US402854A - Striping attachment for circular-knitting machines - Google Patents

Description

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J. A. FARR. STRIPING ATTACHMENT FOR GIRGULAR KNITTING MAGHINES.

No. 402,854. I Patented May 7, 1889.

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STRIPING ATTACHMENT FOR CIRCULAR KNITTI G MACHINES. No. 402,854. Patented May'7, 1889.

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J. A. PARR. v STRIPING ATTACHMENT FOR CIRCULAR KNITTING MACHINES.

No. 402,854. Patented May '7, 18891 4 WITNESSES I a INVENTOR ATTORNEYS.

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J. A. PARR. STRIPING ATTAOHMENT FOR CIRCULAR KNITTING MACHINES. No. 4-02,854. Patented May 7,1889.

WITNESSES: INVENTOB: M W a Jim/v w I BY ATTORNEYS.

Nv PETERS. Pnembmc n h r. Washington. D. c.

UNITED STATES PATENT OFFICE.

JAMES A. PARR, OF AMSTERDAM, NEWV YORK.

STRIPING ATTACHMENTFOR CIRCULAR-KNITTING MACHINES.

SPECIFICATION forming part of Letters Patent No. 402,854, dated'May '7, 1889.

Application filed March 21, 1887. Serial No. 231,638. (ModeL) To all whom it may concern:

Be it known that I, JAMEs A. PARR, a citizen of the United States, residing at A1nsterdam, Montgomery county, State of New York, have invented certain new and useful Improvements in Striping Attachments for Circular-Knitting Machines, of which the following, in connection with the accompanying drawings, is a full, clear, and exact specification.

This invention relates to certain new and useful improvements in striping attachments for circular-knittin g machines, and has for its object to effect a changing of the threads that are to be taken up by the needles and the cutting of them in such a manner that stripes are produced in the knit fabric,which stripes run transversely to the length of said fabric.

The invention consists in the construction and combination of parts and details, as will be fully described and set forth hereinafter, and then pointed out in the claims.

In the accompanying drawings, Figure l is a plan view of part of a circular-knitting machine with my improved striping attachmentapplied thereto. Fig. 2 is a longitudinal sectional view of the parts shown in Fig. 1. Fig. 3 is a detail view taken onthe line y y, Fig. 1. Fig.4 is a side view of the parts shown in Fig. 1, parts being broken out; and Fig. 5 is a detail view taken from the inside of the needle-cylinder, a part of the needle-cylinder and of the needles being shown. Fig. 6 is an enlarged detail side view of the thread-cut ting device. Fig. 7 is a cross-sectional View of the same on the line 00 :0 of Fig. 6. Fig. 8 is a detail view of part of the thread-cutteroperating wheel, showing different arrangements of the pins on the rib thereof.

A represents the needle-cylinder, and B the cloth-presser, which presses the cloth down.

into the needle-cylinder and is secured on the standard B on the base B ofthe attachment in the usual manner.

O is a stitch or loop wheel which is on the outside of the needlecylinder, the teeth of which loop-wheel pass in between the nee dles, said wheel being mounted on the inclined pivot O on the end of an arm, C 011 the standard 0 which is also secured on the base B of the attachment.

D is a presser-wheel on the outside of the cylinder, which is mounted on a pivot on the end of an arm, D,which is secured on a standard on the bed or base of the machine on which the needle-cylinder revolves.

The needle-cylinder A is mounted on the shaft A and is revolved by means of a cogwheel or any other suitable driving mechanism. (Not shown.) All these parts,which are of the usual well-known construction, are only shown to illustrate my invention.

From the base ]3 of the attachment the arms E project, on which the shaft E is fixed, and on said shaft the ratchet wheel F is mounted to revolve, which ratchet-wheel is shown in dotted lines in Fig. 2, and is united with the pattern-wheel F, also mounted to revolve on the shaft E, and provided with a circumferential groove, F and transverse grooves'in its rim for receiving the patternchain G and the laterally-projecting lugs G of the same, the links passing into the circumferential groove and the lugs G passing into the transverse grooves, so that when said pattern-wheel is revolved the pattern-chain G will be carried around by it. The patternchain is endless, and its length is greater than the circumference of. the sprocket-wheel, so that the chain hangs down below the sprocket-wheel, as shown in Fig. 2.

