. A guard g in the form of an incline
spanning the recess y diametrically opposite the heel z serves to facilitate casting
off the needle loops, or in other words to keep them from catching on the
rearwardly projecting central portion of the shuttle (see Figs. 22, 26, and 27).
Radial slots have been used as a substitute for the said recess y.
The shuttle race R is formed by a braced and recessed projection cast on the
bottom of the cloth plate, together with a segmental annular cap c³ attached to the
planed face of said projection by screws 83, said cap being attached by screws to
provide for removing the shuttle for inspection and repairs. This will rarely be
necessary.
When said cap is in position a circumferential groove is formed which embraces
the peripheral edge w of the shuttle, the latter being adapted to work smoothly in
said groove, and the shuttle thus guided at its periphery is driven by the front
end 22, Fig. 29, of the driver D with very little friction or noise.
A deep groove or notch n (Fig. 30) in the peripheral surface of the driver D
accommodates the point of the needle N preliminary to and during the casting
off of each needle-loop of the upper thread, the rear end of the driver being
detached thereby in the form of a long horn m, which serves to prevent inter-
ference between said upper thread 1 and the under thread 2 at and before the

page_text: entrance of the nose or point x of the shuttle into said needle loop x², being the heel
of the driver which is followed by the point of the shuttle (compare Figs. 1
and 5 with Figs. 21-30). The driver D (Figs. 29 and 30) extends inward across
the end of the shaft S², having at its inner extremity a stud pin p² which is fitted
to an axial socket in the shaft. A screw 8 passes through the body of the driver
into a tapped hole in the driver-disk D³, rendering the driver substantially fixed
relatively to the feed-cam c, which is formed with said disk as aforesaid.
For the accommodation of the central bobbin b, the shuttle S has a bobbin
chamber c in its outer face, so that the same remains exposed within the opening
of the concentric annular race-cap c³, to facilitate the removal of the bobbin
without disturbing the shuttle, and the bobbin b with an annular bobbin-case b²
is arranged within said bobbin-chamber (see Figs. 21 and 22 in connection with
Fig. 1). An axial stud or hub renders the bobbin-chamber c annular, and a recess
extending radially from said hub and terminating outside of said chamber
accommodates a combined bobbin retaining latch and ejector l, e, which works
on a screw pivot parallel to the face of the shuttle, as shown most clearly in
Figs. 22, 25, and 28, forming a permanent attachment of the shuttle, and is
adapted to be actuated to release and throw out the bobbin by the simple
pressure of a pencil-point pin, or the like, against the exposed surface of the
Jatch being provided with a small counter-sink or depression near its outer
extremity, as shown in Figs. 21, 24, and 25, to facilitate so actuating it.
k
The ejector part consists of a spring finger e rigidly attached to the inner end
of the latch body at the back of the shuttle, the same serving to keep the
latch fastened while the bobbin and its case are in place, as shown in Fig. 22,
and to eject the same or cause it to protrude to a sufficient extent when the
latch is thrown back, as shown in Fig. 25, to unfasten the bobbin and its case
as aforesaid.
I
The latch proper consists of a bevelled projection on the latch body so arranged
as to project into the bobbin-chamber through its circumferential wall, as shown in
Fig. 22, and this engages with a circumferential flange f on the bobbin-case.
The bobbin case 62 has a central sleeve u, Fig. 23, fitted to the shuttle hub, and
the bobbin b is adapted to rotate upon this sleeve free from contact with any part
of the shuttle, and said bobbin-case being non-rotary, as aforesaid, any rotation of
the bobbin with the shuttle is precluded, as aforesaid, while by the same means
securing and withdrawing the bobbin are facilitated.
The particular means provided for rendering the bobbin case non-rotary and for
the purposes of an under tension consists chiefly of a composite arm t², Figs. 1
and 3, shown in detail in Figs. 21-23, the same comprising a pair of blade
springs v, 2, united rigidly to each other and to the bobbin-case at the lower end
of the arm, and adapted to be separated more or less at their free upper ends to
regulate the tension on the under thread 2, by means of a little screw so fitted to
a tapped orifice in the inner and lighter spring v², and engaging with the face of
the bobbin case at its inner end (see Fig. 23).
The outer spring v is supported at the proper distance from the face of the
bobbin-case by a stud pin q, in line horizontally with a lateral hole h in the bobbin
case, and is itself provided with a threading notch or self threading hole h² it its
opposite edge, as shown in Fig. 21. A minute spring finger f2 attached to the
outer surface of the spring v projects over said notch h² to keep the needle loops
from catching therein, and a rigid guard flange f³ is attached to the bobbin case at
the inner lateral edge of the springs, as shown in Fig. 22, for a like purpose.
