US2315548A - Machine for operating upon work - Google Patents

Description

April 6, 1943. A. R. SCHOENKY MACHINE FOR OPERATING UPON WORK Filed Jan. 2, 1941 14 Sheets-Sheet 1 April 6, 1943. A. R. SCHOENKY MACHINE FOR OPERATING UPON WORK Filed Jan. 2, 1941 14 Sheets-Sheet 2 April 1943- A. R. SCHOENKY 2,315,548

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MACHINE FOR OPERATING UPON WORK Filed Jan. 2, 1941 14 Sheets-Sheet 5 April 6, 1943. :A. R. SCHOENKY MACHINE FOR OPERATING UPON WORK Filed Jan. 2, 1941 14 Sheets-Sheet 6 igll.

' April 6, 1943.

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MACHINE FOR OPERATING UPON WORK Filed Jan. 2, 1941 14 Sheets-Sheet 7 722% April 6, 1943.

A. R. SCHOENKY MACHINE FOR OPERATING UPON WORK Filed Jan. 2, 1941- 14, Sheets-Sheet 8.

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April 6, 1943- A. R. SCHOENKY MACHINE FOR OPERATING UPON WORK Filed Jan. 2, 1941 14 Sheets-Sheet 11 April 6, 1943- AR. SCHOENKY MACHINE FOR OPERATING UPON WORK Filed Jan. 2', 1941 14 Sheets-Sheet 12 igc33.

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MACHINE FOR OPERATING" UPON WORK Filed Jan. 2, 1941 14 Sheets-Sheet 13 April 6, 1943. A, R. SCHOENKY 7 2,315,543 MACHINE FOR OPERATING UPON WORK Filed Jan. 2, 1941 14 Sheets-Sheet 14 Fig.3!) I //\/\/E/\/ TUR m5 1 Patented Apr. 6, 1943 UNITED STATES sna s PATENT @FFHCE MAGHEZNE FQR UPERATING UPON WORK Application January 2, 1941, Eerial No. 372,749

41 Claims.

This invention relates to machines for operating upon Work and more particularly to machines for operating upon lasts. The invention is herein illustrated as embodied in a machine of the same general type as that disclosed in Letters Patent of the United States No. 1,938,689 granted December 12, 1933, upon an application of I. C. Buckminster, although it will be understood that the invention in some aspects is not limited to machines of the particular type illustrated or to machines for operating upon lasts.

A machine of the type shown in the abovementioned patent includes in its organization means for positioning a last and for clamping it in predetermined relation to means for operating upon the last comprising one or more, preferably three, drills for drilling three positioning holes in the bottom of the forepart of the last in predetermined relation to one another and to the edge of the last bottom, and three inserting tools for inserting three bushings in the holes drilled in the last to adapt the last for use in practicing the method disclosed in United States Letters Patent No. 1,674,060 granted June 19, 1928, upon an application of A. F. Pym, the positioning holes in the last being utilized with similar holes formed in an insole to position the Work in a shoe machine. Such drilling machines are provided with gaging means, comprising devices arranged to engage the edge of the last bottom at the toe end and at opposite sides of the toe and to position the last in predetermined relation to the drills and inserting tools, and with a support or clamping member arranged by engagement with the top of the forepart of the last to clamp it in the position determined by the gaging means for the operation of the drills and the inserting tools. Power-operated means is provided for rotating the drills and for operating them and the inserting tools alternately to form the holes the last and to insert the bushings, and such machines are usually provided with a hand lever which is movable by the operator to start the power-operation of the machine after the last has been clamped in the position determined by the gaging means. In the use of such machines it has been found that the operator sometimes fails to position the work in engagement with all of the gaging devices or, if the work is propc erly positioned in engagement with all of the gaging devices, the work may he accidentally moved out of engagement with one or more of these devices in the clamping operation. If this occurs, it will result in faulty work, since the three positioning holes will not be formed in the last in the definitely predetermined relation to the edge of its bottom face required in carrying out the method disclosed in the above-mentioned Letters Patent No. 1,674,066.

