US2062307A - Machine for operating on shoe parts - Google Patents

Description

Dec. 1, 1936. c. w GREENE MACHINE FOR OPERATING ON SHOE PARTS Filed April 22, 1955 y 3 Sheets-Sheet 1 Dec. l, 1936. Q W GREENE 2,062,307

' MACHINE FOR OPERATING ON SHOE lPARTS Filed April 22,v 1955 3 Sheets-Sheet 2 Dec. l, 1936. Q W, GREENE 2,062,307

MACHINE FOR OPERATING ON` SHOE PARTS Filed April 22, 1935 3 Sheets-Sheet 3 l Patented Dec. 1, 1936 UNITED STATES PATENT OFFICE 2,062,307 MACHINE FOR OPERATING ON SHOE PARTS Application April 22, 1935K, Serial No. 17,564

21 Claims.

This invention relates to machines for hotpressing and shaping shoe upper parts and, in the embodiment shown for the purpose of illustration, comprises a heated form having a trans- 5 verse curvature similar to but preferably less than that assumed by a lasted shoe upper and a cooperating presser member adapted to press the vamp portion of an unlasted shoe upper against the form with suicient pressure and for l a suiiicient time to cause a shape similar to that of the form to be imparted to the shoe upper. The machine is adapted for practicing the method disclosed in Letters Patent of the United States No. 2,015,090, granted September 24, 1935, in the name of Harold L. Sawyer.

An object of the invention is to provide an improved machine for use in shaping a shoe part, for example a vamp, to a desired contour, the shoe part being maintained in that condition under the inuence of pressure and heat for a predetermined time and then released.

Features of the invention consist in power-operated means for mechanically operating the form and presser member relatively to each other, thereby to apply pressure to the work, to maintain the pressure for a predetermined time and then to release the pressure. The duration of the predetermined time may be varied. In the illustrated machine, a cam slowly driven by power is connected by a heavy spring to the presser member and, upon starting of the cam in one direction, the presser member is pressed against the form through the spring. After the cam has made part of a revolution its direction of motion is automatically reversed and upon its return to its original position the pressure is relieved and the power disconnected from the cam. The point during the rotation of the cam at which its motion is reversed may be varied and hence the period during which the power is maintained under pressure may be changed to suit varying conditions.

Another feature of the invention consists in an improved presser member comprising a iiexible sheet, preferably lined with felt, the side portions of the sheet being connected to members pivoted by links toa rigid lever operated by the aforesaid cam. Movement of the lever toward the form causes the middle portion of the exible sheet to press upon the form, and the action of the links then forces the side members against the form. A spring is provided to separate the side members when the pressure is relieved.

The illustrative machine is duplex, both sides of the machine being driven from the same source of power between which and the respective cams on opposite sides of the machine automatically operated reversing mechanism is provided.

These and other features of thek invention will appear more fully from the detailed description when read in connection with the accompanying drawings and will be pointed out in the appended claims.

In the drawings,

Fig. 1 is a perspective view of a machine embodying the present invention;

Fig. 2 isa side elevation, partly in section, of the machine;

Fig. 3 is a perspective view, partly broken away, of an illustrative closed shoe upper, the vamp portion of which the machine of the present invention is designed to treat; i

Fig. 4 is a transverse section takenA through the heated form and presser member illustrating the operation of the presser member; 20

Fig. 5 is a perspective view of a safety mechanism with which the machine is provided;

Fig. 6 is a perspective view illustrating the gearingconnecting the source of power toA the mechanism for operating the presser member at each side of the machine;

Fig. 7 is a sectional detail of parts shown in Fig. 6; and

Fig. 8 shows in perspective details of parts shown in Figs. 6 and 7.

The illustrated machine for hot-pressing and shaping the vamp portion of aclosed shoeV upper for the purpose, for example, of -causing thermoplastic cement betweeny the upper and the lining to be activated and to give the upper a preliminary shape similar tothat which it will have to assume in the completed shoel is provided with a frame In upon which is a table I2. On the table I2 are mounted two heated forms' I4, I6, each-of which contains a heating element I8 (Fig. 4) connected by suitable conductors 20 (Fig. 1) to a junction box 22 to which electric energy is. supplied, a switch 24' being provided to control the currentV supplied to the heating elements I8. To protect the operators hands from coming into contact with the heated forms I4, I6, an insulatedshield 26 is provided in front of each of the two forms. The topf portion of each form I4, I6 is substantially cylindrical in shape, the preferred curvature being somewhat less than that which the shoe upper will assume after it has been drawn over a last. The lower portions of the forms nare outwardly and downwardly giving the form the general shape of a truncatedv Wedge.

