US1671124A - Button-sewing machine - Google Patents

Description

R. L. PLUMLEY BUTTON S May 29. 1928.

EWING MAbHmE Filed Aug. 2, 1923 May 29, 1928. 1,671,124

R. L. PLUMLEY BUTTON smwme momma File g- 1923 4 Sheets-Sheet 2 May 29, 1928.

BUTTON SEWING MACHINE PLUMLEY &9?

4 Sheets-Sheet 3 In Ill l llllllllll I: I lllulllll llll lllllillllll Filed Aug. 2, 1923' Patented May 29, 1928;

UNITED STATES PATENT OFFICE,

RAYMOND L. PLUMLEY, or BROOKLYN, NEW YORK, AssIeNon 'ro FREDERICK osnui comrnnm'or NEW YORK, 1v. Y.,

A CORPORATION OF NEW YORK.

nnrzron-snwme MACHINE.

'Applicatio n filedAugust 2, 1923. Serial No. 655,279.

This invention relates to machines for sewing on buttons and has for one of its objects the provision of means by which the machine automatically stops after either of two predetermined numbers of stitches have been made, the machine being readily adjustable by merely throwing a lever to sew one or the other number of stitches at will. 5 A further feature of the invention-relates to a safet device which acts to prevent the raising 0 the button clamp from the Work when the machine is running and to prevent the starting of the machine except when the button clamp is in position to properly present the button to the work. 7

Another feature relates tomechanism for moving the needle laterally to cause it to pass through each of a pair of holes in the button.

For a more complete understanding of this invention, together with other features and advantageous details-and combinations of parts, reference may-be had to the accompanying drawings in which:

.Fi re l is a side elevation of themachine showing the side cover plate removed and certain parts in dotted lines. I

Figure 2 is an end elevation of the needle bar and casing.

Figure 3 is a horizontal 33 of Figure 1. Figure 4fis an inverted plan of themachine head and mechanism carried thereby.

Figure 5 is a top plan of the machine.

Figures 6 and 7 are vertical sections on section on line line 66 and 77, respectively, of Figure 1.

Figure 8 is a vertical section on line 88 of F1gure7.

Figure 9 is a horizontal section on line 99 of Figure 8.

Figure 10 is a-plan of an adjustable cam,

Figure 11 is a section on line 1111 of Figure 10.

Referring more particularly to Figure 1,

at 1 is indicated a substantially rectangular.

hollow supporting frame to which is hinged the machine head 2. This head is formed with a forwardly extending table portion 3' housing being positioned above the-table portion 3 in the usualmanner.

The button to be sewed'is carried by a button clamp 7 of any suitable description which is designed to support the button against'the upper face of the work which rests on a cloth plate 60. The button clam is fixed as by screws 133 to the forward end of an L-shaped arm 131 but is designed to be pivoted at its rear end to the machine in such a manner that its forward end may be raised to raise the button clamp from the. work. As shown this arm 131 is designed to be pivoted interchangeably to ears 130 of a slide 100 to which the cloth plate may be attached or' to a lug 144 extending from the forward face of the frame post 4, this being 79 for a purpose not material to this invention.

Screws 133 also serve to attach to the button clam a plate 135 having at one end an up w ward ly extending ear 136 to which a chain 137 may be attached by which the button clamp may be raised upwardly from the cloth plate. The button clamp is normally urged downwardly toward the cloth plate in order to clamp work thereagainst as by means of a leaf spring 138 fixed' at its rear downwardly turned end 139 to the forward portion of the frame post 4, its forward end engaging the upper face. ofthe plate'135.

