US2347666A

US2347666A - Machine for operating upon shoes

Info

Publication number: US2347666A
Application number: US465975A
Authority: US
Inventors: Alfred S Clark
Original assignee: United Shoe Machinery Corp
Current assignee: United Shoe Machinery Corp
Priority date: 1942-11-18
Filing date: 1942-11-18
Publication date: 1944-05-02
Anticipated expiration: 1961-05-02

Description

May 2, 1944. A. s. CLARK MACHINE FOR OPERATING UPON SHOES 3 Sheets-Sheet 1 Filed NOV. 18, 1942 FEW Q 1 y 1944. A. s. CLARK 2,347,666

MACHINE FOR OPERATING UPON SHOES 3 Sheets-Sheet 2 Filed Nov. 18, 1942 May 2, 1944.

A. s. CLARK MACHINE FOR OPERATING UPON SHOES 3 Shets-Sheet 5 Filed Nov. 18, 1942 75 3 3 Patented May'Z, 1944 UNITED STATES PATENT OFFICE MACHINE FOR OPERATING UPON SHOES Alfred S. Clark, Beverly, Masa, assignor to United Shoe Machinery Corporation, Flemington, N. 1., a'corporation of New Jersey Appllclticn November is, 1942, Serial No. 465,975

' 36 Claims. (01.12-34) a shoe thereonto eause I e velingt'ooltooperate progressively along he hoebot pm 8 which the movements e: 'shoef support-are eiiected bypower-operated means ,ontii'iuously under the controi of theoperaton; I object of theinvention is to p mine in "a tool and the'v'alve is such that no motion is imparted to the valve at this time.

Anotherobject of the invention is to provide in a machine of the above-mentioned type fluid- ,pressure meansfor holding the leveling tool initially in a position higher than it occupies in operating on the shoe'and for moving it auto- ,machine of the above-mentioned,typefluid-pres sure means} tor; operating" t'h fzle iin f toot to apply leveling press'ureto' the gbottoniflor a shoe desired to meetditlerent conditions of work or the tool to vbe lifted out of engagement with the shoe when it is desired to level only selected por- J tlonsof the shoe bottom.

- Asillustrated herein, a fluid-pressure motor constantly acts on the tool to force it against the shoe bottom; and a second fluid-operated Preferably theatre-p essure means f or -'thus Ioperminev th ieve mjsiteetis under; the control of theoperator'softhat heamay'cause'the pressure of the tool on the. shoe bottom to be varied as motor is also connected to the tool in such aman- 1 her that when. full power, is applied by the sec ond motor the tool is lifted out of engagement with the work against the force oi. the first motor. By varying the power output of the second motor, which is readily accomplished by varying the amount of pressure fluid admitted thereto, the effect of the first fluid motor may be only partially overcome so that the pressure of the leveling tool on the work may be varied'as desired or as necessary in operating upon different kinds of work or different portions of the bottom of a shoe. The flow of pressure fluid to the second motor is controlledby a valve operated by a hand lever, so that'upon movement of the valve in one direction'the motor operates to a feature'of the invention for permitting idle movement of the movable element of the -second motor in response to variations in the heightwise position of the tool when full pressureds maticallyinto engagement with the toe end of the shoe bottom at a predetermined time in the movement ofthe shoe support prior to the operation of the tool upon the shoe. By thus holding the tool in this position until the shoe support has been moved rearwardly to carry the shoe beneath the leveling tool, interference is pre-.

vented between the tool and the toe end or the sole and pressure is applied in proper relation to the toe end of the sole. This movement of the leveling tool is eflected-,;in accordance with the illustrated, embodiment of the invention, by

connecting the jack and the valve which controls the second motor referred to above, so that the valve is automatically opened upon movement of the jack into loading-position. The second motor holds the tool in its elevated position until the jack moves rearwardly to carry a shoe beneath the tool, whereupon the valve is closed and the tool is forced downwardly by the first fluid pressure motor in proper relation to the toe end of the sole.

Another object of the invention is to provide in a fluid-pressure-operated system having .a'

fluid-pressure motor, improved means for automaticallyvarying the pressure of the operating fluid so that initially fluid under low pressure is pressure is automatically supplied thereto. This I is accomplished in the illustrated embodiment of the invention 'by providing the pump which supplies the pressure fluid to the motor with a pressure relief valve for determining the maximum pressure of the operating fluid and a restricted by-pass which, when open, diverts a portion of the operating fluid from the motor. When the motor is in an initial rest position, the by-pass is open, but is automatically closed after initial operation of the motor by permitting flow of the pressure fluid thereto. This arrangement minimizes the load on the pump when the machine is at rest while supplying suilicient pressure fluid to initiate operation of the machine after which fluid under high pressure is made available for the operation 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 particularly described by reference to the accompanying drawings and pointed out in the claims. I

In the drawings,

Fig. 1 is a perspective view of a machine in which the invention is embodied;

Fig. 2 is a perspective view partly in section illustrating the mounting for the leveling roll; Fig. 3 is a perspective view illustrating the fluid-pressure mechanism for operatingthe jack;

Fig. 4 is a view in side elevation of the connections between the jack and the motor for elevating the leveling roll when the jack is moved to loading position;

Fig. 5 is a perspective view of the fluid-pressure mechanism for tipping the roll;

Fig. -6 is a perspective view of the fluid-pressure mechanism for lifting the roll; and? t Fig. '7 is a diagrammatic view of the fluid pressure system for operating the machine.

