US2187828A - Sole pressing machine - Google Patents

Description

Jan. 23, 1940. J FINN SOLE PRESSING mcunm Filed Oct. 5, 1938 2 Sheets-Sheet 1 Wl/E/V 70/1 ZirM WE; aw

Jan. 23, 1940. s. J. FINN l I 2,187,828

' SOLE PRESSING MACHINE Filed Oct. 5, 1938 2 Sheets-Sheet 2 M/EA/ 051 ratemeiimzaie io d I I 2,187,828

8 -f; 2,187,828 V 1 s "some PRESSING MACHINE v Sidney J. Finn, Beverly, Mass., .-,ass ignor;toillnited Shoe Machinery Corporation Borough of Flem ington, N. J., a corporation of.New Jersey Application October 5, 1938; Serial No. 288,381 g '23 Claims. (or 12-83); M V I I This invention relatesto machines for pressing Fig. l'isa side elevation of a machine embody soles on shoe bottoms and is illustrated'herein as ing the present invention; embodied in a machine for cement attaching soles Fig. 2" isa view similar to Fig. 1' of a portion of i I to shoes." f the maohinewith parts broken away and in sec- I 5- Objects of the invention are to provide in a tion; and; 5

sole pressing machine improved means arranged Fig; Sfis aplan'view ofthe mechanism shown to permit a sole with a "heel attached therto, in -Fig. 2: forming a complete sole and heel unit; to be Tlie'invention is illustratedherein by way or;

pressed against a shoebottomtoeifect its permaexample-as embodied in a sole pressing .or atnent or temporary attachment thereto, and to tachi-ng machineof thetype disclosed in Letters 10 I provide improved mechanism for relativelyposi- Patent of'the United S -tates"No.'2f,0 l7,185 granted" tioning the shoe and thejsole and heel unit. JnlyiQl-QBS; on an'application filed in thename; To-the accomplishment of these objects the inof- Milton Ballard et a1. As disclosed in the vention provides, in accordance with one of its pateritreierred to the'machineis'p'rovided with features, improved means for en'gag'ingthe shank plurality ofpad boxes lilmoun'ted on"a rotary. 15 portion only of a sole having a heel attached turret ortable 12 (Fig. 1) arranged torotate thereto, said means resting on a supporting pad intermittently to present each pad box-in turn and being arrangedalso to engage the full height atanoperatingstation. A's herein illustrated, the of the breast of the heel on the sole and heel padi boxesare of the type disclosed in Letters unit. Asherein illustrated, the shank engag- Patent oi the United'states No. 2,063, 04 1,granted 20 ing means comprises an auxiliary pad of re'silient December'8, 1936, on an application filed in the material which is substantially wedge shaped in name of LloydG; Knowles and are particularly longitudinal section withthe' thick portion of adapted'for operating'upon large shoes such as the wedge adjacent to the ,breastof the heel, mens'shoes' Themachineis also provided, op-

the rear end'waIl or surface'ofthe auxiliary'pad positeea'ch padbox, with pressure applying abut- 25 being of sufficient size transversely of the supmerits it and lii'for engaging respectively the porting pad to engage the breast of the" widest, iorepart of a shoe A and the heel portion'of alast heel to be operated upon" at the opposite corners" B' in the shoe and applying pressure thereto; thereof; As illustrated, the auxiliary pad is piv powerjoperated means being provided'for moving otally connected to the forward end'of a fiat memthe abutments toward and away from the' siioe. 30 her or plate arranged to slide longitudinallyof As" disclosed inv the'Knowle'spatent each pad the supporting pad, a spring'being providedfor box liris providediatitsjforepart with a plurality constantly urging the auxiliary pad and plate of sole gages Bandit arranged to engage the v rearwardly of the supporting fpa'd. Theiplat'e opposite edge'faces of afsol'e positioned by an acts to hold'the auxiliary pad'onthe supporting operator on a padyin the'pad box and arranged 35- pad and'also acts as'a support for the tread sur-' to becomelocked upon engagementwith the sole.

