US2081961A

US2081961A - Shoe sole fitting machine

Info

Publication number: US2081961A
Application number: US39716A
Authority: US
Inventors: Ernest W Stacey
Original assignee: United Shoe Machinery Corp
Current assignee: United Shoe Machinery Corp
Priority date: 1935-09-09
Filing date: 1935-09-09
Publication date: 1937-06-01
Anticipated expiration: 1954-06-01
Also published as: DK58025C; DE677947C; GB482999A

Description

June l, 1937. E' W- STACEY 2,081,961

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SHOE SOLE FITTING MACHINE Filed Sept. 9, 1955 8 Sheets-Sheet 2 x MVM/TUR.

---------------- MM/f6@ @5p/Lf 'June 1, 1937. E' Wl STACEY SHOE SOLE FITTING MACHINE Filed Sept. 9, 1935 8 Sheets-Sheet 3 I l l l MN5/v70@ ZM y June l, 1937.

E. W. STACEY SHOE SOLE FITTING MACHINE Filed Sept. 9, 1935 Tig. 5.

8 Sheets-Sheet 4 13e 19a is 1 116 18o I 126 184 13a 118 12520 1416 54 175 m 739 gl f l 130 i H0 20986 i 168 i g i E 141] i 368 176 1423 17o' 145 726 128* I I 1 @J m- 1414 M2 mv 160 17s/ wfaz Tigl.

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/NVfA/TUR Jun 1, 1937. E. W. sTACEY SHOE SOLE FITTING MACHINE Filed Sept. 9, 1935 8 Sheets-Sheet 5 /NVfA/m/Q June l, 1937.

E. w. sTAcEY sHoE som: FITTING MACHINE 8 Sheets-Sheet 6 Filed Sept. 9, 1935 S/ML E. w. STAG EY June l, 1937.

SHOE SOLE FITTING MACHINE Filed Sept. 9, 1935 8 Sheets-Sheet 7 "lub Jun l, 1937. E. w. sTAcl-:Y

SHOE SOLE FITTING MACHINE Filed Sept. 9, 1935 8 Sheets-Sheet 8 1 :www

@ 9@ www Patented June l, 1937 NETE STATES 'r reine AT t SHOE. SOLE FITTING MACHINE Application September 9, 1935, Serial No. 39,716

14 Claims.

This invention relates to shoe sole tting machines and is herein shown and described as embodied in a machine arranged to receive and perform a series of operations upon a sole blank,

i either a block sole or a slightly oversized blank died out to approximately the required shape, producing from the blank a sole which is fully prepared for attachment tc a shoe by the cement process.

Although the operations performed by the illustrated machine include rounding, forepart reducshank reducing, roughing and iinal trimming, the invention is not limited in its application to a machine which will perform all of those 'l operations, but includes within its scope improved mechanisms for performing only a part or parts thereof.

In my prior application Serial No. 727,765, filed May 26, 1934, there is disclosed and broadly claimed a machine which, in its entirety, is adapted to perform the above named operations upon a died out sole blank, and the present invention may, in some of its aspects., be regarded as a development of and improvement upon the inve 2.5 tion which is the subject-matter of the said application.

One object of the present invention is to widen the range of utility of such machines as that above referred to, providing a machine which is capable 3o of operating upon block soles as Well as died out blanks, and is capable oi operating all the Way around the sole. To this end a slidable and rotatable sole pattern supporting jack is provided with a cooperating clamping member arranged to hold a sole blank upon the pattern While the jack is rotated through a complete revolution, Without obstructing part of the periphery of the sole from the action oi the cutter or cutters arranged to operate upon it.

As shown, this result is secured by supporting the clamping member separately from the jack and keeping it in register with the pattern by connections, such as gearing or the like, between the clamping .member and the jack.

Another feature of the invention consists in the provision ci control mechanism operating to cause the cutter to be swung into engagement with the sole before the jack starts to turn and then caus- U ing the jackto turn so that the entire periphery of the soie will be operated upon. After the rotation cf the jack is complete, the cutter is retracted to an inoperative position where it will not interfere with the removal of the finished 55 blank.

fi c

A further feature of the invention resides in the provision of a tilting cutter head carrying a pair of cutters and having means for so biasing the head that the cutters engage the blank in succession when the cutter head is moved toward the blank to be operated upon.

The invention also includes a new construction and arrangement whereby the cutter, which is rotary and turns in a direction to cut toward the rear end of the sole, is caused to engage and cut into the edge of the sole at one side of the heel portion thereof, after which the jack is rotated in the direction opposite to the cutting action, causing the entire periphery of the heel portion ci the sole to be traversed past the cutter. This initial engagement of the cutter with the sole as described permits the cutter to cut its Way into the sole with a minimum tendency to buckle the sole because the drag of the cutter is not directly toward the clamping member.

