US1715594A - Hinge last - Google Patents

Description

June 4, 1929. T 1,715,594

HINGE LAST Filed May 15, 1928 Z Fig.2 V

Patented June 4 1929.

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' HINGE LAST.

Application filed May 15,

. This invention refers to hinge lasts.

There is a considerable demand'in the trade for a hinge last which will be impositively locked in both extended and collapsed position, that is, which can be moved by pressure from one position to the other, but will not of itself tend to move from one position to the other, and at least requires a considerable pressure to move it from extended position.

All such lasts heretofore furnished to the trade have been subject to various disadvantages. Either the spring, which is a neces sary component of the impositive locking means, has been located so high in the forepart of the last thatthe thin cone or instep portion of the forepart was unduly weakened,-

or, on the other hand, the lasts in which the spring was inserted in the lower thicker por .tion of the forepart have been very complicated and expensive. I

It is an important object of the-present in vention to provide alast of the type described which shall obviate those and other disadvantages To this end I have provided a last in which the heelpart and forepart are connected by two simpleflat links lying one above the other with a spring-pressed plunger co operating with a notch or cam surface on the lower link to hold the last impositively'in either extended or collapsed position. The spring is thus located in the lower part of the last where there is room for it,'.and the link structure is cheap and strong and has'proven very eflicient in use.

This and other features of the invention will be better understood from the following description of a preferred embodiment thereof illustrated in the drawings, in which Fig. 1 shows the last in extended position, and

Fig. 2 shows the last in collapsed position. In the last illustrated the forepart 10 and heelpart 12 are separated by a cut of any convenient formation, though preferably having a substantially horizontal shoulder 14 on the forepart extending into the heelpart to aline the last parts properly and to prevent relative V twisting in use. The last parts are united by a lower link 16 anchored in the heelpart and forepart, respectively, by hinge pins 18,20, and by an upper link 22 similarly anchored by hinge pins 24, 26. These links are located I thus holdingthe last in pin 20 than 1928. Serial No. 278,005. A

above the other, so that the amount of wood removed is minimized.

The lower link 16- has a notch or cam surface 28 on its front end cooperating with a pin 30 which. is impelled rearwardly by a 7 spring 32 in a hole 34 in the forepart 10.;

tion. In the collapsing movement, which is pressure alone, the links and heelpart turn upwardly and the notch 28 rides accomplished by over'the pin 30, which comes to rest onthe end surface of the link 16 above the notch, collapsed position by by the insertion of the I friction'and, with the form of link shown, by

a slight resilient cam action, 'end'of the notch 28 is a little farther from the I the, adjacent end surface of the link 16.

The illustrated bondingimechanism comsince the upper prising thetwo flat links 16, 22 and the shoul der 14; make the last very strong in resisting twisting stresses. The amount of wood re moved to permit the insertion of the hardware is reduced to a minimum and the last is thereby weakened very little by it.

- Having thus described myinv'ention, what I claim as newand desire to secure by Letters Patent of the United States is n .1. A hinge last comprising a heelpart and a forepart'havinga substantially horizontal shoulder on its'rear face projecting into a corresponding depression in the front face of the'heelpart, the said last parts having kerfs in their meeting faces, two flat links located one directly abovethe other in the kerfs and each hingedly pinned into each last part, the

lower link being located in the lower half of the last and having a camfsurface on one of its ends, and a spring-pressed plunger located below the center i which the cam-surfaced link-end is connected and cooperating with .the' said link-end to extended positions.

2. A hinge last comprising a heelpart and ofthe lastpart to loo ""hold the last impositively'in' colla d and Cl I directly above theother in the kerfs and each hingedly pinned into each last part, .thelower link being located in the lower half of the I last'and having a cam surface on its front end, the forepart having a hole located below its central axis, and a spring-pressed plunger located in the hole and cooperating With'the 10 cam-surfaced end of the lower link vto hold the last impositively iii-collapsed and extended positions. I p In testimony whereof I have signed my name to this specification.

Y B. FIT Z.

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