US2085851A - Pressure mechanism for heelattaching machines - Google Patents

Description

July 6, 1-937. J. GOULDBOURN ET AL 2,085,351

PRESSURE MCEIAKISM FOR HEEL ATTACHING MACHINES Filed Dec. 17, 1935 3 Sheets-Sheet l July 6, 1937. I

J. GOULD-BOURN ET AL 1 PRESSURE MECHANISM FOR HEEL AT'IACHING MACHI NES 3 Sheets-Sheet 2 Filed Dec. 17, 1935 y 1937. J. GOULDBCSURN ET AL I 2,085,851

PRESSURE MECHANISM FOR HEEL ATTACHING MACHINES Filed Dec. 17, 1935 3 Sheets-Sheet 3 Patented July 6, 1937 UNITED STATES PATENT OFFICE PRESSURE MECHANISM FOR HEEL- ATTACHING MACHINES poration of New Jersey Application December 17, 1935, Serial No. 54,858 In Great Britain January 1, 1935 22 Claims.

This invention relates to machines for attaching heels to shoes, and especially to means for applying pressure to the work to resist the oper ating forces.

Machines for attaching heels to shoes are generally known either as inside heel-attaching machines or outside heel-attaching machines. In the former, heel-attaching fastenings are inserted from the inside of the shoe through the heel- 10 seat into the heel, while in the latter, such fastenings are inserted from the outside through the heel and into the heel-seat.

In both kinds of machines, the shoe and heel are usually pressed firmly together before the 15 heel-attaching fastenings are inserted and are so held during the insertion, and the present invention is chiefly concerned with providing in a heelattaching machine simple and highly eflicient mechanism, preferably including some such fluid n as oil, for obtaining the initial and continuing pressure.

The work-positioning and retaining mechanisms disclosed herein are made the subject of an application for Letters Patent of the United States in the name of Joseph Gouldbourn, filed December 17, 1935, Serial No. 54,859.

The various objects and the several features of the present invention, in connection with either of the kinds of heel-attaching machines hereinbefore referred to, will become apparent from a consideration of the following description, given by way of example, of a particular embodiment of the invention, which will be hereinafter illustratively described, with reference to the accompanying drawings, in connection with a heelattaching machine of the general character of that disclosed in Letters Patent of the United States No. 1,195,134, Gouldbourn, August 15, 1916.

In the drawings,

40 Fig. 1 is a left-hand side elevation of the upper part of said patented heel-attaching machine, embodying this invention;

Fig. 2 is a side elevation, partly in section and to a larger scale, of the upper part of the machine 45 shown in Fig. 1;

Fig. 3 is a front elevation, partly in section, of part of the pressure mechanism shown in Figs. 1 and 2;

Fig. 4 is a plan view of mechanism for posi- 50 tioning a shoe in the machine;

Fig. 5 is a section on the line VV of Fig. 4, and

I Fig. 6 is a section on the line VIVI in Fig. 2.

The means for pressing a shoe and heel to- 55 gether and holding them so pressed while heelattaching fastenings are inserted may include a vertical plunger I (Fig. 2), which, at its lower end, supports work-pressing devices. The plunger is arranged to reciprocate in the machine-frame 3. It has at its rear side a vertical rack 5 engaged by a gear-segment 1 on the forward end' of an arm 9 secured on a horizontal shaft ll extending laterally of the machine and rotatable in the frame 3. v The segment-arm 9 may be actuatedto move the plunger downwardly by 10 mechanism including a treadle l2 and other parts similar to those of the previously-mentioned patent,-by which preliminary pressure is applied to the work, and the power-operation of the machine is initiated. Formed in the plunger l is a cylindrical fluid-containing chamber l3, which is closed at its lower end and at its upper end is enlarged somewhat and is open. A cylindrical tube I 5 is secured on the machine-frame by screws H, H and extends downwardly into the chamber l3, the plunger l fitting and sliding about its exterior. Threaded into the tube I5 at its upper end is a spring-adjusting collar l9, having above the upper end of the tube a flange 2| in which are shown radial holes to receive a bar by which the collar is may be turned and adjusted longitudinally of the tube. The lower end of the tube has secured in it a valve member 23 having a vertical central bore 25 and between this and the outer Wall of the member a number of smaller vertical bores. One of these smaller bores is shown at 21, opening through the top of the valve member 23 and into an enlarged portion 29 of the central bore 25 near but inside the lower end of the valve member. A valve-plate 3|. is seated on the top of the member 23 and there normally closes the bores 21. This valve-plate is pressed down against the upper end of the valve member 23 by a coil-spring 33 confined in the tube l5 between the valve-plate and the collar l9. By adjusting the collar, the pressure of the spring against the valve-plate and the resistance to movement of said plate may be varied.