The above and other features of the invention and benefits derived therefrom will be better understood and appreciated from the following detailed description of one embodiment thereof taken in connection with the accompanying drawings, in Which Fig. 1 is a iront View of the machine with parts broken away to show the internal mechanism;

Fig. 2 is a left hand end View, partly in elevation and partly in section;

Fig. 3 is a view of a detail of the cutter driving mechanism;

Fig. 4 is a plan View of the base portion of the machine;

Fig. 5 is a vertical sectional View of the cutter head;

Fig. 6 is a planview of the cutter head;

Fig. 7 is a side elevation of the cutter head;

Fig. 8 is a vertical section of the cutter head biasing device;

Fig. 9 shows the power transmission unit in horizontal section;

Fig. 10 is a plan view of the control unit;

Fig. il is an elevation of the control unit;

Fig. 12 is an enlarged View of a detail of the clamp operating mechanism;

Figs. 13, 14 and 15 show details of the clamp adjusting mechanism, and

Fig. 16 is an angular View of the clutch and cam elements of the control unit.

Referring now to the drawings, and particularly to Figs. 1, 2 and 4, 2li indicates a machine frame or housing the top of which constitutes a table 22 above which the operating mechanisms of the machine are supported, while various driving and ISO control mechanisms are enclosed within the housing beneath the table.

Power is furnished by a motor 24 connected by a belt 25 to a pulley 23 which is keyed upon a shaft 3) (see Fig. 9) extending into`| a case 32 which contains mechanism for transmitting power to the cutting tools which operate upon the work.

Referring now particularly to Fig. 9, the shaft 36 is journaled in ball bearings 31?-, 36 which are supported in the case 32. Keyed to the shaft 3|) near its inner end is a spiral gear 38 meshing with a similar spiral gear lli keyed upon a vertical shaft 42 journaled in bearings 44, M5 (see Fig. l) which are mounted in a stationary upright sleeve d8 secured in the table 22 by a bolt 53. The shaft l2 serves to transmit power to a pair of rotary tools through further mechanism which will be described in detail hereinafter.

Also meshing with the driven spiral gear is@ is another spiral gear 52 secured upon a horizontal shaft 543 journaled in

bearings

58, 58 in the case 32 and arranged parallel to the shaft d. The shaft dll which is thus driven by the shaft 42 also carries a spiral pinion 68 which meshes with a spiral gear 52 (see Fig. l) upon a horizontal shaft 64 extending from front to rear of the case 32 and having at its rear end a pinion 66 which meshes with an internal gear E58. The gear 68 has secured upon its rear face an eccentric 1Q and is rotatably mounted upon a '.dxed stud 'l2 extending rearwardly from the case 32.

It will be apparent that whenever the motor 24 is running the shaft l2 will be in rotation and will be driving the eccentric i2.

The eccentric 'lil is surrounded by an eccentric strap 'i4 (Figs. 4 and 9) upon one end of a connecting rod 16, the other end of which is pivotally connected at 18 to a reciprocable rack 3! (Fig. 11') which is guided for horizontal movement in a control unit which will be described hereinafter'.

The right hand end of the shaft 54, as seen in Fig. 9, projects from the case 32 and is squared as shown at 82 for the reception of a hand crank by which the mechanism of the machine may be turned over manually when desired.

At the upper end of the shaft 42 is secured a skew gear 84 which meshes with a gear 85 secured to an inclined shaft 8B the lower end of which runs in a bearing d@ supported in a hollow arm 92 which is integral with a hollow post 94 mounted to oscillate about a vertical t axis and journaled for that purpose upon the upright sleeve 48. The post 94 is flanged at its lower end 93, the flange resting upon the table 22 and being held down to the table by gibs 88, idd (Figs. l and 4).

As a result of the construction just described, the upper end of the hollow arm S2 is able to swing through a considerable arc around the axis of the shaft [52. The said upper end of the arm 92 carries a forwardly extending hollow bracket |il2 (Figs. 2 and 3) from which is supported a depending cutter head. J ournaled upon ball bearings HM, H3G within the bracket H52 are a pair of gears li, Hd which are rigidly connected together by a sleeve M2. The upper gear M38 meshes with a skew gear secured to the upper end of the inclined shaft 82 and the lower gear il@ meshes with a gear Il@ at the upper end of a short shaft lit arranged to turn about a vertical axis in bearings l2@ and carrying at its lower end a pinion |22 (see Figs. 3 and 5). The bearings l2@ for the shaft lid are supported by av retainer |24 engaged in a groove in the depending portion of the bracket and the gear |22 upon the lower end of the shaft is the main driving gear for a pair of rotary tools |26 and |28 which perform rounding, shank reducing and roughing, edge trimming and forepart reducing and roughing operations upon the work.

