US1779079A - Shoemaking machine - Google Patents

Description

Oct. 212. 1930. A. `ABEL SHOBIAKING CHINE Filed Jui'. 21', 1927 Tf-111ml oa. 21, 1936.. l A

A Aar- L siiomxme MACHINEl Filed Jan. v21. 1927 2 sheets-sneu 2 inerng "quired *i* i i A This invention aims to Vrender such-maf' Y chines selfcontrolling andf to. therebyin-A ,z'crease their working speed and ,ei'ciencyw Patented Oct. 2li, 193:()r`

i *AUGUST ABEL o? LEZG; GERMANY; A ssieivon ,no uiHE EIRMffATiJAsWERKn -PHLER& C04, 0F LEIPZIG-SLOTTERITZ, GEEMANY y srroniiiiiirme MACHINE Alipiieation filed *.'ni'nusiryA 21, 192%,

` 'This inventioni'elates 'to machines for.

manufacturing 'boots and shoes and-finora;l

par,ticularly to that class of niaciiines in! whichtheslioe. or workpiece is lieldxby la 5 workman controliingtlieimachine operation so that the `various mechanisms thereof may in duesuccession and propertimes per- `form ltheir intended functions on the work-v piece. A typicalfexam'ple of this kind offslioemaking machineV is the hand-method,lasting inachine, embodyinga gripper foripulling the uppers over the flasts, a distributor :(or

supplying tacks of dierent sizes,V a ham-Y device for hammering fthe tacks f through the pulled-over Sportions ofl the.

upper intoV the last, a combined tack changeslide and nfiovzdole` work-rest, land a slitting n device, al1-:of which mechanisms are-'brought into operation by anattendantcontrolling hand or footmovement as re-f whereinfone form` ofiautomatio-drive and the saine by According totheinvention, the workman is relieved of strenuous hand and kvfoot opera` need merely hold and `guide the tions and while the lmachinewill 'automata workpiece,

Q ically bring itsvar'ious working-mechanisms into'play in proper 'sequence `and at the cor-v rect moments.

In carrying'outthe invention, ineanss'uch special oontroldisosare-provided to' cause an; intermittent. vfunctioning oi "the machine from a continuously vrotatingl drive shaft inV suoli manner-that'themachine wili vbe stopped andrestarted synchronously `witliqtlie work-v mans `progress in guiding 'the workpiece and lchar'iging its position. vThus, the times orl stages ofV automatic stopping-,of the machine are' inadejto correspond'lwith thel timefrequired for the-workman yto turn the -work- 4piece, sayffromone side to the other, a conipermit the wo rkman 'to steps kor workf'operations aremade to correparativ'ely `long stop Vbeingefected atA the conclusion of aconiplete operativecycle'to lay a'sideQtlie in- .ished workpiece and toy take upa newffone, Ywhile the duration" of periods of "successive serii no, 162,635,311@ in eermaiiiaiiuargf 21,: 192e,

spond with the eachfof suoli steps tliroughithe complete-cycle vof' operations. Accordingly a' working pevriod during .which seven tack-sare tobeap.-

pliedwill be longer 'thanjone in whichonly five tacks are .to lbev 'hammered vinto 1 place.

YIn. addition-to the above mentioned means, Vmeans sucligafs vcams, gears, `lever arrange.-

meiits and the likeV are provided tobring each of the variousworking mechanisms into playv at the `,proper time, provision: A also being inade forcountingLV andrecordingfthe number Y of workingfcyeles performed', fforincreasing vor decreasing thev working speed and for setting,all-Y autom-atie, driving andloontrolling ineansijnto inoperative relation',` the last-inen o g' tioned" provision being'd e`sirable,V for example, when particu-larlvdiifioult' work is to :bel

.carried out. i.

i Vv-iThe inventionfwilifbe best understood by',

reference lto the?accoinpai'iyingr drawings inventiongcertain parts; being shown in section;: v l ,Fig 2 isa diagrammatic representation of onel lform of means provided vfor, effecting `an intermittentautomaticvdrivepf the vina-.

chine;

Figs?) is aside elevation Y e of clutch ',forsaid maeliine'' y y trated for yeXamplepin application to a shoei `a vlasting ma#l i f Fig .4 lis -a rsection through ythe ohange l i ispeedi gearing, ltaken on the line lVe-IVof j liQue-12;, i

Fig. 5 is anelevation in iliustrationfofa vstructural detail;v and Y i manner hereinafter f described.

