US2180438A - Heel-pressure mechanism - Google Patents

Description

Nov. 21, 1939, J, F. STANDISH HEEL-PRESSURE MECHANISM Filed Sept. 30, 1937 I Patented Nov. 21, 1939 Nar -star A-TsNr orrics HEEL-PRESSURE MECHANISM John F. Standish, .Winthrop, Mass, assignor to United Shoe Machinery Corporation, Borough of Flemington, N. J., a corporation of New.

' Jersey I Application September 30, 1937, semi No. 166,618

11 Claims.

mechanism for this purpose is foundin Letters Patent of the United States No. 1,269,654,Standish, June 18, 1918. Such an organization equalizes the pressure between the two members, the clamping force applied by each to the heel being the same. This relation, however, may not give, the best results under all conditions. For example, when a high slender heel is being operated upon, and especially when its covering is of such material as Celluloid, the application of the same pressure to the tread-surface as to the rear tends to produce permanent distortion of the covering. Further, the heel may be crushed at theneck. On the other hand, allthe pressure which the heel will bear should be applied to-the tread to resist the displacing effect created by the driving of the nails. An object of this invention is to impress upon the heels being operated upon, forces which are correctly proportioned forthe work in hand.

To achieve this end, I combine with movable members, as those for contact with the tread and lateral surfaces of a heeLmeans for connecting the members to transmit the movement of one to the other and means, which is preferably included in the connecting means, arranged to vary the forces exerted upon the heel by the respective members. The connecting'means'is herein shown as in the form of a lever, and by providing this lever with a fulcrum variable in position, the ratio between the lever-arms and, consequently, the forces applied by the members may be altered as desired. In the form of my invention herein disclosed, the pressure-head of a heel-attaching machine is shown as having two slides movable upon it and carrying the heel-abutments, there being a lever pivotally connected to the slides and a fulcrum-projection movable upon the head along the lever, as by a rack variable in position upon the head, together with means for securing the rack and its fulcrum-projection in differen positions.

In the embodiment of the invention appearing in the drawing:

Fig. l is a side elevation, with parts broken away, of the pressure mechanism in association with the jack of a heel-attaching machine, said i jack being in vertical section;

Fig. 2 is' a vertical section through a portion of the pressure-head, taken just inside one of "the cover-plates; a

Fig 33, a broken top plan View of the elements more closely identified with this invention, and- Fig. 4 a broken front elevation thereof.

Witha jack J, containing a reciprocatory: I driver+assembly D, co-operates a verticallymovable pressure-head P, in whicha carrier-portion i is horizontally adjustable by a screw 12. Movable in vertical ways M in the carrier is a tread- -slide 16 and a rear slide I8, these having, re-

spectively adjustable upon them many appropriate manner, a plate 20 and a fork 22 providing abutments for respective engagement with the tread and rear lateral surfaces of a heel. The

two slides are joined by a haven-which, to better distribute the stresses, is shown as made up of two laterally spaced sections 24, 24 movable upon opposite sides of the carrier l0 beneath coverplates 25, 25. To the tread-slide I is, the lever may be pivotally connected by a pin 26 at either of two vertically spaced openings 28 and 3ii,'dependingupon the height of the heel to be operated upon. The opposite extremity of the lever is joined to the rear slide I8 by a link 32. At the outer side of each lever-section are ways 3.4, 34 formed between upper and lower walls ofa' lon-- gitudinal recess 36. Along these ways in each section a block 38 is movable, this block furnishing a bearing for a stud ill projecting from a slide 42 guided in horizontal ways 44 in the corresponding cover-plate 25. On the. upper edge of each slide 42 is a rack 46, pinion 48 formed upon a shaft 56]. The'shaft is common to the two pinions and is journaled in' the side-plates 25. By turning the shaft to difierent angular positions by a rod or spanner applied to an opening or openings 52, the fulcrum-slides @2 may be moved upon their ways in the carrier, similarly shifting the fulcrum-projections and their bearing-blocks 38 along the ways 34 in the lever. The entire adjusting organization may be locked in the chosen position by an arm 54 depending from a spindle 56 extending between the side-plates 25 and provided with a divided portion 58 surrounding the shaft. A screw til may be employed to clamp the divided portion of the arm upon the shaft, thus pinions against rotation.