The machine illustrated herein includes a supporting frame comprising vertical side walls l0, an end wall l2 and a horizontal lower supporting wall l4. This latter wall forms the top wall of a reservoir I6 which contains afsupply of press sure fluid by which the machine is operated. Pivoted on a shaft i 8 extending betweenthe side walls H) at their forward portions-is a sleeve carryin a jack 22 to whichswinging move-. I ments are imparted by power-operated means,

under. the control of the operator, as hereinafter described, to carry ashoe supported by the Jack rearwardly and forwardly beneath a leveling roll 24 which is forced down on the shoe bottom to apply leveling pressure progressively to the sole and to which tipping movements may be imparted by separate power-operated means also under the control of the operator to cause the leveling pressure to be applied to the margins of thesole. a

The jack 22 comprises a toe post 28 and a heel post 28 carrying respectively a toe-supporting pad 38 and a spindle 32 arranged toenter the spindle hole in the heel portion K of a last. Whereas the jack illustrated herein is of simplifled construction, it will be understood that any suitable form of jack may be employed, such for example as that illustrated in Letters Patent of the United States No. 2,230,244, granted February 4, 1941, on an application of F. V. Hart et al. Swinging movements are imparted to the Jack by means of an arm 34 fast to the sleeve 20 and depending therefrom. The lower end of this arm is connected by a pivot pin 35 to a rearwardly extending link 38 (Fig. 3),,the rear- I ward and of which is pivoted at 40 to the forwardly extending rod 42 of a piston 44 (Fig. 'l). This piston is slidable in a cylinder 48 which is connected by pipes 48 and 50 to a valve chamber 52 containing a valve member 53 which controls the flow of pressure fluid into the cylinder 46..

The valve chamben52 is-provided with a pair of intake ports 54 and 56 connected to a pipe 58 which is in turn connected to a manifold 60 into which pressure fluid is forced by a" pump 62. The valve member 53 includes a valve element 56 which normally closes both of the intake ports 54 and 56 as shown in Fig. 7 thus preventing the 2,847,666 I flow of pressure fluid to the cylinder 46. Upon movement of the valve member 53 to the left (Fig. '7) the port 56 is uncovered, whereupon the pressure fluid flows through the pipe 50 a into the cylinder 46 rearwardly of the piston 44 to move the piston to the leftand cause rearward swinging movement of the Jack 22. Similarly, upon movement of the valve member 53 to the right, the valve port 54 is uncovered so that 10 the pressure fluid flows through the pipe 48 into the chamber 48 ahead of the piston 44 to move the piston and the jack in the reverse directions. The rearward wall of the cylinder 46 is closed by a plate 68 and the forward end of the i5 cylinder is provided with a cap 10 from which projects a tube through which the piston rod 42 slides. Within the cylinder and 'near its forward end is a wall 2 providing a'compartmen't' between it and the cap ill whichcommunicates by 20 way of a pipe 14 with the fluid reservoir. When the piston is being moved towardthe left by reason of the movement of the-valve member 53 in the same direction, the fluid ahead of the piston escapes through the. pipe 48 and a pipe 2515 which opens into the valvexchamber'an'd is --;uncovered at this time by an'element'n of the valve member to. permit the fluid to flow into a pipe 18 communicating with the reservoir. By the use .of the double wall construction afforded so by theoapfllland the wai iz around the piston rod at the forward end ofi thecyiinder. it is :f-unnecessary to provide packing Tfo'r the piston rod as any fluid which leaksfpast the wall 12 will pass into the reservoir-byway of the pipe 35114. -..The valve memberfflalsoincludesavalve element" whichnormallyfcloses a pipe 82 leading'to the fluid reservoir but which uncovers this pipe upon movement of the va-lvei member to the right topermit discharge 'of the pressure fluid l 40 behind the piston 44 through the pipe 50 when the piston is moved to the right by the pressure fluid entering the cylinder ahead of the piston by way of the port 54.

6 Operation of the valve member53 to control of the jack-Operating motor is controlledby a hand lever 84 (Fig. 1) pivotally connected to the left side wall) of the machine frame-by a. pivot pin 88. The lever 84 is connected by a link 88 to an arm 90 the lower end of which is pivotally connected at'92 to a stem 94 of the valve member 53. The upper end of the arm 90 is supported for limited movement by a slotted bracket 96 secured to the adjacent wall Ill. The

55 arm 90 is also connected for movement with the jack 22 by a link 88 pivoted to an arm I 08 extending upwardly from the jack-supporting sleeve 20.

With the jack at rest, rearward movement of the operating lever 84 will cause the. arm 90 to pivot about its connection to the link 98 and move the valve member 53 forwardly or to the Fluid under pressure now passes through the port and into the cylinder 46 behind the piston 44, thus moving the piston to the left and through the connections heretofore described, swinging the jack rearwardly. As the jack moves rearwardly it acts through the link 98 to swing the arm 90 about its connection with the link 88 connected to the operating lever 84, thus moving the valve member 53 in the reverse direction until the valve member assumes the position shown in Fig. 7 with both ports 54 and 56 closed. Thus the jack is moved'a distance correspond- 75 ing to the extent of movement of the lever 84,

the flow of pressure fluid into the cylinder 46 left as viewed in-Fig.; 7-to uncover the port 58;

. upper surface of the euifvedvportion 1083 511 rearward. movement" o 'tl i operatingi: ,lever b to swing the ja'ck'rearwardly, the pin II rides over the curvedfendiportion, I08'thusexerting a cam -actionflon(the" latch I02 to movejit intadirectly to the reservoir I6 by a pipe I26 and aby-pass valve I28, thereby to reduce the load after which the valve member 63 is returned to its closed position, and the Jack comes to rest. It will be understood that continuous moveshoe out of engagement with the leveling. roll..

Accordingly, provision'is made for normally preventing such movement of ,theiack once the jack has been movedfrom the' loading" position "illustrated in Fig. l into'position to. carry the .toe end of the;jshoe'under the roll. For this purpose a-l'atoh -IM is'p'ivt'ited to the left side walls of the machine on a'fpivot'pin I04 and is urged in a counterclockwisedirection by a spring I06 connected between the latch and the frame of the' machine Therearward' end. of. the latch is upwardly cu'rved flat I08'and cooperates with a. pin III) carried by the arm 90 .to prevent forward" movement of the arm to the position shown in Fig. 1 during the leveling operation. As illustrated, when the jack is in loading 3 position the in H0 is'located' in engagement with to carry'the toe end of the shoe beyond the leveling roll 24; Mechanism is provided for swinging the latch 'ina clockwise direction when itis desired to permit return of the jack to ,loading position. For this purpose the latch I02 is provided; at its lower end. with apin "I I4 ar ranged to, beengagedby theupper end 'of an portion of the frame of the machine. The sleeve H8 is also provided with a forwardly extending treadle I22 by depression of which the arm II6 may be moved forwardly against the force of a spring I24 to impart clockwise swinging movement to the latch I02 to. move its rearward end portion I08 out of the path of the pin IIO, thus permitting the arm 90 to be moved by the operating lever 84 to the forward end of the slot in the bracket 96 as shown in Fig. 1. Rearward movement of the jack during the leveling operation is limited by an arm I26 engageable with an adjustable stop screw I21 carried by a bracket I29. As the jack swings rearwardiy, the arm I swings forwardly and,'by its contact with the stop screw, it prevents the jack from swinging rearwardly beyond a predetermined position.

