US1616715A

US1616715A - Edge-trimming machine

Info

Publication number: US1616715A
Application number: US355820A
Authority: US
Inventors: Laurence E Topham
Original assignee: United Shoe Machinery Corp
Current assignee: United Shoe Machinery Corp
Priority date: 1920-02-02
Filing date: 1920-02-02
Publication date: 1927-02-08
Anticipated expiration: 1944-02-08

Description

Feb. 8,1927. ,616,712

' L. E. TOPHAM EDGE TRI-MMING MACHINE Original Filed Feb. 2. 0 13 Sheets-Sheet 1 Feb. 8,1927. 15 L. E. TOPHAM v V EDGE TRIMMING MACHINE Original Filed Feb. 2. 1 l Sheets-Sheet 2 minss 1,616,715 L. E. TOPHAM EDGE TRIMMING MACHINE Feb. 8, 191273 Original Filed Feb. 2 1920 lasneezs-sneet 5 F B. 8 l L. E. TOPHAM EDGE THIMMING MACHINE Original Filed Feb.

2. 1920 13 Sheets-Shet 4 7 1,616,715 8, 1927- 1.. E. TOPHAM EDGE TRIMMING- MACHINE Original Filed Feb. 2. i920 1s Sheets-Sheet 5 1,616,715 1927- y L. E. TOPHAM EDGE .TRIMMING MACHINE 6 Original Filed Feb. 2.71920 13 s t s t 6 252%?2 Feb. 8, 1927.

L. E. TOPHAM EDGE TRIMMING momma:

1 Sheets-Sheet '7 Original Filed Feb. 2, 1920 Feb. 8, 1927. 15616,?15 I L E. TOPHAM EDGE TRIMMING MACHINE Original Fild Feb. 2. 1920 1:5 Sheets-Shet s iii Wilhes Izventor 1,616,715 L. E. TOPHAM EDGE 'I'RIMM'I NG MACHINE Original Filed Feb. 2. 1920 13 sheets- Sheet 9 1927 L. E. TOPHAM EDGE TRIMMING MACHINE l3 Sheets-Sheef 10 1519 Original Filed Feb. 2. 1920 Feb, 8, 1927. 1,616,715

1.. E. ToPHAM EDGE THIMMING MACHINE Original Filed Feb. 2' 1920 15 sheets-sheet 1} Feb. 8,1927.

L. E. TOPHAM EDGE 'TRIMMING MACHINE Sheets-Sheet 12 Origina] File d Feb. 2. 1920 Feb 8,1927. 1,616,715

L. E. TOPHAM EDGE TRIMMI NG MACHINE Original Filed Feb. 2. 1920 ll/i r nz4 l3 Sheets-Sheet 13 j a T ZZZ v 111 .15 Z16 Patented Feb. 8, 1927.

.unir stares raisin EHCE.

LAURENCE E. TOPHAIVI, OF SWAIVIPSCOTT, MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MACHINERY CORPORATION, OF PATER-SON, NEJV JERSEY, A CORPORATION OF NEW JERSEY.

EDGE-TRIMMING MACHINE.

Application filed. February 2, 1920, Serial No. 355,820. Renewed May 27, 19%.

This invention relates to shoe machines and more particularly to machines for operating upon shoes of the type in which the shoe and the means for operating upon the shoe are moved relatively to transfer the point of operation about the shoe and in which mechanism is provided for relatively moving the operating means and the shoe to maintain the operatingmeans and the shoe in the proper relative positions at the point of operation as such point is transferred about the shoe.

The invention is illustrated in the present application as embodied in an automatic machine for trimming the edges of shoe soles. Certain features of the invention are not limited, however, to machines for performing this particular operation, but may be embodied with advantage in machines for performing other operations. Also certain features of the invention are not limited to machines which are wholly automatic and certain features of the invention may be embodied in machines for operating upon shoes in which the shoe is held and manipulated by the operator.

The principal object. of the present invention is to produce an automatic sole edge trimming machine of improved construction and having an improved mode of operation.

Another object of the invention is to pro duce an automatic shoe machine of improved construction and mode of operation in which two ditlerent tools are employed to operate successively along different parts of the marginal portion of a shoe bottom.