Slidingly mounted in a bore in the spring-adjusting collar [9 and in the bore 25 in the valve member 23 is a tubular piston 35, which passes through the spring 33. This piston at its upper end is secured in a carrier 31 extending downwardly at the front of and partly around the upper portion of the machine-frame. At each side, the piston-carrier has formed in it horizontal grooves 39, which receive the forward rounded ends of arms M of a forked lever 43 by which the piston is moved up and down. The lever 53; is fulcrumed on a horizontal shaft 45 extend- 55 ing laterally of the machine and secured in the machine-frame. The rear end of the lever has pivotally connected to it the upper extremity of a downwardly-extending rod 4?, which at its lower end is connected to a crank-operated toggle 49, as in the Gouldbourn patent. When, during the power-operation of the machine, the toggle is straightened, the piston 35 is moved down positively. This piston has extending axially through it a valve-rod 5|, the lower end of which has secured on it a valve 53 arranged to close the lower opening of the bore 25 in the valve member 23, so that fluid in the bottom of the chamber !3 below the valve member is locked in said chamber. The enlarged upper end 55 of the valve-rod 5! has a vertical slot which receives the rounded forward end 51 of a valve-operating lever 59 fulcrumed on a horizontal shaft 6i extending across the machine-frame. The valve-operating lever 59, at its rear extremity, is connected by a rod 53 to a lever 65 actuated in the operation of the machine, similarly to that in the previously-mentioned patent which effects the clamping engagement of the friction-plates.

The tube i5 has formed in it above the valveplate 3|, a number of openings 51, which allow fluid to pass from the enlarged portion of the chamber i3 in the plunger i into the inside of the tube. The top of the valve member 23 has a number of recesses. one of which is shown at 59, formed in it between the bores 21 in the wall of the member. Through these recesses, fluid passing through a central opening in the valve-plate 3| surrounding the piston 35 can flow through the bore 25 in the valve member 23 when the piston is raised. If the valve 53 at the bottom of the member is open, the fluid can pass into the bottom of the chamber I3 below the valve member.

When the machine is at rest, the plunger l is held in its raised position by a spring acting upon the treadle mechanism. The piston 35 is raised so that its lower end is above the bottom of the recesses 59 in the valve member 23, and the valve 53 at the bottom of the valve mem ber is open. Consequently, the fluid can flow freely from the enlarged upper portion of the chamber i3 through the openings 61 in the tube i5, through the central opening in the valveplate 3| and the recesses 58, and then down the bore 25 in said valve member and through the open valve 53 into the bottom of the chamber 13. After a shoe and heel to be attached thereto have been positioned between a. work-pressing post i85 carried at the bottom of the plunger I and a die-block I85 of the nailing mechanism of the machine, the plunger is lowered by the arm 9 and the treadle mechanism to apply preliminary pressure to the work. Duringthe lowering of the plunger, the fluid in the chamberl3 flows from the upper enlarged portion into the lower portion of said chamber. Continued depression of the treadle puts the machine into op eration under power, as described in the Gouldbourn patent, and during the powerwycle,

