US1683689A - Wax-thread-sewing machine - Google Patents

Description

Sept. l1, 1928. 1,683,689

A. R. MoRRlLL wAx THREAD SEWING MACHINE Filed Dec. 5, 1917 5 Sheets-Sheet l zess jafenfor sept. 11, 192s. 1,683,689

A. R. MORRILL WAX THREAD SEWING MACHINE Filed Dec. 5, 1917 5 sheets-sheet 2 Sept. ll, 1928.

5 Sheets-Sheet 3 Filed Dec.5, 1917 lkizes @ux/WA4 sept. 11., 192s.

A. R. MORRILL WAX THREAD SEWING MACHINE Filed Deo. 5, 1917 5 Sheets-Sheet sept. 11, 1928. y1,683,689

A. R. MORRILL WAX THREAD SEWING MACHINE Filed Dec. 5; 1917' Y 5 sheets-sheet 5 Mess @www Patented Sept. l1,` 1928.

` UNITED s'rA'rEsr PATENT .oFFlcEp .ALFRED R. IVIORRILL, 0F SWAMPSCOTT, MASSACHUSETTS, ASSIGNOR TO UNITED SHQE MACHINERY CORPORATION, 0F PATIFR01\1QNEW'r JERSEY, A. CORPORATION 0F NEW JERSEY.

Application aleanecember 5, 1917. sensi No. 205,610.

vThe invention relates to wax thread sewing machines, and more particularly to lock stitchshoe sewing machines ot' the class usually employed in stitching the outsole to the welt o'fa welted shoe.

In operating machines of this class, the operator infremoving the shoe after the mach ine has heen stopped, draws oil a suiiicient length ot' thread to start the next seam, and cuts the threads close to the shoe. This requires the time and attention of the operator, thc-.s reducing the production of the machine, and it also involves a material wast-e of thread atthe beginning ot' each team.A It is the object of the present invention to eliminate this loss ot time and waste ot thread, thus increasingr the capacity ot the machine and decreasing the cost of production. To thisend the invention contemplates the'provision of means for severing the threads 'at the completion ot tliesewing, and "for holding themuntil after the com* pletion of the initial stitches at the beginning ot the succeedinmor shoe. the properV and uniform severing; ot the threads at the completion oteach shoe, and enables the seam to he .properly started on the succeeding; shoe without waste of thread. The thread severing and holding means are preferably actuated automatically upon stop ping the machine, thus avoiding additional manipulation or attention on the part ot the operator with its resulting loss of time. ln embodying the invention in an outsole stitcher provided with mechanism for stop 'ping` the machine at the completion of the sewing with its parts in a predetermined position, it is preferred to control the thread cutting and holding; means from the stop mechanism, thus ensuring the proper timing of these devices. l

ln. additionto the'ieatures outlined above, the invention includes certain 'further features oi'. construction and combinations ot parts which are hereinafterdescribed and.

set :th inthe claims. The various features ol the invention will he readily understoodV from an inspection ot the accompanying` drawir s and the `iollowing detailed description ol the mechanism illustrated therein,

ln the druwinVd tion showing` much of anoutsole stitcher This ensures Figure 1 is a front elevaasis necessary to illustrate the application of the Vpresent invention thereto; Fig. 2 isa plan view oit' the machine; Fig. 3 is a par? tial front elevation showing the thread cut-A ting; and holding devices and a partei their actuating; mechanism; Figs. 1, 5, 6 and 7 are views showing details of said actuating K mechanism; Fig. 8 is a detail side elevation showing;r the thread cutters and holders and their actuatingmechanism; Fig. 9.is a detail plan view of the devices for cutting,r and holding the needle thread; Fig. 10 is a similar sectional plan View; Fig. '11 isa sectional view through the thread cutter and holder `orvthe .locking thread; Fig. 12 is a sectional View on line V12, Fignll; Figs. 13 to 26 are ,detail views showing' the mode of operation of. the thread cutters and holders; and Fig'. 27 is a sectional elevation showing the manner in which the operation oi the threac cutters and holders is'controlled from the stop mechanism.

