US2326726A - Shoe sewing machine - Google Patents

Description

Aug- 10, 1943- B. T. LEVEQUE v 2,326,726

S-HOE SEWING MACHINE Filed Aug. 17, 1940 5 Sheets-Sheet 1 Fig. i

5, i 44? 2.9% 260 'l l I: o 2 6' afs "1' 267 f Me7 .y '50 ff' g" H 255 //7 /6 K 3/6 353/4( 60 226 y 5 0 256 /70 /54/ 254 35 /019 266 25a -5/2 I ya ,410 J 7:2 0 /aa WL' ness Aug. 10, 1943. B. T. LEVEQUE 2,326,726

SHOE SEWING' MACHINE y Filed Aug. 17, 1940 5 Sheets-Sheet` 2 Witnes Aug. 10, 1943. B. T. LEvEQuE 2,326,726

SHOE SEWING MACHINE Filed Aug. 17, 1940 5 Sheets-Sheet 3 Aug. l0, 1943. B. T. LEVEQUE 2,326,726

4-SHOE SEWING MACHINE Filed Aug. 17, 1940 5 Sheets-Sheet 4 1 Y Fig. /2

nyentoo Aug 10, 1943- B. T. LEVEQUE 2,326,725

sHoE SEWING MACHINE Filed Aug; 17, 1940 5 Sheets-sheet 5 C) Fly. /4 Fg/ certain respects to the machine-disclosed v present inventorsr prior- Patent No.- 2,144,766 of January 24, i939, and in therein referred-to patents issued on divisional applications leased .on -said patent.

enemies Aeg. io, ieee Y United Shoe: Machinery. Corporation,

Y aard Levegue, i/Venhalm,liiass., assigner to Borough Flemington, N. 5.,' a corporation-oi New t crsey [applicatie-n The present invention relates primarily to shoe sewing machines, and is herein disclosed asemliodied in a curved vhook nee-iln lockstitch shoe sewing machine adapted to sew the outsole to the welt and-upper of a welted shoe, the illustrated.

embodiment of the invention being similar in in the The present invention has as an object the provision' in ari-outsole shoe sewing machine of new improv-ea mechanisms capable of actuating thefvarious parts in 'the desired manner' at high speed, and which will nevertheless permit the parts-to be brought to rest, von stoppingthe machine, quickly and in proper position without damaging shock or jar. i

Another object of the invention is to provide, for-use in machines of the above type, improved mechanisms for controlling the machine whereby the operator may, by vmeans of a-single control member, start and stop the machine and likewise control the speed of operation thereof.'

i/'ith'these'obiects in view, a feature ofthe presentinvention contemplates the provision in an outsole shoe sewing machine having a main v.sewing shaft inthe form of a multi-throw crankmit; means for disconnecting the sewing shaft 'its-driver, a plurality of separate mechanisms for actuating the stitch forming-and work handling devicesv from-'the sewing shaft, each of the' mechanismsVV being actuated from a crank s of the multi-throw crankshaft, and means for Vdisconnecting the actuated devi/esu from the sewing s'raft while permitting continued rotation cf the shaft comprising Va control member for moving tions hetwee the sewing shaft and thefactuated devices, and means for actuating the control inenicer. 'Each of these trains of mechanism 'Y inc`l idee a lever provided with a earn slotwithin w h is received a followenone of said elements of-*ig reciprocated relative `to the other by a crank of the sewing shaft to hnpart to tieactuated member a characteristic movement deterled by the particular configuration of the cam such arrangement making possible easily` driven, smooth running mechanisms capable ofY high speed operation while permitting stopping of the machine Without injurious shock or jar.A

In' accordancewith another feature of the 'invention, these tr ins of. mechanisms include .elements adapted to'be disconnectedtofdisconthe individual elements of the'Y connecthe crankshaft has comexto'rest; Fig. 2*,is a detail view ini right/side elevation Vof the vtrain of assess i7, iste, sensi ne. assess ic ciaims. c.. infect) neet the various actuated: devices from their actuating members so ythat, upon stoppingthe Vmachine, the yvarious stitch forming and work f handling 'devices maybe brought to rest lndependentlyof the crank shaft, the connection and 'disconnection of these elements being effected by undergthe control of the operator, said means likewise being arranged to control a twospeed driving mechanism by' which the vmachine may be operated at .high orfat low speed, asdelsired.

