US2878474A - Tack supplying mechanisms - Google Patents

Description

March 24, 1959 QUINN 2,878,474

TACK SUPPLYING MECHANISMS Original Filed Nov. 9, 1953 8 Sheets-Sheet 1 [nvenfor dward Quinn arch 24, 1959 QUINN 2,878,474

TACK SUPPLYING MECHANISMS Original Filed NOV. 9, 1953 8 Sheets-Sheet 3 lmwnfr Edward Quinn,

March 24, 1959 QUINN 2,878,474

TACK SUPPLYING MECHANISMS Original Filed Nov. 9, 1953 8 SheetsSheec 4 arch 24, 1959 E. QUINN 2,878,474

TACK SUPPLYING MECHANISMS 8 Sheets-Sheet 5 Original Filed Nov. 9. 1953 I i lnvenfor :5: Edward Quinn March 24, 1959 E. QUINN 2,878,474

TACK SUPPLYING MECHANISMS Original Filed Nov. 9, 1953 8 Sheets-Sheet 6 mllllllllll IllllHlIl Inventor 296 296 Edward Quinn March 24, 1959 QUINN 2,878,474

TACK SUPPLYING MECHANISMS Original Filed Nov. 9, 1953 8 Sheets-Sheet 8 13 1,24 138 & 81

Invenfor Edward Quinn 5 Fez 0ft kw,

United States Patent TACK SUPPLYING MECHANISMS Edward Quinn, Saugus, Mass., assignor to United Shoe Machinery Corporation, Flemington, NJ., a corporation of New Jersey Ori inal application November 9, 1953, Serial No. 255.673. now Patent No. 2.740,138, dated April 3, 1956. Divided and this application January 17, 1955, Serial No. 482,289

10 Claims. (Cl. 1--6) The present invention relates to fastening inserting mechanism and is a division of United States Letters Patent No. 2,740,138, granted April 3, 1956, on an application filed in my name. The invention herein illustrated in its application to the tack supplying organization of the tack driving mechanism in shoe machines for securing bottom marginal portions of shoe upper materials to an insole on a last bottom. As disclosed in the drawings. the invention is embodied in a machine of the type illustrated in United States Letters Patent No. 2,196,212, granted April 9. 1940, on an application filed in the name of Jacob C. Joreensen.

It is usual in machines of this type to provide means such as fin ers for closing the respective tack raceways as required to vary the number of tacks delivered in accordance with the size of the shoe to be operated upon. in the illustrated machine a novel cam member is provided for selecting certain of said fingers for raceway closing position and other fingers for a retracted position permitting the flow of tacks through the raceway. As herein illustrated, the fingers are spring biased to their respective retracted positions and the cam member above referred to operates to advance selected fingers into raceway-closing position. An adiuster in the form of a hand lever is provided for operating the cam memher. When the overlasted materials at the heel end of the shoe are to be secured in position by cement all of the raceways are closed by the operation of a novel member constructed and arran ed to operate on all of the fingers simultaneouslyto advance them into their respective tack arresting positions.

These and other features of the invention will now be. described with reference to the accompanying drawings and pointed out in the appended claims.

In the drawings,

Fig. l is a front elevation of a machine embodying the features of the present invention;

Fig. 2" is a right side elevation illustrating features of tack handling mechanism of the machine illustrated in Fig. 1;

Fig. 3 is a section taken on the line III-Ill of Fig. 2;

Fig; 4- is a. right side elevation illustrating features of the tack handling mechanism, not shown in Fig. 2;

Fig. 5 is an enlarged: front. elevation of the mechanism shown in Fig; 2;

Fig. 6 is a section taken on the line VI-VI of Fig. 5;

Fig. 7 is a section taken on the same plane as Fig. 6 showing the parts in a difierentadjustivel position;

Fig. 8, is a section taken on the. line V1II--VIII of Fig. 5;

Fig. 9. is a section taken on the line IX--IX of Fig. 5;

Fig. 10 is a detail view illustrating a modification of the cam slide shown in Fig. 9;

Fig. 11 is a section taken onthe line Xl-XI of Fig. 1;

Figs. 12 and 13 illustrate the heel end portion of a small shoeand alarge shoe, respectively, which. have been operated upon by the illustrated machine;

