IMPROVEMENTS IN SEWING MACHINES
Year: 1876

page_text: LETTERS PATENT to William Robert Lake, of the Firm of Haseltine, Lake,
& Co., Patent Agents, Southampton Buildings, London, for the Invention of
"IMPROVEMENTS IN SEWING MACHINES." A communication from abroad by
Jesse Folk, of Brooklyn, New York, United States of America, Gentleman.
aled the 17th March 1876, and dated the 4th January 1876.
PROVISIONAL SPECIFICATION left by the said William Robert Lake at the
Office of the Commissioners of Patents, on the 4th January 1876.
WILLIAM ROBERT LAKE, of the Firm of Haseltine, Lake, & Co., Patent Agents,
Southampton Buildings, London. "IMPROVEMENTS IN SEWING MACHINES." A com-
munication.
The first part of this Invention comprises a novel combination of a needle
operating shaft constructed with double cranks, and a primary or driving shaft
provided with double excentrics connected by rods with the said double cranks,
whereby a positive, steady, and uniform rotary motion is secured to the needle shaft.
Also a novel combination of a crank link and pitman with the needle shaft and
needle bar, whereby the requisite variation in the rectilinear movement of the
needle bar is provided for.
Also a novel combination of a reciprocating gripping device with the needle
shaft, the tension plate, and the needle bar, whereby a simple and efficient take-up
mechanism is secured.
Also the combination of an upper and a lower feed motion acting in conjunction
with each other to clasp the fabric between them, and to feed the same with a
positive grip and movement.
It also comprises a novel combination of a tubular fulcrum screw with a feed
actuating lever operated direct from the needle shaft, whereby the length of move-
ment of the upper feed mechanism may be readily and accurately adjusted.
Also a novel combination of a looper with the rotating hook or shuttle, the
bobbins, and an eye pointed needle, whereby the thread from the bobbin instead of
the thread from the needles is carried around the bobbin by the hook or shuttle,
thereby avoiding the necessity for the repeated drawing of the thread through the
fabric, and the wear and abrasion of thread resulting therefrom and permitting the
use of a bobbin of more than the usual size and capacity.
It further comprises certain novel combinations of parts for giving operative
movement to the under feed mechanism, the looper and other devices including the
combination of a slide with one of the excentrics, the elbow lever and looper, and

page_text: the combination of another slide elbow lever and excentriC WICH WOUL
motion.
Also a pivoted adjustable bar made oblique at its free or outer end in com-
bination with the said elbow lever and looper.
The said Invention also relates to a method of forming a sewing machine stitch
by means of a looper passing through the-needle loop, and a hook or shuttle passing
behind the needle loop and through the secondary loop of the loopers.
Another part of this Invention more especially relates to mechanism for making
the single thread or chain stitch, but some of its features may be used in double
thread machines. It comprises the combination with the rotating hook of the device
known as the "Wheeler & Wilson" hook, or of a supplemental hook arranged to
open the loops from the needle as the same is carried around by the said rotating
hook, and to retain said loop in its open condition until the needle bas carried the
succeeding loop therethrough, whereupon the supplemental hook casts off the thread,
and the stitch is formed by the tightening of the latter, the chain stitch being by
this means rapidly and effectively formed by mechanism simple, strong, and durable.
This part of my Invention further comprises a curved tooth so provided upon the
rotating hook and in relation to the needle, as to guide the loop to the front or face
of the rotating hook in order that at the proper time the said loop may be readily
cast off preliminary to the formation of the stitch, the casting off of the thread from
the rotating hook at an earlier stage of the revolution than has bitherto been
possible being by this means secured.
This part of the said Invention further comprises a guide spring so arranged in
relation to the needle and the rotating hook aforesaid, as to prevent the thread from
being thrown outward from its requisite range with the curved guide.
It further comprises a brushing device at or near the top of the rotating hook,
and in such relation to the supplemental hook that the premature slipping of the
thread from the rotating hook and from the supplemental hook is effectually
prevented.
It further comprises a novel combination of a brush stem with a brush holder,
whereby the retention of the brush in requisite position with regard to the rotating
hook is provided for.
Another part of this Invention is designed to provide a sewing machine, that in
the needle operating mechanism, its feed mechanism, its stitch forming mechanism,
and its driving or operating mechanism shall combine in an eminent degree the
desiderata of simplicity, strength, non-liability to derangement, ease, and con-
venience in use, and adaptability to many different varieties of work.
This part of my Invention comprises a jointed connecting rod of peculiar
construction and connecting the needle bar with the crank, giving movement to the
said bar, whereby practically a cessation or lost motion of the needle bar at the
upper end of the stroke is secured to afford time for the operation of the rotating
hook in the formation of the stitch.
It also includes a novel combination of the feed, whereby the same is enabled to
feed the fabric to the needle in either of two opposite directions, as may be desired,
and whereby less strain of the fabric is caused than in the operation of the feed of
sewing machines hitherto devised.
It further includes a novel take-up mechanism comprising two vibrating levers
and two stationary guides, the levers being actuated by the movement of the needle
bar, and the whole combined to take up the thread at the completion of each stitch
by an expanding or spreading motion of the levers between the stationary guides.
Also a novel combination of a thread detainer with the take-up mechanism,
whereby the thread is kept from unwinding from the spool by the tension exerted
in taking-up the thread of each stitch at the completion thereof
Also a novel combination of two excentrics working in unison and connected with
the feed so timed, as to give a compound, longitudinal, and vertical movement to
the feed in the operation of feeding the fabric to the needle.
It further comprises a novel combination of an excentric or connecting rod and a