From the base 13 of the attachment an arm, 1, projects, on the top of the outer curved end of which a spring, I, is secured, and on the free end of said spring a lug, I is formed, which passes into the circumferential groove F of the pattern-wheel F, at the bottom of the same, as shown in Fig. 2, and prevents said wheels F F from accidentally turning in either direction on the shaft E.

From the outer side of the pattern-chain a series of lugs, I-l, project, which lugs are placed at any desired points, according to the width of the stripes required-that is, for each stripe or pattern of a different kind a chain having its lugs placed different distances from each other must be provided. Where the stripes are to be close together the lugs must be close together, and where the stripes are to be farther apart the lugs must be a greaterdistance from each other.

A pawl or dog, J, is pivoted on one end of an arm, J, projecting from the lower part of the elbow-lever J mounted to rock on a shaft, J in the frame of the machine, parallel with the shaft E and in front of and below the same. On the front lower end of the elbowlever J 2 the roller J is mounted to turn and runs on a ea1n-track,A 011 the needle-cylinder A. The dog J is provided with a weighted lower end, J which causes the upper end or point of the pawl J (shown in dotted lines in Fig. 2) to engage the teeth of the ratchet-wheel F. Every time the needle-cylinder revolves and the cam A depresses that end of the elbow-lever J 2 carrying the roller J 4 the pawl is swung up and revolves the ratchet-wheel F and the pattern-wheel F, connected with the same, a distance equal to the length of one of the ratchet-teeth. The upper end of the said elbowlever J 2 is connected with devices which will be described hereinafter. The wheels 1? and F are not mounted directly on the shaft E, but on the sleeve K, surrounding the same loosely, which sleeve extends around the entire length of the shaft E to the bearings, and on one end of said sleeve a threadcutter-operating-wheel, K, is mounted, which is provided on its rim with the annular rib K placed edgewise on said rim and provided with a series of apertures, K for receiving pins L, projecting from both sides of said rib, which pins can act 011 the beveled lugs M, held on the lower ends of screws M, passed through two levers, N and N, pivoted. side by side at the point M on the frame of the machine, said levers extending over the upper part of the thread-cutter-operating wheel K and over the pins on the same.

By thus forming the wheel K with a circumferential rib having'apertures extending through it parallel with its axis, as shown in Fig. 8, the pins may be readily arranged without removing them by simply pushing them so as to project at either side of the rib or through the rib at both sides, in which latter instance the two levers N N will ,be simultaneously acted upon. The rear ends of the levers N N are pulled downward by spiral or other springs M", secured to the ends of the said levers and to the part B of the frame of the attachment. In place of said springs weights can be used.

To the front ends of the levers N and N the rods N and N are connected at their upper ends by ball-and-socket joints, and the lower ends of said rods N and N are pivoted to the levers O and 0, respectively, which levers are both pivoted to the blade P on the standard P on the base of the machine,which blade P is provided with the stop-pin P which prevents the cutting lever or blade 0 from swinging down too far. The front ends of said levers are adjacent to the wheel O that is, beyond the wheel 0 in the direction in which the cylinder revolves, as is shown in Fig. 1.

To the inner side of the lever or blade 0 the spring-strip O is secured, the front end the top edge of the fixed blade P, and on the under side of said lever O a spring, 0, is secured, the front end of which is below the tongue or prong O and can be held between the said tongue or prong and the upper end of the fixed blade P.

A tongue or wire, Q, as shown in Fig. 1, curved downward at its front end, projects from a plate, Q in front of the swinging end of the blade 0 and serves to guide the cut ends of the threads and prevent them from passing under the beards of the needles. The plate Q itself serves to press down the barbs of the needles and prevents the cut ends of the threads from getting under the barbs or beards of the needles and being knit into and showing through the right or face side of the fabric.

From the front end of the fixed blade P the guard Q projects laterally, and at the inner end of said guard the guard-wire projects upward from said fixed blade P. The guard Q guides the successive stripingthreads into the cutting mechanism, and the vertical guard-wire prevents the threads from being carried too far between the cutters.