Fig. 14 is a front elevation illustrating features of the 2,878,474 Patented Mar. 24, 1959 ice tack handling and tack driving mechanisms with the tack pot and the tack separating and delivering mechanisms removed from the machine;

Fig. 15 is a detail view of a portion of oscillating mechanism;

Fig. 16 is a right side elevation illustrating the mechanism for adjusting the operating instrumentalities in accordance with the size and the width of a shoe to be operated upon;

Fig. 17 is a right side elevation illustrating particularly a cam operated lever shown in Fig. 16;

Fig. 18 is a front elevation illustrating the adjustment mechanism shown in Fig.16 and a train of gearing operated thereby;

Fig. 19 is an enlarged side elevation illustrating features of the adjustment mechanism;

Fig. 20 is a front elevation illustrating certain features of the mechanism shown in Fig. 18, partly in section, on a plane common to the axis of the adjustment hand lever;

Fig. 21 is a right side elevation illustrating certain features of the adjustment mechanism, partly in section on the line XXI-XXI of Fig. 18;

Fig. 22 is a plan View of the adjustment hand lever; and

Fig. 23 is a section taken on the line XXIIl-XX.lIl of Fig. 16.

Referring to Fig. 1, the illustrated machine is provided with a table mounted on four legs and having projecting upwardly from the corners of the table two forward posts 31 and two rear posts 33'. As shown in Fig. 11, the four posts define the corners of a rectangle the sides of which are parallel to the edges of the machine table. Fixed to the upper portions of the forward posts 31, respectively, are collars 35 having cars 37 projecting therefrom at right angles to each other. Fixed to the upper portions of the rear posts 33, respectively, are collars 39 having ears 41 projecting therefrom at right angles to each other. Fixed to the ears 37 and 41 are four horizontal rails 43 which define the four sides of the machine frame. Fixed to the two rails 43 extending from front to back of the machine are two brackets 45 havingv secured thereto two horizontal members 47 on which is mounted a superstructure 49 which supports an oscillatory tack hopper together with tack separating and delivering mechanisms hereinafter described.

For securing the bottom margins of the heel end portions of shoe upper materials to an insole on a last the illustrated machine is provided with a plurality of tack driving pins (not shown) projecting downwardly from": two heads one of which is shown in Fig. 14 and identified by the numeral 51. The tack driving pins operate in a pair of blocks one of which is shown in Fig. 14 and identified by the numeral 53, the block being an integral part of a lasting Wiper assembly 55. Tacks are fed to the block 53 through flexible tubes 34 (Fig. 1). and the tacks are driven by the expansion of two springs 57 (Fig. 14) upon the automatic release of a latch memher which holds the tack drivers in their retracted positron.

For supplying tacks to the drivers the illustrated machine is provided with a tack drum 30 (Fig. 2) of known construction. The tack drum is fixed to a rockshaft 59" mounted in a bearingv in a standard 61 fixed to an elevated platform 63 which is a part of the superstructure 49. In the operation of the machine the tack drum is rotated 360 in a counterclockwise direction and then 360 in a clockwise direction in order to cause tacks therein to drop onto a chute 32 from which they are fed by gravity to a plurality of raceways which direct the movements of the tacks to a separating mechanism which causes the tacks to be dropped through the tubes 34' to the tack driver blocks 53. Fora description of features of the tack'supplyingmecha'nism not herein disclosed refthe tack pot erence may be had to the Jorgensen patent hereinbefore referred to.

