Year: 1890

page_text: discs F F F F F and F³, and outside of the right hand frame B the driving
wheel G.
To the front edge of the bed A are bolted the stands G and G' which serve as
supports for the shuttle race or bearing G³ which consists of a segment of a ring
open both in front and rear and is secured to said stands by the screws a a, said
stands having formed in their upper ends suitable bearings in which is mounted the
needle and awl carrying shaft upon which are mounted the needle carrying radius
arm c, the awl carrying radius arm d, the loop spreader e, the needle and awl stay
or guide arm with the pinion g attached there:o, the pinion h for rotating said
shaft, and the grooved collar i to serve in connection with a suitable arm engaging
therewith to impart an end wise reciprocation to said shaft for feeding the shoe or
other article being sewed.
The needle carrying radius arm c the pinion h and the collar i are firmly attached
to the shaft b so as to move therewith whether it is moved around its axis or in
the direction of its length, while the needle and awl guide f and the loop spreader e
are so mounted on said shaft as to be freely oscillated about the same and at the
same time movable in the direction of the length of said shaft in unison therewith,
and the awl carrying radius arm d is so fitted to said shaft as to be compelled to
oscillate therewith while it is free to be moved on said shaft in the direction of its
length.
To this end, that portion of the shaft on which the awl carrying radius arm is
mounted is made square and the hub of said arin has a square hole to fit. upon said
square section of the shaft, but if preferred the shaft may be made round throughout
and said arm be fitted thereto by means of a spline and key-way.
The needle arm c is preferably made in one piece with the shaft b.
An oscillating motion is imparted to the shaft b the needle arm c and the awl arm d
by means of the lever H provided at one end with the toothed segment H', and the
cam F the path c² of which acts upon a roll or stud carried by the other arm of said
lever.
The needle and awl guide or stay f has an independent oscillating motion imparted
thereto by means of the lever I having formed on one arm the toothed segment I'
which engages with the pinion g, and the cam F the path of which acts upon a roll or
stud set in the other arm of said lever as shown.
The needle arm c has formed therein near its free end a segmental groove c¹ to
receive the shank or butt of the needle which is clamped thereto by the bolt c²
provided with the large head having on its innor side a corresponding groove
to receive the other side of the needle slunk, and the nut ce all as shown in Figs. 7,
11, 12, 13, 14, and 15.
The awl d is formed in one piece with the block-like haft d² formed with the
offset d and is secured to the awl carrying radius arm by means of a screw bolt said
arm being provided with the offset and the lip which form a recess or groove
to receive said block or haft as shown in Figs. 16, 17, 18, and 19.
By this construction of the awl and needle carrying arms and the awl hatt, the
awl may be adjusted into almost close contact with the needle, or to a distance
therefrom equal to the length of the longest desired stitch.
The needle and awl guide or stay has formed in its free end a slot f¹ of sufficient
length in the direction of the length of the needle carrying shaft to permit both the
needle and awl to pass through the same when the awl is adjusted to its greatest
distance from the needle.
The stand G has bolted thereto the work supporting arm ; which has formed in
its free end a vertical slot for the passage of the needle and awl corresponding in
length to the slot in the needle and awl guide.
in
The tie girt C is formed with a forward extension
bearings for the thread carrier rod k and the presser foot bar
front side the stand J having formed therein the vertical slot
the thread guiding sheave as shown in Fig. 1.
which are formed the
and has secured to its
in which is mounted
The rod k has mounted thereon, just below its bearing in the front bar C³ of the tie-

page_text: girt C, the pinion k¹ with which the teeth of the rack bar ² engage to impart to said
bar and the thread carrier k³ secured to the lower end of said bar k an oscillating
motion about the axis of the rod k whereby said thread carrier will carry the thread
which is passed through the eye in its free end into engagement with the barb of the
needle.
The rack bar is mounted in a bearing C² connecting the front and rear bars
of the tie girt and has mounted on a stud set in its rear end a roll shown in dotted
lines in Fig. 5, upon which a cam path formed in the side of the cam disc F³
operates to impart to said rack an endwise reciprocation in a well known manner.