In the drawings the invention is shown as emhocicd in a lock stitch shoe sewing ma- E arm 6, a loop taker in theform ot a hook or" shuttlevmoun-ted in the. casing 8, a loop. spreader 10, a curved awl 12, a work supportV or table 14=,`apresser toot 16, a talreup 18, an auxiliary talreug Q0, and the usual co-operati ing' devices, all of ywhich are actuatedv and operated substantially as inthe machine of said patents.

ln embodying the preferred form Vof the present inventionin this machine, two thread cutters and holders are combined with the stitch forming devices to sever'-l the needle and locking lthread at the kcompletion of the sewing, and to hold the ends of the thread at the. beginning of the next seam untilthe first stitch has been formed and the threads anchored in the. worl Asshown, the devices toner-#ting andholding each thread are similar in construction and mode of o` era/tion. rlfhe cutter and holder for the needle This machine is provided withV a" nio thread comprises a rodv 22 provided at'iits l` foriv rd end with spring gripper fingers 24,v

and carried in a surrounding sleeve 26 which is mounted to reciprocate in a guideway 28 in the work support. The redis provided at its rear end with a radial projection 30 which passes through a slot in the sleeve and engages a slot 32 in the guideway. The ends of the slot 32 form stops for limiting the movement of the gripperl rodwith the sleeve in either directon, the continued movement of the sleeve after the gripper rod has'be'en arrested serving to close or open the gripper lingers. The end of the sleeve is provided with acutter blade 34 'forsevering the thread after it has been seized by the gripper lingers. The blade 34C is located at the upper side ofthe tubeand thus the thread is cut close to the shoe substantially in the plane of the work engaging surface of the Work support. As a result of this arrangement of the cutter together with the fact that the guideway for the sleeve 28 extends upwardly through the work support at an inclination to its upper surface a short or substantially no thread end is left projecting from the work. The cutter and .holder for the locking thread comprfses a similar rod 36 provided with the spring lingers 38, and

carried in asleeve el() which slides in a guideway forme/d in the bracket 42, the upper end of the rod being provided with the radial projection 44 playing in the slot 4G formed in the guiding bracket. The upper end of the guideway is closed by a cap 48 which forms a stop for engaging the end ot the gripper rod and limiting its upward movement. In this device the cutter blade V50 for severing the thread as it is grpped by the gripper` fingers is formed on one of the fingers ,38, instead of on the end of the sleeve 40. The guideway for the sleeve 40 extends downwardly and rearwardly towards thework and is so located that the line of movement of the sleeve crosses the locking thread close to the point at which the thread enters the work. The grippers and cutter are thus mounted to move bodily towards and from the upper surface of the work and when in retracted position do not interfere with the manipulation of work by the operator or obstruct his view.

During the sewing the thread gripper bars and the sleeves surrounding them are in retracted position, and the gripper fingers are open, `as indicated in Figs. 3 and 8 to l2.

"When the threads are to be severed and held at'the endofthesewing the sleeves are `advanced,'and by their trictional engagement with the gripper rods carrythe gripper 'fingers forward sov that'they pass on opposite sides and embrace the needle and locking threads, asindicated in Figs. 13 to 16. When the gripper fingers reach this position the advance movement of the gripper rods is arrested by the engagementV of their radial projections with the ends of the slots in which they play, and the continued forward movement of the sleeves closes the grippers and severs the threads close to the work, as indicated in Figs. 18 to 20. The sleeves are then partially retracted, carrying the gripper rods with them into the position indicated in Figs. `.21 and 22, or into the position indicated in Figs.

and 24;.` The parts remain in position until the beg'nning of the sewing, when they are moved into the position indicated in Figs. 23 and 24, if they were not moved into this position at the end ol the preceding seam. In this position the gripper' rods are retracted, and the gripper lingers are stilly closed by the sleeves. The parts remain in this posit'on until the end of the first stitch forming cycle, holding the ends ot the threads until the takeup has completed or nearly completed the setting of the stitch.

The rearward movement of the sleeves is then completed, during which movement they slide along the gripper rods and release the gripper lingers, so that the lingers return to normal open pos'tion and release the threads.