Other objects of the invention are to improve the construction and mode of operation of edge trimming and other shoe machines which are provided with a tool or tools adapted to operate upon the edge of a shoe sole to form or finish the edge.

lVith the above and other objects in view the features of the invention consist of certain novel and improved constructions, arrangements and combinations of parts hereinafter described and particularly pointed out in the claims, the advantages of which will be readily understood and appreciated by those skilled in the art.

The invention will be readily understood from the accompanying drawings illustrating the invention in its preferred form and the following detailed description of the constructions therein shown.

In the drawings Figure 1 is a view in front elevation of a machine embodying the invention; Fig. 2 is a view in side elevation of the machine looking from the right; Fig. 3 is a plan view of a portion of the machine; Fig. 4 is a view in side elevation of the edge trimming head of the machine; Fig. 5 is a view similar to Fig. 4 illustrating certain of the parts in different positions; Fig. 6 is a view in front elevation of the edge trimming head; Fig. 7 is a view in vertical sec tion of the edge trimming head taken substantially on the line 77 of 6; Fig. 8 is view of the edge trimming head partly in front elevation and partly in section taken substantially on the line 88 of Fig. 4;; Fig. 9 is a view in front elevation partly broken away and partly in section illustrating particularly the driving mechanism; Fig. 10 is a view in vertical section taken substantially on the line 1010 of Fig. 1: Fig. 11 is a detail plan view illustrating the ack supporting and actuating mechanisms and certain associated parts; Fig. 12 is a detail plan viewof a portion of the mechanism shown in Fig. 11: 13 is a view in side elevation partly in section of a portion of the machine illustrating particularly the jack supporting and actuating mechanisms; and Figs. 14l and 15 are detail plan views partly in section illustrating in different positions certain parts of the stopping mechanism.

In the machine illustrated in the drawings the edge trimming mechanism is fixed in position as regards the trasfer of the point of operation about the work and a shoe supporting jack is provided which is movably supported in the machine to enable the shoe to be moved in the direction of feed to transfer the point of operation about the shoe,

and transversely of the direction of feed to maintain the edge of the shoe bottom in the proper lateral relation to the edge trimming mechanism and to be tipped and turned to change the position of the shoe with relation to the edge trimming mechanism to compensate for the surface and edge curva tures of the shoe sole. The movement of the shoe to transfer the point of operation about the swinging

arms

42 and 44.

the shoe is imparted thereto by devices acting on the jack to impart shoe feeding movements to the jack and the position changing movements are imparted to the shoe by devices acting on the jack to im-- cutter shaft 2 is driven through intermesh- 'ing

spiral gears

10 and 12 from a horizontal shaft 8 which constitutes the main shaft of the edge trimminghead. The main shaft 8 is journaled in bearings formed in the car ri ire 6 and is driven from an electric motor indicated at 13 secured to said carriage.

Upon the lower end of the cutter shaft 2 are mounted a cutter 14 for operating about the forepart of the shoe and a cutter 16 for operating along the shank. Upon the lower end of the'shaft is also mounted a sleeve 18 arranged to slide longitudinally of the shaft and provided with projections extending between the blades of the cutter 14 for engagement with the sole of the shoe,

shown in Fig. 7. The downward movement of the sleeve on the shaft is limited by a colla'1 20, and the sleeve is acted upon by a coiled spring 22 which tends to hold the sleeve in its lowermost position and allows the same to yield-upwardly.

To enable a shoe to be located and held in operating position with relation to the trimming cutters. the machine is provided with a work table 24 arranged to engage in the crease between the upper and projecting margin of the sole of the shoe. The work table is secured to an arm 26 on the frame, and is arranged to extend in front of the cutters, as shown clearly in Fig. 6.