The upper ends of the springs v, v², are bent inward so as to lie close to the outer
face of the shuttle when in working position, as shown in Fig. 22, and are provided
respectively with an inwardly projecting stud pin p³, and a hole to receive the
same to prevent the escape of the under thread laterally from between the springs,
while the upper extremity of the spring v is constructed with an outwardly
projecting smooth flange, the office of which will appear presently.
The bobbin b has been constructed with a tongue t (Fig. 23), thrown out from

page_text: the metal of its sleeve hub to keep the under thread from slipping thereon, and
is filled or " wound
like other disk-bobbins. The end of this thread is then
passed through the lateral hole h in the bobbin case, and the bobbin is slipped
flat end foremost upon the sleeve u and into the case 62, which partially encloses it
so that the thread may at all times pass freely to said threading hole. The thread
is now passed diagonally across the arm t² to and into the notch h² in the outer
spring v, and is then drawn between the springs v, v², and against the pin p³
by a simple lateral movement. The threaded bobbin and bobbin case are now
inserted together into the exposed bobbin chamber c of the shuttle S (the shuttle
being already within the race R, where it remains undisturbed ordinarily, as
aforesaid), and are automatically secured therein by the latch as attested by an
audible click. A clear annular space of ample width is now formed outside of the
catch flange f, and through this space the under thread 2 passes freely outside of
the shuttle to the arm t2, and from the upper extremity of this arm it passes
directly to the cloth, as indicated in Fig. 1, and being kept taut by the tension
thereon;
it operates to keep the arm 2 in position and therewith to keep the bobbin
case non-rotary, as aforesaid, while the machine is regularly at work. A pair of
stops i, j, are attached by screws to the face of the shuttle-race-cap at top, as
clearly shown in Fig. 1, to engage with the flanged upper end of the spring v to
keep the arm t2 in position when the machine is at rest and when it is suddenly
stopped and started. The under tension may, it will be observed, be readily
regulated by turning the screw 85 without unthreading the bobbin-case, while the
threading operation when a full bobbin is inserted is rendered very simple. The
tension is moreover wholly upon the thread, and consequently the same whether
the bobbin be full or empty. The shuttle is located as high as is practicable for
economy of motion, and the shuttle race and its cap are made open at top to admit
the needle and to provide for the passage of the threads, and all the parts of this
mechanism are made snug and smooth so as not to catch or cut either thread.
Access to the face of the shuttle is facilitated by the removal of a dovetailed
slide or sliding plate p* from an opening o in the cloth plate, and by the removal
of a screw attached throat plate 25 at the inner end of the same opening, the feed
mechanism also is exposed, as shown in Fig. 3.
The feed-dog F and the improved feed mechanism as a whole are shown most
clearly in Figs 3, and 5- - 8. The aforesaid cams c, c², are single-acting, and need
therefore simply be shaped so as to have the usual throw. They are fastened on
the under shaft 82 on the respective sides of the bearing 12 by radial set screws
being timed as aforesaid, and they engage respectively with the bearing surface
of a feed bar B3, which carries said feed dog F and receives direct the lifting stroke
indicated by arrow e, Fig. 8, and with an anti friction roller at (Figs. 6 and 7) on a
horizontal slide or yoke y², extending at right angles from the shaft S² toward the
front edge of the cloth plate C beneath the same, and connected by a horizontal
lever arm 2 Attached by a vertical pivot-screw S to a lateral extension of the
feed bar B³, and extending through the bifurcated front end of the feed bar and
behind a fulcrum f to and across the path of said yoke, so as to convert the
effective (forward) stroke of the cam C2 into the effective rearward movement of
the feed-dog, as indicated by arrows f (Fig. 7). A spiral retracting spring r is
applied between the rear end of the feed bar and a projection on the cloth plate
farther back, each terminating in a stud which enters the spring and holds it in
place. Lugs 13, 14, cast on the bottom of the cloth plate support the feed bar B³
and yoke y laterally; the feed bar is supported at its rear end by the lifting cam c
and at its front end by a steel pin which extends through the lugs 13 and
through the said fork of the feed bar, which is formed by a screw attached top
plate p in combination with a body of suitable shape, the bar extension to which
the lever arm is attached being part of said top plate, and the yoke y² is
supported at its respective ends by a fork embracing the shaft S2, and a notch
embracing the lever arm 12. The fulcrum f4 is formed on a slide e², which is
adapted to work in a seat cut therefor in the back of the lugs 13 in contact with

page_text: the polished hard surface of the steel pin 26, the latter being partially exposed
throughout its length by said seat, and a rod extension 3 of said slide curved to
avoid contact with one of a pair of depending flanges on the cloth plate terminates
in an integral screw nut n², which receives the lower end of a clamp screw s³,
working through a longitudinal slot 7 in the cloth plate in front of the arm
standard, and provided with a milled head above the cloth plate as means for
readily regulating or varying the length of stitch as in other machines. In the
present mechanism, this result it will be observed is accomplished by adjusting the
fulcrum for securing it in different positions, so as to vary the throw of the feed
bar without changing the relative duration of its effective motions, the full stroke
of the cam c² being used at all times, so as to preserve uniformity of relation
between the feed and take up under all circumstances, and a consequent uniformity
in the perfection of long and short stitches. The feed mechanism is moreover of
superior simplicity, compactness, and positiveness.