the piston 35 is positively lowered by the toggle-- lever 49. In its descent, the piston first closes the recesses 59 in the upper end of the valve member 23 and then forces, through the pressure thus applied to the fluid in the chamber I3, the plunger I downwardly to urge the con-- tact members. on the post I85 against the work. When this travel ef the plunger is stopped by the work, downward movement of the piston 35 forces the fluid in the bottom of the chamber [3 up through the holes 21 in the wall of the valve member 23 and past the valve-plate 3! on said member against the pressure of the spring 33. The amount of this final pressure applied to the work by the pressure devices is controlled by the spring 33, which may be adjusted by the collar i9 to vary its resistance and thus the force applied by the piston through the cylinder and its contained fluid. according to what is required by the character of the work. After the downward stroke of the piston has been completed, the valve 53 is raised, by its connections to the lever 65, toclose the opening at the bottom of the valve member 23. The fluid in the lower part of the chamber i3 is therefore locked thereinand upward movement of the plunger i and the post I85 is prevented during the insertion of heel-attaching fastenings. After this, the valve 53 is opened and the piston 35 is raised by their operating mechanisms. If the treadle has been released, the plunger is raised by a spring 72 associated with the treadle mechanism, the elements being thereby restored to I their initial positions.

The means for positioning a shoe in relation to a heel which is to be attached thereto may include a band-clamp H (Fig. 4), which is arranged to engage the back and sides of the heel end of the upper of the shoe and to enter the crease formed by the upper and outsoie. This band-clamp is preferably in the form of a stripof thin sheet-metal, bent to furnish opposite arms having substantially the shape of the heelend of a shoe. The forward ends of the bandclamp have laterally extending ears i3, "i3 pivotally connected to the forward ends of arms 15, T! of a pair of levers which are fulcrumed at the rear on a vertical stud 19 secured in a horizontal slide 81 which is adjustable horizontally forwardly and rearwardly of the'machine. An ear 83 extends rearwardly from the bandclamp and is connected by a vertical pivot 85 to the band-clamp-slide 8!. The band-clamplevers l5 and Ti have, respectively, extending rearwardly and to the right from them, arms 81 and 89, carrying on vertical pivots cam-rolls 9!, 93, respectively. These cam-rolls are respectively urged towards two cams 35 and 91 by a spring 99 connecting the arms 87, 89 of the band-clamp-levers. The cams are secured on a vertical cam-shaft illl rotatable in the slide 8! between the cam-rolls. When the cam-shaft is rotated in one direction, the forward ends of the band-clamp H are moved towards each other by the cams to grip and temporarily retain the heel-end of a shoe. When the cam-shaft is rotated in the opposite direction, the spring 99 connecting the arms 81, 89 of the band-clamplevers opens the clamp. From the cam-shaft ifll extends rearwardly an arm I93 having rotatable in it a vertical pin I05. Through the pin is threaded a horizontal rod l0! having secured on its end toward the right of the ma- I09 by which the rod other is obtained. The band-clamp-slide 8| is adjustably mounted on a dovetailed guide II9 (Figs. 2 and 5) extending forwardly from the vertical slide H1. The guide II9 has formed on its upper surface rack-teeth IZI, which are engaged by the teeth of a pinion I23 on a horizontal shaft I25 rotatable in the slide 8|. The right-hand end of the shaft I25 has secured on it a hand-lever I2? by which the shaft may be rotated to adjust the slide BI and band-clamp forwardly or rearwardly of the machine. The pointed end of a screw I29 threaded through the slide engages a groove in the shaft I25 to prevent it from moving endwise. From the side of the band-clamp-slide SI opposite the lever I21 projects a bolt I3I on which is slidingly mounted a block I33, shaped as shown in Fig. 5, to engage the guide II9. This block is clamped against the guide H9, to hold the band-clamp TI in adjusted position, by a nut or sleeve I35 threaded on the bolt Isl. The sleeve may be rotated by a hand-lever I37, so clamped upon it as to be adjustable into a convenient position for operation.

