US2822007A

US2822007A - Machines for use in the manufacture of wedge heels

Info

Publication number: US2822007A
Application number: US562456A
Authority: US
Inventors: Jr Edgar E Joiner
Original assignee: United Shoe Machinery Corp
Current assignee: United Shoe Machinery Corp
Priority date: 1956-01-31
Filing date: 1956-01-31
Publication date: 1958-02-04
Anticipated expiration: 1975-02-04

Description

Feb. 4, 1958 E. E. JolNER, JR-

MACHINES FOR USEl IN THEMANUFACTURE OF WEDGE HEELS Filed Jan. 31, 1956 5 Sheets-Sheet 1 UNCLMP//UG SWITCH .w vr-wr www nm wf .i E A 40 M JH w www i/,Hp 1 2 M m l. 221 A POWER SWITCH SLIDE '5 T'QP SWITCH 2,822,007 MACHINES FOR USE IN THE MANUEACEUREOF wEDE HEELs Feb. 4? 1958 E. E. JOINER, JR

5 Sheets-'Sheet 2 Filed Jan. :51, 1956 Feb. 4, 1958 E. E. JolNER, JR 2,822,007

MACHINES FOR USE 1N THE MANUEACTURE 0E wEDGE HEELs Filed Jan. 31:, 195e 5 sheets-sheet s nvn for E. Edger- E Joiner', Jr:

Feb. 4, 1958 E. E. JOINER, JR

MACHINES FOR USE IN THE MANUFACTURE OF' WEDGE HEELS 5 Sheets-Sheet 4 Filed Jan. 31, 195e @ihii -m V E M, www NW NNW Feb. 4, 1958 E. E. JolNER, JR

MACHINES FOR USE IN THE MANUFACTURE OF' WEDGE HEELS 5 Sheets-Sheet 5 Filed Jan. 3l, 1956 United States vPat@entfice 2,822,007 Patented Feb. 4, 1958 MACHINES FOR USE IN THE MANUFACTURE OF WEDGE HEELS Edgar E. Joiner, Jr., Andover, Mass., assignor to United Shoe Machinery Corporation, Flemington, N. l., a corporation of `New Jersey Application January 31, 1956, Serial No. 562,456

15 Claims. (Cl. 144134) machine and is adapted to remove material from the for-- ward end of a wood heel block to trim said block to the proper length and simultaneously therewith to form a notch or rabbet in the forward portion of the shank of the heel block.

It is an object of the present invention to provide an improved machine in which wedgeheel blocks may be automatically nipped and notched quickly and eifectively with a minimum amount of effort on the part of the operator. The present invention consists in the novel features hereinafter described, reference being had to the accompanying drawings which illustrate one embodiment of the invention selected for purposes of illustration, said invention being fully disclosed in the followingdescription.

In the drawings,

Fig. 1 is a front view of the illustrative machine portions of which have been broken away;

Fig. 2 is a section on the line II-II of Fig. 3;

Fig. 3 shows portions of the machine partly in side elevation and partly in section on the line III-III of Fig 7;

Fig. 4 is a perspective view of a wedge heel block which has been operated upon by the illustrative machine, portions ofthe original block which have been removed by the machine being shown in dash lines;

Fig. 5 is a perspective view showing a wedge heel which has been formed from the wedge heelblock shown in Fig. 4;

Fig. 6 shows, in front elevation, a portion of the illustrative machine on an enlarged scale;

Fig. 7 is aplan view of a portion of the machine shown in Fig. 6;

Fig. 8 is a view on the line VIII-VIII of Fig. 1;

Fig. 9 is a section on the line IX--IX of Fig. 8;

Fig. l is a wiring diagram for use in describing the operation of the machine; and

Fig. 11 is a View showing in detail one type of impulse switch which may be advantageously used inthe machine.

The illustrative machine is adapted simultaneously to remove material from the forward end of a Wood wedge heel block 20 to trim the block to the proper length by forming a forward face 22 (Fig. 4) and to form on'the block adjacent to said face a rabbet or notch 24 having a floor 26. The wedge heel block, which has been operated upon by the illustrative machine and will be identied by reference numeral 20a, is subsequently turned, tunneled and has its heel seat and shank breasted to provide a wedge heel 20b (Fig. 5) adapted to be attached to a slip lasted shoe (not shown). In the finished shoe the rabbet or notch 24, which is formed at the forward portion of the shank of the wedge heel block, receives the rear end portion of a platform (not shown) of the shoe, a common outsole being applied tothe bottom of the platform and tothe bottom of the heel.

The illustrative machine comprises a carrier slide 28 (Figs. l, 3, 6 and 7) upon which the wedge heel block 20 is positioned, by means hereinafter described, and is secured to the slide by a clamp 30 also mounted on the slide. The carrier slide 28 is supported by a guide or guide table 32 and is guided for movement on said table in a rectilinear path 34. The wedge heel block 20 is manually positioned on the carrier slide 28 with its rear end and its left side in engagement with back and side gages 36, 38, respectively, after which electrically `controlled, uid pressure operated means is rendered active, in response to manual actuation of a knee pad 40, to cause the clamp 30 to be forced against the block on the slide. Movement of the clamp 30 toward the wedge heel block 20 positioned in the machine automatically renders hereinafter described vactuating mechanism for the carrier slide 28 effective, after a suitable time delay, to cause said slide to move to the right as viewed in Figs. l, 6 and- 7 with the result that the block, moving in said rectilinear path 34, traverses a tool 42 comprising front and rear cutters 42a, 42h, respectively, to trim the block to the proper length and to form the rabbet or notch 24. The cutters 42a, 42h which have longitudinal and transverse cutting edges 44a, 45a; and 44h, 45b, respectively,vare mounted upon a shaft 46 rotatable in a bearing housing 48 secured to a bracket 50 bolted to the upper end of a fixed frame or pedestal 52 (Figs. l, 2 and 3). The tool 42, which is secured in clamped relation against a flange of the shaft 46 by a nut 54, may be described as comprising trimming and rabbeting cutter portions 42a, 4217 respectively.