In the operation of the tack drum (Fig. 2) tacks in considerable volume are dropped upon an inclined chute 32 which conducts the tacks to a plurality of laterally spaced raceways through which the tacks are conducted to the tack separating mechanism. The majority of the tacks which slide off the chute 32 fail to enter the raceways and fall through the spaces between the raceways against an inclined plate or chute which guides them into the drum. It frequently happens that a few tacks bunch together between the raceways and do not fall through into the drum. These tacks must be cleared away from the raceways before a new supply of tacks is unloaded onto the chute. To this end a tack clearing mechanism which in most respects is of known construction, is mounted to rotate on a horizontal axis 36 extending widthwise of the machine. The tack clearing mechanism comprises three sets of tack clearing fingers 38, the number of fingers in each set corresponding to the number of tack raceways. Each finger is slidably mounted in a guideway in a three sided head 40 for downward movement by gravity into one of the raceways. Each finger terminates in a thin blade which enters one of the raceways during rotation of the finger assembly in a counterclockwise direction, as seen in Fig. 2. The assembly comes to rest after the completion of its operation in its position shown in Fig. 2. In this position the lowermost fingers are held against downward movement into the raceways by the arcuate upper surface of a fixed plate 42. It is important that the finger assembly be held against possible overthrow beyond its illustrated rest position because such overthrow might cause the fingers to come to rest in a position in which they would interfere with the normal flow of tacks and cause a heavy accumulation of tacks in back of the fingers which could cause the tack clearing assembly to jam in the next machine cycle. In order to prevent such overthrow of the tack clearing assembly there is provided in the illustrated machine a tapered friction plug 44 (Fig. 3) constructed and arranged to operate in a conical recess 46 (Fig. 4) located at the axis of a ratchet wheel 48 fixed to one end of a shaft 50 (Fig. 3) on which the tack clearing assembly is mounted. The friction plug is slidably mounted in a counterbore 52 formed in a cylindrical member 54 secured in a fixed vertical plate 56 and arranged in coaxial relation to the tack clearing assembly. Friction is created between the tapered end of the plug and the conical recess in the ratchet wheel by a spring 58 surrounding the tail portion of the plug and confined between a peripheral flange 60 on the plug and a disk 62 at the inner end of a screw 64 mounted in a tapped hole in the outer portion of the cylindrical member 54. The screw is adjustable to vary the compression of the spring thereby to alter the degree of friction applied by the plug, the screw being secured in adjusted position by a lock nut 66. The plug 44 is held against rotation with the ratchet wheel by a key 68 mounted in a groove in the cylindrical member 54 and seated in a notch in the flange 60.

