US1962260A

US1962260A - Machine for shaping uppers over lasts

Info

Publication number: US1962260A
Application number: US646503A
Authority: US
Inventors: Roberts William Tho Buckingham
Original assignee: United Shoe Machinery Corp
Current assignee: United Shoe Machinery Corp
Priority date: 1931-12-31
Filing date: 1932-12-09
Publication date: 1934-06-12
Anticipated expiration: 1951-06-12

Description

June 12, 1934. w ROBERTS 1,962,260

MACHINE FOR SHAPING UPPERS OVER LASTS Filed Dec. 9, 1932 5 Sheets-Sheet l June 12, 1934.

w. T. B. ROBERTS 1,962,260 MACHINE FOR SHAPING UPPERS OVER LASTS Filed Dec. 9, 1932 5 Sheets-Sheet 2 R 7 V ALF 3 2/ 68 Fl fz. 45

//\/VE/\/7L7F wlm wni gllm June 12, 1934. w T ROBERTS 1,962,260

MACHINE FOR SHAPING UPPERS OVER LASTS Filed Dec. 9, 1952 5 Sheets-Sheet 3' June 12, 1934. w B, ROBERTS 1,962,260

MACHINE FOR SHAPING UPPERS OVER LASTS June 12, 1934. w. T. B. ROBERTS MACHINE FOR SHAPING UPPERS OVER LASTS Filed Dec. 9, 1932 5 Sheets-Sheet 5 Patented June 12, 1934 PATENT OFFICE MACHINE FOR SHAPING UPPERS OVER LASTS William Thomas Buckingham Roberts, Leicester, England, assignor to United Shoe Machinery Corporation, Paterson, N. 3., a corporation of New Jersey Application December 9,

1932, Serial No. 646,503

In Great Britain December 31, 1931 24 Claims.

This invention relates to machines for shaping uppers over lasts, and more particularly to power-opcrated machines having means for pulling an upper over a last in one stage of a cycle of operations of the machine and for then holding the upper under tension for the inspection of the operator with the machine at rest, and means for fastening the upper in a later stage of the cycle. The invention is herein illustrated'as embodied in a machine of the same general type as disclosed in Letters Patent No. 1,51G,851,'granted on October 7, 1924 upon an application of A. E. Jerrain and Joseph Gouldbourn, but it is to be understood that it is not thus limited in its ap-- plicability.

In the use of machines of the above-mentioned character it may sometimes happen that an upper is not satisfactorily pulled over the last by the upper-pulling means, as the operator may observe while the machine is at rest with the upper under tension, in which case it is desirable that the upper be released before it is fastened and the upper-pulling operation be repeated. To facilitate this the present invention provides improved means whereby the direction of drive of the machine may be reversed to return the upper-pulling means to its starting position. Conveniently, as illustrated, the starting of the machine reversely is effected by a treadle provided for that purpose in addition to another treadle normally utilized to start it in a forward direction, the machine being stopped automatically at the end of its reverse movement. In one form illustrated the forward and reverse driving means comprises a clutch which is driven either forwardly or reversely, the reversal of the drive of one of the clutch elements and the actuation of the clutch to start the machine reversely being effected by the reversing treadle. In the construction shown such movements of the clutch either forwardly or reversely are effected through epicyolic gearing. In another form illustrated, while the forward drive is effected through a clutch, the reverse drive is effected through additional mechanism which is operative while that clutch is idle.

Machines of the illustrated type are provided with means for separating fastenings for delivcry to the fastening-inserting devices at a predetermined time in the cycle of the machine which, in accordance with variations in the means provided, may be either in the first stage of the cycle, in which the pulling of the upper is effected, or in a later stage of the cycle. It will be evident that if the fastenings are separated only after the completion of the first stage of the cycle, the machine may be reversed at the end of that stage and the upper-pulling opera tion repeated without causing separation of a' second set of fastenings before a set previously separated is utilized. In order to prevent such an undesirable result as that last mentioned when the reverse driving means is applied to a machine in which the fastenings are separated in the first stage of the cycle, the invention further provides novel means for rendering the separating mechanism inoperative in the first stage of a cycle following reversal of the machine. As illustrated this means is controlled by the reversing treadle and is arranged to stop the rotation of a tack pot through connections with which the separating means is operated and to hold the tack pot stationary substantially throughout the reverse drive and the first stage of the next cycle of the machine.

The above and other features of the invention, including various novel details of construction and combinations of parts, will now be more par ticularly described by reference to the accompanying drawings and pointed out in the claims.

In the drawings,

Fig. l is a view in left-hand side elevation of a machine of the type disclosed in the previously mentioned Letters Patent with one form of forward and reverse driving means constructed in accordance with the present invention applied thereto, parts of the structure being broken Fig. 2 is a left-hand side view on a larger scale of a portion of the structure shown in Fig. l, with parts in section;

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

Fig. 4 is a view in front elevation of the lower portion of the machine;

Fig. 5 is a left-hand side View showing mechanism for preventing undesirable delivery of a second set of fastenings to the fastening-inserting means after reversal of a machine in which the fastenings are normally delivered in the first stage of the cycle;

Fig. 6 is a View partly in right-hand side elevation and partly in section, on an enlarged scale, showing an alternative form of forward and reverse driving means with which the machine may be provided;

Fig. 7 is a front view of portions of the mechanisrn shown in Fig. 6; and

Fig. 8 is a front view of certain other portions of the alternative mechanism.

