US923062A - Feed mechanism for sewing-machines. - Google Patents

Description

F. w. MERRIGK. FEED MEGHANISM FOR SEWING MAGHINES.

APPLICATION FILED 00T. 30 1905. 923,062.

Patented May 25. 1909.

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F. W. MERRIGK. FEED MEGEANISM FOR SEWING MACHINES.

` PPL ATION FILED 00T 30 1905 l Patented 25,

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` l, FRANK W. MERRICK, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO UNION LOCK STITCH COM- yPANY,'OF BOSTON, MASSACHUSETTS, A CORPORATION OFy MAINE.

. FEED MECHANISM yFOR SEWING-MACHINES.

Negezaoea.

To all whom it may concern:

Be it known that I, FRANK WV. Mannion, a citizen of the United States, residing at Boston, in the countyof Suffolk, State of Massachusetts, have invented a certain new and useful Improvement in Feed Mechanismsfor Sewingv Machines, 85e., of which the following'is a specification, reference being had therein to the accompanying drawings.

The invention has relation to feed-mechanisms on the order of those which are employed in hook-needle wax-thread sewing machines, and consists, generally, in a feedmechanism of such order of novel and improved construction,r which, while more especially designed for use in a sewing machine, is equally applicable to other machines in which the material or stock operated upon is both pierced and fed.

In ya fee mechanism embodying the invention the feed-post has combined therewith an arm mounted to vibrate around a f lcam for the said arm.

fixed center, a link having one end thereof ,rf r` -in pivotal connection with the said arm, the f other end of such link having operative connection with the feed-post, and an actuating The arm and link are combined and arranged in proper relative yposition to kact in the manner of a toggle or toggle-joint, and the actuating cam acts l tov effect the operation of the feed-post by y the knuckle or joint of the toggle is moved by thev action of the cam in the direction toward the said line, a movement in one direction along the line of feed is transmitted to tlieffeed-post; as the knuckle or joint is moved in the' reverse direction, that is,

away from the said line, a movement of the feed-postgin the Lopposite direction is oce casioned. i h

An vembodiment of thek invention in a 1 needle-feed mechanism for sewing machines is illustrated in lthe drawings, in which latter,-.

Figure `1shows in front elevation partl of a sewing machine containing the said embodiment. ,2 is an end elevation looking'froin y.the left-hand side of Fig. 1.

Fig. Skis a view resembling Fig.2, lbut with.

Specicaton'of Letters Patent.

`Application filed October 30, 1905.

Patented May 25, 1909.

serial No'. 284,941.

portions broken away or in section in order to show parts which otherwise would be hidden. Fig. 4 is a detail view on an enlarged scale, partly in section, showing the connection between link 25 and arm 200 of the rocker 20.

Having reference to the drawings-at 1 is the base of the fixed frame of a sewing machine, at 2 the work-post rising from the lefthand end of the said base in Fig. 1, and at 3 is a work-support that is carried bythe top of the said work-post, a portion of the upright part of the frame at the right-hand end of the same being shown at 4, and a portion of the head of the machine being shown at 5.

At 6 is the presser above the work-support, and at 7 the presser-bar to which the presser is secured, the said presser-bar being mounted in head 5, as usual.

At 8 is a hook-needle working from below, at 9 the needle-bar, carrying the said needle and located below the work-support, and at 10 the feed-post. The said feed-post is provided with guides to which the needle-bar is fitted and within which it is reciprocated lengthwise by operating connections comprising a link 11 having the up er end thereof pivotally joined to the nee le-bar and its lower end connected to a crank-pin 12 which is carried by a disk 13 fast upon a rotating horizontal shaft 14. The said shaft is mounted in bearings at 15, 15, Fig. 1, which are supported in the base 1 of the frame of the machine.

At 16, Fig. 1, is ya mitengear fast upon the shaft 14, and at 17 is a like gear meshing with gear 16 and fast upon an upright shaft 18 which is mounted in bearings in the upright portion 4 of the frame, one of said bearings being shown at .19. The upright shaft 18 is in practice driven through suitable motion-transmitting connections (not shown) at its upper end from the driving-shaft of the machine (also not shown) and transmits rotary motion to horizontal shaft 14 through the miter- gears 16, 17.