The upper end of the chain 137 is connected as shown in Figurel to a screw 146 fixed to the end of an arm 147 made fast to a rock shaft 148. This rock shaft is journaled in bearings 149 and 150, depending from the upper wall of the frame arm 5 and is normally held in position to permit the button clamp to rest on the work. For this purpose a spring 151 coiled about therock shaft has one end engaged with the bearing 149 and the other fixed to a collar 152 made fast to the shaft 148. Adjacent the collar 152 is also fixed another collar 153 to which is attached one end of a coil spring 154 surrounding the shaft, its other end being fixed to a collar 155 to which is attached a finger 156. projecting through the upper wall of the frame arm 5 and which is rocked by the turning of'the rock shaft to pull off thread from-the supply between the needle bar and an automatic thread lock shown at 157. A similar finger 158 is fixed to the rock shaft 148 and acts to pull off the thread between the thread lock 157 and the fixed and variable thread tension mechanisms 159 and 160. At 161 is shown an arm clamped to the'rock shaft 148, this arm extending through the side wall adjacent the upper end of the frame portion 4 and to its outer end is pivoted a rod 163, which projects through the portion 2 and has fixed at its lower end a chain 164 extending to a treadle (not shown). By depressing this treadle the shaft 148 may be rocked to raise the arm 147, which through the chain 137 raises the button clamp from the cloth plate.

Referring to Fi ures 1, 2, and 6, it will be seen that the needle bar housing 6 comprises a rear vertically extending plate to the forward face of which is pivoted on a pivot bolt 171, a short sleeve 172 through which slidably passes a needle bar 173, the needle bar being partially enclosed by a casing plate 174 screwed to the plate 170 by screws 175 (see Figure 2). At the lower end of the needle bar is fixed a need e 179 having an eye 180 adjacent its point. The needle bar is reciprocated axially to give the sewing and retracting strokes to the needle by a rock shaft journaled at its rear end in the bearing 150 and at its forward end in a boss 186 projecting inwardly from one face ofthe frame arm 5. The forward end of this shaft carries a crank arm 187 to the free end of which is pivoted a link 188, the upper end of which is adjustably pivoted by a clamp collar 189 to the needle bar 173, this clamp collar also carrying the movable take-up member 176 which projects through a slot 177 in the plate 174. A fixed take-up element 178 is shown as made fast to the forward face of this plate. The shaft 185 is rocked by means of a crank arm 190 carried at its. rear end back of the bearing 150, and,

to whichis'juivoted a:- connecting rod-191,

the lower end of 'which'is formed as a strap '192 for an eccentric 193 fixed to the main operating shaft 82. v

Besides the sewing and retracting strokes for the needle bar it is given a lateral 1m.

tionto pass through each of a pair of holes in the button held by the button clamp and l for this purpose it is designed to be rocked about a pivot 171. The needle bar passes through a sleeve 195 having a rearwardly. extending pivot pin 196 journaled in the forward end of a lever arm 197, This arm 197 is provided with a slot 198 adjacent its forward end (see Figure 3) through which passes a screw 199 threaded in a cross member 200 of the frame arm 5, this furnishing a sliding guide bearing for this portion of the arm holding it in osition longitudinally and vertically. T is arm is pivoted on a pivot pin 201 (see Figures 1, 3 and 6) which has journaled thereon a collar or bushing 202 slidable in a slot 203 in the arm.

The lower end of this pivot is -reduced in diameter and threaded and engages amating threaded opening in asupporting block or hearing 204 which is slidable along the upper edge of a rib 205 projecting upwardly from the lower wall of the frame arm 5. This block 204 is adjustable longitudinally of the rib 205 and for this purpose is r0 vided with an upstanding flange 206 a ong one .side thereof into which is threaded a stud 207. This stud extends through a slot 208 (see Figure .1) in the side wall of the frame portion 5 and has threaded on its outer end a thumb nut 209 by which the position of the block 204 may be fixed. By sliding the block 204 the position of the fulcrum for the lever 197 may be adjusted as desired by which means the lateral throw of the needle bar may be adjusted to correspond with the spacing of the holes in the button to be sewed.