yAn outsole shoe sewing machine embodying the kseveral features ofthe invention :isillus- Y Y trated in the accompanying drawings, inv which Fig.' 'l isY .View in. right-hand side elevation, Lurrtly'inl sectionfo the head of ithe machine, showing a portion of the .two-speeddriving mechanism and certain ofr the actuating' mechanisms for 'the istitch forming and workhandling devices, illustrating'.particularly the )train of mechanism for actuating the take-up, the partsr being shown after the disconnection of theA disconnectible elements of said' trainI and before Vmechanism for vactuating lthe needle, likewise illustrating theparts at theinstant of disconnection ofthe disconnectible link;` Fig.' 3 is a detail sectional View, on an enlarged scale, taken on the line S-cf-E'ig'. 2, showing the arrange- -inent of cam leverand cam roll orV follower in i th'e'cam slot of said lever.; Fig. 4 is a. front View,

partlyin section, 'showingthe crank shaft 'and the lcweriendsni the'connecting rods orilinks 'of the individuali 'actuatingV mechanisms 4for vthev various stitch forming and work'feeding devices; Figs'j-S vto 1G, inclusive, are views taken on' the section lines t-ac-e, 1 1, .c s, .L3- aand 'iii-' iii', respectively, 'ci Fig. 4,' showing the var- =icus angular: positions "of the' diiferent crank throws in order-to operatethe variousfdevices'in proper timedv relation, the'crankshaft being substantially in its 'position at the instantrof disconnectionv of the disconnectibiev 'elements Vof the several'trai'ns ofmecha'nismsfas in-Fig's. 1 and 2, 5 showing the crank for the takeup,'rli'ig.

'5 the crankfor the work feed, Fig. '7 the crank for thevneedle, thread'hooln' and presser foot lock, Fig. 8' the crank" for the awl, Fig.v 9 the crank for` the shuttle and Fig.` 10 vthe crank for the .loe-per; Fig. ll-is a View in rear elevation-of a pcrticnof the'headoffthe machine-showing certain ofthe actuating connections of the'starting lstopping andspeed Vcontrolling mechafnisim; Fig. l2 is a detail view left-handside i fielen@ |2-I2 of Fig. 11, illustrating on a somewhat ylarger scale the two-speed driving mechanism shown in Fig. 1; Fig. 13 is a detail sectional view of the double-coned clutch member of the driving mechanism, taken on the line l3--l3 of Fig.

12; Fig.r1 4 is adetail vieW'in right side elevation,

partly infsjection, of the take-upgmechanism ofV the machine, showing the thread 'measuring mechanism and the thread clamp, the take-up arms being shown in extended position for set. ting the stitch; Fig. 15 is a View in front eleva- Y tion, partly in section, of the parts shown in Fig.

14, and taken on the line .l5-4550i that `figure;

and Fig. 16 is a view takensimilar toLFig. libut n :spreader'rSZ :and zrotary .shuttle 'These .parts .are substantially similar in arrangement kand mode .of :operation :to :those .of 'the .machine disclosed in -fthe present inventors v,prior .*P'atent No.

:2151431366 vabove ,referredxlto :and :in Ithe :patents issued on .divisional .applications based thereon.

In order for the various sewing and Workhan- Ydling devices .tovwithstan'd the .repeated shocks and strainsofthe stitching .operation when Ithe machine Pls :operated .at -.high speed, :the parts imustbe.stronglyl constructed, with :the result .that 5I. @they are of necessity'relatively ,'large Aand heavy( To actuate -zthesefparts in i proper timed relation, imparting .to eachdevice 'the:desired characteristic movement, .in Ycertain 4cases involving a :rapid .acceleration and ,deceleration in .but a ,fraction :i

elevation, partly in section, and taken on the line l sirable characteristics of applicants patented machine but free from the objectionable features incident to the use of cam operated mechanisms.

The main shaft of the illustrated machine, as best shown in Fig. 4, consists of a crank shaft 36 Nprovided with a plurality of throws or cranks,

-each of Which,by suitable connections, actuates 'a' separate'train of mechanism for driving the stitch forming or work handling device connected thereto. The individual cranks of the crank 'Shaft 35 are connected to their various stitch vforming and work handling devices through meolian'isnis which convert the simple crank mo- -tions into vcomplex movements best adapted for actuating each device according the characteristic motion desired. This is accomplished in the `present invention by the provision of members .ofa .stitch forming cycle, .fnecessar-i'iy .requires l actuating mechanisms :that rare 'in ,themselves .strong and fdurable. .a consequence, :the

proper actuation `of ithe vparts :at high -speed, :and

.thestopp'mg of :the :machine :quickly without un- -workhandlingrdevices in prooerzposition topermit removal .of ithe work, .represent `serious .prob- 4levas.