In view of the above, it is an object of the present invention to provide in a machine of the above-mentioned type means enabling the operator to start the power operation of the machine only when the Work has been clamped by the support in the position determined by all of the gaging devices, thus rendering the starting of the power operation of the machine dependent upon the work being in the correct position determined by the gaging devices both before and after the clamping operation. For the purpose in view, there is provided, in the construction herein shown, means for locking the usual starting lever of the machine against movement in the direction to start the power operation of the machine, means for operating the support, and means controlled by all the gaging devices and the means for operating the support for releasing the starting lever for movement in that direction. As herein shown, there is pivotally connected to the starting lever a latch arranged by engagement with an abutment to lock the starting lever against movement in the direction to start the machine. An electrical device, herein illustrated as a solenoid, is provided for moving the abutment out of engagement with the latch to release the starting lever. Connected in series in the energizing circuit for the solenoid are a plurality of contact devices associated one with each of the gaging devices and arranged to be closed in response to pressure of the last against the gaging devices. Connected in series with the contact devices associated with the gaging devices is a contact device arranged to be closed after the support has been moved into clamping position. Closure of the contact device associated with the support Will act to close the energizing circuit of the solenoid only if the other contact devices remain closed in response to continued pressure of the last against them, thus insuring that the solenoid will be energized to operate the locking means to r lease the starting lever for movement in the direction to start the machine only when the last is clamped in the position determined by the gaging devices.

In accordance with a further feature, the in-' vention provides novel means for supporting the clamping member positively in any position to which it has been moved to clamp work pieces of.

different sizes in the position determined. by the above-mentioned gaging devices. In the illustrated construction, after the clamping member has been moved into engagement with the work its pressure on the work is increased through the action of spring means which is arranged to be subjected to stress by the continued movement of another member in the direction to move the clamping member into operative position. For supporting the clamping member positively in work-clamping position, there is provided a block which is movable with the clamping member and has formed thereon a series of steps, a second block movable relatively to the first block into engagement with a shoulder separating two of the steps, and means for quickly moving the second block in the direction of movement of the first block into engagement with one of the steps. As herein shown, the second block is carried by a wedge which is released to the action of springoperated means substantially at the time when the clamping member is moved into engagement with the work, the wedge moving relatively to the two blocks after the second block has been moved into engagement with a shoulder on the first block to effect a quick relative movement of approach between the two blocks, thus effectively locking the clamping member positively against movement in a direction away from the work. If the work is accidentally displaced out of engagement with one or more of the above-mentioned gaging devices in the clamping operation, it will be necessary for the operator to unlock the clamping member and to reposition the work, and for this purpose there is provided, in accordance with a further feature, means enabling the operator at will to operate the wedge to release the clamping member either manually or by power through theaction of fluid-operated means. As herein illustrated, there is provided also automatic means for thus operating the wedge in the normal operation with the machine substantially at the end of its cycle.

The above and other features of the invention,

including various novel details of construction U and combinations of parts will now be more particularly described by reference to the accompanying drawings and pointed out in the claims.

In the drawings:

Fig. l is a viewin front elevation of a machine in which the invention is embodied;

Fig. 2 is a View partly in right-hand side elevation and partly in section of the machine shown in Fig. 1;

Fig. 3 is a plan view on an enlarged scale of the mechanism for adjusting the gaging devices;

Fig. 4 is a view similar to Fig. 3, but with the cover plate for the gaging devices removed to show more clearly the construction thereof;

Fig. 5 is a'section on the line VV of Fig. 1;

Fig. 6 is a Fig. '7 is an enlarged section on the line VI1-VII of Fig. 6;

Fig. 8 is a section on the line VIII-VIII of Fig. 3;

Fig. 9 is a diagram showing the circuit connection for the machine;

Fig. 10 is a view partly in front elevation and partly in section on an enlarged scale of a portion of the machine shown in Fig. 1, illustrating the mechanism for operating the last-clamping member and parts associated therewith;

Fig. 11 is a section on the line XI-XI of Fig. 10;

Fig. 12 is a detailviewoia portion of the mechanism shown in Fig. 11;

section on the line VI-VI of Fig. 4; I

Fig. 13 is a section on the line XIIIXIII of Fig. 10;

Fig. 14 is a section on the line XIV XIV of Fig. 13;

Fig. 15 is a vertical sectional view of an air valve with which the machine is provided;

Fig. 16 is a view in rear elevation of a portion of the mechanism shown in Fig. 2, illustrating the means for controlling the starting lever of the machine with the parts in their initial positions;

Fig. 17 is a similer view but showing the parts in the positions they occupy when the machine is in operation;

Fig. 13 is a section on the line XVIIL-XVIII of Fig. 2;

Fig. 19 is a section on the line XIX-XIX of Fig. 18;

26 is a section on the line XXXX of Fig. 18;

Fig. 21 is a section on the line XXI-XXI of Fig.

