US2097576A

US2097576A - Machine for operating on shoes

Info

Publication number: US2097576A
Application number: US86838A
Authority: US
Inventors: Roberts William Tho Buckingham
Original assignee: United Shoe Machinery Corp
Current assignee: United Shoe Machinery Corp
Priority date: 1935-08-13
Filing date: 1936-06-23
Publication date: 1937-11-02
Anticipated expiration: 1954-11-02

Description

Nov. 2, 1937. w. 1-. B. ROBERTS MACHINE FOR OPERATING 0N SHOES Filed June 25, 1936 3 Sheets-Sheet 1 Nov. 2, 1937. w. T. B. ROBERTS MACHINE FOR OPERATING ON SHOES 3 Sheets-Sheet 2 Filed June 23, 1936 1937- w. 'r. B. RQBERTS MACHINE FOR OPERATING ON SHOES 6 Sheets-Sheet 3 v Filed June 23, 1936 77AM A 4;.

Patented Nov. 2, 1937 UNITED STATES- MACHINE FOR OPERATING ON SHOES William ThomasBuckingham Roberts, Leicester, England, assignor to United Shoe Machinery Corporation, Paterson, N.

New Jersey Application June 23, 1936, Serial J., a corporation of In Great Britain August 13, 1935 29 Claims.

This invention relates to machines for operating on shoes and more particularly to means for positioning or holding shoes in such machines, the term shoes being generally used herein to include what are known as boots. The invention is herein illustrated as applied to a toelasting machine provided with novel toe-lasting means claimed in a copending application of Frank B. Keall, Serial No. 86,828, filed on June 23, 1936, but it is to be understood that it is not limited to machines of that particular character or to machines for lasting shoes.

In United States Letters Patent No. 1,993,117, granted on March 5, .1935 upon an application of mine, there is disclosed, in a toe-lasting machine, a shoe support or jack having a shoe-positioning member for engaging the bottom of the forepart of a shoe, a toe rest and a heel rest movable respectively heightwise and lengthwise of the shoe to clamp and hold the shoe, and a member movable by the operator to force the toe and heel rests against the shoe, together with means for moving the shoe support and the shoe 2. predetermined distance toward the toe-lasting means by the movement of that member. In one aspect of the present invention an object is to provide certain improvements in the earlier construction such as to adapt it still better for use in operating on shoes of diilerent sizes and on long-legged boots, and such also as to facilitate its use by the operator. For better accommodation to shoes of different sizes the construction herein shown includes provision for yield in the mechanism movable by the operator to force the toe and heel rests against each shoe, together with means whereby these rests are forced positively against the shoe near the end of the shoe-clamping operation, whatever the size of the shoe. Quickly operable means also is provided for effecting an adjustment of the mechanism to operate on shoes which differ greatly in length.

To facilitate movements of the shoe support toward and from the means which operates on the toe end of the shoe, the support in the construction herein shown is mounted on parallel links, the arrangement being such that the weight of the support tends to swing the links in a direction to carry the shoe away from the operating means. Springs also are provided to assist in initiating the movements of the support in both directions. Still further facility in the use of the shoe support is afforded by a novel constructicn and arrangement of means for efiecting the clamping of the shoe and the movement of the support toward the operating means.

The above and other features of the invention, including also a novel construction such as to avoid interference with the upper of a long-legged boot, novel heel-rest controlling and adjusting mechanism, and various novel details of construction and combinations of parts, will now be more particularly described with reference to the accompanying drawings and thereafter pointed out in theclaims.

In the drawings,

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

Fig. 2 is a plan view of the machine;

Fig. 3 is a front elevation, on a larger scale than Fig. 1, illustrating in greater detail features of the shoe support or jack; I

Fig.4 is a vertical sectional view of certain parts shown in Fig. 3; and V Fig. 5 shows partly in front elevation and partly in section certain other parts shown in Fig. 3.

The'machine in which theinvention is herein illustrated as embodied, like that shown in the above-mentioned copending application, is pro wided withtoe lasting means comprising a pair of wipers 2 mounted for advancing and closing movements to embrace the toe of a shoe and to wipe the marginal portion of the toe end of the" upper m'aterials inwardly over an insole and, in the case of a'welt shoe, against a'lip on the insole. The'wipers 2 are advanced and closed by a hand lever 4 and are thrust still more forcibly againstv the shoe by fluid-pressure meanswhich it is unnecessary to'describe herein for an understanding of the present invention. The wipers also are raised by a double-acting treadle 6, connected to a vertically movable trunk I on which they are sup-ported, to wipe the upper heightwise of the toe before wiping'its marginal portion inwardly over the insole, and by this treadle they may be forced downward to increase their pressure on the upper in wiping it inwardly all as fully disclosed in the above-mentioned application. I

To position and hold the shoe for the operation of the wipers thereon there is provided a shoe support or jack so constructed as to receive and hold either riding boots with long legs or shoes with low uppers and which requires but little adjustment to adapt it for shoes of large or small sizes. The jack comprises an insole-engaging plate 8 which occupies a fixed position heightwise of the machine during the lasting operation and against which the toe portion of the insole is placed by the operator in presenting the shoe bottom upward to the machine, a toe rest It! ar- The insole-engaging plate 8 is a rigid member-'- curved in plan similarly to the toe end of an in-- sole so as to fit closely within and support the lip of a welt shoe insole around the toe portion during the lasting operation and its lower face lies;

generally in a horizontal plane. The plate is secured in a quickly detachable manner to the left-hand end of a horizontal shank 14 the righthand end portion of which is secured in a horizontal guideway formed in the upper face of an overhanging arm I 6 of a somewhat U-shaped jack casting I8. The central portion of the lower horizontal arm 20 of this casting, in the construction herein shown, is offset rearwardly, as indicated at 22 in Fig. 2, so that the upper of a long-legged boot may hang downwardly at the front of this offset portion without being obstructed by it.

