US2752735A - Shoe heel surfacing machine - Google Patents

Description

July 3, 1956 J. P. QUIRK ET AL SHOE HEEL SURFACING MACHINE Original Filed Dec. 3, 1947 5 Sheet-Sh'eet 1 INVENTORS Jusrnv P. Qu/eK Lumv/q q.P. HAFNER ORN Y 5 Sheets-Sheet 2 J. P. QUIRK ET AL SHOE HEEL. SURFACING MACHINE July 3, 1956 Original Filed Dec. 3, 1947 FIGIO INVENTORS Juan/v P. QU/IZK LUDW/G C .P. HAFNER WK AT TOR NEY July 3, 1956 Original Filed Dec. 3. 1947 J. P. QUIRK ETAL SHOE HEEL. SURFACING MACHINE 5 Sheets-Sheet 3 FIG. 3

] INVENTORS JusT/n/ P. QU/IZK LuDW/q P. HAF/VER ATTORNEY July 3, 1956 J. P. QUlRK ET AL 2,752,735

SHOE HEEL. SURFACING MACHINE Original Filed Dec. 3, 1947 5 Sheets-Sheet 4 [33 FIG. 4

INVENTORS JUST/N P. Q u BK LUDW/G G R HAFNER y Q W ATTORNEY J ly 3, 1956 J. P. QUIRK ET AL 2,752,735

SHOE HEEL SURFACING MAQ HINE Original Filed Dec. 3, 1947 5 Sheets-Sheet 5 FIG.5

INVENTOR s JUST/N P. QU/EK Luow/c, 6,2 HAP/v52 ATTORNEY United States Patent SHOE HEEL SURFACING MACHINE Justin P. Quirk and Ludwig G. P. Hafner, St. Louis, Mo assignors, by mesne assignments, to Quirk Machinery Company, St. Louis, Mo., a corporation of Missouri Continuation of application Serial N 0. 739,454, December 3, 1947, now Patent N 0. 2,653,424, dated epternber 29, 1953. Divided and this application March 30, 1953, Serial No. 345,494

9 Claims. (Cl. 51-145) This application is a continuation of our prior Patent No. 2,653,424.

This invention pertains to a shoe heel surfacing machine, generally, and concerns itself more particularly with a device that is capable of performing such operations as sanding a wooden heel, and bufling, polishing or otherwise operating upon a shaped or partially shaped shoe heel, entirely automatically with the exception of a loading operation.

Generally, it is an object of the invention to provide a machine of the type described which when once put in operation will thereafter continuously and automatically perform surface operations upon shoe heels without manual intervention, manual loading excepted.

More specifically, it is an object of the invention to provide a machine of the type described which will impart to a shoe heel the necessary complex motions for moving the same against a surfacing tool whereby the latter will pass over and follow given contours of the heel, the said surfacing tool also being given complex motions capable of giving to the heel additional shape or surface characteristics.

Further, it is an object of the invention to provide a machine of the type described having an automatic onerevolution clutch for imparting intermittent rotative movement to a heel jack whereby the latter is stopped periodically to receive a shoe heel.

Also, it is an object of the invention to provide a machine of the type described having an automatic heel jack and an automatic heel ejecting mechanism.

Briefly stated, the machine embodying the instant invention comprises a frame upon which is mounted a shoe heel surfacing tool and a shoe heel feeding mechanism which latter device, in broad terms of operation, feeds or moves the shoe heel against the surfacing tool. The heel surfacing tool, per so, may take any one of several forms, for example, a wooden heel sander, which includes a continuous abrasive strip passed around two horizontally disposed disc spools, one of which is powered to move the strip longitudinally. The shoe heel feeding unit is powered by a separate motor mounted on a bracket which is pivotally connected to the frame in a manner such that the same may be moved toward and away from the surfacing tool. This bracket supports a cradle in which is mounted an automatic heel jack and an automatic heel ejecting mechanism and further carries the necessary mechanisms, including an automatic one-revolution clutch, by means of which the heel jack is rotated and is moved relative to the surfacing tool with the complex movements, Well known in the art. Additionally, a power take-01f is associated with a central shaft of the shoe heel feeding unit which take-off powers and controls the movement of two fingers adapted to give additional movements to the surfacing tool in timed sequence with the movements of the heel feeding unit.

Other objects and advantages of the machine will become apparent as the specification proceeds and a more comprehensive understanding of the invention will be 2,752,735 Patented July 3, 1956 afforded from the following detailed description when considered in conjunction with the accompanying drawings, in which:

Fig. 1 is a front elevational view of a shoe heel surfacing machine embodying the instant invention;

Fig. 2 is a top view of the same;

Fig. 3 is a front elevational view of the machines heel feeding unit showing parts thereof and ilustrating its mounting arrangement on the frame;

Fig. 4 is a side view of the machine, in partial section and with parts removed for clarity, showing details of its heel feeding unit, surfacing tool, and the power connection through which control of the latter is effected in timed relationship with the operation of the former;

Fig. 5 is a fragmentary plan view of the machine, with parts removed, illustrating the relative positions of its surfacing tool control mechanism and heel feeding unit;

Fig. 6 is a detail view, in side elevation, of an adjustable mounting bracket for attaching the heel feeding unit to the machines frame;

Figs. 7 and 8 are side and bottom views, respectively, of a clutch plate employed in the machines automatic one-revolution clutch;

Fig. 9 is a front view, in partial section, of a sliding cam, its cam follower and cam follower stop by means of which the machines onerevolution clutch is automatically engaged and disengaged;

Fig. 10 is a top view of the sliding cam illustrated in Fig. 9, showing a manually operated latching mechanism therefor; and

Figs. ll and 12 are detail views of a jack lift cam and its follower which controls the machines automatic heel jack, the latter view more clearly illustrating these parts in the positions which they occupy in Fig. 3.