In :the ,unashirre of applicaritls ,prior :patent ,alcove 1eferredfto, the :desiredresults are sought to be accomplished by actuating the principal :thread .manipulating .and work feeding devices :from the cam shaft through separate trains of mechanism, .and by :providing .in these .trains of mechanism, elements adapted tto -be disconnected, lwhereby the principal operating devices .of the `Inacl'iine Canlbe brought .to ,rest at :apredeter- :time rin'the `cycle of .operations without `-.er.a1 Istitch'forming .andwork'ffeedins devices, but

these mechanisms, instead `,of comprising' cam disks lon the gmain sha-ft :of the machine as in :applicants prior patent, .aan constructed and arranged for .crank actuation while imparting the :required movements to the stitch forming and f work feeding devices and likewisegpermittine idisconnection .of .these elements upon Stopping the machine- The well 'recognized advantages of crank opv-e'rated mechanisms are thus secured and Yaggrna- .dueyshocknr jarwith :the stitch forming and having cam slots Within which are oscillated cam followers'byconnections to the respective cranks :of the crank shait'the .corteuration'of the different :cam slots ibeing .arranged in accordance with rthe requirements of Ythe respective l.actuated devices.

The nrankor actuatingtherneedle is indicated .at-3% tEigs,.2, 4 and Y?) -and is connectedfbymeans a link Alito-.a rock arm 4t2 pivotallysupprted on a cross shaft #A .at the rear fof lthe mach-ine. .The forward-endfof the rock armis providedvvith a roll or follower :46,see 3, lwhich is received Within a cam slot 68 in the needle cam lever'. .For'each revolutionof the :cra-nk shaft, the 'fol- Alower is oscillated man arc :from one end fof the ...cam slotte the fother and back ,to Vthe starting limit Aof .itsthrom -at rwhich l.time ethe velocity .of the .follower -in the -cam ,slot drops to zero, a

smooth running :mechanism is obtained which makes possible ,the K.use -of relatively,light-weight .parts.- j

AThe take-uprmechanism,liereinafter described,

actuated fromfthe cran-1:50 (Figs. i1, 4 and 5,)

at the left-hand end Vof-the 4crank shaft36, as viewed from :the -iront. The Acrank is connected by link`62 to rock arm Alili `pivotally mounted on cross shaft 44, the 7rock arm being provided at its'outer end with a follower roll similar to the one illustrated in Eig. 3 and which is oscillated in an `arcuate lpath Lalonga nam slot in cam lever 58. The dwell portion :of vthe 'cam slot is indicated 4at 1Q, -While the lactuation of the take-up occurs during the Atraverse bythe r0l1-of vthe inclined portion F12, `a brief dwell being provided at the `upper end bythe short ,arcuate portion 14,

in addition to that .afforded -by the passage -of the `crank tlnfoW-B-over .dead center. g

The timing `vof the takeup relative to the .needle is determined principally by the angular .slipping ,or imisadilstment. Vche !"aeteristic movements-.of the .devices Aand j position -of the take-up :crank throw 6i) compared with that of the rneedle `crank 1% `(see Fiss. 5 and Y),` Since `s l'iait 3S is preferably of -c-neapiece construct-ion, the positions of the cra-HKS may b2 uiately located .and .the proper timing lof :the parts maintained with no .risk o1 Variations in fthe chine is produced having all the 4novel and de` minor adjustments in timing may b'efquickly andr easily effected, however, through substitution of the individual camy levers;fand:atjfconsiderably kreduced;expenseas compared ith cam'fdisks.

.` The crank Vfor actuating the feed mechanism videoI wahl a @am vsioni |30 within which is `rtrj ciprocated a rollfor follower |32 Carried byan upward-*extension |34 of the needle-camlever'l). y. The parts are shown in Fig. lLwith'the clutch Y in clainpingfposition, the follower |32.bein`g a t= islindicatedat iejwith'itsconnecting liniats,

Figs. 4: and 6, While the crank' for the a'WliS Vshown at 89 in Figs. 4 and 8, with connecting uri; 82 to the awifrock-farm; The vsnuttieis -d-riven from stillanother crankll, 'Figs. il and`9',.

and the flo'oper from'k crank SS, Figsji and 410.

Each crank aotuates thro-ugh a connecting'link and rockarm va cam lever having'afcam slot ofY the c'onguration to operate 'therespectivedevice in the required manner, the rook-.armsbeing arranged along-the crossshaft lilly and-the cam' levers along a parallel! supporting shaft '99.

. The various stitchforming and: work handling devices are actuatedfrom theirrespective cam levers -through appropriate linkages.' I n order Vcrank shaft, rock arms, and cam' levers. 'As a l,

result, only the lighterportions or the mecha'- nisms need be 'stopped quickly and: accurately, i

the? innerendlof'the carnslot' |3,1while 'the f clutch'i-s released-when the' follower; 1 is atj'the j outer end of 'thes'lotgY as indicated bythe dotted 1 outlinel.

.The crank-shaft is j'ournaiedinteaings -vi siam the machine frame, and is driventhrough intermeshing spiral gears' |40and-|42 from` a .drive shaft |64 extending throughthe -machine from Vvfront tcfback',the driveshaftgbeing `rotatef'i'from .l a' motor lflisee'FigQlZ) located in' `thebase-fof Y Y themachine l the vrelatively 4heavier parts being allowed-to coast to rest to an indeterminate stopped position. The arrangement and mannerof =operation"'o`i these disconnectible elementsv are similar in certain respects to those describedin thelinventors prior Patent No. 2,998,251 of NovemberV 9, i937.