22 is a section on the line )QQIXXII of 20,. showing some of the parts of the clutchcontroiling mechanism in their initial starting positions;

Fig. is a similar view but showing the parts the positions they occupy after the clutch has been released;

Fig. is a view partly in front elevation and in section of the mechanism for operating the drills and bushing-inserting tools;

Fig. 25 is a detail view of a portion of the driving connections;

26 is a section on the line XXVI-XXVI of 24;

Fig. 27 is a view in front elevation of a portion of the mechanism shown in Fig. 26;

Fig. 28 is a section on the line XXVIII-XXVIII of Fig. 2'7;

Fig. 29 is a detail plan view of a portion of the top plate of the machine;

Fig. 3G is a section on the line 2QXXXX of Fig. 29;

Fig. 31 is a section on line XXXIXXXI of Fig. 24;

ig. 32 is a section on the line XXXII-XXXII of Fig. 31;

Fig. 33 is an enlarged vertical sectional view of a portion. of the last-drilling means;

Fig. 34 is a section on the line XXXIV-XXXIV of Fig. 24;

Fig. 35 is a section on the line XXXV-XXXV of Fig. 34;

Fig. 36 is a section on the line XXXVI-XXXVI of Fig. 34;

Fig. 37 is a section on the line XXXVII XXXVII of Fig. 3.4;

Fig. 38 is a section on the line XXXVIII- XXXVIII of Fig. 37;

Fig. 35 is a view in side elevation of the bushmg cover;

Fig. 40 is a transverse section of a portion of a last with one of the bushings inserted therein;

Fig. 41 is a detail view of a portion of the mechanism for unlocking the last-clamping member with the parts in the positions they occupy substantially at the time when the clamping member is released; and

Fig. 42 is a similar view but showing the relative positions of some of the parts at a later time in the cycle.

The illustrated machine comprises a base 59 to the upper surface of which is secured by bolts 52 a yoke-shaped bracket 55 which supports mechanism for clamping a last L (Fig. 5) in the position determined by gaging means, hereafter more particularly described, which acts to position the last in predetermined relation to means for drilling a plurality of parallel holes H (Fig. 4) to a predetermined depth in the bottom of the forepart of the last and for inserting bushings B in said holes, as illustrated in Fig. 40. The lastdrilling means, comprising three drills 55 (Fig. 24), and the inserting means, comprising three inserting tools 58, are mounted in the base 50 below the last-positioning and clamping means; and automatic means, more particularly hereinafter referred to, is provided for operating the drills and the inserting tools alternately to drill the holes and to insert the bushings. The gaging means comprises a toe gage 60 (Figs. 4 and 5) for engaging the edge of the bottom face of the last at the toe end, a pair of gages 52, 54 for engaging the edge of the bottom face of the last at the opposite sides of the toe end, and a pair of gages 66, 68 for engaging the edge of the bottom face of the last at the opposite sides at a substantially greater distance from the toe gage 50 than the side gages 52, E4. The toe gage 65 is formed in two parts for purposes more particularly hereinafter explained and comprises a block I secured to the base t and provided with a roughened or corrugated face I2 (Fig. 3) that extends inwardly of the edge of the last bottom at the toe end and inclined downwardly at a slight angle to the horizontal, and a second block or plunger I4 mounted for limited sliding movement on the block it and having its last-engaging face 7 6 inclined rearwardly of the machine at a slight angle to the substantially vertical toe end face of the last. The side gages 65 and 58 are also provided with inwardly and downwardly inclined corrugated faces 18 and with upwardly and outwardly inclined faces Bil. The last-engaging faces lt'i of the side gages 62, 64 are also inclined slightly relatively to the substantially vertical lateral face of the last, the construction being such that the toe and side gages act by engagement with the edge of the last bottom to locate it in a predetermined position longitudinally, laterally, and angularly relatively to the drills 5%, the toe gage $9 and the side gages I56 and 58 also acting to support the lastin predetermined heightwise relation to the drills with the edge of its bottom face in a horizontal plane. As more particularly hereinafter described, the side gages 52, 64, 56 and 6B of each pair are interconnected for simultaneous movement toward or from each. other laterally of the last, and spring means is provided for urging them inwardly toward each other and holding them initially in predetermined positions, spaced apart slightly less than the width of the last to be operated upon. As shown particularly in Fig. 10, the side gages 56 and 58 slidably engage a plate 84 removably mounted at the top or the base 5i]. The plate 84 is located in proper relation on the base 50 by pins 33 and is clamped to the base by straps 85 (Figs. 4 and 24).