As more fully disclosed in the previously men- Ill) tioned Letters Patent, the machine herein shown comprises a frame having a base 1 and a column 3 on which is mounted a horizontal power shaft 5 which drives through beveled gearing an upwardly extending cam shaft 7. By rotation of this cam shaft operative movements are imparted to grippers for pulling the upper at the opposite sides and the toe end of a last supported on a shoe rest 9, the toe gripper only being shown at 11, and also to devices indicated generally by reference characters 12 and 14 for laying the margin of the upper inwardly over the bottom of the last and for driving fastenings, such as tacks, to fasten the upper in pulled-over position. The means for imparting to the grippers upper-pulling movements in downwardly and rearwardly inclined directions comprise

cams

13 and 15 on the cam shaft 7 which act through springs 16 to rock levers 17 and 19 about horizontal axes and thereby first to close the grippers on the upper and then to move them to pull the upper. It will be understood that in machines of the illustrated type the power shaft 5 is brought automatically to a stop at the end of the first stage of the cycle with the grippers holding the upper under tension to afford the operator opportunity to inspect the upper and to make any necessary adjustments. The operator thereafter starts the machine again to cause it to complete its cycle, the overlaying and fastening of the upper taking place in this second stage of the cycle.

As herein illustrated, the rear end of the power shaft 5 extends outwardly beyond the frame and has forward and reverse driving means associated with it. In the form shown in Figs. 1 and 2 this means includes a driving member or pulley 21 operated by a belt 22, the pulley having a closed rear end 23 and being supported upon a sleeve 25 rotatable on a bushing 26 which is rigidly fixed on the rear end of the power shaft 5. Within the pulley 21 is epicyclic gearing through which the shaft 5 is driven either in a forward direction or in the reverse direction. Secured to the closed rear end 23 of the pulley on the inside of the latter is a gear wheel 27 concentric with the sleeve 25. Two pinions 29 are in mesh with the gear wheel 27 and are rotatable upon horizontal studs 31 arranged diametrically opposite each other and supported by a cage 33 mounted within the pulley 21 and rotatable upon a sleeve 35 fixed to the power shaft 5. Each of the pinions 29 has a smaller elongated pinion 37 formed as a forward extension of it and rotatable on the stud 31. A comparatively large. gear wheel 39 is formed integral with the forward end of the rotatable sleeve 25 on which the pulley 21 is supported and is in mesh with the two small pinions 37. The rear end of the sleeve 25 has fast thereon a disklike member 41 provided with two frusto-conical clutch faces 43 extending respectively around the front and rear portions of its periphery. The closed end 23 of the pulley 21 is provided with a rearwardly extending flange 45 having a frusto-conical clutch face which one of the clutch faces 43 of the member 41 is arranged to engage frictionally at certain times when this member and the sleeve 25 are moved forwardly along the bushing 26. At the rear of the shaft 5 is a stationary cup-like brake member 47 supported on the frame of the machine and with which one of the frusto-conical faces 43 of the member 41 is arranged to contact at certain times when this member and the sleeve 25 are moved rearwardly.

Rotatably mounted on the sleeve 25 is a ring 49 which is held against axial movement along the sleeve by a thrust bearing 51 and check nuts 53. The ring 49 is connected by rearwardly extending cars 55 to the upper end of a lever 57 mounted on a fixed horizontal pivot 59 extending at right angles to the shaft 5. The lower end of the lever 57 is connected to a forwardly extending rod 61 which is connected at its forward end through toggle mechanism 63 and a second rod 65 to an upwardly extending arm 67 (Fig. 1) formed on a reversing treadle 69.

A frusto-conical clutch element or member 71 is mounted on the power shaft 5 forwardly of the cage 33 and is slidable along the shaft but keyed to it so that it may rotate the shaft. On its front end the cage 33 has a forwardly extending flange 73 which serves as a clutch element or member cooperating with the member 71 and which the latter engages when it is forced rearwardly along the shaft 5 by springs 75. Cooperating with the springs 75 to control the clutch member 71 is mechanism substantially like the clutch-controlling mechanism disclosed in the previously mentioned Letters Patent, comprising a lever 76 and a forwardly extending rod 77 which is pivotally connected to the lever and is moved forward automatically by a throw-out lever 78 (Fig. 1) to stop the machine at the end of each stage of the cycle. To start the machine the rod 77 is swung downwardly to disconnect it from the lever 78 by depression of a starting treadle 79 which acts on the rod through a member 80, as more fully disclosed in the above-mentioned Letters Patent, the treadle being normally upheld by a spring 72.

In the operation of the machine the operator positions a shoe and last bottom downward on the shoe rest 9 when the parts are in their starting positions and arranges the margin of the upper between the jaws of the several grippers which are open and in their highest positions at this time. He then depresses the starting treadle 79 to start the machine. The depression of the starting treadle releases the clutch member 71 to the action of the springs 75, as above described, so that the member 71 is forced by the springs rearwardly into clutching engagement with the member 73 on the cage 33. At this time the member 41 fast on the rear end of the sleeve 25 is held by a spring 81, which acts on the lower end of the lever 57, in engagement with the clutch face on the flange 45 of the pulley 21. Accordingly the rotation of the pulley causes the member 41, the sleeve 25 and the gear wheel 39 formed on the forward end the same direction at this time and engage pinions of different sizes which are integral with each other, it will be evident that the cage 33 is carried around with the pulley 21 in the same direction and at the same speed as the pulley.

and that since the cage is clutched to the member 71 on the shaft 5 this shaft is likewise rotated in the same direction and at the same speed as the pulley.