As thus far described, the parts are not of the gist of the invention.

The feedpost 10 is supported by a pair of parallel rockers 20, 21, on the order of those of' United States Letters Patent for feed mechanism for sewing machines granted to me under date of April 11, 1905, No. 786,909, operating on the principle of parallel links to keep the needle-bar parallel with the path of its endwise movements at all times during the feedemovements. The respective rockers are located at opposite sides of the shaft 14, the rocker 20 being at the front of the said shaft in Fig. 1, and the rocker 21 being at the rear thereof.

At 22, 22, etc., are center-screws, carried by the o posite ends of the base 1 of the fixed frame o the machine, engaging with the opposite ends of the respective rockers 20, 21, and which serve to support the latter.

At 200, 210, respectively, are the upwardlyextending arms of the respective rockers, to which arms the feedepost 10is connected pivotally by the studs 201, 211, which project from one side of the feed-post at the front and rear, respectively, of the work-post 2. In the present instance, each of the said arms is of considerable width and is furnished at its upper end with a sleeve-like portion of considerable length which receives within the same the corresponding stud, as shown best in Fig. 1.

At 202, 203, Fig. 1, are bearing-cones with which each stud projecting from the feedpost is provided, such bearing-cones facing each other, and being located at or adjacent the opposite ends of the stud. They work in corresponding taperingv portions of the bore of the sleeve which is occupied by such stud. The cone 202 next adjacent the feed-post is integral with the body of the stud. That, 203, at the free end of the stud is formed in a separate piece, and is internally screwthreaded to fit the correspondingly threaded exterior of the stud. It is screwed upon the latter into proper bearing-contact with the adjacent tapering bearing-surface of the sleeve, it being adjustable upon the screwthreaded portion of the stud to enable play and wear to be taken up, and is provided with a lock-nut, 204, to prevent accidental loss of adjustment.

The devices operating to cause the feedmovements of the feed-post comprise a feedcam which is fast upon the shaft 14, a vibrator which is pivotally mounted in connection with the fixed machine-frame, and a link connecting the said vibrator with one of the rockers. Movement imparted to the vibrator by the cam in rotating is transmitted through the link to the rockers and feed-post. The parts just referred to are shown best in Fig. 3. In the drawings the feed-cam 23 is Ya so-called triangular-cam or eccentric.

The vibrator consists of a rock-shaft 241 and an arm 24. The said rock-shaft is mounted at its ends upon center-screws 2421, one of which is shown in Fig. 2, that are applied to opposite ends of the fixed frame 1. The said arm is connected with the rock-shaft. The pivotal axis of the vibrator is located at one side of the shaft 14, namely at the rear or left-hand side thereof in Figs. 2 and 3. The arm 24 extends from the said pivotal axis toward the opposite side of the said shaft, namely toward the front or right-hand side in Figs. 2 and 3, and the link 25 extends from the said arm in the same general direction and connects with the rocker 20 at the front of the shaft 14. The arm 24 is forked and the two members of the fork receive between them the cam 23, the edge of which latter makes c'ontact with the inner surfaces of the said members.

To provide for adjustment of the members toward and from each other the arm is split lengthwise from the inner end of the opening of the fork toward the hub-portion of the arm, as shown in Fig. 3, a screw 242 being passed through the opposite portions of the arm, the said screw being provided at the head end thereof with a radially projecting flange or rim making contact with one surface of the arm 24, and having a nut 243 applied to the screw-threaded stem thereof, the said nut making contact with the opposite surface of the said arm. By means of the said screw and nut, the two members of the arm 24 may be drawn toward each other to secure a proper fit of the said members against opposite portions of the cam. This means of adjustment enables all play and wear between the cam and the surfaces between which it fits to be taken up.

The link 25 is connected to the upper member of the arm 24 by means of a pin 244 which is carried by the said member, and eyes 245 with which the corresponding end of the link is provided. The ends of the pin project at opposite sides of the portion of the arm to which the pin is applied. The eyes of the link are separated from each other a distance corresponding with the width of the said iortion, which latter fits between them, an ithe opposite ends of the pin enter the said eyes. For the reception of the pin, the said portion of the upper member is formed with a split socket 245, within which the pin is placed with its ends projecting as just mentioned, the said socket having a screw 246 byvmeans of which the socket may be contracted upon the portion of the pin within the same so as to clamp the pin securely in place. For the connection of the opposite end of the link 25 with the rocker 20, the arm 200 of the said rocker is formed with an opening therethrough as indicated best in Fig. 1. This opening receives the said outer end of the link, which is enlarged and formed as a sleeve. A separate sleeve, 26, Fig. 4 occupies the bore of the said outer end of the link.