For clamping the last in the position determined by the above-mentioned gaging means, there is provided a toe rest 66 (Figs. 5 and which is movable downwardly, by mechanism hereinafter described, from an elevated position into position to engage the top of the forepart of the last, and a member 88 also movable downwardly independently of the toe rest 86 into position to assist in supporting the last by engagement with the top face of the heel end of the last. The toe rest 8% herein shown is substantially like that disclosed in Letters Patent No. 1,957,604c, granted May 8, 1934, on an application of F. N. La Chapelle and accordingly is not shown in detail. Briefly, the toe rest comprises a plurality of small metal rods (Fig. 5) arranged in parallel and contiguous relation, covered by a cap of thin flexible leather and having their upper ends engaging a rubber pad (not shown) which permits them to move relatively to one another in response to pressure of the last thereon and thus to conform to the contour of the top of the forepart of the last, the pins being mounted in a block 92 slidably mounted for limited movement in directions lengthwise of the last in a holder 94, which is rotatably connected to the lower end of a hollow shaft vertically movable in the bracket 54. The hollow shaft 96 is bored to receive a laterally extending pin 98, through which there is threaded a rod IEO having an upwardly extending, oppositely threaded portion I52 extending through a pin IM which projects into slightly elongated slots H36 in the arms of a forked portion I08 of a lever III! fulcrumed at II2 to the bracket 54. Fast to the upper end of the rod I8!) is a hand wheel II I for turning it, and adjustably clamped to the rod I00 within the hollow shaft 96 is a rectangular block I I6 that acts to hold the rod I00 frictionally against turning movement. It will be evident that by turning the hand wheel IN the position of the shaft 96 relatively to the lever I III may be quickly adjusted to vary the heightwise position of the toe rest 85.

At its opposite end the lever I I0 is bored to receive the shank portion II8 of a yoke I2Il, the arms of which straddle a sleeve I22 and are pivotally connected thereto by trunnions I24 (Fig. 10). A pin I26 in the lever IIII, engaging a circumferential groove I28 in the shank II 8, holds the parts in assembled relation while permitting the yoke I20 to turn relatively to the lever Ill]. The sleeve I22 is bored slidably to receive a bushing I30 that surrounds the upper end portion of a rod I32 between the hub of a lever I34, secured to the reduced upper end portion of the rod by a nut I35, and a disc I38 on the rod I32 (Fig. 13). At its lower end the rod I32 has a ball and socket connection I40 (Fig. 2) with the forwardly extending arm of a lever I42 pivoted at I44 to a bracket Hi5 which is secured by screws I48 to the base 50. The lever M2 has a rearwardly extending arm I50 which is connected by a link I52 to a second substantially vertical link I54, pivotally connected at I56 to a bracket I58 secured to the base 55. Also pivotally connected at I56 to the bracket I58 is a treadle I69 which is connected to the above-mentioned link I52 by means of a link I I52. Provision is afforded for applying the toe rest to the last with diiferent degrees of force through the use selectively of one or both of two springs I54, lfifi of which the spring I66 is the heavier. The lower ends of both these springs are supported on a washer I68 (Fig. 10) which rests on a pin il'il that extends through the rod 132. At their upper ends the springs 54, I55 are in engagement respectively with rings I72, H4 which are vertically movable on the rod I32 independently of each other. The rings I'i2 and I'M are held by the springs I 64 and IE6 in engagement with the disc I33, which is provided with three equally spaced elongated slots H5 (Fig. 14.) through which extend three equally spaced pins H8 carried by a ring Isl) that surrounds the bushing I30 below the sleeve I22. At their lower ends swinging movement.

the'pins I78 rest on the ring lid, and formed in the ring" I I2 are three equally spaced recesses I32, which are in alignment with the pins H8 when the ring I35 is in the position shown in Figs. 13 and 14. By turning the ring ifiil the pins H8 may be moved out of alignment with the recesses 182 and into positions in which they will bear on both rings W2 and lit. It will be understood that depression of the treadle mil will first cause the rod I32 and the parts supported thereon to move upwardly as a unit until the lever Hi) has been swung about its pivot H2 far enough to move the toe rest downwardly into engagement with the top of the iorepart of the last, after Which as further upward movement'is imparted to the rod I32 by continued depression of the treadle ifiil, further upward movement is imparted to the sleeve H22 to force the toe rest more firmly against the last, either through the spring N36 or both springs Hit and its selectively.