The toe rest I!) (Fig. 3) comprises a rubber pad supported with freedom for rocking movement on the rounded upper ends of lugs 24 extending upwardly at the front and rear portions of .a member 26 mounted to swing about an axis extending lengthwise of the shoe in an arcuate guideway 28 formed in the upper end of a lever 30 which is pivotally supported between its upper and lower ends as hereinafter described. This lever is also pivotally supported at its lower end on a pin 32 adjustable by means of a screw 34 along a slot 36 formed in the left-hand end of a short link 38, the screw being threaded in the pin 32 and having thereon aknurled head for turning it. The link 38 is pivoted at its right-hand end on a horizontal pin40 secured in the left-hand end portion of the lower arm 20 of thejack casting I8. By adjusting the lower end of the lever 30 to the right or the left along the slot 36 and thereby swinging the lever the toe rest I 0 may be adjusted in directions lengthwise of a shoe for shoes of different sizes or. styles. About midwayl of its length the lever 30, as above suggested, is pivotally connected by a pin 42 to the left-hand end of a short curved lever arm 44 which is keyed at its right-hand end to the forward end of a rearwardly extending pin 46 rotatable in the lower arm of the jack casting. A second curved lever arm 48 is keyed at its lefthand end to the rear end of the pin 46, and the right-hand end of this arm extends into a slot formed in the lower'end portion ofa slide 56 which is mounted in upwardly extending guideways 52 formed in the inner sides of the upper portions of an upstanding bifurcated link 54. The arm 48 is pivotally connected to the slide 50 by a pin 56. The upper ends of tension springs 58 are connected to pins 60 projecting from the upper end of the slide 59 and to pins 62 projecting from the 1ink 54 at the lower end of the latter. These springs tend to maintain the slide 50 in a definite lowered position relatively to the link 54 determined by a plate 64 which is fast on the slide and abuts againstthe upper end of the link, and they also provide yielding means through which downward movement of the'link 5 4 causes the toe rest I 0 to be raised by the swinging of the arms 48 and 44; V

For imparting downward movement to the link 54, its lower end is pivotally connected to-the lefthand end of a substantially horizontal floating lever 66 which near its left-hand end is connected by a pivot pin 68 to the left-hand end of a bifurcated arm 10 of a three-armed lever 12. The lever 12 straddles the upper side of the floating lever 66 and is mounted below this lever on a pair of coaxial pins, 14 fixed respectively in the front wall of the rearwardly offset portion of the lower arm of the jack casting and in a web I6 (Fig. 2) parallel to the front wall of the lower arm and spaced from this wall rearwardly of the machine.

The two pins 14 are spaced somewhat toward the which connects its overhanging arm 56 to its lower arm 20. On the shaft 84 is secured a toothed segment or gear member 86 engaging a second toothed segment or gear member 88 secured on a jack-operating lever arm 96 which is mounted to swing about a fixed shaft 92 in the jack casting. The arm 90 extends upwardly as indicated in Fig. 1 when the machine is idle, and by swinging this arm in a counterclockwise direction as viewed from the front of the machine the three-armed lever 12 is rocked also in a counterclockwise direction about the pins I4, thereby swinging the lefthand end of the floating lever 66 downwardly and thus through the springs 58 imparting upward movement yieldingly to the toe rest I0.

Swinging movement of the floating lever 66 is also utilized to cause the heel rest I2 to move a vertical T-shaped guideway formed in a guide IIlZ-on the left-hand end ofa horizontalslide IM, the slide I04 being mounted in 'a guideway provided in the upstanding portion of the jack casting. The pin 98 actually passes through a slot I06 in the slide I6 and is fast in a plunger I08 slidingly mounted inthe upper end of the slide I60. The right-hand end of the plunger I08 has a plate I10 depending from it and provided on its right-hand face with ratchet teeth to cooperate with teeth formed on the left-hand face of the guide I02. The plunger I68 is urged toward the right by a spring plunger H2 in the slide I60. By pulling the heel rest I2 toward the left the teeth on the plate I II) can be readily disengaged from the teeth on the guide I 62 and the heel rest with the slide I06 may then be adjusted vertically to the most convenient position for engagement with any particular shoe.

A downwardly extending portion of the slide I60 has therein a screw H4 the head of which abuts against the lower end of the link 96. By turning this screw the heel rest may be swung about the pin 98 to accommodate it to the heightwise curvatures of the heel ends of different shoes. Spring-pressed plungers H6 located in thelink 96 above and below the pivotal connection of the heel rest to the link provide means aga nst which the heel rest may swing about this pivotal connection in one direction or the other in the jacking of the shoe to adjust itself better to the curvature of the heel end of the shoe. A vertical screw II8 threaded in the lower end of the guide I02 and a pin I20 in the upper end of the guide serve by contact with the slide I00 to prevent the slide from being moved vertically off its guideway.