When the jack is in its loading position the high-pressure side of the pump 62 is connected on the pump. As shown in Fig. 7 the by-pass valve I28 comprises a valve chamber I30 secured to the wall I4 and a valve member I82. When the valve member is in the position shown in Fig. '1 a port I34 is uncovered so that the pressure fluid may flow directly'through the pipe I26 and a pipe I36 into the fluid reservoir. The forward end of the valve member I32 is connected by a link I38 to the lower end of an arm I40 (Fig. 1), the upper end of which is pivoted to the right-hand side wall I0 of the machine frame. The arm I40 is formed with an upwardly curved slot I42 which receives a cam roll I44 on the. rearward end of an arm I46 I inafter.

,secured to the jack-supporting sleeve 20. Upon initial rearward movement of the jack from its loading position the cam roll I44 moves downwardly and acts on the arm I40 to move it forwardly, thereby moving the valve member I32 forwardly or to the left as viewed in Fig. 'l to close the port I34 thus cutting off the by-pass for the pump 62, whereupon the full pressure of the pump is available to move the jack and to operate the leveling roll as described here- The shape of the slot I42 in the arm I40 is such that the valve member I32 remains in closed position throughout the leveling operation and until the jack is returned into loading position. In order to maintain some pressure fin'the system when the jack is in its loading position, a manually adjustable valve I48 is-provided in the pipe I26 to control the fiow through the by-pass when the valve I28 is open. The

' pressure in the system may be readily observed armQ-IIIigerrtending upwardly from a sleeve. H0 7 I 1 journaledon :a shaft I20 supportediin the lower a bracket I60 (Fig. 2) fixed to a shaft I62 sup-' ported for rocking movement in spaced bearings I64 and I66 (Fig. l). nected at its rearward end by a link I66 to a pair of bell-crank levers I10 fulcrumed on a pin I12 carried between the rearward ends of arms I14 (Fig. 2) of a lever I16 secured to the shaft I62 on the opposite side of the bearing I64 from the bracket I60. The lower end of the bell-crank levers I10 carry rolls I18 which are received betweenflanges I of a sleeve I82 slidable on the shaft I62. Upon sliding the sleeve I82 along the shaft I62 motion is transmitted through the bellcrank levers I10 and the link I68 to rock the roll support I54 about" the pin I68, thereby to vary the heightwise position of the leveling roll. Upon movement of the lever I16 to rock the supporting shaft I62 in its bearings I64 and I66 the supportingv frame I 54 is rocked about the axis of the shaft I62 thereby to tilt the leveling roll relatively to the work.

During the leveling operation, the leveling roll is held by fluid pressure against the bottom of the shoe being operated upon. For this purpose a motor I84 (Figs. 1 and '7) comprising a cylinder I86 and a piston I88 is provided. The lower portion of the cylinder is connected by pipes I96 and I92 to the manif0ld60- so that the pressure fluid always acts upon the lower side of the piston I88, tending to move it upwardly within the cylinder. The upper end of the cylinder is connected by a pipe I94 to the fluid reservoir. The piston I88 includes an upwardly extending piston rod I96 which is connected by .a link I98 (Fig. 1)

The support I54 is conside walls I8. The sleeve to a lever 288 pivoted at its forward end on a pin 242 supported by a brace 284 extending between the side walls I8 01' the machine frame. The rearward end of the lever 288 is connected by a link 288 between arms 288 secured to a sleeve 2I8 mounted on a shaft 2I2 supported by the 2H) carries a lever 2 having a forked upper end carrying blocks 2| 6 engaging opposite sides of the sleeve I82 between spaced flanges 2I8 of the sleeve. Upon upward movement of the piston I88 the rearward end of the lever 288 is moved upwardly, causing the sleeve 2I8 to be turned in a clockwise direction (Fig, 1) about the shaft 2I2', thus moving the upper end of the lever 2I4 rearwardly. The

- sleeve I82 is thus moved rearwardly on the shaft I62 and acts through the bell-crank levers I18 and the link I68 to rock the roll support I54 in a" direction to move the roll 24 downwardly against the work.

At the completion of a leveling operation when the jack is moved forwardly to its loading position and while the machine is at rest with the Jack in this position, it is desirable that the roll 24 be held above the work as illustrated in Fig. 1 so that undue pressure will not be exerted upon the toe end of the shoe when the jack is moved rearwardly to carry the shoe beneath the leveling roll. It is may also be desirable to vary the pressure of the roll on the shoe during the leveling operation or to lift the roll entirely out of contact with the shoe to avoid applyingpressure to certain portions thereof. Accordingly, an additional motor 228 (Figs. 1 and 7) is provided for lifting the roll against the force exerted by the motor I84. 222 movable in a cylinder 224 similar in construction to the cylinder 46. Extending outwardly from the rear end of the cylinder-isv a piston rod 226 connected by a pin 228 (Fig. 1) to the lower end of the lever 2 carried by the sleeve 2I8. Upon the introduction of: fluid under The motor 228 comprises a piston" by the pipe 238, the valve chamber 222 and a pipe 242 to the lower end of a surge tank 244 mounted above the motor 228. A. pipe 248 provides communication between the fluid reservoir and the surge tank which is in the form of a closed receptacle so that a predetermined column of pressure fluid may be retained therein. Communication between the forward end of the cylinder 224 and the fluid reservoir by way is cut on by an element 248 of 238 when the valve member is to elevate the leveling roll.

Operation of the valve member 238 is controlled by a. treadle 258 (Fig. 1) secured to a sleeve 252 carried by the shaft by this sleeve is an upwardly extending'arm 254 to which is pivoted the forward end of a link the valve member moved forwardly 256, the rearward end of which is slotted at 252' to receive a pin 253 extending througha vertically extending arm 268 (Fig. 5) thus forming a pin-and-slot connection with the arm. The lower end of the arm 268 is pivoted to a valve stem 262 of the valve member 238 and the upper end oirthe arm is connected by a link 263 to the lever I4 (Fig. 1) bywh'ich the vertical movement of the leveling roll is effected.