The tocl |26 is mounted upon the lower end of a vertical shaft E3B (see Fig. 5) which is suspended for rotation in a ball bearing |32 carrie-d by a slide |34. (Figs. 5, 5 and 7) guided for limited vertical movement in the cutter head casing E36 and supported by a compression spring |33. The shaft |39 is continuously rotated by a gear lili) which meshes with, and is driven by, the gear |22. The gear |40 is mounted upon, and keyed to, a sleeve Ml which runs in bearings l. The shaft |32 is slidable vertically through the rotating sleeve but is caused to rotate with the sleeve by splines |515 connecting the shaft and sleeve.

The tool 525 comprises toothed shank reducing and roughing blades |42 and a rounding cutter les which operate upon the sole blank in the same manner as the corresponding elements in the machine disclosed in my prior application. The vertical movement of the tool 1126 to throw the reducing and roughing blades |22 into or out of operation while permitting the rounding cutter |26 to continue to operate upon the solo edge is effected by a bell crank lever of which the horizontal rm |45 engages in a notch in the slide i3d and the Vertical arm M8 is operated around the pivot |50 by a slide carrying a guide .roll which engages and is controlled by the pattern or templet upon which the sole is clamped, substantially las in my said prior application. For the purpose of adjusting the throw of the bell crank lever arm |55 the arm |23 is made in two parts connected together by an adjusting screw 52 provided with a convenient knob iiifl the hub of which is engaged by a detent E56.

The lower end of the lever arm lllil engages the rear end of a slide led which carries at its front end the guide roll i@ arranged to engage the sole pattern and be actuated thereby. Boneath the roll l5@ is a gage ll carried by an adjustable slide 53 arranged to be secured in adjusted position by a set screw |55. rhis gage, contacting with the edge of the pattern 272, determines the line to which the cutter |fll shall round the sole lank.

Also meshing with the driving gear |22 is a second driven gear |52 which is keyed to a sleeve |64 running in bearings it. Slidable vertically through this sleeve is a shaft |28 constrained by splines l'l to rotate with the sleeve and carrying at its lower end the sole edge trimming cutter H2. The forepart reducing and roughing blades |713 of the tool |28 are carried by the sleeve ltd whose bearings |65 are mounted in a vertically adjustable slide l'l, while the edge trimming cutter shaft |58 is supported by a bearing |18 which is mounted in a vertically adjustable slide |80.

Similarly, vertical adjustment of the shaft |68 and the cutter |12 is effected by a nut |96 threaded upon a screw |98 arising from the slide |80, and either adjustment may be changed independently of the other. The face of the slide |86 is visible through a window opening 200 in the wall of the casing |36 and may be graduated to indicate cutter settings for sole blanks of different thicknesses.

Mounted upon an adjustable slide |61 secured in position by a set screw |69 beneath the cutters |12 and |14 is a guide roll having a portion |1| arranged to run against the edge of the pattern to determinethe depth of cut of the edge trimming cutter |12, and a portion |13 of larger diameter which runs in a groove around the forepart and heel portions of the pattern but in the shank portion, where there is no groove in the edge of the pattern, causes the cutter head to be tilted just sufficiently to render this cutter inoperative upon the shank portion of the sole blank.

The swinging of the post 94 and the cutter head carrying arm 92 in a' counterclockwise direction in order to advance the cutter toward the work is accomplished by a large compression spring 222, Fig. 4, surrounding a guide rod 224, one end of which is pivoted to an arm 226 affixed to a vertical rock shaft 228. The other end of the rod and spring enter a bushing 230 which ,is threaded through the machine housing and provided with an external knob 232 for turning the bushing to adjust the tension upon the spring.

To the upper end ,of the rock shaft 228 is affixed a rocker arm 234 connected by a link 236 to an arm 238 projecting from the rear side of the post 94. With the connections as described, the expansive force of the spring 222 tends to swing the post and the cutter head arm carried thereby in a direction to move the cutter head toward the work and does so unless the arm carrying the cutter head is forcibly retracted against the expansive effort of the spring.

The sole blank to be operated upon, designated in Figs. 1 and 2 by the numeral 240, is clamped in a jack and rotated past the tools in substantially the same manner as in the machine of my prior application except that in the present machine the blank is placed on top of the wooden supporting pattern and faces upward instead of being placed against the under side of the pattern and facing downward, as in the earlier machine.

Power for rotating the jack is derived from a pulley 242, integral with the pulley 28 which is belted to the motor. The pulley 242 is belted to a pulley 244' (Figs. 1 and 4) which is loose upon a worm shaft 246 carrying a worm 248, but is capable of being placed in driving connection with said shaft by means of a clutch 250 capable of being shifted axially of the shaft and having at one side a friction facing 252 for engaging the pulley 244 and at the other side a friction facing 254 for alternatively engaging a stationary disk 256 tvo act as a brake to stop rotation of the worm shaft.

The worm 248 meshes with a worm gear 258 (Fig. 2) which is keyed to a shaft 260 having at its rear end a bevel pinion 262 meshing with a bevel gear 264 affixed to .the lower end of a vertical shaft 266 which passes upward through the table 22 and carries at its upper end a gear 268 for driving the internal elliptical rack 269 by which the jack is rotated in substantially the same manner as in the machine of my previous application.

