US1063987A - Sewing-machine. - Google Patents

Description

W. A. MAK. SBWNG MACHINE. APPMGATUJN ULEB AUG. 21. mos` Patented June 10, 19134 3 SHEETS-SHEET 1.

W. A. MACK.

SEWING MACY-HNE,

APPUCATION FILED AUG 21.1906,

1,063,987, Patented June 10,1913.

3 SHEETS'SHEET 3.

UNITED STATES PATENT 0]?I FICE.

XVIL-LIAM A. MACK, 0F CLEVELAND. OHIO. ASSIGNOR TO THE STANDARD SEWING MACHINE COMPANY, OF CLEVELAND, OHIO, A CORPORATION 0F OHIO.

SEVVINGJVIACHINE.

Specication of Letters Patent.

1,063.95 ratemenJtuw1o. 191:1: Application filed August 521 1906. Serial No4 331,428.

To c/1m if muy 1u/cern Il 'the invention also includes novel features lot conatruction of the hol'ihin-case holder wherehy the holder is adapted to permit ot' quick and convenient insertion or removal ot the hol hin-case and without intertereneo with or hy the looper or the guard element carried therewith.

These several features` of invention, and others to he hereinafter referred to in the detailed description ot the invention which follows. are applicahle to either a onealeedle or t\\iouecdlt sewing machine. the same when applied to a tuo-needle machine as' herein illustrated heilig' duplicated and positioned for cooperation with the two needles. (ilertain t'eatures ot' theA invention forming le it known that rimini MACK. citizen ot' the United States, and resident ot (llerelaud, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Sewing- Machines, of which the following is a speci ieation.

This invention relates; to stitclntorining mecaanism adapted for use in either oneneedle or two-needle ioclestiteh sewing machilies. hut more especially designed tor uso in two-needle machines and being so illustrated herein.

The intention includes a rotative needlev thread looper tixedly attached to its actuatingr shaft and comprising a looper-arln preterahl)Y formed in the are ot a circle cor respondingir to thel circular path of morement of the looper and haringr at one cud there' tl a rerersely extended underhangiug loop-seizing hook which is operative to take the thread-loop thrown out hy the needle, carry it partiailr around a correlated hohhiu-case to a point herond the vertical cclr ter ot the same, aud then cast itotl' to lio drawn up h r the talie-up into interlocking engagement with the hohhin-thread to cour plete the .stitch in the usual manner; the .said passage ot' the thrcaddoop ahout the hohltinease as', ettectcd hr the looper lit-ing' in a t path within the outer radius ot' movement i ot the looper hv reason of the position of l the loopkseiziugf hool: tmdcrhaitiringr its car t r \'in, r arm and thereltr :esuriug the passage" of the thread-loot.) ahout the hohltin-f'a's'e with a minimum lcngjjth ot' thread drawn from the spool or other supply.

The inwntiou also include` the comltination with thc loopel' ot' a guard arm so formed and p-'isiticncd relative to its'v eooperating' parts as to lio capahle ot performing' three functions` including. first. pulling' otll sullicieut thread from the hohliiu to t'ot'm l with thtl ucedltetliread the, si ccessire lochstitchcs; secondly. holding: the holthinthread satcly to one side the path otl the rotatire louper hook to avoid accidental mitching' ot the h ,within-thread hy said hoolt; and thirdly. causing' the threatldoop thrown ont la the ncedlc hein;- formed at that side et the needle next the path ot' mmcmeut ot i opened thread loops are engaged h v relathe loopt-r hooltr to he positircliv seized h v ti\'el stationarr \\f'edge-sliaped parts ot the the latter. lhohbinrases. Fig. 5 is a front sectional ever. are particuhirtv adapted to a two-neen dle machine and will he so described and claimed herein.