When the machine arrives at the end of the first stage of its cycle with the grippers holding the upper under tension, the clutch member 71 is automatically withdrawn from engagement with the member '73 by the action of the throwout lever 78, as previously described, and is carried into engagement with a stationary brake member 853- to cause the shaft 5 to come to a stop. If the upper appears to the operator to have been properly pulled, he thereafter depresses the starting treadle 79 again to cause the machine to complete its cycle. If, however, it appears to the operator that the upper should be readjusted and pulled a second time, he depresses the reversing treadle 69 instead and holds it in depressed. position. Depression of this treadle imparts forward movement to the rod and by turning of the toggle mechanism 63 about its pivot 64 also moves the rod 61 f0r=- wardly to swing the lever 57 in the direction to carry the member 41 out of engagement with the flange 45 on the pulley 21 and into frictional engagement with the brake member d7. As the treadle 69 is further depressed it acts through a piece 33 thereon that overlaps the starting treadle 79 to depress the starting treadle also and thus to trip the clutch controlled by this treadle, so that the clutch member '71 is moved again by the springs away from the brake 32 and into clutchirn engagement with the cage 33. Since the member 41 is now held stationary by the brake member 4'7, the gear wheel 39 on the sleeve 25 connected to the member 41 is also held stationary and rotation of the gear wheel 2'? with the pulley 21 serves to rotate the pinions 29 and 3'? about their supporting studs 31 in directions opposite to the direction of rotation of the pulley, the pinions by reason of their connection with the stationary gear wheel39 traveling around the axis of the shaft 5 in a direction opposite to the direction of rotation of the pulley and carrying the cage 33 with them. Through the clutch member '11 the shaft 5 is accordingly turned reversely at a somewhat lower speed than that of its, normal operation. In this manner the parts of the machine are returned to their starting positions, the grippers being opened to release the upper. The shaft 5 is brought to a stop automatically at the end of the reverse movement by the lever 78 which acts to withdraw the clutch member '71 from engagement with the member 73 and to move it into en gagement with the brake 82 in the same manner as at the end of each forward movement of the shaft. Thereafter the operator releases the treadle 69, whereupon the spring 81 moves. the member ll. into frictional engagement with the pulley 21, at the same time lifting the treadle 59, and the starting treadle 79 is lifted by the spring '72 and connected with the rod 77 in the manner described in the previously mentioned Letters Patent. It will be evident that in the above-described rearward movement of the member ll for reversing purposes the gear wheel is also moved rearwardly with it but remains in engagement with the pinions 37 which are elongated for this purpose.

In order to prevent reversing the machine at the wrong time the construction is further such that the reversing treadle 69 can be depressed only when the machine is at rest at the end oi the first stage of the cycle. For this purpose the treadle is provided on the upper end of its up wardly extending arm 6*? with a roll 34 arranged to be engaged by a cam 35 mounted on the lower end of the cam shaft '1. This cam is substantially bean-shaped, and at the end of the first stage of the cycle the portion thereof which is of smaller radius lies opposite the roll 84 and thus permits the treadle 69 to be depressed. At any other time depression of the treadle 69 far enough to throw the reverse driving means into operation is prevented by reason of engagement of the roll 84 with that portion of the cam 85 which is of greater radius. In order to permit the treadle 69 to remain depressed while the shaft 5 is being rotated in the reverse direction, the construction is further such that the cam 85 is held stationary by the arm 67 and the roll 8% during the reverse movement of the cam shaft '7. For this purpose the cam 85 is rotatably mounted on the cam shaft and controlled by a coiled spring 86 which yields to permit the cam to be held stationary as the shaft 7 is reversely rotated. When the treadle 69 is released by the operator and the roll 84 swung rearwardly by the arm 67, the spring 86 turns the cam 85 around the shaft '7 into its normal angular relation to the shaft determined by a stop (not shown). The cam accordingly serves to insure against any movement of the power shaft 5 except in a forward direction when the is next started.

In Fig. 1 the invention is illustrated as applied to a machine having tack-supplying mechanism of the character disclosed in Letters Patent No. 1,921,099, granted upon an application of mine on August 8, 1933, in the operation of which the tacks are separated in the second stage of the cycle of operations. Accordingly reversal of the machine and repitition of the first stage of the cycle in the manner described does not cause separation of a second set of tacks before a set previously separated is utilized. If the reverse driving means is incorporated in a machine in which the tacks are separated in the first stage of the cycle,-for example, a machine having tack-supplying mechanism of the character disclosed in Letters Patent No. 1,510,851, there may be utilized mechanism of the character illusrated in Fig. 5 for preventing a second set of tacks from being separated when the first stage of the cycle is repeated. As there shown, the reversing treadle 69 is provided with a rearwardly extending arm 89 which at its rear end has pivoted thereon a block 90 slidingly mounted on a rod 9i, this rod being pivotally connected at its upper end to one end of a l er 92 fulcrumed between its on the frame. The block 96 is mounted on the rod 31 between