The sole blank to be operated upon is placed upon a wooden pattern 212 having its edge grooved'around the forepart as shown at 213 and around the heel end as shown at 215. The pattern rests upon two supporting posts 214 carried by a rotary jack table 216 to the under side of which is attached a gear 218. Meshing with the gear 218 is an idle gear 280 which in turn meshes with a gear 282 affixed to the lower end of a vertical shaft 284 journaled in bearings in a hollow upright clamp support 286 which is part of a C-shaped casting in the base portion 281 of which the-jack table 216 may rotate. The upper, overhanging, portion of this casting carries the work clamping mechanism and the support 286 is entirely outside of the jack and is movable relatively thereto. At the upper end of the shaft 284 is secured a gear 288 which is connected through a series of idle gears 290 to a gear 294 through which passes a clamp supporting shaft 296. The shaft 296 is constrained to rotate with the gear 294 but is freely slidable vertically through said gear and is provided at j,

shaft when the spring 306 is compressed and the lever is rocked.

The construction just described lpermits the work to be rotated through a complete revolution with the periphery of the pattern 212 unobstructed and, consequently, enables the cutters to operate all the way around the sole blank, including the heel end. This was impossible with the machine of my prior application, in which a cam at the heel end of the pattern was employed to guide the cutters into the sole blank at one side of the heel portion and out of it at the other side so that the heel end of the blank could not be operated upon.

The lower end of the shaft 296 carries a horizontal cross-head 3|2 (Figs. 13, 14 and 15) upon which are mounted slides 3|4 and 3|6 carrying respectively the forepart and heel clamping posts 3|8 and 320. The slides 3|4 and 3|6 are arranged for adjustment toward or from each other to accommodate work of different lengths by a right Aand left screw 322, 324 threaded through

nuts

326 and 328 upon the respective slides and having its central portion journaled in a bearing 330 to prevent endwise movement of the screw.

At the center of the screw is a spiral gear 332 which meshes with a gear 334 carried by shaft 336 which also bears a knob 338 by which the adjustment may be performed.

Each of the posts 38, 329 depends from a plate 348 supported on the underside of the slide H4 or 3| 6. The plate 340 is capable of swinging about a pivot pin 342 into either of two angular positions determined by notches 344 one or the other of which is engaged by a spring-pressed detent 346. This permits the work clamping posts to be swung at will into position to accommodate and clamp either right or left soles.

Normally the spring 386 acts to force down the clamping posts 3|8 and 320 to hold the sole blank 240 clamped firmly upon the pattern 212 LLI CFI

during the operation of the machine upon the blank. When it is desired to release the sole and insert another blank the clamping members are raised by depressing a treadie 350 which, through connections now to be described, causes the spring 386 to be compressed and the clamping posts 3l8, 323 to be raised.

The arm 364 is pivotally connected at 352 to a rod 33" which passes downward through the spring 383 and the bracket 308, terminating in a member 356 which is guided for vertical sliding movement by a bolt 360 passing through a slot in it. The lower end of the member 356 is bent at right angles to form a horizontal hook 362. Arranged to overlie and engage the top face of the hook 36s is an elongated plate 364 (Figs. l, 4 and 12) which is axed to the top of a plunger 366 guided for vertical sliding movement through the table The lower end of the plunger 366 is connected by a link 368 to a lever 310 movable about a stationary pivot 312. This lever has a projecting tail portion 314 upon which bears a springpressed plunger 316 which tends to raise the plunger 366.

Mounted in the lever 210 are two

horizontal pins

318 and 380 adapted to be engaged alternatively by a double hook 382 secured to the upper end of a rod 384, the lower end of which is pivoted to the treadle 358 at 386. The treadle rod 384 is surrounded by a compression spring 388 which tends to elevate it and the hook 382.

From the foregoing it will be apparent that when the treadle is depressed the hook 382, en-

gaging one or the other of the

pins

318, 388 will draw down the plunger 366 which, in turn, will pull down the rod 354 and cause the sole clamping members 818, 320 to be raised.

Ordinarily the clamp need be opened only a short distance to permit a sole to be removed and a new blank to be inserted but when it is desired to change patterns it is necessary to lift the clamping posts higher and this is accomplished by swinging the hook member 382 to the right, as viewed in Fig, 12, so that it will engage the pin 330 instead of the pin 318. This is accomplished manually by pulling outward upon a knob 390 which is connected by a rod 392 to the double hook member 382. The rod 392 is surrounded by a compression spring 394 which normally keeps the hook 382 at the left, as seen in Fig. l2, so that it will engage the pin 318. Since the pin 380 is only about half as far from the fulcrum pivot 312 as is the pin 318, it will be obvious that with a given amount of depression of the treadle the clamp will be opened twice as far if the hook 382 engages the pin 386 as it will if the hook engages the pin 318.