- 1, The inline-rai1r denotes thevv head-.piece of Fig, @.iiiustrates", Combined rk s has 4,been modifiedv according to'tliejv-inventi'on j l vso as-to'be;automatically: controlled in Vthe ier the machine which in its upper part carries a main shaft 2 from Which the various Work or step-bystep operations of the ma.- chine are initiated. Said shaft is driven intermittently by a pulley 3 through an intermittently engaging clutch mechanism, While said pulley is operable continuously by a belt (not shown) from the counter shaft 5, the lat-ter being journaled in the machine standard 1. The belt pulley 8 is loose on the shaft 2 but connected With a clutch member 6 and also continuously drives a bevel Wheel l' Which is in constant mesh With a like Wheel 9 carried on the vertical shaft 8.

Said shaft 8 is in turn adapted to drive a Worm Wheel 10 by means of a Worm 11, which latter is carried either on the lower extended end of the shaft 8, as shown in 1, or on the end of an auxiliary shaft 8a in which latter case said Wheel would be placed in line with the shaft 8 instead of the shaft 8, as shown in Fig. 2. This driveis prei erably effected as shown in Fig. Q'tlii'ough a change-speed gearing,` interposed between the aforesaid bevel Wheel 9 and 'the Worm 10, and this preferred drive Will be more particularly referred to hereinafter.

The Worin-Wheel lOdrives a cam shaft 12 upon Whichis keyed a control disc 13 for the control of the various Wollt-operations and intervals thereof. In the enample shown, this control disc 13-is constructed with radially disposed cani surfaces, each of which corresponds to governs the period of one Aparticular operation on the Worlrpiece or shoe.' In an operation for example, Where tacks are to be inserted through different parts of the shoe ti. e. the toe, left side, right side, etc), said cam surfaces Will accordingly regulate the enact number of tacks to be supplied during; the shaft operation period for hammerin l into the parts of a shoe into which they are respectively intended to go, the feed of the taclrs to position before the hammer taking place auto matically in the usual manner. rlhe depressions 14 in said disc 18 between adjacent-cam surfaces are of such extent as to regulate the desired intervals between successive or each two Work-operations, during which the Workman may turn or otherwise fre-irrange the workpiece or shoe for treatment Vupon another portion thereof. A longer depression lcausing a longer interval is provided in the disc at the point of endinr' complete rotation, during Which longe iterval the Workman may remove the finished shoe and take up another one for lilre treatment, by which time the first cam surfa e of the disc has moved to position effecting` automatic operation beginning on a new cycle.

The intermittent drive of the main sha-ft 2 for periods thus governed according,` to the steps or partid Working;- operations to be perfornied takes place `by the .following invent/e means: Mounted on the shaft 2 is shown a clutch member 16 having a bore open toward the belt pulley, in Which a spring-pressed clutch bolt or pin 17 is arranged. A 4guidepin 19 projects from the aforesaid bolt through a slot 18 in the clutch-member 16. Normally, the clutch connecting` bolt 17 en- With one of a series of holes 2G in the continuously rotating` loose clutch-member G and in this Way causes the shaft 2 to rotate also. In the intervals between successive or each tvvo partial Work-operations, and at the end of a complete Working cycle, the machinel is temporarily declutched.l This declutching,l is effected by the guide-pin 19 on the clutch bolt 17 being` engaged or tripped by the inclined surface portion 21 of a tripcam 22, which latter is moved into the path of said pin under control of the rotating cam 13. rlhe pin 19 thus tripped and forced to slide along said surface Will move the bolt 1'? against the action of its spring' and Withdraw the bolt from its hole in the member 6, thereby disconnecting the clutch members.

rihe manner of operating the trip-cam 22 with its inclined surface 21 'n relation to the pin 19 for clutching` or cou l 3g' and declutching or uncoupling the machine in a predeterrr'ned successen and with intervals of varying; duration Will be understood by reference to Fig. 2. The several aforementioned cam Yaces of the control disc 13 are therein designated A, E, C, D, E, and F. As said disc xatos, these cam surfaces respectively raise l lower a Working lever 23 having` an idling i roller bearing or resting upon the disc. 'l Working lever is pivoted at 24- to the 1 ie frame and is shown connected to the resaid clutch-operatino,` tr y-cam 22 by of a rod 25, While a spr t; 26 is shovvn ie; to hold the lever in co. tact With the control disc 13.