The means for advancing and retracting the sleeve 2G comprises a gear 52 engaging rack teeth. formed onthe sleeve and engaged by a gear segment 5st which is secured to the lower end of a rock shaft 5G. An arm 58 is secured to the upper end of the rock shaft, and is provided at its outer end with a slot GO engaged by a pin 62 projecting from the lower end of an arm Gel which is secured to a rock shaft GG. The slot G() so arranged` that oscillation oi the rock shaft 6b' and arm G-.l rocks the shaft 56 to advance and retract the sleeveQG. The parts are held in normal position by the spring G8 connected with the arm 6i (Fig. 8). The sleeve Jl() is advanced and retracted by a lever 7() sccurcd to the rock shaft G6 and provided at its outer end with a slot engaging a roll 72 which is mounted on a pin 74: projecting from the sleeve through a slot in its guiding bracket 42.

The mechanism for rocking the shaft GG to actuate the thread cutters and holders comprises a cani lever 7G mounted to turn freely on the shaft- GG and provided at its inner end with a'roll engaging a cani groove 78 formed in a disc secured to the cani shaft of the machine. The means for connecting the cam level' to the sha'lt G6 comprises a coupling bolt 8O mounted in the short arm of the lever, and arranged to engage a hole 82 formed in one arm of the lever 70 which is secured to the shaft. The coupling pin is normally held out of engagement with the Vhole 82 by a spring 8d, as indicated in Fig. 6.

lVhen the thread cutters and holders are to be actuated, Vthe coupling pin is forced forward and engages the hole 82, as indicated in Fig. 5. The pin is retained in this posi- Vthi-nid cutters and" holoef@ of the cam groove the'locking pin S6 mover tion by a locking boltwSG which passes with ahead adapted toengagc a recess S8 in the side of the pin. `The bolt is pressed tor- Ward by a flat spring 90. The bolt is disengaged Jfrom the pin by 'the engagement el its inner end with the cani disc when 'the end of the cam leverengagres the'loWest part of the cani groove 7153, as indicated in Figs. l and 8. Then thc'thread cutters andholders are to be actuated, "the coupling pin is pressed inwardagrainst the tension of 'the spring S4, and in the construction shown the means il r thus moving the pin comprises a spring' plate 92 arranged to engage the inclined end of the pin and carried on the lever 94u, which is automatically actuated upon stopping the machine to unlocx and litt the presser foot, preparatory to rei-nevel ei the Work. The means for act ating this levi controlled from the stop mechanism el a machine7 and since the'actnating ,in chanisin. for the thread cutters and holders is rendered active by the inovernentof this the proper timing of these devicesso that their action cannot pre the substantial completion of the last stitch orn'iing cycle is ensured. Willen the lever 9*-1 is swung; backward. just prior te the final stoppingl of tl e machine, the spring plate 92 presses against.

the end of the coupling pin 80 and presses it inward against the tension ot the spi-in' f1. Then the end ol" the lever the A part of the Caml groove 7 8" the pin registers with the hole in the liver 'T0 and enters thehole,y thas connecting the camlever with the rock shaft 0G eo that-the shaft `is rocked asthe ond'ofthe cam lei f r rides up the high part of the cani 78 to actnate Vthe thread holders and Vcutters to grip and cut `'the threads as above described. As the cani shaft cornes to ppingf; position the end et' ther can" lever rides part Way down the high part of the cani, or into the position `indicated at 96 in Fig. 8, thus retractingz 'lo 'the Dosi ion indicated in Figs. 21 A of the cara leve: moves out of 'thel-fnvpart forward into locking'position, as'indic ed in Fig. then the machine starred me end 'of vthe lever r'dcs into the concentric part of the cani groove: .PetracitingV the cri ters and. holders to the p1 on indi Figs. 23 and 24.3. locking bolt 86 rctainingi the coupling` pin in casan" est with the hole 82 aifter the lover Qlvhas nie-verl forward into the position which it occupies daring' the sewing". As the caro shaft completes its first revolution at the bi, e' ing of the sewing. the end oil the caforlev r nters the low part o the cam groove, '-thns fully re- Y V I tractiner the sleeves f ee thread 'cutters and lever,

1d 'l then the :end

cani disc, so that the bolt is disengagedv from the'couphnt;` pui. .The pin 1s innnedlately withdrawn from the hole 82 in the lever 70,

thus disconnecting' the cani lever from the rock shaft 06,'so that during' the continuation of the seivinglthe cani lever oscillates idly and the thread critters and holders remain in their retracted positions.