The construction of presser members 38, 32, with one of which each form is provided, is best shown in Fig. 4, where 34 indicates an outer shell of thin steel or the like, side portions or flanges of which are secured by screws 36 to side presser members 38, 48. Inside the shell 34 is a thick layer 42 of resilient material, for example soft rubber, and inside the rubber is a layer 44 of felt. The felt layer 44 and rubber layer 42 are preferably held in place by metallic clips secured to the members 38, 48 by screws 36 and having their inner edges bent up against the felt layer. In order to provide a wearing surface to protect the felt, it is preferable to line the presser member with fabric, the lower edges of which may be tied at 4| (Fig. 4) to the projecting ends of the screws 36 and the 'upper portion of which may be held in place by strips 46 (Figs. 1 and 2) of adhesive tape or the like. The side presser member 38 is connected to one arm 48 of a lever the other arm 58 of which carries a stop screw 52 adapted to engage a hea-d 54 to one side of which the lever 48, 58 is pivoted at 56. On the othervside of the head a similar lever 58, 68 is pivoted at 62, the upper arms 58, 68 of the levers being connected by a tension spring 64 which, when allowed to act, swings the levers 48, 58 and 5B, 68 in opposite directions, thus separating the side pressers 38, 48 and causing the presser member 88 to open. It will be obvious that when the head 54 is raised the spring 64 will act to separate the side pressers 38, 48, and the arms 48, 58 will extend downwardly with only a slight inclination toward each other.

When work which may consist, as shown in Fig. 3, of a closed shoe upper having a vamp A, a quarter B and a lining C, is placed over the form i4 and the head 54 moved downwardly, the curved center portion of the presser member 38 will rst engage the work in the region of the curved top of the form and continued downward movement of the head 54 will cause the spring 64 to be stretched and the side pressers 38, 48 to be moved toward each other to apply pressure to the side portions of the presser member 38. Thus, the work will be wrapped about the form and held tightly to the form while receiving heat therefrom to shape and set it. The upper front portion of the presser member 38 may be cut away at 66 so as not to apply pressure to the upper part of the throat portion of the upper, and usually there is no advantage in applying pressure to the tip portion of the vamp and lining, which layers must subsequently be separated to receive a toe box. Hence, the cooperating portions of the fo-rm |4 and the presser member 38 do not extend beyond the tip line of the vamp.

It will be understood, of course, that the presser member 32 which cooperates with the form I6 has a construction and mounting identical with that described for the form |4 and presser member 38 and, in fact, that the half of the machine at the right of a central vertical plane extending from front to rear of the machine is duplicated on the other side of that plane, the parts where necessary being made right and left to give the machine as a whole substantial bilateral symmetry with respect to said plane. Particular attention will continue to be paid in the description to the right-hand side of the machine, it being understood that the two sides are operated alternately, receiving power from the same source which, as shown in Fig. 2, may be an electric motor 78 mounted on the rear portion of the machine frame and connected by a belt "l2 to a pulley 'I4 (Figs. 2 and 6) fixed to a shaft 16 on which is a pinion 'i8 which meshes with a large gear 88 xed to a counter shaft 82. On the counter shaft 82 is loosely mounted a large gear 84 similar to the gear 88. A long pinion 86 mounted on a shaft 88 having bearings in the frame has one end meshing with the gear 84 and the other end meshing with a pinion 98 similar to the pinion 'F8 and xed on the same shaft 16. The long pinion 86 serves, of course, as a reversing gear so that the large gear 84 will be rotated on its shaft in one direction and the gear 88 and its shaft will be driven in the opposite direction. Loosely mounted on the shaft 82 are two clutch sleeves 92 and 94, a detail of one of which is shown in Fig. 8. The sleeves 92 and 94, which of course are freely slidable longitudinally of the shaft 82, are provided on each of their ends with clutch teeth 96 which, in the case of the sleeve 94, cooperate at one end with clutch teeth 98 carried by the gear 88 and at the other end with similar clutch teeth carried by the gear 84. Similarly, the teeth on the clutch sleeve 92 cooperate at one end with teeth carried by the gear 84 and at the other end with teeth carried by a member |88 xed to the shaft 82 and, of course, driven in the same direction as the gear 88. It will be seen that each sleeve has a neutral position in which it will be at rest and that each, when moved to the right, will be driven in one direction and, when moved to the left, will be driven in the opposite direction.