page_text: pivoted link with the feed, whereby the requisite smooth and easy longitudinal
movement of the feed is provided for.
Also combinations of parts whereby the feed may be readily adjusted for any
desired length of longitudinal stroke or movement, so that the vertical movement
of said feed is made positive without jarring or concussion, the required unison
in the longitudinal and vertical movements of the feed is provided for, and the
twisting of the thread ordinarily experienced in lock stitch rotary hook machines is
obviated.
Also a novel combination of excentrics and connecting rods with the needle
actuating shaft of a sewing machine, whereby a firm and substantial means for
transmitting motion to said shaft without jarring, concussion, or liability to wear
loose are secured.
It further comprises a novel combination of parts whereby provision is made for
the greater stability of the primary driving mechanism of the machine, and for the
adjustment of the tension exerted upon the band forming part of said driving
mechanism.
This part also includes the combination of a pivoted link rod and excentric with
the feed, whereby the requisite free, smooth, and positive longitudinal movement of
the feed is provided for.
Also a socket provided with a screw in combination with the said link rod,
excentric, and feed, whereby the throw of the link, and consequently the length of
longitudinal movement of the feed may be adjusted.
Also a strap on one of the excentrics pivoted to the arm of the feed, whereby a
positive vertical movement without jar or concussion is secured to the feed.
Another excentric having its strap pivoted to the said arm of the feed in com-
bination with the first excentric actuating the link through the medium of the rod,
the whole constructed and combined to provide for the requisite unison in the
longitudinal and vertical movements of the feed.
It also comprises a hook constructed with a lip or shoulder and notch terminating.
in a sloping recess, so constructed and combined that the inner side of the loop
will be carried behind and the outer side before the bobbin, and the loop formed
without twisting the thread.
It further comprises the combination with the needle actuating shaft of a sewing
machine of the excentrics and rods, a crank arm on the end of the treadle rock shaft
with a rod and a band wheel pivoted upon the adjustable lever.
Another part of this Invention comprises a novel combination of a vibrating rod
and rocking arm, with a crank on the primary shaft of a sewing machine, and a
link connected by a crank with the needle actuating shaft, whereby I secure a
pause of cessation in the motion of the needle at the end of the downward stroke
thereof to insure time for the passage of the shuttle through the needle loop.
This part of the said Invention further comprises the combination with the
needle of a sewing machine of a revolving or traversing shuttle in an annular race
way and having a positive movement, whereby an extremely efficient operation of
the shuttle is secured.
Also a novel combination of a revolving arm with the traversing shuttle aforesaid,
whereby the requisite positive movement is given to the same.
It further comprises one or more operating shafts formed in two parts or sections
placed excentrically to each other, and connected by a link or other like yielding
connection in combination with the stitch forming mechanism of a sewing machine,
whereby a differential movement may be given to the shuttle or needle or both to
secure perfect unison in the operation of the said needle and shuttle.
It further comprises the combination of two crank pins and a connecting link,
with the eccentrically arranged parts of a divided primary shaft giving positive
motion to the revolving shuttle, whereby the speed of said shuttle is caused to vary
at different portions of its revolution to act in proper unison with the other parts of
the stitch forming mechanism.
It further comprises the combination of a crank pin and transverse slide with the

page_text: eccentrically arranged parts of the divided shaft, whereby the speed of the needle at
various portions of its ascent and descent is made to vary to insure its perfect
unison with the movements of the shuttle feed and take-up mechanism.
It further comprises the combination of external steadying springs with the
revolving shuttle and its circular race way, whereby the shuttle is enabled to move
without noise, jarring, or undue friction.
Also a novel combination of parts for giving the requisite positive travelling
movement to the shuttle.
Also a novel construction of the said shuttle with a tubular stem and its enclosed
bobbin, whereby easy access to the bobbin is provided for, and whereby a proper
tension to the shuttle thread and its facile delivery from the shuttle is secured.
It further comprises a novel combination of parts constituting a take-up
mechanism, whose lever is operated direct from the crank of the needle actuating
mechanism, and which provides simple and efficient means for taking up or
tightening the thread in the completion of the stitch.
Also a novel combination of parts relating to the feed and designed to insure the
most effective operation of the same.
Another part of the said Invention is designed to provide a feed for sewing
machines, which will feed the fabric to the needle without the abrading action
thereon incident to the use of the feed mechanism hitherto devised, and which in
addition to this will give a positive movement to the fabric during the operation of
feeding.
This part of the said Invention comprises a feed constructed with annular
projections or needle points, that in the operation of the device pass between the
fibres of the fabric and move it along without any compressing or gripping action,
thereby securing the object sought.
Also certain novel combinations of parts adjunctive to the main feature just
indicated of my said Invention, and aiding the same in its most effective and
efficient application to use.
The last named combinations include a presser foot, grooved or slotted, and the
feed constructed with the said projections or needle points.
Also the feed constructed with a plate and screw arranged in relation to the said
tapering needle points.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by the
said William Robert Lake in the Great Seal Patent Office on the 30th June
1876.
WILLIAM ROBERT LAKE, of the Firm of Haseltine, Lake, & Co., Patent Agents,
Southampton Buildings, London. "IMPROVEMENTS IN SEWING MACHINES." A com-
munication to me from abroad by Jesse Folk, of Brooklyn, New York, United
States of America, Gentleman.
The fisrt part of this Invention comprises a novel combination of a needle
operating shaft constructed with double cranks, and a primary or driving shaft
provided with double eccentrics connected by rods with the said double cranks,
whereby a positive, steady, and uniform rotary motion is secured to the needle shaft.
Also a novel combination of a crank link and pitman with the needle shaft and
needle bar, whereby the requisite variation in the rectilinear movement of the
needle bar is provided for.
Also a novel combination of a reciprocating gripping device with the needle
shaft, the tension plate, and the needle bar, whereby a simple and efficient take-up
mechanism is secured.
It also comprises a novel combination of a tubular fulcrum screw with a feed
actuating lever operated directly from the needle shaft, whereby the length of
movement of the upper feed mechanism may be readily and accurately adjusted.

page_text: bobbin, and an eye-pointed needle, whereby the thread from the bobbin instead of
the thread from the needle is carried around the bobbin by the hook or shuttle,
thereby avoiding the necessity for the repeated drawing of the thread through the
fabric and the wear and abrasion of thread resulting therefrom, and permitting the
use of a bobbin of more than the usual size and capacity.
It further comprises certain novel combinations of parts herein-after described.
In the accompanying Drawings,―
Figure 1 is a longitudinal vertical section of a sewing machine made according to
this part of my Invention on the line x, x, Figure 3.
Figure 2 is a front view and a partial section of the same on the line y, y,
Figure 1; Figure 3 is a horizontal sectional view on the line z, z, Figure 1.
Figure 4 shows the lower feed mechanism of the same detached.
Figure 5 shows the upper feed mechanism detached and in section on the line 8, 8.
Figure 6.
Figure 7 is a view of the top feed plate.
:
Figures 6 and 8 are views of the tension devices.
Figures 9 and 10 are views of the needle driving mechanism.
And Figure 11 is a view on an enlarged scale of the two threads forming the
stitch made by my said machine.
A is the primary or driving shaft of the machine provided with two eccentrics
B, B, arranged with their lines of greatest radius at say right angles to each other;
C is the needle operating shaft, upon the rear end of which and in the same vertical
planes with the eccentrics B, B, are two cranks B', B¹, set like the eccentrics at an
angle to each other, and each crank connected with the coincident eccentric by a
rod C. By turning the driving shaft A a steady and continuous rotary motion is
transmitted to the needle shaft C. The front end of said needle shaft carries an
eccentric A¹, the surrounding strap a of which is connected with a sliding bar B¹¹,
the upper end of which passes through a hollow screw C¹¹, seated in the supporting
arm D; this screw C" forms a guide for the upper end of the bar B". The upper
part only of the bore of the said screw is in contact with the bar B1, and thereby
forms a fulcrum for the upper end of said bar in the rocking movement thereof,
when moved up and down by the eccentric A. By adjusting the screw C" higher
or lower the degree of swing or vibration of the lower extremity of the bar may be
made greater or less as may be required; the said lower end of this bar B being
connected with the upper feed motion as herein presently explained:-Affixed to
the arm D is a plate b slotted at a¹ to permit the upper end of the bar B1 to pass
therethrough, and having also two small holes b₁, c¹. Upon the upper extremity
of the bar B is an adjustable sleeve B*, the flat under surface of which is
designed to come down snugly upon the plate b when the bar B" is depressed by
the action of the eccentric A². The spool A" being arranged in the usual manner
and position the thread c is carried therefrom, first up through the hole b¹ of the
plate b, then across the upper side thereof, then down through the hole c¹, and
thence through a hole e¹ in the upper end of the needle bar E, from which it
is passed downward to the eye of the needle and through the same in the usual
manner. Upon the extreme end of the needle shaft C, outside of its eccentric A',
is a disc D provided with a crank pin d which connects by a pitman or
connecting rod F and link F¹ to the needle bar E. The rotation of the said needle
shaft therefore gives the requisite reciprocating movement to the needle bar, the
link F¹ at each end of the stroke of the needle bar swinging upon the pivot by
which it is connected to said needle bar, the needle bar being thus caused to
have a certain degree of lost motion during its downward stroke to permit the
looping of the needle thread. The needle bar E and the sliding bar B¹, being
both actuated directly from the needle shaft C are made to move in unison, the
bar B being depressed at the period of the stroke of the needle bar E when the
latter is about to withdraw from the fabric. This downward movement of
the bar B¹¹ causes the sleeve B* to be pressed down upon the plate b, clasping the.