Referring now to the accompant'ingi drawings formingr part ot this` specification, Figure 1 is a longitudinal sectional elevation of such parts of a two-needle sewing ma-v chine as are neccsstarr to illustrate the invention with the needles yinst entering' the worlt and with the lootua'carried guards just eugijagiuo' the hohhin-thrtatds prepara4 toriv to pulling them from the hohhinsl for the toi-mation ot the next lock-stitch and alz-o movingv them laterally toward each other awa;V troiu the path of movement of the loopcr hooks. Fig. is a similar scctitmal eloration shauiugr' the locpcr devices turned forward from the positions of higj. i. to ahout their limit ot' forward oscillation. and sht'iwin;V how the yQ'uards ha re drawn the ltolthin-tln'eadslaterallrelearof thcpaths et' the looper hooks: while at the same timo engaging' the necdlethrtaulsatone side or the needles to compel their sulrs'ctpicutly formed ioops to project latcrallv into the paths of theloopt-rhoohs. Figxf' is a similar sectional iteration showing' they tirst part of the ro 'terse or rearward oscillatoiwv movement ot the looperswith their hooks just euteringthfy needle-thread loops. Fig. t is a reverse or rear sectional elevation of the same mechanism showing' the needle-thread loops heilig carried around ln' farther rearward oscilla tion of the loopers. and also shows how the the suhjecl-mattcr ot this application. howview, similar io Figs. 1, 2 and 3, with one l of the loopers partly broken away. and illusi trates the limit of rearward oscillation of the loopers with the underhanging looper hooks casting oli1 the threaddoops which are now being drawn u bv the take-up mechanism to complete the stitches. Figs. 6, 7 and 8, are respectively top, bottom and side views of the duplex looper shown in the precedingy figures of the drawings. Fig. 9 is a detail end view illustrating the finger operative devices controlling` the movable walls of the hobbincase holder. Fig. 10 is a longitudinal section of the bobbin-eas` holder on the line a-a in Fig. 9, and illustrates by dotted lines the method of .releasing one of the two bobbin-cases. Figi ,1l is a section on the line limb in Fig. 9 lookingr in a direction toward the arrow points, and indicates by dotted lines the mode of releasing the other bobbincase. Fig. l2 is an e arged side view of one of the bobine-cases 3nd contained bobbin, with the bohi-"n-latc closed. Fig. 13 is a similar side vit sh -ing the bobhin-latch open. Fig. 14 is a c ection taken on the line c-f in Fig. l?. Fig. l5 a plan View of a modified form of loopen; and Fig. itl is a side view of this nioditicat'ion.

First referring more particularly to Figs. l to 8 inclusive of the drawings, the numeral t 1 indicates a horizontal rock-shaftl iournaled in suitable bearings at the under side of the sewing-machine bed-plate 2, and the numeral 3 indicates generally the duplex looper device attached to the front end ofl said rock-shaft. to be supported and actuated thereby. The looper 3 comprises a shanky portion 4 extending radially from the shaft i l, to which it, is held by a set-screw 5, and l havingf at its outer end a laterally extended plate 7 parallel with the axis of the shaft, 1 which plate, in the duplex form of looper herein shown, is provided with two arms; S-S extending forwardly therefrom in the l arc ot' a circle corres]mndiner to the circular l path of movement of the looper and each havingr at its forward end the reversely exi tended underhangingr looiyseizingr hook 9. These hooks are preferably formed witht their points l0 projectingr slightly inwardly beyond the plane of the inner edges of the looper arms 8MS. as best shown in Figs. 6 and 7. in order to move in a path adjacent to the path of movement ofthe vertically reciprocating needles lQ-l2. which latter move through an opening 13 between the l looper arms 814% when descending to throw out the thread-loops to be seized by the looper hooks. and at a pointl opposite or irnmediately aboveJhe hook points l0 the .looner arms 8S are preferably formed` with an upwardly curved portion 14 to prol vide ample clearance space for the thread- 1 loops thrown out by the needles, as shown l in Fig. 3. From their points 10 the looper t hooks gradually widen to considerable width at their heels or rear ends in order to open or spread apart widely the sides of the seized thread-loops preparatory to carrying them around the bobbin-case, in a manner 'o be hereinafter referred to. The triplefunction guard arms carried by the looper and indicated at 1.5--15 are shown as projecting from a fastening` plate 15 secured to the looper plate 7 and as being arranged in av plane between the looper arms 8-8 with a space between their outer edges and the adjacent loeper arms for the passage of the needles and, with a central bobhimthread receiving space or slot 17 between the same. These guard arms, like the looper arms, are also Dreferably curved to substantially conform to the circular path of movement. of the looper and at their outer ends project forwardly beyond the ends of the looper arms and diverge laterally outward from each other in position to engagethe bobbin-threads extending between th'ebobhins and the work: the inner or adjacent edges of the diverging ends of the guard arms forming cam surfaces 18-18 for acting on the bohbin threads in manner assuring the pulling oli of sufficient lengths of thread required in the formation of the successive look stitches, and also the moving of said threads laterally away from the paths of the louper hooks.y while the outer edges 19 of the guard arms at their rear ends are so positioned as to coperate with the needles in a manner to cause the forming thread loops to be thrown out by the needles at that side thereof next the looper hooks and so assure the p'ositixe seizingr of the loops by the hooks, as hereinafter more fully eX- plained.