A second arm I39 of the bell-crank-lever H4 is connected by universal couplings and a rearwardly-extending rod Il to an upwardly-extending arm I43 of a bell-crank-lever I55 fulcrumed on the machine-frame. The other arm IA? of the bell-crank-lever I45 is pivoted to the upper end of one of a pair of toggle-links I59, I 5!. The lower end of the toggle-link I5I is connected to an arm I53 actuated through a link I52 from the treadle I2, as in the previouslymentioned patent. The toggle I49, I5! is normally maintained partly broken by the engagement of stop-lugs I55, I55 on the toggle-links close to their common connection, which lugs are held in normal engagement by a spring I51 connected to the toggle and to the frame of the machine. Normally, the opposite sides of the band-clamp II are separated by the spring 99. When the treadle is depressed to move the workpressing members downwardly, the first part of the movement causes, through the chain of connections between the arm I 53 and the camshaft IUI, the band-clamp-cams 95, 9'I to be rotated to close the sides of the band-clamp II against a shoe placed between them. Thereafter, during continued depression of the treadle, the toggle-links M9, I5I break further, and, while the contact devices on the post I35 are actuated by the treadle to press the work, the spring I5! connected to the toggle yields and holds the cams 95, 91 in the positions they reached when moving the band-clamp into engagement with the shoe. When the treadle is released and as it is fully raised by its spring, the spring I51 returns the toggle-links I59, I5I to their partly broken condition, and thereafter the cams are rotated, and the clamp TI is again opened by the spring 99.

If the machine is being used for attaching a heel or heel-base to a shoe by fastenings inserted from the outside and for spanking a top-lift thereon in successive operating cycles without removing the shoe from the machine, it is desirable, to avoid the opening of the band-clamp II between the successive cycles and the releasing thereby of the shoe, to prevent the treadle from being raised to its highest position. For this purpose, a rod I6! (Fig. 1) joining the treadle-actuated lever I53 to the work-pressing devices, as in the Gouldbourn patent, has secured on it a block I63. A star-wheel I65 having six radial arms is rotatably mounted on a horizontal stud, projecting from the machine-frame below the block I53 and between the rod I6I and the frame of the machine. During each cycle of the machine, the star-wheel is rotated to bring either the end of one of the arms or a gap between the arms beneath the block I63. When one of the arms is beneath the block, and the rod I6I is lowered as the treadle is raised by its spring,

said block engages the arm, and the band-clampis stopped before it reaches its fully raised position and is opened. If a gap between the arms of the star-wheel I65 is below the block I63, the band-clamp will be fully raised and opened when the treadle is released. The star-wheel has secured on it a ratchet-Wheel I61, which is engaged and rotated by a pawl I59 carried by a ratchet-lever I'II fulcrumed on the machineframeand urged towards the ratchet-wheel by a spring I12. The ratchet-lever is connected by a link I13 to the lever 55, hereinbefore referred to as operating the valve 53 in the work-pressing mechanism, so that during each cycle of the machine, the ratchet-wheel is rotated a distance to present to the block I53 either one of the arms on the star-wheel I65 or a gap between the arms. The pawl I59 may, by means of a pin I15 inserted in a hole I'I'I in the lever and engaging said pawl, be held out of engagement with the ratchet-wheel if the machine is used for attaching heels without top-lift-spanking. This allows a gap between the star-wheel-arms to be constantly alined with the block, so that the band clamp Will be fully raised and opened each time the machine is stopped.

The work-pressing devices carried by the plunger I include, as applied to a machine of the outside heel-attaching kind, a member for engaging the crown or top of the cone of a last in the shoe and side members for engaging the upper of the shoe at each side of the heel-end above the band-clamp and between the top and bottom of the last. The side members assist in pressing the shoe against the heel and the heel against the top-lift, if a top-lift is being spanked on to the heel, and prevent lateral tipping of the last and shoe when pressure is applied to the work. This tipping is especially liable to occur if the top of the last is worn or crushed.