page_text: thread firmly between the said sleeve and plate, until the strain exerted upon the
thread during its withdrawal is made to cease. By these means the proper with-
drawal of the thread from the fabric by the upward or return stroke of the needlo
is provided for; the clasping of the thread preventing the strain from drawing
more thread from the spool, instead of drawing the thread already passed to the
fabric therefrom. G is the upper feed motion or device attached to the lower end
of the sliding bar B, as herein-before indicated and arranged over the lower feed
motion G¹, which is attached at f to a transverse slide H arranged in suitable
guides in the frame of the machine, as the compound vibratory and rectilinear
motion of the bar H is given thereto by the eccentric J, the upper feed motion G
is brought down to act in conjunction with the lower feed motion G₁ to give the
requisite feed to the fabric, the fabric being clasped firmly between the two while
being fed forward so that a positive holding action is exerted upon the same, the two
feed devices being then moved apart and backward preparatory to repeating the
operation. The upper feed motion G must of course move in unison with the
lower feed motion G¹. The latter is made elastic with a tendency to spring down-
ward. Upon the under side of the slide H is pivoted an elbow lever I, the free
end g¹ of which rests in contact with the circumference of the eccentric J on the
front end of the primary or driving shaft A, so that the rotation of the latter, at
the proper period in its revolution, will first press outward the free end of the
lever to lift the feed motion G¹, and then continuing its action (and the lever
striking the slide so as to exert no further lift upon the feed motion G₁ aforesaid)
moves the slide and the feed motion G¹ carried thereby to the requisite extent, and
with a movement coincident with that of the upper feed motion G.
When the movement in one direction is accomplished, the eccentric ceasing to
exert any further outward action on the lever, the slide and consequently the lower
feed motion carried thereby are returned to their previous positions by a spring K.
Lis the bobbin fitted to the front of the rotating hook or shuttle M, which may
be of the well-known " Wheeler and Wilson" form. In front of the bobbin is the
retaining shield I held in place by the bracket J¹. This shield has an inwardly
projecting axle upon which the bobbin is pivoted or journalled, in order to avoid
the wear upon its periphery experienced with the ordinary bobbin. To the front
of the bracket is affixed the lower extremity of the looper N. The upper end of
the latter is eye pointed, as shown at f1, and the looper being elastic has a ten-
dency to spring outward from the plane of rotation to the hook M.
K' is a
horizontal elbow lever pivoted at all, with one end pivoted of one extremity of a
slide K¹, and the other brought opposite the looper Ñ. Upon this last indicated
end of the elbow lever is a short pivoted bar m, the end of which intended to bear
against the looper is made oblique, in such manner that by turning the said
pivoted bar it may be brought in contact with the looper at an earlier or later
stage in the movement of the elbow lever, thereby enabling the inward throw,
herein-after described, of the aforesaid looper to be regulated or adjusted at will.
The elbow lever is actuated to thus move inward the looper by means of a spur M',
which projects downward from the slide K¹ in contact with an eccentric N¹, upon
the driving shaft. The eccentric N¹ having moved the slide K¹ in one direction to
actuate the looper with an inward movement, the reverse movement of the slide,
and consequently of the elbow lever K³ is produced by a spring R. The elasticity
of the looper itself brings the said looper out of the path of the hook or shuttle
when released from the action of the elbow lever aforesaid.
In the operation of this machine the thread c from the spool A" is carried to
and through the needle, as herein-before explained, and the thread n from the
bobbin L is carried to and through the eye f¹ of the looper N. The descent of the
needle through the fabric and its initial retraction forms the usual loop upon the
under side of the fabric; this done the looper is moved inward, carrying the bobbin
thread n through the loop formed as aforesaid by the needle thread. The hook or
shuttle M then passes behind the said loop of the needle thread, and catches the
secondary loop formed by the bottom thread, and carries the same around in sub-