The horizontal slide I04 for moving the heel rest toward the shoe comprises a pair of long and narrow horizontal plates I22 spaced apart at their left-hand ends by a shank I24 on the guide I02, to which shank the plates are secured, the plates nearer their right-hand ends being spaced apart by a distance piece I26 to which also they are secured. Near its right-hand end the slide I04 has positioned between its plates I22 a pair of comparatively short arms I28 which at their left-hand ends, with the parts positioned as shown in the drawings, have forwardly and rearwardly extending pins I30 mounted in holes formed in the plates I22. The right-hand ends of these arms are connected together by a pin I32, and that pin I30 which extends forwardly from the foremost arm has secured to it, at the front of the foremost plate I22, a'crank arm I34 in which is mounted a spring-pressed plunger I36 (Fig. 2) arranged to enter one or the other of two holes I38 formed in the plate I22 at opposite sides of the pin I30, depending upon the positions of the arms I28 as hereinafter explained. The right-hand end of the floating lever 68 is connected by a short link I40 to the left-hand end of a curved arm I42 of a bellcrank lever I44 mounted to turn on the shaft 84. The second arm I46 of this bell-crank lever, which is arranged to lie substantially beneath the slide I04, extends upwardly and toward the right and is connected by a link I48,located between the two plates I22, to the pin I32 which connects the two short arms I28.

From the above description it will be understood that the toe rest and the heel rest are operatively connected respectively to the opposite ends of the floating lever 86. When the floating lever is operated in the manner previously described by the three-armed lever I2 upon swinging movement of the arm 90, the left-hand end of the floating lever is first swung downwardly, the lever swinging about the connection at its right-hand end with the link I40, and by this movement of the lever the toe rest is moved upwardly toward and into engagement with the shoe. When the toe rest has clamped the shoe firmly against the plate 8 and its upward movement is stopped by the shoe, continued movement of the arm 90 causes the floating'lever to swing downwardly about the pivotal connection of its left-hand end' with the link 54, and in this movement its right-hand end swings the bellcrank lever I44 in a counterclockwise direction and thus imparts to the heel rest through the link I 48 and the slide I 04 a movement toward the left to cause it to abut against the heel end of the shoe.

The arms I28 may be positioned to extend toward the right from their pivot pins I30, as shown in Figs. 2 and 3, or by swinging the crankarm I34 through an arc of 180 may be positioned to extend toward the left from the pins, the spring plunger I36 by entering the appropriate hole I38 maintaining them in either of these positions. Since the arms I28 are connected as described to the link I48, their swinging movement serves to move the slide I04 to the left or the right through a distance equal to twice the length of the arms I28. A simple and convenient means is thus provided whereby the heel rest I2 may be quickly adjusted. to operate more effectively on shoes of comparatively large sizes or shoes of comparatively small sizes. The crank arm I34 carries a small knob secured to the spring plunger I38 whereby this plunger may be withdrawn from either of the holes I38.

In order to relieve the above-described heelrest-operating mechanism of strain due to the heelward thrust of the shoe against the heel rest in the lasting operation, the machine herein shown, in general similarity to the machine shown in Letters Patent No. 1,993,117, is provided with a pawl-and-ratchet device arranged to act on the slide I04. This devicecomp-rises a series of ratchet teeth I50 formed on a plate secured'to the slide I04 and a pair of staggered pawls I52 arranged to engage the ratchet teeth to hold the slide against movement toward the right after the heel rest has engaged the shoe. These pawls are fast on a pin I54 rotatable in the upwardly extending portion of the jack casting and they are urged toward the ratchet teeth by springs I58. In order to disconnect the pawls from the ratchet teeth when the arm is swung in the direction to release the shoe from the jack, a lever I58 is secured on the rear end of the pin I54. This lever carries a pin I80 which lies to the left of upstanding fingers on the pawls and acts when the lever I 58 is swung in a clockwise direction to disconnect the pawls from the ratchet teeth. For

swinging the lever I58 by the movement of the arm this arm carries a pin I62 arranged to engage a curved tail portion I64 of the lever.

As previously described, the toe rest I0 is forced yieldingly against the shoe through springs 58 connecting the slide 50 to the left-hand end of the floating lever 68, and it will be evident that by reason of their relation to the floating lever these springs are also yieldable in response to resistance of the shoe to the pressure of the heel rest against it. In order to afford increased insurance that shoes of different sizes will be firmly clamped by the toe and heel rests, the machine herein shown is further provided with means whereby the toe and heel rests are thrust positively against the shoe after they have engaged it yieldingly. They are thereafter maintained in pressure-applying relation to the shoe by reason of the fact that by the operative movement of the arm 90 the double link 80, connected-to the three-armed lever I2, and the short arms 82 on the shaft 84 are moved into substantially parallel relationto provide what is, in effect, a straightened toggle to maintain the toe and heel rests in operative positions until the arm 00 is swung reversely, i. e., to the right. Swinging movement of the arm80 to its operative position is limited by a suitable stop (not shown). 1