A bolt 251 is passed through sleeve 26 and also through slots 205 Figs. 2 and 3 which are formed inthe opposite parallel side-portions of the arm 200, one end of the said. bolt having a head formed by a projecting flange or rim which makes contact with the exterior of the arm 200 at one side thereof, and

said-sidefportions to be clamped securely makes ycontact with the opposite side of the arm 200; By tightening up the said nut the bolt 251 is secured in its position of adjustment within the slots 205.

W'asliers 253, 253, are placed at the opposite ends of the sleeve 26, between the said fio yof the o arm 200,

ends and the inner sides of the side-portions The sleevek 26 is longer ythan ythe sleevedike portion of the outer end yof the link 25, so that the latter may turn freely upon sleeve 26 after the nut 252 and bolt 251 have been tightened up to secure the said bolt in itsfposition of adjustment. The employment f of the Lspacing sleeve 26 ,f between the parallel side-portions of arm `200,. in conjunction with the bolt 251 with its head and nut acting against the exterior sides of the said s1deport1ons, enables the vand' to be held firmly against springing and twistingor torque, there by insuring freedom from tendency to cramp or bind in connection with the stud 201, by which the feedpost is connectedwiththe upper end of arm The slots 205 in the opposite side-portions of the g arm 200 of the rocker 20 permit the point of pivotal connection between the link 25 vand therocker to be shifted toward or rfrom the axis of motion of the said rocker by adjustment of the bolt 251 within the f ik y said slots, to thereby vary the length of the feed-movement. v

Theret'urn-stroke of the feeding devices yterminates at the same point in the machine under all adjustments of the length of the yfeed-movement, in consequence of the slots 205 being formed on a curve which is concentricwith the positionv occupied by the pin 244 at the end of the full returnestroke y f of the arm 24 that is produced by the action of cam At the end of the return-stroke of the feeding devices the needle should ocfcupy a position in line vertically with the awl, and the needle in rising should move along suchiline. For the purpose of effect mg adjustment 1n order to secure this relation of the needle to the awl, l provide for delicate adjustment of the arm 24 with rcspect to thel pivotal axis of its rocker 241.

, Thus, the hub 247 of the said arm is formed f as a ysplit socketwhich is provided lwith a contracting screw 24S. This hub-portion or socket is fitted upon a circular portion 249 saidrocker which receives the correspondof the rocker 241, which isy disposed eccentrically with reference to the pivotal axis of the rocker, as will appear kfrom Fig. 3, in which the tapering socketat one end of the within the said hub-portion or socket, the arm may be adjusted to secure the proper position of the needle at the full end of the return stroke of the feeding devices, the arm and rocker being then clamped firmly together again by means of the contracting screw 248.

The diameters of the cam 23 are all equal, and the portions of the arm 24 between which the said cam works engage with the said cam at points on the periphery thereof which are l diametrcially opposite each other. For these reasons, the said arm is controlled by the said cam at all times during the rotation ofthe cam, and held from movement in either direction save as movement is occasioned by the cam itself. The point of connection between the link 25 and the arm 24 is close to the place Where the said arm is engaged with the cam. It results therefrom that the power by which the arm is moved is applied practically at the said point of connection, and, conversely, that the strains which are incident to reversing the direction of movement of the rockers and feed-post at the end of each stroke in either direction are applied to the arm at a point close to the place of engagement with the cam. Hence, springing of the arm in operation is obviated. The strains which are incident to operation act diametrically of the cam and its shaft, and hence are solidly resisted by the bearings of the latter, and the machine-frame. rl`he link 25 constitutes a direct connection between arm 24 of the vibrator and arm 200 of the rocker 20, and the strains which are incident to opera tion act in the direction of the length of such link, and hence there is no tendency to spring the latter. The point of connection (at pin 244) of the link 25 with the arm 24 is located between the axis of movement of the vibrator, of which Vthe arm 24 forms a part, and the point of connection (at bolt 251) of the link 25 with the arm 200 of the rocker 20, so that when the vibrator is oscillated by the cam 23 a powerful toggle-like action results as the intermediately-located point of connection (at pin 244) is carried toward and away from the straight line which passes through the said axis and the said point of connection with arm 200. For the sake of brevity l have hereinafter in certain ofthe claims referred to this line as the line joining centers, the centers intended being the axis and the point of connection to which reference has just been made. In general, the strains which are inci dent to starting and moving the rockers and feedpost in either direction, and arresting the same at the end of a movement in either direction, act mainly in the direction of the lengths of the link 25 and arm 24, respectively.