' In the present inachinejtiie disconnectible "elements are arranged to Lbe connected and disconnected from the'cam levers, being moved 1in-to and out of operative connection means @of stop mechanism hereinafter.v described. The mechanism for actuating the 'needleirc the needle cam .lever .5o is 'iliustr-ated .in `Fig.' 53 and comprises a link' 92 pivotally connected at its forward end to one arrn'of a bell crank e4, the "other arm o-fV which.. is 'provided with a toothed sector SS meshing with gear teeth on the needle segment'. Adjacent its other end, the under side of the link is'iformed with a notch vor recess |69 adapted to fit 'over a boss -lilziof complementary shape `carried by` theupper end of the cam llever 5o. During the operation of the machine, the link is inengagementwith'the cam lever, being held fdownby a tension.'spring Hifi. The other stitch'forrning' and vworkhandling f Insewing around the' Vvmore din'icultfportions vof a shoe, itis frequently desirable -tosew'at a'speed considerablylessv than vthespee'datVV whichl the machine of-the present invention is capable of running. VVFurthermore,-Y 'although' the disconnectible links,'actuated` as hereinafter described, are fullycapable of functioning eiectivelyto disconnect the devices' from their cam leversv upon. throwing the stop mechanism into operationeven though the machine is stillro'- Y tating at very high speed, nevertheless" precise .adjustment is required to insure'thatthe stop .mechanism will operate at the correct instantv inthe stitch forming cycle so that excessive strains may -be avoided'. 'In view-of the fact thatthe'connection' 'and disconnection of the links'l is eiected, asv hereinafter described, by

means of `a singlecon'trol member or con- 'troiler,therefis provided" inithe machine of the present invention -a' combined' stop'mechanisn andy two-speed jd'rive'so `arranged `*that theconnection and disconnection ofthe Avarious devices with their? 'actuating cam leversA upon Istartingand stopping the machinetakes' place while the machine vis operating at relativelylow speedsythev startingand stopping yof the machinerand'the selection of.. either high or? low speed operation being A`under the control of the. i operator'through a single footitreadle.

The driving of the machine at either high or low speed lis` effected by means of two Ysets of chains Vand sprockets ofdifferent ratios between the motor- Hi' and the drives'haftl |44, the high y speed drive comprising motor sprocket1|5|l,chain i |52 vand drive shaft sprocket |54; while the .lowk

speed drive consists of motor sprocket |56, chain VA|58V andv drive shaft sprocket |501 The high". speed and lowg speed sprockets |54 and |60 `are I mountedV by means Vof ball'bearings v|62 on the main drive `shaft |44 'inindependentlyfrotat-KV able relation to oneanother andv the shaftjla sleeveI |65 and clamping nut |6 serving to` maintain the Vsprockets in proper"spacedposition ont the shaft.` Mounted between thef'sp'rockets |5'iY and |653v i'sa clutch-member I byiwhich either the high speed orthev -low speed 'sprocket may beV connected to the drive shaft- M4,4 or both disconnected therefrom -kupon rstoppingwthe No.- 2,698,288 off November 9, `1937. Asv in said patent, the clutch is arranged to-lam'p the workY upon rocking the inner memberl in counterclock-` wise direction.` -In thevpresent machine,V this rocking movement is effected by a leverlili: se-

-outer or actuated mem-ber 52d is connectedby link |26 to the bell crank lever IES-to which the presser foot is secured. The lever-|29 is pro- "l machine. The Vclutch member'isprovided with external oppositely directedD cone surfaces |10, while the sprocketsv -|511 and |60 `have internal cone surfaces' |12 and |'|,."respe`ctively. The

clutch member is keyed' tothe drive shaft-by Akeys VH'ir extending through slots |18 in sleeve |66 Vand shaft IM, the keys having flanges `|8|| for attachmentto thefhub'of 'the memberi.

To move the clutch dnember'into `and outof engagement with one or the other driving sprock-r Sets,v the v.inner-ends of the keys |16 are receivedV I in seats icmmedrrm :a smb .shaft A482V axiallyslidablegin 'bore l ica-tbe end of the drive shaft 1M. The projecting .end of istnb shafit'is formed .with 'a 'ball It -received Within -a-socket vin thenmxn 'end -o'f 2a rod ltelescopingfwithin van anni which .-issecured to one -end of a rock Ashaft :H2 `pivotally mountedl-in -lugs ,484, at :the 'rear ofthe machinetrame.V