As hereinbefore stated, each of the 'cani lsurfaces of the disc 13 corresponds to one fticulfng Tartial operation of the machine, e length thereof respectively governing or 'egulating the number of tacks, stagriles or "1re be applied and han'nnered into the e i-piece. Assuming, for example that the cam surface A corresponds to that period in which the left sine of a shoe is to receive l corresponds to the period in which the side is also to receive in techs, the deln Figm2, said parts of the machineeare ind . .-'acycle oi disc revolution.

` Iand lcause the `bolt 17'V to be' retracted and ft-he first interval .depression 15 and'permit said 1irever'to drop Vunderv theaction ofthe spring 26, thereby pulling the rod down- '.Wardly and rmoving the trip-cam 221Withits yinclinedfsurace'portion-21 into thepath' or' f the pin 19on clutch-bolt 17, whereupon said f in 19 will" be pressed along the v`incline 21 withdrawn from engagement in the'fholve`20 offthe clutch member'.` Premature "release- .ment/of' the bolt 17 for re-engagement with" one of the` holes 20 `.is 4prevented by the pin 519 being pressed againstaprojection 27 of tripca1nf22 by which' it is held until thevtrip-camj 22 is againY swung with itsA inclined surfacev v'21 out of engagement therewith. This-*will Lfollow aiter `the p'roper. interval When theA roller-gon the'lever 23 rises overthe'next sucneeding-cam surfaceA to liftthe leverv 23 as the .disc y13. rotates., '30' .'19 is .instantly released 'member "6,7fthus; causing the first :partial operationxto begingandltakeplace.- c Theaioredescribed lockingrposition o'fthey trip-cam 22'with'the pin. 19is represented in:A

At this moment the" pin andthe bolt .17 Awill vfreely enter one of the` holes20 intheclutch vor next dotted 'lines in Fig.' 2.

i A29'of anindicating y u .V ,t28 carried on its-=free"end.v lSaidratchet wheel .a coupling and 'r ,Yhile the lever 23 is actuatedrby'. the c01l-` trol=dise13 forthe main purpose-of effecting uncoupling of the :ma-in shaft 2in the manner described, itinay advantageously be usedfalso i deviceb'y`means of a pawl is'shown connectV dto the s haftf30-of an'indiis* arranged 'isuch1 operation,

catorldisc and is inovevd'clockwise by the pa-wl 28to the .extent of `on`e"' tooth'upon each drop-j movement of`t he-lever.23.jv The indica-tor'disc withinpa teasing 31Y khaving an vopening p 32. throughl which 1 the progress v-o .tlie 'worlroffthe machine vkmay begindicated. u

The advance Eof'the Vindicator disc tothe ex- ;tentfol one tooth of the ratchet *wheel 29 as "describetl, isettectedatthe endofeach partial operationjin preference to the ,beginning `of y,

l sotliat the intervals betweenwillialways indicative of the spartialgoper- A ,ation nextto follow.

Said indicator may z idi'sc, thuskeepingaccuraterecord lof the gross u, "outputof themachineglsince :theratchet'wheel 2,9makesone "revolution-,with every complete cycle' revolutionv ofthe .control disc .113; Y

to completiony of Y as hereinafter described,; the various partial toV actuatef ai ratchet wheel.V

be connected .Witha ltotal revolutionf mechanism and indicator 33 olany--lrnowntypeforregisteringthetotal `p j f ,u numberofirevolutionsmade'fby-theindicator 'j Then 'working-1 on. thetoe .ofa Js hoeiit1-is customary. to slit-the leather of the uppe-rby .2 means ofthe knives 5'1 `vvhilepullingthe upi per over-thelastv lso gasto prevent bulging, to ,i :which end saidknivejs aremovedinto andouty ffii; c f