While I have been careful to describe fully the construction, arrangement of parts, etc., in the case of the illustrated embodiment of the invention, it is to be understood that these may be varied and the principles of the invention be differently embodied without necessarily involving a departure from the spirit of the invention. A needle-feed mechanism is shown and described herein, but the invention is equalljT applicable to awl-feed mechanisms, and to mechanisms employing other feeding implements.

I claim as my invention 1. The combination with a feed-post, a carrier movable thereon toward and from the work, and a work-penetrating feeding implement carried by the said carrier, of a vibrating arm and link constituting a toggle, means to actuate the said toggle, a swinging arm intermediate the toggle and the feedpost or head and operated by the toggle to transmit feed-strokes to the feed-post or head, and means to adjust the engagement of the toggle with the swinging arm to vary the length of the feed-strokes.

2. The combination with a feed-post, and a feeding implement supported thereby of a link and vibrating arm constituting an operating toggle for the said feed-post, and an actuating-cam for the said toggle, one end of said link having operative connection with the feed-post and being adjustable along a curve which is concentric with the pivot of the knuckle in the initial position of the parts, the adjustment operating to vary the length of feed.

3. The combination with a feed-post, a feeding implement supported thereby and a swinging arm connected with the said feedpost, of a link and vibrating arm constituting an operating toggle for the said feed-post, an actuating-cam for the said toggle, and a connection between the said link and the said swinging arm adjustable relative to the said arm along a curve which is concentric with the pivot of the knuckle in the initial position of the parts.

4. The combination with a feed-post, a feeding implement supported thereby and a swinging-arm connected with the said feedpost, of a link and vibrating arm constituting an operating toggle for the said feed-post, actuating means for the said toggle, means to adjustably connect the said link to the said swinging-arm to enable the feed-stroke of the feed-post to be varied in length, and means to adjust the position assumed by the feed-post at one terminus of the feed-stroke.

5. The combination with a feed-post, a feeding implement supported thereby and a swinging-arm connected with the said feedpost, of a link, and vibrating arm constituting an operating toggle for the said feed-post, an actuating cam for the said toggle, means to adjustably connect the said link to the said swinging-arm to enable the feed-stroke of the feed-post to be varied in length, and

means to adjust the position assumed by the feed-post at one terminus of the feed-stroke.

6. The combination with a feed-post, and a feeding implement supported thereby of a vibrating arm, a link joined to the said arm and in operative connection with the said feed-post, actuating means for the said vibrating arm, and an adjustable eccentricmounting for the said vibrating arm to enable the position assumed by the feed-post at one terminus of the feed-stroke to be adjusted.

7. rl`he combination with a feed-post, and a feeding implement supported thereby of a vibrating arm, a link oined to the said arm and in operative connection with the said feed-post, an actuating cam for the said vibrating arm; and means for changing the relation of the centers of the vibrating arm and the said cam to vary the position of the feeding implement at one eXtreme of its feeding stroke.

8. The combination with a feed-post, a feeding implement supported thereby and a swinging arm connected with the said feedpost, of a vibrating arm, a link joined to the said arm, an actuating cam for the said vibrating arm, means .to adjustably connect the said link to the said swinging arm to enable the feed-stroke of the feed-post to be varied in length, and an adjustable eccentricmounting for the said Vibrating arm toenable the position assumed by the feed-post at one terminus of the feed-stroke to be adjusted.