As will he seen, the follow'ing features are presented in connection with the particular structure of looper. disclosed herein: The edel-cf the hook faciimthe needle space has ,"a major portion of its length in substantial radial alinement with the similar edge '3 of the arm, thereby providing an over-hang-` for the hooi; which substantially covers all hut the point of the/hook and tends to eliminate liability of the hook picking up threads. (either loose. a bobhin-thread, or a. part of the stitlr thread) excepting the thread be practically.v projected under th 3 arm, the exposure of the point of the hook to a straight thread being relatively small. Since the hook extends rearwardly in comparatively close proximity to the arm, and

thereby decreases the liability of such pieking up of threads. the arched portion (i4) is proridcd opposite the point of the hook to increase thc space between the arm and hook und affords a sullicicut clearance to permit a proper projecting of the thread loop tlf bring it under thc arm `of the looper and thus insure tht` licolt cng'ag 'rre the loop7 this clearance being, however, provided only in the immediate vieinitiY of the point of thc hook. the remainder ot' the hook havingr the normal distance between the hook and arm; b v this latterconstruction the hook is not deflected at it`v point out of the normal path j-iovi'led b v the major portion of the remainder of the hook. the entire hook structure extendingr in suhftantially a Single cui-5rd line concentric with the axis of rotation of the louper. Furthermore, as more particularly .shown in Fig. 8. the guard 15 is positioned in advance of the ai'in on the line of the needle path of movement during the vt thdrawal movement ofthe needle,said guard thereinv operating on the thread stiflicicntl'v in advance of the loopei arm to cause the thrfgad loop to be positiveljy projected laterali)v miller the arm`v the edge ofthe arm lacing thi` needle spare forming an abutment operatingr to prevent elongation of the loop in a direction corresponding to the dircetioii of length of the needle, the thread loop being otl a form to actually enter under the looper arm with a thread portion extendine' between the arm and the point of tht` hook.