springs

93 and 94 through which the rod may be moved yieldingly in opposite directions. The rear end of the lever 92 has connected to it a rod 97 which is arranged to operate a bell-crank lever 99 pivoted on the fixed support for an oscillating tack pot 105 with which machines of the illustrated type are commonly provided. The bell-crank lever 99 is connected to a sliding stop 101 provided on its front end with an upwardly extending lug 192 arranged to cooperate with an angular lug 163 on the tack pot. It will be understood that in tack-supplying mechanism of the wel -known illustrated type the tack separator is operated by mechanism that turns with the tack pot, this mechanism and the tack pot being oscillated by means that is yieldable in case movement of the mechanism is obstructed. In the first stage of the cycle, in which the tacks are separated and delivered in the manner disclosed in Letters Patent No. 1,510,851, the lug 103 on the tack pot is carried around from position illustrated in 5 to a position a little beyond the location of the stop 101. If the reversing treadle 69 is then utilized to reverse the machine, the stop 101 is moved forwardly by the treadlc to a position such that as the tack pot starts its reverse movement in the reversal of the machine the lug 103 comes into engagement with the stop 101, whereby reverse movement of the tack pot is stopped and the tack pot is held stationary while the other parts of the machine are returned to their starting positions. The lug 103 is so shaped that it then interlocks with the lug 102 on the stop 101 and prevents the stop from returning to its starting position when the operator releases the reversing treadle 69, the spring 93 yielding as the treadle returns to its normal position. When the machine is again started to repeat the first stage of the cycle the tack pot 105 accordingly remains stationary until near the end of that stage of the cycle, when it receives enough turning movement in a forward direction to disengage the lug 103 from the lug 102, thus permitting the stop 101 to be returned to its starting position by expansion of the spring 93. this manner the separation of a second set of tacks is prevented, the tacks already delivered to the driving means being utilized as the machine completes its cycle.

The alternative forward and reverse driving vmeans shown in Figs. 7 and 8 compr ses a pulley 151 operated by a flat driving belt 153 (Fig. 7) and cooperating with a clutch member 154 similar to the previously mentioned clutch member 71. The clutch member 15% is moved by springs 155 into clutching engagement with the pulley for driving the shaft 5 in a forward direction and is moved reversely into contact with a brake member 156 to stop the movement of the shaft. The clutch member 154 is controlled by a lever 157 and a rod 158 arranged similarly to the corresponding

parts

76 and 77 the construction hereinbefore described. The rod 158 is moved automatically toward the left (Fig. 6) to stop the machine by a throw-out lever 159 and is swung downwardly to disconnect it from this lever and start the machine by a starting treadle 160 which acts on the rod through a member 161. The operation of these parts will be readily understood from the description of the form of mechanism shown in Figs. 1 and 2 and from the description in the previously mentioned Letters Patent No. 1,510,851.

The pulley 151, which is rotatably mounted on a sleeve 162 fast on the shaft 5, is provided at its forward end with a flat bottomed V-shaped groove 163. Secured to a pivot 164 at the rear of the machine is a curved lever 165 which is below and extends to the right of the shaft 5 (Fig. 7). On th right-hand end of this lever is integrally formed a sleeve 166 (Fig. 6) the axis of which lies parallel to the axis of the pivot 164, this sleeve providing a bearing for a second and shorter lever 167 extending to the left of the sleeve for a purpose hereinafter described. Passing axially through the sleeve 166 is a short shaft 168 the rear end of which provides a bearing for a wheel 169 which has a V-shaped periphery 171 adapted, when the machine is to be driven in the reverse direction, to engage the pulley 151 in its V -shaped groove 163. Rigidly fixed to and rotatable with the wheel 169 on the forward side thereof is a small pinion 173 which meshes with a larger pinion 175 mounted on a forwardly and rearwardly extending stud 177, this stud being secured in the left-hand end of the short lever 167. The pinion 175, when the wheel 169 is in engagement with the pulley 151, meshes with a gear wheel 179 which is rigidly keyed to the shaft 5. It will thus be evident that when the wheel 169 is carried into engagement with the pulley 151 to cause it to be frictionally driven by the pulley, the shaft 5 is driven reversely through the

pinions

173 and 175 and the gear wheel 179, the pulley and the shaft then turning respectively in opposite directions.

Formed on the rear side of the curved lever 165, near that end of the lever that carries the short shaft 168, is a boss 181, a downwardly extending bore in which houses a spring-pressed plunger 183. The upper end of this plunger presses against a boss formed on the lower side of the short lever 167 and tends to force this lever upwardly around the sleeve 166 until it is arrested by an adjustable stop 185 carried by an extension of the lever 165 and overhanging the short lever. If the teeth of the pinion 175 do not ride into mesh with the teeth of the gear wheel 179, but strike against the outer ends of the latter as the lever 165 is swung upwardly to carry the wheel 169 into engagement with the pulley 151, the spring plunger 183 yields until the wheel 169 engages the pulley, whereupon the pinion 175 is rotated and its teeth spring into mesh with the teeth of the gear wheel 179. An adjustable stop 187 is provided on the machine frame to contact with the lever 167'and thus prevent the teeth of the pinion 175 from meshing so deeply with the teeth of the gear wheel 179 as to cause excessive friction between them.