The tacks which flow into the raceways from the chute 32 are conducted through the raceways to a mechanism which separates the leading tack from each raceway and delivers it to one of the tack tubes 34. The tack separating and delivering mechanism of the illustrated machine is substantially the same as the tack separating and delivering mechanism disclosed in the Jorgensen patent hereinbefore referred to and is therefore not specifically described herein. As in the machine of the Jorgensen patent the illustrated machine is provided with eleven raceways from which tacks are delivered to twenty-two tack tubes. Twenty-one of these tubes deliver tacks to the tack blocks hereinbefore described and the twenty-second delivers tacks to a container in which a reserve supply is accumulated. For arresting the flow of tacks through the raceways the illustrated machine is provided with eleven tack arresting fingers 70 (Figs. 5 to 8) which are generallysimilar to the tack arresting fingers provided in the Jorgensen machine. The fingers are mounted on a common shaft 72 and certain of these fingers are fixed to the shaft and are moved into and out of tack arresting position by rotation of the shaft while the remainder are freely mounted on the shaft and are rotated thereon to move them into and out of tack arresting position. The mounting of the fingers on the shaft is substantially the same as shown in the Jorgensen patent and is fully described therein. In the illustrated machine the fingers a and b (Fig. 5) at opposite ends of the shaft 72 are fixed to the shaft while the remaining fingers are freely mounted on the shaft. The two fingers c are held permanently retracted so long as fastenings are to be delivered and are closed only when the delivery of all tacks is arrested as, for example, when the machine is operated without a shoe in it or when the lasting margins are to be adhesively secured in overlasted position without the aid of fastenings. The five fingers d, e, f, g and h are either rotated collectively upon the shaft by manually operated mechanism hereinafter described or are individually rotated upon the shaft by the operation of a hand lever which is adjusted in accordance with the size of the shoe to be operated upon. The fingers c operate in the raceways which sup: ply the tack :1 (Figs. 12 and 13) which is driven at the center of the overlasted margin and two tacks t2 and 13 adjacent thereto on either side thereof, and a fourth track which is deposited in a container wherein a reserve supply is accumulated. The fingers d, e, f, g, and h operate in the raceways from which are supplied the tacks t9 and all of the tacks extending toewardly therefrom. The remaining fingers a and b operate in the raceways from which are supplied the eight tacks which are driven through the opposite side portions of the lasting margins between the tacks t9 and the central tacks t1 and 13. When the heel end lasting and tacking operation is to be completed in the illustrated machine the fingers a and b are retracted from their raceways in order to permit the delivery of a full complement of tacks to the tack blocks. If, on the other hand, the heel end lasting and tacking operations are to be completed in another machine, the fingers a and b are positioned in their raceways to arrest the flow of tacks therethrough. When all of the raceways are to be closed the fingers a, e, f, g and h are rotated concomitantly into their respective tack arresting positions as shown on Fig. 7 by the operation of a hand lever 74 pivotally mounted on cars 76 projecting upwardly and forwardly from a fixed block 78, said lever having incorporated therein a crossbar 80 (Fig. 5) constructed and arranged to engage upwardly extending tail portions 82 of said fingers. The hand lever is normally held in its position shown in Fig. 6 by a spring 84 the forward end of which is anchored to the crossbar 80 and the rear end to a fixed bracket 86. When the hand lever is in this position the fingers d, e, g and h are held retracted from their raceways by five springs 88 anchored at their upper ends to a fixed crossbar 90 incorporated in and offset forwardly from the cars 76 and anchored at their lower ends in recesses 92 formed in the fingers. The hand lever is rotated in a counterclockwise direction from its position in Fig. 6 to its position in Fig. 7 to advance the fingers into tack arresting position and is held in this position, as shown in Fig. 7, by a latch member 94 pivotally mounted thereon and arranged to bear against the upper edge of the bracket 86. In the normal operation of the machine the hand lever 74 is held in its position shown in Fig. 6 by the spring 84 and the fingers d to h are individually rotated into tack arresting position by mechanism hereinafter described. When only the three central tacks 21 to 13 and four breast line tacks are to be driven the tack arresting fingers d to h are advanced individually into tack arresting position by the mechanism illustrated in Fig. 9 when adjusting the machine for operation on shoes of different sizes. When on the other hand, a full complement of tacks is to be driven the tack arresting fingers d to h are advanced individually by the mechanism illustrated in Fig. 10 when adjusting the machine for operation on shoes of different sizes. The mechanism illustrated in Fig. 9 is so constructed that each time a finger is retracted from tack arresting position another finger is advanced into tack arresting position and only seven tacks are supplied in any adjustive position of said mechanism. The mechanism illustrated in Fig. 10 operates to reduce or to increase by one tack on each side the total number of tacks supplied, in accordance with the size of the shoe to be operated upon. In Figs. 12 and 13 there are illustrated a size 5 shoe and a size '13 shoe, respectively. In an operation on the size 5 shoe involving the use of only seven tacks, the tack arresting fingers e and f (Fig. 9) are retracted to permit the tacks identified in Fig. 12 as t4 to t7 to be supplied and the fingers a, g and h are advanced into tack arresting position. When a similar operation is to be performed on the size 13 shoe (Fig. 13) the mechanism illustrated in Fig. 9 is so adjusted that the tack arresting fingers g and h are retracted to permit the tacks identified as t4 to t7 in Fig. 13 to be supplied and the fingers d, e and f are advanced into tack arresting position. The mechanism illustrated in Fig. 10 is constructed to permit all of the fingers d to h to be retracted in order to permit twentyone tacks to be supplied when operating on the size 13 shoe illustrated in Fig. 13. In adjusting the mechanism shown in Fig. 10 for operation on the size 5 shoe illustrated in Fig. 12 the tack arresting fingers g and h are advanced into tack arresting position and the remaining fingers d, e and remain retracted. In the illustrated machine, a run of three full sizes is operated upon in any adjustive position of the tack arresting fingers d to 12, said fingers being adjusted when changing from size 4 /2 to size 5, from size 7 /2 to size 8, or from size 10% to size 11. Referring to Fig. 9, a cam slide 96 is mounted in a transverse guideway 98 formed in the bottom of the block 78. Said slide is provided with two cam surfaces 100 and 182 constructed and arranged to operate on five balls 104 freely mounted in bores 106 (Fig. 7) extending downwardly with a rearward inclination from the upper surface of the block and arranged to register with the upper edge face of the cam slide 96 and with the downward extensions 108 of the fingers d to h, respectively. The cam slide 96 is so constructed that in any adjustive position thereof' two of the balls 184 are positioned in a recess 110 formed in. the slide and the other three balls are held in their respectiveelevated positions. When the cam slide is adjusted one of the balls is moved upwardly into its elevated position rotating the finger 78 which registers therewith in a counterclockwise direction from its position illustrated in Fig. 6 to its track arresting positionillustrated in Fig. 8 and concomitantly another ball moves downwardly into the recess 110 permitting the spring 88 to rotate the finger which registers with said ball in a clockwise direction from its tack arresting position illustrated in Fig. 8 to its retracted position shown in Fig. 6.