The member which engages the crown of the last is a plate I9I (Figs. 2 and 3), which may or may not have a last-pin extending downwardly from it, depending upon the character of the shoe being operated upon. The plate is mounted on the underside of a block I83 for limited movement laterally of the shoe. The block is carried by the lower end of the post I85 and is arranged to tip about an axis lying in the underside of the plate I8I and close to the last-pin, if such is provided, so that the plate I8I and block I83 can tip lengthwise of the shoe. The block has formed on it an arcuate gear-segment I81,

and the post has rotatably mounted in it a shaft M9 on which is a spiral gear I9I meshing with the segment. The shaft may be rotated by a knurled head I93 on its forward end to adjust the angle of the plate I8I, and the shaft'may be locked in adjusted position by a plunger and notches in the shaft (not shown). The post I is pivotally mounted on a horizontal shaft I95 extending laterally of the machine and secured in a slide I9? mounted for fore-and-aft movement in a guideway formed in the underside of a plate I99 on the lower end of a carrier-sleeve 25E surrounding the lower end of the plunger I and arranged to move to a limited extent longi- 75 tudinally thereof. At the inner side of the post I is a rearwardly-extending arm 293 which at its end curves upwardly and forwardly and has formed in it a slot 295 which, when the post is in operating position, first lies horizontally and then curves upwardly at its rear, generally concentric to the shaft I95. A roll 291 is rotatable on the plate I99 in the slot 295. When the post I85 and slide I91 are pulled forward by the operator, the slot travels along the roll 291 until the curved part reaches said roll, when forward movement of the slide ceases and the post may be tipped on its pivot I forward and up, until the upper end of the curved part of the'slot engages the roll. The post is then in a convenient position for the withdrawal of the work and the applying of fresh work. When in its forward and raised position, the post is locked to the slide by a pin 269 in said post, which engages a springplunger 2II in the slide.

' Connected to the slide I91 is a link 2 I3, which at its lower end is joined to the vertical slide II1 which carries the band-clamp-slide 8|, so that the band-clamp 1I moves up and down with the slide I91. The link 2I3 is threaded through pins 2I5, 2I1 rotatable respectively in the slide H1 and in a lever 2I9 fulcrumed on the slide I91 and having a forked forward end engaged by a pin 22I in the post I85. The link 2I3 has right and left screw-threads on its opposite ends, so that by rotating the link the vertical slide I I1, and with it the band-clamp, may be adjusted up or down relatively to the post to cause said bandclamp to be properly positioned to receive the heel-end of a shoe. When the slide I91 is moved forward and the post I85 is swung up, the pin 22I turns the lever 2I9 in ajclockwise direction, as viewed in Fig. 2. The link is therefore actuated to draw up the band-clamp further than it has already been raised as the slide I91 and bandclamp were elevated by the plunger I upon release of the treadle. This provides additional clearance for the presentation of a heel and toplift to the machine.