The bar has secured to its lower end the presser foot and has set therein
below its bearing in the bar C¹ of the tie girt Ċ the pin with which the forked
end of the lever K fulcrummed in the lower end of the pendant stand 1 engages so
that by pressing upon the handle end of the lever K with sufficient force to overcome
the tension of the spring K' said rod and presser foot may be raised from the work
when not locked.
The tension of the spring K¹ tends to force the presser foot downward upon the
work in an obvious manner.
So far the presser foot and its operation is old, but the mechanism for automatically
raising, lowering and locking the same, while operating upon somewhat the same
principle as on machines now known, is an improvement thereon in that the ratchets
are secured directly to the presser foot bar, thus doing away with the possibility of
lost motion between the presser har and the point where the lock is applied, as must
be the case when the locking is done at a distance from the presser bar and joints in
the mechanism intervene between said lock and bar.
In the present case I secure to opposite sides of the presser bar two steel bars (4
and and in their rear faces are formed ratchet teeth, with their pawl engaging
shoulders turned in opposite directions. said shoulders on bar facing downward and
those on bar facing upward as shown in Figs. 3 and 5 respectively.
Lis a lever fulcrummed on a pin 1 set in ears 17 projecting upward from the tie
girt and carrying at its rear end a roll or stud with which the cam path 18 formed in
the side of the cam disc F engages and operates to impart to said lever La vibratory.
motion about its fulcrum.
The front end of the lever L is expanded to a greater width and has pivoted
thereto upon its left side two pawls m and m' of slightly different lengths with their
free ends upward the same being mounted upon a common fulcrum pin m³ set in a
slot m³ formed in the lower part of the expanded end of said lever and adjustable
therein by means of the set screw m* as shown in Fig. 5.
Two similar pawls n and are mounted on the pin n² set in the slot n formed in
the upper part of the expanded front end of said lover L and adjustable therein by
the set scrow n said pawls n and n' being on the right side of the lever I and having
their free ends downward, and the pawis m m¹n and n¹ are presse towards the
ratchet bars and 1 by the springs m³ me n³ and no respectively.
Between the ratchet bars 141 and the front end of the lever L is the horizontal
pin m set in the upper end of the stand n and so located as to height as to be equi-
distant from the pivot pins of the two pairs of pawls when the front end of the lever L
is in the centre of its vibratory motion, and serving to throw said pawls out of
engagement with their ratchet bar at the proper time.
.
It will be seen that the cam acts directly upon one end of the lever, and the pawls
pivoted to the opposite end thereof act directly up the presser-foot-bar without the
intervention of other parts or joints, which by looseness of fits caused by wear, or
otherwise, would cause more or less lost motion tending to partially destroy the
effectiveness of the locking device.
When the rear end of the lever L is depressed by the cam path 18 one or other of
the pawls
m and m will, during the latter part of its upward movement engage a
tooth on the bar and raise the presser foot from the work in which position it is held
until the work is fed to the position for forming a new stitch, the pawls n and n
being held away from the ratchet bar by the pin m' and when the rear end of said

page_text: lever is raised by the cam path 18, the presser foot is pressed downwards by the
spring K¹, the pawls m and m¹ are forced away from the ratchet bar by the pin m
and one or the other of the pawls n n will engage, at the end of their downward
movement with a tooth of the ratchet bar to lock the presser foot against upward
movement while the needle and awl are passing upward through the material being
sewed.
M is the shuttle of the revolving hook pattern mounted in the shuttle race G³ and
having a portion of its periphery cut away to form the hook M¹ and a circular recess
in its front side to receive a bobbin or spool of thread said recess being closed by the
hinged cover M² secured in a closed position by the screw head m³ one side of which
is cut away to permit the opening of said cover.
N is the shuttle operating shaft mounted in bearings N' and N' on the bed A and
has secured to its front end a hub from the front end of which projects the curved
lip N which engages the shuttle M within the cut through its periphery so as to cause
said shuttle to partake of the oscillating motions imparted to said shaft.
So far the construction of the shuttle and the means of connecting it to the
operating shaft are the same, as have been before used, but in that case the shuttle
had an intermittent motion about its axis always in the same direction, while in this
present invention the shuttle has imparted to it an oscillating motion about its axis, to
accomplish which the shaft N has secured on its rear end the pinion N* with which
the teeth of the segment 0 on the free end of the long arm of the lever O engages
as shown in Figs. 1, 2, 3, and 5.