While the described arrangement of :tuncvtioni-ng'pa'rts produces lan automatic inter. mitteilt drive for rtheV machine, it is nevertheless possible to throw such lparts out'oi operative relation and employ only theinain drive ,i

operations Yol! themachinebeing then controlled as heretofore by the hand or foot. The

niannerin which'this may be eected'willbe 'described hereinafter; Such Way ofwforking -inaybe-desirable in somecases `where Apartie-v; ul'arly delicate or i andthe workman must proceed with greatervv diflicult work is to be. done,

deliberationfand' care than would vbef permis- A sibley with` the automatic control ofthe ina-fv chine-.f` f

p y In .the illustrative machine ofFig. ,1, *the j ',work-rest'34 and thet'acklslide 35 areconvnected-vsolth'atthe operation of onegwill cause simultaneous actuation ofthe other asshown i f vmore `clearly vinthe',A detailed vviewof Fgig; 6.l .1 The tack-,slide 35 is'p'r'ovided" 'with-.earshort rack 92 .Whichis inengagement with :litoothed` i segment 93 `,adapted tofturn'with its zpin`94 and, by' means of'a lever 95 andylink 96, to

movel either of the tack l'supply-'channels 41 l.

4and 42 into Working position With respect f to thejtack-slide 35. This arrangement is known, but. according fto .the invention the hand controlusually .employedis replaced by an automatic arrangement. YSaidslidewv35 is provided at its lowerl side with aglug'having aneyethrough which afpin 36 isextended to fengageone endofabar37..,'-Theotherend f ,Y

of said lbari connected.toialinkf39f.havingfa vfief) cam roller 38 lguivdejdnin the-'groove of a2 cam-1 40 on thefshaft'12 by which the saidilink is given la p'artiaLsWingi-ngmovement. By

vvmeans l of this arrangementgthe connected Y slide'35 and workrestg34 (Fig.v 6)V are moved -105 I l to andirom the cam 40 i`n such .manner that p,

accordingto the requirements-,of fwork, tacks of the correct size arealways edto theham'- mer device, suchY tacksfbeing-.passed'through AWork-rest 34" takes a; position cam acts upon a pivotedjlink 46 #having a cam roller guided i'n itsfgroove,the said' link c being connected'fthrough-a rod 47jwitha lever 48 having,actuating"connection-With a twist- 'Tfn-'20 er-sl'eeve 49 slidable Vin ythe usual Ymanner on the Vshaft of afcoupling ori/.mechanism 50;

for turning vor swinging thefgripperi at the'proper moment into rcorrect position fer" laiting the-upper;- f

cent the disc 13.

of operative position by means of a link and lever arrano'ement 53 which is controlled from the shaft 54;. ln prior art practice, said shaft has been turned by hand, but according to this invention, it is turned automatically at the proper moment under the control of a cam 55 arranged on the shaft l2 adja- In this instance, the cam 55 is shown integral with the disc 13, but it may be a separate member if so desired. Said cani acts upon a bell-crank lever 57 which is pivoted at 56 and carries a projecting stud guided in a groove of the cam (see Fig. 2). The action of the camon said 1ever is snch as to cause the latter to work whenever the toe or heel portion of a shoe comes around to place, because it is at this moment that the cutting device should be set in operation. lVhen the toe or heel portion of the shoe has been provided withvthe correct number of tacks, the cuttiifig device becomes inoperative again by the action of the same cam 55. This operation has heretofore been manually controlled by means of a handle 58 on the shaft 59.

The aforesaid bell-crank lever 57 is provided with a toothed segment 6() on its free end adapted to engage with a pinion 6l. rl`he comparatively short stroke of this segment is augmented to the extent required in turning the shaft 59 by means of intermediate gears 62 and 62a. The last gear in the train imparts partial rotation to a bevel-gear 63 which communicates a like movement to the bevel gears 65 and 66 on a shaft 64. rlhe gear 66 meshes with another bevel gear 67 on the shaft 59 which controls the cuttin device, so that whenever the toothed segment 57 is actuated,the shaft 59 is rocked and thereby renders the cutting device operative or inoperative as required.

The bevel gear 66 is mounted on the shaft 64 in contact with an underlying bushing 68 having threaded engagement with the bracket 69 permitting it to be screwed up and down therein. f If it is desired to dispense wi h the automatic actuation of the. shaft 59 and to move the shifting device manually into operation by the lever 58, the bushing 68 is screwed down and the gear 66 will drop with said bushing so as` to disengageV it'from the gear 67. The shaft 59 is then free to be turned by hand as required.