face of the heel during thepressing operation. The sole gages Zil, as herein illustrated, carry In accordance with another feature oi'the inshoe gages 22 (Fig; 1) against which the shoe is I vention improved means is provided for rela-J placedwhenit is mounte'don the'sole so that its 40 tively positioning the shoe and the sole and heel forepart will be properly positioned relatively 40 unit lengthwise, this means, asherein illustrated, to the sole. At its rear or heel end thepad box comprising a heel sa arranged for yslidingmovecarrie's'twosets of equally and oppositely m'ovabIe t w se of t e sup pad'and heeIp'ositioning-gages 24' and 26, the ages'ia' Tying a 81106 gage for determining imposition of being normally arranged to engage'the opposite assists sir s;essentialist? at r es was 9 ing relative adjustment of the heelgage and" shoe bemg i to Engage the opposite Sides of the age and further means is provided formaintainheeLpOm-On of the h and ion it a l ing the gages in'any position into which they may f j 5. Thisets of g f' operated be moved lengthwiseof t e supporting-pad; pec Ive y by ransveise s d 8 and 30, the 501 -With the above and other objects and features Shde' 23' belPg'actuated by tlTeadlev (notishown) in view, the invention will now be described in i and the shde 33 by swmgmg frame m connection with the accompanyingdrawingsand (Figlfl) which carries, theflpressure applying will-thereafter be pointed out'in the claims'; abutments M, It a and is connected to the slide m the r I x 3ll by'a'lever'34'and'intermediate connections 36, 55

as fully disclosed in the Knowles patent mentioned above.

The gages 24 and 25 and their operating mechanisms, including the slides 28 and 30, are mounted in a plurality of castings 38 pivotally supported at 45 on a horizontal member 42, the latter being adjustably secured by a wing nut 44 to a shelf 46 extending horizontally from a vertical slide 48 arranged to travel in ways formed on the opposite sides of the pad box. The slide 48 is yieldingly supported in its uppermost position on the pad box by springs 50 so that it can yield under pressure applied to the sole and shoe by the abutments l4 and IS.

The present invention, as indicated above, is particularly concerned with the cement attachment to shoes of outsoles to which heels have been previously attached to form complete sole and heel units. Accordingly, the pad box 10 is provided with a flexible or deformable pad 52, herein shown as a hollow vessel of rubber, filled with a fluid 54 (Fig. 2) such as water, and having its sole engaging surface molded to conform substantially to the shape of the bottom of a last or shoe. The pad 52 is provided at its rear portion with a relatively narrow longitudinal depression or slot 56 formed when the pad is molded, this depression being preferably located at the central portion of the pad and extending to its heel end.

Resting on the upper surface of the pad 52 is'a separate auxiliary pad 58 having an upper surface 65 substantially complemental in shape to the shank portion of a shoe and adapted to engage only the shank portion of a sole S placed on the pad 52, the sole having a heel H assembled thereon which is attached to the sole in the usual manner by cement or nails, or both, to form a complete sole and heel unit prior to the attachment of the sole to the shoe bottom. The auxiliary pad 58 is preferably composed of resilient material such as rubber or a composition thereof and, as shown in the drawings, is substantially Wedge shaped from front to rear with the thick end of the Wedge at the rear. The

. rear edge of the pad 58 is straight in plan view and the pad has a forward edge that is curved transversely to approximate the shape of the ball or break line at the forward end of the shank portion of either a right or left shoe, the shoe in the present case being a right shoe. At its thick end the auxiliary pad 58 has an upstanding surface 52 of sufiicient width to engage the breast of the largest heel to be operated upon at the opposite corners of said breast and the pad is of sufiicient thickness at its rear portion so that the vertical surface 62 will be as high as, or slightly higher than, the heels on the usual run of mens shoes, thereby enabling this surface to engage the breast of the heel from the tread surface of the outsole to the tread surface of the heel.

The auxiliary pad 58 is provided near the lower side of its rear portion with a horizontal cut or slot 54 which produces a relatively thin lower layer or flap 66 extending across the full width of the pad. It is also provided at its opposite side walls with depressions 88 and 18 the purpose of which will be explained hereinafter. Riveted to the upper side of the lower flap 66 adjacent to its rear end is a thin plate 12 to which is pivotally secured by a shoulder screw 14 a fiat plate 15 which extends rearwardly beyond the back wall of the pad box l8 and rests atits rear portion upon a horizontal supporting plate 18 provided with a central slot 80, the

plate 18 being rigidly secured to the upper end of the slide 48 by screws 82. The slide 43 and the upper end of the rear wall of the pad box [0 have formed in their central portions horizontal slots 84, as shown in Figs. 1 and 2. Although the thick end of the wedge shaped pad 53, as pointed out above, is preferably made thick enough to engage the full height of the breasts of the usual run of heels, it is possible to increase the thickness of this portion of the pad 58 is necessary for extremely high heels by inserting wedge shaped pieces of rubber in the cut or slot 64.