As previously stated, the instant invention contemplates a machine which is adaptable to perform a number of different surfacing operations on a shoe heel. It is especially well adapted to function as a sanding machine, however, and, by way of illustrative example, only, it will be so shown and described.

With reference to Fig. 1, the machine comprises, broadly, a frame 21 which supports a shoe heel surfacing tool, or sander, 22 and a shoe heel feeding unit 23.

The sander 22, against which a shoe heel is turned by the feeding unit 23, includes two horizontally disposed disc spools 24 and 25 around which is passed a continuous abrasive strip, or sand paper belt 26. The spools 24 and 25 are rounded and are mounted for rotation on their respective shafts 27 and 28. For driving the shaft 28, an electric motor 29 is provided, which latter ele ment moves the belt 26 in the direction of the arrows. An adjustably positioned brush 31 (Fig. 2) is supported on top of the frame 21 in a manner such that its bristles 32. ride against an inner surface of the belt 26 (Fig. 4) and hold the same firm at a point where the feeding unit 23 presents the shoe heel to the belt for performing the sanding operation.

Although the function of the feeding unit 23 has been described broadly, as that of presenting a shoe heel to its surfacing tool, it also performs numerous subfunctions, each of which requires its own specific mechanism. These mechanisms combine to form the feeding unit as a whole, and accordingly, each will be described as a part of it.

For supporting the various components of the feeding unit, a frame is provided which comprises a vertical member 33 (Fig. 3) and two horizontal members 34 and 35. The vertical member 33 has two bearing collars 36 and 37 formed as a part thereof which pass over, slide along, and pivot about a shaft 38, the latter element being retained in a shaft bracket 39. A stub shaft 41, which forms a part of the bracket 39 is passed into a block bearing 42 3. .ishld. t er n by a coll r nut4 t e pe ittcuw ch the block bearing 42 occupies with respect to the frame 21 is determined by a two-way adjustable mounting bracket 44. Fig. 6 by 'meansoftwhich tit is connected to-.the.- .sa-id frames Here, a rod-like extension 45 of the bloclo bearing 42 is 'passedintoz a :bore 46 ,of a firstvrigid.brackenmember 47. A thumb, screw;48,-:threaded.into.theends of=the e tension 45 moves the latter longitudinally .ofi-theiborei46 to (adjust the position. of 1 the. shaft .41, which; adjustment is maintained .by a bolt .49, passed-.thrq l h a 510i m the extension 45. A key 52,,- positioned in keyways in the extension -and the bore 46,1prevents-thezrotation ofwthe former in .-.the. latter. Similarly,-, an-.extension-,53 elf-themember 4% isarrangedin a second bracketmemberfi l to.- .provide.a .second adjustment forythe position of the, shaft 41 at right angles to the first,a .thumbzscrew-55,;-a lock boltrsfieancl. a key 57 completingjheassembly. Here, the-member: 54-.is secured to the frame 21;;by-.-anangle bracket 58.

The:horizontal-member 35 jis.passed.over a shouldered end of ;the. shaft 38 and is held thereon to pivot about said shaft between two thrust bearings 59;he1d;in;place by a shaft; lock nut 61.,- The member 35 pivotsaboutthe shaft 38uiv-ith-the,restofthe frame but doesnot move vertically i.

as do the members 33 and 34.

The foregoing describes the meansprovided for mounting-.theheel feeding unit 23, on the frame. 21 for-certain of-its,movementswithrespect to the surfacing tool 26 and for making adjustments to their relative positions. Thus,

it is seen that the members 33, 34 and .35 and .allthat they support'are free to pivot about the shaft-38; thatthe members 33 and 34 are adapted to move vertically with respect-to the shaft 38 and that the position of all three of these/members, collectively, may be adjusted with respect to the. surfacing tool 26 horizontally, by the thumb screw 48; vertically, by the thumbscrew andtiltingly, by rotating-.the-shaft; bracket 39 in .the. block .bearing'42., All

ofthesemovements and adjustments together with others tobe; described are given ultimately to a shoe heelwhich is supported for movement in the heel feeding .unit in a manner-now to bedescribed.