The lasted shoe is supported during the edge trimming operation by a. jack 28 mounted on the upper end of a spindle 30 supported at its lower end to permit its gyratiion. The supporting devices for the spindle 30 comprise a'whe'el 32 rotatably mounted on a stud 34 and connected with tl e spindle by a gimbal joint. The stud 34 is supported at the forward end of a yoke 86 pivoted to swing in a vertical plane on a second yoke 38: The yoke 38 in turn is pivoted to swing in a horizontal plane on a link-frame 40 carried by and connecting The forward end of the yoke 36 is held up yieldingly by means of a coiled spring 46 connected to the yoke 38. however, is less than the force exerted by gravity on the jack so that the margin of the shoe sole exerts a certain amount of downward pressure on the work table 24 during the trimming operation. The matgin of the shoe sole thusrests on the table aud t-he shoe is partially supported thereby.

During the trimming operation the shoe is held at all times at the point of operation by the engagement of the table 24 in the crease between the upper of the shoe and the projecting margin of the sole. Relatively slight vertical movements are imparted to the jack and the shoe by the cooperative action of the spring 46 and the table 24, which serves as a guide for the shoe. The supporting devices for the jack spindle permit the lower end of the spindle to be freely moved horizontally in any direction and also permit the jack to tip freely in any direction about the lower end of the spindle. Tipping and turning movements are imparted to the shoe to position the shoe properly with relation to the operative edge trimming tool as the point of operation is transferred about the shoe. The required tipping movements are imparted to the shoe by devices acting to move the lower end of the jack spindle forwardly and rearwardly and laterally of the machine and the required turning movements are imparted to the shoe by devices acting to rotate the jack spindle. Because of the fact that the shoe is held at all times at the point of operation by the table 24, the tipping and turning movements imparted to the shoe are caused to take place about said table as a fulcrum.

The lower end of the spindle is moved forwardly and rearwardly and laterally in opposite directions to tip the jack, and the spindle 'is rotated to turn the jack through suitable connections from a series of cams mounted on a cam shaft 48 which, for convenience. will be hereinafter termed the pattern cam shaft.

Forward and rearward movements are imparted to the lower end of the jack spindle by means of a cam roll 50 mounted on a lever 52 pivotally connected to the crank lever, and a cam roll carried by the lever 58 and arranged to engage a cam groove formed in the under side of the cam disk 53. The mechanism for rotating the The force exerted by this spring,

lli)

jack spindle comprises a cable 62 passing about the wheel 32 and about a series of guide rolls 64:, 66, 68, and 70, a pivoted segment 72 to which one end of the cable is secured, and a weight 7 1 secured to the other end of the cable. The swinging movements of the segment T2 are produced and con trolled by a cam lever 76, one arm of which is connected with the segment '72 by intermeshing gear segments and the other arm of which carries a cam roll 78 arranged to engage a peripheral cam on a cam disk 79 mounted on the cam shaft 18.

The jack spindle is acted upon intermediate its lower endand the jack by mechanism tending yieldingly to swing the jack about the connection between the lower end of the spindle and the wheel 32 toward the rear of the machine. This mechanism comprises a rod 80 connected at its forward end with the jack spindle and acted upon at its rear end by devices including a spring (not illustrated), tendingyieldingly to move the rod rearwardly. These devices are arranged'to act upon the rod with a variable force andv are controlled by movements of the jack spindle during the operation of the machine. This mechan sm acts on the 1ack to maintain the shoe in proper rearward position with the work support 24: engaged in the crease between the upper and the projecting margin of the sole.

The machine illustrated in the drawings is provided with a movable gage ind cated at 82 for guiding the shoe to determine the distance at which the shoe is trimmed from the upper and thus to determine the-width of the projecting margin of the sole left after the trimming operation. The gage is p votally mounted at 84 on an arm on the frame of'the machine, and is constructed and arranged to extend upwardly from its plVOtd-l point to a point just below the work table so that its upper end will engage the upper of the shoe. The gage actuating devices of the machine operate under normal conditions to hold the gage at all times positively in contact with the upper of the shoe so that the position of the shoe is determined by the gage throughout the operation of the machine to cause the soleto be trimmed off.

at the proper distance from the upper at all points in the sole margin. The outl ne engaged by the gage is considerably different in shape from that to which the sole is to be trimmed and the gage is moved to compensate for the differences in shape between these two outlines. The gage engaging contour of the shoe is somewhat irregular in outline, the irregularities in the same being due to variations in the thickness of the upper at different points, to irregularities in the last and to the overlapping of the parts at the upper at certain points. In order that these irregularities may not be reproduced on the outsole, the gage 82 is actuated to compensate for these irregularities so that the outsole is trimmed to a regular outline.