As the toe rest is thus forced firmly against the top oi the forepart of the last through one or both of the springs W3, Hit, the treadle lfiii will preferably have been depressed far enough to swing the link and the arm iii on the lever Hi2 into substantially parallel relation and, in order to hold the last thus firmly clamped in the position determined by the above-mentioned gaging means, there is provided means for locking the lever iiii positively against reverse This means comprises a block 84 (Fig. which is secured to the lever iii) and has its bottom face provided with a series of steps i355. Slidably mounted on a horizcntal guidsway 588. formed on the bracket 56 directly beneath the block 584! is a wedge i951 provided with an inclined guideway 5922 for a second block Hit the upper face of which for a substantial portion of its length is substantially parallel to the hor zontal guideway I38. Pivotally connected to the wedge I95 is a short upwardly extending arm let carrying a pin I93 that extends inwardly and is held in engagement with the end face 265! of the block 594 by a spring 252 that extends between the arm 5% and a pin in the wedge lQEi (Figs. 10 and 11). A pin 2&5 projecting upwardly from the Wedge [9i] into an elongated slot in the block Hid limits movement of the block relatively to the Wedge in one direction. nected by a link iii! to the upper end of one arm iii?! of a bell crank lever 2M pivotally connected at Eli: to the bracket 55. The bell crank lever a second arm, having a pin and slot connection 2E3 with one arm of a bell crank lever 22d pivoted at 222 to the bracket 54. The bell crank lever 22% has a second downwardly extend ng arm 22 5 between which and a plate fastened to the base 5% there extends a spring that tends to swing the bell crank lever 22% and, through the pin and slot con nection the bell crank lever BM in the direction to move the wedge 5% to the left (Fig. 10). Initially the wedge M39 is held against the resistance of the spring 228 at the extreme righthand end. of the guideway i853 by means of a spring-operated latch 230, which is pivotally connected to the bracket 5%. With the wedge I95 thus held by the latch 23d, downward movement oi the rod 52 to swing the lever H53 in the direction to raise the toe rest is limited by engagement of the block 5% with one of the steps Q85 on the block A spring 232 (Fig. 2), connectod at one end to the base 59 and at the other end to a pin Z-Biprojecting from an ad- The wedge itil is con- 1 justable collar 235 secured to the rod 532, tends normally to impart downward movement to the rod 532 and to hold the block ltd in engagement with the block iii i. The latch 23% has a laterally extending arm 2'53 carrying a shouldered screw 246, the body portion of which extends through an elongated slot 252 formed in a link 2N which is pivotally connected at its upper end to an arm 2% of the lever Hit. It will be understood that as the rod i322 is raised by depression of the treadle i653, the link 2% moves upwardly with the rod. Threaded in the lower end of the link 2 1 5- is an adjustable screw 24%, arranged by engagement with the screw 248 to swing the latch 239 in the direction to release the wedge itil to the action of the spring 223 as the link M4 is thus moved upwardly. The wedge il'iii is thus released substantially at the time in the upward movement of the rod E32 when the toe rest is moved into engagement with the top of the forepart of the last. Accordingly, as the wedge is moved to the left (Fig. 10), the block 556 moves with it until its end face 258 engages one of the substantially vertical faces or shoulders on the block E8 5 separating two of the steps ltd, continued movement of the wedge ifit to the left then acting to raise the block ldfi until it engages one of the steps 1% on the block Iii-d. It will be understood that in operating upon lasts of different sizes, the position of the lever i iii will vary in accordance with variations in thickness of the foreparts of such lasts. By providing the block IE4 with a plurality of steps 86, a wedge I98 having a slight inclination may be used, thereby rendering the parts self-locking while affording sufficient amplitude of movement to cause the block 4 to engage one of the steps itii in any position into which the lever i it may be moved in operating upon lasts of difierent sizes.