The various operating mechanisms already described are controlled and coordinated by a control unit which is best illustrated in Figs. 4, 10, 1l and 16.

Meshing with the rack 80 which, as previously stated, reciprocates continually when the motor 24 is running, is a pinion 396 to which is afxed a disk 398, the gear and disk constituting a unit which is mounted to rotate loosely upon a vertical shaft 489 journaled in

bearings

402, 484 formed in a controller housing 436 which is located in the left rear corner of the machine. as seen in Fig. 4, beneath the table 22. By reason of the permanent engagement of the gear 396 with the rack 80 the disk 398 is kept in continual oscillation.

Referring to Fig. 16, a pawl 408 is inserted in the top of the disk 398, being normally pressed upward above the surface of the disk by a spring 4|0. Loosely disposed upon the shaft 400 above the disk 398 is another disk 412 having a downwardly projecting tooth 4|4 arranged to be engaged by the end of the pawl 408. The rear faces of both the pawl 408 and the tooth 4l4 are beveled of so that the disk assembly just described constitutes in eiect a positive one-way clutch.

In order to provide for engagement and disengagement of the clutch the disk 4|2 is slidable vertically upon the shaft 400 and its hub is provided with notches 416 in which are permanently engaged tongues 418 which extend downward from a cam disk 420 xedly secured to the shaft 400 by a pin 422. As a result of this construction it is possible to raise and lower the disk 412 relatively to the shaft 400 but it is impossible for the said disk to turn relatively to the shaft.

For the purpose of raising and lowering the disk 4|2 thereby disengaging and engaging the clutch, the disk is provided with a peripheral groove 424 in which lie the ngers 426 of a horizontal clutch shifting lever 428 which is movable about a stationary pivot 430 and has rigid with it an upright arm 432, connected by a pull spring 433 to the controller box, through which arm the clutch shifting lever is actuated. The lever 428 is forked, as is usual in devices of this kind, and a locking pawl 434 acting under the inuence of a spring 436 isy arranged to engage its rear arm and hold it down, with the tooth 4i4 in a position to be engaged by the pawl 408 and the toe end of the locking pawl in a position to be engaged by a striker 431 which extends upward from the disk 398, see Figs. 10, 11 and 16.

Passing through a hole in the upper end of the arm 432 is a rod 438 surrounded at both sides of the clutch shifter arm by compression springs 440, 442 which are retained respectively by collars 444, 446 secured to the rod 438 by set screws.

The right hand end of the rod 438 is pivotally connected at 448 to the rear end of a lever 458 which is utilized to shift the clutch 250, said lever being movable about a Xed pivot 452. From a brief examination of Figs. 4, 11 and 16 it Will be seen that when the clutch 398, 412 is in a position for engagement the clutch 250 will be disengaged and vice versa.

A cam 454 is secured to the cam disk 420 by a bolt 456 passing through an arcuate slot 458 in the disk, rotary adjustment of the cam relatively to the disk and to the shaft 406 to which the disk is pinned being permitted when the nut 468 upon the bolt 456 is loosened.

The disk 420 has a notch 462 adapted to be engaged by the point of a locking dog 464 movable about a stationary pivot 466 and having a tail portion 468 disposed for engagement by another dog 410 which is secured to a Vertical rock shaft 412 journaled in a stationary upright bearing 414. A spring pressed plunger 416 bearing upon a lug 418 integral with the dog 464 tends to swing the dog into the notch 462.

Secured to the lower end of the rock Shaft 412 is an arm 480 which carries a roll 462 engageable in a recess 484 in the edge of the disk 398. It is only -when the disk 398 is in a position to permit the roll 482 tor enter the recess 484 that the dog 410 can be swung counterclockwise, as seen in Fig. 10, to retract the dog 464 from the notch 462 and permit the cam disk and the cam 454 to turn.

Also secured to the rock shaft 412 is an arm 486 by which the rock shaft is actuated in a manner now to be described.

Referring to Fig. 4, a manually operable knob 488 is carried by a plunger 490 which is mounted` to slide horizontally in a guide hole in the machine housing 20. Pivoted at 492 tol the plunger 490 is a controller bar 494 to the central portion of which is attached a pull spring 496 tending at all times to draw the co-ntroller bar toward the left. A shoulder 498 (see Fig. l0) on the controller bar is arranged to engage a block secured to the end portion of a member 502 pivotally mounted at 504 upona swinging arm 506 which, in turn, is pivoted at 508 to an arm 5w secured to a vertical rock shaft 512 journaled in the table 22. A pull spring 51d, attached, at one end to the arm 506 and at the other end` to a vhook 516 screwed into the machine frame, tends to draw the arm 506 and the rocker arm 510 toward the left to a limit adjustably determined by a stop screw 518. A compression spring 520 between the member 502 and the arm 506 tends to keep those parts in the relation shown in Fig. 10, the arm 506 having a pin 522 which passes slidably through a guide slot 524 in the member 502.