With reference to Fig. 3,;a heel-62 .is. supported in an automatic jack 63 which, in turn, is mountediorxtilting movement ina cradle 64. Inaddition to being tiltedin the cradle 6 the heel 62 is rotated about an axis. 65, knownuasdhe heel'axis, and is further given a lifting motionparal-lelto said axis. Power for operating the. heel feeding ;unitis supplied by .an electric; motor 66 and istransmitted through an automatic. single-revolution clutch 67 to .a central drive shaft 68. This shaft, which mounts a shape ca m 69 and a tilt cam 71, is connected by means ofadouble universal joint72 and a slip joint 73 (Fig.4) witha revolving base 74 of the jack 63, the universal and slipjoints providing for the positive rotation .of. the heel jack-p63 during the time itis being tilted. in .the cradle 64. I

The. cradle-64' comprises a horizontal; basemember 7 9 from which arises a vertical member 81. Throughthis:

last:mentioned,member a bolt82 is passed into the-frame member- 33 (Fig.5), the bolt 82 serving as a pivot about which-the cradletilts Depending from-the. base member 79*-'isan apron -83 -(Fig. 4) which supports-a cam-roller 84.1fo'rcontact with "the tiltcam- 71'." The camroller '84 is bearinged in a -movable arm 85 which is-verticallytadjustable in=aslot-86 (Fig s 3 and-'4) in'the apron lay-means of--a thumbscrew 87 passed'through the member 79 andread d i t t eatm...8 w jus m t giyen to he. cam roller 84, through the movement of the arm 85, changes the degree of tilt given to the cradle 64 and is maintained by means of a lock nut 88. Also depending from the base member 79 is a cradle guide arm 89 which supports a guide roller 91 to contact a face of the member 33. The guide roller 91* is-adjustable-against'the member .33 in a movable:.,roller block .92 ;by..means;of:.;a set;

screw- 93 passedthroughrthmmembelzvw, all asshown. The guidemller assembly just described;-.provides.'fora h accurate movementof ,the cradle 63 about its pivot, 82.,

extension 99- nesting itself .on :a semi-circulareshouldcn1S cut .in a face of.said;upright.95t.r. By. rotatingtheextension.r 99in.the upright-'; it-is possibleto adjustithe position of a heelwithimthejack 63aboutnan axis .A: (Fig. 3),- which passes through the base of the heel-and-is normal to.theulongitudinaliaxis 653thereofz; Further; theuaxis A and the longitudinal axisiofthe. bolt 82:;lie inia'conunonv; plane so, for two positions .Of) the base 74.( 901degrees-in either directionfrom:thatwhich itsassumes-in Fig. 3) ,athis adjustment may bethonghtof asibeing made about .thetilt axis of the. cradle 64a Supported on. the base. plateultlmis an adjustable. heehstop-.plate'tltlhover.whictnis carried .-.a .heel. :plate 102.- pivotally connected toet'he .stop .plateuat; opposedepoints. 103. Theheel platelQZ':is.,biased.tovits uppenposition by. a spring .104 .and.-;has;-a1plural-ity .Ofh0l$f510.5lll.ltfl. therein, through-1 which ;-.sha-rp' pointed-"pins. 106v pass: to. engage a heel when the same is clamped in thQgjfiQkz. The .heel plate IQZxis shaped to fitaand support anyrsizc heel;-

Returning ,to .the. extension 96;...thesame ,lS rotated in a bearing 197- and the-base 74 isheldinplace in the cradle; by a ring nut 198 which is threaded-onto theextension, 96. A camsupport 1h9-ispinned.t0;;the..ringnutJQStto rotate therewith andmountsa jackliftcameegment 11 1) (Figs. 11 and 12) whose function will.-be'.described lately Also forming. a part of thejack 63 (Figs.-3, 4 and 5} is a heel clamp 11 2, which is:automatically movable-ito wardandaway from a .topjlift 113 ,of;the heel;62..first;. toclamp; .the .heel; in the=-.jack; and to ;thet cafter-release-. itfor automatic: ejection; The heel;,clamp; 112Jcomprisesa rod- 114 having its free end 116 ;serr a-ted,-as shown,-.to contact thcheel. Thishrod ismounted .for rotationiin; a clamp.v arm 117 and isretained within its-;bea-ring,;118.- by a nut 1.19; The .clamparm 117 is bolted to:a clamp arm.blo.clt.121 which has a bore 122extending(there: throughprovided .to receive .a. supporting rod 123 along which the blockxslidest. As.-shown, -.the.rod-123 isan-m chored in the upright memben -81 of the cradle. 64 to move. therewith. The block 121,;which is shaped in cr.oss.sec-. tionsubstantially as shown in Fig. S hasa secondborew 12.4411 which a lift pin 125 slides Aligned withtthe lift pin125 and threaded into the block 121 asshown-imFig: 4 is a thumb-'screw 126 which 1S'llSfid 'iO-fidjHSf:ththblOCk 121 to accommodate the jack 63 for diiferent-sized heels. The block-121 is further providedwith 'anextension 127 (Fig.3) which supports acompressionspringlZS; The spring 123'- has a rod 129 passed thereth-rough which ex tends into-and slidesfreelyin a hole 131 in-the-extension 127'. The other -end oftherod-129 is-threaded and-is slidably passed through a hole 132 in --an-arm 133-bolted onto the upright- 123. Lyingunderneaththe-arm:133 "is a thumb nut 134-which .isthreadedonto the rod- 129, thesame being actionableto move the-rod- 129 downwardly-1 and to carry with it a nut 135 and a washer 136, the latter bearing against the top of the spring 128 to compress the same between it and the extension 127 Through this expedient the clamp rod 114 is held against the top lift of the heel 62 when the same is in clamping position in the heel jack. The strength of the spring 128 is of course adjustable by means of the thumb nut 134.