The means for rendering the springs 58 ineffective, so that the toe and heel rests will be forced positively against the shoe, is mounted on the upper end of the link 54 which carries the slide 50 to which the toe rest is connected. This means acts at a suitable time to render the link 54 positive in its action on the slide 50, as far as downward movement is concerned, so that further bodily downward movement of the floating lever 66 effected by the three-armed lever I2 will act positively both on the toe rest and on the heel rest. The slide 50 has teeth I65 formed along its right-hand face'and the link 54 has a bracket- I68 extending toward the right from its upper end,

in which bracket are slidingly mounted three pawls I10, one only of which is shown in the drawings. These pawls are arrangedrside by sideand have teeth I12 on their left-hand ends. The teeth on the three pawls are in staggered relation heightvvise of the machine and are arranged to engage the teeth I66 on the slide 50 at a certain time. The bracket I68 has a substantially horizontal guideway for the pawls I10, anda cover plate I14 fasten the bracket under thepawls supports them in the guideway. The bracket also has two coaxial bearings I16 for a sliding rod I18, the bearings being spaced apart to provide room between them for a pawl-controlling yoke I secured by screws on the sliding rod. A pair of springs I82 between the left-hand bearing I18 and the yoke I80 tend to force the yoke and the .rod .I18 toward the right, and a depending portion I84 of the yoke acts on upstanding portions I88 of the pawls to move the pawls also in that direction, the movement of the yoke being limited by contact with the right-hand bearing I16. Springs I88 located between the ends of pockets formed in the yoke I80 and in the pawls I10 tend to force the pawls toward the left to engage their teeth with the teeth I68.

Until after the toe rest and the heel rest, however, have actually engaged the shoe the yoke I80 remains in the position shown in Figs. 3 and Q with the pawls I10 out of engagement with the teeth I66, so that the toe and heel rests may be forced yieldingly against the shoe. At a suitable time thereafter the rod I18 is moved toward the left to permit the pawls I10 to engage the teeth I68 so that the slide 50 becomes connected to the floating lever 66 for positive downward movement. For this purpose there is threaded in the right-hand end of the rod I18 a stud I90 having an enlarged head, and the double link 80 which connects the three-armed lever 12 to the arms 82 on the shaft 84 has an ear I92 projecting upwardly from its left-hand end and provided with a pin having a roll I94 thereon. This roll lies in the same vertical plane, extending from right to left, as the head of the stud I 90, this plane being far enough to the rear for the parts to clear the upper of a long-legged boot, and during the final portion of the movement of the link 80 toward the left in the jacking of the shoe the roll strikes against the head of the stud I90 and thus moves the yoke I89 toward the left to cause the pawls I10 to engage the teeth I55. The link 80 continues to move a little farther toward the left after the roll I94 has engaged the stud 590, as the arm 90 nears the position in which it remains while the shoe is clamped in the jack, and in this movement the link depresses the floating lever 66 a little farther through the three-armed lever 12. Since the heel rest I2 is connectedby positive mechanism, including thebell-crank lever I44 and the links I40 and I48, to the right-hand end of the floating lever 86, and since the toe rest I0 is at this time positively coupled tothe left-hand end of the floating lever as described, the further depression of this lever serves to force the toe rest and the heel rest positively against the shoe, whatever may be the size of the shoe, thus in-' Suring against displacement of the shoe in the jack in the lasting operation. As previously stated, the toe rest and the heel rest are maintained in their operative positions by the straightening of the toggle device provided by the link 80 and the arms 82. The toe rest I9 is formed of rubber so that it may yield sumciently to avoid damage to the shoe or the jack mechanisrn. The exact time in the jacking of the shoe when thetoe rest and the heel rest are forced positively against it may be varied by adjusting the amount which the stud I90 is screwed into the rod I18, so as to vary the distance that the roll I94 has to travel before engaging the stud.

The above-described operating mechanism for the toe and heel rests is such as to permit them to engage and hold securely shoes of widely varying, sizes and styles, the heel rest being adjustable in, directions lengthwise of the shoe by the crank arm I34 and the toe rest beingadjustable, if necessary, by the screw 34in the manner previously explained. Portions of the operating mechanism for the toe and heel rests are displaced rearwardly of a vertical plane passing through these rests so as to permit the upper of a long-legged boot to hang freely down without being obstructed by any portion of this mechanlsm.

The left-hand end of the lower horizontal arm 20-of the jack casting has extending through it a vertical bore the axis of which is substantially in position to pass through the extreme toe end of the shoe clamped in the jack. A vertical pivot pin I96 extends upwardly into this bore from a socket member I98 which is supported by a pair of coaxial pins 200 in the upper end portion of a bifurcated link 202 thelower end portion of which straddles a part of the frame and is pivoted on a pin 284m the frame (Fig. 1). The right-hand end of the lower horizontal arm of the jack casting carries a short pin 206 secured in a lug 208 depending therefrom, and a roll 2I0 is mounted on this pin. This roll rests on a flattened upper face of 5a forwardly and rearwardly extending rod 212 the opposite ends of which are secured to portions of the bifurcated upper end of an upstanding link 2 I4 similar to the link 202 and substantially parallel to the latter. The lower end of the link 2 I 4 is bifurcated and straddles the top portion of an upstanding web: 2I6 on. the frame,

and it is pivotally mounted on a pin H8 in the.