The rear portion of the plate 16, as shown in Fig. 3, is curved rearwardly to approximate the semi-circular shape of the back end of a heel and the plate is arranged to slide longitudinally of the pad box between the opposite side walls of the box in the plane of the upper surface of the pad 52. The plate is prevented fromv being raised above the side walls of the pad box by gibs 98, 92 secured to the opposite sides of the pad box by screws 94 and arranged to overlie the opposite edge portions 8'3, 88 of the plate. The depressions 68, '28 in the auxiliary pad 58 provide clearance for the gibs 90, 92 as the pad 58 is moved rearwardly with the plate 16. Near its forward end and substantially on the longitudinal median line of the pad box the plate 16 carries a downwardly projecting pin 96 (Fig. 2) to which is fastened a rearwardly extending tension spring 98 which is secured at its other end to a downwardly extending pin I mounted in the rear end of the supporting plate 18, this latter plate being curved at its rear portion similarly to the plate 15. The spring 98 is located in the slot 56 in the pad 52 and it passes through the slots 84 (Fig. l) in the slide 48 and pad box l8 and tends constantly to urge the plate 16 and the auxiliary pad 58 rearwardly toward the heel end of the pad 52. The rearward limit of movement of the plate 16 is determined by a shoulder or head on the pin I08 which extends into a slight depression or groove I82 formed in the lower surface of the rear portion of the plate 16, the shoulder being arranged to engage the forward end of this groove when the plate is in its rearward position.

It will be seen from the above that the auxiliary pad 58 and the fiat plate 16 are constantly urged rearwardly by the spring 98 but they may be moved forwardly in the plane of the upper surface of the pad 52 against the tension of the spring. Moreover, the pad 58 may pivot laterally of the pad box relatively to the plate 15 about the screw 14 so that it may adjust itself automatically to the transverse angle of the breast of the heel which the vertical surface 52 of the pad is arranged to engage. In addition to the foregoing the auxiliary pad and plate 73 may move heightwise of the pad box with the upper surface of thepad 52 as that surface is deformed under pressure. In placing the sole S with the assembled heel H on the pad 52, the operator engages the vertical surface 62 of the auxiliary pad 58 with the breast of the heel and moves the sole and heel unit forwardly until the ball line of the sole is located in substantially the proper position relatively to the supporting pad 52. During this action the pad 58 is moved forwardly in front of the heel against the tension of the spring 98 into a proper position relatively to the pad 52. The pad 58 is also permitted by the pivotal connection 14 referred to to adjust itself laterally to the transverse angle 7 from turning on the screwiilb.

.position the shoe gages 22 for receiving the shoe.

engagement with the opposite edge faces of the sole, after which the gages become locked to position the forepart shoe gages 22 properly for locating the forepart of the shoe relatively to the sole.

In addition to the heel gages 2d and 253, which are arranged to locate the heel portions of the sole and shoe relatively to each other laterally of the pad 52, the present invention further provides gage mechanism for positively determining the proper position of the shoe longitudinally of the sole and heel unit, As herein illustrated, this on the pad. Secured in a horizontal slot Hi) formed in the upper surface of the slide W4 is a right angle member i ii, thismern'ber being secured in the slot'by a screw 8 M which extends through a lower slot H6 in the slide IM and thus permits the member M2 to be adjusted lon gitudinally of the pad relatively to the slide HM- and gage N38.

The upstanding portion of the member H2 is provided with a vertical slot Hi3 through which extends a screw Mil which secures to the member NE a shoe gage I22 provided on its back surface with rearwardly extending ribs I24, as shown in Fig. 3, whichoverlap opposite sides of the member M2 and thus prevent the gage I22 The gage I22 is, of course, adjustable heightwise on the inemher M2 by reasonofzthe slot i i-'8.