The arm 197 is rocked by means of a cam 220 which is shown detached in Figures 10 and 11, this cam being fixed to the upper end of a vertical shaft 76. This shaft-76 extends through the frame post and is journaled in lugs 77 extending rearwardly from the forward face of this post. This shaft is rotated in time with the sewing instrumentalities by a worm gear 80 thereon with which meshes a worm 81 on the main drive shaft 82. It is provided with a cam path 221 in its upper face within which rides a cam follower 222 depending from the rear end of a plate 223 overlying the rear curved extension 224 of'the lever 197. The cam path is so shaped that the needle bar-- is moved laterally while it is raised out from the button and the work alternately from one side to the other in order that its'sewing througha pair of holes in thebutton, and then at the end of the desired stitching operation the needle is caused to make two strokes through the same hole of the button in succession for the purpose of tying the thread. Since this machine is of the single threadtype a double pass of the needle.

l IU

strokes may be ,caused tojpass alternately through the same hole in the button effects this tying action.

Positioned within. the table portion 3 is the mechanism for taking the loops of thread from the needle and so relating them as to form a stitch, this mechanism comprising the usual looper 230 (see Figure 4). After having made the desired number of st tches through the button and the work it sdesirable that the machine stop automatically and for this purpose a stop mechanlsm is shown cooperating with tight and loose pulleys 260 and 261 carried by the maindrive shaft 82. While this may be of any suitable type, it is herein shown as that more fully illustrated, described and claimed in the application for patent of Harold W.

Morris, Serial No. 643,898, filed June 7, 1923, for stop mechanism. For the present purpose it'is sufficient to' state that it includes a belt shipper 270 for shifting the belt between the tight and loose pulleys and that this shipper is movable parallel to the axis of the drive shaft being fixed to a pair of rods 275 and 276 which extend through guide openings in the rear end of the machine head. Within the frame, as shown in Figure 4, the rod 275 has fixed thereto a collar 277, between which and a fixed lug 278 extending inward from the machine frame, reacts a compression spring 27 9 which tends to retain the collar 2'77 pressed against a sound deadening and cushioning washer Y of felt or other suitable material shown at tion to retain the belt shipper fingers in position to hold the belt on to the tight pulley. This latch is fixed at the lower end of a rock shaft 284 which extends upwardly from the frame portion 2 and is journaled in a bearing 285 (see Figures 1 and 7) adjacent the rear end of the frame portion 5. Above this bearing shaft 284 has fixed thereto an arm 286 having-a cam follower 287 which is designed to be struck by 2. lug projecting from the lower face of the cam 220, as will later be described, in order to rock the shaft 284 sufficiently to disengage th'e'latch hook 283 from the block 282. This latch hook may also be disengaged by hand at any time if desired, for this purpose a handle 288 being shown as made fast thereto at its inner end and projecting outwardly of" the frame through a slot 289. By tripping the latch hook 283 the stop motion is actuated by the spring 279' to stop the machine.

It is desirable that during the normal op- Y eration of the machine the operator may not raise the button clamp from the work so that the work and the button are always in complete control of the machine while the sewing is being effected Provision has been therefore made to prevent the raising of the button clamp while the machine is running. For this purpose the rod 163 (Figures 4 and 7), above mentioned, where it passes through the frame ortion 2 is notched out as shown in dotte lines at 310 and through this notched portion may pass a horizontally disposed rod 311. As shown in Figure 4 this rod 311 terminates at 312, the notch in the rod 163 and the end of the rod 311 being so relatively placed that when the rod 311 is in its'rearward position, but not otherwise, the rod 163 may play freely up and down therepast and that when the rod 276 extending from the body portion of the shipper carries a link315 whose forked end 316 engages a pin 317 fixed tothe rod 311. By this means it is rendered impossible for the button clamp to be raised while the machine is in operation and it is also rendered impossible for the machine to be started be fore the button clamp has been depressed. The stop motion may be actuated by the op erator to permit the machine to start, this being accomplished by a bell. crank lever pivoted in the base 1, one arm 324, of which engages a pin 325 extending from the latch collar 281 and to the other arm of which is fixed a chain extending to a suitable treadle (not shown). The bell crank is normally held in position to raise the treadle by a spring 326 reacting between it and a fixed poiiit on the frame base 1.