The above-mentioned member 83, for engaging the top of the heel end of the last, is carried by upwardly extending rod 252 (Fig. 5) that is vertically movable in bearings formed in a bracket 255 secured to the bracket 54. The rod 252 is held against turning movement in the bracket by means of a tongue 255 that slidably engages a groove 258 in the bracket 25 i, and surrounding the rod 252, between the bracket and the head 25d of the rod, is a spring 282 which tends normally to uphold the rod with a shoulder 251i thereon in engagement with a portion of the bracket 25:3 and with the member 83 in an elevated position. The member is in the form of an inverted T, the crossbar of the T being rounded and of sufrlcient length to engage the top face of the heel end of the last for substantially its entire Width. The member 88 is connected to the rod 252 for adjustment about an axis extending laterally of the last to vary the position of its last-engaging end relatively to the toe rest as may be necessary in operating upon lasts of different lengths. As shown, tl e lower end portion of the rod 252 is forked to straddle the member @8, the arms of th forked portion being provi ed with clo l: A, 2558 through which er the arms of a yoke 262 t lower end of the rod 2%. pivoted to a projection of the rod and seated in a recess in the proi tion 2H3 is a spring 2'26 that bears at its upper end against a laterally extending ib on the yoke awn on the forked end member 89 in engagement with a toothed block 280 secured to the rod 292. The construction is such that by pulling down on the member 83, against the resistance of the spring 219, the member 88 may be disengaged from the toothed block 299 and swung relatively to the rod 252 to vary the position of its last engaging end lengthwise of the last, after which it may be released to the action of the spring 219 for engagement With the toothed block 289 which looks it in adjusted position. Formed on the rod 252 are upwardly facing ratchet teeth 282, and pivotally connected to the bracket 254 is a pawl 234, urged by a spring 286 in a direction to hold it in engagement with one of the ratchet teeth 232 and thus to lock the member 88 in engagement with the heel end of the last. It will be understood that the member 98 is moved into engagement with the heel end of the last by depression of the rod 252, which is effected by the operator, preferably after the toe rest 89 has been moved into position to clamp the toe end of the last. For unlocking the member 88 at the end of the last drilling and bushing inserting operations, there is fast to the shaft H2 an arm 2B8 carrying an adjustable screw 299, which is arranged to engage a tail portion 292 on the pawl 284 as the lever I I is swung in the direction to elevate the toe rest and to swing the pawl out of engagement with the ratchet teeth 282, thus releasing the rod 252 to the action of the spring 292 for upward movement.

In the illustrated construction, the side gages 96 and 93 are carried by pivoted arms 294 and 299 that are geared together for simultaneous movement toward or from each other, the arm 294 being keyed to a vertical shaft 298 supported partly in the base 59 and partly in a cover plate 399, which is secured to the base by screws 392 (Figs. 3 and 4) The arm 299 is loosely mounted on a shaft 394, similarly supported partly in the base 59 and partly in the cover plate 399. The portion of the shaft 394 that extends through the hub of the arm 296 is eccentric to the upper and lower end portions of the shaft, and keyed to the upper end portion of the shaft and resting on the top face of the cover plate 399 is a collar 395, provided with an arcuate slot 398 through which extends a cap screw 319 threaded into the cover plate and arranged to hold the collar 393 on the shaft 394 against turning movement. The slot 398 is concentric with the axis of the upper and lower end portions of the shaft 394, and by loosening the screw 3]!) it will be evident that the collar and the shaft 394 may be turned to vary the spaced-apart positions of the arms 234, 299 to insure the proper meshing of their inwardly extending toothed portions 312, 3M. Each arm 294, 299 has a laterally extending projection 3l9 provided at its outer end with a boss 3l8 engaging a finished surface 329 on the base 59 (Fig. 8). The shaft 298 projects above the cover plate 399 and has keyed to its upper end a finger 322 which is arranged to be engaged by one arm of a lever 324 pivotally connected to the cover plate 399 and provided with a second arm to which there is pivotally connected a forwardly extending rod 328. The rod 328 extends through a block 339, swivelled in a small bracket 332 secured to the base 59 by screws 334, and threaded on the outer end of the rod 328 is a hand wheel 339. Extending between the projections 3l6 of the arms 294, 295 and pins 338 in the base 59 are springs 349 that tend to swing the arms toward each other, the movement of the arms toward each other being limited by engagement of the finger 322 on the shaft 298 with the arm of the lever 324. By turning the hand wheel 333 it will be evident that the finger 322 on the shaft 299 may be rotated to vary the spaced-apart positions of the side gages 53, 98, as may be necessary in operating upon lasts of different widths. The side gages 92 and 94 are similarly mounted, being carried by arms 342, 344 (Fig. 4) geared together for simultaneous movement toward or from each other and mounted on parallel vertical shafts 343, 343. Shaft 349 has an eccentric portion, on which the arm 342 is mounted, and has keyed to its upper end a collar 349 similar to the collar 396 of the shaft 394. Each arm 342, 344 has a lateral projection 359 provided at its outer end with a boss 352 resting on the finished surface 320 of the base 59, and extending between the projections 359 and pins 354 in the base are springs 356. Pinned to the upper end of the shaft 349 is a finger 358 engaged by the end of a rod 399 which is pivotally connected to one arm of a lever 392 pivotally connected to the cover plate 399. The rod 369 is guided for movements toward and from the finger 358 by means of a block 394 swivelled in the cover plate 399. The lever 392 has a second arm to which there is pivotally connected a forwardly extending rod 393 that extends through a block 398 swivelled in the bracket 322, and threaded on the outer end of the rod 396 is a hand wheel 3l9. It will be evident that by turning the hand wheel 31.9 the spaced-apart positions of the side gages 92, 64 may be varied in operating upon lasts of different widths. As shown particularly in Figs. 4 and 6, the hub portion of the arm 294 is formed in two parts, one part being keyed to the shaft 298 and carrying screws 3'l2 engaging the other part of the hub, which is loosely mounted on the shaft, this construction affording a finer adjustment of the gages B9 and 98, to insure that they will be spaced apart equal distances from a center line passing through one of the drills 59, when in operative relation to the last, and through the toe gage 69. The hub of the arm 344 carrying the side gage 94 is similarly constructed.