The treadle 258 is maintained in raised position, as shown in Fig. 1 by a spring 264 connected between the arm 254 and a pin secured to the wall I4 of the machine frame. An adjustable stop, comprising a screw 2'66 threaded through a bracket 268 carried by the arm 254, by its'engagement with the adjacent portion of the machine frame limits the upper position of the treadle. Upon depressing the treadle 258- the arm 268 connected to the valve stem 282 swings about its connection 'to the'iink 263, after the pin 259 engagesthe rearward end of the slot in "the link 256, tovmove the-valve member 238 inthev direction of; the arrow in Fig. 7, thus clospressure into the forward end or the cylinder 224 the en'ect of the motor I84.

For controlling the operation of the piston 2.22

a valve member 238 is provided slidable within a valve chamber 232. The valve chamber is connected by a pipe 234 to the manifold 68 and flow of pressure fluid through this pipe into the forward end of the cylinder 224 is controlled by an element 236 of the valve 238 which normally closes the valve chamber 232 from the pipe 234.

Upon movement of the valve member 238 forwardly of the machine or to the left as viewed in Fig. 7, pressure fluid flows through the pipe 234 and a pipe 238 connecting the valve chamber 232 and the cylinder 224' to move the piston 222 rearwardly, thereby elevating the roll 24. A pipe 248 provides communication betweenthe rearward end of the cylinder 224 and the fluid reservoir. When the valve member 238 is in the position shown in Fig. 7 the piston 222 is free to move within the cylinder in response to variations in the height of the leveling roll during the leveling operation as diflerent portions of the shoe bottom are traversed. For thus permitting this freedom of movement of the piston 222 at this time the forward end of the cylinder 224 is connected necting thedever m and-the arm'f258'. forward- 13). This forward movement ofthe link '263swings on. However the valve the arm 288 "about the pin 258 to move the valve member 238 the leftuntil the pipe 234 is closed element 248 does not move far enough at this-time to uncover-the pipe 242," so that 'thefpressure fluid becomes trapped within the cylinder 224 behind the piston. During this movement oi. the arm 268 about the pin 258, the pin is held in the rearward end of the slot 258 by a spring 218 (Figs. 5 and 6) secured between the arm and the pipe 234. It will thus be seen that a follow-up mechanism is provided so that the piston 222 will move a distance corresponding to the amount of depression of the treadle 258. Accordingly, a slight movement of the valve member 238 may not be suflicient to lift the roll 24 entirely out of engagement with the shoe but will partially overcome the force which is exerted by the motor I84 to force the roll against the shoe bottom thereby reducing the pressure of the roll on the work. Upon release of the treadle 258 the arm 268 is returned to its original position by the spring 218. The valve element 248 now uncovers the pipe 242 a1- lowing the fluid behind the piston to flow therethrough to dissipate the pressure thereon, and

der full pressure by the motor I84.

of the surge tank I28. Also carried erated by the which cooperates with'a cam leveling operation.

In order to move the roll upwardly at the completion of the leveling operation, mechanism op- Jack-operating-motor 46 and illustrated in Figs. 3, 4 and is provided. The pin 253 connecting the link 256 and the arm 260 extends outwardly from the arm and is connected by a short link 280 to a rod 282 which is supported for sliding movement by bosses 283 car ried by a bell-crank lever 233 pivoted at 288 to the machine frame. Pivotedto the upper end of the bell-crank lever 236 is a pawl 290 which locks the rod 2-82 against rearward movement relatively to the lever when the pawl is in 0perative position. The position of the pawl relatively .to the bell-crank lever is controlled by an arm 292 movable with thepawl and held by a spring 234 against an adjustablestop screw 298 r carried by a fixed bracket 238. During the leveling operation, the bell-crank lever 286 is held in a position disposed somewhat clockwise of that shownin Fig. 4, in engagement with the upper end 0! the bracket 233, by a spring 303 connected between the bell-crank lever and a pin 302 secured to the cylinder the leveling operation, the arm 232 in cooperation with the stop screw 236 holds the pawl 290 out of operativerelationship with the rod 282 so that this rod is free to slide relatively to the bell-crank lever in response to movements imparted to the arm 260. when the heightwise position of the leveling roll leveling operation because of differences in height of various portions of the shoe bottom.

Carried by the forward end of the previously mentioned piston rod 42 is a bracket 304 having a rearwardly extending arm carrying a roll 306 slot 308 formed in the lower arm of the bell-crank lever 286 to cause movement, of the bell-crank lever in a counterclockwise direction-(Fig. 4) upon rearward movementof the roll 366 into the position shown. This movement takes place as the jack is moved by thepistonv 44 and the piston rod 42 into loading position at the completion of the This movementof the bellcrank" lever moves-the upper end of the arm. 292 away-from the screwj236 and permits movement of the armp-232 by the spring 234 relatively to the lever tomove the pawl 230 into gripping relationship with the rod 232. Upon further movement ofthe bell-crank lever by the jack, the rod 232 is moved forwardly therewith, causing the arm 260 to turn in a clockwise direction (Figs. 3.and 5) about its connection to the link 263 to move the valve member .230iorwardly and to open the motor 220 to the fluid under pressure, thus causing the roll 24 to be elevated. Upon reverse movement of the jack to carr the shoe under the leveling roll, the roll. 306 (Fig. 4) moves out of the slot 308 and the bell-crank lever 23-8 is moved in a clockwise direction by the spring 300 to free'the rod 282 from the pawl 29!), whereupon the spring 2'") (Figs. 3 and 6) returns the valve member 230 to the position shown in Fig. 7 and. the leveling roll is forced downwardly I by the motor I34 into engage with the work effected y generally simflar 'j Tipping 'of the leveling roll is fluid-pressure motor struction to 'the jack-operatingniotor and, including va piston 320' .(FigJ 'l-l" slidable in a vertically; disposed cylinder 322.'{Projecting upwardly Irom'th'e cylinder is 'a'pis'ton rod 324 corinected by a link'326,(Fig.'l) to the lever I16 secured to the shaft I62 by which the leveling roll is supported. Flow of pressure fluid into 46. Accordingly, durin the cylinder 322, through

pipes

328 and 330 connected respectively to the lower and upper'portions of the cylinder, is controlled by a valve member 332 similar to the valve member 53 of Fig. 7. Upon upward movement of the valve member, fluid under pressure flows from the maniiold through pipes I32, 334, 336 and 328 into the lower end of the cylinder 322 to move the piston upwardly and tip the leveling roll in a counterclockwise direction (Fig. 1). Downward movement of the valve member 332 causes the pressure fluid to'fiow through a pipe 338 and the pipe 330 into the upper portion of the cylinder, causing the leveling roll to tip in the opposite direction,

