US1486192A - Shoe last - Google Patents

Description

C. K. MaCDONALD Masch H 1924.

Y Filed April 5, 1922 nml Patented Mar, li, lt.

CLIFFORD KIR-BY IIAGDONALD, GF BROCKTON, MASSACHUSETTS.

SHGE LAST.

Application led April 3,

.To @ZZ whom t may concern.'

Be it known that I, CLIFFORD KIRBY ltLicDoNALD, a citizen of the United States, and resident of Brockton, 'Plymouth County, State of Massachusetts, have invented certain new and useful Improvements in Shoe Lasts, of which the following is a specification.

IThis invention relates to shoe lasts adapted to be used in the manufacture of shoes, and has particular' reference to that class of lasts, in which the toe part is hingedly connected to the heel portion, so that the two sections may be moved with respect to each other in order that the last as a whole may be easily inserted into or withdrawn from a shoe.

in important object of the invention is to generally improve the various elements entering into the last embodying my invention, the improvements being directed particularly to the hinge mechanism by which the toe and heel sections are connected together, with a view of reducing the cost of production of the last and facilitating the assembly of the several component parts thereof.

@ther objects and certain advantages of the invention will become apparent from the following description, taken in connection with the accompanying drawings, in which:

Figure 1 is a fragmental sectional view o`f a last embodying my invention, the last sections being shown as extended.

Figure 2 is a view similar to that of Figure 1, the last sections being shown as collapsed.

Figure 3 is longitudinal sectional view taken on the lines 3-3 of Figure 1.

In the drawings wherein is shown what l at present consider the preferred form of my invention, the numeral 5 indicates a heel portion, which is at its forward end tapered downwardly and rearwardly, and provided with an upwardly extending opening 6, into which is fitted a metallic bushing 7, the

' metallic bushing 7 being adapted to receive a suitable supporting element such as is ordinarily used for supporting lasts of this type. The heel portion 5 is also provided with a longitudinally extending bore or passage 8, into which is fitted a sleeve 9, adapted to receive an elongated shank 10, which at its forward end, carries an angularly disposed arm 11, having an opening 12 formed therein. The shank 10 is re- 1922. Serial No. 548,932.

tained in position within the sleeve 9 by means of a transversely disposed pin 13, which is passed through the heel section 5, as most clearly shown in Figure 3.

The shank 10 and the angularly disposed arm 11 together form a hinged member, to which is pivotally connected a second hinge member 14. The latter named hinge member 14; comprises a pair of sections 15, which terminate at their rear ends in locking plates 1G having more or less inherent resiliency. The hinge section 14 is pivctally connected to the shank 10 by means of a transversely disposed rivet 17, which is passed through the plates 16 ,and shank 10, which is disposed intermediate the plates 16.

The shanks 15 are arranged within a sleeve 18 which is carried within a recess 19, formed in the toe portion 20. As a means for retaining the Shanks 15 within the sleeve 13, there is provided a transversely disposed pin 21, which is passed through the sleeve 18, the shanks 15 and the toe part 2O of the last.

From the above description, it is apparent that the heel portion 5 and the toe portion 2O of the last are so connected that one of these sections may be hingedly moved with respect to the other, from the position shown in Figure 1 to that of Figure 2. While the sections 5 and 20 are extended, it is desirable to so lock them in their respective postions that they may be retained extended while the last is being operated upon, as in the manufacture of shoes. To edectively retain these sections in their extended positions l provide a locking ball 22, which is fitted into the opening 12 formed in the angularly disposed arm 11 and adapted to partially enter a registered opening 23, formed in one of the plates 16, as most clearly shown in Figure 3. By reason of the inherent resiliency of the plates 16 and their intimate relation with respect to the ball 22, it is evident that the heel section 5 and the toe portion 20 of the last may be more or less rigidly locked in their respective extended positions when the ball 22 is seated within the opening 23, as shown in Figure 3.

lt is also desirable to temporarily lock the sections 5 and 2O in their respective collapsed positions when the last is broken, to'

shaped slot 24, into Which the ball 22 is adapted to partially enter when the section 2O is so moved With respect to the heel section 5 as to cause the ball 22 to dislodge itself from its seated position Within the opening 23. It may be remarked thatas the ball 22 nieves from the opening 23, the plates 16, by reason of their resiliency, are permitted to separate a suflicient distance to allow the ball 22 to travel from its position shown in Figure 3 to that shoWnin Figure 2.

From a study of the foregoing description, taken in connection with the accompanying drawings, it is apparent that a last constructed in accordance With my invention embodies certain desirable features Which tend to lend rigidity to the structure as a mits the device, as a Whole, to be easily assembled and eliminates, to a degree, a certain amount of accuracy and precision Which has heretofore been necessary in the manufacture of similar lasts, in order that the finished articles might properly function under the various conditions of use to which they are subjected.

Having thus described my invention, I claim:

In a shoe last, a heel section having an opening formed therein, a toe section having an opening formed therein, a sleeve arranged Witliin the opening of said heel section, a sleeve arranged Within the opening of said toe section, a shank secured Within the sleeve of said heel section, an arm carried by said shank, a second shank secured Within the sleeve of said toe section, thc latter named shank being provided With resilient plates having openings formed therein, and a locking ball carried by said arm, said locking ball being adapted to enter the openings of said resilient plates to retain said heel and toe sections in either extended e or collapsed positions.

In testimony whereof, I have affixed my signature to this specification.

CLIFFORD KIRBY MACDONALD.

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