US596305A

US596305A - Last-support

Info

Publication number: US596305A
Authority: US
Publication date: 1897-12-28
Anticipated expiration: 1914-12-28

Description

I (No Model.)

G. M. PETTENG-ILL'.

LAST SUPPURT PatenLfid pgc. 28,1897.

Ni'rno frATEs GEORGE M. PETTENGILL, OF HAVERI-IILL, MASSACHUSETTS.

LAST-8U PPO RT.

SPECIFICATION forming part of Letters Patent No. 596,305, dated December 28, 1897.

Application filed April 24, 1897. Serial No. 633,793. (No model.)

To aZZ whom it may concern:

Be it known that I, GEORGE M. PETTEN- GILL,Of l-Iaverhill, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Last'Sup ports, of which the following is a specification.

This invention has relation to a support for a last to be employed during the operation of securing a heel to the sole of a boot or shoe in the process of construction. Thelast, which is customarily formed of wood, is usually placed in the machine with the sole uppermost and with the top resting upon a rigid support, and inasmuch as the sides of the last at the heel converge quite rapidly the force of the plunger or other apparatus in securing the heel upon the insole frequently causes the crushing and breaking of the last and destroys its usefulness. ject of this invention is to provide a support for a last to be employed during the operation of securing the heel to the insole which shall operate to distribute the blow against the sides as well as against the top of the last, so as to prevent the last from being crushed or broken.

To this end the invention consists of a support providedwith certain features of construction and relative arrangement of parts, all as I have illustrated upon the drawings and shall now proceed to describe in detail and then point out in the claims hereto appended.

Reference is to be had to the accompanying drawings, and to the letters marked thereon, forming a part of this specification, the same letters designating the same parts or features, as the case may be, wherever they occur.

Of the drawings, Figure 1 represents in side elevation a support embodying my invention. Fig. 2 represents a rear end elevation of the same. Fig. 3 represents a vertical cross-section on the line 3 3 of Fig. 1. Fig. 4 represents a front end elevation of the support with the last removed. Fig. 5 represents a partial longitudinal section through the main body of the support. Fig. 6 represents in detail a portion of one of the movable braces of the support. Fig. 7 shows in detailt-he movable braces.

It will be understood that although but one Hence the obembodiment of my invention is illustrated in the drawings I am not limited to the details of construction thereof, as theinvention may be embodied in many other forms.

Referring to the drawings, a represents a supporting-standard upon which the support may be placed. It is formed with an upwardly-projectingpin a to extend into an aperture b in the body I) of the support. The body is constructed with two upwardly-proj ecting ears 11 b between which are mounted two oppositely-acting clamps or jaws c d, having intermeshing teeth 0' d, as shown in Figs. 3 and 7. Pintles b b are passed through the ears I) b and provide fulcrums or pivots for the said jaws or clamps, which latter are provided with opposing recesses c d and with curved shoulders 0 d to receive a movable rest 6, as shown in Figs. 3 and 5. The rest is in the nature of a small plate with-its upper surface curved to fit the top A of-the last 13, and it is placed in slots b of the ears or lugs b to permit of its being moved vertically. A pin 6 projects therefrom into an aperture 19 in one of the ears b to prevent its being moved horizontally. The said plate e rests loosely upon the projection c d of the clamps c and d, as shown in Fig. 3, so that by exerting pressure upon the rest 6 the clamps are drawn inward simultaneously, as will be readily understood.

An adjustable screw g, threaded into a projection Won the body I) of the support, serves as a stop to prevent too great outward movement of the clamps, one of the latter having a projection 0 which strikes against the screw. The opposing faces of the stops are provided with rubber pads or yielding cushions h to prevent the jaws from mar-ring or otherwise injuring the last. These pads or cushions may be formed of any suitable material and may be secured to the jaws in any desirable way. In that embodiment of my invention as illustrated upon the drawings the pads or cushions h h are cemented or otherwise rigidly secured to leather backs h, to each of which is attached a metallic strip or tongue 77?, fitted in a dovetailed groove in one of the jaws.

in place, as shown in Figs. 3 and 6.