The,valve member 332 is,.operated by a hand lever 340 (Fig. 1) which is pivoted at 34I to the machine frame and is connected-by a link 342 to the upper end of a bell-crank lever 344 pivoted at 346 to the frame of the machine. The lower arm of the bell-crank lever 344 is connected by a link 343.to one end of a lever 360, theopposite end of which is pivoted to the lower end-ot an arm 352 of; the lever I16. The valve member}; 332 includes a valve stem 368 pivoted 'to m n-.5

termediate portion of the lever 362. ppm-rear tion (Fig. 1) about its connectionto the arm 352 of the lever "6 to move" the valve stern 353 v upwardly, thus introducing fluid under pressure j of the cylinder- 322'. This into the lower end causes upward movement of the piston 320, tipping the. leveling roll in a counterclockwise direction (Fig. 1) and causing counterclockwise movement of the arm 35201 the lever .I'l6' to swing the lever 356 about its connection to-ithe' link 348, thereby moving the valve member 332 back toward its original position Accordingly, the .degree of tipping movement of the roll will depend upon the amount of displacement-of the valve member 332' which is directlyproportional to the extent of movement of the operating lever 340. It will be understood that forward movement of the operating lever 34!] causes movement of the valve member 332 downwardly so that the leveling roll is tipped in the opposite direction. I

1 Provision is made for insuring that the leveling roll is in a horizontal position when the Jack is in its loading position so that at .the beginning of the leveling operation the leveling roll will not exert undesirable pressure along either edge of the sole at the toe portion. For this purpose the ,forward end of the arm I46, movable with the jack, is provided with an adjustable screw ,3" engageable with an arm 312 extending rearwardly from the operating lever 340 to cause this lever to move rearwardly to the position'shown in the event that the lever is in its forward position at the conclusion of the leveling operation. Should the operating lever be in a rearward position at the end of the leveling operation, the forward end of the arm I46 will engage the lever when the jack is moved to loading position, thereby moving the operating lever forwardly into the position shown. Accordingly, irrespective of the position in which the operator leaves the lever 34!! at the end of the leveling operation, it will be moved into the position shown in Fig. 1 by the jack when the jack moves into its loading position thereby to move the leveling roll into horizontal position. i

In the operationof the machine, a shoe is placed on the Jack .22, the parts being in the positions shown in Fig. 1 when the machine is at'rest. The operating lever 84 is then moved rearwardly, swinging the downwardly extending arm 90 towhich it is connected in a direction to move the valve stem 84 forwardly and admitting pressure into the-cylinder 48 rearwardly or the piston-44; which thus moves the Jack rearwardly to carry the shoe under the leveling roll 24; At the beginning of thismovement ofthe Jack, the 'roll SOS-(Fig.4) moves' out of the cam slot 308 in the "lever 2'86 and thespring- 300moves this lever in a direction to freethe rod 282 from the action of the pawl 290, whereupon the-spring 210 (Fig. 5) moves the valve stem 262 rearwardly to shut ofi the'fiow of pressure fluid from the pump to the cyli-nder 224 (Fig. 7-), and the motor I84. movesf'the leveling roll into engageslot Ifl-of'the arm H8 at the beginning of the rearwardmovement of the jack, thus moving the arm I40 in a clockwise-direction and closing the by-pass valve I 28so that the full capacity of the-pump is available for the leveling opi'eration.

The jack is now moved 'forwardly'and rearwardly bycorrespondlng movements of the operating lever 84 and the roll is tipped as desired by forward and rearward movements of the operating lever 340. If it is desired atI-any time to reduce the 'pres'sure'of the leveling roll-24,' the treadle 250 may be depressed to admit fluid behind the piston- 222 which'is moved an amount corresponding to the amount that the treadle is depressed to' reduce the effectiveness of the motor I84 accordingly. If the treadle -25Il is'depressed sufllciently the'leveling roll may be lifted out of engagement with the shoe'bottom. This action maybe desired if the type ofshoe being leveled requires the'leveling pressure to be withdrawn at certain portions of the shoe bottom. I At the completion of the leveling operation, the operating lever 84 is moved forwardly and the treadle I22 is depressed, thus releasing the latch I02 and permitting the forward movement of the lever 84 far enough to move the Jack into loading position. During this movement of the lack, the roll 306 enters the cam slot in the lever 286 (Fig. 4) to move this lever in a counterclockleveling tool in directions lengthwise or a shoe 3. In a leveling machine, a shoe support, a lev- .eling tool, means for effecting relativemovement of the shoe support and the leveling tool in directions lengthwise of a shoe on the support to cause the tool to operate progressively along the shoe bottom, fluid-pressure-operated means for forcing said tool against the shoe bottom, and other fluid-pressure-operated means under the control 01' the operator for varying the'pressure of the tool on the shoe bottom-during the leveling operation. T w I 4. In a leveling machine, a shoe support, a leveling tool, power-operated means fore-effecting on the support to cause the tooltooperate-progressively along the shoe bottom, fiuid-pressureoperated means acting normally to rorce said levelingtool downwardly into engagement, with.

the shoe bottom, and means under the control of the operator for raising saidtool against the action of said fluidpressure operated means.

5. In a leveling machine, a shoe support, a lev- 1 eling tool, power-operated means for effecting relative movement of the shoe support and the leveling tooliin' 'directions lengthwise of a shoe on the support-to causethe tool to operate progressiv'ely along the shoe bottom, fluid-pressurewise direction which causes operation of the.

motor 220 to lift the leveling roll.- At the same time the lever 340 is moved into its neutral position and the by-pass valve I28 is opened to re-' duce the load on the pump 62 while maintaining suificient pressure in the system to hold the leveling roll in its elevated position in readiness for the next leveling operation.