In the illustrated machine, means is provided for locking the arms 294, 299, 342 and 344 against outward movement in response to the swinging movement of the lever l I 9 in the direction to move the toe rest 89 into engagement with the top of the forepart of the last. This means comprises an arm 3'14 (Fig. 2), which is keyed to the shaft H2 and is forked to straddle a vertical rod 379 (Fig. 5) which is supported by brackets 378 secured to the bracket 54 and is held against endwise movement in the brackets 318 by means of a set screw 389. Slidably mounted on the rod 315 is a flanged sleeve 382 connected by links 384 to the forked end of the arm 374. A flange 393 of the sleeve 382 is bored to receive four rods 333 that are pivotally connected at their lower ends to levers 399 which are pivotally connected to the above-mentioned cover plate 399 (Fig. 8). Threaded on the upper end of each rod 339 are nuts and lock nuts 392 and surrounding each rod between the flange 399 and a shoulder 394 on the rod is a spring 396. Each lever 399 (Fig. 8) has formed thereon a cam surface 398 which engages the head of a pin 490 vertically movable in the cover plate 399 and engaging at its lower end one of the abovementioned bosses 3|8, 352. The construction is such that as the lever H9 is swung in the direccured to the spindle by a set screw did.

die below the sleeve sleeve by screws 422 there is a thrust washer tion to impart downward movement to the toe rest 85, the arm 3% is swung in the direction to move the sleeve 362 downwardly on the rod 373. As the sleeve 382 is thus moved, it acts to compress the springs 3535 and to impart swinging movements to the levers 3% in directions to cause the cam surfaces 593 to force the pins 1G9 hard against the bosses 358, which rest on the finished surfaces 329 of the base The arms EEG and 3&2, are thus held against relative movement to assist in preventing displacement of the side gages E2, t l, lit and 68 as the last is clamped by the toe rest 85 in the position determined by the gages.

The mounting of the three drills t and the three bushing inserting tools and the mechanism for operating these two sets of tools will now be described. The drills are rotated rapidly by constantly driven spindles lti, dim and N36 to bore the three parallel holes l-f (Figs. 4 and 33) extending from the bottom face of the last at a predetermined angle, i. e., substantially a right angle to the general plane of the bottom of the forepart of the last, after which three bushings B are forced to the bottoms of the holes by the inserting tools'iiii. Preferably the bushings of slightly larger diameter than the bored holes so that theywill be retained by friction the last after they have been forced into the last. Surrounding the upper end portion of each spindle iil l and 265 is a sleeve 5%,