For swinging the curved lever 165 upwardly to move the pinion 175 and the wheel 169 into reverse driving engagement with the gear wheel 179 and the pulley 151 there is provided mechanism including a treadle-operated rod 189 which extends forwardly and rearwardly of the machine and is movable lengthwise. The forward end of the rod 189 is connected to reversing treadle mechanism hereinafter described, and its rear end has fixed to it a rectangular slide member 191 movable in a guideway formed below the lever 165 in a bracket 192 on the frame. Substantially midway between its opposite ends the member 191 is provided with a bore 195 extending vertically through it and providing a guideway for a short cylindrical slide 197. This slide has formed in its opposite ends cup-like recesses 199 arranged to receive the spherical ends of two

toggle arms

201, 203. The lower end of the toggle arm 201 is also spherical in shape (Fig. 7) and is housed in a yieldable cylindrical member 205 which is slidingly movable in a vertical bore in the bracket 192 r and is normally held upward against a shoulder formed by a reduction in this bore by a stiff spring 207 adjustable as to compression by a threaded member 209. The upper spherical end of the toggle arm 208 lies in a cup-shaped recess formed in the lower end of a vertically extending screw 211 adjustably secured in the lever 165.

Movement of the rod 189 in a forward direction straightens the

toggle

201, 203 as shown in Fig. 6, and thereby causes the lever 165 to swing upwardly about its pivot 164 against the resistance of a spring 212 and carry the wheel 169 and the pinion 175 into reverse driving engagement with the pulley 151 and the gear wheel 179 respectively, so that the pulley drives the shaft 5 in a direction opposite to that of its own rotation and at substantially half its own speed. At its forward end the rod 189 has a pin and slot connection at 213 with an upstanding arm 214 which is one arm of a bell-crank lever the other arm of which forms a reversing treadle 215. This bellcrank lever is rotatably mounted on a shaft 216 on which the starting treadle 160 also is mounted. An arc-shaped portion of the treadle 215 extends over the starting treadle 160 and is provided with a depending adjustable stop 219 arranged to engage the top of the treadle 162 to depress the latter by the movement of the reversing treadle 215. Such depression of the starting treadle 160 serves through the upwardly extending member 161 to swing the rod 158 downwardly and thereby disconnect it from the thr0w out lever 152 in the same manner as when the treadle 155 is depressed to start the machine in the forward direction. This releases the clutch member 154 to the action of the springs 155 which force it toward the right (Fig. 6) out of contact with the brake member 156. There is, however, provided mechanism that prevents the clutch member 15% at this time from being moved far enough to carry it into ment with the pulley 151. For this purpose in is pivotally connected to the reversing treadle 215 near its forward end a vertically extending rod 221 (Figs. 6 and 8) the upper end of which is connected to a straight arm of a sickle-shaped lever 223, this lever being pivotally mounted on a portion 225 of the machine frame. The curved oi the lever 223 has formed on its rear side near its outer end a cam face 227. This cam face ges a roll 229 mounted on an upwardly extending arm of small lever 231 which is piv oted at 232 on the portion 225 of the frame. A tension spring 233 connected to the lever 231 holds the roll 229 in engagement with the cam face 227. On the lower arm of the lever 231 is formed a beveled face 234 arranged to engage a cooperating face on the rear side of a dcwnturned lug 235 on the forward end of the rod 153. pression of the reversing treadle 215 first swings the lever 223 in a clockwise direction toward the position in which it is shown in Fig. 8 from 2 nor- 'mal position displaced about 45 from the illu trated position. Such movement of the lever causes the cam face 227 to swing the lever 231 in a counterclockwise direction to carry the bcveled face 234 of this lever to a position behind downturned iug 235, the rod 158 being at this time in its foremost position. As the lever 223 continues its movement a concentric portionoi the cam face 227 extending below a point 239 thereon is carried to a position opposite the roll 229 to maintain the lever 231 in the position indicated in Fig. 8. After the beveled face 234 of the lever 231'has thus been moved to a position at the rear of the lug 235, the stop 219 on-the treadle 215 engages the top of the starting treadle 160 and depresses the latter to release the clutch member 154 in the manner hereinbefore described, the lever 231 preventing the clutch membar. from being moved far enough rearwardly by the springs 155 to engage the pulley 151. During these operations the lost motion between the treadle 215 and the rod 189 provided for by the pin and slot connection 213 is taken up, and thereafter by continued depression of the treadle the rod 189 is operated to throw the reverse driving mechanism into operation in the manner hereinbefore described, the clutch member 154 remaining idle. While the lever 223 continues to move as long as the treadle- 215 is moved. the lever 231 is nevertheless maintained in its operative position by the concentric portion of the cam face 227 on the lever 223.