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 leveling machine, a shoe support, a leveling tool, means for effecting relative movement of the shoe support and the leveling tool in directions lengthwise of a shoe on the support to cause the tool to operate progressively along the shoe bottom, and fiuid-pressure-operated means acting on said tool to force it against the shoe. bottom.

operated means acting normally to force said leveling tool downwardly into-. engagement with the shoe bottom, means under the control of the operator for raising said tool againstthe action of said .fiuid pressure-operated 3 means, and operator-controlled means ror varying the force with which the tool-is :pressedagainst. theibottom of theshoe. a 3

6. In a. leveling machine, a shoe support, a leveling tool, power-operated an ,io sw t.

ing relative movement ,orQthe'sho'e support and the leveling Ttool inrdlmdtions lengthwise of av shoe on the support to-cause the tool to operate progressively along theshoe bottom, fluid-pressure-operated means: acting on said tool to force it against the shoe bottom, and operator-controlled means acting on said tool in opposition to said fluid-pressure means efl'ective to reduce the pressure of the tool on the shoe bottom or to move the tool out of engagement with the shoe bottom.

7. In a. leveling machine, a shoe support, a leveling tool, power-operated means for effecting relative movement'oi the shoe support and the leveling tool in directions lengthwise oi a shoe on the support to cause the tool to operate progressively along the shoe bottom, fluid-pressure-operated means acting on said tool to force it against the shoe bott0m,-and operator-controlled means for varying the effectiveness of said fluid-pressure-operated means during the leveling operation.

8. In a power-operated machine, a support movable to present work in position to be oper- 2. In a leveling machine, a shoe support, a levated upon, a tool for thereafter operating upon the work, mechanism arranged to be operated by pressure of fluid against it for effecting such movement of said support, a pump for supplying statements:

fluid under pressure to said mechanism, means for normally diverting a portion or the operating fluid from said mechanism thereby to reduce the pressure of the fluid supplied to said mechanlsm to a predetermined low value, and means for, rendering said last-named means inoperative at a predetermined time in the movement of the support prior to engagement of the tool with the work.

9. In a power-operated machine, a support movable to present work in position to be operated 'upon, a tool for thereafter operating upon the work, mechanism arranged to be ;.operated by pressure of fluid against it for eifectingsuch movement of said support, a pump for -supply-.

ing fluid under pressure to said' mechanism,

means formoving said leveling tool downwardly into engagement with the bottom or a shoe on the support in response to suchrelative movement of the shoe support and the leveling tool.

13. In a leveling machine, a shoe support, a leveling tool, means for moving said shoe support in directions lengthwise oi. a shoe thereon to cause said leveling tool to operate progressively along the shoe bottom, and fluid-pressure means for holding said leveling tool initially in a posi- 7 tion higher than it occupies in operating upon means acting normally to cause a recirculation of a portion of the operating fluid through said pump to cause the pressure of the fluid supplied to said mechanism to be reduced to a predetermined low value,and means for closing said recirculating means at a predetermined time in the relative movement of thesup'port and toolprior" tdthe' engagement ofthe tool with the work. I

10; In a powerepented machine, a support movable to presentWorkE-ln' position to, be 'opere yatedupon fil s ine a tool-for thereaftei'operating upon a restricted by-pa'ss connectin thefhi'gh-pre'ssure and low-pressure I sides'of *sai limp, a valve for controllingiithe flow .ofiioperatihgf iluicl through said b eassess arranged when open to cause the'pressurej of the operating fluid to be reduced to a 'predeterrnlnedlow value, means for controlling the "flow of fluid from saidpump, to said mechanism, means operativein 'response .to fthe initial operation-of saftl"mechanismby the fluid" under low pressure "for closing said valve to cause the pressure 'ofthe operating fluid to-be increased,

a meehansm' the shoe and for moving it automatically into eneasement. with the toe end of the shoe bottom at a predetermined time in the movement of said shoe support prior to the operation of said tool uponthe shoe. V

14. In a leveling machine, a shoe support, a leveling tool, means'for moving said shoe support in directions lengthwise of a shoe on the support to cause the tool to operate progressively'along the shoe bottom, fluid-pressureeoperated means acting on said tool to force it against the shoe bottom, and means'ror lifting the tool out or enga'gement'with the shoe bottom in response to nidvemgint-ofthesho' support to carry-the shoe out lorengagem'ent' with the leveling tool.

..15.-Ini apleveling machinega shoe support, a

leveling t l, "power-operated means for moving oe supportjin directions lengthwise or a 6g essivelyaio'ng tneshoe"-bottom-, fluid-pressure-'operatedmeans acting on said tool to force it against the shoe bottom, meansfo'r lifting the tool out of 'engagerrient'with the shoe bottom in and apressure-rehef 'valve for determining the maximum pressureo'fi' the operating fluid. 1

Til. In'wa-powergoperated machine, a support r'efs ent' worktin position to beeperecha '"m arran ed to be operated-by (it effecting? such plying fluid 1unuer pressure-to "said" mechanism, a restricted by pass connecting the high-pres: sure and low-pressure sides or said pump, a valve for controlling the flow of fluid through said bypass and arranged when open to cause the pres sure of the operating fluid to be reduced to a predetermined value, means for controlling the flow of fluid through said by-pass when said valve is open to regulate the minimum pressure of the operating fluid, means for controlling the flow of fluid from said pump to said mechanism, means operative in response to the initial operation of said mechanism by the fluid under low pressure for closing said valve to cause the pressure of the operating fluid to be increased, and a pressure-relief valve for determining the maximum pressure of the operating fluid.