The construction shown in Fig. 16 differs from the construction illustrated in Fig. 9 in that the cam slide 112 in Fig. 10 has only one cam surface 114 and the recess 116 in the cam slide 112 extends from the cam surface to the left end of the slide. In each construction thelcam slide is extended to the right beyond the finger assembly and has fixed to its right end portion a block 118 (Fig. 9) to which is pivotally connected a link 1211 which is operated by a hand lever 122 (Figs. 18 and 19) through mechanism now to be described. The operation of the hand lever imparts angular movement to a cam illustrated in Fig. 21 comprising a segmental plate 124 assembled witha generally arcuate. plate 126 and so spaced therefrom that their adjacent edge faces provide the walls of a cam slot 128. The two plates are secured in assembled relation to two straight strips 131] and a bifurcated strip 132. The plate 124 is adjustably mounted on the hub 134 of a plate 136 fixed to a shaft 138, said plates being secured together by a headed screw 140 extending through a bore in the plate 124 and into one of three tapped holes 142 formed in the plate 136. Mounted in the cam slot 128 is a roll 144 pivotally mounted at the lower end of a slide 146 the lower portion of which is slidably mounted in a fixed bracket 148 and the upper portion of which slides in a guideway in a. plate 150 (Fig. 15) mounted onv a fixed bracket 152 (Fig. 14). Freely mounted in the upper portion of the slide 146 is a short shaft 154 (Fig. 15 to which are fixed a small spur gear 156 and a large spur gear 158. The gears are positioned between the plate 150 and a cover plate 160 (Fig. 14) fixed thereto. The small spur gear meshes with a rack162 (Fig. 15 fixed to the plate 150 and the large spur gear meshes with rack teeth formed in the lower portion of a slide 164 mounted in a guideway 166 formed in the plate 150. The slide 164 is connected by a link 168 to the horizontal arm of a bell crank lever '170 (Fig. 14) pivotally mounted on a headed screw 172 fixed in the upper portion of a plate 174 secured to and projecting upwardly from the plate 150. The vertical arm of the bell crank lever is. pivotally connected to the outer end of the link 120 which,. as hereinbefore described, is pivotally connected to the block 118 (Fig. 5) fixed to the cam slide 96.