The eonstructioi f tl improved duplex bobbin-case holder will now be described with more special reference to Figs. 1, 9, l() and 11 ol the drawings. ln the ouler end of the frame or hcd-plate 2. and preferably in axial alnement with the looper shaft l, is fitted a block or support 20 which, when propel-lv adjusted, is fixtedly held in position bv a set-screw 20 threaded into the frame. .Year its edge this block ).0 tixedly carries two inwardly projecting pins Ql-Ql on which are placed three disks or wall sections 235. 34, the opposing tact-s of which have suitable projections Q5 which engage peripheral portions of the bobbiii-cases to loosely support said eases in manner permitting the needle thread loops beingreadily passed around them. The two outside or end disks 2l. are slidabl)Y mounted on the pins 2l` wuile the central disk i2?, is fixed upon the pins. thus permittingv either outsidf, disk 2l. to be moved on the pins rela` tively to the central disk Q23 for permitting insertion or removal of' the hobbin-casc thcrebetweon. .\n v suitable means ina'v be einplgved for so' moving the outer or end disks 2Q. '12%. rclativelv to the central disk f. but l prefer to employy a means that may be readiltY operative from a convenient posi tion at the front end ot the bed-plate and to this cnd provide two actuating devices at the froiiteml ofthe block '20 liavingopcrative connection with the respective disks lthrough the medium of suitable connecting reds; the particular means herein shown for operating the disk Q2 comprising two rods LIC-QG slidably mounted in the block 2O with their inner ends connected to the disk 22 and their outer enlds connected -to an actuating device 27, and tht` means for operating the other disk 2l comprisingr a rod 2f) also slidablv mounted in the block 2Obe` tween the rods 26H26 with its inner end connected to the disk )land its outer end having operative engagement with an actuating device 30. As the disk 24 is movable in a direction inwardl)v or away from the block 20 to permit insertion or removal of a liobbin-case between it and the disk 23, its actuating device 30 is in the forni of a push-plate for pressing inwardly against the engaging rod 2f) to move the connected disk to the open dotted line position shown in Fig. 10 and which puslrplate is shown as carried by a supporting and guiding plunger 31 slidably fitted in a central opening in the block 2t). As the other disk 22 is movable in a direction toward the block 20 to permit insertion or removal of a bobbincase between it and the disk 2, its actuating` device 27 is in the forni of a pull-lever for drawing the connected rods QGQ6 out-- Wardlv to move the. attached disk to the open dotted line position sliown in Fig. 1l, the said lever having a loose connection at one end with the headed ends 26 of the rods 2G and fuk-ruining loosely upon projections 32 on the face side of the block 20. The lever Q7 is also preferably formed with an ottset. therein to project. its lower or actuating end to a. position at the front side of the` block '2O vconvenient to beireachcd by the operator. and is further provided with a central slot. or opening in its upper end to receive the puslrdevice 30 and prevent turning of the saine-from its position for engagement 'with the rod Q9. Spacing sleeves 353-- 3?, located on the rod 29 between the central disk Q13 and the movable outer disks 22, 2st, serve to determine the normal closed positions of the latter disks`r and as a simple andconvenient means for movably holdingr said disks in such normal closed position I have located a coiled springr 34 on the rod )fl which expands between a head 35 on said rod and the disk Q2, as most clearlv shown in Fig. 10. This spring 34 also obviously operates to automatically vreturn the disks 24. to their closed positions after being moved to open or releasing positions by their described actuating devices.

A lmbbin-case and bohbiu are drawn to an enlarged scale in Figs. l2, lit and of the drawings. The bobbin-casc coinprises an annular rim 40 for peripherallv inelosing a bobbin 4l and havingl at one side thereof an integral inwardly-turned hohlJin-retaining flange and at its opposite side a movable b'ibbin-retaining,r flange 425, the latter beingl carried h v a latch 44 pivoted to the case rim at t5 wherebyv it may be moved from its bobbin retaining positioin as shown in Fig. 13, to permit of insertion or removal ot' a bobbin. The latch 44 is also formed with va reversely-inclined -or wedge-shaped outer face 46 which erates to engage the sides of the thread oop' carried around the'bobbin-case by the looper and guide the same'to opposite sides of the bobbln-case for aSSurin interlocking engagement of the threadoop with the bobbin-thread, in manner to be hereinafter fury) ther referred to. Located on the bobbin-ease adjacent to the latch 44 'and in posit-ion to be APartially covered thereby is a screwadju'sted bobbin-thread tension spring 48 under which the bobbin-thread 49 is adapt-,

ed to be passed through a slot 50 in the bobbin-case, and from which tension-spring the thread passes to the work through a guiding eye-piece 51 located on the bobbincase adjacent to thev end of said spring. A

'20 second eye-piece 52 on the bobbin-case provides a convenient form of stop for bearing against one o .f the bobbin-case-holder cross rods, as 'shown in Fig. 4, to hold the bobbinf case against rotary movement during the operation of the machine.