It will be seen from the foregoing that the lower gage Hi8 may be moved forwardly into engagement with the back end of the heel H of the sole and heel unit resting on the pad, thereby positioning the shoe gage 5'22 inthe proper position for locating the shoe longitudinally of the sole and heel unit- In order that the heel gages H38, I22 will be maintained in their operative position after the gage N33 has been moved by the operator into engagement with'the heel, friction means is provided for retain'ingthem in any position into which they -may be moved. As shown in Fig. 3, this'rneans comprises aspring pressed plunger Ht. mounted in a horizontal hole formed in the intermediate'casting 38 referred to and urged constantly toward the slide lii l by a compression spring i128, the spring. E28 being. retained in the casting by a screw I33.

In the operation of the mechanism comprising the present invention, the operator places the sole and heel unit on .the pad 52 after the attachingsurface of the unit has been prepared for cement attachment to the shoe bottom and hebring them into engagement with the sole and to I He next places the shoe, A upon the sole and heel unit and moves the heel gage i538 forwardly into engagement with the back end of the heel H, thereby positioning the shoe gage i2 2 for locating the shoe longitudinally of the sole and heel unit. As described in the Knowles patent, when the operator actuates the forepart gages he also, by the same treadle movement, actuates the heel sole gages 2'4 which; in the present instance, are arranged to engage the heel H instead of the sole and position the rear portion of the heel and sole unitlaterally of the pad 52. The operator next moves the swinging frame member 32 forwardly to swing the pressure applying abutments Hixand it into' operative position over the shoe A and the last B in. the shoe and, bythis movement of the swinging frame through the connections 3 3 6 referred to, he

operates the transverse slide 3b to actuate the shoe gages 26 which thereupon position the heel portion of the shoe laterally of the pad relatively to the sole and heel unit. After the shoe and the sole and heel unit. have been thus positioned the operator actuates the power mechanism of the machine to cause the abutments i4 and IE to descend .and press the shoe and the soleand heel unit forcibly against the pads 52 and 58, thereby causing the sole and heel unit to become permanently attached or, if desired, temporarily attaohed'to the shoe bottom.

The pad 52 will, of course, become deformed under the sole attaching pressure and its upper surface will be moved downwardly by the shoe and the sole and-heel unit. As stated above, the.

auxiliary pad 58 and the flat plate it will like wise move downwardly between the side walls of the pad box, the plate being-maintained in a substantially horizontal position by its engagement with the lower plate '58, thereby causing pressure to be applied to the entire tread surface of the heel H and, through the heel, to the heel portions of the sole and shoe to effect a. cement attachment of these portions to each other which and a sole having a heel attached thereto, and

an auxiliary pad mounted on said supporting pad for pivotal movement relatively thereto and having an upper surfaceadapted to engage the v shank portion onlyof the sole and an upstanding surface arranged to engage the breast of the heel on the sole, said upstanding surface being of sufficient width to engage the opposite corners of the breast of said heel.

2. A device for applying pressure to soles and shoes comprising a pad for supporting a shoe and a sole having a heel attached thereto, a separate pad resting on thesupporting pad and having an upper surface adapted to engage the shank portion of v the sole, and means ,arranged normally to urge said separate pad toward the heel end of said supporting pad. i

3. A device for applying pressure to soles and shoes comprising a flexible pad for supporting a shoe and a sole having a heel attached thereto,

an'auxiliary pad resting on the supporting ,padgg,

and having an upper surface shaped to engage only the shank portion of the sole and having a rear surface adapted to engage the breast of the heel, and non-flexible means connected to said auxiliary pad for engaging the tread surface of said heel.

4. In a sole pressing machine, the combination of a pad, means for pressing a shoe and a sole with a heel assembled thereon against the pad, and an auxiliary pad resting on the first-named pad and movable laterally thereof for engaging the shank portion of the sole, said auxiliary pad having a rear surface adapted to engage the breast of the heel.

5. In a sole pressing machine, the combination of a flexible pad having a surface for supporting a sole and shoe, means for pressing a shoe and a sole with a heel attached thereto against said pad, and a separate pad of resilient material resting on said flexible pad and movable in the plane of the supporting surface of said flexible pad for engaging the shank portion of the sole, said auxiliary pad having a rear upstanding surface wider than the heel and adapted to engage the breast of said heel.

6. In a sole pressing machine, the combination of a pad, means for pressing a shoe and a sole with a heel assembled thereon against the pad, and an auxiliary pad resting on the firstnamed pad and having a sole engaging surface substantially complemental to the shank portion of the sole, said auxiliary pad being movable longitudinally of the first-named pad in the plane of the upper surface of said first-named pad.