Each tongue or strip is.

ions or pads may be removed and others inserted in their stead.

The body of the support is provided with apertures to receive two parallel bars t' 2', secured at their forward ends to a bracket j. Passing vertically through the bracket 7' is the screw-bar it of a rest It for the toe end of the last. The upper end of the rest is shaped as shown in Fig. etthat is, it is curved in ac cordance with the curve of the top of the last near the toeand it is provided with a pad k of felt, rubber, or other suitable material. Between the two arms j j of the bracket j is placed the adjusting-nut 75, through which the screw-bar passes, and by rotating it in either direction the rest will be correspondingly raised or lowered, as will be readily understood. The screw-bar is held from rotating bya screw 70', passing through the arm j of the bracketj and extending into a groove in the said bar.

The bars t" may be slid freely through the apertures in the body of the support and after being adjusted may be seen red rigidly in place by the set-screw i.

In operation the last is placed upon the support, as shown in Fig. 1, with the upper part of the toe resting upon the pad 70 of the rest and with the top A of the last bearing upon the plate 6. Then when the plunger of the heeling-machine descends to secure the heel to the insole the pressure upon the last forces down the plate 6, causing the jaws to press inwardly against the sides of the last with a pressure corresponding to the blow or pres sure of the plunger. Thus it will be seen that the blow of the plunger will be distributed equally on the sides as well as the top of the last and will operate to prevent the last from being crushed or split or otherwise injured in any other way.

My improved support is adapted for all sizes and shapes of lasts, as the jaws automatically adapt themselves to the last being operated upon and as the rest may be adjusted both longitudinally of the last and transversely thereto.

I claim-- 1. As a means for supportinga last during a heeling operation, a support adapted to receive the top of the last, and provided with means for transmitting and distributing the blow to the sides of the last.

2. A support for a last during a heeling operation, provided with movable yielding means for transmitting and distributing the blow to the sides and top of the last.

3. As a means for supporting a last during a heclin g operation, a support provided with movable jaws actuated by the last, said jaws being arranged to press against the sides of the last in proportion to the force of the blow upon the last.

4. As a means for supporting a last during a heelin g operation, a support provided with oppositely-movable jaws adapted to clamp the sides of the last, and means upon which the last rests for operating said jaws.

5. As a means for supporting a last during a heeling operation, a support provided with pivoted jaws actuated positively by the last and arranged to clamp the sides of the last, when the latter is under pressure, said jaws being connected together to operate simultaneously.

6. As a means for supporting a last during a heeling operation, a support provided with jaws moved positively toward each other by the last, to engage the sides of said last, said jaws being faced with yielding pads or cushions.

7. As a means for supporting a last during a heeling operation, a support provided with oppositely-movable jaws operated by the last to clamp the sides of the last by a pressure on the last transverse to the line of move ment of the clamping parts, and means for limiting the outward movement of the said jaws.

8. As a means for supporting a last during a heeling operation, a support provided with movable jaws pivoted to swing toward and from each other to clamp the sides of the last, and having inwardly-projecting portions to receive the last, the construction and arrangement being such that the pressure of the last against the inwardly-projecting portions will cause the jaws to clamp the sides of: the last.

9. As a means for supporting a last during a heeling operation, a support provided with movable jaws pivoted to swing toward and from each other to clamp the sides of the last, and having inwardly-projectin g portions and a plate resting upon said inwardly-projectin g portions to receive the top of the last.

10. As a means for supporting a last during a heeling operation, a support having jaws operated positively and automatically by the last to clamp the sides of the last, and an adjustable rest for the toe end of the last.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 12th day of April, A. D. 1897.

GEORGE M. PETTENGILL.

Witnesses:

JOHN BROOKS, OSCAR M. MEADER.