Provision has also been made in this machine by which the number of stitches made before the tying stroke of the needle and stopping of the machine is effected may be varied. For this urpose the cam 220 above mentioned is ormed with a slide 350, as shown best in Figures 10 and 11, this slide having therein a pair of spaced cam grooves 351 and 352.. The groove 352 when brought in registry with the cam groove 221 of the main portion of the cam by moving the slide to its. outer position conforms to [the arc of a. circle struck about the axis of the shaft 76 as a center, this being shown in Figure 10. When the slide 350 is in its ly through each of a pair of thread holes in,

the button, arranged in line transversely of the mach ne, the button having been placed 1n the button clamp in this position. It will be noted that the series of jogs begins at the point marked ain Figure 16, and that they are equally spaced when the groove 351 is in communication with the cam groove 221 up to the pointy Between the point g and w the cam groove extends along the arc of a circle about the axis of the shaft 76 as a center. When'this portion of the cam is active, the'needle is not moved from one thread hole to the next and therefore passes twice through the same thread hole. This acts in a well known manner to lock the thread instead of causing a stitch to be made, the loop caused by the first pass through the needle hole being thrown over the loop caused' by the next pass, the thread being then retracted through the thread hole and forming the knot. At the end of this stroke the stop motion is caused to be effective, for this purpose an abutment screw 354 extending from the lower face of this cam striking the stop cam follower 287 as above described. When the slide 351 is in its outer position two strokes of the needle are effected through the same hole of the button when one half of the entire cam path of the cam has been traversed, this being caused by the arc shape of the cam groove 352. When the slide is moved into this position, therefore, a stop screw 355 fixed thereto and projecting through a slot 356 in the body of the cam is also in osition to contact and move the sto cam ollower 287 to stop the machine. W en the cam slide is in its inner position this stop screw 355 fails to strike the stop cam follower and is therefore ineffective to stop the machine.

For the purpose of determining which of the grooves 351 and 352' shall be operative at any particular time, the slide 350 has depending therefrom through a slot 357 in the main portion ofthe cam, a pin 358 which is adapted to ride in ..either of a pair of grooves 359 and 360 of the block 361 fixed tothe upper face of the upper bearing 77 in which the shaft 76 is' journaled. This block 361' has a base portion 362 extending laterally therefrom as shown in Figures 8 and 9 and pivoted at 363 to ride on the upper face thereof is a switch element 364 having a pair of spaced walls 365 and 366 (-Figure 9) converging toward the portion of the block carrying the grooves 359 and 360 with either of which it may be caused to register by turning about its pivot 363. This. switch element 364 has. fixed thereto a handle element 367 which carries on its outer end a latch collar 368 pressed inward- 1y against a latch plate 370 fixed to the outer'face ofthe frame post 4 by a spring 369 seated therein and surrounding the element 367. These parts are so positioned that the pin 358 rides between the more widely open ends of thewalls 365 and 366 of the switch element and by them is directed into either of the slots 359 or 360 of the block 361, depending on the position of the handle element 367. When the parts are positioned as shown in full lines in Figure 9, the pin 358 is directed into the groove 359, but if the handle 367 is moved to the dotted line position, the pin 358 is guided into the groove 360. When the pin 358 rides into the groove 359, the slide.

350, is in its inward position with the cam groove 35l-.therein in operative position so that the stitching strokes of the needle are effected while the cam follower passes from the point on to the point 3 at which time a knotting stroke 0 the needle is effected and the machine is stopped. If the pin 358 rides into the groove 360 the slide 350 is in its outer position, bringing-the cam groove 352 into registry with the cam groove 221. Under these conditions the needle is given a thread tying stroke when the cam is rotated one half a revolution and the machine then is stopped by the action of the.