The rock shaft |82 is actuated to shift the oth'e Vmain shaft -I44;through connections -controtled from a .foot vtreadle 495 Aat `the base of the machine.- These treadle -coritrolledconne tions include toggle mechanism vso arranged that when the treaclle is Yin raised or :released -position,

the clutch member is midway between the sprockets :and thus mit ofA engagement with either. 0n `partially depressing the treadle, the 'clutch member ismoved into engagement with the low speed driving sprocket 460, while fiull-y depressingthe ftread-le shifts the 'clutch'member into engagement with the high speed driving sprocket 4,54. t

- The togglemechanism, fbest illustrated inFigs. .hl and #1.2, comprises a yohe am `|218 secured to rock shaft +92, a cross 205 pivotal-lyA reoeived :in the outer ends of the yoke, and tog- @le arms '202 and 204. The anni :282, is pvlv oted en a. shaft 20B `secu-red 'by set screw 120B in la bracket 24 El clamped .to the machine Iframe,

` .while the-ether toggle arm 204 isin the torni :of a :rod slidable diametrioally through' pin 289 in the yoke, arm 1198. The outer fend .ofwthe arm M4 is `provided with a `stop evasher 1242 andcheck nuts '2l-4, While` a compression spring 246 lsnxirrounds the rod hetweeni-pin 200 land :the

shoulder Aof an eye ,portion 2 1-8 received, :between the' fonked endf220 xofrarni 202 ,a pin 22-2 extending through the parts AI-and 224! vto con- 'neet the two farms-of :the toggle..A

Io raise or flower the toggle vandl thereby'shiit the clutch member, the arm 202 is provided fat `onel side with a lug 224 (see..Fig. 1l) through which a rod 225 extends from the ifoot -treadle Collars 228 fixed to the treadle rod :226'

above and Pbelow the Alug 224 q-posi'tiontlre (togg-le `arms fin :the posi-tion vshownin Fig. 12 when the t-Ieadle is held, byspring 230 in -.raised position against stop screw v232. As shown im :said ligure, .the toggle -junotion 'is `slightly above l'ts center indicated ,by dot-and-dash i."

i1im24, fand the clutch .member is midway fbe- 'tweenfthe drive sprockets and thus in disconfnected iposition. When the ftreadle :is depressed .machine at high speed. On releasing the treadie, the :above operations take place in the reverse manner, the engagement `of the slow speed dr-ive ,prior to :frnal disengagement of th'e clisltohv serving to slow 4the machine 'down zsubstancially before the=disconnection of the links and the final stopping of; :the tsewing and-work .handling The mechanism -for disconnecting the disconnectible links from their actuating 'cam levers stopping the machine the crankshaft .is 4rotating, tlmughat reduced speed,V as a result iof the disengagement 'ef thel high-speed. dri-ve `and bnief connection of the lo-w :speed drive yprior to iinal disengagement-comprises a con-trolmem` hervorcontrollerv in Fthe form ofa-rockshaft 24U (see, Figs. l and 2) provided with fa series of arms 242, cache-rm having at'fits forward end a socket or recessi244 arranged to receive a downwardly'proecting boss #M5Y of semi-cylindrical shapeformedfat thefrear -endof each disconnectible VHThe rock -,shaftj240 isgarrangedto Vhe actuated to cause thetarms 242 to .engage their respective links at atime :in .the opera-tion ofthe unachinewhen the roam `levers, due tothe par-.- ticularricongurationsioftheindividual cam slots,

Vvare experiencing dwells. Uponfdisconnection of the links lfrom the cam levers, the links Iand their actuated devicesarelocked fin stopped position hyerigagementof the bosses -246 Withsockets 244 inthearms 242. v

'The 4actuation yof rock shaft 243 `to Adiscom'iect the links stopping the machine rand to vreh connect the samey upon .starting is effected 4hy starting .and stopping 'cams @2148 and 250 fmounted -on each side -fof -a vgear 252 :(see Figs.- 1, 2 and 11-1) driven by -gear 254 from thecrankshaftg, The

cams -248 'and 250 together with itheVg-ear :2152,

, 4ment with 'a 'follower on a stopping lever 258,

are4 mounted upon a :sleeve which is .splined :so 'as to be capable of .sliding longitudinally on the supporting shaft 256. fOn stopping the machine, the vcams .areshi-fted'along the Asupporting shaft .256 to bring-'the stopping cam 250 into Yengagewhile to start :the machine, the .starting (cam 248 4is brought into operative relation with-a follower on starting lever 260. The cams zare shifted, as hereinafter described, Eby means of an :arm 2GB engaging a groove 210 .in the sleeve on which the cam and the` gear i252V are mounted. The levers-258i 'and 265' are connected Vto 'an upwardly extending arm ,1262 connected-by a short link 264 to an arm 266'fsecure'd torock shaft '240. The arm 282 andlink 264 .form a toggle which is straightened upon sto'pping the machine to` rockthe Ydisconnecti'ng :arms 2422 of the controller upwardly, :the toggle being broken upon starting 'the machine to vrock the 'controller in the opposite direction and thereby 1lower :the disconnectiblex 41in-ks into engagement with their cam levers.