In order tc lessen the shock of engagement of the teeth 86 on the opposite ends of the sleeve members 92 and 94 with the cooperating driven clutch teeth 98 with which they engage, the construction illustrated in Fig. 8 in connection with the gear 88 is provided. On the inner face of the gear 88 there are six lugs |82 integral with the gear. Mounted on the hub portion |84 of the gear 88 is a spider member |66 which has a number of vanes |88 corresponding to the number of lugs |82, each vane |88 resting against the rear face, considering the direction of drive, of one of the lugs |82. Between each vane |88 and the next lug |82 at the rear of it is a spring ||8. The teeth 98 with which the teeth 96 engage are formed on the spider 86 and project inwardly at the same distance from the axis of the shaft 82 as the teeth 96 so that when, for example, the sleeve 94 is moved toward the right in Fig. 6 and the teeth 96 engage the teeth 98 of the spider |86 carried by the gear 88 which is being driven in the direction indicated by the arrows in Figs. 6 and 8, the spider will yield slightly against the springs ||8 and the shock of engagement will be taken up. A cover ring H2 (Fig. 8) having an annular ange ||4 is tted over the lugs v|82 and is secured in place by three screws threaded into the alternate lugs |82. The annular flange ||4 prevents axial displacement of the vanes |88 on the spider. A spider |86 of similar construction is provided on each face of the gear 84 and on the member |86. Collars ||6, one on each side of the gear 84, help to hold the spiders in place and prevent movement of the gear 84 longitudinally of the shaft. Similar collars ||8 are provided to prevent displacement of the spider |86 in the gear 88 and in the member |88. The clutch sleeves 92, 64 are each provided with pinion teeth |28 which, in the case of the sleeve 92, mesh with the teeth of a large gear |22 (Fig. 2) to which is secured a pinion |24 which meshes with a large gear |26 in the outer face of which 7`51 a'cam. track |28; is formed'. vIt will be understood that the sleeve 94 is connected by similar gearing to a similar cam |29 (Fig. 1) for operating the left-hand side of the machine, said cam being arranged to face in the same direction. Engaging the cam track |28 is a roll |30 mounted on a lever |32 pivoted at |34 to the machine frame at its rear end and at its front end being connected by a link |36 to an arm |38 of an angle lever pivoted at |40 to the machine frame. The other arm |42 of the angle lever is pivoted to the lower end.- of a rod |44 having a reduced upper end portion |46` that passes through a block |48, through a washer-like collar |50, through a coil spring |52, through a washer |54, and has a nut |56 threaded on its upper end. The block |48 has chamfered corners and normally rests against a nut |58 threaded on the larger portion of the rod |44 and the tension of the spring |52 may be adjusted by turning the nut |56. The spring |52 may be enclosed by a sleeve member fixed to the washer |50 and in which the washer |54 is adapted to slide when the spring is compressed. The block |48 is pivoted between transverse webs |60 connecting the two parts |62, |64 of a double lever pivoted at its rear end on a shaft |66 and integrally connected at its front end to the head |54. The block |48 has recesses in its opposite sides which are engaged by pins |51, one of which is shown in Fig. 1, the pins being held by set screws in holes extending transversely of the lever |62, |64 at right angles to its length.

It will be seen from Fig. 2 that the cam track |28 starts at a point about half way of the radius 5. of the cam, extends toward the periphery and then extends concentrically about the greater portion of the circumference of the cam. Therefore, when the gear 26 is rotated in the direction of the arrow the cam roll |30 will be moved up= wardly, operating the lever |32 to push upwardly on the link |36 which will rotate the angle lever |38, |42 in a clockwise direction, pull downwardly on the rod |44 and move the head 54 and its presser member 30 downwardly, causing the y, presser member to engage the work placed upon the form |4. When the center portion of the presser member 30 is arrested by the' form, the side pressers 38, 40 will be pressed inwardly and when the opposition of the form to their further inward movement becomes great enough the spring |52 will be compressedrand thus all portions of the work will be held firmly against the heated form i4. Of course this action of the presser member occurs while the roll |30is passing from the inner portion of the cam track to the peripheral portion, and the pressure may be maintained during substantially a complete rotation of the cam gear |26 and during its reverse movement until the roll |30 again enters the inner portion of the cam track, whereupon the pressure will be relieved and the presser raised away from the work.