The gage is also actuated to compensate for certain of the positioning movements imparted to the shoe during the operation. In order that a wider projecting margin may be left on the sole about the forepart of the shoe than along the shank, the gage is advanced in predetermined relation to the feeding movement of the work in pass ing from the shank to the forepart, in trimming the first side of the shoe, and is retracted in passing from the forepart to the shank on the opposite side of the shoe.

The mechanism for actuating the gage in this manner comprises a. rock shaft 86 mounted in bearings in the frame and an eccentric disk 88 secured to the shaft and arranged to engage a downwardly extending arm on the gage. The gage is acted upon by a coiled spring 90 which normally maintains the lower end thereof in contact with the eccentric disk. The shaft 86 is rotated to advance and cause the retraction of the gage by means of a gear segment 92 secured to the rock shaft and an intermeshing gear segment 94 formed on a swinging arm 96 secured to a rock shaft 98. To the rock shaft 98 is secured another arm 100 which carries a roll 102 engaging a contact face formed on the outer end of an arm 10 1 secured to a vertical shaft 106. To the shaft 106 is secured a second arm 108 upon wh ch is mounted a cam roll 110 engaging a peripheral cam face formed on the cam disk 53.

The mechanism for actuating the jack to impart feeding movements to the shoe comprises a feeding lever 112 and a bar 114 connecting the feeding lever with the forward end of the ark. During thetrimming oper ation the lever 112 is swung toward the .eft (Fig. 1) to actuate the jack to advance the marginal portion of the shoe past the cutting tool. The lever 112 is pivoted at 115 on the frame and is actuated in the above manner by mechanism comprising a bell crank lever 11G pivotally connected with the feeding lever and pivotally supported by a hanger 118. The hanger in turn is pivot-ally supported by a lever which will be hereinafter termed the fulcrum carrying lever. The lever 11c swung about the pivotal connection between the hanger 118 and the fulcrum carrying lever to actuate the feeding lever during the operation of/the machine by mechanism comprising a lever .122 connected with the lever 116, a bell crank cam lever 124 and a link 126 connecting the cam lever with the lever 122. The cam lever carries a cam roll 12S arranged to engage a cam on the cam disk 79.

The proper trimming of the edge of a shoe sole usually requires the use of a dift ll in trimming the shank.

ferent type of cutter for trimming the forepart of the sole from that which is employed In the present machine the cutter 14 is especially constructed for trimming the forepart of the shoe sole, while the cutter 16 is especially constructed for trimming the shank. To enable the

cutters

14 and 16 to be moved alternatively into position to trim the sole edge without shifting the position of the jacked shoe or while the shoe remains in operating position with the table 24 engaged in the crease between the upper and the sole edge, mechanism is provided for adjusting the cutter shaft to shiftthe position of the lower end thereof both vertically and horizontally. The vertical movement brings one or the other of the

cutters

14 and 16 into operating position, while the horizontal movement compensates for the difference in diameter of the cutters. In the construction shown the carriage 6 is eccentrically mounted in a hearing in a supporting ring 130, which in turn is adjustably mounted to rotate in a bearing formed by arms 131 on the frame of the ma chine To prevent the carriage 6 from turning with the ring 130 and to give certain movements to the cutter shaft during the adjustment of the ring, the carriage is connected with the frame by means of a link 132. To enable the supporting ring 130 to be turned readily, an operating handle 133 is secured thereto.