9. The combination with a feed-post, a feeding implement supported thereby and a swinging arm connected with the said feedpost, of a vibrating arm, a link pivotally joined to the said vibrating arm, an actuating-cam for the said vibrating arm, means to adjustably connect the said link to the' said swinging arm along a curve which in the initial position of the parts is concentric with the point of pivotal connection between the link and vibrating arm, and aneccentricmounting for the said vibrating arm to enable the position assumed by the feed-post at one terminus of the feed-stroke to be adjusted.

10. The combination with a feed-post, or head, a carrier movable thereon toward and from the work, and a Work-penetrating feeding implement carried by the said carrier, of a link having one end thereof in operative connection with the said feed-post, a vibrating arm provided with a fixed yoke or fork, a cam fitting within the said fork, the other end of the said link having pivotal connection with the said vibrating arm at a point immediately adjacent the place of engagement between the said cam and the said yoke or fork and a rotating shaft on which said cam is fbred, the strains incident to operation acting diametrically with respect to the said cam'and shaft. y v y 1 1. yThe combination with a feed-post, and

ja feeding-implement supported thereby of a link having one end thereof in operative con- ,n nection ywith the said feed-post, a vibrating karm provided with ayoke or fork, a rotating cam .fitting withinL the said fork, the other end of the said link having pivotal connection r`with. kthe said vibrating arm at a point adjacent the place of engagement between the saidfcam and the said yoke or fork, and

ymeans,torfadjustthesaid vibrating arm lengthwise Lto vary thefposition assumed by ,the feed-post at one terminus of the feedstroke. f

.12. Ingcombination, ina sewing machine feed-mechanism, a feed-post or head a reciprocating member connected with the said feed-post or head and having parallel sideportions which are ycorrespondingly slotted,

` .ar bolt extending across the said member, occupying the slots of the side-portions thereof, and adjustable in the said slots, a

" ,j tionsk of the member aforesaid and operating 35 f vices for operating the said carrier to cause means for ythe said link.

13,. kln a sewing machine, the combination with a work-penetrating feeding implement, a carrier for the said implement, and dethesaid implement to penetrate the material which is being operated upon, of atoggle which is operatively connected to communicate feed-movements to the carrier and implement and by toggle-action occasionmg c ythe said feed-movements with a dwell therein ofdefinite extent while the said im lef, n ymentisr yentering and leaving the materia 14,. In a sewing machine, the combination i with a work-penetrating feeding implement,

acarriervfor the said implement, and devices for operating the said carrier to cause the said; implement to penetrate the material 'whichfis being operated upon, of a toggle whichis operatively combined with the said carriery kto ytransmit feed-movements to the carrier and implement, and a cam opera- ,tively-combined with the said toggle and ac- 5,5

tuatingvthe latter to occasion the said feedmovements with a dwell therein of deiinite extent while the said implement is entering and leaving the material.

15. ln a sewing-machine, the combination vwitha needle, a needle-carrier, and, devices for operating the said needle-carrier to cause ythe said needle y,to penetrate the material which kis being operated upon, of a toggle operatively connected to communicate feedmovements to thesaid needle-carrier and by varied 'its toggle-action occasioning the said feedmovements, means to actuate the said toggle, and means to adjust the initial position of the needle-carrier and needle in the said feed-movements.

16. In a sewing-machine, the combination with a needle, a needle-carrier, and devices for operating the said needle-carrier to cause the said needle to penetrate the material which is being operated upon, of a toggle comprising a member having the outer portion thereof provided with a stationary pivotal mounting, and a second member having the transmitting portion thereof operatively connected to communicate feed-movements to the needle-carrier and needle, the saidl toggle by its toggle-action occasioning the said feed-movements, means to actuate the said toggle, and means to adjust the pivot of the member first-mentioned to vary the initial position of the needle-carrier and needle in the said feed-movements.

17. ln a sewing-machine, the combination with a needle, a needle-carrier, and devices for operating the said needle-carrier to cause the said needle to penetrate the material which is being operated upon, of a vibrating arm, a link joined to the said arm and operatively-connected to communicate feed-movements to the said needle-carrier and needle, actuating means for the said vibrating arm,

Y and an adjustable eccentric mounting for the said vibrating arm to enable the initial position of the needle-carrier and needle to be 18. ln a sewing-machine, the combination with a needle, a needle-carrier, and devices for operating the said needle-carrier to cause the said needle to penetrate the material which is being operated upon, of a vibrating arm having a fork or yoke, a link joined to the said arm and operatively connected to communicate feed-movements to the said needle-carrier and needle, a rotating actuating cam for said arm working within the fork or yoke thereof, and an adjustable eccentric mounting for the said vibrating arm to enable theinitial position of the needle-carrier and needle to be varied.