On that end of the sleeve K opposite the one on which the thread-cutter-operating wheel K is mounted the thread.-guide-operating wheel R is mounted,which is revolved by said sleeve, and on the rim of said wheel B one or two circumferential ribs, R, are formed, which are provided with apertures for receiving pins S, which act on beveled lugs S on the lower ends of the screws 8, passed through levers S, 5*, and S, pivoted on the frame above said wheel R, the screws and the lugs onthe lower ends of the same being similar to the screws M and lugs M previously described. Springs M", also connected with the part B of the frame, pull down the rear ends of the lovers S, S", and S thereby pressing the beveled cam-pieces S 011 the lower ends of the screws in said levers upon the pins S.

By forming the guide-operating wheel R with parallel circumferential ribs having aligned apertures parallel with its axis the pins may be readily pushed into proper posision for operating the three levers S S 8'', either one at a time, in any desired order, or two levers simultaneously in certain classes of work. The screws pass through the levers S S S, and are provided with nuts S at opposite sides of said levers, by means of which the screws can be raised and lowered, and the cam-pieces or beveled lugs on the lower ends of the same can be adjusted to be a greater or less distance from the bottom edges of said levers.

The pins S, projecting from opposite sides of the ribs R, must be so arranged with relation to the lugs S that at all times two of the said lugs S will rest on the rim of the wheel. Thus, when two of the lugs S of the screws S in the levers S, S and S rest on the rim of said wheel, the remaining lug, S must rest on a pin. The front ends of the levers S, S and S are connected by rods T (see Fig. 2) with the three thread-guides U, U and U which are pivoted in the standard U on the base B of the attachment, the rods T being provided with ball-and-socket joints at both ends. The threads a a a are passed through eyes 6 on an arm c, on the standard d, and then are passed through apertures in the thread-guides U U U near the pivots of the thread-guides, are passed along the under sides of the thread-guides, and are then passed through apertures in the swinging front ends of the said thread-guides.

On the upper end of the upwardly-projecting arm of the elbow-lever J 2 the dog V is pivoted, which is adapted to engage with the ratchet-wheel WV, formed on the inner end of the thread-guide-operating wheel R 'on the sleeve K, the said elbow-lever J being provided with a slot, J in the upper end of its upwardly-projecting arm, in which slot the pivot J T of the dog is set in the desired position and held by an adjusting-screw, J thus permitting of adjusting the dog to have a greater or less throw. The screw J 9 extends into the rear or inner end of the slot J S and bears against the pin J so that by turning the screw the pivot may be moved farther forward or allowed to move inward or rearward, as the case may be. A jam-nut, J prevents accidental movement of the screw J The dog or pawl V rests near its pivoted end on the pin X, projecting laterally from the lever V, pivoted on the frame of the attachment and connected at the end provided with the pin X with the spring V which pulls said end upward, thereby pressing the other end in the direction toward the chain G.

In that end of the lever V opposite the one connected with the spring V the screw W is held, and on thelower end of said screw WV the beveled lug or head is secured. Nuts )V are screwed on the screw W, by means of which nuts the screw can be locked in different positions on the end of the lever V, and thus the screw can be so adjusted that its beveled head or lug 7 is a greater or less distance below the end of the lever,'as circumstances may require.

The lugs G of the pattern-chain G at suitable intervals are provided with extensions g, which can act on the tooth h on the upper end of an arm, h, mounted rigidly on the rocking sh aft 72/ from which the arm w (shown in dotted lines in Fig. 4) projects, the free end of which carries a pawl, c, which is pressed by a spring, 2", against the toothed edge of an auxiliary pattern-wheel, j, pivoted at j and provided with apertures for receiving pins 1, which project from the inner side of said wheel, and on said pins a hook-pawl, m, rests,

which is provided with abeveled end part, m, said pawlbeing formed on the end of ashaft, 0, provided at its inner end with acrank, p, from which the pin r projects and extends under the dog V, pivoted on the upper end of the angle-lever J The shaft 0 is pivoted in an eye, .9, on an arm, 25, projecting from the cross-piece of the frame of the attachment.

I have shown three levers, S S S and in this case yarns or threads of three different colors, and thus stripes of two or three different colors, can be produced in the fabric, any one of which may be called the body, but, if desired, only two levers-for instance, S S may be used, or a greater number may be provided, according to the number of different colors to be provided. It is the same with the cutting-levers. I have shown but two levers, N and N; but if a greater number of threads is used a greater number of levers must be provided for the cutting device.