Referring to Fig. 19, the hand lever 122 has an outer portion in the form of a straight handle of conventional; construction, a central portion 176 which is square in. cross section, and a lower portion 178 in the form of a flat plate the left side face of which, as shown in Fig. 20, is coplanar with the left face of the central section. The lower portion of the hand lever is mounted to rotate freely on the hub 180 of a disk 182 freely mounted upon the shaft 138. A disk 184 of relatively small diameter is fixed to the shaft 138 and arranged in contiguous rela tion to the right or outer face of the disk 182. Referring to Figs. 16 and 23, the adjustive position of the disk 184 relatively to the disk 182 is determined by a locking member or pin 186 mounted. in a bore in a boss 188 projecting outwardly from the disk 184 and arranged to register with any one of a plurality of bores 190 formed in the disk 182. The pin 186 is advanced into the selected bore 198 by a spring 192 mounted in a counterbore in the boss 188 and arranged to bear against a flange 194 near the end of the pin. In order to facilitate thewithdrawal of the pin from the bore a knurled knob 196 is fixed to the end portion of the pin projecting from the boss. the disk 182 (Fig. 19) by a detent 198 at the lower end of a shaft 208 freely mounted in a central longitudinal bore extending through the upper and central sections of the hand lever. The detent is urged downwardly into one of a plurality of square notches in the disk 182 by a spring 2112 mounted in a counterbore in the central section of the hand lever and confined between the base of the counterbore and a flange 204 at the lower end of the shaft. The endwise position of the shaft 280 is determined by the engagement of a cross pin 206 mounted in the upper portion of the shaft in alined notches in the upper end of the hand lever. The hand lever is limited to a swinging movement of about 10 by an abutment member 208 fixed to a vertical plate 218 and an abutment screw 212 adjustably mounted in a block 214 fixed to said plate. Referring to Fig. 18, the plate 210 is secured to a fixed angle bracket 216 and arranged in contiguous relation to the left face of the lower portion of the hand lever. For locking the disk 182 in adjustive position a locking bolt 218 (Fig. 19) is formed in thelower end of a slide 220 mounted in a guidewayformed The hand lever 122 is operatively connected to 7 in a plate 222 fixed to the plate 210. The locking bolt is moved into and out of locking position by the operation of a bell crank lever 224 pivotally mounted between ears 226 projecting from the central portion of the hand lever 122. A pin 228 projects from the upper portion of the slide 220 into an arcuate slot 230 formed in the lower portion of the bell crank lever 224, said slot being of sufficient length to permit the full range of angular movement of the hand lever. The bolt 218 is normally held in locking position by a spring 232 mounted on a pin 234 projecting from the hand lever 122 and arranged to engage the upwardly extending portion of the bell crank lever 224. The upper portion of the bell crank lever is in the form of a handle which is conveniently arranged relatively to the hand lever to enable the operator to grip them both at once and thereby operate the bell crank lever 224 to retract the locking bolt 218 before swinging the hand lever. Upon the completion of such swinging movement, the operator releases his grip on the hand lever and the bell crank lever, permitting the spring 232 to rotate the bell crank lever, thereby advancing the locking bolt 218 into that notch in the disk 182 which has been brought into alinement with the locking bolt by the operation of the hand lever. For holding the disk 182 against rotation during the brief interval following the adjustive movement of the hand lever when it is not controlled by either the locking bolt or the detent, a friction element inthe form of a shoe 236 (Fig. 16) is mounted on the head of a spring pressed slide 238 for engagement with the edge face of a wheel 240 (Fig. 20) which rotates with the disk. The slide is mounted in a guideway in a head 242 at the upper end of a fixed plate 244. Upon the completion of an adjustive movement of the hand lever 122 in a counterclockwise direction from its position shown in Fig. 19, the hand lever is swung in a clockwise direction to its rest position by a spring 246 (Fig. 16) surrounding a plunger 248 and arranged to bear against the head of said plunger which in turn bears against an car 250 projecting outwardly from the central portion 176 of the hand lever. The plunger is slidably mounted in a sleeve 252 fixed in a lug 254 projecting upwardly from a segmental plate 256, and the extent of movement of the plunger by the spring is limited by a collar 258 fixed to the left end of the plunger. The plate 256 is freely mounted on the shaft 138 and is held against angular movement by a locking arm 260 pivotally mounted on a screw 262 mounted in said plate and provided with two notches 264 constructed and arranged to register alternatively with a headed screw 266 mounted in the lower portion of a fixed angle arm 268. When the detent 198 is arranged as indicated by the arrow in Fig. 22, the plate 256 is in its position illustrated in Fig. 16 with the screw 266 positioned in the left notch 264 in the arm 260. With the parts so arranged the hand lever is operable to adjust operating instrumentalities of the machines for operation on decreasing shoe sizes. When it is desired to adjust the operating instrumentalities for operation on increasing shoe sizes, the segmental plate 256 is adjusted in a counterclockwise direction as seen in Fig. 16 by moving the arm 260 to the left to cause the screw 266 to be positioned in the right notch 264. The detent 198 is then reversed by drawing the shaft 200 (Fig. 19) upwardly until the cross pin 206 is retracted from the notches in the hand lever and then turning the shaft 180 and then permitting the spring 202 to seat the cross pin in the notches. Counterclockwise movement of the plate 256 (Fig. 16) moves the central portion of the hand lever into engagement with the abutment screw 212 (Fig. 19). It will be seen that adjustment of said plate together with the reversal of the detent adjusts the hand lever 122 for operation in a clockwise direction as seen in Fig. 19. Such movement of the hand lever is resisted by a spring pressed plunger 270 (Fig. 16) corre sponding to the plunger 248. Said plunger operates to swing the hand lever in a counterclockwise direction into engagement with the abutment screw 212. The angular movement of the disk 182 by the operation of the hand lever corresponds to the spacing between successive notches in the margin of the disk and when the disk comes to rest at the end of the movement of the hand lever the locking bolt 218 (Fig. 19) registers with one of said notches and the spring 232 advances the bolt into said notch to hold the disk in adjusted position. Each movement of the hand lever adjusts the operating instrumentalities one full size up or down as the case may be. In order to enable the operator to determine at a glance the setting of the operating instrumentalities, the wheel 240 (Fig. 20) has inscribed on its edge face numerals which, when read through an opening 272 (Fig. 18) in a bent plate 274, indicate in terms of shoe sizes the adjustment of the operating instrumentalities. The bent plate 274 is arranged in contiguous relation to the periphery of the wheel and is fixed to a bracket 276 secured to the plate 210. Inasmuch as heel lengths differ substantially in different styles and types of shoes, it is some times necessary to adjust the wheel 240 and the disk 182 relatively to the shaft 138 in order that the wheel will correctly register the sizes of the shoes to be operated upon. In the illustrated machine this is accomplished by first withdrawing the pin 186 (Fig. 23) from the bore 190 in which it is inserted, then adjusting the disk as required, and then permitting the spring 192 to advance the pin into the appropriate bore to hold the two disks together in adjusted position. To facilitate the adjustment of the disk 182 a pin 183 (Fig. 23) is mounted in its margin and arranged to project outwardly therefrom.