bored to provide a drive fit for a nonrotatable bushing liii through which the drill 53 extends, the bushing being seated against a shoulder on the sleeve see (Fig 33). Each spindle is provided with a central bore to receive its associated drill 55, which rests on the head of an adjustable screw M2 in the spindle and is se- It will be evident that by adjustment of the screws $52 the distance which the drills 56 project above the'upper ends of the nonrotatable-bushings M8 may be varied to vary the distance to which the holes H are drilled in the last L. Each spindle has formed thereon a circular flange M13 between which and a flange A58 which is formed on a second bushing G26 slidably engaging the spinliES and secured to the The sleeves 4% are fitted to slide in holes bored in a plate which is secured by screws itt to a vertically movable slide or drill head 532 (Fig. 2i). The drill head has a ribbed portion "23 3 provided'with three holes diiii in axial alinement with the holes @2 5 formed in the plate @255. The holes 536 are large enough to receive bushings 338, and the rib 53:3 on its upper face is counterbored to receive the heads of upwardly extending bushings l iii in which the spindles liiE, and the are fitted to slide. Surrounding the bushings 426 and d ll! between the flanges Gi and the heads d ll of the bushings i lfi are springs M2. The spindles 4552, QM and 5% extend at their lower ends into bearings idd formed in a plate secured to the drill head 32, the bearings i l i being formed in the plate in axial alinement with the holes Q35 and 526. Between the bottom plate l 'iii and the rib Qfi i there are keyed to the spindles Q32, its and 336, respectively, pinions M55, M18 and 55 for rotating them (Fig. 31). The pinions and 659 are rotated in the same direction by a gear 552, the pinion dfiil acting through an idler @5 1 to rotate the pinion Add in the same direction.

The drill head 432 is vertically movable on a carrier 45% and is guided for such movement by means of a guideway 458 on the carrier and a rod $59, which is secured to the drill head by means of a set screw 3'62 and theupper and lower end portions of which extend into and slidably engage alined bores 3% in the carrier Fig. 26). The above-mentioned gear 4.52 is keyed to a constantly driven shaft lfifi, the keys slidably engaging keyways in the gear to permit the gear to move lengthwise of the shaft in the upward movement of the drill head are. The shaft 466 is supported at its upper end by a bearing in the drill head 332 and at its lower end by .a bearing in a bracket 4%, which is secured by screws liii to the carrier' ibii. Pinned to the shaft is a spiral gear 472 (Figs. 24 and 26) that meshes with a similar spiral gear W4 fast on a horizontal shaft We, splined within a sleeve 418 (Fig. 25), which is held against endwise movement and to which is keyed a pulley'Sfl connected by a belt 482 to a pulley 84 driven by an electric motor435 secured to the top of the base 50.

he inserting tools 58 are provided with reduced upper end portions arranged to extend into the bushings B and with shoulders 48? on which rest the heads of the bushings (Fig. 40). The tools are carried by three parallel shafts 383 each of which is provided with a central recess to receive its associated tool 53 which is secured to the shaft by means or a set screw it-J. Surrounding the shafts 238 at their upper ends are sleeves which are secured to the shafts by set screws 5% (Fig. 24), the sleeves being fitted to slide in three holes 4% bored in a rib portion 493 of the tool head or slide-5&5 which is vertically movable on a guideway 532 formed on the carrier 455. The sleeves ist are'provided with heads 5% yieldingly held in engagement with the bottom finished-face of the rib 498 by springs 5&6 that surround the shafts 483 and bear at their lower ends against washers 533 seated within a recess in a bottom plate are secured tothe slide Efiil, the plate 520 having formed therein bearings for the lower end por- 'tions of the shafts 38 in alinement with the holes 496.

The mechanism for imparting upward movement to the drills 55 and-the drill head'432 comprises a cam lever'5l2 (Figs. 24 and 26) loosely mounted on a laterally extending shaft 5M supported by depending ears 5W on the carrier lit. The lever 552 has a forwardly'extending arm to which there is pivotally connected an upwardly extending adjustable link 5l8, which is pivotally connected at its upper end to depending ears 528 on the bottom plate 445 of the drill head 32. The lever 552 has a rearwardly extending arm 522 carrying a cam roll 52 i arranged to extend into a cam path 526 formed in the side face of a cam wheel 52% which is fast on a laterally extending shai 530 supported by suitable bearings in the base 55. The shape of the cam path 526 is such that at a predetermined time in the operation of the machine, as more particularly hereinafter described, the lever M2 is swung about its supporting shaft 5M in the direction to impart upward movement to the drill head 432 to cause the drills 56 to drill the three parallel holes H in the bottom of the forepart of the last. As the drill head 432 is moved upwardly, the sleeves W8 slidably engage three bored holes 532 formed in the plate 84 in alinement with the holes 426 in the plate 428 of the drill head, the drills 56 being thus

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