During a projective or trimming stroke of the carrier slide 28 in the rectilinear'path 34 an ejector 56 mounted on the slide is spring energized or loaded and as the carrier slide approaches the end of this stroke a deector arm 58 secured by screws 60 to said slide operates a plunger 62 of an impulse switch 64 having contacts 64a (Fig. l0) causing, by the provision of means hereinafter described, the clamp 30 to be raised away from the wedge heel block 20a on the slide thus enabling said block to be moved by the ejector from the carrier slide and intov a suitable container (not shown). Immediately after the deiiector arm 58 engages the plunger 62 it engages a plunger 66 (Figs. 7 and 10) of an impulse switch '68 which has contacts 68a and is operatively connected to mechanism hereinafter described causing the carrier slide to be moved on the table 32 back to a retracted or starting position shown in Figs. l, 6 and 7.

The machine is powered by closing a switch to cause a primary coil 67 of a transformer T to be energized thus energizing a secondary coil 67a of the transformer. LThe tool 42 is powered by a motor 69 (Fig. l) operatively connected by a belt 71 to the tool shaft 46. The motor 69 is started in response to closing of a switch 73. -As a safety measure there is also provided a switch which may be readily opened by the operator in the event that it is desirable to stop movement of the carrier slide 28 during its cycle and in order to cause the

wedge heel block

20 or 20a to be unclamped at any time during the cycle of the machine there is provided a switch 72 which may be readily closed by the operator.

The impulse switches 64, 68, as well as hereinafter referred to

vimpulse switches

220, 222 and 280, electrically interconnected, as shown in the Wiring diagram (Fig. l0), to

solenoid valves

227, 252 hereinafter described, may have the general form of an impulse switch 51 such as is shown in Fig. 1l. Such a switch comprises a housing 53 provided with a rectilinear bore 55 for receiving a plunger 57, said plunger being normally held in its idle or retracted position against a stop face 59 of the housingby a spring 61. Fixed to the housing 53 is a pi11263`which passes through elongated slots 75 formed in a lever 77 upon which a roll 79 is rotatably mounted and which is normally held by a spring 81 in its position shown in Fig. ll with the lower ends of the slots in j engagement with the pin 63, said roll when the plunger is in its idle position normally engaging in a circular channel 83 formed in the plunger. Slidable in a box 85 screwed to the housing 53 is a plunger 87 which, when depressed as viewed in Fig. ll against the action of a spring (not shown), bridges contacts 89 of the switch. The plunger 57 has also formed in it a wide circular channel 91 which is separated from the circular channel 89 by a land 93. When the plunger 57, which corresponds to the plungers of the above-mentioned impulse switches, is moved against the action of the spring 61, the lever 77 is swung clockwise about the pin 63, which is then in engagement with the lower ends of the slots 75, causing the plunger 87 to be moved across the contacts 89 against the action of the above-mentioned spring (not shown). As the plunger 57 moves back to its retracted position under the action of the spring 61 a shoulder at one side of the land 93 causes the lever 77 to be moved against the action of the spring 81 to a position in which the upper ends of the slots 75 are in engagement with the pin 63, the lever at this time being cammed away from the plunger 57, the construction and arrangement being such that the roll 79 at this time does not have snicient outward swinging movement imparted to it to cause the lever 77 to be swung against the plunger 87 during retractive movement of the plunger 57. As the land 93 of the plunger 57 moves past the roll 79 of the lever 77 during refractive movement of the plunger, the lever acted upon by the spring S1 is moved to its idle or starting position shown in Fig. l1 ready, upon movement of the plunger 57 from its idle position, to be forced instantaneously across the contacts 89. The above-mentioned

solenoid valves

227, 252 may be of any well-known commercial construction, one type of valve which may be effectively used for this purpose, for example, being disclosed in United States Letters Patent 2,641,229, granted Iune 9, 1953 on an application tiled .l

in the name of Louis F. R. Bellows.

The carrier slide 28 is provided with a bore 74 (Figs. 3 and 7) slidingly fitting on a guide rod 76 secured at its end portions to cross pieces of the table 32 which include ways 78 having flat upper faces 80 engaged by at lower faces 82 (Fig. 3) of the carrier slide. The table 32, which may be described as including the guide rod 76, comprises bosses provided with alined bores 84 for receiving trunnions 36 secured by screws 88 to a vertical l bearing plate 90 which may be moved vertically or trans- I versely of an axis of rotation 155 of the tool 42 into different adjusted positions upon an adjustable frame 92. The guide rod 76 has mounted on it a bumper spring 94 the right end of which, as viewed from the front of the machine, engages a stop nut 96 threaded onto a portion of said rod. The axes of the trunnions 86 may be described as being disposed at right angles to the axis of rotation 155 of the tool 42 and as located at one side of said tool.