The heel clamp 112 is automatically operated to clamp, and release from clamping, the heel 62 through means now to be described. With reference to Figs. 11 and 12, the previously mentioned jack lift cam segment 111 is supported to rotate with the heel jack. As the cam segment 11 is thus rotated, it moves against a cam roller 137 (Fig. 3) which is mounted on a roller arm 138 pivotally connected to the guide arm 89 at a point 139. As the beveled face 141 of the cam segment 111 is moved against the roller 137 the arm 138 is pivoted in a counterclockwise direction (Fig. 3) and the lift pin 125 is raised to bear against the thumb screw 126 (Fig. 4) to lift the block 121 and the clamp arm 117 and its associated elements vertically. Such lifting action is against the forces of the compression spring 128, which forces hold the heel clamp 112 engaged. Thus, at an appropriate time in each revolution of the heel jack 63, the heel clamp 112 is automatically raised to release the heel.

Very closely related with the automatic action of the heel clamp 112 is the action of the automatic heel ejector 77, which will now be described. This mechanism comprises an ejector arm 142 (Fig. 3) which is pivotally connected at a point 143 to an extension 144 of the revolvable base 74 of the jack 63. At its upper end, the ejector arm 142 is provided with a tip 145 which contacts the heel 62 when the latter is ejected, and, at its lower end, the arm extends into a section 146 which acts as a cam follower. The ejector arm 142 is biased in a clockwise direction (Fig. 3) about its pivot point 143 by means of a compression spring 147. With the exception of a small period of time during the rotation of the jack 63, the ejector arm 142 is held against the action of the spring 147 by means of an ejector cam 148 (Fig. 5). A face 149 of this cam, which is rigidly attached to the member 79, is so dimensioned as to bear against the section 146 and hold the ejector arm 142 outwardly from the heel until ejection is to be effected. At such time, the section 146 falls into a drop 151 (Fig. 5), and, under the action of the spring 147, the ejector arm 142 is biased to move the tip 145 against the heel 62 with a snap action and eject the heel. This action is subsequent to the release of the clamp 112 previously described.

All of the movements given to the heel 62 by the heel feeding unit 23 are completed in a single cycle of operation, which cycle of operation is repeated continuously through the action of the automatic one-revolution clutch 67. The motor 66, which is mounted on a motor bracket 152 (Fig. 3) to pivot with the feeding unit 23 about the shaft 38, drives, through a coupling 153, a shaft 154 to which is keyed a worm 155 (Fig. 4). The latter is enclosed in a housing 156 secured to the member 34 and meshes with and drives a worm gear 157 which idles freely on the central drive shaft 68. To this worm gear is attached a clutch plate 158, illustrated in detail in Figs. 7 and 8, which likewise rotates freely about the shaft 68, these elements being connected by the screws 159. The worm, the worm gear and clutch plate are oil immersed in the housing 156 and the latter is sealed by an oil seal 161. With further reference to Figs. 7 and 8, it will be noted that the clutch plate 158 has two holes 162 and 163 drilled in a face thereof. These two holes are spaced 180 apart. On the same face of the clutch plate are two lugs 164 and 165 which are likewise spaced 180 apart, the lugs and the holes being positioned on diameters of the clutch plate which are normal each to the other. Lying immediately below the clutch plate 158 is a cam follower block 166 which is pinned to the shaft 68, as at 167. This block rotates with the shaft 68. In the right-hand section of the block 166 as viewed in Fig. 4,

there is housed a spring pressed plunger 168 which has, as a part thereof, a pin 169 adapted to be moved, under the forces of a compression spring 171, into either of the holes 162 or 163 in the clutch plate 158. The plunger 168 also has associated therewith a cam ro-ller 172 which moves with it, the same being mounted for rotation about a shaft 173 and held thereon by a nut 174. A slot 175 in the walls of the follower block 166 provides for the vertical movement of the cam roller shaft 173.

Once the machine is started, the single revolution clutch 67 is automatically operated, to carry the work feeding unit through repeated cycles of operation in a continuous manner, by means of a clutch control mechanism now to be described with the aid of Figs. 9 and 10 of the drawings. Positioned underneath the worm housing (Figs. 3 and 4) is a cam block retainer 176 in which is mounted a spring biased movable cam block 177. The cam block 177 is biased to its dotted line position in Fig. 9 by means of a spring 178. This cam block carries a cam segment 179 which presents a cam face 181 to the cam roller 172. The cam block 177, under the action of the cam roller 172, is movable from its dotted line to its full line position as shown in the figure. Here, thecam roller 172 has engaged a cam roller stop 183 which is bracketed below the slidable cam assembly on a bracket 184. The stop 183 is bolted onto its mount 185 as shown and has interpositioned between the mount and the stop a rubber cushion 186 which absorbs the shock of the cam roller 172 as it moves against the stop 183.