Different kinds or sizes of boots and shoes require the supply of different numbers of tacks in each of the partial working operations. According to the invention, the number of tacks supplied during the cycle period therefor may be changed by substituting cams of different surface extents for the controlling cams 13 and 55 or others, care being taken that the length of the intervals between the various partial operations remain the same as before, since these intervals rei resent the amount of time required by the workman for handling the work during such intervals. The time between successive strokes of the hammer being constant, it is permissible to alter only the times during which the various partial operations are to be carried out. ln other words, each particular partial operation becomes longer or shorter depending upon the number of tacks to be used, while the intervals between such operations remain the same.

As the speed of the main-shaft .2 remains constant, the invention provides an arrangement of variable speed gearing 70 between said shaft and the control shaft l2 as hereinbefore mentioned, in order to avoid the necessity of exchanging the various bevel or worm gears effecting the automatic drive as would otherwise be the case whenever it is intended to vary the working speed of the machine. in the example shown in 2, three different speeds are represented by the gears 7l, 72 and 7 3 arranged on and rotating with the vertical shaft 8, any one of which gears may be brought into mesh with a gear 76 on shaft 8? 4l) by means of an intermediate pinion 7 5 on the end of an arm 7 5. rlChe said pinion is in constant engagement with the gear 76 and adapted to be swung in and out of engagement with said gears and also raised and lowered by a hand-lever 74: extending through an opening 70 in the gear box 70. A spring-controlled lock-pin 77 is provided to hold said hand-lever in the desired position (see Fig. 1l), the said pin thereby entering into recesses 77 adjacent the opening 70. lf the hand-lever 74 is mov-ed to the position indicated by dotted lines in Fig. el., the pinion 75 will be thrown ont of engagement with any of the gears 7l,

72 and 73 and thus break the driving conf nection between the two shafts 8 and 8a, so that the shaft l2 will no longer be rotated. Thus, when it is desired to vary the working speed of the machine, by taking the drive through the gear 72 instead of 7l, for eX- ample, as shown in Fig. 2, the lever 71h is first swung into the Vdotted line position of l? ig. 4L, thereby swinging the pinion 7 5 out of engagement with the wheel 7l, whereupon the lever is lifted with the gear 76 and swung backward again to full line position with its pinion 75 now engaging with the gear 72, where it is locked with its pin 77 in one of the recesses 77. However, when the automatic drive is to be disconnected altogether, the hand lever 74 need only be swung out to the dotted line position shown in Fig. a.

The autor iatic drive of the machine being thns interrupted, it may then be controlled by hand, which in some instances may be desirable as hereinbefore stated, especially when difficult or delicate work on the shoe is to be done. The control shaft l2 being brought to rest, the main shaft 2 will continue to rotate andactuate thelvarious working mechanisms ofthe machine in the usual manner.y I-Iowever, disconnection ofthe automatic control shaft 12 calls'for' a disconnection also of the subsidiary ,controlling devices which are. `then replaced by the usual `hand or foot con trolling levers.

the gripper 43 for example,

These alterations maybe effected in agvery For manual actuation ,of

there would be simple .mannen required only. a lever v7 9 connectedwith the lever 48 and a bar SOfconnecting thev first being represented in broken lines in ig l.

The bar 47, in this case, must ofcourse be disconnected from thelever 48 and removed. so as not to interfere with the treadle operation.L In said figure also, atrigger-shaped lever 83 is shown for the manualactuation of the work-restv 3 4. I In this case the removal y of the bar 37 becomes necessary.

In order to keep the two parts k6 and 216 of the clutch in engagement .after the control shaft 12 `has been disconnected by moving' the hand-lever 7 4 to the. dotted line position indicated in Fig. 4, the control-leverk 23 may be connected to a bellcr'ank lever arrangement 84v represented. in @dotted lines in 2, said lever being pressed upwards by meansl ofa hand yor foot leverfnot shown) .so that the clutch may be operated as desiredg. As

manual roperation of the lever 23 may be obstructed lby reason of its roll-er resting upon one of the canisurfaces of Athe discl, the connecting rod 25 is shown made in two parts connected by a .turn-buckle85 ypermittinga Y shortening of the rod to. raisev'said` lever outv of contact with said disc.