web. The jack casting may swing about the vertical pin I96 in a forward or rearward direction in the lasting operation in response to pressure of one lor the other of the wipers 5 on the shoe so that the wipers may bear evenly on the opposite sides of the shoe. and 2I4 are of the same length and their lower pivotal supports are at the same height. The links are tied together at their upper ends by means of a substantially horizontal rod 220 oifset rearwardly from beneath the overhanging arm I9 of the jack casting. The rear end of the rod 262 extends through the right-hand end of the rod'220, and through the left-hand end of the latter extends the rear end of one of the pins 230 connecting the socket member I 98 to the link 2 2;

'Pivoted on the two pins 200 are' the righthand ends of a pair of substantially horizontal rods 222 extending to the left at the front and rear of the bearing through which the vertically movable trunk 1 extends, only one of these rods being visible in the drawings. The left-hand ends of these rods (Fig. 1) are pivoted on pins which extend from a trunnion member 224 into portions of the bifurcated upper end of a link 226 similar to the links 202 and EM and parallel to them, the link 226 being pivoted at its lower end one; pin 228 secured in a lug 230 on the frame. A rod 232 extends toward the right and somewhat upwardly through the trunnion 224 and through vertical slots provided in the vertically movable The twoparallel links 202 trunk i and its bearing. The rod 232 also extends toward the left and has at its left-hand end a hand wheel 234 for turning it. Collars 236 are pinned to the rod 232 at the opposite sides of the trunnion 224, and a coil spring 238 is located between the right-hand side of the trunnion and the corresponding collar 236 to provide frictional resistance against undesired rotation of the rod 232. The rlg1t-hand end of the rod 232 is threaded into a socket member 240 which is pivotally mounted on a pin 242 secured in the upper end of an upwardly extending arm 2% of a bell-crank lever 246 mounted on a pin 248 in the frame. A second arm 253 of this bell-crank lever extends downward and toward the left and has an upper flat face covered by a leather pad 252. When no shoe is clamped in the jack this pad is arranged to engage a flattened lower face of a pin 254 which is secured in the frame. The two links 262 and 2M on which the jack is supported, and also the third link 226, are somewhat inclined toward the right when there is no shoe in the jack, so that the weight of the jack acts through the rod 232 to maintain the arm 25!] of the bell-crank lever 2st in contact with the pin 254. In this condition the jack is spaced to the right from the position which it occupies in the lasting operation a distance which may be varied by turning the rod 232 through its hand wheel 236. Since the rod 232 is prevented from moving lengthwise relatively to the trunnion 224 on the link 2.26 and is threaded in the socket member 2 16, the position of which is determined by the bell-crank lever 2 36 and the pin 254, the link 226 is necessarily swung by the turning of the rod and causes equal swinging movements of the jack-supporting links 252 and The jack is moved a predetermined distance toward the wipers simultaneously with the clamping of the shoe by the toe and heel rests. For this purpose the three-armed lever 12 has a downwardly extending arm 256 the lower end of which is connected by a link 258 to the lower end of a depending arm 266 of a bell-crank lever 262 which is mounted on a pin 2% located in-the jack casting in substantially the same forward and rearward vertical plane as the pin I96 about which the jack swings. The second arm 266 of this bell-crank lever extends toward the left and is connected by a ball joint to the upper end of a link 268. The lower end of this link is connected, also by a ball joint, to the previously mentioned bell-crank lever 246, the point of connection between this link and the bell-crank lever 246 being located substantially between the two arms of the latter. Accordingly, as the three-armed lever 12 is operated to clamp a shoe by means of the toe rest and the heel rest as previously described, it acts at thesame time to swing the bell-crank lever 262 in a counterclockwise direction and thereby to impart a similar movement to the bell-crank lever 245. It will be evident that this movement of the bell-crank lever 246 causes the link 226 to be swung toward the left, and since this link is connected to the links 262 and 2M, these links are swung in the same direction and carry the jack with them. The jack is maintained in the position to which it is thus carried by the links through the same means which maintains the toe and heel rests in operative positions, i. e., by the toggle arrangement provided by the link 86 and the arms 82 connecting this link to the shaft 34.

' Since the arm 96 is always moved to the same position injacking' a shoe of whatever size, the amount of movement of the jack toward the wipers will always be the same. This may, for example, be about two inches, so as to provide sufficient clearance between the wipers and the plate 8 to permit the shoe to be readily positioned against the plate without interference by the wipers. It will be evident, however, that the exact position to which the jack is moved may be varied as desired by means of the hand wheel 234 which by its rotation varies the initial or starting position of the jack.

The

links

202 and 2 l4 supporting the jack may be, for example, about seven inches'in length, and they swing but a short distance in moving the jack toward the wipers as above described. The links, moreover, are initially inclined but little from the vertical, and in moving thejack they swing substantially to .verticalposition's. In'this operation, therefore, the upward movement of the upper ends of the links is so slight as to impart but a very small heightwise movement to the jack and shoe. Since thelinks are parallel, no tipping of the shoe takes place in the movement of the jack.