The lover O is fulcrummed on the pin o set in the stand 02 secured to the rear edge
of the bed A and the short arm O' of said lever carries at its upper end an anti-
friction roll o' which fits into and is acted upon by the path of of the cylinder cam E
as shown in Figs. 1, 3 and 5.
The rear face of the shuttle M has formed thereon two rearwardly projecting ribs o
and o curved concentric to the axis of revolution of said shuttle and parallel to each
other from a point at the root of the hook M to the end of ribs o said ribs being at
such a distance from the axis of the shuttle that, when the shuttle has moved about
its axis in the direction indicated by the arrow 10 on Fig. 2, a distance sufficient to
pass the hook M fairly into the loop of thread, the space between said ribs will be
directly in the path of reciprocation of the needle, and they serve, in combination
with a short forward movement of the needle at the right time as a means of casting
off the loop of thread from the barb of the needle thus dispensing entirely with an
independent cast-off device.
P is a stand bolted to the tie girt C and depending therefrom between the cam discs F
and and has pivoted to its lower end the take-up lever Pl which has mounted on
a stud set therein, a roll which is acted upon by the path in the cam disc F to impart
a vibratory motion to said lever for the purpose of taking up the slack in the thread
and drawing up the loop after the shuttle has passed through the same.
The front end of the lever P1 has formed therein a slot p in which is adjustably
secured the bolt pl which secures in position on said lever the block på which carries
in a slot formed therein the thread guiding sheave p³ as shown in Figs. 1, 2, 3 and 5.
A thread tension wheel q having a groove to receive the thread the bottom of
which is composed of a series of flat surfaces meeting each other at angles, as shown
in Fig. 21 is mounted on a pin set in the ears qq projecting upward from the tie
girt and has formed upon or secured to one side thereof a ratchet wheel g³ with the
teeth of which the teeth of the pawl ³ engage to lock said sheave against rotation
when the loop is being drawn up.
The pawl is pivoted at g* to the lever Q and extends beyond said pivot towards
the rear and beneath the set screw set in said lever in position to act upon the tail
of said pawl to adjust it against the tension of the spring set between the front
ends of said pawl and lever as shown in Figs. 1, 2, and
and the
As the take-up lever acts upon the thread between the tension wheel
work it follows that in order to make the take-up effective said tension wheel must be
locked against revolution while the loop is being drawn up and that the thread shall

page_text: not slip on the wheel, as would very likely be the case if the bottom of the groove in
said tension wheel were made smooth and concentric with its axis.
'
This end is obtained by making said tension wheel with a section, when cut through
its groove, having a series of flat sides and angles as shown in Fig. 21.
The lever which carries the locking pawl q is pivoted to ears rr on the tie-
girt and carries at its rear end the roll which rests upon and is acted upon by the
face cam 9 formed on the edge of the cam disc F³ against which it is forced by the
tension of the spring as shown in Fig. 5.
The bed A has formed on its upper surface at its right hand front corner a dove-
tailed groove the sides of which are parallel with the front edge of said bed and with
the shaft D, in which groove is fitted so as to be movable endwise therein the plate R
in the upper face of which is formed another dovetailed groove extending about one-
half the length of said plate R in which is fitted so as to be movable endwise therein
the smaller plate S.
The plate R has formed thereon or secured thereto the forked shipper arm R¹ the
forked end of which engages with the groove in the collar i as a means of imparting
an endwise movement to the shaft b for the purpose of feeding the work when the awl
and needle are within the work.
The plate S has secured thereto and movable therewith the shipper arm S¹ the
forked end of which engages with the groove in the hub of the awl carrying radius
arm d and serves to adjust said awl towards or from the needle according as a short or
long stitch is desired.
The right hand end of the plate R has secured thereto the segmental locking
ratchet R the curve of which is concentric with the centre of the stud R* set in said
plate R and upon which is fulcrummed the adjusting hand lever R the handle end of
which is provided with the spring actuated dog or pawl which engages with the
teeth of the segment R² to lock said hand lever in the position to which it is
adjusted.
The hand lever R' has formed therein at the side of its hub opposite to the handle
two segmental slots and eccentric to the axis of motion of said lever as shown in
Fig. 4.