Pivotally mounted at 526 upon the arm 566 is a dog 528 which is urged to turn in a counterclockwise direction by a spring pressed plunger 530 but may be held against the action of said plunger by a locking pawl 532 held in a notch in the dog by a spring pressed plunger 534 and having a tail portion 536 which bears against a Y flat surface 538 upon the member 562. The arm 506 and the member 502 carried thereby are drawn rearward around the pivot 566 by a pull spring 540 which is attached to the controller box at 542.

Projecting from the right hand .end of the arm 506 is a slide 544 which is backed up by a spring 546 in such a manner as to permit the slide to yield toward the left a short distance into the end of the arm. The slide 544 is shouldered at 548, ythe shoulder being arranged `to engage a block 550 secured to the clutch sluiting lever 450.

. The dog 528 is arranged at the Same level as the cam 454 and swings into position to be engaged by the said cam when the locking pawl 532 releases it. Extending upward from the dog 523 `is a lug 552 which, at a certain Stage in the operation ofV the mechanism, engages a finger 554 which is adjustably secured upon thevface ofthe controller box by a bolt 556. The function of the iinger 554 is to reset the dog 528 at the proper time, as will be described hereinafter.

The upper end of the shaft 406 is diametrically slotted at 558 to receive a tongue 566 (see Figs. 2 and 8) formed upon the lower end or a shaft 562 to the upper end of which is secured a drum 564. A strap 566 is wound around the drum, having one of its ends connected to the drum by a bolt 568 and its other end connected to the cutter head carrier at 510. A relatively light torsion spring 512 Asurrounding the shaft 562 maintains sulient tension upon the strap 556 to keep the cutter head biased to a position in which an abutment 514 upon the cutter head engages a stop plug 516 mounted in the swinging cutter head arm 92 except when the cutters are operating uponfthe work. Y

Extending downward from the gear 218 is an enlarged jack base 518 which is generally elliptical in shape. A vertical surface 580 is formed upon the jack base parallel to the pitch line. of

the internal rack 269 and spaced outward somewhat therefrom.

The surface 580 bears against, and is guided in its movement by, a guide bar 582 which is bolted upon the table 22 and the space between the guiding face of the bar 562 and the pitch line of the jack driving gear 268 is substantially the same as the distance between the pitch line of the internal gear 265 and the surface 560, so that as the gear 268 rotates the surface 580 is always held in engagement with the face of the guide bar 582.

Secured tothe under side of the jack base 518 are parallel grooved guides 584 which. are arranged to slide upon tongues projecting from the side edges or" avhcrizontal guide plate 566 upon the upper end of an easily rotatable sleeve 538 journaled in the table 22 to turn about a vertical axis which is oiset somewhat from the axis of the jack-driving gear shaft 266 which passes through the sleeve.

As a result of the construction just described the jack is able to move in a straight line parallel to the guide bar 582 and to swing in semi-circles to which the guide bar is tangent. This manner of rotating the jack and the resulting movement z..

straight-line movement parallel to the guide bar f i;

582 and held down by gibs 594 bolted to the table v 22. It will be noted that the plate 364 which overlies the hook 662 has its edge extended in a line parallel to the gibs 564 and is consequently adapted to engage the hook at any point in the sliding movement of the clamp frame by which the hook is carried. It will be seen also that, by reason of the geared connection between the jack `table 216 and the clamping posts 318, 320, the clamp is constrained to turn with the jack table and remain in register therewith regardless of the sliding and turning movements imparted tothe jack;

Secured tothe side of the jack base is a block 596 the function of which is to stop the jack automatically when it has made a complete revolution. One end of this block is arranged to engage a dogr508 mounted at the upper end .of the rock shaft 512 and arranged to be angularly adjusted about the axis of the shaft by means of two

screws

600, 602 threaded through the dog and bearing against opposite sides of a pin 604 mounted in a disk secured to the shaft by a taper pin 668. It will be apparent from Fig. l0 that when the block 595 strikes the dog 598 the rock shaft will be turned, moving the swinging arm 506 toward the right and actuating the clutch-shifting lever 450 to disengage the clutch 256 through which the jack is driven.

In the operation ofthe machine the motor 24 runs continuously, keep-ing the

cutters

126 and 128 rotating at high speed and, through the

planetary gearing

66, 68 and the connecting rod 16, causing the rack to reciprocate and the disk 398 in the control unit to oscillate. Although the disk 412 isA held down and the one-way clutch 468, 414 is in condition for engagement, nothing occurs because the vertical shaft 400 is locked by the pawl 464 in position to hold the cutterhead back against the stop 516 with the spring 222 compressed, the extent of movement of the pawl 488 being no more than suicient to take up the lost motion between it and the tooth 4M when the shaft liii is locked in this position. Inasmuch as the clutch shifting lever 28 is down, the jack driving clutch is disengaged and the brake is set so that the jack is held stationary, the block 5% upon the jack base being in engagement with the dog 598, as shown in Fig. l0.