12. In a leveling machine-"a? shoe support, a leveling tool, means for effecting relative move ment of the shoe support and the leveling tool in directions lengthwise of a shoe on the support to cause the tool to operate progressively along the shoe"bottom', nreans for-holding said leveling tool-1nan elevated'positiun at the beginning of a leveling operation', ---fli-1 i'd-r'iressure-operated "thereafter operating upon "thefworit'support, a pump 'for' supeoperation of the-machine;

response to 'move'ment'of the shoe support to carry the-shoe out of. engagement with the levellrig tool, and operatoricontrolled'means for actw ating said lifting means atany time during the 16. In a leveling machine; a shoe support, a

tojcau se the tool to operate progressively along the shoe bottom, and fluid-pressure-operated means arranged automatically-to move the levelingtool into engagement with the shoe bottom inresponse to rearward. movement of the shoe support from anjinitial position to carry the toe end'ofthe shoe-into a predetermined.relationship withtheleveling'tjool. I

.17. In a leveling machine, a shoe support, a leveling tool, power-operating means for moving said shoe support in directions lengthwise of a shoe on the support to cause the-tool to operate progressively along the shoe bottom, and fluidpressure-operated means controlled by said power-operated means to move the leveling tool into engagement with the shoe bottom in response to rearward movement of the'shoe support from an initial positionto carry the toe end of the shoe into a predetermined position with relation to the leveling tool.

18. In a leveling machine, a shoe support, a leveling tool, means for moving said shoe support in directions lengthwise of a shoe on the support to cause the tool to operate progressively along the shoe bottom, fluid-pressure-operated means arranged automatically to move the leveling tool into engagement with the shoe bottom in response to rearward movement of the shoe support from an initial position to carry the toe end of the shoe into a predetermined relationship with the shoe support, and operator-controlled means for varying the force with which the tool is pressed ii fthe support to cause thetool-" -to'operate against the bottom of the shoe during the leveling operation.

19. In a leveling machine, a shoe support, a leveling tool, fluidpressure-operated means for moving said shoe support in directions lengthwise of a shoe on the support to cause the tool to operate progressively along the shoe bottom, and second fluid-pressure-operatecl means controlled by said first-named fiuid-pressure-operated means to move the leveling tool into engagement with the shoe bottom in response to rearward movement oi the shoe support from an initial position to carry the toe end of the shoe into a predetermined position relatively to the leveling tool.

20. In a leveling machine, a shoe support, a

levelin tool, fluid-pressure-operated means for moving said shoe support in directions lengthwise of a shoe onthe support-to cause the tool to operate progressively along the shoe bottom, second fluid-pressure-operated means controlled by said first-named fluid-pressure-operated means to move the leveling tool into engagement with the shoe bottom in response to rearward movement of the shoe support iroma rearward position to carry the toe end of the shoe into a predetermined ator-controlled means for varying the force with position relatively to the leveling tool, and operwhich the tool is pressed against the bottom ioff' h $1109 during the leveling operation.

21. In a leveling machine, a .shOeSHDDOI -t, a

leveling tool, power-operated means for moving said shoe support in directions lengthwise lofa shoe on the support to cause the tool :to-operate progressively along the shoe bottom, fluid-pres sure-operated means acting on said ,tool toJforcef it against the shoe bottom, and-fluidspressure -fl operated means arranged automatically to liftt'he' tool out of engagement withthe shoe bottom-(in the shoe bottom, and means for increasing the pressure of the operating fluid as the shoesupport is thus moved.

23. In a leveling machine, a leveling tool, a shoe support movable toward said leveling tool to carry a shoe mounted thereon into position to be openated upon by said tool, said tool being movable to apply pressure to the shoe, mechanism arranged to be operated by pressure of fluid against it for effecting such movements of the shoe support and the tool, and means for increasing the pressure of the operating fluid in response to the movement of the support to-carry the shoe into position to be operated upon.

24. In a leveling machine, a leveling tool, a shoe support movable toward said leveling tool to carry a shoe mounted thereon into position to be operated upon by said'tool, said tool beingmovable to apply pressure to the shoe, mechanism arranged to be operated by pressure of fluid against it for effecting such movement of the shoe support and the tool, means for increasing the pressure of the operating fluid in response to the movement of the support to carry the shoe into position to be operaaeaeee the toe end oi the shoe into a predetermined position relatively to the leveling tool.

25. In a leveling machine, a leveling tool, a shoe support movable toward said leveling tool to carry a shoe mounted thereon into position to be operated upon by said tool,.said tool being movable to apply pressure to the shoe, mechanism arranged to be operated by pressure of fluid against it for effecting such movements of the shoe support and the tool, means for increasing the pressure of the operating fluid in response to the movement of the support to carry the shoe into position to be operated upon, and operator-controlled means for varying the force with which the. tool is pressed against the bottom of the shoe;

26. In a leveling machine, a shoe support mow able to carry a shoe mounted thereon into position to be operated upon. a leveling tool for thereafter operating upon the shoe, mechanism arranged to pressure and low-pressuresides of said pump and arranged when open to cause the pressure of the operating fluid to be reduced-atoa'pi'edetermined minimum value, means ',--controlling the iflow of v 01 pressure fluid fromsaidpump'toisaid'mechanism, f l

and meansoperated inresponse to the initial movement of said shoe Supporfil'by' said Imeoha nism under-low pressure for closing-said by-pass toeause an increase in v the 1zu'essureoi'tlife'operate lng' fiuidavailable rorjoperating said mechanism; "21.1 a develingfmachine, a ,.-shoe support movable" to; carry a shoe mounted "thereon into position tobe 'operated'upoma leveling tool for thereafter operating'uponthe shoe, mechanism arranged to be operated by pressure of fluid,

against it for eiIecting such movement of the support, a pump for supplying fluid under pressure to said mechanism, a pressure relief valve for determining the maximum pressure of the operating fluid supplied by saidpump, means normally by-passing' a portion of; theypressure fluid from the high to'thelow-pr'essure side of said pump to cause operatingfluid-tobe supplied to said mechanism initially at a value lower than that determined by saidrelief valve, and means for automatically rendering said last-named means inoperative-to by-pass said-fluid at a predetermined time in the movement of the shoe support to carry the shoe into position .to be op-" erated upon to cause the pressure of the operating fluid to be increased- 28. In a leveling machine, a shoe support movable to carry a shoe thereon into position to be operated upon, a leveling tool for thereafter operating upon the shoe, mechanism arranged to be operated by pressure of fluid against it for effecting such movement of the shoe support, a pump for supplying fluid under pressure to said mechanism, a restricted by-pass connecting the high-pressure and low-pressure sides of said pump, a valve controlling the flow through said by-pass and arranged when open to cause the pressure of the operating fluid to be reduced to a predetermined value, means for controlling the flow through said by-pass when said valve is open to regulate the minimum pressure of the operating fluid, means for controlling the flow of fluid from said pump to. said mechanism, means operative in response to'jithe initial operation of said mechanism by the fluid under low pressure to said second motor.

move said shoe support for closing said valve to cause the pressureof the operating fluid to be increased, and a pressure-relief valve for de-.

leveling tool in directions lengthwise of a shoe on the support to cause the tool to operate progressively along the vshoe bottom, a motor con-' I nected to said leveling tool for forcing it into engagement with the shoe bottom, a second motor connected to said leveling tool for moving the tool out of engagement with the shoe bottom, and means for varying the relative power output of said motors to vary the pressure of the tool on the shoe bottom.