The'means for controlling the movement of the clutch sleeve 92 toward the left (Fig. 6), then to the right and then to the neutral position shown,

15; be seen that a push on the rod will throw the clutchl sleeve 92 into engagement with the teeth- 98 on theV member |00, thus causing; the cam gear |26 to be driven inavclockwise direction, vas indicated in Fig.'6, and that ka, pull on `the rod will cause the other end of the clutch sleeve to engage the teeth 9.84 on the gear 84 which are being driven in the opposite direction, thus causing the direction of motion of the cam gear |26. to be reversed- The forward portion of the rod |80; is enlargedandi slotted atv |82 (Fig. 2), the slot being engaged by the central pivot |83 of a toggle comprising a link |84 pivoted to. the outer end of the shaft upon which the gear |26 isl mounted anda link |86 pivoted to a lever |88, which lever is fulcrumed at |90 and is urged upwardly by tension springs |82 the lower ends of. which are connected to the lever between its ends and the upper ends of which are secured to a pin on the machine frame I0. Of course, if desired, a single spring of suitablestrength may be used. The forward end of the rodl |80 is connected by a link |94 to the lower arm |96, of a lever pivotedbetween its ends at |98 to the machine frame and having at. the upper end of its otherarm 200 a transverse projection 202 which normally engages the thin forward end 204 of. a. latch member 206 pivoted at 208 to the machine frame and having its inner end normally held down, by a, spring 2|0 against a pin 2|2 on the frame. The end 204 of the latch member rests against the transverse projection 202, thus preventing` forward movement of the arm 200 of the lever |96, 200. While the lever |96, 200 is thus prevented from moving in a counterclockwise direction, the clutch sleeve 92 is in neutral position, as shown in' Figs. 6 and '7, and the right-hand side of the machine is at rest. Thev tension of the springs |92-, however, istending by its upward pull on the lever |98 to break further the toggle |84, |86. and cause the pivot |83: to push rearwardly on the rod |80. The forward end of the latch member- 206 is, connected. by a rod 2| 4- to a treadle 2|6 pivoted at 2|8 to themachine frame depression. of which will lift the thin forward end 204 abovethe trans'- verse projection 202 and allow the lever |96, 200 to move in a counterclockwise direction under the influence of the springs |92 and the rod to be pushed rearwardly, causing the clutchfsleeve 92 to be shifted towardv the left in Fig. 7 into clutching engagement` with the member which is being driven by the motor in a. clockwise direction, and which then, through the reducing gears |22, |24, slowly drives the cam gear |26- in a clockwise direction, causing the presser mem:- ber to be pressed on the work applied to the form |4, as has been described.

Onk the hub portion of the cam gear |26 is secured a. disk.22.0 (Figs. 1 and 2) in which is a series of holes 222 and. on which is a fixed lug 224 through which is threaded an adjustable contact screw 226. A screw 228 may be placed in any one of the holes 222-l and, when placed `as shown in Fig. 2, permits about two thirds of a revolution of the cam gear |26 before'itengages the link |84 of the toggle |04,v |86. When it does so engage the toggle, the. toggle is rst straightened against the tension of the springs 92 and, when the toggle is movedpastitscenter or straight position, the springs |92 react to force the'pin |83 against the forward end of 'the'slot |82, causing the rod |80 to be pulled forward` and the clutch sleeve 92 to be shifted to the right in Fig. '7' out of engagement with the teeth on j' the member |00- and into clutchingA engagement with the clutch teeth on the gear 84 which, of course, is moving in the opposite direction to the member |00. During this action the lever |96, 200 is moved in a clockwise direction, allowing the latch member to be drawn by its spring 2|0 into the position shown in Fig. 2 with its thin forward end 204 in alinement with the lateral projection 202. The cam gear |26 is now moving in a counterclockwise direction and, when the contact screw 226 engages the link |84 of the toggle, the toggle is moved from its forwardly bent position first into a straight position and then past the center, whereupon the springs |92 push the rod rearwardly; but since counterclockwise movement of the lever |96, 200 is prevented by the latch member 204, they can only move the clutch sleeve to the left (Fig. 6) far enough to disengage the clutch teeth from the gear 84, whereupon the cam gear |26 comes to rest in the position shown in Fig. 2, where of course the pressure of the presser member 30 has been released.