The operator depresses the treadle 350, raising the sole clamping members Slt, 32E), and places a sole blank upon the pattern 272 beneath them. The treadle is then released, permitting the spring to depress the clamp to hold the sole blank securely upon the upper face of the pattern. Everything is now in readiness for the operation upon the sole blank to begin.

The operator now pushes upon the knob 488 which, however, cannot be moved inward until the recess 481-5 in the periphery oi the oscillating disk 398 reaches the position shown in Fig. 1G. When this occurs the roll can enter the recess and the member 592 is permitted to swing about the pivot Sii-l at the same time that the locking pawl 464 is'retracted from the notch 452 to release the disk 323. When the disk 42@ is released the strap 566 is permitted to unwind from the drum 564 at the upper end oi the shaft 562 under the force exerted by the spring fi22, tending to swing the cutter arm 92 toward the jack.

Inasmuch as the torsion spring 572 is light relatively to the spring 222 it merely keeps the strap 565 under sufficient tension to hold the abutment 5M against the stop plug 5S? and thus keep the cutter head so biased that as it swings toward the sole blank the cutter E25 will engage and operate upon the blank before the cutter |28. The result of this is that the rounding cutter |44 rst cuts into the edge of the sole blank to the full depth permitted by the gage i ci and the continued swinging movement of the cutter arm 92 then tilts the cutter head around the axis of the shaft M8 to bring the cutter G28 into operative engagement with the work. All of this occurs before the jack starts to move.

During the rotation of the shaft 451i?, which permits the cutters to be swung into engagement with the work, the cam 454 engages the dog 528, which has become unlocked when the swinging of the member 5d?! turned the locking pawl 532 and has been swung by the plunger 53D into position to be engaged by the cam, and swings the arm 535 about the pivot 5ta suihciently to disengage the shoulder 548 from the block 55S and permit the spring 5135 to project the slide 5M a short distance toward the right beneath the block il. This unlocks the clutch shifting lever 45B. Now, when the striker @3l reaches the pawl 1334i and disengages it from the lever 2S the arm 832 is thrown toward the left by the spring 433, raising the disk M2 and, through the rod 438, causing the lever 55 to be shifted about the pivot 352 in the direction to engage the clutch 25@ with the rotating pulley 244i.

Engagement oi the clutch 258 results in the application of power to the jack, causing it to slide and turn through one complete revolution to traverse the entire periphery of the pattern 212, with the sole clamped upon it, past the cutters. IIhe movement of the jack is in a counterclockwise direction, as viewed in plan, and at the beginning of such movement the block 596 swings out of engagement with the disk 59S (see Fig. l0) permitting the spring 5M to draw the arm 5H] back against the stop screw 5l8. This aosipei brings the shoulder 548 to the; left of the block 55D with which the slide 544 is` immediately reengaged by the spring 540, ready to disengage the clutch 25! and stop the jack when it has made a complete revolution, at which time the block 595 again engages the dog 598 moving the arm 506 toward the right.

At the conclusion of the revolution of the jack as above described, the movement of the clutch shifting lever draws the rod 1338 toward the right and, through the

lever arms

432 and 428, lowers the disk i2 tc a position where it is immediately locked by the pawl i. Y Now, after the jack has stopped, the pawl i523 in the rotating disk 398 picks up the tooth I4 upon the disk H2 and causes the shaft 450 to be rotated positively in a counterclockwise direction to rewind the strap 565 and thusv to retract the cutters to inoperative position.

The movement of the arm 535 toward the stop screw 5l8 when the block 595 left the dog 5228 caused the lug 552 to engage the end of the finger 551i and reset the dog 528 so that when the jack has again stopped and the cutters have been retracted to inoperative position the control mechanism has all been reset to the condition shown in Fig. l0, ready for the operation of the machine upon the next sole blank.

It will be seen that the position of the jack when it is at rest is such that the toe end oi the sole is pointing toward the left and the sole is in such a position that when the cutter I 44 is swung toward it` the cutter will engage the sole at the right hand side of the heel portion thereof. the cutter rotates in a direction to cause it to cut toward the rear end oi the sole. The direction of rotation of the jack is 'opposite to this cutting action and the drag of the cutter as it enters the sole blank and starts to cut around the heel end thereof is somewhat away from the heel clamping member 32d rather than toward said member, thus minimizing any tendency to cause the sole to buckle. This is especially desirable in the case of a block sole blank in which there is an excessive amount of material to be removed around the heel portion.

Having described the invention, what is claimed as new and desired to be secured by Letters Patent of the United States is:

1. In a machine for operating upon soles, a jack mounted for sliding and rotative movement through a complete revolution to traverse the entire periphery of a sole supported by the jack past an operating point, a rotary cutter mounted to swing toward and away from said operating point, means for continuously rotating the cutter, means for rotating the and means for swinging the rotating cutter to the operating point and holding it in engagement with the sole throughout a complete revolution thereof.