VA. machine embodying the features of the invention herein described and claimed mayl be run according to' either of thev following f the invention shall `berestricted ltot the-examinodes of operation; viz:

1st. Automatic drive ofthefinachinevvith -automatic control ofthe partial'work operations. f

2nd. Automatic drive of the,` machine with K' manual control of the partial-work opera? tions, such as shown inFig. l to be governed by the cams 40, 44 and '55.

3rd. Manual controlled driveof thema chine with'manual controla'lso o f the `partial work operations bydisconnecting shaft l2 from the main shaft 2 kand usingy the machine like any ordinary `hand`method lastingmachine. f A

Since the lengthl of Vthe cam .sur-faces on the control disc. 13 4govern the rnumberl of tacks supplied andinserted during each of the partialV Work operations on ashoe, and as. these surfacesmust .be made different for every desired variation in the numberof tacks supplied, the .invention provides `an, arrangement by which suchvariations vmay be effected quickly andl Ewithout. i'iecessitating a dismantling of the control-lingelementsand` Y 1o be formed in twopartsembodying a baseor y carrier plate; portion iwhichmis fixableto thefactuatingy shaft,` and separable portions or seeirients` 87and 88V which are formed with. Y

proper-lygrelatedf camv surfaces thereon, adaptedfto be fastened, onto said# baseY or carlyrierplate means ofiscrevvsV 891er other-V;

Wise. 'VVhenz'control cams suchas onftheldiscr `13 are to be exchanged oraltered, is neces;`

saryv merely -to detach the segments y87 Sandl 'tov replace them withy other segments vhaving the desired cam surfaces.V Thiscanbedone without. a prolonged interruption of lwork. In Fig. 2 ,ther cam disc 13 is shown formedin a slightly different Way, the tvvol cam seg-. ments Tin this instancebeing applied, to-,thej side ofthe `carrier-plate rather thank to its.

periphery.. i

intended to1 provide an automatic'intermittent .operation of a shoemachine at al; speed Whichis set by ,the :machine itself, yfor govf erned periods according `to the time required work to Ibeperformed'andalso to providefor ymanual operations by an attendantonioc- Itis to be understoodlthat the inventionis j for the lseveral partial steps or operations of or delicatework requiringmoreY orparticulary f measured or timed t steps,` but requiresV ak certainamount of deliberation on the partof the operator,-as Vmay .be the case for instance with particularly heavy footwear `or when using yespecially' tough ory hard .ma'terials. Y Wit-hi this purpose in view, it isnotintendedthat tively ,actuating the working fmechanisms Le."

thereof, fa clutch member, on said; vWorking shaft, arotating control shaft continuously 'c are,4 or-When thenature; of the work does vLoo not permitof its-being performed indefinitely 1 lill) operated by; said'V clutch meinben;k au control disk lon said controlvv shaft, means arranged between said control disk` and-,said'cl'iitch' member for Y-automsitically andintermittent- 1y engagingQthe clutch tocause rotation Aof.y the working shaft so; as .to perform ,ai plurality of successive partial oper'ationsgoniashoezduring eachv rotation of the ycontrol fdisk, Vand auxiliary control disks on said control shaft dividual working mechanisms of the machine to be moved into and out of working positions in consonance with the work being per-Y formed. y 2. In a shoe-making machine having a Working shaft for actuating the working mechanisms thereof, a clutch-member on said working shaft, a rotating control shaft operable continuously from said clutch-member, a control disk on said control shaft having a cam surface with a plurality of spaced raised portions .of variable extents, means operable by said disk for automatically and intermittently engaging the clutch to cause rotation of the working shaft to perform a plurality of successive partial operations on a shoe during each rotation of the control disk, means for supplying tacks for insertion in the shoe under treatment comprising` in combination a movable tack-slide having two channels for the supply of different sized tacks, a cam on the control shaft for controlling the movement of said tack-slide to bring either of its channels into working position, and a link and lever arrangement between'said cam and said slide actuated by said cam, which latter serves to admit for insertion in the shoe the correct number of tacks according to the extents of the raised portions of the cam surface of said disk and the correct size of tacks according to the position to Which said slide is shifted by said cam. 3. In a shoe-making machine having ya working shaft for actuating` the working mechanisms thereof, means automatically effectinfr intermittent operation of the machine accort ing to successive stages of Work to be performed on the shoe, comp 1ising in combination a rotatably driven member loosely mounted on said working shaft, a clutch element keyed to said shaft and releasably engagable with said member, a control shaft continuously rotated by the driven member and having associated means for changing the speed of the shaft, a disk on said control shaft having a cam surface with a plurality of spaced raised portions of variable extents, means operable by said disk for engaging the clutch With said driven member at predetermined intervals in a cycle of the control shafts rotation so as to cause intermittent rotation of the Working shaft in a plurality of successive Work operations of predetermined duration depending upon the eXtents of the raised portions of the cam surface of said disk, a turnable gripper for gripping and pulling or plaiting the shoe upper, a cam on the control shaft, and associated link and lever arrangement operable by said cam for automatically turning and swinging the gripper into position for operating on the shoe under treatment.