Inorder to provide further support for the jack an additional link 210, of the samelength as the links 202 and 2M and parallel thereto, is pivoted on the frame between these links but is offset rearwardlytherefrom. The link 210 has secured in spaced ears. atits upper end a pin on which is, pivoted an arm. 212 extending toward the right and pivoted at its right-hand end on the rear end of the. rod ,2l2 to which the link 2M is connected as previously described.

This insures that thelink 210 willalways remain parallel to the other jack-supporting links. The arm 212 has extending upwardly from it above the link 210 a pair of ears in which is secured a horizontal pin 2'! (Fig. 2) which is substantially radial to the pin I96 on which the jack swings laterally, and on this pin 214 is mounted a vroll 216 which bears against a track face 218 (Fig. 3) extending rearwardly and toward the left from the lower arm of the jack casting so that the roll and track face maintaintheir engagement during swinging movements of, the jack about the pin I96.

The machine is further provided with a knee-' operated jack release device 286 which the operator may use insteadof the arm 90 to cause the jack to withdraw from the wipers and releasethe shoe. This device includes a depending rod 282 secured adjustably in a bifurcated yoke 284 which is pivoted on the ends of the rod 2l2. The yoke 284 has a face 286 so arranged that when the device 280 is swung'toward the right to unjack the shoe this face strikes against the lowerend of a plunger 288 slidingly mounted in the jack casting. On its upper end (Fig. 5) this plunger has a head arranged to strike against a finger 296 secured on'the gear sector 86 and thus to turn the shaft 84 in a counterclockwise di-' rection to break the toggle ,80, 82. When this occurs the toe and heel rests are returned to their starting positions and the weight of the jack parts, assisted by a spring hereinafter referred to, causes the jack to be returned toward the right to its inoperative position. As the link 54 to which the toe rest is connected rises during the unjacking of the shoe and as the roll I94 which causes" the pawls H0 to engage the teeth on the slide 5llf moves toward the right, these pawlsare moved out of engagement with the slide by the action of the springs I82 on the yoke member I80. I

In order'to assist the operator in beginning to move the jack toward or away from the wipers there is provided means which gives an impulse to the jack in the desired direction when the operator swings the arm 90 in the appropriate direction. This means comprises

springs

292, 294 mounted loosely on the forward one of the two previously mentioned rods 222 (Fig. 1), these springs bearing respectively at their outer ends against

collars

296, 298 clamped. on the rod. A lug 30B fixed on the bearing for the trunk 1 surrounds the rod 222 between the inner ends of the springs, and the springs are spaced so far apart that when the jack is in its inoperative position the left-hand end of the right-hand spring 294 is spaced somewhatfrom the lug 3lilll, while the right-hand end'of the left-hand spring 292 abuts against the lug and is under compression. When the jack begins to move toward the wipers, therefore, the spring 292 expands and assists initially in such movement of the jack, and since the jack rises slightly as it moves in this direction, this spring may conveniently be somewhat stronger than the spring 294. As the jack approaches its operative positionthe spring 292 moves out of engagement with the lug 300 and the spring 294 engages it and becomes somewhat compressed. Therefore, when the jack later begins to move toward inoperative position the spring 294 expands to assist in such movement of the jack. 7 V

By reason of the arrangement of the gear sectors 88, 88 and the length of the arm 90, this arm operates the jacking mechanism with considerable mechanical advantage, thus lightening the Work of the operator. This arrangement, moreover, gives the desirable result that movement of the jack toward the left and toward the right is eiiected by swinging movements of the arm 90 in those same directions.

' Having described the invention, what I claim as new and desire to secure by Letters Patent of the United States is: 1. In a machine for operating on shoes, a shoepositioning device for engaging the bottom of a shoe, a toe rest and. a heel rest for engaging the shoe respectively at the top of the forepart and at the heel end to hold the shoe, and mechanism movable by the-operator to force said toe rest and heel rest first yieldingly and then positively against the shoe after the shoe has been presented in contact with said shoe-positioning device.

2. In a machine for operating on shoes, a shoe-positioning device for engaging the bottom of a shoe, a toe rest and a heel rest for engaging the shoe respectively atthe top of the forepart and at the heel end to hold. the shoe, a member common to said toe rest and heel rest and movable by the operator to force them against the shoe, and mechanism controlled by said member for operating said toe and heel rests first yieldingly and then positively.

- 3. In a machine for operating on shoes, a shoepositioning device for engaging the bottom of a shoe, a toe rest and a heel rest for engaging the shoe respectively at the top of the forepart and at the heel end to hold the shoe, a member common to said toe rest and heel rest and movable by the operator to force them against the shoe, and mechanism for operating said toe and heel V rests by the movement of said member, said mechanism comprising parts relatively movable against yielding resistance upon engagement of the toe and heel rests with the shoe and also means for thereafter positively connecting said parts to force the toe and heel rests unyieldingly against the shoe.

4. In a machine for operating on shoes, a shoepositioning device for engaging the bottom of a shoe, a toe rest and a heel rest for engaging the shoe respectively at the top of the forepart and at the heel end to hold the shoe, a member movable by the operator to force said toe and heel rests against the shoe, a floating lever operated by said member, connections between said floating lever and the toe and heel rests including a spring yieldable upon engagement of said toe and heel rests with the shoe, and means for substituting a positive connection for said spring in the continued movement of said member.