The mechanism Vfor automatically operating the lever 94- upon the stopping of 'the inachine is 'illustrated in higfl, and is fully shown and described in Patent No. 1,233,539 above referred to. rl`his niechanisln comprises a lever 98 vwhich is pivoted upon the hub oi a lever 100, so that it may swing laterally into and ont of the V.path of Aa Cain 102 on theV driving shaft orf the machine. The lever 100 is connected by a link 104;v With the upper end of a lever 106. The pivot pin vWhich connectslthe end of the linl; with the lever 10G projectsV laterally into position to engage a screw 108 carried by an arin 110 which is secured to one end or' ay rock shaft 112. An arm 114 secured to the other end oi'V the rock shartt has ts mp1' er end connected by a link 116l with the lever 9a. During` the sewing;` the lever 98 is heldoat oit the path oi the cani 102 by one arm of a 3-ar1n lever 11S which engages a screw carried in one arm ot the lever 9S.. Another arm-of the lever 118 is connected by link 120 with a locking bolt Awhich is mounted in the spring` pressed carrier slide 124. and is arranged to engage a socket in the end ol lthe cain lever 12o which controls the throwing` in and out of Vthe low speed clutch which iorins a part ot' 'the stoppingmechanism. The other arin oft the S-arm lever carries a roll 128 arranged to engaged by the end of a cani lever 1230 which is connected to the upper end of the treadle rod 132 through which the main driving clutch lever 1311 is operated to enga je and disengage the driving;` clutch 136. Daring the sewing the treadle depressed and the cam lever 130 acts through the 25- arm lever to hold the locking bolt oat of engagement with the cani leverl126 to hold the lever 98 octet the path -ol the earn 102. TWhen the treadle released at the Vcompletion of the sewing, he Cain lever 130 raisecl,fand the 3-arrn lever is released so taat tie locking;P holt is free to enter the socket in the camlevcr 1.26 when this lever is swung into such position 'that the socket registers with the pin. Vvhen the pinA snaps into the socketin the lever. the cani groove v: lich engages ,the other en d et the lever acts to ensg'agre the low sneed braking' and driving clutch at a medeteri'nincd point in the rota- Y tion of the driving; sha'ih'and then to disengag'e tee clutch at a predetermined point. 'l'he Upw rd i'novsnient of' the bolt in thus renrilcring the 'stopping' mechanism active also rocls the 3-arln lever 118 so that the izo lever and connections described to rock the' lever 94 and rendez' the thread cutting and holding devices active. Then the treadle is depressed` to start the machine, the lever 9S is swung laterall)y out of the path of the 'am 102, and the lever 9i moved forward to normal running position by the spring 13S. .i

vWhile it is preferred to emplo57 the speci lic construction and arrangement of parts shown and described in embodying the invention in the machine illustrated, it will he understood that-'this constructionand ai rangement is not essential to the broader features oit the invention, `but may be varied or modified as Vfound desirable or est suited to the construction and mode ot' operation ot' the machine in which it is to be embodied. It will also be understood that the invention is not confined in its application to a machine, in which the shoe is presented and the machine controlled by the operator, but may lso he embodied with advantagein automatic machines.

Having explained the nature and object ot thel invention, and specificallyy described one torni of mechanism in which it may be embodied, what is claimed is 1. A sewing ,machine having, in combination, stitch forming and work kfeeding devices including a hookneedle, a looper for laying a thread in the hook of the needle and locking thread mechanism, mechanism for actuating the same to sew a continuous seam, and means for severing and holding the needle and locking threads at the completion oi the seam.

2. A sewing machine having, in combination, stitch. forming and work feeding devices including a hook needle, a looper for laying a threadin the hook of the needle and locking thread mechanism, mechanism for actuating the same to sew a continuous seam, and thread severing and holding means arrangedto sever the needle thread and to hold it between thelooper and the work and to sever the locking thread and to hold it on the opposite side of vthe work.