In most cases the breast line tacks, that is, the tacks identified as t4 and 17 in Fig. 13, have a standard location lengthwise of the shoe but occasionally a shoe manufacturer finds it necessary to drive the breast line tacks in a position other than their standard position because of conditions peculiar to the shoe being manufactured. In order to provide for the positioning of the breast line tacks in such cases, the cam 124 (Fig. 21) is independently adjustable about the shaft 138 after removing the screw 140. In adjusting the cam the bore provided therein for the screw 140 is brought into registration with one of the three tapped holes 142 in the plate 136. After the adjustment has been made the screw is replaced to secure the cam in adjusted position. The shaft 138 (Fig. 20) is journaled in a bearing 284 at the upper end of a bent plate 286 (Fig. 18) fixed to the lower portion of the plate 210. At its opposite end the shaft is journaled in a bearing in a discoidal ear 288 projecting forwardly, as seen in Fig. 18, from a fixed vertical plate 290. The shaft is held against endwise movement by a head 292 at its right end and by the various parts mounted thereon and confined between the ear 288 and the bearing 284.

For locking the hand lever 122 against inadvertent movement during the machine cycle a cam 294 (Fig. 17) is fixed to a shaft 296 and arranged to engage a roll 298 at the rear end of a lever 300 mounted for swinging movement on a fixed fulcrum 302 (Fig. 16). At its for ward end the lever 300 has a downwardly extending tooth 304 constructed and arranged to be advanced into one of the notches in the disk 182 by counterclockwise movement of the lever.

In the operation of the hand lever 122 the shaft 138 (Fig. 16) is rotated either clockwise or counterclockwise as the case may be. Referring to Fig. 21 the rotation of the shaft 138 actuates the cam 124 which moves the slide 146 either upwardly or downwardly depending upon the direction of rotation of the shaft. Referring to Fig. 15 the shaft 146 operates through the rack and pinion mechanism hereinbefore described to impart vertical movement to the slide 164 which operates through connections illustrated in Fig. 14 comprising the link 168, the bell crank lever 170, and the link to actuate the cam slide 96 (Fig. 5) or the alternative cam slide 112 illustrated in Fig. 10.