When occupying their relative positions as shown in full lines in Fig. 9, the cam roller 172 has moved to a position on top of the cam segment 179 and the plunger 168 in the block 166 is moved downwardly against the forces of the spring 171 to withdraw the pin 169 from either one of the holes 162 or 163 in the clutch plate When the clutch is thus disengaged, the heel feeding unit 23 is at rest, and although the motor 66 is in operation, the clutch plate 158 is the only part of the clutch which is being driven. At this time, the heel jack is in loading position to receive a heel.

The engagement of the clutch is effected by the action of the cam block 177 which moves it to it's dotted line position as shown in Fig. 9 permitting the cam roller 172. to rise vertically and pass over the stop 183. After this action has been completed, the pin 169 willpass into either one of the holes 162 or 163 to engage the clutch.

It will be observed, in all probability, that provisions must be made to release the cam block 177 from its full line position in Fig. 9. Thus, it will be seen that when the cam roller 172 moves on top of the cam segment 179 and comes to rest against the stop 183, it looks the cam block 177 against its return movement due to the forces of the spring 171. In other words, once the parts have assumed the position illustrated in full lines in Fig. 9, it is impossible for the spring 178 to return the cam block 17'? to its dotted line position. Accordingly, means taking the form of the lugs 164 and 165 on the face of the cam plate 158 have been provided. As these lugs move against the head of the pin 169 they press the same downwardly against the action of the spring 171 and carry with it the cam roller 172. The downward movement of the cam roller 172 withdraws it from contact with the cam segment 179 and the spring 178 is free to move the cam block 177 to its dotted line position. Once the cam block 177 has moved to this position, the cam roller is free to rise and pass over the cam stop 183 to engage the clutch.

It is advisable, in the operation of the machine, to provide positive means for locking the clutch control mechanism just described in its full line position as shown in .Fig. 9 whereby the clutch is held out of engagement.

Such means, which is illustrated in Fig. 10, is manuaiiy operated and comprises a lever 187 which is pivoted at 188 for movement on a bracket 189 extending horizontally from the retainer 176. The lever 187 carries a probe 191 which extends through a hole 192 in the retainer 176 to bear against an end of the cam block 177. When the lever- 187.-- is positioned .535 showninrFig. 1Q, zitqhqlds therearn rblocic 117 againsttmevementtunden thetaetionnoft th spring .178 t and r the clutch 2 operating rmeehanismtzis-t o rn ditionedrto hold thenclutch disengaged-.5. Pivoting thetlever v187 in r21 .clockwise direction rpaboutnthe point; 183.1 5 a withdraws. the. rproberlfll and permitstthetcam: block :177 I temoveto its dottedriine 'P'QSlilOiIi'dS illustrated-in Fig.-;9 s \vhereup.on.;tl1e-.ab0ve described: action of the. mechanism, to engage the clutch-takes places Thetcentralr drive shaft: .68 is tbearingedrfort .rotatiomi i themember 34 .=in a,bearingt=l93zs(i ig.;r4) andiextends through the. member. 35' -in atslecvc 194;:the; shaftvtbein'gzt; m vable. verticallvtin. therlast:mentionedcelementn. Ton t'heshaft 68.;is splin'ed the shape-cam: 6fi-and:the tiltcam t 7!; :by rneans of a key/195:;- eaeh beingxretaincdcin them-15. respective mounts 126 and197 Between:thesetWo-cams, a separator198 is interpositioncdnthetscam assembly be. ing retained-on thetshaft by-ia ring rnutwfin Thetshapct canto? rides against acam roller 0.11 which is mounted liliail arm v2'32 :extendedfromand attached-tamershaft; bracket 39. attached tovthetframefilgu Thiscamicontrolsr. the movement of .the feeding unitiitovt'ardrand iawaw from the surfacing tool-.26,-..-the sharpe ca.m;69 being urged--: atall times against-title. camxrolle'r 1201. a spring 263;; \vhichconnects atoneendzZtM (Figs-3) tw-i-thiihc il'11m'.u252 her 34 and at itsother end 2051 with the-frametZLt The. entire heel feeding. innit lying above themember: 35 is;given.vcrtical motiomby mcans of anradjustztblcnlift cam1 .236 which lies above a set screw block-#075carricdtonvv theunderneath sideofthememberfiSs Thencamasegment 30. 206 is pivoted ataitsendsabouttthe .pinslillia'and; ZQQE dtE is raised or loweredby-wayof adjusting ;thet1eifective+: height oi the sarncnby means of; arsctserewszll passed through the set, screw block 5207.: Thetqpzsurfztce of; the.

lift cam Ztldisengagedby.atcamzrollenfllwhich i fixcdmstbs ,required. movements the to the block 166..attachedrtmthe..shaft-68 Accordingly,,

as the follower ZIZJIidcs-Qn-Jher'Qam ,2Q6nth6 .Sh;t.ff'..68.:is..-. moved'verticallynto give lift'tothe heelfcedirig uniththe-t, shaft ofisliding within .therslecYe 119 .2. Theti pz iacen of the member provides a trackrtlpfln.whichjhepamng roller 212 .rides. when.the same :isLnot engagingrttherlift cam 2%.;