The feed dog F projects over the shuttle S and works through a suitable opening
in the throat plate po which completes the cloth plate surface at this point, the
dog extending on both sides of the needle hole, as shown in Fig. 5, so as to equalize
the strain on the cloth. To regulate the prominence of the serrated or toothed
upper surface of the feed dog, its shank is held between vertical lugs on the top of
the feed bar B3 by a vertical screw 88, and a horizontal slotted wedge w² is
interposed, as clearly shown in Figs. 3, 5, and 8.
Referring now more particularly to Figs. 2, 4, and 5, in connection with Figs.
13-20, the construction of the aforesaid needle bar B and presser bar B² with their
appurtenances belonging to, enclosed in, and attached to the head H, will be more
particularly described.
Said bars B, B2, are both cylindrical to facilitate manufacture. The needle bar B
is guided by central drilled holes in the upper and lower ends of a recessed casting
which forms the aforesaid face plate or removable part of the head, shown detached
in Figs. 17 and 19, and is prevented from turning upon its axis by improved means,
including the aforesaid needle heart H¹, shown detached in Fig. 20. This part is
drilled to receive the needle bar, and in assembling, the parts is placed within the
said face plate of the head, and the needle bar is passed there through in the act of
inserting it into its guides; the two are then united by a set screw 59 with said
needle heart H¹ at the proper height to coact with the crank wrist of the needle
driving disk D¹ as aforesaid, in which position it is opposite a pair of parallel planed
ways w³, w, formed on the back of said face plate on the respective sides of the
needle bar, and said ways are traversed respectively by a matching solid projection g³
faced with steel, as shown in Fig. 20, and with a steel disk protruded more or less
from a drilled projection g' by means of a screw 80, to prevent rattling and to take
up wear, as shown more particularly by Fig. 19. Otherwise the needle heart is
shaped as shown with reference to the omission of unnecessary metal, and the
avoidance of any interference between the parts.
The presser bar B2 has a lower guide similar to that of the needle bar. Its
upper end is however made smaller so as to form a shoulder against which presses
the lower end of a spiral spring ¹, surrounding said smaller upper end of the presser
bar, and condensed more or less by a hollow screw y', which forms the upper guide
of said bar in an ordinary way. This bar is prevented from turning on its axis
by a collar x drilled to receive the bar, and clamped thereon in proper position by
a screw w tapped into a boss formed on the collar and projecting into a slot v' in
the face plate, the head of the screw forming also a stud to coact with the lifter L,
which is constructed with two shoulders to support the presser foot at different
heights, and is attached to the outer surface of the face plate by a pivotal screw u¹,
and is arrested by a stop pin ¹, as shown in Fig. 6, and is operated by hand at
will in customary manner.
Rigidly attached to the back of the said collar x', as shown in Figs. 16 and 17,
is a lateral arm q' having at its front end a stud pin by which it is coupled with
a slotted lever arm . Fig. 18 on the inner end of a shouldered rocking arbor 71,

page_text: and within a recess in the face of the integral part of the head, said arbor being
mounted in a hole drilled for its reception in this part. The outer end of said
arbor, which when in position projects from the back of the head, as shown in Figs. 2,
13 and 16, is screw threaded and split to receive the disks, conical wire spring, and
adjusting nut of a rotary disk, upper tension device t¹ of approved form, while it
serves to actuate or control a supplemental take up to, in the form of a helical wire
spring between the back of the head H and said upper tension device t¹, the inner
end of this take up spring being attached to said arbor r¹ by inserting it in a
radial drill hole therein, while its outer extremity forms a loop to engage with the
upper thread.