3. A sewing machine having, in combination, stitch forming and work feeding devices including a hook needle, a looper for laying-a thread in the hook of the needle and locking thread mechanism, mechanism tor actuating the same to sew a continuous scam, and thread severing and holdingl means arranged to sever the needle thread between the looper and the work and to sever the locking thread and to hold it on the opposite side oi the work'.

-l. i". rcwinfT machine having, `in combination, stitch vtorming and work feeding devices including a hook needle, a looper for tion, stitch forming and work laying a thread in the hook of the needle :ind locking thread mechanism, mechanism for actuatingr the same to sew a continuous seam, and means for severing the needle and locking threads at the completion of the seam.

5. A sewing machine having, in combination, stitch forming and work feeding devices including a hook needle a looper for laying a thread in the hook of the needle and locking thread mechanism, mechanism for actuating the same to sew a continuous seam, and mechanism acting automatically upon stopping the machine to engage and hold the locking thread between the locking thread mechanism and the work.

G. A sewing machine having, in combination, stitch forming and work feeding devices including a hook needle, a looper for laying a thread in the hook of the needle and locking thread mechanism, mechanism for actuating the same t) sew a continuous seam, and mechanism acting automatically upon stopping the machine to engage and hold the needle and locking threads.

7. A sewing machine having, in combination, stitch forming and work feeding dcviecs including a hook needle, a looper for laying a thread in the hook of the needle and locking thread mechanism, thread cutters and holders for the needle and locking threads, normally inactive actuating means theretor,and means for rendering the actuating lmeans active upon stopping the machine.

8. A sewing machine having, in combina'- feeding de vices including a hook needle, a looper for laying a thread in the hook of the needle and locking thread mechanism, stop mechanism therefor, devices for cutting and holding the needle and locking threads, and actuating mechanism for said devices rendered active upon throwing in of the stop mechanism.

9. A sewing machine having, in combination, stitch forming and work eedingdevices including a hook needle, a loopertor laying a thread in the hook of the needle and locking thread mechanism, stop mechanism therefor, devices for cutting and holding the needle and locking threads, and actuating mechanism therefor controlled from the stop mechanism.

10. A sewing machine, having, in comhination, stitch forming mechanism including a hook needle and looper, a thread cutter and holder, actuating means therefor including an idly oscillating lever and a coupling pin for rendering the lever active to actuate the thread cutter and holder, and means :tor operating the coupling upon stopping the machine.

l1. A sewing machine, having, in combination, stitch forming mechanism including lUU lao

ajhook needle and looper, stop mechanism therefor including a locking bolt for rendering the stop, mechanism active, a thread cutter and holder, and actuating mechanism therefor controlled by the locking bolt.

i l2. A sewing machine, having, incombination, stitch forming mechanism and thread cutting and holding mechanism comprising a gripper rod provided with thread gripping fingers, a sleeve surrounding and frictionally engaging the rod, and means for reciprocating the sleeve and :tor limiting the movement oit the rod with the sleeve.

13( A Vsewing machine, having, in combination, stitch forming mechanismf and thread cutt'ng `and holding mechanisnrcomprisng a rod provided with springgi'ipper lingers, a sleeve surroun ling the rod, and iiirans 'tor advancing and i'etracting the sleeve and rod together and i1idependently.

l5. A sewinnv machine, having, in combi-Y nation, stitch forming mechanism and thread cutt ng and holding mechanism comprising a rod having spring gripper lingers, a sleeve surrounding the rod, means for relatvelyl reciprocating the sleeve and rod to close and open the gripper ingers, and a cutter blade on the Vsleeve for severing the thread.