Inasmuch as thecomponent parts. of: thcnheek ecsi ne-i unit lying above thermember; SS-have: considerablerweight a counterbalancing spring-.213..-(Fig. 3) isminterpositionedbetveen thermembers-fi t and 35 .to. relieve a portion f". the weight'burden fallingonthe camzfollower 212.2. This spri is retained. on ta rod- 214 which I extendsithrougha a hole. 215 in the member- 35.ito.pass-therethroughr One; end oftthenrodris threadedintct the member S tes ShQWI1t15Q andxn .retaining washer 216;is heldraga-instn-the springr; by nicanstof'an adjusting nutr2l'L- The amount ofdoad-m ing on thecam fo1loweru212:ishthereforeadjustable by: means, ofthe tau-L217.

in the process of loading a :heelinto rih6-j21lil63jhz5 I is required that thettop liftportiomofthe-sameebe guidcdt in a manner such that the clamp-rodt114 twill engages the toplift'of the-heel:at a pointmarking-rtheheelaxis, Forthis purposetheheel-guide '78 is providedythe-same comprising a. fiber guide 1 block 218 which is -mounted= on an arm-219: The arm -21 9-'is bolted 'to the shaft"- brackct-39 with two b0lts221",; and -222,--Whieh are passed through two slots 223 and 224-in=the armr- The slots 223 and 224 are made wider than-the boltswhich they accom: modate and accordingly provid'e foralateraladjusb merit of the. fiber guide block 218 Withrespect to;theheel 62 as wellas for a vertical adjustment thereto. These adjustments are necessary to.position therguide blockfor various sized heels,

As mentioned previously, one of thefeature of the,,70 instantinvention resides in this-provision of means for giving movement; or movements to,a surfacing tool in tinted relation .totthe movementsof a heeL'gi ven by, a hecL'. feeding unitmoving ,the;heel-;against .thet oohl In .g hc. a

illustrative example,-in which. the urfabingtool: has been shown ,anddeseribed as a .sander-,- thisportion -,of the, de-r; i e etakes :a h form: of; :two m vable rfingers. which ea tagainst; the abrasive strip 26:10 performa function known inttheart as. :spooling.;"

In tspoolin'g a heelr the,;two breast COlIlfii'SrflL-Ihfi toplift of theheelareremoved, when the heel is cutinthe; heel cutting machincroL-by a subsequent-operational Whenn the: heel istlatersandeclnit is.neccssary-that this particular surface: of; the theei: b6';SCO UlBd and in :the .prior art this has been accomplished .by giving .to the. heel certain move-.- ments against the sander; Inethe present; machine the spooledzportion. Of-{the heel; if. cutsina prior .0perati0n,-:. may. besandcd; or the spoofing-may be accomplished Collie. pletcly-as: arsanding ;operation,=by -giving certain move- =nten-tszto the. continuousnabrasive strip 261i Themechauism :for doing this. will rnowtbc described :with :referenceto.i=ig's.t2;'3,.4 and 5.;

As. SfiEIl inPig. 2,1.two.;fiber fingers 225 and, 226mm provided which'tare movablenagainstthe inner-wsurfa'cerof the abrasive: strip r 26 -to: movevportionst oh the rsamenoutwardlywtoward the heel' gfeedingsunitm These fingersarc mounted upon =vertically zdisposed arms 22-7 and 228 and are horizontally: adjustable-within their respective .arms as is shownin Figs-4 for the finger 2'26-'by means of a i set screw 229, the arms 227 and 228 are separately mow-- able toward the heelfeeding unit in a suitable frame 231 against th'e forces of separate springs; such asthe-spring" 232-" (Fig-. 4) fOI'l'he--alm228v The arm-227 ismoved thusly bya carn follower arrn 233 and the arm 228 -by a'cam followerarm 234,- the-throwof each of.these arms being-adjustable by-separate thumb screws such" asthe screw=235 for thearm234; The arm 233 mounts a carrrroller 236 ancl the arm'234a cam follower 2376- Against these two-cam followerstwo cams-238 and 239 are rotated fingers-225 and '226-in' timed relationship 'With the rotatiotrof the; heel 62 in the heel feeding unit 23.- For--thispurpose-power is- -taken-from -the 'centrab drive shaft 68; as previousivstated,' by the sprocket wheel and chaindrivecomprising theelementsJS and 76; Hereythe chain 76 :is passed over a second sprocket 241, which "iskeyed to a spurshaftj242- mounted for rotationin an adjustable bracket 243' extending from and attached to the ,set screwblock'207"of-the heel feeding ,unit;23; A first universal, joint'244',a slipjoint245and a second universal joint 246' connect the spur shaft"-242 .with ashaft 247 upon which. the cams238 and 239*are carried; With this arrangement of the parts the cams 238 and 239 are shaped to give movementto the fingers 225 and 226 in a manner suchjthatat a given point in the rotation of the heel 62 and withits presentment to the sanding strip 26 the latter element will be moved outwardly in a first instance by the finger 226. to spool'theleft'breastcorner of the heel and in arsec ondjinstancetomove the finger 225 to spoolitheright. breast corner of the heel;

Althoughf the. immediately foregoing mechanism ,has been described as being employedv in connection with a sander toperform the operation of spooling, it is to.bc pointedout that the same isnreadily adaptablertomany. other uses. For example: the fin'gers 225 and 226, may be replaced by cutters, buffers, polishers andrso forth, 1 which will act. directly against, theheel to impart. various. different surfacecharacteristics thereto...