The members which engage the upper at opposite sides of the heel-end of the shoe consist of two leather-faced blocks 223, 223 (Fig. 3), which are mounted for limited rocking movement lengthwise and heightwise of the shoe on the lower ends of upwardly and outwardly curved bars 225, 225, adjustably held in the lower ends of upwardly-extending clamp- levers 221, 221 situated on opposite sides of the post I85. The clamplevers are fulcrumed on horizontal pivots 229, 229 secured in the outer extremities of a pair of lever-carrying arms 23I, 23!. These arms 23I are fixed at their opposite ends to horizontal studs 233, 233 rotatable in lugs extending laterally from the sleeve 29I of the work-pressing mechanism. The pivots 233, 233 of the lever-carrying arms are on opposite sides of the vertical axis of the plunger I, and the pivot 229 of each clamp-lever 221 at the outer end of its arm is on the opposite side of said axis from the pivot of the arm. The lever-carrying arms 23 I 23I thus cross each other, passing through vertical openings extending laterally through the sleeve 20I and plunger I. The clamp-levers at their upper ends are guided in vertical grooves 235, 235 formed in blocks 231, 231 secured to the machine-frame. The sides of the grooves prevent fore-and-aft springing of the levers, which, at their upper ends, carry camrolls 239, 239 held against the bottoms of the 7 grooves by a spring 2M uniting the levers. The 7 5 upper edge of each of the lever-carrying arms has formed in it a curved recess which is comparatively close to the pivot 233 of the arm and is engaged by a rounded end of an actuating lever 243 pivoted in the opening in the plunger I through which the lever-carrying arms pass. The upper edge of the actuating lever 243, the rounded ends of which are of comparatively short radius from the pivot of the lever, is curved about a horizontal axis extending forwardly and rearwardly of the machine and passing through the vertical axis of the plunger I. The curved edge of the actuating lever seats in a correspondingly curved recess 245 formed in the upper wall of the opening in the plunger through which the lever-carrying arms pass. A pin 241 in the plunger, which passes through a hole in the actuating lever larger than the pin, allows said lever to rock but prevents it from falling if the lever-carrying arms are removed. These arms are normally raised by a spring 249 connected to pins extending downwardly from the arms at their pivots.

The plunger-sleeve 2! has rotatably mounted in it a horizontal pin 25I (Fig. 2) secured by a screw 253. The pin extends from the front of the sleeve toward the rear and at its outer end has a squared portion by which it may be rotated. The inner end of the pin has an eccentric portion 255 which enters a hole 251 in the plunger of greater diameter than the eccentric portion. With the plunger I in its raised position, the portion 255 of the pin engages the lower wall of the hole, and the sleeve 29I and parts carried by it are thereby suspended. When a shoe on the post has been swung downwardly and moved back to position the shoe in the bandclamp II, the blocks 223 are preferably comparatively close to the upper so that the operators fingers cannot accidentally be caught between the shoe and blocks when the latter are actuated.

When the plunger I is depressed by the treadle I2, the plate I8I and the blocks 223 move down together with the shoe until the heel-seat engages a heel supported upon the die-block I 86. Thereafter, during continued downward movement of the plunger I, the plate I8I is arrested, and the actuating lever 243, depressed by the plungersurface 245, swings the lever-carrying arms 23I downwardly about their pivotal axes to move the levers 221 and cause their blocks 223 to engage the shoe. At this time, the lower wall of the hole 251 in the plunger moves away from the eccentric-portion 255 of the pin 25I in the sleeve 20I. By adjustment of the eccentric 255, the initial spacing of the arms 23I from the lever 243 and consequently the extent of clamping movement of the blocks 223 may be varied. Owing to the arcuate movement of the fulcra of the clamp-levers 221 on the lever-carrying arms 23I, and the vertical movement of the upper ends of the clamp-levers by reason of their guidance by the frame-blocks 231, the clamping blocks 223 are moved towards the shoe in a path approximately at right angles to the faces of the upper which they engage. scrape over and mar the upper-material. The pivotal mounting of the actuating lever 243 in the plunger allows the blocks 223 to accommodate themselves to the position of the sides of the heel-end of the shoe laterally of the machine. When the plunger I is moved down to apply pressure to the work, and the plate I8! and blocks 223 are depressed by the actuating lever, the pressure of the blocks against the shoe is equalized by tipping of the actuating lever. Owing to the recesses in the lever-carrying arms 23I Consequently, they do not being comparatively close to the pivots of the arms as compared with the fulcra 229 of the levers 221 at the ends of the arms, the pressure of the plate l8! against the last is greater than the pressure of the blocks 223 against the upper.