Because of the fact that the reverse driving mechanism is thrown into operation through the straightening of the

toggle

201, 203 and the fact that the relatively stiff spring 207 beneath the member 201 tends to prevent breaking of the toggle as well as the straightening thereof, the reversed driving mechanism remains in operating position, even if the operator; removes his foot from the treadle 215, until it is automatically returned to its idle position as hereinafter described. A spring (not shown) which holds the reversing treadle initially upraised is not of sufficient strength to overcome the action of the spring 207 and thus to raise the .treadle once it has been depressed by the operator. Thus the operator is relieved of the necessity of holding the treadle depressed while the machine is running in the reverse direction.

For throwing the reverse driving mechanism out of operation when the parts of the machine have been returned to their starting positions there is pivotally mounted on the same shaft 216 as the starting and reversing treadles a rearwardly extending lever 245 which carries a stop screw 247 arranged to abut at its lower end against a short rearwardly extending lug 248 on the reversing treadle 215. An upwardly extending rod 249 is pivotally connected to the rear end of the short lever 245 and is guided for upward and downward movements in a fixed guide memher 246. A narrow roll 251 is mounted on a pin projecting from one side of the upper end of the rod 249 and is arranged to be engaged by a cam indicated by dotted lines at 253 (Fig. 6) which is secured to the inner face or" a cam wheel 241 fast on the lower end of the cam shaft 7, this being the cam wheel that operates the throw-out lever 159. The earn 253 is so positioned on the wheel 241 that when the machine is normally at rest with the parts in their starting positions it lies directly over the roll 251 and thus prevents at this time depression or the reversing treadle 215, thus guarding against inadvertent starting of the machine in the wrong direction. In the first stage of the cycle the cam 253 is carried away from over the roll 251, and when the machine comes to a stop at the end of this stage of the cycle the cam is positioned on the fartherside of the cam wheel away from the roll. Accordingly it the operator wishes to reverse the machine at this time to release the shoe, he is free to depress the reversing treadle 215 for this purpose. As the machine runs in the reverse direction the cam 253 approaches. the roll 251 and near the endof the reverse movement of the machine it acts on the roll to depress the rod 249 and thereby to restore the reversing treadle 215 and the rod 189 to their normal positions, thus throwing the reverse driving means out of operation. At substantially the same time the throw-out lever 159 is operated to pull the rod 158 forwardly and thereby to force the clutch member 154 into engagement with the brake member 156, thus stopping rotation of the'shaft 5.

It will be appreciated that the alternative form of reverse driving mechanism just described remains entirely idle when the machine is running normally in a forward direction .and therefore the weight of the parts which are rotated under these conditions is less than when the machine is equipped with the mechanism shown in Figs. 2 and 3. It will be further appreciated that the alternative form of mechanism, which is outside of the driving pulley, is more conveniently accessible for adjustments or repairs than the form shown in Figs. 2 and 3, the latter being for the most part enclosed within the pulley. It will be understood that if conditions require it there may be utilizedwith the alternative form of mechanism parts such, for. example, as shown in Fig. 5 for controlling the tack-supplying means.

Having described the invention, whatlclaim as new and desire to secure by Letters Patent of the United States is:

1. In a machine for shaping uppers over lasts, the combination with power-operated means for pulling an upper over a last and for then holding it under tension with the machine at rest, of forward and reverse driving means, a treadle movable by the operator to start the machine in the forward direction to effect the pulling of the upper, braking means releasable by said treadle, another treadle movable by the operator while the upper is heldunder tension to start the machine in the reverse direction, and means for operating said first-named treadle to release the braking means by the movement of said other treadle.

2. In a machine for shaping uppers over lasts, the combination with power-operated means for pulling an upper over a last in the first stage of a cycle of operations of the machine and for then holding it under tension with the machine at rest, and power-operated means for laying the margin of the upper over the bottom of the last and for fastening it in another stage of the cycle, of forward and reverse driving means including a member rotatable continuously in the same direction for driving the machine either in the forward direction or in the reverse direction, another member arranged to be frictionally engaged by said first-named member or to be disengaged therefrom in accordance with the direction of the drive, and means movable at the will of the operator at the end of the first stage of the cycle to shift the position of said other member for reversing the direction of the drive.

3. In a machine for shaping uppers over lasts, the combination with power-operated means for pulling an upper over a last and for then holding it under tension with the machine at rest, of a clutch comprising cooperating elements engageable with each other to operate the upper-pulling means to pull the upper, and clutch-controlling mechanism comprising a member movable at the will of the operator while the upper is held under tension to reverse the direction of movement of one of said clutch elements and also to effect engagement of said elements with each other for returning the upper-pulling means to its starting position.

4. In a machine for shaping uppers over lasts,

the combination with power-operated means for pulling an upper over a last and for then holding it under tension with the machine at rest, of a clutch comprising cooperating elements engageable with each other to operate the upper-pulling means to pull the upper, and clutch-controlling mechanism comprising a member movable by the operator at will while the upper is held under tension to reverse the direction of movement of one of said clutch elements and further movable in the same direction to effect engagement of said elements with each other for returning the upper-pulling means to its starting position.

5. In a machine for shaping uppers over lasts, the combination with power-operated means for pulling an upper over a last and for then holding it under tension with the machine at rest, of a clutch comprising cooperating elements engageable with each other to operate the upper-pulling means to pull the upper, means for tripping said clutch to start the machine, and a member movable at the will of the operator while the upper is held under tension to reverse the direction of movement of oneof said clutch elements and also to operate said clutch-tripping means to start the machine in the reverse direction for returning the upper-pulling means to its starting posi-- tion.