In order that the actuation fof fthe rock shaft upon starting and stopping the machine may be accurately synchronized yWith the'operation of the two-'speed 'driving mechanism, the shifting of the starting and stopping -camslongitudinally 71 lof the shaft .-256's eiected -by-connections vfrom the treadle -rod -22fV -bywhich the clutch Vof the 'two-.speed driving mechanism is controlled.

These connections comprise an arm 268 having a forked'upper end engaging the groove 210 in the'startinggand lstopping cam assembly, ya rock shaft '212 on which the arm is mounted, anjd 'a 'second arm-214 securedfto -the :ou-ter end -of 'the rockshaftgsaid arm being provided with a pivotallv mounted -block N6 through which the up- ;pcr end of the treadle rod 226 passes. The rock vshaft J212 likewise carries la forked arm '218 .pro- 'vided with vadjust-,able stop screws 280 adapted to engage xa 'xed lug Vvi282V to limit the longitudinal movement :of the starting and vstopping cams. A .stop collar 2841s secured to the treadle rod below the block 2:16, while `a compression sprint;f 285 between the top of the 'block and an iadjusting nut 281 on the treadle rod provides a yielding connection upon downwardv movement fof the tread-le rod. A Y

With the above described arrangement, de-

"vpression of the treadleto, start ythe machine servesbothto connect thedrive shaft to the motor through the low speed drive and also to shift the `starting caminto position to engage the starting lever 26!) so that, at the proper time in the rotation of the crank shaft 36, the Yrock shaft2l0 is turned in counterclockwise direction.

to lower the disconnectible links into engagement with their actuating levers. Further depression of the'treadle operates as hereinbefore .described to disconnect the low speed drive and to throw the high speed drive into operation, theY spring 285 yielding to permit the treadlerod to slide downwardly relative to varm 2id. When the treadle is released to stop theY machine, the high speed drveis rst disconnected and the slow speed drive connected, and thereafter thecollar 1251i engages block 215 to shift the stopping cam'into operative positionV and effect disconnection of the' links while the clutch member 158 is moved into neutral position to permit the drive shaft and crank shaft to coast to rest.

In order that the stitches may be set with the I I thread locks 'a uniform distance below the surface of thework regardlessof variations in the thickness'thereof, the machine of'the present invention is provided with mechanism' v'arranged to cooperate with the take-up, duringthe passage vof the loop of lneedle thread over the shuttie, to measure in relation to the thickness of the Vwork the amount of thread drawn Voff from the supply so that the proper length will be available for setting the stitch with the lock at the desired depth. The take-up mechanism, already referred to, is similar to that illustrated in the applicants Patent No. 2,097,452, .datedNovem ber 2, 1937, in that the take-up arms lili and H5,

in setting the stitch, are moved from a position in which they are substantially parallelisee Fig.

16).,finto a position of substantial alignment at the limit of their taking-'up stroke, 'as shown in Figs. l andV 1'5, with the result'that the amount f,

of thread taken up is unaffected by` overthrow of the parts.y During the take-up stroke, a thread clamp having xed andl movable gripping jaws 286 and 288, respectively, is caused to clampfthe threadbetween the' take-up and the supply, WhiledurineT the upward movementy of the thread loop over the shuttle, the thread clampis opened to permit thread t-o be.drawnfrom ,the supply as required.

The threadmeasuring mechanismV for determining the amountl of thread drawn on from the supply relative to'the thickness ofthe work come prises a thread nger 2% adjustably secured by setl screw 292 in a bore in one end of aV bar 294. Thebar extends forwardly through the mechine frame with the finger 290 in position toengage l the portion of the thread loop between lthe take- -up arms when'the Ylatterare in parallel or retracted position, as in Fig. 16. 4The thread nnger is. positioned to draw -aside more o-r less thread,V

and therefore cause to Vbe pulled off from'thesupply a greater or a lesser amountof thread, by

connections `controlled vby the position of Ythe presserfoot whenin clamping position.`v The, bar 294 is slidably mounted in the machine fra-me `and is connected at its rear end to one arm of alever 29B by means of a short link 298. The other arm of lever 296 is connected by a link 30o to a lug| 302 onY the outer clutch member |24 ofthe presser foot lactuating mechanism. Since the angular position of member 124 when in clamping position is directly dependent on the'thickness of the Work devicescomprising alinkI disconnectiblyiconf. vices, a crank shaft, drivingineans' ther rising a member providedwith'a'cam l V lowerinwtlfie slot, aucranlandco the shaft to final stopping position.