5. In a machine for operating on shoes, a shoe positioning device for engaging the bottom of a shoe, a toe rest and a heel rest for engaging the shoe respectively at the top of the forepart and at the heel end to hold the shoe, a member movable by the operator to force said toe and heel rests against the shoe, a floating lever operated by said member, positive connections between one end of said floating lever and the heel rest, connections between the other end of said lever and the toe rest including a spring yieldable upon engagement of the toe and heel rests with the shoe, and a device for rendering the connections between the lever and the toe rest positive in the continued movement of said member.

' 6. In a machine for operating on shoes, a shoe positioning device for engaging the bottom of a shoe, a toe rest and a heel rest for engaging the shoe respectively at the top of the forepart and at the heel end to hold the shoe, a member movable by the operator to force said toe and heel rests against the shoe, intermeshing gear members arranged to be operated by said first-named member, and connections between one of said gear members and the toe and heel rests for operating them.

'7 In a machine for operating on shoes, a shoepositioning device for engaging the bottom of a shoe, a toe rest and a heel rest for engaging the shoe respectively at the top of the forepart and at the heel end to hold the shoe, a member movable by the operator to force said toe and heel rests against the shoe, intermeshing gear members arranged to be operated by said first-named member, a crank armoperated by one of said gear members, a link connected to said crank arm, and connections between said link and the toe and heel rests for operating them, said crank arm and link being movable to positions in substantially parallel relation to each other for maintaining the toe and heel rests in shoe-hold ing positions.

8; In a machine for operating on shoes, a shoepositioning device for engaging the bottom of a shoe, a toe rest and a heel rest for engaging the shoe respectively at the top of the forepart and at the heel end to hold the shoe, a floating lever connected to said toe and heel rests for moving them against the shoe, and mechanism including intermeshing gear members movable by the operator to operate said floating lever.

9. In a machine for operating on shoes, a shoepositioning device for engaging the bottom of a shoe, a toe rest and a heel rest for engaging the shoe respectively at the top of the forepart and at theheel end to hold the shoe, a floating lever connected to said toe and heel rests for moving them against the shoe, another lever connected to said floating lever for operating the latter, a link connected at one end to said other lever, a crank arm connected to the other end of said link, and a member movable by the operator to operate said crank arm.

10. In a machine for operating on shoes, a shoe-positioning device for engaging the bottom of a shoe positioned bottom upward, a toe rest and a heel rest for engaging the shoe respectively at the top of the forepart and at the heel end to hold the shoe, a floating lever, means for moving said floating lever in a downward direction, and connections between said floating lever and the toe and heel rests for raising the toe rest and for moving the heel rest toward the heel end of the shoe by the downward movement of thegfloating lever.

11. In a machine for operating on shoes, a shoe-positioning device for engaging the bottom of a shoe positioned bottom upward, a toe rest and a heel rest for engaging theshoe respectively at the top of the forepart and at the heel end. to hold the shoe, a floating lever, means for moving said floating lever in a downward direction, a lever connected to said toe rest and movable to raise the toe rest by the downward movement of the floating lever, and lever-and-link connections between the floating lever and the heel rest for moving the heel rest also into engagement with the shoe by the downward movement of the floating lever.

12. In a machine for operating on shoes, a shoe-positioning device for engaging the bottom of a shoe, a toe rest and a heel rest for engaging the shoe respectively at the top of the forepartand at the heel end to hold the shoe, a member for moving said toe and heel rests against the shoe, and connections between said member and the toe and heel rests for operating them, the connections to the heel rest comprising an arm mounted to swing adjustably to difierent positions for effecting a preliminary adjustment of the heel rest lengthwise of a shoe.

13. In a machine for operating on shoes, a shoepositioning device for engaging the bottom of a shoe, a toe rest and a heel rest for engaging the shoe respectively at the top of the forepart and at the heel end to hold the shoe, a slide supporting said heel rest and movable in directions lengthwise of the shoe, a link for operating said slide to force the heel rest against the shoe, and a device pivotally connected to said link and mounted on said slide for turning movement to efiect a preliminary adjustment of the slide relatively to the link.

14. In a machine for operating on shoes, the combination with means for operating on a shoe, of a shoe support, parallel links on which said shoe support is mounted for movements in directions lengthwise of a shoe thereon, said parallel links being arranged to be swung in a. direction to carry the shoe support away from said operating means by the weight of the support thereon and being movable reversely to carry the support with each shoe toward the operating means, mechanism for holding the support positively in position for the shoe to be operated upon and for thereafter releasing it from such positive control to permit movement thereof away from the operating means by gravity, and stop mechanism for limiting movement of the support away from the operating means.

15. In a machine for operating on shoes, the combination with means for operating on a shoe,

of a shoe support, parallel links on which said shoe support is mounted for movements in directions lengthwise of a shoe thereon, said parallel links being arranged to be swung in a direction to carry the shoe support away from said operating'means by the weight of the support thereon and being movable reversely to carry the support with each shoe toward the operating means, mechanism for holding the support positively in, position for the shoe to be operated upon and for thereafter releasing it from such positive control to permit movement thereof away from the operating means by gravity, a lever connected to the support, and a relatively fixed member for engaging said lever to limit movement of the sup-- port away from the operating means.