When the treadle 2 |6 is operated to release the latch 204 from the lateral projection 202 of the lever arm 200, it is desirable to provide yielding means for holding the lever arm in its forward position with the clutch sleeve 92 in clutching engagement with the member |00 and prevent accidental movement thereof out of such clutching engagement. For this purpose an arm 230 is pivoted at 232 to the machine frame and a detent 234 is pivoted to the arm at 236 so that it can swing rearwardly but is prevented from swinging forwardly by a ledge 238 on the arm. A link 240 is pivoted to the arm 230 above the detent and has its lower end portion pressed against the detent 234 by a spring 242. As shown in Fig. 2, the flat lower end of the detent rests against a flat top portion 244 of the arm 200 and when that arm is released by the latch 204 and moves forwardly the detent drops over the rearward face of the portion 244 to prevent unintended forward movement of the arm 200. When, however, the lever arm 200 is forced in a clockwise direction, the detent swings rearwardly against the tension of the spring 242 until it slips off the rear edge of the portion 244 and reassumes the position shown in Fig. 2.

In order to prevent undesired movement of the gearing due to its momentum after the clutch sleeve 92 is moved to neutral position, a brake is provided which comprises a band 246 secured (Fig. 6) to the lower end of a square bar 248 mounted for longitudinal movement in the frame and having at its upper end a split clamp 250 to limit its downward movement. The band 246 passes about a drum 252 formed on the gear |22 and has its other end secured to a pin 254 on an arm 256 extending downwardly and rearwardly from the lever |32. When the lever |32 is moved downwardly by the cam |28, the arm 256 thereon moves rearwardly in a direction to tighten the band 246 upon the drum 252, thus quickly bringing the moving parts to rest.

A manually operable pressure-releasing lever 260 is provided by movement of which forwardly the operator may release the pressure of either or both of the presser members. As best shown in Fig. 5, which represents the mechanism at the left-hand side of the machine, the pivot |66 of the double lever |62, |64 is carried by a link member 262 the ends of which are guided for vertical movement in slots 264 formed in upstanding portions of a bracket 266 bolted to the table I2. Below the member 262 is a horizontal shaft 268 journaled in the bracket 266 and having thereon a lower link member or yoke 210 the arms 212, 214 of which are pivoted to a downwardly extending portion 216 of the member |62 by a pin extending through them and through the portion 216, the pin being secured therein by a set screw 218. It will be seen that the yoke 210 and the member 262 thus form a toggle which is normally straight and is prevented from being broken in a rearward direction by interengaging surfaces at 280 formed respectively on the member 262 and on the arm 212. The toggle may, however, be broken in a forward direction by operation of the lever 260 which is pivoted at its lower end on the shaft 268 and has interengaging connections with a collar 282 fixed to the shaft 268 which, in turn, is fixed to the yoke 210. The forward movement of the lever therefore will break the toggle 210, 262 forwardly and hence move downwardly the rear ends of the double lever |62, |64 so that, if the head 54 thereon is in pressing position, it will move upwardly and the pressure be relieved. The right-hand side of the machine is provided with a toggle mechanism similar to that described and connected in a similar manner to the same lever 260 so that if either one or both of the presser members is in pressing position forward movement of the lever 260 will release either one or both. 'Ihe lever 260 is maintained in its rearward position with a stop screw 284 in contact with a shelf 286 mounted on the brackets 266 by means of a spring 268 connected at one end to a lever above its pivo-t 268 and at the other end to a pin on the lower side of the shelf 286.

A junction box 290 for the motor is mounted on the shelf 286 and is provided with a motor starting switch 292.

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 for pressing parts of shoe uppers together, the combination of a form, a presser member, a cam for relatively actuating the form and presser member to press the Work between them, reversing mechanism for rotating the cam rst in one direction to apply pressure and then in the opposite direction to release it, and toggle means actuated by the cam for operating said reversing mechanism.

2. In a machine for pressing shoe parts together, the combination of a form, a presser member, a rotary cam, connections therefrom for relatively actuating the form and presser member to press the work between them, poweroperated means for rotating the cam first in one direction and then in the other, and means actuated by rotation of the cam for causing rotation of the cam to be reversed.