7. In a sole pressing machine, the combination of a fluid filled deformable pad, means for pressing a shoe and a sole with a heel attached thereto against said fluid filled pad, an auxiliary pad of solid but resilient material resting on the deformable pad and movable relatively thereto, said auxiliary pad having a surface thereon for engaging the shank portion only of the sole and another surface for engaging the breast of the heel, and means for normally holding said auxiliary pad in a predetermined position on said fluid filled pad.

8. In a sole pressing machine, the combination of a pad, means for pressing a shoe and a sole with a heel attached thereto against said pad, an auxiliary pad resting on the first-named pad and having a sole engaging surface adapted to engage the shank portion of the sole across its full width forwardly of said heel, and means arranged constantly to urge the auxiliary pad toward the rear portion of said first-named pad.

9. In a sole pressing machine, the combination of a flexible pad, means for pressing a shoe and a sole with a heel attached thereto against said pad, an auxiliary pad resting on the flexible pad and having a surface adapted to engage only the shank portion of the sole and an adjacent surface adapted to engage the breast of said heel, and means for permitting angular movement of said auxiliary pad laterally of said flexible pad.

10. In a sole pressing machine, the combina tion of a flexible pad, means for pressing a shoe and a sole with a heel attached thereto against said pad, an auxiliary pad supported by said flexible pad and arranged to engage the shank portion only of the sole forwardly of said heel, means for holding said, auxiliary pad on the flexible pad, and means arranged constantly to urge the auxlliary pad toward the rear end of said flexible pad. 1

11. In a sole pressing machine, the combination of a flexible pad for supporting a sole and shoe, means for pressing the shoe and a sole with a heel attached thereto against said flexible pad, an auxiliary pad of resilient material resting on the supporting pad and arranged to engage the shank portion of the sole, said auxiliary pad having a rear wall adapted to engage the breast of the heel on the sole, and non-flexible means pivotally connected to said auxiliary pad for engaging the entire tread surface of said heel.

12. In a sole pressing machine, the combination of a fluid filled pad for supporting a sole and shoe, means for pressing a shoe and a sole having a heel attached thereto against said pad, an auxiliary wedge shaped pad resting on the fluid filled pad and arranged to engage only the shank portion of the sole and the breast of the heel, and means for urging the auxiliary pad rearwardly of the fluid filled pad.

13. In a sole pressing machine, the combination of a pad for supporting a sole and shoe, means for pressing the shoe and a sole having a heel attached thereto against the pad, an auxiliary pad resting on the supporting pad and arranged to engage the shank portion of the sole forwardly of the heel, said auxiliary pad having a rear wall movable laterally and of suiflcient width to engage the breast of the heel on the sole at the opposite corners of the breast of said heel, a spring tending constantly to urge the auxiliary pad toward the heel end of the supporting pad, and a flat member connected to said auxiliary pad for engaging the tread surface of the heel.

1%. In a sole pressing machine, the combination of a pad for supporting a shoe and a sole with a heel attached to the sole, an auxiliary pad for engaging the shank portion only of the sole forwardly of the heel, and gage mechanism arranged to engage the shoe and the heel on the sole and position the shoe and sole relatively to each other lengthwise of the supporting pad.

15. In a sole pressing machine, the combination of a pad for supporting a shoe and a sole with a heel attached thereto, an auxiliary pad resting on the supporting pad and arranged to engage the shank portion of the sole and the breast of the heel, a gage movable into engagement with said heel, and means carried by said gage for determining the position of the shoe relatively to the sole.

16. In a sole pressing machine, the combination of a pad for supporting a shoe and a sole with a heel assembled thereon forming a complete sole and heel unit, means for pressing the shoe and the sole and heel unit against the pad, an auxiliary pad resting on the supporting pad and arranged to engage only the shank portion of the sole forwardly of the heel, said auxiliary pad having an upstanding wall adapted to engage the breast of the heel, a gage rearwardly of the supporting pad movable into engagement with the rear end of the heel, and another gage carried by the heel gage for determining the longitudinal position of the shoe relatively to the sole and heel unit.

17. In a sole pressing machine, the combination of a pad for supporting a shoe and a sole with a heel attached thereto, means for pressing the shoe and sole against the pad, an auxiliary pad resting on the supporting pad and adapted to engage the shank portion only of the sole, means tending constantly to move the auxiliary pad toward the heel end of the supporting pad, 2. gage into which they are moved.