16; In amachine for operatingon shoes, the combination with means for operating on ashoe, ofa shoe support, parallel links on which said shoe support is mounted for movements in directions lengthwise of a shoeth-ereon, said parallel links being arranged to be swung in a direction to carry the shoe support away from said operating means by the weight of the support thereon and being movable reversely to carry the support with each shoe toward the-operating means, and a spring arranged to assistin initiating the movement or" the support away from the operating means.

1'7. In a machine for operating on shoes, the combination with means for operating on a shoe, of a shoe support, parallel links on which said shoe support is mounted for movements in directions lengthwise of a shoe thereon, said parallel links being arranged to be swung in a direction to carry. the shoe support away from said operating means by the weight of the support thereon, means for moving the support toward the operating means, and a spring arranged to assist in initiating such movement of the support toward the operating means.

18. In a' machine for operating on shoes, the combination with means for operating on a shoe, of a shoe support provided with means for clamping a shoe thereon, a member movable to operate said clamping means, parallel links on which said shoe support is mounted, for movements toward andfrom said operating means, and mechanism arranged to be operated by said member to impart to the shoe support a movement toward the operating means accompanied by the swinging of said parallel links.

19. In a machine for operating on shoes, the combination with means for operating on a shoe, of a shoe support provided with means for clamping a shoe thereon, a member movable to operate said clamping means, parallel links on which said shoe support is mounted for movements toward and from said operating means, a lever mounted independently of the shoe support and arranged to be operated by said member, and means for imparting to the shoe support a movement toward the operating means by the movement of said lever.

20. In a machine for operating on shoes, the combination with means for operating on a shoe, of a shoe support provided with means for clamping a shoe thereon, a member movable to operate said clamping means, parallel links on which said shoe support is mounted for movements toward and from said operating means, a lever mounted independently of the shoe support, connections between said member and lever for swinging the lever by the movement of said member, and connections between the lever and the parallel links 15 for moving the shoe support toward the operating means by the swinging of the lever.

21. In a machine'for operating on shoes, the combination with means for operating on a shoe, of a shoe support mounted for movements toward and from said operating means and provided with means for clamping a shoe thereon, a member on the shoe support movable by the operator to operate said clamping means, a lever mounted independently of the shoe support and arranged to be swung by the movement of said member, and means for imparting to the shoe support a movement toward said operating means by the swinging of said lever.

22. In a machine for operating on shoes, the combination with means for operating on a shoe, of a shoe support mounted for movements toward and from said operating means and provided with means for clamping a shoe thereon, a member on the shoe support movable by the operator to operate said clamping means, a lever mounted independently of the shoe support but connected thereto to swing as the shoe support moves toward or from said operating means, a' stop arranged to engage said lever to limit movement of the shoe support away from the operating means, and connections between said member and lever for operating the lever to move the shoe support toward the operating means by the movement of said member.

23. In a machine for operating on shoes, the combination with means for operating on a shoe, of a shoe support mounted for movements toward and from said operating means and provided with means for clamping a shoe thereon, a

. lever mounted on the shoe support to swing in directions toward and from the operating means, and mechanism for operating said clamping means to clamp a shoe and for moving the shoe support toward said operating means by the swinging of said lever in that direction.

24. In a machine for operating on boots and shoes, the combination with means for operating on the toe end of a boot or shoe, of a work support provided with upper and lower arms connected together and extending toward said operating means, said work support having means for supporting a long-legged boot bottom upward and being mounted to swing laterally about an axis located in the vicinity of the toe end of the boot, and a portion of said lower arm being ofiset laterally to clear the depending leg of the boot. 7 25. In a machine for operating on boots and shoes, the combination with means for operating on the toe end of a boot or shoe, of a work support provided with upper and lower arms connected together and extending toward said operating means, a device supported on said upper arm for engaging the bottom of the forepart of a long-legged boot presented bottom upward, a toe rest supported on said lower arm for clamping the forepart of the boot against said device, and a heel rest for engaging the heel-end face of the boot, a portion of said lower arm being offset laterally to clear the depending leg of the boot.

26. In a machine for operating on shoes, a heel rest for engaging the heel end of a shoe, a

depending link 'supporting'said heel rest and mounted at its upper end to swing about anaxis extending laterally of the shoe,.and means for adjusting the link about said axis.

27. In a machine for operating on shoes, a heel rest for engaging the heel end of a shoe, andspring means against the resistance of which said heel rest is movable in one direction or the other about an axis extending laterally of the shoe in response to pressure of the shoe against it.

28. In a machine for operating on shoes, a heel rest for'engaging the heel end of a shoe, a sup-. port for said heel rest adjustably movable in directions heightwise of the shoe, and spring-controlled retaining means movable to release said support and permit its adjustment and arranged to maintain it in different adjustedpositions.

29. In a machine for operating on shoes, 2. heel rest for engaging the heel end of a shoe, a slide supporting said heel rest and adjustably movable in directions heightwise of the shoe, a depending link supported at its upper end by said slide to swing'about an axis extending laterally of the shoe, means for adjusting the link about said axis, and means supporting the heel rest on said link for movement against yielding resistance about an axis extending laterally of the shoe for' better accommodation to the shape or positionof the shoe.

V WILLIALM THOMAS BUCKINGHAM ROBERTS.