Operationr One of the essentiahfeatures of the instantinyention residesinits automatic operation, That isto say, once the, machine is -pl yaced in operation no. manual control J thereof is,;re,quired (to start; and stop its individual, cycles.

of operation. These are repeated continuously and auto matically, the onlymanual function Tbeingfihat of load-i in'g the, heehinto, the heclfeeding unit. As for the illus: trative example thc. machine ,-is,,pl,ac ed in operation by starting, heranotors 22 nd.66.,.; he fottner. drivin'sr he; sanding; .strip; 26,. and -,-the latter ,idling the worm gear;

1557 together with the clutch plate 158 on the central drive shaft 63. Assuming that the machine has been brought to rest by the clutch control mechanism illustrated in Fig. 10, and that the lever 187 occupies the position shown, the lever 187 is then moved in a clockwise direction to withdraw the probe 191 which conditions the automatic one-revolution ciutch 67 to be engaged.- At the start of the cycle of operation the jack 63 will occupy a position characterized by a movement of the jack in a clockwise direction of 90 from that of the position which it takes in Fig. 1. The jack will hold this position for one-half revolution of the clutch plate 158 at which time the heel clamp 112 will be in a raised position. When thus conditioned and during this period of time, the operator feeds a heel onto the jack by placing the same on the heel plate 102 and moving the top lift of the heel at all times against the guide block 213. Thereafter the heel clamp 112 Will be automatically operated to clamp the heel in the jack, and the clutch plate 158, which is rotating, will move one of the lugs 164 or 165 against the pin 169. This latter action will move the cam follower 172 downwardly to release the cam block 177 for movement to its dotted line position as shown in Fig. 9. Next the cam follower 172 will ride over the cam segment 179 and the pin 169 will pass into one of the holes 162 or 163 in the plate 153 to engage the clutch. Thereafter, the central shaft 68 of the feeding unit 23 will be moved through one complete revolution, during which time the heel will receive a lifting movement under the action of the cam 206, will be tilted under the action of the tilt cam 71, and will be moved toward and away from the sander 26 by means of the shape cam 69, all of these various movements being well known in the art. At a given point in the rotation of the heel in the jack 63, which occurs prior to the time the heel jack will occupy its loading position, the jack lift cam 111 will be moved against the cam follower 137 and through the operation of the mechanism, previously described, the heel clamp 112 will be raised to release the heel from the jack. Immediately thereafter the section 146 of the ejector arm 142 will fall into the cam drop 151 of the cam 148 and the ejector 77 will operate to snap the heel out of the jack. Next, the cam roller 172 of the automatic one-revolution clutch 67 will move against the cam segment 179 and come to rest against the stop 183. These parts will hold this position to maintain the heel jack 63 stopped in loading position for onehaif revolution of the cam plate 158, after which time the clutch will be engaged automatically to repeat the cycle. The machine will thereafter operate continuously, the operator loading a heel into the heel feeding unit at each period in the operative cycle wherein the jack 63 is stopped for the loading period, the number of holes 162 and 163 in the clutch plate 158 determining the length of time for which the jack 63 is stopped.

Various changes may be made in the details of construction, within the scope of the appended claims, without departing from the spirit of this invention. Parts of the invention may be used without the whole and improvements may be added while retaining some or all of the advantages of the invention.

We claim:

1. In a shoe heel making machine having a support, a tool mounted thereon and a work piece feeding unit for moving a work piece relative to said tool, means within said work piece feeding unit for rotating said work piece comprising a central drive shaft, a jack rotated by said shaft, means for driving said shaft, an automatic onerevolution clutch between said shaft and said driving means, and means for controlling the engagement and disengagement of said automatic one-revolution clutch including a latch operated by rotation of said shaft and a stop coacting with the latch whereby said central drive shaft is held stationary for a period of time equal to that required for a definite fraction of a revolution of said iii shaft, and means thereafter engaging said latch to release; the same during a complete revolution to define a single cycle of operation, whereby said cycle of operation is repeated automatically.

2. 1n combination with a shoe heel making machine having a work piece feeding unit adapted to move a work piece against a tool with reciprocating, tilting and lifting movements and, at the same time, rotate said work piece about an axis thereof, means for controlling the rotation of said work piece comprising a clutch plate adapted to rotate about a central shaft on which said work piece is rotated, a clutch block mounted adjacent said clutch plate on said shaft and keyed to said shaft to rotate therewith, a spring pressed plunger carried in said block having as a part theerof a pin movable into one of a plurality of holes made in a face of said clutch plate, cam operated means for moving said spring pressed plunger to engage and disengage said pin with said clutch plate, and means for controlling the operation of said spring pressed plunger by movement in a continuous succession of cycles in which said plunger is automatically disengaged for a period of time equal to that required for a definite fraction of a revolution of said shaft and is thereafter automatically engaged for one complete revolution of said shaft.