The plate S has formed upon its upper side the block or lugs which serves as a
stop to limit the movements of said lever R by contact therewith of one or the other
of two stop pins sl and s adjustably secured in the slot as shown.
The plate S also has set in its upper side a studs upon which is mounted a roll ‚ª
which fits into and is acted upon by the eccentric slot to cause an endwise move-
ment of the plate S, and through it and the forked arm S¹ to move the awl towards or
from the needle according to the length of stitch it is desired to make.
It is obvious that when the distance of the awl from the needle is changed, the
feed of the material must be varied accordingly and as the feeding of the material is
accomplished by moving the needle and awl and their carrying shaft in the direction
of the length of said shaft while the nee fle and awl are in the work, my correspondents
have conceived the idea of so connecting the awl adjusting and feed adjusting
mechanisms that both adjustments may be made by one operation and while the sewing
is being performed.
To accomplish this I mount on a stud set in the under side of the lever R* upon the
side of its fulcrum opposite to the slots and a segmental block 78 or a roll which
fits into a curved slots formed in the upper side of the front end of the lever T
fulcrummed on the stud set in the bed A and carrying at its rear end a roll or
stud which fits into and is acted upon by the path of the cylinder cam E' to
impart to said lever Ta vibratory, motion, at the proper time, about its fulcrum pin
and said lever acting upon the truck or roll moves the lever R, the plate R, the
forked arm R', the shaft b, the radius arms c and d and the needle and awl secured to
said arms in a direction parallel to the axis of the driving shaft D.
The length of the reciprocating motions imparted to said parts depend of course
upon the throw of the cam path and the proportions of the two arms of the lever T,

page_text: and it therefore follows that if the length of the front arm of said lever T is varied
the length of feed will be likewise varied.
It will be seen upon examination that the slot is so arranged relative to the axis
of motion of the lever R that a movement of the handle end of said lever towards the
front of the machine will cause the awl to be moved towards the right or farther
away from the needle, and at the same time the block or roll is moved farther away
from the fulcrum of the lever T so that the length of the reciprocation imparted to
the needle and awl carrying shaft in the direction of its length is increased just in
proportion to the increased distance between the needle and awl.
When the lever R is to be adjusted the operator raises the handler of the dog³
to disengage it from the teeth of the segment R' when said lever may be moved about
its axis in either direction till the stop pin s¹ or s³ comes in contact with the block or
lugs when he releases the dog which engages with the teeth of the segment R³ and
locks said lever against accidental displacement.
The bed A has formed on its upper surface in the rear of the feed and awl adjusting
lever a dovetailed groove extending at right angles to the front and rear edges of said
bed in which is mounted so as to be movable endwise therein the bar or plate U
having formed upon its upper side the two upwardly projecting ears t and t¹ to the
former of which is pivoted the lever U¹ which carries at or near the middle of its
length a roll or stud shown in dotted lines in Fig. 10 which fits into and reciprocates
in the cam slot t³ formed in the plate U adjustably secured to the stand U* as shown
in Fig. 10.
The ear t¹ has pivoted thereto one end of the link t✶ the opposite end of which is
adjustably pivoted to the lower end of the lever V which is provided with the slot u,
for the purpose, is pivoted at its upper end to the stand V and carries between its
two ends a roll or stud shown in dotted lines in Fig. 10 which fits into and is acted
upon by the cam path u' of the cam disc F³ to impart to said plate U and the lever U¹
a reciprocating motion towards and from the front of the machine during which the
front end of said lever has imparted thereto by the action of the cam slot ts upon the
stud or roll a short rise and fall all as shown in Fig. 10.
To the front end of the lever U is secured the rear end of the bent looper
finger V having formed on its front end the thread engaging hook vas shown in
Figs. 4 and 10.
In the drawings the several parts of the machine are represented in Figs. 1, 2, 3, 4, 5,
and 6 in the position which they occupy when the needle has drawn out the loop
below the work to its extreme length and the needle has moved forward to its
intermediate stand still position and the shuttle has completed its passage through
the loop of thread drawn out by the needle and the take up has nearly completed the
drawing up of the loop to complete the stitch.