3. In a machine for pressing shoe parts together, the combination of a form, a presser member, means for relatively actuating the form and presser member to press the work between them comprising a cam movable in one direction to apply pressure and in the opposite direction to release it, power-operated means for rotating the cam first in one direction and then in the other, and means actuated by rotation of the cam for determining the point in its rotation when its motion will be reversed.

4. In a machine for pressing shoe parts together, the combination of a form, a presser member, a rotary cam for relatively actuating the form and presser member to press the work between them, power-operated means for rotating the cam rst in one direction to apply pressure and then in the opposite direction to release it, and means forvarying the interval between the application of pressure and the release of pressure.

5. In a machine for pressing shoe4 parts together, the combination of a form, a presser member, a rotary cam for relatively actuating the form and presser member to press the work between them, power-operated means for giving the cam a partial rotation first in one direction to apply pressure and then in the opposite direction to release it, a pin on the cam, a bent toggle actuated by the pin to straighten the toggle, and means operated by the toggle for reversing the direction of motion of the cam.

6. In a machine for pressing shoe parts t0- gether, the combination of a form, a presser member, a rotary cam, connections therefrom for relatively actuating the form and presser member to press the work between them,.poweroperated means for rotating the cam rst in one direction and then in the other, a toggle arranged to be broken in either of two directions to control the direction of rotation of the cam, and means carried by the cam for breaking the toggle first in one direction and then in the other.

'7. In a machine for pressing shoe parts together, the combination of a form, a presser member, a rotary cam, connections therefrom for relatively actuating the form and presser member to press the work between them, power-operated means for rotating the cam first in one direction and then in the other, a toggle karranged to be broken in either of two directions to control the direction of rotation of the cam, means carried by the cam for breaking the toggle rst in one direction and then in the other, and means for preventing the second breaking of the toggle from being eiective to reverse the cam.

8. In a machine for pressing shoe parts together, the combination of a form, a presser member, a rotary cam for relatively actuating the form and presser member to press the work between them, power-operated means for giving the cam a partial rotation first in one direction to apply pressure and then in the opposite direction to release it, a pin on the cam, a toggle held in bent condition by yielding means and actuated by the pin to straighten the toggle and to carry it beyond its straight position, and means operated by breaking of the toggle in the opposite directiony for reversing the direction of motion of the cam.

9. In a machine for pressing shoe parts together, the combination of a form, a presser member, a rotary cam for relatively actuating the form and presser member to press the work between them, reversing mechanism for rotating the cam in either direction and having a neutral position to stop the cam, a toggle capable of being broken, l

in either direction, yielding means arranged to cause the toggle to break in either direction when its joint is moved beyond the straight position, means connecting the joint of the toggle to the reversing mechanism, and means on the cam for actuating the toggle to reverse said mechanism and thereafter to straighten the toggle to set the reversing mechanism in neutral position to stop the cam.

10. In a machine for shaping shoe parts, a con- Vex form, a presser member movable relatively to the form, a cam for operating the presser member, reversing mechanism for driving the cam in eitherdirectioma toggle connectedto thereversiing mechanism and so arranged "thatiwhen 'the toggle is broken in one direction the cam will be driven in one direction and when the toggle is broken in the other `.direction the cam will be oppositely driven, means ytending to break the toggle, and means operated byr the cam'for causing the toggle to break first inone direction and then in the other. y 1,1. 11. In a machine fori-shaping ,shoe parts, acon- Vex form, 'a presser member movable relatively to the form, a Acam for operating the 'presser member, reversing mechanism for driving'the cam in either direction, a toggle connected to the reversing mechanism and lso arranged that when the toggle is broken inone direction the cam will be ydriven in one direction and when the toggle is broken inthe other direction the cam will be oppositely driven rand when'the toggle .is nearly straight the cam will not be driven, means ,onthe cam for straightening the toggleA and for ,permit-A ting it toy vbreak in the other Ydirection to reverse the cam, other means on the `cam to straighten the toggle to stop the cam, and manually releasable means for preventing breaking 'of thetogglein the rst direction to start the cam. ,l t

12. In a machine `ior pressing shoe parts to# gether, the combinationofa form, a presser member, a rotary cam for relatively actuating .the form and presser member to press rthe work between them, reversing mechanism for rotating the cam in either direction and havinga neutral position to stop the cam, a toggle'capable of being broken ineither direction, yieldingv means ar-A ranged to cause the toggle to breakin eitherdirection when its joint is vmoved beyondthe straight position, meansconnecting the 'joint of the toggle to the reversing'mechanism, means ion the cam for actuating the toggle toreverse said mechanism and thereafter to straighten the tog-v gle to set the reversing .mechanism in neutral position to stop the cam,mean`s` including a latch to hold the togglenearlystraight to maintain'the reversing mechanism in neutral' position, and manually operated means to release the latch;

13. In a machine for pressing shoe upper parts, a heated form, a presser member cooperating with the form, a lever connected to the presser member at one end, power-operated means for actuating the lever to bring the'form and presser member together, and manually operated means connected with said lever for releasing the powerfapplied pressure.