page_text: stantially the same manner as the loop of the needle thread is carried around by
the hook in the ordinary "Wheeler and Wilson" sewing machine. The loop finally
passing from the hook the subsequent tension upon the threads tightens the same,
and forms the stitch represented in Figure 11. It will be seen that by thus
carrying the bobbin thread from the looper around the bobbin the wear of the
needle thread, due to the abrasion of repeated passings through the fabric and
around the bobbin, is entirely obviated, and also that space is afforded for a bobbin
of much more, than ordinary size, and consequently of greatly increased capacity;
furthermore, the bobbin, revolving on an axial pivot instead of trundling on its
edges, is not only kept from any circumferential wear, but is made to permit the
very easy reeling of the thread therefrom.
The second part of this Invention more especially relates to mechanism for
making the single thread or chain stitch, but some of its features may be used in
double thread machines. It comprises the combination with the rotating hook of
the devices known as the "Wheeler and Wilson" hook, or of a supplemental hook,
arranged to open the loop from the needle as the same is carried around by the said
rotating hook, and to retain said loop in its open condition until the needle has
carried the succeeding loop therethrough, whereupon the supplemental hook casts
off the thread, and the stitch is formed by the tightening of the latter, the chain
stitch being by these means rapidly and effectively formed by mechanism simple,
strong, and durable.
This part of my Invention further comprises a curved tooth so provided upon
the rotating hook, and in relation to the needle, as to guide the loop to the front or
face of the rotating hook, in order that at the proper time the said loop may be
readily cast off preliminary to the formation of the stitch, the casting off of the
thread from the rotating hook at an earlier stage of the revolution than has hitherto
been possible being by this means secured.
This part of the said Invention further comprises a guide spring so arranged in
relation to the needle and the rotating hook aforesaid as to prevent the thread from
being thrown outward from its requisite range with the curved guide.
It further comprises a brushing device at or near the top of the rotating hook,
and in such relation to the supplemental hook, that the premature slipping of the
thread from the rotating hook and from the supplemental hook is effectually.
prevented.
It further comprises a novel combination of a brush stem with a brush holder,
whereby the retention of the brush in requisite position with regard to the rotating
hook is provided for.
This part of my Invention is illustrated in Fures 12 to 17 of the Drawings.
Figure 12 is a front elevation of sewing machine mechanism made according to
this part of my Invention; Figure 13 is a front view of a portion of the same,
showing the parts in somewhat different positions; Figure 14 is a detached sec-
tional view of the saine; Figure 15 shews the chain stitch made by means of this
part of my Invention; Figures 16 and 17 are sections of modifications of Figure 14.
In these Figures A is the usual eye-pointed needle actuated in any suitable
manner; B is the rotary hook constructed and operated in any appropriate manner,
as, for example, in the well-known "Wheeler and Wilson" machine; C is the
supplemental hook fixed at the centre or axis of the rotary hook B, as shown
at a, and projecting in a curvilinear path, more or less radially from the said axis,
as represented in Figures 12 and 13, and also curved outwardly from the face or
outer surface of the rotary hook B, as shewn in Figure 14; C¹ is a curved spur
tooth or guide, which is curved inward from the periphery of the rotary hook
towards the axis thereof, as shewn in Figures 13, and midway between the inner
surface of the nose a¹ of the rotary hook and the back c¹ of the said hook, there
being a space or slot between the nose a¹ of said hook on one side and the back c¹
of the aforesaid rotary hook, and that part of the said guide at the periphery of
the rotary hook, projecting beyond the same, with a slope toward the face of the
said hook, as shown at e; D is a spring attached to the under side of the plate E,.

page_text: and arranged in front of the needle. This spring may be made of elastic wire, and
is so arranged that when the needle loop is formed during the downward stroke of
the needle the spring will press back the thread or the rotating hook behind the
needle and the path of the said rotating hook, in order that the said hook may not
pass into the needle loop already formed, but into the one succeeding; G is the brush
holder, in which is fixed the supporting stem I of a brush or pad K, arranged not
lower than the axis of the rotating hook, but arranged to rest thereon at or near its
top, its functions being not only that of the ordinary brush, but also that of retaining
the thread upon the supplemental hook to the requisite degree until it passes
therefrom in the completion of the stitch.
It will be seen that the brush K being provided with the stem I inserted in the
holder G, which is attached in the same manner as the ordinary brush holder the
brush itself is brought to the top of the rotary hook, thereby ensuring the advan-
tages herein specified, and which are not attainable with a brush devoid of a stem,
and arranged in the usual manner.
In the operation of this machine the downward movement and slight retro-
gression of the needle form the usual loop. Thereupon the rotary hook enters the
loop and carries it around the guide C₁, throwing the loop forward upon the face of
the aforesaid hook, and the supplemental hook C passes through the loop as it is
taken upon and around the rotary hook, as aforesaid, and opens or spreads the said
loop for the needle to enter the same with the succeeding needle loop, the first-
named needle loop being pressed back behind the needle by the spring D to permit
the passage of the needle through the succeeding loop, the final casting-off of the
thread from the supplemental hook C permitting the same to tighten and form one
of the chain stitches of which the seam made by the machine is composed.
When desired the supplemental hook C may be made detachable, as represented
in Figure 14, in order that when desired the said supplemental hook may be taken.
out, and a bobbin and suitable adjuncts may be arranged in the proper relation to
the rotary hook to make a double thread or lock stitch; or when preferred the
rotary hook may be made with a recess securing the stem of the supplemental
hook, and may be otherwise secured, so that the supplemental hook may be pushed
inward out of the way for the attachment of the bobbin, as shown in Figure 17.
When desired the supplemental hook C may be used in connection with an
"elliptic" book, so termed, used in lieu of a rotary hook for the same purpose.
The third part of this Invention is designed to provide a sewing machine that in
its needle operating mechanism, its feed mechanism, its stitch forming mechanism,
and its driving or operating mechanism, shall combine in an eminent degree the
desiderata of simplicity, strength, non-liability to derangement, ease and con-
venience in use, and adaptability to many different varieties of work.
This part of my Invention comprises a jointed connecting rod of peculiar con-
struction, and connecting the needle bar with the crank, giving movement to the
said bar, whereby practically a cessation or lost motion of the needle bar at the
upper end of the stroke is secured, to afford time for the operation of the rotating
hook in the formation of the stitch.
It also comprises further improvements herein-after described.
This part of my said Invention is illustrated in Figures 18 to 25, in which
Figure 18 is a front elevation of a sewing machine made according to my In-
vention; Figure 18 is a detached view on a larger scale of one part of the said
machine; Figure 19 is a rear elevation of the machine shewn in Figure 18;
Figure 19 is a detached view of certain parts included in Figure 19; Figure 20 is
an elevation of one side of the said machine; Figure 21 is a like elevation of the
opposite side; Figure 22 is a plan of the same; Figure 23 shews detached certain
parts of the said Invention; Figures 23 and 23b represent certain of the parts
detached Figures 24 and 25 are edge views of the rotating hook included of the
said Invention.
j
In these Figures A is the needle bar, arranged for vertical movement in the usual
guides. Bis the needle actuating shaft, upon the front end of which is a disc A¹