The needle thread w is drawn from the bobbin or spool, not shown, is passed around
the polygonal tension sheave % over the sheave p³ carried by the take-up lever P¹
thence in front of the sheave mounted in the stand J secured to the front of the
tie-girt, thence through the eye in the thread carrier arm and then through the
work or the eye or slot in the work supporting arm j.
In sewing shoes the operation is as follows:-
The shoe is presented to the machine with the sole uppermost and the welt resting
upon the work supporting arm with the front of said arm in close contact with the
upper when if the cam shaft be revolved in the direction indicated by the arrow w³ on
Figs. 3 and 5 the needle and awl complete their forward and upward movement
passing through the work, where they remain in a state of rest while the looper finger
hook seizes the thread just below the thread carrier arm kund recedes towards the
rear of the machine, and the thread carrier is partially rotated about the needle to lay
the thread into the barb of the needle, during which latter movement the shaft b with
the awl and needle are moved towards the left of the machine a distance equal to
length of the stitch to be formed carrying with it the work being sewed, and at the same
time the shuttle is being rotated backward or in the direction indicated by the arrow 12

page_text: in Fig. 2 passing in the rear of the needle and awl carrying arms c and d as shown in
Fig. 8.
When the shuttle M' has completed its backward revolution so that its hook point
is at the right of the paths of the needle and aw! the needle and awl are moved down-
ward, backward and upward drawing the loop of thread, formed above the work by
the looper finger V through the work and forming the loop below the work one
strand of which is laid into the notch or groove in the free end of the loop spreader e
which moves about the axis of the shaft b with the needle carrier until its liorizontal
arm e' comes in contact with the stop shoulder e on the lower arm of the fork of the
arm R', where it remains in a state of rest until the shuttle commences to rotate in
the direction of the arrow 10 and the hook M' of said shuttle passes above the lower
strand of said loop when said loop spreader is moved towards the front by said shuttle,
the needle and awl are moved downward and forward again until the barb of the
needle is between the ribs o³ and of on the back of the shuttle the edges of which
coming in contact with the thread of the loop on each side of the needle forces it out
of the barb of the needle and the shuttle continues its forward motion until it has
passed through the loop when the locking pawl engages with the ratchet of the
tension wheel to lock it against rotation and the take-up lever is operated to draw
up the loop and complete the stitch.
The presser foot is automatically lifted by the lever Land pawl m or m¹ while the
feed of the work takes place and is firmly locked against any upward movement by
said lever and a pawl n or n¹ while the needle and awl are passing upward.through
the work, there being a portion of the time of the revolution of the cam shaft during
which neither of the pawls m m n or n¹ are in engagement with the ratchet bars /*
or so that the presser-foot is free to be raised by the hand lever K against the
tension of the spring K for the purpose of inserting the work beneath or removing it
from the presser foot.
The operation of the mechanism for adjusting the feed and the distance of the awl
from the needle has already been sufficiently explained.
The path o of the cam disc F¹ shown in dotted lines in Fig. 3 is so formed as to
impart three distinct movements to the shaft and the needle and awl and their
carrying arins with a period of rest between them as follows, viz. :-
Starting from the extreme backward and upward positions of said parts as shown
in Fig. 6, the needle and awl are moved towards the front until they assume the
position shown in Fig. 7 where they remain in a state of rest until the shuttle has
completed its forward movement and passed entirely through the loop of thread when
the needle and awl are again moved in the same direction until they have passed
upward through the work and assumed the position shown in Fig. 8 where they remain
until the work is fed, the loop drawn out above the work and the thread carried into
the barb of the needle, and the shuttle completes its backward movement about its
axis, when said awl and needle are moved backward about the axis of the shaft b to
the starting position as shown in Fig. 6.
By this arrangement and mode of operating the needle and awl and imparting
thereto a reciprocating motion about the axis of motion to the extent of about
three-fourths of a revolution or from the position shown in Fig. 6 to the position
shown in Fig. 8 I am enabled to draw out the full length of loop of thread
required for the passage of the shuttle in its forward movement by the needle,
without the aid of other devices, and also to give the forward movement to
the shuttle while the needle and awl are in their rearmost position, or moving
from said position to their intermediate position shown in Fig. 7 and the backward
motion to said shuttle while the needle and awl and their carrying arms are
in the positions shown in Fig. 8 the result of which is that I can
run the
machine much faster and with greater ease than if the forward and backward move-
ments of the oscillating shuttle had to be completed while the needle and awl were-
at an extreme of their movement. This I consider a very important feature of the
invention.