The adjustable frame 92 has a vertical apron portion 98 and a box-like portion 100 (Figs. 2, 3 and 6) lateral sides of which are provided with guideways 192 adapted to receive slidingly bearing anges 194 of the pedestal 52. The apron portion 98 of the adjustable frame 92 has rotatably supported by it a screw 106 which comprises a hand wheel 108 and is threaded into the bearing plate 90. In order to guide the bearing plate 90 in a vertical path during its adjustment, this plate has formed in it a channel 111 for receiving a rib 113 (Fig. 6) of the vertical apron portion 98 of the frame 92, the plate also having formed in it slots in which iit guide screws 112 threaded into said apron portion 98. The screws 112 have threaded onto them nuts 114 which are loosened preparatory to adjusting the bearing plate vertically and which are thereafter tightened to maintain this plate in its `desiredy adjusted position. The table 32 may be raised .4 or lowered to its desired operating position in accordance with the depth of the rabbet 24 to be formed on the wedge heel block 20, by loosening the nuts 114 and rotating the hand wheel 108 until the table is at its proper height, the nuts thereafter being tightened to retain the bearing plate in its adjusted position.

In order initially to move the apron portion 98 of the adjustable frame 92 forwardly and rearwardly or lengthwise of the axis of rotation 155 of the tool 42, that is, in the directions 116 (Fig. 3) to vary the position of the trimming cuts lengthwise of the wedge heel block 20, this frame has rotatably mounted in it a hand screw 118 (Fig. 2) threaded into the pedestal 52. The adjustable frame 92 and the pedestal 52 are provided with alined bores for receiving a bolt 120 having threaded on it a nut 122 which, after initial adjustment of this frame, may be tightened to bind the frame in its desired position on the pedestal 52.

Secured by screws 124 (Figs. l and 6) to the table 32 is a depending plate 126 having a rectilinear channel 128 for receiving a portion of a support 132 to which are secured the

switches

62, 64, respectively, which may be referred to as unclamping and limit stop switches. Secured to and extending from the support 132 is a screw 134 which extends through a slot 136 in the depending plate 126 and has threaded onto it a wing nut 13S. Rotatably mounted in a rearwardly extending portion of the depending plate 126 is a screw 140 which is threaded into the support 132 and may be initially rotated after loosening the wing nut 138 to adjust the support to a desired position lengthwise of the channel 128, said nut being subsequently tightened to maintain this adjustment. With such a provision it will be noted that the length of the trimming stroke of the carrier slide 28 and thc point in the stroke in which the clamp 30 releases the heel block 20a may be varied.

The table 32 is provided with bores for receiving a pin 142 upon which is pivotally mounted a multipart rod 144 comprising a turnbuckle 146 and provided with an elongated slot 148 (Figs. 3 and 6) in which ts a shoulder screw 150 threaded into the vertical bearing plate 90. In order initially to set the table 32 at the desired angular position upon the trunnions 86, in accordance with the desired angle of the door 26 of the rabbet 24 with relation to the planar bottom of the wood heel block, the operator grasps a handle 152 secured to the table and after loosening the shoulder screw 150 swings the table approximately to the angular position it is to occupy and thereafter takes up on the shoulder screw in order yieldingly to lockthe lower end of the rod to the bearing plate 90. The turnbuckle 146 is then rotated until the table 32 is arranged at the desired angle which is to produce the desired cut, the shoulder screw 150 then being nally forced against the bearing plate 90 in order to maintain said table against movement. Nuts 1.54 on the threaded portion of the rod 144 are rotated into forced engagement with the turnbuckle to maintain the turnbuckle in its proper adjusted position. In order to facilitate setting the table 32 at the proper angle, said table may have secured to its pointer 151 (Fig. l) arranged adjacent to a scale 153 which has angular cali- `brations and is secured to the vertical bearing plate 90.

The tool 42 may be described as comprising a front or rabbeting cutter portion 42a provided with the cutting edges 44a, 45a which are spaced circumferentially about the axis of rotation 155 (Figs. l and 3) of the shaft 46, the cutting edges 44a being arranged parallel to said axis and forming a locus having the form of a cylinder 157, and a rear or heel trimming cutter portion 42h provided with cutting edges 441), 4511, which are spaced circumferentially of said axis, the cutting edges 441; being arranged parallel to said axis and forming a locus having the form of a cylinder 159.

The carrier slide 28 has secured to it by screws 156 (Figs. 3 and 7) a block supporting Aplatform 158 and 'fitting in 'a1groove160' in said platform is `the back vgage 36 which comprises a. metallic spring plate or work en- .f'gaging portion 162 and may be secured to theplatform `158 in different adjusted positions lengthwise of the A groove 160 by the use of a screw 164 extending through a` s1otf166 in the gage and threaded into the platform. `The position of the back gage 36 in the groove 160 ymay be readily determined by suitable calibrations formed on the platform 158 and the back gage. Secured to an `upstanding iiange of the carrier slide 28 and overlying a portion of 4an upper or heel supporting face 168 of the `wedge heel supporting platform 158 is the edge gage 38 which is preferably made of fibre and is provided with a recess 170 housing, -when the machine is idle, a work engaging portion 172 of the ejector. When it is desired to'form rabbets 24 in Wood heel blocks, which are "already cut to the proper lengths, the back gage 36 may i be omitted and a breast gage (not shown), which is normally fixed to but adjustable on the vertical bearing plate 90, may be provided. For reasons which will appear later the spring plate 162 is yieldable heightwise of the heel block 20 being positioned on the carrier slide 28 and is nonyieldable lengthwise of the block and is adapted `to vbe engaged by the rear end of said block to position the block lengthwise on the platform 158.