It is therefore possible to sew two different numbers of stitches before the machine is stopped, the mechanism being changed at will from one setting to the other.

When the machine is stopped it is also desirable to cause the thread to be clamped at the clamp 157 shown in Figures 1 and 5 in order that on raising the button clam from the work the thread may not pay 0 -through the needle but may be held so that the raising of the button clamp acts to break the thread at the knot. As shown in Figure 1, this clamp 157 comprises an upper clamping member 380. under which the thread passes between the fingers 156 and158 and a lower clamping member comprising ahead 381 on a plunger rod 382. Fixed to this plunger rod within the frame portion 5 are a pair of collars 383 and 384. A spring 385 surrounding this rod bears between the collar 383 and the inside face of the frame portion 5 and acts to urge the head 381 depressed within its socket 386 and out of clamping engagement with the thread. At the lower end of the bearing bracket 150 is pivoted an arm 387, the outer end of which is slotted to receive the lower end of the plunger rod 382. A spring 388 surrounds this rod and reacts between the collar 384 and a washer 389 restin on the top face of the lever 387. It is t erefore evident that by raising the lever 387 the plunger is pressed upwardly through the spring 388 and in opposition to the spring 385, raising the head 381 to clamp the thread passed betweenit and the top clamp member 380. The plunger rod 382 is provided with a headed extension 390 projecting above the clamping plate 380 by which it may be pressed down manually by the oper ator to release the clamping action when desired. A bolt 391 having a rounded head is fixed to lever 387 intermediate its ends, a nut 392 being shown as applied to its upper end to fix itinposition, the bolt head being in position to be contacted by a projection 393 extending u wardly from the cam slide 350 and be raised thereby when the cam 220 has completed its revolution and the machine is to be stopped. This portion 393 is of suflicient length axially of the slide to be operative in both operative positions of the slide. The slide also carries a second a projection 394 which is shown as substantially hemispherical and which is operative to trip and raise the bolt 391 only when the slide 350 is in its outer position. When the bolt 391 is struck by either of these elements to 393 or 39 1 the free end of the lever 387 is raised upwardly to clamp the thread The thread passes through the variable tension 160 at the back of the machine, the tension of which is increased and decreased at 11 suitable times at the stitch-forming operthread clamp 157, past the finger 156 and ation in the usual manner, through the adjustable tension 159, through a stationary guide 400, past the finger .158, through the through a stationary guide 401. From there it passes to a guide 402 at the top of the needle bar housing 6, about the takeup device, and then to the needle. After the machine stops the operator depresses the 5% button clamp treadle to raise the clamp ton clamp.

Having thus described an embodiment of this invention it should be evidentto those skilled in the art that many changes and modifications may be made therein without departing from its spirit or scope as defined strokes and then a knottin by the appended claims.

I claim:

1. In a,machine of the class described, means for holding a button and work in position to fasten the button to the work, sewing instrumentlities including a needle for sewing the button to the work, means for imparting a definite number of sewing stroke to said needle, means for stopping t e machine after the completion of the knotting stroke, and means-gacting to change one of said number of needle strokes from a sewingfto a knotting stroke, and for actuating said stopping means immediately thereafter to stop the machine. 7

2. In a machine of the class described, means for holding a button and work in position to fasten the button to the work, sewing instrumentalities including a needle for sewing the button to the work, means for imparting work piercing and retracting strokes to said needle, means for causinga definitenumber of said piercing and retracting strokes to take place alternately through each of a pair of holes in the button, and then to make two strokes in succession ,throu'gh one of said holes, means acting after the com letion of said two strokes to stop the mac inc, and means operable to vary the number of needle strokes in alternation through-the two holes in advance of the two strokes through the same hole.