3. In a machine for making shoe heels, a support, a tool mounted on said support and adapted to perform an operation on a work piece, and a work piece feeding unit attached to said support and adapted to move said Work piece relative to said tool comprising a frame pivotally attached to said support, a cradle attached to said frame, a work piece holding unit supported in said cradle, means for rotating said work piece holding mechanism about an axis thereof, means for tilting said cradle and the Work piece holding mechanism mounted thereon about an axis normal to its axis of rotation, a shaft for rotating said work piece holding mechanism, means for driving said shaft, an automatic one-revolution clutch between said shaft and said driving means through which said shaft and said rotatable work piece holding mechanism are driven, and means for controlling the operation of said clutch whereby the rotation of said work piece holding unit is automatically stopped for a period of time equal to that required for at least one-fourth of a revolution of said shaft and is thereafter re-started and turned through one complete revolution of the same to define a single cycle of operation of said machine, whereby said cycle is automatically repeated.

4. In a machine for making shoe heels having a work piece feeding unit adapted to move a work piece against a tool and at the same time to rotate said work piece about an axis thereof, the improvement comprising a shaft supported in said work piece feeding unit, a jack in which said work piece is clamped attached to one end of said shaft to rotate therewith, means for rotating said shaft, a one-revolution clutch interposed between said means for rotating the shaft and the shaft itself, and a cam and a releasable latch for causing said one-revolution clutch to be disengaged and a stop engaged by said latch for a period of time to stop said shaft, tsaid period of time being measured by the revolution of said shaft and predetermined to be equal to that as measured by a definite fraction of a revolution of said shaft and means operating at the end of such period to re-start said shaft.

5. In a machine for making shoe heels having a work piece feeding unit adapted to move a work piece against a tool and at the same time to rotate said work piece about an axis thereof, the improvement comprising a shaft supported in said work piece feeding unit, a jack in which said work piece is clamped attached to one end of said shaft to rotate therewith, means for rotating said shaft, and a one-revolution clutch interposed between said means for rotating the shaft and the shaft itself and operating automatically to stop said shaft for a period ar n s equal to at least one-fourth of a revolutionthereof and, trelea e the-same anther-end ofsuch period.

6. ,Ir'na shoe ,heel: making mat hine having a support, a

tool mounted thereon and a work piece feedingunit for moving a work piece relative to said tool, meansfor rotatingsaid work piececomprising a -central driveshaft, a.

thereafter rotated through acomplete revolution to define a single .cycle of-,operation, whereby said cycle ofoperationisrepeated automatically.

7.. In a .shoeheel making machine, having a support, a tool mounted ,thereon .and-a workpiece feedingpnit for moving a ,work piece. relatively ,tosaid ,tool, means within said work piece :fe'eding ,unitfor rotating said .work piece comprising a centraldrive ,shaft, a jackrotated 'by said shaft,iandmeans for driving said shaft; the improvement comprising fi ,clutchelement connected with said shaft,

a complementary cltltchmlment rotatedv continuously by said -driving means, a connector on said" first element engageable withsaid complementary element to rotate the shaft; meansoperating ata fixed point in the revolution of said shaft to disengage said connector, and means operating a definite fraction of "a revolution later to.re-- engage said connector, whereby said shaft'is stopped at the same. point and for the. same interval for each revolution thereof.

8. In a shoe heel making machine having a support, a tool mounted ,thereon and *a work piecefeeding unit for moving a work piece relatively to said tool,'means Within said workpiece feeding unit for rotatingsaid work piece comprising a central drive shaft, a jack'rotated bysaid shaft, and means for driving said shaftythe improve- 12 mentncomprising, a clutch element connected with said shaft; a. complementary clntch element rotated continuously by ,said. driving means a connector on said first element engageableqwith.said,;complementary element to rotate the shaft, an actuator for said, connector, means operating at afixed pointinthe revolution-of said shaft to :causesaidactuator to,disengage said connector, means operating automatically ,totlock said actua'torin disengaginglposition, andmeans operatinga definite, fraction of a revolution. after, the. locking 0f said, actuator to unlock the same. and re-engage said connector-.

9. In a shoeheet making machine. having a support, a toolmounted thereonandawork piece feeding unit for moving-la work piece-relatively tosaid tool, means within. .said-work piece feeding nnit for rotating said work piece comprisinga central driveshaftga jack'rota-ted by said shaft, and means for driving said shaft; the improvement comprising, a zclutchjelementconnected with said-shaft; a complementary clutchelementrotated continuously by said ,driving,means, a connector on said first element engageable;with saidj complementary element to rotate the shaft, an actuator for said connector, means operating at a fixed point injthe revolution of said shaft to cause said actuator to disengage said, connector, means operating automatically to lock ;said actuator in disengaging position, and a lug onsaid complementary clutch element engageable with said connector to unlocksaid actuator and ,re-start saidshaft;

References Cited in the file, of this patent UNITED STATES: PATENTS l 2,057,290; Bradbury Oct. 13, 1936 2,099,017 James et al. Nov. 16;1937 2,123,269 Balle't al. July12, 1938 2,352,690" Cl'ausing July -4, 1944 2,359,488 Ponder; Oct. 3,1944 2,653,424 Qiiirketa1: Sept; 29, 1953

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