The operation is as follows: The threads a, a and a are passed through the loops oreyes b on the arm 0' and through the thread-guides U, U and U (See Figs. 1, 2, and 4.) The thread that is being knit-a in the drawingsis acted upon by the stitch or loop wheel in the usual manner, and is taken up by the needles as the needlecylinder revolves in the direction of its arrow, as is shown in Fig. 1. The guide U through which thread a passes, is held in position to deliver the thread a to the stitch or loop wheel by one of the pins on wheel R acting upon the block on the screw S carried by the lever S While guide U is thus held elevated the guides U U remain depressed, as shown in Figs. 1 and 2. Wheel R remains stationary until a change of thread is to be made, pawl V being held out of engagement with ratchet WV by pin X on lever V. As the lever J 2 is rocked by the cam-track on the needle-cylinder and revolves the ratchetwheel F and the'pattern-wheel F, the pattern chain G is carried around in the direction indicated by the arrow as in Fig. 2. \Vhenever one of the beveled lugs H on the chain strikes the beveled head WV on thelower end. of the screw which will be when the end J 4 of the elbow-lever J is at the limit of its downward movement, the lever V is moved upward at its outer end, the spring V brought in tension, and the inner end of the lever and its pin X are moved downward, thus permitting the pawl V to descend and engage with the teeth of the ratchet-wheel )V, and thererotated, the pin thereon which supports the block of the thread-guide-operating lever S will pass from under the same, throwing the thread-guide out of operation, and another pin will engage the block on another lever and throw the thread-guide thereof into operative position, and so 011 successively in regular or irregular order, as may be desired. The cutter-operatin g wheel K rotates with the threadguide-operating wheel, and the pins on said wheel K are so arranged with relation to the pins on the thread-guide-op eratin g wheel that when a threadguide is lowered out of its operative position, and by the movement of said guide a thread is carried between the cutters O P, the lever N will be operated by a pin 011 wheel K, which will cause the blade 0 to descend and sever the thread. \Vhen the thread is thus severed, the end thereof lead ing from the thread-guide will be held by the spring 0 for instance, pressing it against the prong 0 the thread formerly held by said parts being thrown by movement of its threadguide against the loop or stitch wheel and presented thereby to the needles. The prong and the spring 0' at this time are now hold ing the second inoperative thread against the fixed cutter. At certain intervals on the cutter-operatin g wheel K the same pin proj ects at opposite sides of the rib, or two pins are placed in alignment, as shown in Fig. 8, so that the upper cutter and the prong 0 will be simultaneously raised to release the thread held between the spring 0' and the fixed cutter, the then active thread being passed by movement of its thread-guide between the spring 0' and the fixed cutter, the movable cutter and the prong being at this moment moved toward the fixed cutter, whereby said active thread will be severed and held. Two threads are always held by said mechanism, and are released one at a time, the active thread being simultaneously severed and held. The prong O merely serves as a movable clamping member.

The action of the auxiliary pattern-wheel and its connected mechanism will now be described.

Vhenever one of the laterally-projecting lugs g on the chain G strikes the prong h on the end of the e1bow-arm h, the upper end of the said arm is swung from the chain, whereby the pawl 11 is swung upward and revolves the auxiliary pattern-wheel j in the direction of the arrow y, Fig. 4, carrying the pins Z, projecting at desired intervals from the inn er side of the said wheel j to act on the beveled end on of the pawl m, which, when thus acted upon by a pin, Z, is swung up, as is also the pin 9' on the crank 19 at the inner end of the shaft 0, on which the pawl m is formed, and when said pin 9' is swung up it passes under the pawl V and keeps the same raised, so that, even when the beveled head on the screw XV in the lever V is acted upon by one of the lugs ll of the chain G and is raised to swing down the pin X which holds the pawl V raised, the said pawl cannot descend to act on the ratchet-wheel \V, as previously stated, as it is held raised by the pin 0' on the inner end of the crank 19. The action of the lugs H of the chain on the mechanism is thus counteracted by the pin r audits operating devices. If said pin r and the devices for operating it were not provided, the action of the lugs H of the chain on the head V would cause a change of thread or yarn; but by providing the pin 0- and the devices for operating it such change of thread. is not effected. The lugs g on the chain G and the pins Z on the wheel j may be arranged in different positions, so as to counteract the action of the lugs II on the chain G on the threadchanging mechanism whenever desired. For instance, the said lugs g and pins lniay be adjusted at such intervals as to suspend the action of the strip ing mechanism and allow the machine to go on knitting as if the lug II had not acted on the lever V.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination, with a needle-cylinder and with a loop or stitch wheel, of threadguides movable 011 a support, a cutting device composed of a fixed jaw, a pivoted jaw, and a lever pivoted on the fixed jaw and having a tongue'or prong, the pivoted jaw having a spring-strip, O and the tongue or prong having a spring, 0, the levers N N, connected to the pivoted jaw, and the lever having the prong, said levers having the screws M, provided with beveled lugs M, a thread-mitten operating wheel having a circumferential rib with apertures to receive pins on which the beveled lugs M rest, a thread-guide-operating wheel having a ratchet and mounted on the same shaft with the cutter-operating wheel, spring-actuated levers connected at one end to the thread-guides and having screws provided with beveled lugs resting on pins carried by circumferential flanges on the threadguide-operating wheel, and a pawl-carrying lever operated by a cam-track on the cylinder, its pawl engaging the ratchet of the threadguide-operating wheel, substantially as described.