page_text: provided with a wrist pin, which constitutes the crank a. C is a jointed rod con-
necting the crank a with the needle bar A. This rod C is made in two parts a¹, b¹,
the upper part a' attached to the crank a being necessarily longer than the lower
part attached to the needle shaft A, in order to secure the proper operation of
the device, as herein-after explained. The joint a¹¹ is formed by a suitable pivot
arranged in a line parallel with the needle actuating shaft, in order that the upper
part u may move in a plane parallel with that traversed by the crank a.
All is a
rod pivoted or hinged at its outer end 611 to a fixed support, and at its inner end in
the joint a¹ of the rod C. The function of this rod A" is to keep the lower
part of the rod C upright, and more or less parallel with the needle bar, and
when preferred it may be replaced, for example, by a pin projecting from the upper
end of the said part b¹ or from the joint all, and playing in a fixed vertical guide,
that in such case would be provided contiguous thereto.
The needle driving shaft when securing the usual rotary motion acts through the
crank a and jointed rod C to give the requisite rectilinear motion to the needle bar,
but with this peculiarity, that as the crank reaches the upper portion of the circle
described in its revolution, thereby bringing the joint a near the axis of motion of
the crank, this motion is exerted, not in giving further movement to the needle bar,
but merely in turning the upper part al of the rod C upon the lower part b' around
the joint a¹¹, thereby causing a lost motion or appreciable cessation in the move-
ment of the needle bar, which at the end of the upward stroke of said bar affords
time and opportunity for the rotating hook to perform its function before the next
descent of the needle to the fabric.
In a rotating hook machine the upper part of the jointed rod C must be the
longest, but in a shuttle machine this comparative length must be reversed, the
upper part being in such case shorter than the lower. P₁ is a lever pivoted at the
rear extremity to a fixed support c¹¹, and projecting forward through a sleeve d",
which is formed upon and across the outer end of a collar ell placed loose upon a
laterally projecting stem c on the top of the needle bar A. C¹ is another lever
passing through a rocking hub, shown at f" with the long arm projecting forward,
its short arm being provided with a sleeve gl loose upon the stem c of the needle
bar, preferably over the collar e¹¹ on the said stem. In the forward extremities of
the two levers B¹, C¹, are small holes, eyelets, or guides all, and similar holes,
eyelets, or guides 6 are provided in the adjacent outer ends of two fixed arms D¹
The thread from the small spool D is passed through the tubular guide D under-
neath the retaining device E, herein-after described, thence in succession through
the eyelet 1 of one of the fixed arms D¹, the eyelet all of the lever C¹, the
corresponding eyelet all of the lever B¹, and the eyelet of the second arm D¹,
whence it is carried downward and passed in the usual manner through the eye of
the needle d in the lower end of the needle shaft. The thread detainer E is con-
stituted by an arm e upon the upper end of a rod f, the lower end of which is
connected by a suitable strap with an eccentric g, which at proper intervals lifts
and depresses the said thread retainer E, the eccentric being provided on the needle
actuating shaft B.
During the first portion of the downward stroke of the needle bar the eccentric
brings the thread retainer E down upon the thread, thereby preventing the
drawing of the thread from the spool during the operation immediately succeeding.
Simultaneous with this holding of the thread the movement of the needle bar
brings downward the forward end of the lever B¹ and upward the corresponding
end of the other lever C¹. This spreading apart of the two levers between the
fixed eyelets 611 of the arms D¹ draws up the thread left loose in the formation of
the previous stitch (said stitch being formed by the mechanism herein-after
described) and by tightening said stitch completes the same. This done the
thread retainer E is lifted, and the further forward movement of the needle bar in
the formation of the succeeding stitch draws the requisite further supply of thread
from the spool. F is a primary shaft connected with and transmitting motion to
the needle actuating shaft, as herein-after explained. Upon the front end of this

page_text: shaft are two eccentrics m and n. G is the feed, the serrated or roughened
.portion m¹ of which projects through a suitable opening in the plate or tablet Bl
and is situated in the usual relation to the presser foot r*. The shank r of the
feed is fitted into a guide n¹ in such manner as to permit a vertical or vibrating
movement of the opposite or roughened part in the feed, and also of a longitudinal
movement of the entire feed G. Projecting downward and laterally from the just
indicated part m³ is a curved arm 8, which is connected with the excentric n by a
strap s¹ surrounding the said eccentric and pivoted to the arm 8, as indicated at 11.
It will be seen from this that the rotation of the eccentric 8 will alternately lift
and depress the part ml of the feed to and from the presser foot in order to
grasp and retain the fabric between the surface m¹ of the feed G and the under
side of the presser foot during the operation of feeding.
The excentric m carries one end of a rod H, the opposite end of which is
provided with a socket I, through which is passed a curved link J, the lower end
of the latter being fulcrumed or pivoted to a fixed support at p, and its upper end
being connected by a rod K with the feed G. The outer end of the rod H is, by
means of the socket I, adjustable to any point on the length of the link J, the
socket being held wherever placed on the link by the pointed inner end of a
tightening screw I, which, working through a nut formed in the outer side of the
socket, not only holds the latter and consequently the outer end of the rod H in
place, but also permits a slight rocking movement of the aforesaid rod H at the
place of its connection with the link J. The eccentric m, by giving a longitudinal
movement to the rod H communicates a vibrating movement to the link J, and
the latter being connected with the feed G, as herein-before explained gives a
longitudinal movement to said feed. This longitudinal movement of the feed
being coincident with its vertical movement produced by the rotation of the
eccentric n, a positive compound movement is communicated to the feed which
insures the most efficient operation of the feeding of the fabric to the needle. The
teeth of the roughened surface of the feed are vertical instead of inclined, as
shown more plainly in Figure 18ª, inasmuch as from the character of the feed it is
enabled to feed in either direction. By adjusting the socket I at a greater or less
distance from the point or fulcrum of the link J the swing or throw of the said
link, and consequently the extent of the longitudinal movement of the feed may
be readily adjusted as desired.
The primary shaft F and the needle actuating shaft B are each provided at the
rearmost end with two excentrics F¹, G¹, set with their lines of greatest radius at
or nearly at right angles to each other, the eccentrics of the one shaft being in the
same planes as those of the other. The eccentrics F¹ are connected by a rod H¹
with suitable straps k at each end, and the eccentrics G¹ are connected in like
manner by a rod I" and straps k¹. In order to diminish the friction of the straps
upon the eccentrics steel rings 11 may be interposed around the eccentrics and
within the straps, as represented in Figure 19ª.
By rotating the primary shaft the two eccentrics thereon act alternately in
communicating motion to those on the needle actuating shaft, and consequently
rotate the latter, this mechanism being firm and solid, and free from jar and noise,
and hence aiding materially the proper woking of the machine. K¹ is the treadle,
which is attached to a rock shaft L, whose outer end has a crank arm M connected
by a rod M¹ with the crank pin u of the band wheel N. The band or belt N' of
this band wheel extends therefrom to and upon a smaller band wheel P. The axle
u of the band wheel N is upon the outer end of a lever P¹, the inner end of
which is pivoted at u¹¹ to the frame of the machine with such tightness as to be
held by frictional contact in any position to which it may be turned. As the pivot
u is not coincident with the primary shaft it follows that the band N¹ may be
tightened or loosened, as circumstances may require, by simply adjusting the lever
P in one direction or the other, while the position of the crank arm M, being at
the end of the rock shaft L, permits the bearings of the latter to be wide apart,
thereby insuring much greater stability to the treadle, and consequently to the