Threaded itno the carrier slide 28 is a bearing pin -.174 and supported by said slide and journaled on the pin `is anarm 176 carrying a cam roll or follower 178. Supported by the `arm 176 and fulcrumed on the pin 174 is-the ejector 56 a shoulder 180 of which, when the machine is at rest, is forced against a screw 182, which is threaded into a boss of thearm, lby the action of a spring 184 (Fig. 7) opposite ends of which are attached to the arm and to a pin extension of the ejector. The arm 176,

which -may be referred to as an actuating ar-rn, is constantly urged or biased counterclockwise, as viewed-in Fig. 7, by a spring 186, counterclockwse movement ofthe. arm being limited by the engagement of the screw 182 with the shoulder 180 of the ejector 56 after `the work engaging portion 172 of the ejector has been moved into engagement with the bottom of the recess 170 of the 'side gage 38. The bottom of the recess 170 may be defined as a stop or stop face.

Secured by screws 188 to the carrier slide 28 -is a cam 190 having a face 192 which, during movement of Vthe slide to its projected position is engaged by the follower roll 178 on the arm 176 causing said arm to swing clockwise (as viewed from above) on said slide. It will be noted at this time that the wedge heel block v20 is clamped securely on the carrier slide 28 and accordingly `the ejector 56 is held between the block clamped to the tainer (not shown) as above explained. When the ejector 56 is in its position shown in Fig. 7 it may be described as being in its inactive or unenergized position. The screw 182 carried by the arm 176 and the shoulder 180 of the ejector 56 may be defined as abutments of the arm and the ejector.

l Mounted upon and secured to the carrier slide 28 is an air cylinder 194 having reciprocable in it a piston 196 an upper end portion of which has operatively connected to it a lever 198 fulcrurned on a pin 200 secured to upstanding lugs of the slide. Threaded into the right end of the lever, as viewed in Fig. 6, is a pair of clamp screws 202 which constitute the clamp 30 and have their lower ends initially set in different adjusted positions upon this lever in accordance with the shape ofthe wedge heel v4block 20 to be operated upon. As will be explained later,

the piston 196 is raised inthe cylinder 194 by-liuid under 'pressure supplied to a chamber 204, which is formed by the cylinder 194 and the piston, through a line 206, said piston being constantly urged to a lowered or inactive position against the lower end of the cylinder by a spring 208.

The knee pad 40 is mounted on an arm 210 (Figs. l, 8 and 9) fulcrumed at 212 on a iiange of an angle plate 214 welded to a collar 216 secured to a rod 218 iixed to the pedestal 52. Secured to the outer end of the angle plate 214 are normally open impulse switches 220, 222 (Figs. l, 8 and l0) comprising

plungers

224, 226, respectively, adapted, when moved predetermined distances from their idle positions against springs (not shown) of the switches, to be moved across

contacts

220a, 222a (Fig. 10) of the switches, said plungers being moved back by said springs to their initial or raised positions without bridging their associated terminals. The arm 210 is constantly urged clockwise, as viewed in Fig. 8, by a spring 228 (Fig. 8), this movement of the arm being limited by the engagement of a nut 238, which is threaded onto a screw 232 secured to said arm and which extends through a bore 234 of a depending ange of the angle plate 214, with said depending flange. Counterclockwise movement of the arm 210 (Fig. 8) is limited by the engagement of a nut 236 threaded onto the screw 232 with the depending iiange of the angle plate 214. As will be hereinafter explained, the machine is operated automatically through its cycle by moving the arm 210 to the right, as viewed in Fig. 1, by the action of the operators knee against the pad 40, this movement being effective to slide to the right the plunger 224 of the inipulse switch 220 causing the terminals 22th:y of this switch to be bridged. It will be noted at this point that the operator commonly moves his knee against the pad 40 withonly sufficient pressure to operate the impulse switch 1220,. counterclockwise movement of the pad, as viewed in Fig. 8, ceasing before the plunger 226 of the impulse -switch 222 has been moved suiiiciently to cause the contacts 222a of the switch to be bridged, the limit switch 222 being providedto effect reversal of the carrier slide 228 as will appear later. The operator can readily feel when he encounters spring resistance of the plunger 226 and at this time releases the knee pad 4i), this plunger returning to its idle position, without causing the contacts 222 to be bridged, through mechanism which is disclosed in vdetail in connection with the illustrative impulse switch 53, for example.

The causing of the contacts 220a of the impulse switch 220 to be bridged in response to movement of the plunger 224 of the switch causes a slide bar 225 (Fig. l0) of a solenoid valve 227 to move to a dash line position with the result that the iiuid in a high pressure line 229 is available for the line 2% leading to the chamber 284 formed by the air cylinder 194 and the piston 196. When the switch 72 is closed and when the plunger 62 of the impulse switch 64 has caused the contacts 64a of this switch to be bridged by reason of the engagement of this plunger by the deilector arm S8 of the carrier slide 28, the slide bar 225 of the solenoid valve 227 is moved from its dash line position to its full line position closing the high pressure line 229 off from the line 206 and opening the chamber 284 to an exhaust line 237' thus allowing the spring 268 to move the piston 196 to a position in which the clamp screws 202 are raised.

Secured to and carried by the left end of the carrier slide 28 (Fig. l) is a piston 238 reciprocable in a bore 24@ of an air cylinder 242 secured'to an upstanding ange of the table 32, said piston in its idle or inactive position being held as shown in Fig. l against a left end of the cylinder. Fluid under pressure is available for

faces

244, 246 of the piston 238 through

lines

248, 250 which are alternately connected to the pressure line 229 and .to exhaust lines hereinafter referred to.