1G. A lock stitch sewing machine, having, in combination, stitch forming mechanism comprising a curved hook needle, a looper and a loop taker, a work support, a thread cutter.' and holder arranged to cut and hold the thread passing from the looper 'through the needle opening in the work support, and a thread cutter and holder arranged to cut the locking thread.

i7. A lock stitch sewing machine having, in combination, stitch forming' and work feed ng devices including curved hook needle, a looperior laying a thread in the hook of the needle and a loop taker, mechanism i'or actuating the same to sew a continuous seam, a thread holder and cutter-arranged to cut and hold the thread passing troni the looper to the .tinal stitch of the sea-in, 'and aV thread cutter and holder arranged to cut the thread leading from the loop-taker` to the tinal stitch of the seam` y 18. A lock stitch sewing machine having, in combination,stitch forming mechanism icluding a curved hook needle, a looper forv layiiiga thread inthe hook ot the needle,

and a loop-taker, shoe supporting and guiding devices toi", presenting the outsole ot a shoe to the stitch forming mechanism, and

vends on' opposite sides of the work Acompletion ot the outseain. g

means for severing the threads at the completion ot the out-seam and tor holding theV ends ot the threads in proper relationto the stitch forming mechanism, tor the starting of the succeedng seam. v y

19. An outsole shoe sewing machine lhavin combination, shoe supporting and 5. i. ding dinf'ices,comprisingk a Work support and a presser 'foot arranged to receive between them the projecting edge of the sole of a lasted shoe, lock stitch sewing mechanism constructed and arranged to sew the outseamot the shoe, and means acting automatically to sever both threads atV complction ot thesewing. f

20, An outsole shoe sewing machine having, in combination, shoe supporting and guiding devicescompiising a work support and api-esser foot arranged to receive hetween them the projectingedge ofthesole i ot a lasted shoe, lock stitch sewing mechanism constructed and arranged to Sew `the outseam of the slice, and means for severing both threads and for "holding the severed at .the

2l. An outsole shoe sewing machine having, .in combination, shoe supporting and guiding devices comprising a work support and a presser toot arranged to receive between them the projecting edge of the sole of alasted shoe, lock stitch sewing mechanism constructed and arranged to sew the outseam ot the slice, and mechanism acting automatically upon stopping the machine to severV both threads. i l

2:2. An outsole shoe sewing machine having, in combination, shoe supporting and guiding devices comprising a work support and a presser vfoot varranged to receive between them the projecting edgeof the sole of a lasted shoe, lock stitch sewing mechanism constructed and arranged to sew the outseam of the shoe, and mechanism acting automatically upon stopping the machine to engage and hold the threads between the work and the stitching mechanism.

23. An outsole shoe sewing machine having, in combination, shoe supporting and guiding devices comprising a work support and a presser foot arranged to receive between tliein the projecting edge of the sole ioo of a lasted shoe, 'lock stitch sewing ineching, in combination slice supporting and 24. An outsole shoe sewingmachine, hav- ,125

guiding `devices comprising a work support i arranged to enter the rcrease between kthe sole and upper and engage one surface of the" proJecting edge of the sole of a lasted shoe and apresser foot arranged to engage the `opposite surface of the projecting edge of the sole, sewing mechanism constructed and arranged to sew the outseain of the completion of the sewing while the shoe is in position between the work support and presser foot.

Q5.An'outsole shoe sewing machine having, in combination, shoe supporting and guiding devices comprising a work support 'and a "presser foot arranged to receive between them the projecting edge of the sole lof a lasted shoe, sewingmechanism.constructed and ,arranged to sew the outseam of the shoe,a thread severing device mounted in the work support and arranged to sever the thread close to the work substantially in the plane of the work engaging surface of the work support, and means for actuating said device to sever the thread at the completion of the sewing while' the shoe is in position between the work support and presser foot.

26. An outsole shoe sewing machine having, in combination, shoe supporting and guiding devices comprising a Work support igeess and a presser foot arranged to receive between them the projecting edge of the sole of a lasted shoe, sewing mechanism constructed and arranged to sew the outseam of the shoe and a thread severing device mounted in the work support to move towards and from the work in a path inclined to the work engaging surface of the support and sever the thread substantially in the plane of the work engaging surface of the work support while the shoe is in position between the work support and presser foot.

27. An outsole shoe sewing machine having, in combination, shoe supporting and guiding devices comprising a work support and a )resser `foot arranged to receive between tiem the projecting edge of the sole of a lasted shoe, lockstitch sewing mech- :mism constructed and arranged to sew the outseam of the slice, and a thread severing device mounted to move bodily towards and from the surface of the work en aged by the presser foot and sever the loc ring thread close to the point at which it enters the work while the shoe is in position between the work support and presser root.`

ALFRED R. MORRILL

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