3. In a machine of the class described, means to hold a button and work in position to sew the button to the work, means including a needle for sewing the button to the work, means for imparting needle strokes through holes 'in the button and through the work, means including a cam for causing a definite number of said strokes to take place alternately through each of two holes in the button and then two strokes in succession through the same hole, said cam having a pair of spaced cam paths selectively mating a cam path in the remaining portion thereof, one of said pairs ofcam paths being shaped to cause said needle to make a pair of strokes in sequence through one of said two holes, and the other of said pair of cam paths being shaped tocause a sequential pair of needle strokes to take place alter- I nately through each of said pair of holes, and means actuable to cause either of said pair of cam paths to be operative to control said needle while causing the other to become inoperative.

4. In a machine of the class described, means to hold a button and work in position to sew the button to the work, means including a needle for sewing the button to the work, means for imparting needle strokes through holes in the button and throughthe work, means including a cam for causing' a definite number of said strokes to take place alternately through each of two holes in the button and then two strokes in succession through the same hole, said cam having apair of spaced cam pathsselectively mating a cam path in the remaining portion thereof, one of said pair of cam paths being shaped to cause said needle to make a pair of strokes in succession through one of said two holes, and the other of said pair of cam paths being shaped to cause a sequential pair of needle strokes to take place alternately through each of said pair of holes, means actuable to cause either of said pair of cam paths to be operative to control said needle while causing the. other to become inoperative, a stop motion, means for causing said stop motion to become active to stop the machine after said pair of needle strokes through one button hole, have been made, and means actin after said cam portion has been adjuste to render said one cam path active to actuate said cam stop motion after said one cam path has functioned.

5. In a machine of the class described, instrumentalities for forming stitches and tying the thread including a cam having a portlon of its cam path formed to cause said instrumentalities to make stitches, and a portion of its cam path formed to cause Ice llU

adjustable to c instrumentalities to tie the thread, and means on said cam for causln sa1d stop motlon to stop said instrumentahties after the thread erations to said instrumentalities, and the other being shaped to impart a thread-tying operation thereto, and means adjustable to change said cam portion automatically from one to the other of its mating relations.

6. In a machine of the class described, instrumentalities for forming stitches and tying the thread including a cam hav1ng a portion of its cam path formed to cause said instrumentalities to make stitches, and a portion of its cam path formed to cause said instrumentalities to tie the thread, a stop motion and means on said cam for causing said stop motion to stop said instrumentalities after the thread has been tied, said cam having a movable portion having two spaced cam paths therein selectively mating the cam path in the remainder of said cam, one of said two paths being shaped to impart stitch-forming operations to said instrumentalities, and the other being shaped to impart a thread-tying operation thereto, means adjustable to change said cam portion automatically from one to theother of its mating relations, a stop motion, and means on said cam for causing said stop motion to stop said instrumentalities after the thread has been tied.

7 In a machine of the class described, instrumentalities for forming stitches and tying the thread including a cam having a por-- tion of its cam path formed to cause saidinstrumentalities to make stitches, and a portion of its cam path formed to cause sald instrumentalities to tie the thread, said cam having a movable portion having two spaced cam paths therein selectively mating the cam path in the remainder of said cam, one of said two paths being shaped to impart stitch-forming operations to said instrumentalities, and the other being shaped to impart a thread-tying operation thereto, means matically from one to the other of its mating relations, a stop motion, and means on said cam for causing said stop motion to stop said instrumentalities after the thread has been tied.

8. In a machine of the class described, instrumentalities for forming stitches and tying the stitching thread including a cam having a portion of its cam path formed to cause said instrumentalities to make stitches and another ortion formed to cause said instrumentalities to tie the thread, a part of saldstitch-making path being formed one portlon of said cam movable with relation to ange said cam portion autothe remainder thereof, said portion having a second cam path shaped to cause said instrumentalities to tie the thread and registering with the cam path on the remainder of said cam on movement of said portion, a stop motion, means on said cam for actuating said stop motion after the thread has been tied and means on said cam path movable into and out of stop-motion-actuating position, and being .in stop-motion-actuating position when the thread-tying path of said portion is in operative relation to the cam path of the remainder of said cam.