6. In a machine for shaping uppers over lasts, the combination with power-operated means for pulling an upper over a last and for then holding it under tension with the machine at rest, of a clutch comprising cooperating elements engageable with each other to operate the upper-pulling means to pull the upper, a treadle for actuating said clutch to start the machine, and mechanism comprising another treadle movable by the operator at will while the upper is held under tension to reverse the direction of movement of one of said clutch elements and also to operate said first-named treadle to start the machine in the reverse direction for returning the upper-pulling means to its initial position.

7. In a machine for shaping uppers over lasts, the combination with power-operated means for pulling an upper over a last and for then holding it under tension with the machine at rest, of a clutch through which said upper-pulling means is operated, a driving member, mechanism comprising epicyclic gearing for driving said clutch either in the forward direction or in the reverse direction by the movement of said driving member, and controlling means movable by the operator at will while the upper is held under tension to cause the clutch to be driven reversely through said gearing to return the upper-pulling means to its starting position.

8. In a machine for shaping uppers over lasts, the combination with power-operated means for pulling an upper over a last and for then holding it under tension with the machine at rest, of a clutch through which said upper-pulling means is operated, a driving member, mechanism comprising epicyclic gearing for driving said clutch either in the forward direction or in the reverse direction by the movement of said driving member, and controlling means comprising a member movable by the operator at will while the upper is held under tension to set the clutch-driving mechanism in reversing position and then to actuate the clutch to effect the return of the upper-pulling means to its starting position.

9. In a machine for shaping uppers over lasts, the combination with power-operated means for pulling an upper over a last and for then holding it under tension with the machine at rest, of a clutch comprising cooperating elements engageable with each other to operate the upper-pulling means to pull the upper, a driving pulley, mechanism comprising epicyclic gearing housed within said pulley and connected to one of said clutch elements for driving the clutch either in the forward direction or in the reverse direction by the movement of the pulley, and controlling means movable by the operator at will while the upper is held under tension to cause the clutch to be driven reversely through said gearing to return the upper-pulling means to its starting position.

10. In a machine for shaping uppers over lasts, the combination with power-operated means for pulling an upper over a last and for then holding it under tension with the machine at rest, of a clutch through which said upper-pulling means is operated, a rotatable driving member, epicyclic gearing through which to drive said clutch either in the forward direction or in the reverse direction by the movement of said driving member, a member controlling said gearing and arranged to rotate with the driving member to drive the clutch in a forward direction and to be held stationary to cause the clutch to be driven reversely,

andme'ans to enable the operator to set said controlling member in position for the reverse drive while the upper is held under tension for effecting the return of the upper-pulling means to its starting position.

11. In a machine for shaping uppers over lasts, the combination with power-operated means for pulling an upper over a last and for then holding it under tension with the machine at rest, of reversing mechanism arranged to be moved by the operator, while the upper is held under tension, into position for driving the machine reversely to return the upper-pulling means to starting position and to be held by the operator in reversing position until the machine has completed its reverse movement, a cam for preventing such movement of the reversing mechanism by the operator until after the pulling of the ,upper, and yieldable means controlling said cam and arranged to permit the cam to be held substantially stationary by the reversing mechanism during the reverse movement of the upper-pulling means and to return. the cam to its initial position upon release of the reversing mechanism by the operator.

12. In a machine for shaping uppers over lasts, the combination with power-operated means for pulling an upper over a last for then holding it under tension with the machine at rest, of a clutch through which said upper-pulling means is operated to pull the upper, means for tripping said clutch to start the machine in operating each upper, automatic means for operating said clutch to stop the machine at the end of the upper-pulling operation, and power-operated re verse driving means for returning the upper pull-- ing means to its starting position at the will of the operator while said clutch is inoperative.

13. In a machine for shaping uppers over lasts, the combination with power-operated means for pulling an upper over a last and for then holding it under tension with the machine at rest, of a driving member rotatable continuously in the same direction, a clutch for connecting said driving member to the upper-pulling means, means for tripping said clutch to start the machine in operating on each upper, automatic means for operating said clutch to stop the machine at the end of the upper-pulling operation, and reverse driving mechanism for connecting said driving member to the upper-pulling means at the will of the operator to return the upper-pulling means to its starting position while said clutch is inoperative.

14. In a machine for shaping uppers over lasts, the combination with power-operated means for pulling an upper over a last and for then holding it under tension with the machine at rest, of a driving member rotatable continuously in the same direction, m ans for effecting frictional ngagement with driving member to operate the upper pulling means to pull the upper, reverse driving mechanism constructed and arranged for independent frictional engagement with said driving member to return the upper pulling means to its starting position, and means movable by the operator while the upper is held under tension to render said reverse driving mechanism operative.

15. In a machine for shaping uppers over lasts, the combination with power-operated means for pulling an upper over a last and for then holding it under tension with the machine at rest, of a continuously rotatable driving pulley, clutch means within said pulley for connecting it to the upper-pulling means to effect the pulling oi the upper, and reverse driving mechanism located exteriorly of said pulley and including a member movable into engagement with the pulley for connecting the pulley to the upper-pulling means to return the latter to its starting position while said clutch means is inoperative.