Then the edge trimming operation is started along the shank of a shoe the ring 180 is located in the position shown in Fig. 5, and the cutter 16 is placed in operating position as shown in this figure. When the forepart of the shoe sole is reached the ring 130" is shifted into the position shown in Fig. 4. During this movement of the ring a movement is imparted to the cutter shaft carriage, by virtue of its eccentric mounting,

- which shifts the lower end of the shaft in a direction perpendicular to the plane of the shoe sole and also in a direction parallel with said plane away from the central portion of the sole to place the cutter 14 in operating position. hen the shank of the shoe is reached in trimming the last side of the shoe. the ring 130 is turned back to the position shown in F 5 thereby adjusting the cutter shaft in a manner reverse to that of the shoe through the adjustment of the feeding lever. The mechanism for locking the lever 120 in position during the trimming operation comprises a rod 467 pivotally connected at one end with the lever and passing through a pivoted sleeve 468, and a pair of locking levers 470 pivoted to the sleeve and formed with cam-shaped inner ends arranged to engage the rod 467. The outer extremities of the locking levers carry pins 472 entering slots formed in the opposite ends of a cross-bar 473, to the central part of which is pivotally connected a rod 476, preferably including yieldable sections. The rod 476 is joined to the starting treadle of the machine through connections which are arranged to move the rod longitudinally to the right (Fig. 3) and thereby actuate the levers 470 to lock the rod 467 in the sleeve 468 upon starting the machine, and therefore the lever 120 in position. The release of the treadle and reverse movement of the rod 476 free the rod 467. I

The adjustment of the fulcrum of the lever 116 will time relatively the action of the jack actuating feeding mechanism and the position changing mechanism in accordance with the size of the shoe to be operated upon. With a constant speed of rotation of the pattern cam shaft 48 the adjustment of the fulcrum of the lever 116 would result in variations in the rate of feed of the shoe for differentsizes. It is preferred that the shoe shall be fed at a substantially uniform rate regardless of size, and in the present machine the speed of the pattern cam shaft is adjusted in accordance with the size of the shoe to secure a substantially uniform rate of feed. The adjustment of the fulcrum carrying lever produced upon the placing of the shoe in starting position, through a connection, which will later be identified, between said lever and the driving mechanism for the pattern cam shaft, will adjust the speed ofsaid shaft in accordance with the size of the shoe.

The edge trimming cutters may be driven continuously from the electric motor. The driving mechanism for the rest of the machine comprises a driving shaft 135 upon which is mounted a fast pulley 136 and a loose pulley 137. The driving shaft carries a bevel. gear 138 which meshes with a bevel gear 139 mounted on the upper end of avertical countershaft 140. Fixed upon the counter shaft 140 is a disk carrying the driving member 141 of a friction clutch, the driven member of which, indicated at 142, is carried by a sleeve 144 loosely mounted on the countershaft. The sleeve 144 also carries a spiral gear 146 meshing with a spiral gear 148 formed on a sleeve 149 mounted on a horizontal counter shaft 150 to rotate therewith. During the sole trimming operation the

members

141 and 142 of the friction clutch are engaged and the counter-shaft 150 is driven at a speed depending upon the speed of the driving shaft 135.

The pattern camv shaft 48 is driven through a spiral gear 152 journaled on a shaft 154 and meshing with a spiral gear 156 secured to the upper end of the pattern camshaft. The spiral gear 152 is driven through a clutch connection from a bevel gear 158. During the trimming operation the bevel gear 158 is driven through a train of

gears

160, 162, 164, 166 and 168 from a sleeve 170, a ratchet clutch (not shown) being interposed between the gear 166 and he gear 168 to allow the gear 166, under certain conditions, to rotate independently of the gear 168 in the same direction in which it is driven from the latter gear. The sleeve 170 is driven through suitable variable speed transmitting mechanism, not shown in drawing, from a countershaft 17 2 which in turn is driven from the shaft 150 through intermeshiug 17 4 and 176. The mechanism for adjusting the variable speed trans mitting mechanism intermediatethe countershaft'172 and the sleeve 170 is controlled through a link 17 8 from the fulcrum carrying lever 120.

In starting the machine, the circuit of the electric motor having been previously closed so that the trimming cutters are being rotated, the sleeve 144 is elevated by the operator to engage the

members

141 and 142 of the main driving clutch and is held in elevated position by a latch. When a point in the operation of the machine on the shoe is reached at which the operation is to be stopped, this latch is released, the members of the main driving clutch are disengaged and the shaft 150 is stopped by suitable stopping devices.