30. In a leveling machine, a shoe support, a

levelingtool, power-operated means for moving said shoe support in'directions' lengthwise of a shoe on the support to cause thetool to operate progressively along the shoe bottom, a motor con nected to said leveling tool for forcing it into engagement with the shoe bottom, a second motor connected to the leveling tool for moving it out of engagement with the shoe bottom against theactio'n of the first-named motor, means un-;

der the control of the operator for varyin'g the efiectiveness of thesecond motor during-the levelcarry the shoeout of engagement with the levcling tool.

31. In a leveling machine, a shoe support, a

leveling tool, power' op'ei'atedmeans for effecting pressure'fluid thereto, to move the tool out of engagement withthe shoe bottom, operator-controlled means for admitting selected; amounts of pressure fluid to the second motor, and means for automatically admitting fluid pressure to said second motor in response to movement of the shoe support to carry the-shoe out of engagement with theleveling tool.

f 34;In a leveling machine, a {shoe support, ai

leveling tool, 'powe'r-operated means for moving said shoe support in directions lengthwise of .a shoeon the support to cause the tool to operate "progressively along the shoe bottom, a first fluidpressure-operated motor acting constantly on sald tool to force it into engagement with the shoe botto m,,- a second fluid-pressure-operated motor connected to said tool'and arranged to raise it against the action of said first fluidpressure-operated motor in response to the admission ofpressure fluid into the second motor, a valve for controlling-the admission or pressure fluid to saidsecond motor, a control lever, a link connecting said control lever and said valve for opening the 'valve to admit fiuid pressure 0! varying amounts tosaid second motor, and means connecting the leveling tool and said link for-causing closing-movement of the valve as the roll is elevated so that the-extent of elevation of the roll is proportional to the displacement'of the control lever, the connection between the link and the valve including a lost-motion connection so that no movement is imparted to the valve in response'to 'heightwise movement of the tool as portionsof the shoe bottom at vary- 5 ing heights from the shoe support are traversed relative movement ,of'the shoe supportand the r leveling tool in directions lengthwise" of a shoe on the support to cause the tool to operateprogressively along the shoe bottom, a fluid-pres sure-operated motor connected to said' leveling tool and acting to force the tool into engage-"- ment with the shoe bottom, a second fluid-pressure-operated motor connected to the levelin tool andacting tomove it away'from the shoe bottom, and means for varying the relative amounts of pressure fluid admitted to said-mo; tors to vary-the pressure of the tool on the shoe bottom.

can a leveling machine, a shoe supportga leveling tool, power-operated means forefiect g relative movement'of the shoe support and he" leveling'tool in directions lengthwise 'of'a shoe on the support to cause the tool to'operate pmby the leveling-tool; a l

'35. In a leveling machine a shoe support, a levelingwtool, power-operated means for movingsaidshoe support in directions lengthwiseota shoe on thesupportto cause the tool to operate progressively along the shoe bottom,a first fluidpressure-operated-motor actingconstantly: on

said tool to force it into, engagement-with; the shoe bottom, .a I second -fluid-pressure-operated motoroonnected-to said tool andarranged to raise it against the action of said first fluid-pres. suresoperated motor in response tothe admission of pressure fluid into the second motor, a valve for controlling the admission ot pressure fluid to said second motor, a control lever. a link connecting. said control lever and said, valve for. opening it to admit fluid pressure of varying amounts to, said second motor, means connectingthe leveling tool and said link for causing closing gressively along the shoebottomya fluid-pres sure-operated motor connected *to the leveling tool and acting normally 'to' force the tool into engagement with the shoebottom,'a second'fluids 'i b-l pie d motor connected to the leveland arranged p n the admissionot pressure fluidj thereto-to movethe toolout of engagement with the shoe bottom, and means-for controlling the admission of pressure fluid 'to:

33. In a leve leveling tool, power-operated means for moving said shoe support in directions lengthwise oi a shoe on the support to cause the tool to: operate progressively along the shoe bottom, a fiuid presling ma'chinaa shoe support, a

sure-operated motor connected to said leveling tool'and acting normally to force the'tool'int'o engagement with theshoe bottom, a second fluidpressure-operated motor connected to said lev eling tool and arrangedpupon theadmission-of movement or the-valve as theroll isvelevated so that the ,extentofelevation Qrme'mu is pro portional tothe displacement of the control lever, the connection between the link and the, valve including a lost-motion connection so, that no. movementis imparted to thevalve in response to heightwise movement of the tool as portions of the shoe bottom at varying heights from, the shoe support are traversed by the leveling tool, and means enabling free motion of thesecond fluid-pressure-operated motor in response to such motion -of the tool when the. valve is in closedposition.

-36. In a leveling machinaa shoe support, a leveling tool, power-operated means for moving said shoe support inidirections lengthwise of a shoe on the support to cause the tool to operate progressively along the shoe bottom, a first fluidpressure-operated motor acting constantly on said tool to-force it into engagement with the shoe bottom, a second fluid-pressure--operated motor connected to said tool and arranged to raise it against the action of said first fluid-- pressure-operated motor in response to the admission of pressure fluid into the second motor, a valve for controlling theadmission of pressure fluid to said second'motor, a control lever, a link connecting said control lever and said valve for opening it to admit fluid pressure of varying amounts to said second motor, means connecting the leveling tool and said link for causing closing movement 0 the valve as the roll is elevated so that the extent of elevation