engaged Yby the presser foot, vthe setting lof the :threadm'easuring flnger29| is'like'vvise [controlled f by the workthickness'. For thin Workgwhen the presser foot is relatively closeto the worksupport; the thread finger Ais in extended position, indi'-4 cated by-dotted line'wl in Fig. 16, and-thus hasv no lappreciable effect 'on' the amounty ofgthread drawn Ao'ff as the thread looppasses over thetop of the` shuttle.' As the thickness of 'the'work increases,vv the thread 'linger isz moved inwardly so thai-,fthe thread is engaged before theltake-up rmsreachfullyiretractedposition,divertingthe thread ,loopv and thus causing g additionalthread- .a ifol'm' which willjpermit thejfthread lock tope-drawn the proper distance into the'vvork when the' stitch 'issetbythe take-up` 'i "i to be pulled,` olf from the supply in a 1 The thread clamp isactuated to-grip the thread duringthe" setting of the stitchjby means of av cam GGS on `drive shaft,ldifthelcamfhaving an axial cam 'slot S in .whichisfre'eivedjafollower 3 lo onv 'a `roclpariniin 2 .pivotallyfmounted on the machineframej a block :lili` throughwhich passes aredujced end portion oiga bar ping jaw- 288 isniounted:A A compression vspring Sid provides a yieldingjconnectionwhen .thearm rocked inV clamping direction; ifwhile check nuts 'Slietract the Ioar''l 6 on the'releasegstro' g The thread measuring' mechanism 'herein dis.

closed forms the' subject-matten .offf al div applicationV Serial No. $20,548; nledNovemb The nature Vscope of the present L 1 having been indicated; and a -maonine specicallydescribed, what is claimedjis:

1. An' outsole'shoesewing machinejhavinggfin combination, stitch formingand workfeedingide arate'trains of connections,forfactuatingcert' 'ri ofsaid devicesv 4from, vthe, crankshaft, eacni co,

imparting a relativel movement f toyth and follower lengthwise of' 'mesi-ot, fsai'd" prising ments, and' 'means' for actuating said control member to disconnect the actuated devices theshaft While permitting continuedrotat nof An outsole shoe sewingmachinefhavl combination, stitch forming and work feeding lower inthe slot, a Vcrankanljconnectionsfor ,re-y ciprocating .the follower llengthwise ofthe' SlOt,

said member: being fmountedfformovement back and forthftransvers'elv of thes'l'otdurin'gfthe reciprocation 0f the follower, means f orftrfans'mitting said back and forthmovement toene of said nected tofsaid'member, means for/disconnecting the crank The 312, is providedv with;

3 l 6 onvwhich thejzrnovable grip# I @mais Y' the severalfeaturesof theinvention havingbeen f de# n vices, Vacrank shaft, driving means therefonQseparatef trains 'of A connections for actuating certain Y. 'of said devices Yfrom the crank shaft, each comprising a memberprovide'd'withacams1ot,"afols;

shaft .from its driving means, means comprising a control 'member for movingsaidlink no disconnect. n; from' sain siones. memrercland ineans for actuating said'controlmemberj to'dis'l connect said link While permitting continued ro` tation of the crank shaft to inal stopping`positin., Y

3.,'An`outsoleshoe seviin'g machinefhaving, in combinatcnfstitch c-r'r'ning vand Workffeeding devices,v a crank shaft,` driving means'therefor, separate trainsv of connections. for actuating cert'ain of said devices 'from theY crank sharia.v each comprising alever provided. Witha cam slotlextending .lengthwisejthereon a follower, in the. slot',

a. cankand connections 'forfreciprocatin'g'th'e` follower theslotto broducea backand forth of the levert` means for, transmitting said movement to one of said devices, comprising a llink disconnectibly connected tosaidvlevenV means for disconnecting the crank shaft from its driving meansgln'ieans c ornprisingfa control mem- Vber,for-mcviligsad linkto disconnect it from said L flever, and meansforactuating said'ccntrcl memher to disconnect saidl'nk ,While permitting, con,- inlled rt'tiOIifOf thdfrank sha-ittoffmd stop# pmgposm, .Y