Similar in effect to the pressure mechanism of the previously mentioned patent, the rear slide retaining it and its l 8 is held normally elevated against an adjustable with which meshes a stop 6|, with the forward slide l6 depressed, by a spring 62 uniting the rear slide to the carrier 10. As a result of this, by the lowering of the pressure-head P in the operation of the heel-attaching machine, the abutment-plate 20 first contacts with the tread-surface of a heel H, which has been positioned upon the heel-seat of a shoe S supported upon the jack J, and the connecting lever 24; communicates this motion to the rear slide [8 to lower it. This continues until the fork 22 seats itself upon the sides of the heel. At that time, if the fulcrum-stud is equidistant from the two slides, this adjustment beingheld by the clamping arm 5%, equal forces will be "applied to the tread and to the periphery of the heel. If the conditions are such that more pressure is desired upon the rear of the heel than upon the tread, the operator releases the clamp, and *by rotating the shaft as shifts the rackslides 4 2 rearwardly, or to the right as viewed in Figs. 1 and 2, and again locks the shaft. With this location of the fulcrum studs, the slide It acts upon a lever-arm longer than that to which the slide 18 is joined, and the rear fork 22 applies an excess of pressure over that of the tread-plate 2|]. Adjustment of the fulcrum-studs to the left of the central position produces the opposite effect. It will therefore be seen that the two heel-clamping forces may be varied between-quite widely different limits to create the best conditions for the type of heel being operated upon, to resist the displacing force caused by driving nails N from within the jack J through the heelseat of the shoe S into the heel I-I.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. Heel-pressure mechanism comprising movable members for contact with the tread and lateral surfaces of a heel, means for connecting the members to transmit the movement of one to 'the other, and means arranged to vary the force exerted upon the heel by the respective members.

2. Heel-pressure mechanism comprising movable members for contact with the tread and lateral'surfacesof a heeL 'means for connecting the membersto transmit the movementof one to the other, and means included in the'connecting meansand arranged to vary the force exerted upon the heel by the respective members.

'3. Heck-pressure "mechanism comprising a pressure-head, two 'slides'movablein the head and carrying heel-abutments, a lever fulcrumed upon thehead and connecting the slides-and means arranged to vary the ratio between-the lever-arms.

4. Heel-pressure mechanism comprising a pressure-head, two' slides movable in the head and carrying heel-abutments, a lever connecting the slides, and a fulcrum for the lever variable in position upon the head.

5. Heel-pressure mechanism comprising a pressure-head, heel-pressure members movable upon the head, a lever connecting the members and having a movable fulcrum, and means arranged to vary the position of the fulcrum.

6. Heel-pressure mechanism comprising a pressure-head, two slides movable in the head and carrying heel-abutments, a lever pivotally connected to each slide, a fulcrum-projection movable along the lever, and means arranged to secure the projection in different positions upon the head.

7. Heel-pressure mechanism comprising a pressure-head, two slides movable in the head and'carrying heel-abutments, a lever pivotally connected to each slide, a rack movable upon the head and having a projection, and a block movable upon the lever and engaged by the projection.

8. In a heel attaching machine, a pressurehead, two slides movable-in the head and carrying heel-abutments, a lever pivotally connected to each slide, a rack movable upon the head and having a projection about which the lever is fulcrumed, a rotatable'pinion meshing with the rack, and means arranged to secure the pinion in different angular positions.

9. In a heel-attaching machine, a pressurehead, two slides movable in the head and carry ing heel-abutments, a lever pivotally connected to each slide and provided with ways, a block movable in the ways, and *a projection movable upon the head and upon which the block may turn.

10. In a heel-attaching machine, a pressurehead, two slidesmovable in the head and carrying heel-abutments, a lever fulcrumed upon the head and having laterally spaced sections connecting the slides, each section being provided with ways, a block movable in the ways of each lever-section, and racksmovable upon the'head at opposite sides of the lever and'having studs upon which the blocks may turn. v

11. In a heel-attaching machine, apressurehead, two slides movable in the head and carrying heel-abutments, a lever fulcrumed upon the head and having laterally spaced sections connecting the slides,-each section being provided with ways, a block movable in the ways of each lever-section, racks movable upon the head at opposite sides 'ofthe leverand having studsupon which the blocks may turn, a shaft rotatable upon the head, pinions fast upon the shaft and meshing'with the racksyand means arranged to fix the shaft' against rotation.

JOHN F. 'STANDISH.

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