The spool S (Figs. 1 and 2) is mounted on a spindle e' on the top of the arm A,
and the upper thread 1 is carried therefrom, first through a guide f¹ on the back
of the head H behind the arm A, thence to the said rotary disk tension device t¹
beneath the arm, on the back of the head H and through the loop of the said take
up spring to, thence to the eye of the take up lever arm T, and thence through a
guide g at the bottom of the head, and a threading hole h¹ at the bottom of the
needle bar B directly into the groove and eye of the needle. Threading the machine
and regulating the upper tension are thus facilitated, and the main take up is adapted
to pull directly upward on the thread without drawing it over so many friction
points as in former machines.
The addition of the said supplemental take up and its connection with the presser
bar as aforesaid provide for letting down all the slack thread that may be required
for the thickest goods without endangering the interference of slack thread with
the formation of perfect stitches in thinner materials. When the presser bar is in
its lowest position, the take up spring to is in normal condition. When the presser
bar is supported in higher positions by one or more thicknesses of cloth, for example,
beneath the presser foot said spring is uncoiled more or less, and its effect on the
slack thread is correspondingly reduced.
The needle N is intended to be self setting, and to be made for this purpose
with a shank having a flat face, and the needle bar is accordingly drilled
longitudinally at its lower end to receive the shank of the needle, and provided
with a thumb screw n' for fastening the same therein by engagement with its flat
face. Above this the needle bar has been provided with an oil guard collar m³
formed by a cup shaped annular disk forced over the end of the bar and into
position as shown.
The presser foot p², Fig. 15, has in its elevated rear end a deep lateral notch n³,
and the lower end of the presser bar B² is constructed with matching notches n*
in front and rear, as shown in Fig. 13, to form a contracted portion adapted to
occupy said notch n³, being moreover screw threaded and provided with a mill
thumb nut n³, which is screwed down upon the foot when the latter is in position
to securely fasten it, or unscrewed to loosen and release the foot. When loosened,
the foot may readily be adjusted laterally with reference to the needle, or removed
from the machine, while it is not at any time liable to turn on the bar or to be
worked out of position by the feed. The foot may be otherwise of any preferred
make, but it is preferably stamped out of soft plate steel and hardened in the form
shown, being specially adapted by its form to be so produced.
The large parts of the machine may all be made of iron, and the smaller parts of
steel and iron, used discriminatingly, as in the manufacture of other sewing machines,
and by any approved processes.
The above description will enable those skilled in such arts to make and use the
said machine and its several parts.
Details which are not particularly described are clearly shown in the Drawings,
or may be of a well known description.
Having thus described said Invention, I would have it understood that what I
claim and desire to secure by the aforesaid Letters Patent is,-
1. The combination in a sewing machine of a reciprocating needle bar carrying an
eye pointed needle, and a rotary shuttle constructed in the form of a segmental

page_text: disc having a central bobbin and arranged in a vertical transverse plane, with
parallel horizontal shafts arranged respectively within the arm of the machine and
beneath the cloth plate, and provided with suitable drivers for said needle bar and
shuttle; a driving pulley applied to the upper shaft, and, a crank movement,
including a lever pitman within the upright portion of said arm for transmitting
motion from said upper shaft to the under shaft, so as to cause the latter to rotate
with an alternately fast and slow motion, substantially as hereinbefore specified.
2. In combination with the said driving mechanism and the said needle bar and
its needle and driver, a segmental disk shuttle rotating freely within a circular
shuttle race, and a shuttle driver which projects into and nearly fills the space
within the said race behind the heel of the shuttle, provision being made for a
limited separation of the two by the momentum of the shuttle when the under shaft
is slowed, substantially as herein before specified.
3. In combination with the said driving mechanism and the said needle bar and
its needle and driver and the said shuttle and shuttle driver, an independent take
up in the form of a lever arm actuated through the medium of a suitable cam by
the said upper shaft, and timed to let down ample thread for needle loops of the
the required size, and take up the slack when the needle loops are released,
substantially as hereinbefore specified.