The mechanism for elevating the sleeve .144 to start the machine comprises a disk 186 mounted on a sleeve 188 and connected through intermeshing gear teeth with a sleeve 1.89 which supports the sleeve 144, a rock shaft 190 mounted in the sleeve 188, connections indicated at 192 including a spring between the sleeve and the rock shaft for turning the sleeve from the rock'shaft, a lock bolt carrier 194 secured to the shaft, a slide 196 mounted in the carrier, a spring 198 acting on the slide, a pin 200 projecting from the slide and engaging in a slot 202 in a fixed bracket, a spring pressed plunger 204 for limiting the movement of the carrier 194, a lever 206 and a link 208 con necting the lever with the slide 196. Fig. 9 shows the parts in the positions which they assume when the machine is at rest. In starting the machine the operator swings the lever 206 downwardly, thereby swinging the carrier 194 in a direction to elevate the sleeve 144 to engage the members of the main driving clutch. The lever 206 is swung downwardly to start the machine by means of a treadle 210 connected with the lever 206 by a treadle rod 212.

During the trimming operation the carrier 194 is held in position to maintain the members of the main driving clutch in engagement by means of a pivoted latch 214 mounted on the lower end of the carrier and arranged to engage a member 216.

The mechansim for disengaging the latch 214 from the catch 216 to stop the trimming operation (see Figs. 14 and 15) comprises an arm 218 mounted to turn loosely on a rock shaft 220, and connected with the latch by a. link 219, an arm 222 secured to the rock shaft and arranged to engage the arm 218, a second arm 224 secured to the rock shaft, a second rock shaft 226, an arm 228 secured thereto,

links

230 and 282 connecting the arm 224 with the arm 228, and an actuating arm 234 secured to the rock shaft 226 and carrying a cam roll 236 arranged to be engaged by cam projections formed in the periphery of the cam disk 7 9. The cam disk 79 is formed with three cam projections indicated respectively at 240, 242 and 244 for engagement with the cam roll 236to swing the arm 234 forwardly and thereby through the connections described to disengage the latch 214 from the catch 216. These cam projections are so placed that the latch will be disengaged from the catch to stop the machine respectively when the forepart of the shoe on the side of the shoe first operated upon is reached, when the shank is reached on the opposite side of the shoe, and when the trimming of the shank on the last side of the shoe is completed.

The sleeve 149 is slidable longitudinally of the shaft 150 and carries the driven memher 246' of a slow speed clutch, forming part of the stopping mechanism. The driving member of the clutch indicated at 248 is mounted to turn on the shaft 150 and is driven at relatively slow speed from the counter-shaft 140 through a train of gears, 250, 252. 254 and 256. The sleeve 149 is normally held in position on the shaft 150 with the members of the slow speed clutch disengaged by means of a spring (not shown). Upon the disengagement of the latch 214 from the catch 216, the members of the main driving clutch are disengaged, and the sleeve 149 is moved longitudinally of the shaft 150 to engage the driven clutch member with the driving clutch member. The slow speed clutch when first engaged acts as a friction brake to slow the shaft 150 down to the speed of the driving member of the clutch, and then acts as a driving clutch to drive the shaft in a forward direction to stopping position. When the shaft arrives at stopping position the sleeve 149 is moved longitudinally of the shaft to disengage the members of the slow speed clutch and the rotation of the shaft is arrested by'a suitable brake.

The mechanism for thus shifting the sleeve 149 comprises an oscillatory lever 258 carrying a cam roll 260engagi-ngin a cam groove 262 in the sleeve 149 and a lock bolt portion 264 projected from the slide 196 and arranged to engage in a recess in the lever 258 to lock the' le'ver to the lock bolt carrier. i/Vhen the machine is running'normally the slide 196 is depressed and the lock bolt portion is disengaged from the recess in the lever 25 8, allowingthe le'verto swingidly. Upon thedi'sengagement of the latch 214 from the catch 216, the slide 196 is elevated by the spring 198 and the'lock-bdlt portion operates to lock the slide to the lever 258. The sleeve 149 is then shifted longitudinally of the shaft 150 'to engage themembers of the slow speed clutch and'the carrier 194 is actuated to 'turnth-e disk 186 to depress the sleeve 189. During the downward anovement of the sleeve 189, said sleeve engages a collar 265 secured in the gear 146 andthe sleeve 144 is'depressed to disengage the members of the main driving clutch. -Whe'n the speed of the shaft 150 has been re'duced' an'd the shaft has been driven forwardly to stopping position, the "sleeve 149 is shifted in the opposite direction to disengage the mem' bers of thes'low speed clutch and the carrier 194 is swung in the opposite direction to en gage the brake.