page_text: Another important feature is the construction and arrangement of the needle and
awl carrying arms and the means of operating the same whereby I am enabled to
adjust the awl to a greater or less distance from the needle without removing the
awl from its holder and without stopping the sewing.
Another great advantage is obtained by giving to the needle two forward move-
ments with a standstill or period of rest between said two movements in combination
with the rotary shuttle having formed on its back face two parallel ribs arranged con-
centric to the axis of revolution of said shuttle and at such a distance therefrom that
when the needle is in its intermediate standstill position its point and barb are
between said ribs whereby the shuttle operates to cast off the thread from the barb
of the needle thus dispensing entirely with an independent cast off and the mechanism
for operating the same.
Having now particularly described and ascertained the nature of the said
invention as communicated to me by my foreign correspondents, and in what manner
the same is to be performed I declare that what I claim is ;-
1. In a sewing machine the combination of a rocker shaft two independent radius
arms arranged side by side upon said shaft and adjustable towards and from each
other a curved needle carried by one of said arms a curved awi carried by the other of
said arms and movable in unison with said shaft about its axis and in the direction
of its length and means having provision for adjusting said radius arms towards and
from each other.
2. In a sewing machine the combination of a needle and awl operating shaft mounted
in bearings so as to be revoluble and movable endwise therein, two radius arms
arranged side by side on said shaft one being fixed thereon and the other movable in
the direction of the length of said shaft and both revoluble therewith a curved needle
mounted in the free end of said fixed arm a curved awl mounted in the free end of the
other arm in a position by the side of and parallel to said needle a forked shipper arm
constructed and arranged to engage with the hub of the awl carrying radius arm and
a hand lever constructed and arranged to move said shipper arm and the awl carrying
radius arm in the direction of the length of the needle and awl operating shaft to vary
the distance between the needle and awl.
3. The combination in a sewing machine of a needle and awl operating shaft
mounted in bearings so as to be revoluble and movable endwise therein two radius
arms arranged side by side on said shaft one being fixed thereon and the other movable
lengthwise on said shaft and provided with a peripheral groove in its hub and both
revoluble with said shaft a curved needle mounted in the free end of said fixed arm a
curved awl mounted in the free end of the movable arm in a position by the side of
and parallel to said needle a grooved collar fixed on said shaft a sliding plate a shipper
arm carried by said plate and engaging with the grooved collar on said shaft a second
sliding plate mounted on the first mentioned plate a forked shipper arm carried by
said second plate and engaging with the groove in the hub of the awl radius arm a
hand lever mounted upon a fulcrum pin set in the first mentioned sliding plate con-
structed and arranged to act upon the second sliding plate to impart endwise motion
thereto by a movement of said hand lever about its fulcrum a lever fulcrummed upon
a pin set in a fixed portion of the machine and provided in one arm with a curved
groove to engage with a block or roll on the handle arm of said hand lever and a cam
constructed and arranged to act upon the other end of said lever to vibrate the same
substantially as and for the purposes described.
4. The combination in a sewing machine of the shaft 6 mounted so as to be movable
end wise and about its axis the arm c fixed thereon the arm & mounted on said shaft
and revoluble therewith and movable lengthwise thereof the curved needle carried by
the arm c the curved awl carried by the arm d the plate R provided with the segmental
ratchet R² the plate S provided with the lug s and the roll the shipper arms R¹ and S¹
the hand lever R* fulcrummed upon the plate R and provided upon one side of said
fulcrum with the slots and and upon the other side of said fulcrum with the block

page_text: or roll the dog or pawl the lever T provided with a curved groove to receive the
roll and at its opposite end with the roll or stud and the cylinder cam E¹ all
constructed arranged and adapted to operate substantially as described.