The modified form` of looper shown in Figs. 15 and 1G of the. drawings. is especially designed to'permit twoneedles to work more closely together'than is possible with 80 the looper'shown in the'precleling views.

This result is attained by ma ting the two guard arms of narrow wires 5"), which for the most partoverhe each other and thereby permit the .,,two adjacent yneedle'- 35 thread .loop-seizlng hooks {i4-54 to be brought more closely together. This tra'ction in width space occupiedV )yl the hooks and guards obviously permits two needles working between the hooks'and 40 guards to bearranged closer to each other for making two more narrowly spaced rows of stitches. Y

The successive .steps of the process of forming lock-stitches in the work by this improved mechanisn'i will now be described with more specialvreferem-e in Figs. 1 to 5 of the drawings. l ln Fig. 1 the needles 1L) are shown just entering the work 55 with their threads 47, and the looper guard arms "1.", are shown-with their inner or cam surfaces just engaging the bobbin-lhreads 49 which extend betweenthe lmbbin-cases and the work. As the loopers are now turned forward toward the. operator bv the shaft 1,

the two` guard arms carried therewith, by

drawing the engaged bobbin-threads Vto- \\'ard.'each other and into the-narrow slot therebetween, operate to pull sutlicient lengths of bobbin-thrcad from'thebobbins 60, for the-formation of the succeeding lockstitch. and also to carr the bobbin-threads laterally ont of thel paths of movement of the looper hooks 9.V This forward movement of the loopers and guard arms continues until the descending needles 'have are in position at "the opposite side of, the

needles to provide ample clearance for the presently to be formed thread-loops. From this position of the parts shown in Fig. 2, the needles begin to ascend and the loopers and Aguard-arms begin their rearward oscillatory movement, the ascending needles operating tothrow ont thread loops in the usual manner to be'seized by the looper hooks and the guard arm surfaces 19 operating to prsitivelv assure the formation or throwing out of said thread-loops at the proper side of the` needles to be enteredloy` the looper hooks. as show-n in Fig. 3. As'

the rearward movement of the loopers continue from the position yshown in Fig. 3 with the looper hooks just seizing the needle thread loops. the said hooks operate to draw the thread loops into the broad bightsv at.

. their heel or rear ends and thereby open or spread apart the sides ot the lools'preparatory to carrying them .in the continued movement of .the loopers into engagement wardlv'curred bends 1t of the looper arms' with the wedge-shaped faces 46 of the btbw A,

bin-eases. as shown in Fig. 4, by whichjWf" are positively guided tothe'oppgsite s'ille.

of the bobbin eases. Further continuance of the rearward oscillatory movement, of the loopers from the position shown in l"ign 4 carries the thread loops beyond the ver tical center lof the bobbin-cases and'casts tf the same, as shown in Fig. 5. at which time the. take-up mechanism operating above the bed-plate draws up the cast-,off loops into` interlocking engagement with the bobbinthreads and completes the formation of the lock-stitches in the usual manner. The modified looper shown in Figs. lili-and 1G ot the. drawings operates in substantially similar manner as regards-the pnllot`f of bobbin threads from the bobbin, the moving of these threads laterally out of the paths of. the loop seizing hooks. and the guiding ofA `the loops laterally outward atthe proper side of the needles to assure positive ehgagement of the needle thread loops b v thelooper hooks during formation of two more closely llt arranged parallel rows of stitches in the work.