14. In amachine for pressing shoe upper parts, a form, a presser member cooperating with the form, a lever connected to the presser member at one end, a normally xed pivot for the opposite end of the lever, power-operated means connected to the lever between its ends for actuating it, and manuallyoperated means for lowering the' rear end of the lever to release the pressure of vthe presser member comprising a toggle connected to the rear end of the lever.'

l5. In a machine for pressing shoe upper parts, a form, a presser member cooperating withl the form, a lever connected to the presser member at one end, a normally xed pivot for the opposite end of the lever, power-operated means connected to the lever between its ends for actuating it,v a toggle connected to the pivot of the lever arranged to be under compression when the power pressure is applied, and manually operated means l the forms, levers each connected to a presser member at one end, normally Xed pivots for the opposite ends of the levers, power-operated means connected to each lever between its ends for actuating it, a toggle connected to the'pivot of each lever arranged to be under compression when the power pressure is applied, and manually operated means for breaking both toggles to release the pressure on either or both toggles.

y 17.7In a machine for pressing shoe parts, a convexA form, a head movable relatively to the form, levers pivoted between their ends to said head, side pressers pivoted to the lower ends of the levers, a ilexible pressing member extending over the form and connected to the side pressers, a tension spring connecting the upper ends of the levers to separate the pressing members, and means for operating the head to wrap the flexible presser member about the form and apply said pressers to the sides of the form inlopposition to said spring.

18. In a machine for pressing shoe parts, a convex form, a head movable relatively to the form, levers pivoted between their ends to said head, side pressers pivoted to the lower ends of the levers, the lower arms of said levers being inclined inwardly toward the form and acting as links when the head is depressed tovforce the presser members against the sides of the form, and means for operating the head to cause the presser members to be pressed upon the form.

19. In a machine for shaping shoe parts, a form, a presser member movable relatively to the form, a cam for operating the presser member, reversing mechanism for driving the cam in either direction, a toggle connected to the yreversing mechanism and so arranged that when the toggle is broken rearwardly the cam will be driven in a direction to apply pressure and when the toggle is broken forwardly the cam will be driven in a direction to release pressure, means tending to break the toggle when the toggle is moved beyond its center in either direction, means operated by the cam for causing the toggle to break first 'forwardly and then rearwardly, means for preventing rearward breaking of the toggle substantially beyond its straight position to cause the cam to stop, and means for releasing the toggle to permit it to break rearwardly to start the cam.

20. In a machine for shaping shoe parts, a form, a presser member movable relatively to the form, a cam for operating the presser member, reversing mechanism for driving the cam in either direction, a toggle connected to the reversing mechanism and so `arranged that when the toggle is broken in a rearward direction the cam will be driven in a direction to apply pressure, when the toggle is broken in a forward direction the cam will be positively driven to release pressure and when the toggle is nearly straight the cam will not be driven, means on the cam for straightening the toggle and permittng it to break in the forward direction to reverse the cam, other means on the cam to straighten the toggle to disconnect the cam from the reversing mechanism, and a brake band operated by the cam for arresting motion of the cam.

2l. In a machine for shaping shoe parts, a form, a presser member movable relatively to the form, a cam for operating the presser member, reversing mechanism for driving the cam in either direction, a toggle connected to the reversing mechanism and so arranged that when the toggle is broken in a rearward direction the cam will be driven in a direction to apply pressure, when the toggle is broken in a forward direction the cam will be positively driven to release pressure and when the toggle is nearly straight the cam will not be driven, means on the cam for straightening the toggle and permitting it to break in the forward direction to reverse the cam, other means on the cam to straighten the toggle to disconnect the cam from the reversing mechanism, a latch for preventing breaking of the toggle in the rearward direction to start the cam, and a treadle for releasing the latch. y

CHESTER W. GREENE.

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