18. In a sole pressing machine, the combination of a pad for supporting a shoe and a sole with a heel attached thereto, means for pressing the sole and shoe against said pad, an auxiliary pad resting on the supporting pad and having an upper surface adapted to engage the shank por-' tion of the sole and a rear' surface adapted'to engage thebreast of the heel, a gage movable lengthwise of the pad for engaging the back of the heel on the sole, another gage carried by the heel gage for determining thelongitudinal position of the shoe relatively to the sole and heel, and means whereby said gages'may be adjusted relatively to each other.

19.- In a sole pressing machine, the combination of a pad for supporting a shoe and a sole with a heel attached to the sole, means for pressing the sole and shoe against said pad, an auxiliary pad resting on the supporting pad and having an upper surface adapted to engage the shank portion'of the sole and a rear surface adapted to engage the breast of the heel on the sole, a gage movable lengthwise of the supporting pad for engaging the back of the heel on the sole, another gage carried by the heel gage for determining the lengthwise position of the shoe relatively to the sole and heel, spring pressed means for automatically maintaining said gages in the length- .wise positions into which they are moved, and

means for relatively adjusting thegages lengthwise of the supporting pad.

20. In a sole pressing machine, the combination of a pad for supporting a shoe and a sole with a heelattached thereto, means for pressing the shoe and sole against the pad, a resilient auxiliary pad resting on said supporting pad and movable relatively thereto, said auxiliary pad having an upper surface adapted to engage the shank portion only of the sole and a rear upstanding surface adapted to engage the breast of the heel, spring means tending constantly to move the auxiliary pad toward the heel end of the supporting pad, means connected to said auxiliary pad for engaging the tread surface of the heel, the connection between said means and the auxiliary pad permitting pivotal movement of said auxiliary pad laterally of the supporting pad, a gage movable lengthwise of the supporting pad and arranged to engage the back of the heel,

another gage carried by the heel gage for determining the lengthwise position of the shoe relatively to the sole and heel, and a plurality of. gages at the forepart of the supporting pad for' relatively positioning the foreparts of the sole and shoe.

'21. In a sole pressing machine, the combination of a pad for supportinga shoe and a sole with a heel attachedthereto, means for pressing the shoe and sole against the pad, an auxiliary pad resting on said supportingpad and movable relatively thereto, said auxiliary pad having an upper surface adapted to engage the shank por- I tic-nonly of the sole and a rear upstanding surface adapted to engage the breast of the heel,

' a spring tending constantly to move the auxiliary padtoward the heel end of the supporting pad, means connected to said auxiliary pad for engaging the tread surface of the heel,thev connection between said means and the auxiliary pad permitting pivotal movement of said auxiliary padlaterally of the supporting pad, a gage mov-' able lengthwise of the supporting pad and arranged to engage the back of the heel, another gage for determining the lengthwise position of the shoe relatively to the sole and heel, and a plurality of gages for relatively positioning the shoe and the'sole and heel laterally of the supporting pad.

22. In a sole pressing machine, the combination of a pad for supporting a shoe and a sole with a heel attached thereto, an auxiliary pad resting on said supporting pad and movable relatively thereto, said auxiliary pad being arranged to engage the shank portion only of the shoe, a member connected to said auxiliarypad for engaging the tread surface of the heel on the sole spring means tending constantly to urge the auxiliary pad and said member toward the heel end of the supporting pad, and means for preventing movement of said member laterally of the supporting pad but permitting lengthwise and heightwise movement of said member relativelyto said supporting pad. I

23. In a sole pressing machine, the combina-' tion of a pad box, a pad in the box having a surface thereon for supporting a shoe and a sole with a heel attached thereto, said surface being deformable heightwise of the pad box under pressure, an auxiliary pad resting on said deformable surface and movable relatively thereto,said auxiliary pad having an upper surface adapted to engage the shank portion only of the sole and an upstanding surface adapted to engage the breast of the heel, a fiat member connected to said auxiliary pad and arranged to engage the entire tread surface of the heel, and a spring tending constantly to urge said auxiliary pad and said flat member toward the heel end of the supporting pad, said fiat member being prevented by the pad box from movement laterally of the supporting pad, thereby permitting only lengthwise bodily movement of the auxiliary pad relatively to said supporting pad, both the auxiliary pad and said member being movable heightwise of the pad box with the supporting pad.

SIDNEY J. FINN.

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