4. In combination with the said driving mechanism, the said needle bar and its
needle and driver, the said shuttle and shuttle driver, and the said take up lever
arm and cam, a four motion feed actuated by the said under shaft and properly
timed, the lifting feed cam being formed in one piece with the disk of the shuttle
driver, substantially as hereinbefore specified.
5. In combination with the said hollow arm of the machine, a bearing plate held
in place by screws and serving to support the pulley end of the said upper shaft,
substantially as herein before specified.
6. A segmental rotary shuttle constructed with a weight reducing recess or
recesses between its axial bobbin chamber and peripheral guide-flange, so as to
free it partially from unequal centrifugal effect, substantially as herein before
specified.
7. The combination in a sewing machine of a reciprocating needle bar carrying
an eye pointed needle, a segmental rotary shuttle provided with a bobbin and
having a peripheral guide flange, a shuttle race having an attached cap forming a
groove to receive said flange, and a shuttle-driver projecting behind the heel of
said shuttle and constructed with a deep peripheral notch or groove in the plane of
rotation, substantially as hereinbefore specified.
8. The combination in a sewing machine of a segmental rotary shuttle having
an open bobbin chamber in its outer face and a peripheral guide flange, a shuttle
race having a screw fastened cap forming a groove to receive said flange, and con-
structed with a concentric opening to expose said bobbin chamber, a bobbin
removable at will from said bobbin chamber through said opening, and a shuttle
driver composed of a disk parallel to said race, and a projection extending into
the latter behind the heel of the shuttle, substantially as hereinbefore specified.
9. In combination with the said shuttle race, shuttle and bobbin, a bobbin-latch
and ejector attached to the shuttle as a part thereof for releasing and throwing out
the bobbin, substantially as herein before specified.
10. A bobbin-latch in the form of a rocking lever with its pivot parallel or sub-
stantially parallel to the outer face of the shuttle, and its body arranged within a
radial recess in said outer face, substantially as hereinbefore specified.
11. A bobbin-ejector in the form of a spring finger rigidly attached to the inner
end of the said bobbin-latch, substantially as hereinbefore specified.
12. In combination with the said rotary shuttle, removable bobbin and bobbin-
latch, a non rotary bobbin case provided with a circumferential flange to engage
with said latch, substantially as hereinbefore specified.
13. A bobbin case constructed with an arm comprising a pair of blade-springs,
between which the thread is drawn from the bobbin, and a screw for separating

page_text: said springs more or less to regulate the under tension, substantially as hereinbefore
specified.
14. The combination in a sewing machine of a horizontal rotary shaft beneath
the cloth-plate carry a lifting feed-cam adjacent to the parallel part of the feed-dog
and an adjacent stroke-cam, a horizontal slide actuated by the latter, a parallel
feed-bar resting on said lifting-cam, a horizontal lever arm pivoted to said bar and
engaged by said slide, and a fulcrum carried by a slide parallel or nearly parallel
to said lever arm, with the customary means for adjusting the feed fulcrum from
the top of the cloth plate, substantially as hereinbefore specified.
15. In combination with the said feed-bar and fulcrum slide a steel pin parallel
to the latter, forming at once a support for the front end of the feed bar and a
nonwearing abutment for the fulcrum-slide, substantially as hereinbefore specified.
16. In combination with the said feed-dog and feed bar a slotted horizontal
wedge and a vertical screw for adjusting the dog vertically, substantially as
hereinbefore specified.
17. In combination with a cylindrical needle-bar which slides vertically, and
with the crank wrist of a needle driving disk carried by a rotary upper shaft, and
with the head of the machine, the aforesaid deep face plate forming part of said
head, and the aforesaid needle heart and its appurtenances, substantially as herein-
before specified.
18. In combination with the said head of the machine a properly actuated take-
up lever-arm projecting at its front edge in the plane of the machine-arm or
thereabout, and an upper tension device and thread guides attached to the back of
said head, the former near its lower end, substantially as hereinbefore specified.
19. In combination with the said head of the machine and the said take up,
lever-arm, and with the presser bar within the former, a supplemental take up in
the form of a spring controlled by the motion of the said presser bar, substantially
as herein before specified...
20. A presser foot constructed with a lateral notch in its elevated rear end in
combination with a presser-bar having a screw threaded lower end constructed
with matching notches in front and rear, and provided above the same with a
milled thumb-nut, substantially as herein before specified.
In witness whereof, I, the said John Guy Wilson, have hereunto set my
hand and seal, this 12th day of October, in the year of our Lord One thousand
eight hundred and eighty one.
JOHN G. WILSON. (L.S.)