2. The combination, with a needle-cylinder and a loop or stitch wheel, of a cam-track on the needle-cylinder, an elbow-lever operated by the cam-track, a pawl on said elbow-lever, a ratchet-wheel operated by the pawl, a pattern-wheel connected with the ratchet-wheel, a chain passed over the pattern-wheel and having lugs, a pivoted lever acted upon by said lugs, a dog resting on said lever and connected with the elbow-lever, a ratchet-wheel operated by the dog, a thread-guide opcrating wheel, and a cutter-operating wheel connected with the said ratchet-wheel at opposite sides thereof and carrying pins, levers provided with beveled pieces acted upon by the pins, springs acting upon the levers, and pivoted thread-guides and thread-cutting devices connected with the said levers, substantially as herein shown and described.

The combination, with a needle-cylinder, a loop or stitch wheel, and a cam-track 011 the needle cylinder, of an elbow-lever operated by the cam and provided with a pawl, the ratchet-wheel F, revolved by said pawl, the pattern-wheelF, connected with said ratchetwheel, the chain G, passed over the patternwheel and provided with the lugs H and the laterally-projecting lugs g, the pivoted lever V, having a beveled head on which the lugs H can act, the pin X at the other end of the said lever, the dog V, pivoted on the upper end of said elbow-lever and resting on the pin X, the ratchet-wheel WV, with which the dog V engages, the wheels R and K at opposite sides of the ratchet-wheel NV and connected to revolve with the same, pins in ribs on said wheels R and K. pivoted levers, beveled heads connected with said levers and pressed on the pins on saidwheels R and K, thread-guides an d threadcutting devices connected with the said levers, the rocking shaft 71 provided with arm 71, having a head, 72,, on which the lugs Q can act, the pawl i on the arm 10 of the shaft 72 the auxiliary pattern-wheelj, on which the pawl 1' acts, the pins Z in said ratchet-wheel, the pawl m, the rocking shaft 0, on the end of which said pawl is mounted, and the pin 0" on the crank at the opposite end of said shaft, which pin 4" is below the dog V and can keep the same raised, substantially as herein shown and described.

4. The combination, with a needle-cylinder, of a lever operated by a cam on said cylinder, a series of thread-guides movable on a suitable support, a thread-guide-operating wheel having a ratchet, a pawl carried by the camactuatedlever and engaging said ratchet, levers connected at one end to the thread-guides and having screws provided with beveled lugs resting on pins inserted in circumferential flanges on the thread-guide-operating wheel, a cutter-operating wheel connected to the thread-guide-operating wheel, levers having screws provided with beveled lugs resting on pins mounted. in a flange on the cutter-operating wheel, cutting devices consisting of a fixed blade, P, a blade, 0, pivoted thereon, and a lever having an intermediate prong, O pivoted on the fixed blade, said lever and blade 0 connected to the levers supported by the pins of the thread-guide-operating wheel, and a loop or stitch wheel upon one side of which the cutting devices are arranged, substantially as described.

5.- A thread-cutter for knitting-machines, consisting of the fixed blade P, the blade 0, pivoted on the same, and the lever O, pivoted on the blade P and having its front end terminating in a prong which is located above the edge of the fixed blade and at the side of the pivoted blade 0, all combined substantially as herein shown and described.