page_text: parts immediately connected therewith, than is possible with the treadle loose on
the shaft and provided with connections in the ordinary manner.
This
It now remains to explain the construction and modus operandi of the novel
rotating hook whereby I avoid the hoisting of the thread hitherto usual in the
formation of the lock stitch in a rotating hook machine. R is the hook carrying
the bobbin S (shown in detail in Figures 23ª and 23b), in the usual manner.
hook differs from that in common use in being formed with a lip or shoulder v
immediately behind the nose x of the hook, and upon the outer or front side of the.
said hook is a deep notch somewhat oblique to the plane of the hook, and which
starting from a point back of the nose x merges at its rear end into a shallow notch
or sloping recess x¹ formed in the front of the periphery of the hook, and preferably
nearly or quite opposite the nose x, this recess although shallow being at its
greatest depth equal to that of the central cavity of the hook wherein is placed the
bobbin S. In the operation of this apparatus the hook rotates and the needle
descends in proper relation thereto in the same manner in other lock-stitch
machines, but instead of the usual and well known twisting of the warp of thread
involved in the operation of the ordinary types of rotating hook lock-stitch
machines the inner side of said loop passes into the notch u¹, from which by the
continued rotation of the hook it passes to the recess x¹, which permits it to pass
behind or in rear of the bobbin. Meanwhile the lip v catches the front side of the
loop and carries it around in front of the bobbin. The inner side of the loop is
thus brought behind and the front side of said loop before the bobbin, the same
being retained in this position until the loop is completely formed for the stitch,
then it is drawn by the take-up from the hook. It will be seen that by this con-
trivance a perfect loop is formed without twisting the inner side of the loop to the
front of the hook as heretofore.
The fourth part of this Invention comprises a novel combination of parts whereby
in a sewing machine is secured a pause or cessation in the motion of the needle at
the end of its downward stroke in order to insure full time for the passage of the
shuttle through the needle loop.
The said Invention also comprises a novel combination of a circular raceway, a
rotary shuttle traveling therein, and provided with steadying springs and a radial
arm on the operating shaft, whereby a steady movement of the shuttle in accord
with the movement of the needle is secured.
The said Invention further comprises a novel combination of leaf springs grooved
or bowed in a longitudinal direction with the shuttle and the aforesaid circular
raceway, whereby a smooth and frictionless operation of the springs in steadying
the shuttle during its motion is provided for.
The said Invention further comprises a novel construction of the said shuttle and
its enclosed bobbin whereby easy access to the bobbin is provided for, and
whereby proper tension to the shuttle thread and the facile delivery of said shuttle
thread are secured.
The said Invention further comprises a novel combination of a take-up lever
pivoted at its lower end to the stationary frame of the machine, and actuated
5 through a rod by the needle operating crank, whereby simple and efficient means
for taking up or tightening the thread in the completion of the stitch are secured.
This part of the said Invention is illustrated in Figures 26 to 33 of the
Drawings.
In these Figures 26 is a side view, partly in section, of a sewing machine
embracing these improvements; Figures 27, 28, 29, and 30 shew details of portions
of the said improvements; Figures 31 and 32 are front views and partial sections
of the same; and Figure 33 is a central longitudinal section of a shuttle forming
part of my said Invention.
A, A, are the two parts or sections of the primary shaft of the machine, each being
5 supported in suitable bearings, but these two parts instead of being in line are
placed eccentric with each other, that is to say, with their axes in parallel lines
but not longitudinally coincident; upon the inner end of each is a disc A¹ pro-

page_text: vided with a crank pin a; one of these crank pins a takes into one end of a link B.
placed between the discs A', while the other of said crank pins takes into the
opposite end of said link. By these means the rotary motion of the one part or
section of the shaft A may be transmitted to the other, but the driven part will
move with a speed varying at different parts of its revolution according to the
.degree of eccentricity of the two parts of the shaft. C is a guide or raceway which
may be of circular, oval, or other suitable form, and arranged at the front of the
machine and in appropriate relation to the needle b; in this raceway is placed the
travelling shuttle D. Upon the front end of the compound primary shaft A, just
herein-before described, is a radial arm B¹ which projects to and behind the
shuttle D in such manner that in the rotation of the shaft A the arm B¹ will drive
the shuttle around in the raceway C with a positive motion. The shaft A being
driven from its rear end its forward portion will have at different portions of its
revolution a varying speed which will be transmitted to the shuttle driven thereby,
this varying speed of the shuttle at different portions of its revolution adapting it
to work in perfect unison with the needle in the proper formation of the stitch.
The power is applied to the shaft A by any usual or suitable means. Upon the
rear extremity of said shaft is a crank C¹, from which extends a rod D¹, whose
upper end is pivoted to a rocking arm E arranged at any desired height above the
needle actuating shaft F herein-after described. Upon the rear end of this needle
shaft is a crank c; a link F¹ has one end pivoted on this crank c, and its other end
pivoted to the adjacent central portion of the rod D¹, as indicated at a¹¹. The
rotation of the crank C¹ gives a compound lateral and vertical movement to the
rod D¹, and the latter acting through the link F¹ gives a rotatory motion to the
crank c, and consequently to the needle shaft F, but inasmuch as the movement of
the rod D¹ (at a certain point in the revolution of the crank c) brings the link F¹
into a position nearly or quite vertical, and causes the same to turn upon the
crank c as upon a dead point (as shown approximately in Figure 27), it follows
that a temporary cessation of motion of the crank c, and consequently of the needle
shaft F is afforded. This cessation is designed to occur at that point in the revolu-
tion of the needle shaft, at which the needle is depressed t permit the passage of
the shuttle through the needle loop, and thereby greatly facilitates this portion of
the operation of forming the stitch.
The needle actuating shaft F is made in two parts or sections 6*, c*, placed
eccentric to each other in the same manner as the two parts of the primary shaft.
Upon the part 6* is provided a crank pin e, which works in a socket or bearing
provided in the end of a slide f that passes through a transverse slot in the adjacent
end of the part c*. As the part c* rotates eccentric to the axis of the crank pin e
of the part 6* the slide moves in and out through the slot in the part c, the part b*
rotating the part c* with a speed varying at different parts of the revolution of the
latter as the crank pin e approaches or recedes from the axis of the part c*. This
variation in the speed of the part c* of the needle shaft is designed to afford a
means for giving the crank G on the front end of said shaft the movement most
advantageous in the operation of the needle bar J. The crank G carries a link G¹,
whose upper end is pivoted at n¹ to the lower end of a second link I, whose upper
extremity is pivoted to the needle bar J, the latter being arranged to move vertically
in the usual guides; I¹ is a rod pivoted at its outer end f" to a fixed support, and
which has at its inner end a pin g¹ that plays in a semicircular slot m¹ in the
enlarged upper portion of the link I. The inner end of the rod I' may, if preferred,
be connected directly to the joint of the links I, G¹, as represented in Figure 30
at f*. This rod I¹ serves to keep the pivot of the links G and I in such position
as to insure the proper action of said links in giving motion to the needle bar.
The rotation of the crank G causes the link G¹ to give the vertical rectilinear move-
ment to the needle bar. The latter is lifted to its utmost when the link is in such
position that in moving upon the pivot n¹ the said link turns upon a dead point,
so that for some little distance its swing together with the further rotation of the
crank G will not appreciably move the needle bar. The crank G is also provided