From the foregoing description it will be understood that when an adjustment of the location of the breast line tacks t4 to t7 (Figs. 12 and 13) is required such adjustment can be quickly and conveniently eifected by the operation of the hand lever 122 (Fig. 18) which operates by adjustment of the tack selecting mechanism to determine the position lengthwise of the shoe of the breast line tacks.

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 shoe machine having a plurality of tack drivers and means including a plurality of raceways for supplying tacks to the drivers, the combination of members for closing the raceways respectively, yielding means for holding the members retracted from the raceways, and a cam shiftable to different positions for selectively moving a plurality of members into raceway-closing position.

2. In a shoe machine having a plurality of tack drivers and means including a plurality of raceways for supplying tacks to the drivers, the combination of members movable to close the raceways respectively, yielding means for holding the members retracted from the raceways, selector cam means for moving into racewayclosing position members selected thereby, and manually operated means for operating the cam means.

3. In a shoe machine having a plurality of tack drivers and means including a plurality of raceways for supplying the tacks to the drivers, the combination of members movable to close the raceways respectively, yielding means for holding the members retracted from the raceways, selector cam means for moving into raceway-closing position members selected thereby, an adjusted, and connections from the adjuster for operating the cam means.

4. In a shoe machine having tack drivers and means providing a plurality of raceways for supplying tacks to the drivers, the combination of a plurality of fingers for closing the raceways respectively, yielding means for holding the fingers retracted from the raceways, and a selector slide for moving into raceway-closing position fingers selected thereby while leaving two selected fingers in inoperative position.

5. In a shoe machine having tack drivers and means providing a plurality of raceways through which tacks are supplied to the drivers, the combination of a plurality of fingers for closing the raceways respectively, a plurality of balls arranged to move the fingers respectively into raceway-closing position, and a slide for operating certain of said balls to move into racewayclosing position fingers selected thereby.

6. In a shoe machine having tack drivers and means providing a plurality of raceways through which tacks are supplied to the drivers, the combination of fingers for closing the raceways respectively, a plurality of balls, one for each finger, means providing guideways 10 in which the balls are respectively mounted for engagement with the fingers, and a cam for operating on the balls to move into raceway closing position fingers selected by the cam.

7. In a shoe machine having tack drivers and means providing a plurality of raceways through which tacks are supplied to the drivers, the combination of fingers for closing the raceways respectively, a plurality of balls, one for each finger, means providing guideways in which the balls are respectively mounted for engagement with the fingers, a cam for operating on the balls to move into raceway-closing position fingers selected by the cam, a hand lever, and connections from the hand lever for operating the cam.

8. In a shoe machine having tack drivers and means providing a plurality of raceways through which tacks are supplied to the drivers, the combination of fingers for closing the raceways respectively, a plurality of balls, one for each finger, means providing guideways in which the balls are respectively mounted for engagement with the fingers, and a selector cam shiftable to different positions and having a recess for receiving two adjacent balls to permit retraction of the two fingers controlled by said balls and thereby selectively move two fingers to retracted position.

9. In a shoe machine having tack drivers and means providing a plurality of raceways through which tacks are supplied to the drivers, the combination of fingers for closing the raceways respectively, a plurality of balls, one for each finger, means providing guideways in which the balls are respectively mounted for engagement with the fingers, and a cam for operating on the balls to move into operative position fingers selected by the cam, said cam having a recess extending to one end thereof constructed and arranged to receive a variable number of said balls thereby to permit the retraction of the fingers controlled by said balls.

10. In a shoe machine having tack drivers and means providing a plurality of raceways for conducting tacks to the drivers, the combination of a plurality of fingers for arresting the flow of tacks through the raceways, a hand lever for moving all of the fingers into tack arrest ing position, yielding means for retracting the fingers from the raceways, and a cam operable when the hand lever is retracted to advance into track arresting position fingers selected by the cam.

References Cited in the file of this patent UNITED STATES PATENTS 515,393 Atwood Feb. 27, 1894 1,561,662 Pope a Nov. 17, 1925 1,631,134 Jorgensen June 7, 1927 2,023,570 Bahr Dec. 10, 1935 2,175,482 Paxton Oct. 10, 1939 2,196,212 Jorgensen Apr. 9, 1940 2,531,099 Anderson Nov. 21, 1950 2,732,553 Bensemann Jan. 31, 1956

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