Mountedonthe left end of the cylinder 242 is a solenoid valve 252 having movable in it a`slide-bar'-254 which is moved between a dash line operating position in which the line 229 and an exhaust port 255 are open, respectively, to the

lines

248, 250 and accordingly to the

faces

244, 246, respectively, of the piston 238 causing said piston to move the wedge heel block 20 past the tool 42, and a full line position in which the high pressure line 229 and an exhaust port 255a are open to the

lines

250, 248 and accordingly to the

faces

246, 244, respectively, of the piston to move this piston to the left (Fig. from its projected to its retracted or starting position shown in Figs. 1 and 10 and to hold it there.

As the lever 198 is moved clockwise (Figs. l and 6) to clamp the wedge heel block in the carrier slide 2S, a roll 256 (Figs. l, 6 and 7), which during the clamping action of the lever 198 swings an arm 258 fulcrumed on a housing of a pilot valve 260 counterclockwise, causes a slide bar 262 (Fig. 6) of this valve to admit to to a line 264 iiuid under high pressure from the pressure line 229. T he line 264 is coupled to a time delay valve 268 communicating with a face 270 (Fig. 10) of a piston 274 slidable in a cylinder 272, said piston being constantly urged to the right (Fig. 10) by a spring 276. Movement of the piston 274 to the left as viewed in Fig. l0 (to the right as viewed in Fig. 1) causes a plunger 278 of an impulse switch 280 to be moved across contacts 280:1 of this switch and accordingly causes the slide bar 254 of the solenoid valve 252 to be moved into said dash line position in which, as above explained, uid under high pressure and fluid under exhaust pressure is available, respectively, for the

faces

244, 246 of the piston 238 with the result that the carrier slide 23 is moved to the right as viewed in Figs. l, 6 and 7 to move the wedge heel block 20 clamped to said slide past the cutting tool 42 to remove material from the forward end of the block and to form the rabbet 24 at the forward portion of the shank or" said block.

In the operation Vof the machine the operator manually places the forward end of the wedge heel block 20 upon the flat upper face 168 of the platform 158, the left side of said block being in engagement with the side gage 38, and depresses and slides the block rearward until its entire bottom face has been moved onto Said upper face o'f the platform and beneath the then raised clamp screws 202 as well as beyond or behind the spring or work engaging portion 162 of the back gage 36. The block 20 is then slid forwardly on the face 168 of the platform 158 with its left side engaging the side gage 38, until the rear end of the block has been moved into engagement with said spring portion 162, to its position shown in Figs. l, 3, 6 and 7. When the wedge heel block 20 has been properly positioned in the machine the operator while manu- :ally maintaining the block in position, moves the knee pad 40 to the right (Fig. l) causing the Acontacts 22Go of the normally open impulse switch 220 to be bridged and accordingly the slide bar 225 of the solenoid valve 227 to move from its full line position to its dash line position in which iluid under pressure in the line 229 is admitted to the line 206 with the result that the piston 196 is raised in opposition to the spring 208 and the clarnp screws 202 are lowered with substantial pressure against the positioned wedge heel block 20.

As the piston 196 is raised the roll 256 carried by the lever 198 is forced agains't the arm 258 causing the slide bar 262 of the air pilot valve 260 to be moved from its full line position to the left as viewed in Fig. 6 in which iiuid under pressure is admitted from the high pressure line 229 to the line 264 leading to the time delay valve 268 `and thus to the face 270 of the piston 274. High pressure uid operating against the face 270 lof the piston 274 moves said piston against the action of the spring 276 causing the contacts 280a of the impulse switch 280 to be bridged with the result that the slide bar 254 of the solenoidvalve is moved from its full line position toits dash-line position causing fluid under pressure from y.the line 229 to be available for the face 244 of the piston 238 and the face 246 of the piston to be open to the eX- haust line 255. Movement of the piston 238 and..ac cordingly the carrier slide 28 and the wedge heel block 20 to the right, as viewed in Figs. l, 6 and 7, causesmaterial to be trimmed lfrom the forward end of the block and the notch or rabbet 24 to be formed in the shank of the block by the cutters 4211 and 42a, respectively, ofthe tool 42. f

When the carrier `slide 28 has moved to the right as viewed in Figs. 1, 6 and 7 to a position in which the'deflector arm 58 of the carrier slide 28 has moved the plunger 62 sufficiently to cause the contacts 64a of the impulse switch 64 to be bridged, the slide bar 225 of the solenoid valve 227 is moved from its dash line to its-full line position in which the `line 206 is cut off from the high pressure fluid line 229 and in which the chamber 204 is open to exhaust with the result that the spring-208 moves the piston 196 to its lowered position in the cylinder 194 and accordingly the wedge heel block l20a is unclamped thus allowing the then spring loaded ejector'56 to remove the block 20a from the carrier slide. Simultaneous with the release of the wedge heel Iblock 20a from the carrier slide 28 the defiector arm 58 depresses the plunger 66 causing the contacts 68a of the normally open impulse switch 68 to be bridged and thus causing the slide bar 254 of the solenoid valve 252 to be moved back to its full line starting position in which the face 246 of the piston 238 is open to the high pressure line 229 and the face244 of the piston is connected to exhaust line 255a, the piston and accordingly the carrier slide being moved back to their starting positions determined by the engagement of the piston with the Ileft end (Fig. 1) of the cylinder 242.