page_text: with a rod n, the outer end of which is pivoted to an upright take-up lever K. The
thread passes from the usual spool L through an eye h around a reel L', thence
through a fixed eye h¹ to and through an orifice or eye i in the upper extremity of
the lever K, and then down to the needle in the ordinary manner.
In lieu of the reel L' and eyes h, h¹, any other suitable thread conducting device
may be used.
The shuttle D is shown in section in Figure 33. It is made hollow with its rear
end closed by a screw plug r, upon the inner side of which is a tubular stem 7+1
that forms the axle of the bobbin S within the shuttle. Upon the inner extremity
of the stem is a spur s, in which are eyes or holes 11 The shuttle thread is
passed from the bobbin to and fro through these eyes 11 to insure the requisite drag
upon the thread, and thence through the tubular stem r¹ out at the rear of the shuttle.
In order to prevent jarring or slamming of the shuttle while it is revolving in the
circular raceway it is provided with longitudinal springs u, which curving outward
from its sides bear against the adjacent surface of the raceway, and give stability and
steadiness to the shuttle in its motion. The shuttle is retained in the raceway by
an appropriate plate or front attached to the latter as shown at F" in Figure 26.
Q" is the feeder comprising an upright feed bar, the upper extremity of which
underneath the presser foot I" is serrated to present the usual roughened surface to
the fabric in the use and operation of the machine. This feed G₁ is connected at
its lower end to the extremity of a horizontal link J, the outer end of which is
pivoted to a fixed support g*. The inner end of the link J" by means of a suitable
pin is capable of vertical adjustinent in a slot * in the aforesaid lower extremity of
the feeder, so that it may be set higher or lower in the said slot to regulate the
throw of the feed as occasion may require.
The feed G has a circular orifice or seat formed at or near the centre, and in this
is fitted an eccentric R¹ carried upon the shaft A as represented in Figure 31. The
rotation of said shaft causes the eccentric R¹ to give a compound vertical and
horizontal swinging motion to the feeder G, that acting upon the under surface of
the fabric passing beneath the presser foot I feeds the fabric to the needle 6 in co-
operation with the movements of the stitch forming devices.
It will be understood that the two parts of the shaft F may be connected by two
cranks and a link like the shaft A, instead of by the slide f and single crank e as
herein-before described. In like manner the crank e and slide may, when
preferred, be substituted for the two cranks a and link B in connecting the two
parts or sections of the shaft A.
The fifth part of the said Invention is designed to provide a feed for sewing
machines, which will feed the fabric to the needle without the abrading action
thereon incident to the use of the feed mechanism hitherto devised, and which in
addition will give a positive movement to the fabric during the operation of
feeding.
This part of the said Invention comprises a feed constructed with annular pro-
jections or needle points that in the operation of the device pass between the fibres
of the fabric and move it along without any compressing or gripping action, thereby
securing the object sought.
Also certain novel combinations of parts adjunctive to the main feature just
indicated of my said Invention, and aiding the same in its most effective and
efficient application for any purpose.
This part of my Invention is illustrated in Figures 34 to 39, in which,―
Figure 34 is a front view, partly in section, of a sewing machine feeder con-
structed according to this part of my Invention.
Figure 35 is a vertical section of the same taken centrally and in a plane at right
angles to Figure 1.
Figure 36 is a front view, partly in section, corresponding with Figure 34, but
showing the part of the apparatus in a different position or stage of operation.
Figure 37 is a longitudinal section of one portion of the said feeder.
Figure 38 is a plan of the presser foot included in this part of the said Invention.

page_text: Figure 39 is an end view showing a modification of the said presser foot.
ав
In these Figures A is the usual tablet of a sewing machine slotted at a to permit
the working of the feeder in the proper relation to the presser foot B; C is a slide
capable of longitudinal movement in stationary guides b, b; D is the feeder pivoted
at a¹ in the rear end of a slot a* in the slide C. This feeder is provided with a
number of acicular projections or needle points c, which are preferably arranged
shewn in the Drawings. E is a lever pivoted at its lower end b¹, and having its
upper or free end connected by a rod with the slide C. Upon the usual hook or
shuttle operating shaft F of the sewing machine is a cam G, which works in a
suitable shaped orifice or bearing in a plate H, the arm h of which connects by an
adjustable socket i and screw j with the lever E. The rotation of the cam G
acting through the plate H, lever E, and rod f, gives a longitudinal movement to
and fro of the feed D. Upon the face or outer extremity of the feed D is a down-
wardly projecting arm k, the lower end of which is pivoted to a plate I, wherein
is an orifice or bearing m corresponding to the orifice or bearing in the plate H.
In the orifice or socket m is fitted a cam J, which, like the cam G, is fixed upon
the shaft F. The cam J is arranged with reference to the cam G to act in unison
with the said cain G, giving a vertical movement (through the arm k and plate I)
to the feeder D, while the cam G gives a longitudinal movement to said feeder.
By these means when the feed D is moved longitudinally in one direction it is so
lifted that its needle points c project upward beyond the upper surface of the
tablet A, and when said feed in its return movement moves longitudinally in the
opposite direction it is lowered so that the needle points are brought below the
aforesaid surface of the tablet. B is the presser foot attached to the usual stem L,
but either slotted longitudinally, as represented at n, in Figure 38, or longitudinally
grooved on its under side, as indicated in Figure 39.
In the operation of this apparatus the feed D is moved upward until its needle
points c pass through the fabric to be fed to the needle of the machine (the said
fabric being represented at r in Figures 34, 35, and 36), and being moved forward
with the first part of the longitudinal movement of the feed carry or move the
fabric the requisite distance or degree, the fabric being held down upon the tablet A
by those portions of the presser foot B between, as the case may be, the grooves in
the under side of the said presser foot or the slots n in the same; these grooves or
slots permit the needle points to pass through the fabric without being blunted,
dulled, or in anywise interfered with by the presser foot, which holds the fabric in
position upon the tablet, as just specified. When the feeder has reached the limit
of the forward or first position of its stroke the feeder is lowered, thereby with-
drawing the needle points from the fabric; then the feeder by the reverse or
receding portion of its stroke is brought back to its previous position preparatory
to a repetition of the feeding movement. The degree to which the fabric is moved
at each movement of the feed is equal to the length of stroke of the feeder D, and
this may be regulated at will by adjusting the attachment of the arm h to the
lever E at a greater or less distance from its pivot or fulcrum 6¹ by means of the
racket and screw j.
Inasmuch as the needle points c of the feeder first enter the fabric, then move
the same by their own direct movement, and are then withdrawn preparatory to
another stroke, the said fabric is fed to the needle without forceable compression
against the presser foot, and without rubbing action from the feeder itself. All
abrasion of the fabric is by this means avoided, and a positive movement secured
to the fabric. The feed thus operating according to my Invention is especially
adapted to the sewing of lawns and other extremely light goods which are liable
to be injured by any rubbing or abraiding action exerted upon them, as well as for
heavier fabrics that for any reason may offer more or less resistance to the feed
working with a pressing action hitherto in common use, all liability of the feed to
slip upon the fabric being by my Invention effectually avoided. The needle points c
of the feed may be few or many as may be desired, or as may be called for by the
character of the work for which the machine is intended.