5. The combination in a sewing machine of a curved needle mounted in the free
end of a radius arm carried by an oscillating shaft a pinion on said shaft a lever
having formed on one arm a segment of a gear to engage said pinion a cam to act
upon the opposite end of said lever constructed and operating to impart to said
needle a forward movement in two steps with a rest between and a backward move-
ment in a single step and a rotary shuttle arranged to move in a plane at right angle
to the plane in which the needle reciprocates with its hook in position to intersect the
path of the needle and provided on its rear face with two segmental ribs concentric
with the axis of said shuttle and at such distances therefrom that the point and
barb of the needle when in its intermediate standstill position will be between
said ribs as set forth and said ribs will have cast the thread off from the barb of the
needle.
6. The combination in a sewing machine of a curved needle mounted in the free
end of a radius arm carried by an oscillating shaft a pinion on said shaft a lever having
on the free end of one arm a toothed segment to engage said pinion a cam to act
upon said lever constructed and operating to impart to said needle a forward move-
ment in two steps with a period of rest between said steps and a backward movement
in a single step with a period of rest between the forward and backward movement a
reciprocating rotary shuttle a shuttle operating shaft having mounted thereon a pinion a
lever having a toothed segment on the free end of one arm thereof to engage said pinion
and a cam to act upon said lever constructed and operating to impart to said shuttle a
complete revolution in a forward direction and a corresponding backward movement
with a standstill at the end of each movement said movements being so timed that
the forward movement of the shuttle takes place while the needle is, at or in the rear
of its intermediate standstill position and the backward movement of the shuttle
takes place while the needle is in a state of rest at the extreme of its forward and
upward movement.
'
7. The combination with the shaft b the needle arm c fixed thereon the needle o
the bolt c³ provided with the clamping head ct of the awl arm d movable lengthwise
on said shaft and provided with the offset d and the lip d and the awl d¹ formed in
one piece with the block like haft a provided with the offset ds and secured to the awl
arm by a screw bolt whereby said awl is adapted to be adjusted into close proximity
to or away from said needle.
8. In combination with the presser foot bar two ratchet bars secured thereto upon
opposite sides thereof with the pawl engaging shoulders on one facing downwards
and on the other upwards a lever carrying on its front end a pawl or pawls arranged
to engage at the proper times with the teeth of each of said ratchet bars a cam to
act upon the rear end of said lever and impart thereto a vibratory motion and a guard
pin constructed and arranged to retract said pawls from engagement with said ratchet
bars during a portion of the time of each revolution of the cam shaft.
9. The combination of the needle carrying and operating shaft a radius arm fixed
thereon a second radius arm mounted upon and revoluble with and movable endwise
of said shaft a curved needle mounted in the free end of said fixed arm a curved
awl mounted in the free end of said movable arm in a position by the side of and
parallel with said needle a forked shipper constructed and arranged to engage with
the hub of the awl radius arm a pivoted hand lever engaging with said shipper to
impart motion thereto a pawl or dog mounted upon the handle end of said hand
lever and a ratchet constructed and arranged to be engaged by said pawl or dog to
lock said hand lever and through it the awl against accidental displacement.
10. The thread tension wheel q having a thread receiving groove the bottom
of which is polygonal or composed of a series of flat sides meeting each other
at angles.
11. The thread tension wheel 7 having a polygonal section between its flanges and
provided at one end with a ratchet wheel in combination with the lever the pawl q³

page_text: pivoted thereto the set screw, the spring and the cam q7 all constructed and
arranged to operate substantially as described.
12. In combination with the needle carrying and operating shaft and a revolving
shuttle the stands G G detachably secured to the front of the bed by suitable bolts and
having formed in their upper ends bearings for said shaft and in their.inner sides bearing
surfaces to fit the shuttle raceway the raceway G' made in the form of a segment of
a ring and fitted between and supported by said stands and the screws a a for securing
said raceway to said stands.
13. In combination with the needle carrying and operating shaft of a sewing machine
and a revolving shuttle the stands G' and G detachably secured to the front of the
bed of the machine by suitable bolts and having formed in their upper ends bearings for
said shaft and bearing surfaces upon their inner sides to receive the shuttle raceway
and one of said stands being provided with a bearing to receive the work support
the shuttle raceway G³ made in the form of a segment of a ring and fitted between
and supported by said stands the screws a a for securing said raceway to said stands
and the work support; detachably secured by a bolt or screw to one of said stands
substantially as described.
Dated this 15th day of July 1890.
W. P. THOMPSON & BOULT,
Agents for the Applicant.