In order to insure that when the starting `switch is closed the machine `cannot be started duringvthe time, lfor example, that repairs are being made, the arm 210 which carries the knee pad 40 has secured to it a lug 282 (Figs. 8 and 9) provided with a recess 284 for receiving a springpressed detent 286 pinned to a rod 288 slid-able in a bore of a holder 290 screwed to the angle plate 214. The holder 290 is provided with a slot 292 a bottom of which is engaged by a flat head portion of the rod 288 when said rod is in its active position shown in Figs. 9 and 10. With the rod 288 in its active position shown in Figi 9 the arm 210 cannot be moved sufficiently to 'actuatethe plunger 224 of the switch 220. The rod 288 maybe moved to an inactive position by moving the at head portion thereof out of the slot 292 yand turning it about 90.

As above explained, there is also provided the switch 70 which when opened insures against movement of the carrier slide 28 and in order that the operator may release the clamp 30 at any stage in the cycle of the machine the switch 72 may be closed.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a machine of the class described, a rotary cutting tool, a guide, a carrier slide mounted for movement upon the guide, means for positioning a heel block on the carrier slide, power means for clamping the positioned block upon said slide, and power means rendered active in response to the clamping movement of the first-named power means for moving the carrier slide past the tool to cause material to be removed from the block.

2. In a machine for use in the manufacture 'of heels, a cutting tool, a guide positioned adjacent to the tool, a carrier `slide mounted for translatory movement in a predetermined path on said guide, means for positioning a heel block on the carrier slide, power 'operated means for clamping the positioned block to said slide, power operated means rendered'active in` responsetooperation of said block clamping means formoving'lthe carrier slide in said path onthe guide whereby'tomove the' rblock past the cutting tool to remove material lfrom said fblock, means responsive to movement of the slid-e in said path for unclamping the heel fblock yfrom the carrier slide after the block has been' operatedupon by the tool, and means for ejecting the unclampedblock from the carrier slide.

3. In a machine for usefin the manufactureof heels, a rotary cutting tool, a guide positioned adjacent to the tool, a carrier slide mounted on the guide for translatory movement in opposite directions in a predetermined path, uid pressure means for moving the carrier slide in said path, means Vfor positioninga heel block on the slide, fluid pressure means for clamping the block to the slide, a time delay valve, a plunger open to the time delay valve, a switch, a solenoid valve, a pilot valve operative in response to operation of said block clamping means to cause uid under pressure to be admitted to the time delay valve and accordingly to the plunger to operate the switch and accordingly the solenoid valve -thereby rendering said first-named tluid pressure mean-s active to move on the guide the carrier slide from a retracted to a pr-ojected position whereby to move the block past the cutting tool to remove material from said b1ock,`means responsive to said movement of the carrier slide for unclamping the heel block from the slide after said |block has been operated upon by the tool, means for ejecting the block from the carrier slide, and meansV responsive to movement of the carrier slide to its projected position for rendering the first-named uid pressure means effective to return the carrier slide to its retracted position.

4. In a machine of the class described,arotary cutting tool, a guide, a carrier slide mounted for movement upon the guide, means for positioning a heel block on the carrier slide, power means for clamping the' positioned block upon said slide, Vpower means operative'in response to the cl-amping movement of the rst-named power means for moving from a start-ing' position the carrier slide past the tool to `cause material to be'removed from the heel block, an ejector, means for biasing the ejector against the block clamped to the carrier slide, means responsive to movementof the carrier slide on the guide past said tool to a predetermined position for releasing said clamp whereby to render said biased ejector effective to discharge the heel block from ythe carrier slide, and means responsive to movement of the carrier slide to a predetermined `position past thev cutting tool for rendering said second-named power means eiective to move the carrier slide ba'ckto its start-ing position on the guide.

5. In a machine of the class described, a tool comprising trimming and rabbeting cutter' portions, a carrier slide, means for positioning respectively a wedge heel block lengthwise and widthwise on the slide, aclamp mounted upon the carrier slide and adapted to retain the positioned heel on said slide, .a manually actuated'fmember, power operated means which isrendered active in response to movement of said member and is adapted to force the clamp against the block, power operated means for reciprocating the carrier slide, means lresponsive to the clamping of the wood heel block to the'carrier slide for initiating movement of the carrier slide reciprocating means in one direction from a starting position to cause said block to traverse the tool with the result "that material is removed from the forward end of the block by the trimming cutter portion of the t-ool to trim said block to the desired length and a rabbet is formed at the forward portion of the shank of the rbloclcby the rabbeting cutter portion of the tool, an ejector, means for loading the ejector, power means responsive to movement of the carrier slide to a predetermined position in said one direction for causing said first-named power operated means to move the clamp away from the -block thereby permitting the loaded ejector to `force the block otfrthe carrier slide, and means responsive to movement ofthe "carrier slide to a predetermined position for vcausing the power operated carrier slide reciprocating m'eansto elect movement of the slide in a reverse direction causing said slide to return to its starting position.

6. In a machine of the class described, a toollcomprising trimming and rabbeting cutter portions, a carrier slide, back and side gages forv positioning'respectively'a wedge heel block lengthwise and widthwise ron the slide, a clamp mounted upon the carrier slide'and adaptedv to retain the positioned heel block on said slide,` a manually actuated member,`power operated means-which -is rendered active in response to movement of said member and is adapted to force the clamp againstthe block, power operated means `for reciprocating -the ca'rrierslide, means responsive to the clamping of thewood-iheel block to the carrier slide for initiating movement of -the carrier slide reciprocating means in one direction' froma starting position to cause said block to traverse vthe tool `with the result that the trimming cutter portion of-the tool removes material from the forward end of the block-'to trim said block to the desired length and the rabbeting cutter portion of the tool forms a rabbet at the VVforward portion of the shank of the block, a spring actuated ejector mounted on the carrier, means responsive to movement of the carrier slide 4in `one direction for loading the ejector, power means responsive to movement of the carrier slide to a predetermined position in said one direction for causing said first-named power operated means to move the clamp away from the block thus permitting the loaded ejector to force the block oi the carrier slide, and limit switch mechanism responsive to movement of the carrier slide to a predetermined position for `causing the power operated carrier slide reciproeating vmeans to effect movement of the slide in a reverse direction to return said slide to its` start-ing'position.