19. In a sewing-machine, the combination with a needle, a needle-carrier, and devices for operating the said needle-carrier to cause the said needle to penetrate the material which is being operated upon, of a toggle having one member thereof operatively connected to communicate feed-movements to the needle-carrier and needle, and also having the motion-transmitting end of such member adjustable along a curve that is concentric with the pivot of the knuckle of the toggle in the initial position of the parts, the adjustment operating to vary the length of the feed-movement, and means for actuating the said toggle.

20. In a sewing-machine, the combination V with a needle, a needle-carrier, and devices for operating the said needle-carrier to cause the Asaid needle to penetrate the material which is being operated upon, of a toggle comprising an arm having the outer portion thereof provided with a fixed pivotal mounting, and a link operatively connected to conimunicate feed-movements to the needle-carrier and needle, and also having the motiontransmitting end ol' such link adjustable along a curve that is concentric with the pivot of the knuckle of the toggle in the initial position of the parts, the adjustment operating to vary the length of the feed-movement, and a rotating actuating cam engaging with the said arm.

21. In a sewing-machine, the combination with a needle, a needle-carrier, and devices for operating the said needle-carrier to cause the said needle to penetrate the material which is being operated upon, of a toggle operatively connected to communicate leedmovements to the said needle-carrier and needle and by its toggle-action occasioning the said feed-movements, means to actuate the said toggle, means to adjust the initial position of the needle-carrier and needle in the said feed-movements, and means to adjust the length of the said feed-movements.

22. In a sewing-machine, the combination with a needle, a needle-carrier, and devices for operating the said needle-carrier to cause the said needle to penetrate the material which is being operated upon, of a toggle operatively connected to communicate feedmovements to the said needle-carrier and needle, comprising the vibrating arm and link, means to actuate the said arm, means to adjust the pivotal mounting of the said arm to vary the initial position of the needlecarrier and needle in the said feed-movements, and means to adjust the length of the feed-movement.

23. In a sewing-machine, the combination with a needle, a needle-carrier, and devices for operating the said needle-carrier to cause the said needle to penetrate the material which is being operated upon, of the toggle` operatively connected to communicate feedmovei'nents to the said needle-carrier and needle and comprising the vibrating arm and link, actuating means in connection with the said arm, the adjustable pivotal mounting for the said arm by which the initial position of the needle-carrier and needle in the feed movements may be varied, and means to adjust the motion-transmitting portion of the said link along a curve that is concentric with the knuckle of the toggle in the initial position of the parts to vary the length of the feed-movement.

24. In a sewing-machine, the combination with a needle, a needle-carrier, and devices for operating the said needle-carrier to cause the said needle to penetrate the material which is being operated upon, of the toggle operativelyT connected to communicate feedmovements to the said needle-carrier and needle and comprising the vibrating arm having the fork or yoke and the link, the rotating actuating cam working Within the said fork or yoke, the adjustable pivotal mounting for the said arm by which the initial position of the needle-carrier and needle in the feedmovements may be varied, and means to adjust the motion-transmitting portion of the said link along a curve that is concentric with the knuckle of the toggle in the initial position of the parts to vary the length ol' the feed-movement.

25. In a feed-mechanism forsewing-machines, the combination with a needle, its bar, a post or head having a guide in which the said bar reciprocates, and means to maintain parallelism in the different positions of the post or head, of a toggle in operative connection with the said post or head, and actuating means for said toggle effecting feed-movements of the post or head by producing movement of the knuckle of the toggle transverselyT with respect to the line joining centers.

26. In a feed-mechanism for sewing machines, the combination with a needle, its bar, a post or head having a guide in which the said bar reciprocates, and means to maintain parallelism in the different positions of the post or head, of a toggle comprising a link and vibrating yoke-shaped arm in operative connection with the said post or head, and a cam Working in the yoke of the said arm and causing feed-movements of the post or head by producing movements ol the knuckle of the toggle transverselyT with respect to the line joining centers.