The brake comprises a brake disk 266 mounted on the shaft-150 to slide longitudinally of the shaft and arranged to engage a disk 268 secured to the shaft. The brake disk is normally held out o'fengagement with the disk 268 by I a suitable spring "(not shown). The brake disk is held from rotation with the "shaft 150 and is actuated to engage the disk268 by means o'f a lever 270 pivoted at 27-2. The mechanism for actuating the lever 270 to engage the brake 'comprises a lever 274' pivoted o'n ashaft 275 and carrying a spring actuated latch '276alrranged to engage-a pin 278 on the slide 196. As the lower'end of the carrier 194 is swung to the left, (-Fig. 9) following the move ment of the sleeve i149to disengage the slow speed clutch, the "pin 278' engages the latch 27 6; the lever 274 is swung with the carrier bringing the hub of the latch 276 into engagement with the lever 270,and*thelever 270 is 'actuated'to engage the brake.

When the machine has been stopped'at'the conclusion of the trimming operation on the last shanlgthe operator inanipul'ates'the jack to disengage the shoe from the machine. Then While holding the jack away' from the machine, the operator throws in a clutch mechanism which operates "to drive the pattern cam shaft 48 'independentlyof the shaft 150 to bring the jack to its initialor starting position. When the pattern can: shaft has described substantially a complete revolution from the'poi nt at which it'stairted atthe beginning ofithe trimming operation, thGIQbXTGStOIi'Dg t/hG .jack to starting position, this clutch mechanism is automatically thrown out of operation. 7

The mechanism for thus driving the ttern cam shaft independently of-the swift 150 to bring the jack to starting posit-ion comprises a roll orHorton olutch, the driving member of whicln'indicated at 280, is secured to-the lowcr' end ofthe shaft 140. This clutch mechanism "also comprises a driven member 282,,clutchrolls 284, a clutch controlling sleeve 286, a clutch engaging spring'288, and a clutch controlling lever 290 for'holdiirg the sleeve 286 in position. The driven member 282 oft-he Horton clutch is connected by 11363418 of clutch dog 291 ivitha shaft 292 to which is secured a bevel gear 293xmeshing with the'bevel gear 158. Thus when the Hortonclutch is thrown into operation, the spiral gear 152 is rotated through the Horton clutch, the clutch dog 291, the shaft 292, andthe bevel gears 293 and 158-to drive thepattern cam shaft 48 independently of the shaft 150. The rat chet clutch intermediate the gears 166and 168 permits this independentmovement of the pattern cam shaft. I

The lever 290 is acted vupon by a spring pressed plirnger 295 which tends to swing'the same in a direction-to throw in the clutch. During the trimming operation the lever 290 is held "in position to maintain the clutch out of operation by-means 'o-f a pivoted latch 294*arranged toengagethe forward end of-a bar 296 connected With-the lever .290. In throwing the roll clutch into operation the operator swings the latch 294 away from the forward endof the bar 296 allowing the plunger 295 to actuate the lever 290 to throw in the clutch. Vhen the pattern cam shaft-has"described substantially a complete rotation from the point at ivhich it-startod at the beginning of the trimming operation. the -bar 296 is actuated to swing the lever 290 back to its initial position, thereby throwing out the clutch. The bar 296 is actuated in this manner by the arm 222 which is arranged to engage V a shoulder on the-bar. The arm 222 ;is swung rear- Wardlyat the proper time to throw out the clutch by means of-a cam roll 298 mounted on'an arm 300 secured tothe rock shaft 226 and aca'mprojection 302 formed on'the cam disk 79 and arranged'to engage saidcam roll.

Although the present invention has been illustrated as'embodied i-nan automatic shoe machine, it isto be understood that certain features of the invention may be applied with advantage to non-automatic machines and that, ncept as defined in the claims, the invention is not limited to any particular class of machines.