'7. In a machine for use in the manutacturefof heels, a cutting `tool` which is rotatable about an'axis, a guide positioned adjacent to the tool, a :carrier slide mounted for translatory movement in a predetermined path Yon said guide, an ejector, aside gage which is adaptedlto position the heel block to be operated upon widthwise on the slide and which has formed in it a recess for receiving the ejector, a exible metallic back gage which is yieldable heightwise of the block beingl positioned Von the carrier slide and which is nonyieldable lengthwise of said block and is adapted to be engaged by therear end of the heel block to position it lengthwise on the carrier slide, power means for clamping the block to lthe carrier slide, power means responsive to movementof said block clamping means for moving the carrier slide in said path on the guide whereby to move the block past the cutting tool to trim material Ifrom said. block, means Iresponsive to movement of the carrier slide in said path for spring loading the ejector to fforce the same against the heel block clamped to the carrier slide,and means responsive to movement of the carrier slidein said path for unclamping the block from the carrier slide after the block has been operated upon by the tool, said ejector, when the block has been unfclamped, being rleidered etfective to move the block @from the carrier s 1 e.

8. In a machine *for use in the manufacture of wedge heels, a fixed frame, a cutting tool rotatable in said xed frame for movement about an axis, an adjustable tframe, means for initially moving on said fixed iframe the adjustable frame into different operating positions generally lengthwise of said axis, a bearing plate mounted on lthe adjustable trame, means for initially moving the bearing plate on said adjustable iframe transversely of said axis `into different operating positions, a guide which is mounted on the bearing plate and is initially adjustable on said plate about an axis which is disposed at right angles to the axis of rotation of the tool and is located at one side of said tool, means |for initially adjusting the guide into different angular positions upon the bearing plate about said second-named axis, a carrier slide mounted for translatory movement in a predetermined path on the guide, means *for positioning a wedge heel block on the carrier slide, power means for yclamping the positioned block on the slide, manually actuated means for effecting operation of the power means to cause the block to be clamped to the slide, and power operated means responsive to operation `of said clamping means for moving on the guide the carrier slide in one direction in said path to cause the heel block to traverse the tool thereby trimming said block to the proper length and for forming a rabbet at the forward end of the shank of the block.

9. In a machine for use in the manufacture of wedge heels, a fixed frame, a cutting tool rotatable in said fixed frame for movement about an axis, an adjustable frame, means for initially moving on said iixed frame the adjustable iframe into different operating positions generally lengthwise of said axis, a bearing plate mounted on the adjustable frame, means for initially moving the bearing plate on said adjustable frame transversely of said axis into different operating positions, a guide which is mounted on the bearing plate and is initially adjustable on said plate about an axis which is disposed at right angles to the axis of rotation of the tool and is located at one side of said tool, means for initially adjusting the guide into different angular positions upon the bearing plate about said second-named axis, a carrier slide mounted for translatory movement in a predetermined path on the guide, means for positioning a wedge heel block on the carrier slide, power means for clamping the positioned block on the slide, manually actuated means Ifor effecting operation of the power means to cause the block to be clamped to the slide, power operated means responsive to operation of said clamping means for moving on the guide the carrier slide in one direction on said path to cause the heel block to traverse the tool thereby trim- Zming said block to the proper length and for forming a rabbet at the 'forward end of the shank of the block, an ejector mounted on the carrier slide, means responsive to movement of the carrier slide in said one direction for loading the ejector, means responsive to movement in said one direction of the carrier slide -to a predetermined position for rendering said lirst-named power means ineffective thus causing said clamp to release the block and enabling the then loaded ejector to remove the block from the carrier slide, and means responsive to movement of the carrier slide in said one direction to a predetermined position ifor causing said second-named power means to move the carrier slide in a direction opposite to said one direction to a retracted position on the guide.

10. In a machine for use in the manufacture of heels, a cutting tool, a carrier slide movable in a predetermined path relatively to the tool, means for clamping a heel block to the carrier slide, means for moving the carrier slide in said path to cause material to be trimmed from the heel block, means for unclamping the heel block from the carrier slide as the carrier is moved in said path, an ejector, means comprising an actuating arm and a spring for holding the ejector adjacent to the heel block positioned and clamped in the carrier slide, a second spring operatively connecting the actuating arm to the ejector, and means responsive to movement of the carrier slide in said path for moving said actuating arm against the action of said springs whereby to load the ejector against the heel block and to maintain said ejector loaded until said heel block is unclamped, said ejector being free to force the heel block from the carrier slide after said block has been unclamped.

l1. In a machine for use in the manufacture of heels, a cutting tool, a carrier slide movable in a predetermined path past the tool, means for clamping a heel block to the carrier slide, means for moving the carrier slide in said path to cause material to be trimmed from the block,

"means for unclamping the heel block from the carrier slide as it is moved in' said path, an ejector mounted on the carrier slide, a spring biased actuator arm mounted on the carrier slide and adapted to move the ejector to and maintain it in an inactive position on said slide, a spring connected to the ejector and to the arm, and means responsive to movement ofthe carrier slide for moving said actuator arm against the laction of said springs whereby to bias the ejector against the block then clamped to the carrier slide and to maintain it biased until after the heel has been unclamped from the slide, said block when unclamped being forced from said slide by the ejector.