6. A thread-cutter for knitting-machines, consisting of the fixed blade P, the blade 0, pivoted to the same and having the spring 0 secured to its side, the lever O, pivoted to the blade P and having its front end terminating in the prong 0 and the spring 0 secured to the bottom edge of said prong, all combined substantially as herein shown and described.

7. The combination, with a needle-cylinder, a loop or stitch wheel, and a cam-track on the needle-cylinder, of an elbow-lever operated by said cam-track, a series of pivoted threadguides at one side of the loop or stitch Wheel, a thread-guide-operating wheel, mechanism, substantially as described, operating said wheel from said lever, levers connected with said thread-guide and actuated by said wheel, a fixed blade at the other side of the loop or stitch wheel, a cutting-blade pivoted on the fixed blade, an additional lever also pivoted on the fixed blade, levers connected with the pivoted blade and the additional lever, and a cutter-operating wheel connected with the thread-guide-operating wheel, substantially as described.

8. The combination, with a needle-cylinder, a loop or stitch wheel, and a cam-track on the needle-cylinder, of the elbow-lever J operated by said cam-track, the pawl J on said rocking lever, the ratchet-wheel F, the grooved pattern-wheel F, connected with the same,

the arm I, projecting from the frame of the machine, the spring I on the same, the lug I on the spring passing into a groove, F in the pattern-wheel F, the chain G, passed over the sprocket-wheel and provided with lugs, the lever V, carrying the screw W, having beveled head WV the dogV on the upper end of the rocking lever J the ratchet-Wheel W, the wheels R and K, connected with the same and carrying pins, the levers N N and S S S operated by the pins on said wheels, and of thread-cutting devices and thread-guides connected with the said levers N N S S S substantially as herein shown and described.

9. The combination, in a striping attachment for knittingmachines, of a patternwheel, F, having a circumferential groove, F a pattern-chain, G, provided with lugs H and laterally-projecting lugs g, an auxiliary pattern-wheel, j, having pins Z and provided with a ratchet, a lever having a prong, h, lying in the path of the laterally-projecting lugs g, the shaft of said lever having an arm carrying a pawl, 1', taking into the ratchet on the auxiliary pattern-wheel, a rock-shaft, 0, having an arm, m, provided with a hook and beveled head, an, engaging the pins 1 on wheel j, an elbow-lever actuated by a cam-track on the needle-cylinder, a pawl, V, carried by said lever, a ratchet on the thread-guide-operatin g wheel with which said pawl engages, a pivoted dog having a pin in its spring supported end, which underlies and supports the pawl V, a screw in the other end of said dog, said screw having a beveled head lying in the path of the lugs H on the pattern-chain, a crank, 19, on the rock-shaft 0, said crank having a pin, 1, lying under the pawl V, and a pawl, J, having a weighted tail and actuated by an arm mounted on the rock-shaft which carries the elbow-lever, said pawl J taking into a ratchet, F, on the pattern-wheel F, substantially as described.

10. The combination, with the rotary pattern-wheel, its chain, a lever operated thereby, means for operating the pattern-wheel, the connected thread guide and cutter operating wheels having a common ratchet and a dog for rotating the same, and mechanism for operating said dog, of an auxiliary pattern-wheel, a pawl-and-ratchet mechanism therefor acted upon by said main patternchain, and a rock-shaft acted upon by said auxiliary pattern-wheel and having a 0011- nected part extending under the operatingdog of the thread-guide and thread-cutteropcrating wheels, substantially as set forth.

11. The combination, with the rotary neetile-cylinder, the thread-cutter, the threadguides, the loop or stitch wheel, and the presser-wheel D, of the plate Q between the said wheel I) and the thread-cutter, substantially as set forth.

12. The combination, with the rotary needle-cylinder, the thread-guides, the threadcutter, the loop or stitch wheel, and the presser-wheel D, of the plate Q between the cutter and the wheel D and provided with a tongue, Q curved downward at its front end to a point in front of the said thread-cutter, substantially as set forth.

13. The combination, with the patternwheel having a circumferential groove, the chain on said Wheel, an operating ratchetwheel, and means for operating the ratchetwheel, of the arm I, curved under the patternwheel between its lower side and the chain, and provided with a spring, I, having a lug, I entering the groove and the pattern-wheel and in frictional contact with the periphery of the wheel, substantially as set forth.

JAMES A. FARR. lVitnesses:

ALFRED R. FARR, ROBERT J. SANsoN.

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