y 44. outsolel yshcefsewing machine having: in 'combinatie stitch lforming and/Wrk'ifeeding defi/"idees,v crank shaft; diiving(I means( therefor, sexarate ftraii'isfc-f` conne(:tions'for actuating" cer.- fa 0f Saldfdevcd from. the crank. shaitfecl comprising', a.. member provided with aY canSlot, a follower the slot;v a. crank andconnectioris; ior imparting arelative movement to thevnernber and follower. lengthwise olthe slot, saidciollower andmembef being mounted forrelative back and forthf movement transversely offthe.. slotJv during themoveme't'oi the followerlengthwise ci the aecomo rate trains 10i? mechanisms for- YactuatingV the devi-ces from the drive shalftythe t-r ins'l ofnieclianisms includingjelements adaptedv to be disconnected to. disconnect thedevices remthe shaft, and control jineans voscrativ`e on stopnin'gthe' machine to disconnect che high s-peedjdrivingV mechanism and connect the lowA speed; drive and thereafterV to disconnect the disconnectible elements' of the trains omechanisms While disengaging the drive shaft from itsdriving means to permit rotation ciA said shaft; to, irma-1 stopping` 8. Armachine having, combination, vdevices cooneratingv to perform` an operation' a' drive shaft,Y driving'Y means ,therefor including high speed and low Vspeed dri-vers, afpiuralityioi sepa-v slot, means .lfor 'i'.ransrnisting saidback andiorth movement to one,cf's'ai'd devices comprising anv element movable. tofdisconnectA said devicerorn the" crank shaft.; cleans; 'for disconnecting nie crank, shaftj'nom; its di vine means, and means for movinggsaid, movable lernfetsfupon `stunning theV machine to bring seid devices toA rest `While permittin contined, rotation ofthe'cra'nkfshait to?naiilstopping-position-f Y s 5 .7'An outsole` shoe sewingzfrnachine liavi'ngt in combination, jstcn forming' and .work e'ediine ydwrces,;a, crank snafejdnvmg 'marismas-einen pluraltyjo trains offmechanism fonactuatins certain of said devices from the crank `shat,`,each

comprisi'nga rock 'armalihkconnecting' saidlaim with a, crank ci thefcr'anl shaft,` al lever' provided with a cam slot, therei'rn aviollower carriedn bythe rock arm and lsliding"Within the Ucana/slot tdrock thev lever, andconnections betvzeenfthe lever. and

its actuated'dev'ce1-v Y y 6. An outsole shoe sewing machinelhavingL in coinloinat'iorr`4 stitch iormingV and Work feeding c devices including avi/drk piercingI needle andY a presser 'foot adapted to. clamp. and unclamp tne Work, a crankshaft, driving "ineansfthereicr,

mechanisms "for actuating. the. devices from the crank shaft,the 'mechanism for actuatin'efthe presser foot. comprising a Horton clutch having actuating' actuated 'elements-,I conect ingthe presser Vfoctwith.'the actnated. element of the clutchL/ a lever V`provided` with cam slot therein 'and connected Wi'ththe actuating. element fofthe" clutch', and aioliovv'er, engagingjthe cam 'slotzand'actiiated by the crankshaft tdcause, the clutch to ciampi and unclamp the work.

'7. A m-aclrine having in ccrrrbinationV devices cceperatmg to perform, an operation, drive shaft, driving mea-ns {therefcr including high speedi and lovvspeed driving4 mechanisms, sepa#- rateY trains of mechanisms for, actuating theV deviceslthe drive shaft,kthe trains ofmech-` anisms including elements adapted to be disconto'disconnect'vthe devicesA from the shaft,

speed or the low` speeddriver tojtheshaifm and single control means operablei to shn member' and; toV connect` andi' disconnect, the disconnectiole elementales-id means being operative, on stopping thernac e, to shift the, clutch member out oi engagemenU with the high.. `snee,cl driver and'into engagement. with the low; lspeed dri *er and thereafter to. disconnectl the.l disconnecticle elements of the trains o mechanisms Wliledisengagingl the clutch irs-:moei: from the speeddriver to permit rotation or" the. drive shaftto inalstoppingpositionf A machine lievi-ng;y in combination-`devices cooperating to' nerf an Q'n-eratn'nn;v aI Adrive shaft, Adriving means therefor' including` high speed and iov-J` sneed'driving' mechanisms, sena?, 'rate trains, ci 'mechanisms for actuatingl the devices YfromY the dri-ve' shaft, 4 the, trains of mechanisznsj including elements movable to 'connect and disconnect actuated devices fromy the sluit,A means including start land stoppingcams. starting*andV stopping cani leversffor moving the.' elements to connect'and disconnect the. actuated devices vfrom the, shatfron starting and stopping the. machine, a -tieadle 'andftradle actuated, connections operative, on) starting. Vthe niachine'to. connect the. low speedcl'1. i.ve,1ar1dA likewise.rendeneperatidzeY the starting; cam

startingfcain lea-'er toconnect the movable ele.- ments of the' trainscf mechanisms and theres. aiterto. disconnect-.the 10W. speeddrivefand connect, thehigh speed'dri-ve,v operativqon:

stopping Y the;y machine. to.. disconnect, the, high sneed. drive and connectv 'shell'r` ,c s, s f-rspeeedfivewdthereter render operative the. *stoms-img-Y and l stepnir-iglcazm leverv toY disconnect-the actuated t V.devices from; the shaft `whileKdisevngaging, the

10 lL-machine hai/ina, in, combination. .desi-ces.

the 'clutch tions actuated by said treadle rod upon engagement of the clutch member With the low speed driver to shiftvthe starting cam into cooperating relation with the starting cam lever to effect connection of the disconnectible elements of the trains of mechanisms.

BERNARD T.` LEVEQUE.

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