27. In a feed-mechanism for sewing machines, the combination with a needle, its bar, a post or head having a guide in which the said bar reciprocates, and parallel links controlling the said post or head in its movements, o'll a toggle in operative connection with the said post or head, and actuating means lor said toggle effecting feed-movements of the post or head by producing movement of the knuckle of the toggle transverse y with respect to the line joining centers.

28. In a feed-mechanism for sewing machines, the combination with a needle, its bar, a post or head having a guide in which the said bar reciprocates, and parallel links controlling the said post or head in its movements, of a toggle in operative connection with the said post or head, a-nd a cam actuating the said toggle and causing feed-movements ofl the post or head by producing movements of the knuckle of the toggle transversely with respect to the line joining centers.

29. In a sewing machine in which a hooked4 nation with said implements and the actuating connections "therefor, and the feedpost, of a toggle which is operatively connected to communicate feed-movements to the 'leed-post and by toggle-action occasioning the said 'feed-movements with a dwell therein oi' delinite extent while the feeding implement is entering and leaving the work. l

- 80. yIn a `feedmechanism for sewing mayfcliiiies, the combinationwith a needle, its

yh2o

- y, y* length.

bar, and a post orfhead having a guide in f vwhich the'said banreciprocates, oi a toggle in operative connection with the said post or head and comprising a vibrating arm and a link, a cam engaging with the said arm and occasioning feed-movements of the post or head kby producing movements oi the knuckle of the toggle transverselywith respect to the line joining centers, and means to adjust the yinitial position ofthe post or head.

k31. In a feed-mechanism for sewing machines, the combination with a needle, its

bar, a post orfhead having a guide in which the said bar reciprocates longitudinally, and a swinging arm connected with the post or head, ol a toggle comprising a link and vi- .bratingarin, actuating means for said toggle and means to adjustably connect the toggle to the said swinging arm to enable the l'eedg stroke of the post or head to be varied in j 3,2.'In a feed-mechanism for sewing machines, the combinationL with a needle, its bar, a post or head having a guide in which the saidbar reciprocates longitudinally, and

i a swinging arm connected with the said post or head, oi a toggle comprising a link and vibrating arm provided with a -lixed yoke, an

,n actuating cam for said toggle working in the yoke of the said vibrating arm, and means to v*adjustably connect the toggle to the n j swinging arm to enable the feedestroke of the post or head to be varied in length.

f 33.y In 'l'eedanechanism `for sewing may chines, the combination with a needle, its bar, and a post or head having a guide in i f which the said bar reciprocates, of a link and vibrating arm constituting an operating [toggle jl'or the said post or head, and actul ating means for the said toggle, one end of said link having operative connection with the post or head and being adjustable along a curve which is concentric with the pivot ol toggle for the said post or head, actuatingmeans for the said toggle, one end of said link having operative connection with the post or head and being adjustable along a curve which is concentric with the pivot of the knuckle in the initial position of the arts, the adjustment operating to vary the ength oi feed, and means to adjust the initial position of the post or head.

35. ln feed-mechanism for sewing machines, the combination with a needle, its bar, and a post or head having a guide in which the said bar reciprocates, oi a link and vibrating arm constituting an operating toggle for the said post or head, an actuating cam engaging the said vibrating arm, one end oll said link having operative connection with the post or head and being adjustable along a curve which is concentric with the pivot of the knuckle in the initial position of the parts, the adjustment operating to vary the length oi 'feed and means for changing the relations of the centers of the cam and the vibrating arm to vary the position of the needle at one extreme of its feeding stroke.

36. ln feed-mechanism for sewing machines, the combination with a needle, its bar, and a post or head having a guide in which the said bar reciprocates, oi a link and vibrating arm constituting an operating toggle for the said feed-post, an actuating cani engaging the said vibrating arm, one end of said link having operative connection with the post or head and being adjustable along a curve which is concentric with the pivot of the knuckle in the initial position of the parts, the adjustment operating to vary the length of feed, and means to adjust the initial position of the post or head.

In testimony whereof I affix my signature presence oi two witnesses.

FRANK WV. MERRICK.

Vitnesses:

CHAs. F. RANDALL, EDITH J. ANDERSON.

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