page_text: In order to provide in case of accident for the replacement of any of the needle
points c the feeder D is constructed with a plate w having taper holes all, as shewn
in Figure 37. The needle points c being also of taper form are fitted in the holes a¹¹
from the inner side of the plate w, which is then fastened in place by set screws
61, 6. In order therefore to replace a needle point it is only necessary to detach
the plate w, insert a new needle point, and replace and reattach the plate w.
Having thus fully described the said Invention as communicated to me by my
foreign correspondent, and the manner of performing the same, I wish it understood
that I clain in the first part of my Invention,―
First. The needle shaft C constructed with the double cranks B', B³, arranged at
an angle to each other in combination with the coincident eccentrics B, B, driving
shaft A, and connecting rods C¹, as above described, and for the purposes set forth.
Second. The link and pitman F in combination with the crank d of the
needle shaft C and the needle bar E, as above specified, and for the purpose set forth.
Third. The reciprocating gripping sleeve B*, having a positive movement in both
directions from the needle shaft C, in combination with the feeding tension plate b
and the needle bar E, the whole arranged for operation as above specified and for
the purpose set forth.
Fourth. The combination of the tubular fulcrum screw C₁ with the bar B¹
actuating the upper feed motion, as above described, and for the purpose set forth.
Fifth. The bobbin holder constructed with the looper N, as above described, and
for the purpose set forth.
Sixth. The combination of the looper N with the rotary hook or shuttle, the
bobbin, and the eye pointed needle, as above specified, and for the purpose set forth.
Seventh. The combination of the slide K, the eccentric N, and the elbow lever
K2 with the looper N, as above specified, and for the purpose set forth.
Eighth. The pivoted adjustable bar m made oblique at its free or outer end in
combination with the lever k² and the looper, as above specified, and for the purpose
set forth.
Ninth. In a sewing machine & looper arranged to pass through the needle loop
in combination with the hook or shuttle arranged to pass behind the needle loop
and through the secondary loop of the looper, as above set forth.
In the second part of said Invention,―
Tenth. The combination of the supplemental hook C with the rotary hook B, as
above specified, and for the purpose set forth.
Eleventh. The rotary hook B provided with the curved guide C¹ constructed to
operate as above described and for the purpose set forth.
Twelfth. In a sewing machine the combination of the rotary hook and needle
with the guide spring D constructed to operate as above specified and for the
purpose set forth.
Thirteenth. The brush or pad K in combination with the rotary hook provided
with the supplemental hook C, as above specified, and for the purpose set forth.
Fourteenth. The brush K constructed with the stem I held by the holder G, in
combination with the rotary hook, whereby the brush is retained in the requisite
position with reference to the said rotary hook, as above described.
In the third part of said Invention,-
Fifteenth. In a sewing machine the jointed connecting rod C, comprising the
part a pivoted to the crank a, and the part 61 pivoted to the needle bar A, in
combination with the rod A", the several parts being combined and arranged for
joint operation, as above described and for the purpose set forth.
Sixteenth. The take-up levers B, C, provided with eyelets all in their several
extremities, and attached directly to the top of the needle bar A, in combination
with the fixed eyelets or guides 6¹¹¹, as above described, for the purpose set forth.
Seventeenth. The pivoted link J provided with an adjustable socket I, the
rod H, and rod K, in combination with the eccentrics m, n, and the feed G, con-
structed with a grooved arm S, whereby the length of the feed movement may be

page_text: varied, and a positive rising and falling motion may be imparted to the said feed, as
herein set forth.
Eighteenth. The eccentric m having its strap pivoted to the arm S¹ of the feed G
in combination with the eccentric n actuating the link J through the medium of
the rod H, the whole constructed and combined to provide for the requisite unison
and the longitudinal and vertical movements of the feed, as above described.
Nineteenth. The hook R constructed with the lip or shoulder v, and the notch
terminating the sloping recess x1, the whole so constructed and combined that the
inner side of the loop being carried behind and the outer side before the bobbin
the loop is formed without twisting the thread, as above set forth.
In the fourth part of this Invention,-
0
Twentieth. The rod D pivoted at its upper end to the extremity of the rocking
arm E, the link F¹ connecting the rod D¹ at or near its centre to the crank c of the
needle shaft F, and the primary shaft A connected by its crank C¹ with the lower
end of the rod D₁, all combined for operation as above specified, and for the purpose
set forth.
Twenty-first. In a rotary shuttle machine the race way C, the shuttle D con-
structed with springs u adapted to operate against the sides of the race way and
the revolving arm B₁ for giving the rotary movement to the shuttle within the
race way, and in unison with the needle b, the several parts being combined and
arranged for united action, as above specified.
Twenty-second. The grooved leaf springs u in combination with the traveling
shuttle D in the race way C, as above specified, and for the purpose set forth.
Twenty-third. The take-up lever K pivoted at its lower end to the stationary
frame of the machine, and actuated through rods n by the needle operating crank,
as above specified, and for the purpose set forth.
.
And in the fifth part of said Invention,-
Twenty-fourth. In a sewing machine a series of needle points provided to pass
simultaneously through the fabric, and to mutually assist each other in holding the
same, whereby the straight and uniform feeding of the fabric is secured, and tearing
and slipping of the fabric prevented, as above set forth.
Twenty-fifth. In a sewing machine feed the presser foot B constructed with.
parallel grooves or slots, as described, in combination with the feed D constructed
with the series of needle points c, whereby the said needle points are enabled to
pass quite through the fabric to firmly hold the same, as above set forth.
Twenty-sixth. The feed D constructed with the plate w carrying the series of
needle points c and the screws 6", the whole combined and arranged as above
specified, and for the purpose set forth.
Twenty-seventh. The feed D provided with the arm k, the plates H, I, and
lever E, in combination with the compound eccentrics G, J, the whole constructed
and arranged to produce two entire movements of the feed to one revolution of the
shaft, as above specified, and for the purpose set forth.
In witness whereof, I, the said William Robert Lake, have hereunto set my
hand and seal, this Thirtieth day of June, in the year of our Lord One
thousand eight hundred and seventy-six.
Witness, JAS. EDWARDS,
8, Southampton Buildings, London.
W¼. ROB³. LAKE. (L.S.)