4. In a shoe-making machine having a working shaft for actuating the working mechanisms thereof, a clutch-member on said Working shaft, a rotating control shaft operable continuously froin said clutch-member, a control disk on said control shafthaving a cam surface with a plurality of spaced raised portions of va 1iable extents, `means operable by said disk for automatically and intermittently engaging the clutch to cause rotation of the working shaft so as to perform a plurality of successive Work operations of predetermined duration depending upon the extents of the raised portions of the cam surfaces of said disk during each rotation of the latter, a slitting device for working on the toes and heels of shoes to be lasted, a cam on the control shaft and means operable by said cam for automatically moving the slitting device into operative position at the moment and intervals.

5. In a shoe-making machine having a working shaft for actuating the working mechanisms thereof, a driven clutch-member on said shaft, a rotating control shaft continuously operated from said clutch-member variable speed, a control disk on trol shaft, means arranged. between said control disk and said clutch-member for automatically and intermittently engaging the clutch to impart rotation to the working shaft so to perform a plurality of successive partial operations on a shoe during each rotative cycle of the control disk, a slitting device, a shaft for moving said slitting device into operative position, a cam on the control shaft, a bell-crank lever having one arm connected with said cam and its other arm provided with a toothed segment, a bevel Wheel rocked by said segment, and a gear arrangement between said bevel gear and said shaft of the slitting device for actuating the same to move said device into position at the proper moments,

6. In a shoe-making machine having a working shaft for actuating the working mechanisms thereof, a driven clutch-member on said shaft, a rotating control shaft continuously operated from said clutch-ineinber at variable speed, a control disk on said control shaft having a cam surface with a plurality of spaced raised portions of variable extents, means operable by the cam surface of said disk for automatically and intermittently engaging the clutch to .impart rotation to the working shaft so as to perform a plurality of successive work operations of predetermined duration depending upon the extents of the raised portions of the cam surface of said disk in a cycle of the latters rotation, a slitting device, a shaft for moving said slitting device into operative position, a cam on the control shaft adapted to determine the time of functioning of the slitting device, a bell-crank lever moved by said cam and provided with a toothed segment,

' follows its movement to move iii and out of and a gear y'arrangement between said seg-l ment and said shaft of the slitting device7 including a shaft-and bevel wheeland bushing having an external thread adapted tok be screwed up and down in its bearing and to support they `bevel wheel so that the latter engagement with its coacting bevel wheel;

` 7. In combination with a shoe-inakiiiggmachine having a working shaft and a powerdriven shaft7 means for automatically and intermittently n driving the machine; said means comprising a driven element loosely Vmounted on said working shaft and continuously driven byr said -powedriven shaft,

clutch means releasably engageable witlrsaid driven elementto cause the latter to rotate said working shaft, a control shaft,imeans including transmission `and change-speed 20' gears arranged between said driven element and said control shaft for continuously im parting rotation from the former tothe latter at dierent speeds according to work requirements, means-including a cam element on the control shaft operating a trip-cam member on the clutch means through la vCam-operated member and a link connection for intermit- A tently engaging said clutch with saiddriven element to effect a plurality of partial work operations lof the machine in afsingle cycle of control shaft rotation for periods-successively determined by the form `of camys'urf face of the aforesaid cam element, and means f operated by said cam-operated member for' operating a device indicating the successivev work operations of the machine.

In testimony whereof I afliX my signature.

AUGUST ABEL.

Images