Newly titled bohbins may be substituted for empty ones in .'-thel `fr )llowmg manner:

Finger pressure ontheactuating end of thel lever 1 7 will operate: the'lever to draw upon the reds Q( and move the bobbin holding disk .22v outward on the guide pins 21, and against't-he tension ofthe spring 34, as '1n' dieated by dotted lines lin Fig. 11 of the nii nemesi' `:Y

drawings, thus freeing the supported bobhin-case and allowing the same or another cese containing a filled bobbin to be quickly end easily inserted in position by the operator. When the lever 27 is released the Boring 34 at once slides the disk 22 inward again to hold the inserted bobbin-case between the two disks 253, 23. The push-device 30 will next be pushed inward to press the rod 29 rearward against the tension of the spring 34, thereby moving the inner diei-z Qi inward en the guide pine. 2l, :is indicated by the dotted lines in Fig. l0 of the Crawingrs, to allow removal of the inner hoiibinrese with its empty bobbiii and the insertion oi the same or another case with n filled bohbin. This being done and the plunger released, the spring 34 expands and restores the disk 24 to normal position to hold the inserted bobbin-case between the disks 2?, 24.

As before intimated, the herein described ioopers with their iiiiderhanging needlethread hiep-seizing hooks and the triplennction thread guards may operate substantially es set if the loopers be arranged to oscillate through a coni lete rotation instesid of having the ire erred oscillatory movement described. 1 iirtlierinore, the machine may be o erated to sew either one or two rows of stitching by the threading of either one or both needles, it beingl understood that each coperatin needle and looper operates in the formation of a stitch independently of the other coperating needle and looper.

iVhat I claim is:

1. In a sewing machine, a rotative looper having a curved arm extending in the direction of movement of the looper, seid arm having; an intermediate ortion arched ontwardly from the curved) plane of the arm and adapted for registration with a needle upon its initial forward movement to form a thread loop whereby the loop is bnl ed beneath the arched portion, said arin furt ier havin an underlying loop-seiziii hook the bill o which is located immediate y beneath said arched portion and adapted to enter the thread loop.

2. In a sewing machine, a rotative looper having an arm curved in the direction of movement of the looper and rovided with an intermediate ortion arc ed inwardly from tliecurved p une of the arm an adapted for location at one side of a needle as it moves upwardly to loop a thread, said arm also having,r an underlying loop-seizing hook the bill of which terminates immediately boneath said arched portion whereby-tochter the thread loop, and a guard arm lying'in the-curved pleneof the looper arm andboing spaced therefrom to reoe'zivev the-"end of 1 the-needie between the arms,said giierd arm haring the portion of its edge edgeicent the' needle during the upward movement of the needle lyin in a single vertical plane adapted to ear against the needie wh to direct said thread loop heneetii the e portion of the looper erin end into the of said loop-seizing hook.

3. in machine, the coinhine of a rotative looper hef iii the direction of more; it of the end provided with an iii'ideriying loog; ing; hook, a guard arm infant-ed iii the pinne of the looper arm and being speced slightiy therefrom to accommodate end oi; the needle between the eriiis, seid looper firm havinfT a portion thereof arched oiitwardty from t e curved plane of the looper erin :ind adapted to re iister with the needie upon its initial upwar movement to form the thread loop, said guard arm engaging at its inner edge throughout a portion of its length against the inner side of the needle w i ieby to direct the thread loop outwardly honest-h the arched ortion of the looper arm, end into the pnt i of said loopmeizing hook.