In the machine illustrated in the drawing the mechanisms for supporting and actuatingthe jack, the mechanism tending yieldingly to swing the jack toward the rear of the machine, the gage for guiding the shoe, and the mechanism for controlling and tuating the same, the mechanism for actuating the eel: to impart feeding movements to the shoe, the mechanismfor driving the pattern cam shaft 48 during an operation on the shoe, the mechanism for stopping" the machine during or at the completion of an operation on the shoe, the mechanism for driving the pattern cam shaft to restore the jack to starting position and the mechanism for throwing out the latter driving mechanism. With the exception of certain changes pointed out above, have substantially' the same construction, arrangement and mode of operation of parts as the corre sponding mechanisms illustrated and d scribed in applicants pending application previously mentioned.

Having explained the nature and object of the invention, and having specifically de scribed the machine embodying the various features of the invention in their preferred forms, What is claimed is:

1. A machine for operating on shoes having. in combination, means for operating on a shoe comprising two different operating tools arranged to act successively along different parts of the bottom margin of the shoe during a single transfer of the point of operation along said margin, a shoe supporting ack, mechanism acting automatically to change the relative positions of the shoe and the operatingmeans to compensate for the surface and edge curvatures of the shoe sole as the point of operation is transferred along the bottom margin of the shoe. and mechanism for moving relatively the jack and tools at an intermediate point in such transfer to locate the tools interchangeably in operating position with relation to the shoe bottom.

2. A machine for operating on shoes having. in combination, means for operating on a shoe comprising tWo different operating tools arranged to act successively along different parts of the bottom margin of the shoe during a single transfer of the point of operation along said margin, a shoe supporting jack, mechanism acting automaticallv to change the relative positions of the shoe and operating means to compensate for the surface and edge curvatures of the shoe sole as the point of operation is transferred along the bottom margin of the shoe. and means for moving the tools at an intermediate point in such transfer to locate t he same interchangeably in operating position with relation to the shoe bottom.

3. An edge trimming machine having, in combination, an edge trimming cutter, a shoe supporting jack, mechanism for changing the relative positions of the shoe and the trimming cutter to present the shoe properly to the cutter as the point of operation is transferred about the shoe, a movable gage arranged to engage the shoe along a contour having an irregular outline, and automate means for moving the gage to compensate for the irregularities in the outline engaged by the gage so that the shoe sole trimmed to a regular outline.

4. An edge trimming machine having. in combination, an edge trimming cutt r, a shoe supporting jaclr, mechanism for changing vthe relative positions of the shoe and the cutter to present the shoe properly to the cutter as the point of operation is transferred about the shoe, a movable gage for engaging the upper of the shoe along a contour having an irregular outline, and means for moving the gage to compensate for the irregularities in the outline. engaged by the gage so that the sole is trimmed to a regular outline.

5. An edge trimming machine having, in combination, two rotary eoge trimming cutters, means for rotating the cutters, a shoe supporting jack. mechanism for changing the relative positions of the shoe and theoperative cutter to present the shoe properly to the cutter as the point of operation is transferred about the shoe, and means for moving the cutters to locate the same interchangeably in operating position with relation to the shoe sole. 7

6. An edge trimming machine having, in combination, a rotary cutter shaft, means for driving the shaft, two cutters of different forms moimted on the shaft, a shoe supporting jack, mechanism for changing the relative positions of the shoe and the operative cutter to presentthe shoe properly to the cutter as the point of operation is transferred about the shoe, and means for adjusting the shaft to locate the cutters interchangeably in operating position rela tively to the shoe sole.

7 An edge trimming machine havin combination, a rotary cutter shaft, means for driving the shaft, two cutters of dif ferent forms mounted on the shaft, a shoe supportng jack, mechanism for changing; the relative positions of the shoe and the operative cutter to present the shoe properly to the cutter as the point of operation is transferred about the shoe. and means for adjusting the shaft to shift the. cutters in a direction perpendicular to the plane of the shoe sole and also in a direction parallel with said plane toward and from the central portion of the sole to locate the cutters interchangeably in operating position.

8. An edge trimming machine having, in