2. In a machine for operating upon soles, a jack mounted for sliding and rotative movement, means for turning the jack through a complete revolution, a rotary cutter mounted to swing from an inoperative position to an operative position in engagement with a sole upon the jack, means for continuously rotating the cutter, means operative while the jack is stationary to swing the. rotating cutter into engagement with the sole, and means for thereafter causing said turning of the jack through a complete revolution while the cutter is in engagement with the sole.

3. In a machine for operating upon soles, a

As indicated by the arrow in Fig. 6,

cutter, a jack mounted for sliding and rotative movement through a complete revolution to traverse the entire periphery of a sole supported by the jack past the cutter, means on the jack for supporting a sole pattern, a rotatable clamping member for holding a sole against the pattern, a support outside of the jack for said clamping member, and means carried by the support for maintaining the clamping member in register with the sole pattern when the jack is rotated.

4. In a machine for operating upon soles, a rotatab-le jack, means on the jack for supporting a sole pattern, a movable, rotatable clamping member for holding a sole against the pattern, a bodily movable support for sustaining the clamping member which support is outside of, and movable relatively to, the jack, and means operating through said support to maintain the clamping member in register with the sole pattern when the jack is rotated.

5. In a machine for operating upon soles, a jack mounted for sliding and rotative movement, means on the jack for supporting a sole pattern, a rotatable clamping member for holding a sole against the pattern, a slidable support outside of the jack in which the rotatable clamping member is mounted, and means carried by said support for maintaining the clamping member in register with the sole pattern regardless of the position of the jack.

6. In a machine for operating upon soles, a rotatable jack, means on the jack for supporting a sole pattern, a rotatable clamping member for holding a sole against the pattern, a slidable clamping member support having a base within which the jack rotates, connections between the jack and the clamping member for preserving a fixed angular relation between them when the jack is rotated, and means for simultaneously 40 imparting sliding movement to the clamping member support and causing rotation of the jack therein.

7. In a machine for operating upon soles, a movable sole clamp support having an elongated 45 base, a jack mounted for rotation in one end of said base, the other end of said base being guided for sliding movement, means on the jack for supporting a sole pattern, a rotatable clamping member sustained by said clamp support in register with the pattern, and means for imparting to the jack rotative movement relative to the clamp support base and sliding movement in the direction of the sliding movement of said base.

8. In a machine of the character described, a slidable jack, a correspondingly slidable clamp for clamping work upon the jack, a treadle operated actuator forretracting the clamp, and a slidable connection between the actuator and the clamp, whereby the clamp may be operated in any position.

9. In a machine of the character described, a work supporting jack, a spring actuated clamping member for clamping work upon the jack, manu- 10. In a machine for operating upon soles, ay

sole pattern, a cutter arm mounted to swing toward and away from the sole pattern, a tilting cutter head carried by said arm, two cutters cai'- ried by said head, and means for so biasing the cutter head that the cutters will successively engage a sole upon the pattern when the cutter arm is swung toward the pattern.

ll. In a machine for operating upon soles, a soie supporting jack, a cutter arm mounted to swing toward and away from a sole upon the jack, yielding means tending to swing the arm toward the sole, a tilting cutter head carried by the arm, two cutters arranged side by side upon said head, and tension means acting in opposition to said yielding means so to bias the cutter head that the cutters will successively engage the sole when the arm is swung toward the sole.

i2. In a machine for operating upon soles, a sole supporting jack, a cutter arm mounted to swing toward and from a sole upon the jack, spring means tending to swing the arm toward the sole, a tilting cutter head carried by the arm,

tension means acting in opposition to said spring means to bias the cutter head relatively to the sole, and means for exerting sunicient pull upon said tension means to withdraw the arm and cutters entirely from the sole.

i3. In a machine for operating upon soles, a jack mounted for sliding and rotative movement, means on the jack for supporting a sole pattern, a swinging cutter carrier, a cutter on said carrier arranged to operate upon the edge of a sole held upon said pattern, means for holding the cutter away from the pattern, mechanism for swinging the cutter to the edge of the pattern, mechanism for moving the jack to traverse the periphery of pattern past the cutter, and control mechanism constructed and arranged to prevent movement of the jack before the cutter has been swung to the edge oi the pattern.

11i. In a machine for operating upon soles, a rotatable jack, means upon the jack for supporting a sole pattern, a clamping member for holding the heel portion of a sole against the pattern, a rotary cutter carriedby a swinging support and adapted to cut into the edge of the sole at one side of the heel portion thereof, means for rotating the cutter in a direction to cause it to cut toward the rear end of the sole,

means for swinging the cutter into engagement with the sole while the jack is stationary, and means for thereafter rotating the jack in the direction opposite to its cutting action to cause the entire periphery of the heel end of the sole to be traversed past the cutter.

ERNEST W. STACEY.