4. In a sewing inecliine, the coiiibinstioii with a reciprocating needie adapted to loop a threed, of a rotative looper having' an erin, and a guard arm on the leonor spaced roin the looper erin to eeeominednte a needle oetween the ernia, said looper erm having :in outwardiy biilged portion interinediete its ends adopted to register with the needle when the latter forms the thread loop, said iard arm engaging throughout a iortion oi its length against the inner si-r e of the needle opposite to the bulged portion of the looper erm and adapted to direct the thread loop outwardly beneath the bulgari portier of the looper arm, said looper arm ini having loop-seizing; heoii: returned tiener the arm and terminating immediately neath the bnlged portion for engageons@4 in the thresd loo i.

5. In e sewing machine, the conihinntion with the needle and the bohbin, of :i rotative looper having an arm carrying an underhangin loop-seizing hook and a guard, the latter eing operativo to project the loopu thread into osition for engagement by the loop-seizing ook and to engage the bobbinthreud and pull it from the bolibin.

6. In a sewing machine, the combination with the needle and the bobbin, of a rotative looper having an arm carrying an underhanging loop-seizing hook and a guard, the latter being operative to project the loopthread into iosition forengagement by the. loop-seizing ook and to engage the hoiihiiithread in advance of the looper hook and move it leterally from the path of the latter.

7. In a sewing machine, the conihinet-ioo Withvthe needle and the hobiiiii, o a rohr -tivenlooper having en erin cerrying an nir .dorhenging loopsoising hook and a gain-d,

eatively connected with the end disks to move them.

Q0. A duplex lmbbin-ease holder for sewinlgr machines, eom )ris-infrr a block or support` on the machine rai'ne, parallel pins sustained by said block. three disks or heads having means for holding two bobbin-eases between them and sustained on said pins, and means for moving the two end disks independently toward and from the relatively xed central disk.

21. A duplex bobbin-ease holder torsewing machines. Com )rising a block or support on the, machine rame, parallel ,pins sustained by said block, three disks or heads liming means for holding two bobbin-cases between them and sustained on said pins, spacing sleeves or means on one of the pins normally separating the three disks, and meansl for moving the two end disks independently toward and from the relatively tixed central disk.

22. A bobbin-ease, holder for two needle sewingmachines, comprising a block or supportv held to the machine frame, guide pins fixed to said block, a rodmovalrle endwise in the block, three bobbin-ease holding disks or walls on said Igfuide pins land rod, the eentral disk being fixed to the guide pins and the inner and outer disks beingr loose on said lf {uide pins. and the inner disk being fixed to the endwise movable rod; pins fixed to the outer disk and being movable, in the supporting block. spacing sleeves or means on the rod between the three disks, a springjr normall \Y expanding between ythe head of the rod and the outer disk, and means operative to independently move the inner disk supporting rod and the outer disk-carrying pins for moving the inner and outer disks respeetively.

23. A bobbin case holder for two needle sewing,r machines, comprising a block or support held to ,the machine frame, guide pins tixed to said block, a rod movable endwise in said block, three bobbiirease holdingar disks or heads on said guide pins and rod, the central disk being fixed to the guide pins and the inner and outer disks being loose on said guide pins, and the inner disk being fixed to the endwise movable rod; pins ixed to the outer disk and movable independently in the supporting block, spacing sleeves or means on the rod between the three disks, a spring;r normally expanding between the head of the rod and the outer disk, a lever fulcrumed on the block and Connected With the outer disk-carryi11g-pins to move. the

'outer disk, and a plunger fitted in the bloek and havinr a part engaging the inner diskholding-rod to move the inner disk.

24. In a sewing machine, the combination with a looper having an underhanging loopseizing hook, of a guard having' an end to engage the bobbin thread, withdraw thread from the bobbin for the formation of the next stitch, and remove said thread from the path ot' the needle and the needle loop-seizY ing hook, said guard also having a part to compel the needle thread loop to be thrown into the path of the needle-seizing loop.

Signed at Cleveland, in the county of Cuyahoga and State of Ohio this 17th day of August. A. l). 1906.

l'VILL'IAM A. MACK. 'itnesses:

ll". C. lVALiiint,

(lilas. (l. EnnoNs.

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