If a low shoe rather than a high shoe is being operated upon, a last-pin in the plate I8! may be dispensed with, and the post need not, unless desired, be moved upon the plunger I to introduce a shoe into the machine or to remove it therefrom, since the last will project above the upper. Consequently, the shoe and lastcan be presented to the band-clamp by passing the rear portions under the plate. In this case, the additional raising of the band-clamp by the lever 249 will not occur, its elevation when the treadle is released allowing the introduction and removal of the work.

Having described our invention, what we claim as new and desire to secure by Letters Patent oi the United States is:

1. In a heel-attaching machine, relatively movable work-contacting members, relatively movable actuating members therefor comprising a cylinder and a co-operating piston, one of the actuating members being joined to one of the work-contacting members to effect its movement, and means for moving one of the actuating members relatively to the other actuating member to create pressure in the cylinder during the application of final pressure to the work.

2. In a heel-attaching machine, relatively movable work-contacting members, relatively movable actuating members therefor comprising a cylinder and a co-operating piston, means arranged to move the cylinder to apply preliminary pressure to the work, and means for moving the piston within the cylinder While producing further pressure-movement of the cylinder.

3. In a heel-attaching machine, relatively movable work-contacting members, relatively movable actuating members therefor comprising a cylinder and a co-operating piston, one of the actuating members being joined to one of the work-contacting members to efieot its movement, means for moving the other actuating member to create pressure in the cylinder during the relative movement of said members, and means arranged to control the degree of the thus-generated pressure.

4. In a heel-attaching machine, relativelymovable work-contacting members, relatively movable actuating members therefor comprising a fluid-containing cylinder and a co-operating Diston, one of the actuating members being joined to one of the Work-contacting members to effect its movement, means for moving the other actuating member to create pressure in the fluid in the cylinder during the relative movement of said members and apply such pressure to the work, and means for preventing the escape of the fluid under pressure in the cylinder to retain the work under pressure.

5. In a heel-attaching machine, relatively movable work-contacting members, relatively movable actuating members therefor comprising a cylinder and a co-operating piston, one of the actuating members being movable by the operator, and means made effective under the power of the machine for moving the other actuating member to create pressure in the cylinder during the relative movement of said members.

6. In a heel-attaching machine, relatively movable work-contacting members, relatively movable actuating members therefor comprising a tuating member to create pressure in the fluid in the cylinder during the relative movement of said members and apply such pressure to the work, and means made effective under the power of the machine for preventing escape of the fluid under pressure in the cylinder to retain the Work under pressure.

'7. In a'heel-attaching machine, relatively movable work-contacting members, relatively movabie actuating members therefor comprising a cylinder and a co-operating piston, one of the actuating members being joined to one of the Work-contacting members to effect its movement, and a valve member supported within the cylinder and through a passage in which the piston operates.

8; In a heel-attaching machine, relatively movable work-contacting members, relatively movable actuating members therefor comprising a fluidcontaining cylinder and a co-operating piston,

one of the actuating members being joined to one 7 of the work-contacting members to'effect' its movement, a valve member supported Within the cylinder, said valve member having an opening, and a valve movable under the influence of the fluid to control the flow of said fluid through the opening.

9. In a heel-attaching machine, relatively movable work-contacting members, relatively movable actuating members therefor comprising a fluid-containing cylinder anda oo-operating piston, one of the actuating members being joined to one of the work-contacting members to effect its movement, a valve member supported within the cylinder, said valve member having an opening, a valve movable under the influence of the fluid to control the flow of said fluid through the opening, and means arrangedto vary the resistance of the valve to movement.

10. In a heel-attaching machine, relatively movable work-contacting members, relatively movable actuating members therefor comprising a cylinder and a co-operating piston, one of the actuating members being joined to one of the work-contacting members to effect its movement, and a valve member supported within the cylinder and through which the piston operates, said valve member having an opening controlled by the piston.