16. In a machine for shaping uppers over lasts, the combination with power-operated means for pulling an upper over a last and for then holding it under tension with the machine at rest, of forward and rev vrse driving means, a member mo-v able by the operator to start the machine in the forward direction to effect the pulling of the upper, another member movable by the operator at will while the upper is held under tension to start the ma tie in the reverse direction to efiect the upper-pull ng means to its tion, and means me is into position act on said other member to return it to its idle position in automatically determined time relation to the reverse movement of the machine.

ill-n a machine for shaping uppers over lasts, the combination with power-operated means for pulling an upper over a last and for then holding it under tension with the machine at rest, of forward and reverse driving means, a member movable by the operator to start machine in the forward direction to efiect the pulling of the another member movable by the operator .at will while the upper is held under tension to the machine in the reverse direction to effect the return of the upper-pulling means to its initial position, and a cam arranged to act substantially at the end of the reverse movement of the machine to return said other member to its idle position.

18. In a machine for shaping uppers over lasts, the combination with power-operated means for pulling an upper over a last and for then holding it under tension with the machine at rest, of reverse driving mechanism for effecting the return of said upper-pulling means to its starting position, a member for controlling said reverse driving mechanism, a toggle arranged to be straightened by said member to move said mechanism into operating position and then to hold it automatically in that position, and automatic means for breaking said toggle to terminate the reverse movement of the machine when the upper-pulling means has arrived substantially in its starting position.

19. In a machine for shaping uppers over lasts,

the combination with power-operated means for pulling an upper over a last and for then holding it under tension with the machine at rest, of a clutch-through which said upper-pulling means is operated to pull the upper, a brake, means for releasing the brake and actuating the clutch to start the machine, reverse driving mechanism for returning said upper-pulling means to its starting position, a member movable by the operator while the upper is held under tension to render said reverse driving mechanism operative, and mechanism controlled by said member for effecting the release of the brake without actuating the clutch.

20. In a machine for shaping uppers over lasts, the combination with power-operated means for pulling an upper over a last and for then holding it under tension with the machine at rest, of a clutch through which said upper-pulling means is operated to pull the upper, a brake, a springoperated device movable to release said brake and to render the clutch operative to start the machine, reverse driving mechanism for returning said upper-pulling means to its starting position, a member movable by the operator while the upper is held under tension to render said reverse driving mechanism operative, means movable by said member to release said spring-operated device to the action of its spring, and mechanism controlled by said member for preventing said device from being moved far enough by its spring to render the clutch operative.

21. In a machine for shaping uppers over lasts, the combination with power-operated means for pulling an upper over a last in the first stage of a cycle of operations of the machine and for then holding it under tension with the machine at rest, power-operated means for laying the margin of the upper over the bottom of the last and for inserting fastenings to fasten it in another stage of the cycle, and mechanism for separating fastenings in the first stage of the cycle for delivery to the fastening-inserting means, of reverse driving means for returning the upper-pulling means to starting position after the pulling of the upper but before the completion of the cycle of operations to permit the first stage of the cycle to be repeated in operating on the same upper, and mechanism constructed and arranged to prevent separation of a second set of fastenings in the first stage of the cycle following such return of the upper-pulling means.

22. In a machine for shaping uppers over lasts, the combination with power-operated means for pulling an upper over a last in the first stage of a cycle of operations of the machine and for then holding it under tension with the machine at rest, power-operated means for laying the margin of the upper over the bottom of the last and for inserting tacks to fasten it in another stage of the cycle, and mechanism including a rotatable tack pot for separating tacks in the first stage of the cycle for delivery to the tackinserting means, of reverse driving means for returning the upper-pulling means to starting position after the pulling of the upper but before the completion of the cycle of operations to permit the first stage of the cycle to be repeated in operating on the same upper, a member movable by the operator to render said reverse driving means operative, and mechanism controlled by said member for holding the tack pot stationary substantially throughout the reverse drive and the first stage of the next cycle to prevent separation of a second set of tacks.

23. In a machine for shaping uppers over lasts, the combination with power-operated means for pulling an upper over a last and for then holding it under tension with the machine at rest, of a power shaft connected to said upper-pulling means, a driving member rotatable continuously in one direction, mechanism for connecting said driving member to the power shaft for operating the upper-pulling means to pull the upper, and reverse driving mechanism comprising rotatable members operatively connected together and movable in a direction transverse to the axis of said driving member to connect the driving memher to the power shaft for returning the upperpulling means to its starting position.

24. In a machine for shaping uppers over lasts, the combination with power-operated means for pulling an upper over a last and for then holding it under tension with the machine at rest, of a power shaft connected to said upper-pulling means, a driving member rotatable continuously in one direction, means for connecting said driving member to the power shaft for operating the upper-pulling means to pull the upper, a gear wheel on said power shaft, a second gear Wheel movable in a direction transverse to the axis of the power shaft into driving engagement with said first-named gear wheel, and a member op- 119 eratively connected to said second gear wheel and movable with it into position to be engaged and driven frictionally by said driving member for reversing the direction of the drive of the power shaft and returning the upper-pulling means to 5 its starting position, said second gear wheel being yieldable relatively to said frictionally driven member to insure proper engagement of the latter with the driving member.

WILLIAM THOMAS BUCKINGI-IAM ROBERTS.