12. In a machine of the class described, a rotary cutting tool, a carrier slide movable in a predetermined path past the tool, means for positioning a wood heel block on the carrier slide, a stop mounted on said slide, a clamp for securing the positioned heel block on the carrier slide, a pivot pin mounted on the carrier slide, an arm and an ejector rotatably mounted on said pin, a spring for constantly urging the ejector to an unloaded position on said arm, resilient means for urging the arm and the ejector held in said unloaded position on the arm in one direction as a unit about said pin to cause the ejector to be moved against the stop, means responsive to movement of the carrier slide past the tool for rotating the arm relatively to the ejector, then held against movement by the clamped block, against the action of said resilient means and said spring in a direction opposite to said one direction whereby to cause the ejector to be spring loaded for rotation in said opposite direction against the then clamped heel block, and means responsive to movement of the carrier slide in said path for unclamping the block thereby allowing the ejector acted upon by the spring to eject the block from the carrier slide.

13. In a machine of the class described, a trimming tool, a carrier slide, means for positioning a heel block on the carrier slide, means for clamping said positioned block on said slide, a bearing pin secured to the carrier slide, an arm and an ejector which are journaled for independent movement on said pin, `a screw threaded into the arm, a stop mounted on the carrier slide, a spring for constantly urging the arm about the pin in one direction, a spring which is attached to the arm and to the ejector and is adapted to urge the ejector about the arm in a direction opposite to said one direction until stopped by its engagement with said screw, said first-named spring being adapted to move about the pin in said one direction the arm together with the ejector which is in engagement with said screw until said ejector has engaged said stop, means for moving the carrier slide in a predetermined path to move the heel block past the tool, means responsive to movement of the carrier slide past the tool for swinging the arm in said opposite direction about said pin to move the screw away from the ejector and for loading the second-named spring and thus causing the ejector to be forced against the heel block then clamped to the carrier slide, and means for unclamping the block from said slide to allow the loaded ejector to force said block from the carrier slide.

14. In a machine ofthe class described, a rotary cutting tool, a guide table, a carrier slide mounted for translatory movement on the table, means for positioning a heel block upon and clamping it to the slide, means for moving said slide on the table in one direction to cause the heel block to traverse the tool whereby to trim material from the block, an ejector and an arm which are journaled upon the carrier slide for movement about a common axis, a cam roll 4mounted upon said arm, abutments formed respectively on the ejector and the arm, a spring opposite ends of which are attached to the arm and to the ejector and which is adapted constantly to urge the abutment of the ejector against the abutment of the arm, a stop mounted on the carrier slide, a spring which is adapted to urge the abutment of the arm against the abutment of the ejector and to force said ejector against said stop, a cam secured to the guide table, said cam roll being actuated by the cam during the movement of the carrier slide on the guide table in said one direction to move against the action of said springs the abutment of the arm away from the abutment of the ejector and to cause the first-named spring to be loaded whereby to force the ejector with considerable pressure against the heel block clamped to the slide, and means responsive to movement of the carrier slide to a predetermined point in its travel in said one direction on the guide table for releasing the clamp thereby enabling the ejector acted upon by said first-named spring to eject the block from the slide.

15. In a machine for use in the manufacture of heels, a rotary cutting tool, a guide table, a carrier slide mounted for translatory movement in a predetermined path on said table, uid pressure means for moving the carrier slide in said path, means for positioning a heel block on the carrier slide, clamp mechanism for securing the block to the carrier slide, a spring for constantly urging the clamp mechanism away from the carrier slide, a switch, a solenoid valve, fluid pressure means operatively connected to the solenoid valve, manually actuated means for closing said switch to cause said solenoid valve to be operated for rendering said second-named tuid pressure operated means active to operate said clamp mechanism against the action of the spring and thereby to clamp the positioned heel block against the carrier slide, a time delay valve, a plunger open to the time delay valve, a second switch, a second solenoid valve, a pilot valve operative in responsive to operation of said clamp mechanism to cause fluid under pressure to be admitted to the time delay valve and to operate the plunger and accordingly said second switch causing said second solenoid valve to render the rst-named uid pressure means active to move the carrier slide from a retracted to a projected position in said path and accordingly to move the block past a tool to remove material from the block, a third switch, means responsive to movement of the carrier slide to its projected position in said path for operating said third switch and thus to render the first-named solenoid valve active to cause the second-named Huid pressure means to release said clamp mechanism and accordingly to allow said mechanism to be released from the block by the action of the spring, a fourth switch, means responsive to movement of the carrier slide to its projected position for operating said fourth switch and accordingly the second-named solenoid valve to cause the first-named uid pressure mechanism to move the carrier slide in a reverse direction to its retracted position, and means for ejecting the block from the carrier slide when said block has been released from the slide by said clamp mechanism.

References Cited in the le of this patent UNITED STATES PATENTS 1,374,869 Winkley Apr. 12, 1921 1,839,228 Kinney Jan. 5, 1932 2,038,636 Bradbury Apr. 28, 1936 2,573,692 Constantine et al. Nov. 6, 1951 2,712,661 Quirk et al. July 12, 1955 2,725,581 Pickford Dec. 6, 1955 2,739,324 Ponder et al Mar. 27, 1956 FOREIGN PATENTS 278,679 Switzerland Feb. 1, 1952 494,123 Canada June 30, 1953