11. In a heel-attaching machine, relatively movable work-contacting members, relatively movable actuating members therefor comprising a fluid-containing cylinder and a co-operating piston, one of the actuating members being joined to one of the work-contacting members to effect its movement, a valve member supported within the cylinder, said valve member being provided with an opening, and a valve movable under the power of the machine to control the passage of fluid through the opening.

12. In a heel-attaching machine, relatively movable work-contacting members, relatively movable actuating members therefor comprising a fluid-containing cylinder and a co-operating piston, fine of the actuating members being joined to one of the work-contacting members to effect its movement, a valve member supported within the cylinder, said valve member being provided with a plurality of openings, a valve movable under the influence of the fluid to control the passage of said fluid through one of the openings,

and a valve movable under the power of the machine to control the passage of the fluid through another opening.

13. In a heel-attaching machine, relatively movable Work-contacting members, relatively movable actuating members therefor comprising a cylinder and a co-operating piston, one of the actuating members being joined to one of the work-contacting members to effect its movement,

10 a valve member supported within the cylinder, said valve member being provided with openings, a plurality of valves to control certain of the openings, and another opening controlled by the piston.

14. In a heel-attaching machine, a frame, a

cylinder movable therein and carrying a Workpressing member, a tube fixed to the frame and fitting within the cylinder, a piston movable through the tube, and means for reciprocating the piston.

15. In a heel-attaching machine, a frame, a cylinder movable by the operator therein and carrying a work-pressing member, a tube fixed to the frame and fitting within the cylinder, a

5 piston movable through the tube, and means for reciprocating the piston under the power of the machine.-

16. In a heel-attaching machine, a frame, a cylinder movable therein and carrying a Workpressing member, a tube fitting within the cylinder, there being openings in the wall of the tube to connect upper and lower portions of the cylinder, 2. piston movable through the tube, and means for reciprocating the piston.

17. In a heel-attaching machine, a frame, a

cylinder movable therein and carrying a workpressing member, a tube fitting within the cylinder, a piston movable through the tube, means for reciprocating the piston, and a valve member mounted at the inner extremity of the tube.

18. In a heel-attaching machine, a frame, a cylinder movable therein and carrying a workpressing member, a tube fitting within the cylinder, a piston movable through the tube, means for reciprocating the piston, and a valve member mounted at the inner extremity of the tube and having openings controlled by the piston in its movement.

19. In a heel-attaching machine, a frame, a cylinder movable therein and carrying a workpressing member, a tube fixed to the frame and fitting within the cylinder, a. piston movable through the tube, means for reciprocating the piston, a valve member mounted at the inner extremity of the tube and having a passage opening through its opposite ends, and a valve for controlling the passage.

20. In a heel-attaching machine, a frame, a cylinder movable therein and carrying a workpressing member, a tube fixed to the frame and fitting within the cylinder, a piston movable through the tube, means for reciprocating the piston, a valve member mounted at the inner extremity of the tube and having a passage opening through its opposite ends, a valve for controlling the passage, and means for moving the valve under the power of the machine.

21. In a heel-attaching machine, a frame, a cylinder movable therein and carrying a workpressing member, a tube fixed to the frame and fitting within the cylinder, a piston movable through the tube, means for reciprocating the piston, a valve member mounted at the inner extremity of the tube and having a passage opening through its opposite end, a valve for controlling the passage, a spring within the tube acting to normally close the valve, and means movable upon the tube for varying the force of the spring.

22. In a heel-attaching machine, a frame, a cylinder movable therein and carrying a workpressing member, a tube fixed to the frame and fitting within the cylinder, a tubular piston movable through the tube, means for reciprocating the piston, a valve member mounted at the inner extremity of the tube, a valve-rod movable through the piston, and a valve carried by the rod and co-operating with the valve member.

JOSEPH GOULDBOURN. THOMAS AUBREY KESTELL.

Images