9. In a machine of the class described, instrumentalities for forming stitches and tying the thread including a cam having a portion of its cam path formed to cause said instrumentalities to make stitches and a portion of the cam path formed to cause said instrumentalities to tie the thread, said cam having a movable portion having two spaced cam paths therein selectively mating the cam path in the remainder of said cam, one of said two paths being shaped to impart stitch-forming operations to said instrumentalities and the other being shaped to impart a thread-t ing operation thereto, means adjustable to c ange said cam portion automatically from one to the other of its mating relations, a' thread clamp for clamping the thread in advance of the work, and means on said cam and on said cam portion for actuating said thread clamp after the thread has been tied, said cam portion means being inoperative when its stitch-forming path is in operative position.

10. In a machine of the class described, instrumentalities for forming stitches and tying the thread including a cam having a portion of its. cam path formed to cause said instrumentalities to make stitches, and a portion of its cam path formed to cause said instrumentalities to tie the thread, said cam having a movable portion having two spaced cam paths therein selectively mating the cam path in the remainder of said cam, one of said two paths being shaped to impart stitchforming operations to said instrumentalities, and the other being shaped to impart a thread tyin operation thereto, means adjustable to c ange said cam ortion from one to the other of its mating relations, a

for moving said needle bar laterally comprising a lever having operative engagement with said bar at one end, means for imparting motion of fixed amplitude to the'other end of said lever, a block slidable lon'gitudh nally within said frame arm, a fulcrum for said lever carried by said block and slidable with relation to said lever, whereby the throw of said bar may bevaried by adjusting the position of said block, and means for holding said lever in definite longitudinal p sition.

- of said bar ma be varied by adjusting the position of sai block, and a guide element passing through a slot laterally of said lever for holding said lever from movement with said block. I

13. In a machine of the class described, the combination with a frame arm and a needle bar carried at the free end of said arm and movable laterally thereof, of means for moving said needle bar laterally comprising a lever having operative engagement with said bar atone end, means for imparting motion of fixed amplitude to the other end of said lever, a guide rib on said frame arm, a block supported on said rib and ad-.

justable longitudinally thereon, a fulcrum for said lever carried by said block and slidable with'relation to said lever whereby the throw of said bar may be varied by adjust-- ing the. position of said block, and means for holding said lever'in definite longitudinal position.

14. In a machine of the class described,

the "combination with a frame arm and a Y needle bar carried at the free end of said arm and movable laterally thereof, of means for moving said needle bar laterally comprising a lever having operative engagement with said bar at one end, means for imparting motion of fixed amplitude to the other end of said lever, a guide rib on said frame arm, a block supported on said rib and adjustable longitudinally thereon, said frame arm having a slot parallel to the path of motion of said block, a stud fixed to said block and extending through said slot and accessible without said frame arm for adjusting the position of said block,

a thumb nut on said stud for locking the block in position, a fulcrum for said lever carried by said block and slidable with relation to said lever whereby the throw of said bar may be varied by adjusting the position of said block, and means for holding said .lever in definite longitudinal position.

15. In a machine of the class described, the combination with a frame arm and a needle bar carried at the free end of said arm and movable laterally thereof, of means for moving said needle bar laterally comprising a lever having operative enga ement with said bar at one end, means or imparting motion of fixed amplitude to the other end of said lever, a guide rib on said frame arm, a block supported on said rib and adjustable longitudinally thereon, said frame arm having a slot parallel to the path of motion of said block, a stud fixed to said block and extending through said slot and accessible without said frame arm for adjusting the position of said block, a thumb nut on said stud for locking the block in position, a fulcrum for said lever carried by said blo k and slidable with relation to said lever. wh reby the throw of said bar may be varied by adjusting the position of said block, and a guide element passing through aslot laterally of said lever for holding said lever from movement with said block.

In testimony whereof I have aflixed my signature.

Y RAYMOND L; PLUMLEY.

Images