US362371A

US362371A - Solomon b

Info

Publication number: US362371A
Authority: US
Publication date: 1887-05-03
Anticipated expiration: 1904-05-03

Description

.(No Model.)

' S. B. ELLITHORP.

CLAMP FOR LASTING MACHINES. No. 362,371. Patented May 3, 1887.

- 7 UNITED STATES PATENT (Prion.

SOLOMON B. ELLITHORP, OF BUFFALO, NEW YORK.

CLAMP FOR LASTING-MACHINEOS.

SPECIFICATION forming part of Letters Patent No. 362,371, dated May 3,1887.

Application filed October 14, 1886.

To all whom it may concern:

Be 1t known that I, SoLoMoN B. ELLITHORP, a 011312611 of the United States, residing at Buffalo, 1n the county of Erie and State of New York, have invented a new and useful Improvement in Clamps for Lasting-Machines, of which the following is a specification.

My lnvention relates to an improvementin clamps for Iastingmachines; and it consists in the peculiar construction and combination of devices that will be more fully set forth herelnafter, and particularly pointed out in the claims.

This invention is particularly designed for use in a lasting-machine such as described in the Letters Patent of the United States No. 236,218, granted to me January 4, 1881, and No. 247,625, granted to me September 27, 1881, and also described in my pending applications for Letters Patent of the United States, filed July 14, 1886, and bearing the Serial Nos. 208,873 and 209,036; and the object of my present improvement is to provide a clamp which 1s adapted to firmly clasp the edge of the leather without in any way marring or injur- 1ng the leather. This object I accomplish by the construction hereinafter described, and illustrated in the accompanying drawings, in

Figure 1 is a perspective view of a clamp embodylng my improvements, suspended from the templet of a lasting-machine. Fig. 2 is a vertical section of the clamp; Fig. Sis a transin my Letters Patent and in my applications for Letters Patent before mentioned.

0 represents a clamp, which comprises the rigid jaw D, the j aw-E, which is pivoted thereto, and the cam-lever F, which is pivoted in the upper arm of the jawE, and is adapted to bear against the opposing side of the upper arm of the rigid jaw, so as to close the said rigid and pivoted jaws together and cause them to grasp Serial No. 216,256. (No model.)

the upper edge of the leather which forms the upper of the shoe. That side of the cam which bears against the upper arm of the rigid jaw when the leather is clamped is flattened, as at F, to prevent the clamplever from turning, and thus releasing the leather while the shoe is being lasted.

Heretofore, in order to cause the clampingjaws to firmly engage the edge of the leather, so that the latter will not slip while being lasted, the said clamping-jaws have been provided on their opposing sides with transverse teeth or corrugations, which bite into the leather. This construction is disadvantageous, for the reason that the teeth or corrugations mar the leather and cut into it, and thus weaken it at the point where it is engaged by the clamp to such an extent that after the upper is secured to the sole the upper, after the shoe has been worn for a short time, breaks away from the sole.

I provide the opposing faces of the clamping-jaws with circular cavities or recesses a. When the jaws are clamped onto the leather, it is compressed between the faces of the clamping-jaws, and those portions of the leather which coincide with the cavities or recesses a are forced into the same, thereby enabling the clamping-jaws to obtain an exceedingly strong grip on the leather without marring or injuring it in the slightest degree.

Between the opposing sides or faces of the clamping-jaws, and near the upper endsthereof, is secured an eXtensile coiled spring, G, the ends of which are seated in countersunk openings or recesses E, that align with each other and are made in the inner sides of the clamping-jaws. The function of the said spring is to open the clamping-jaws as soon as the cam-lever is turned upwardly, and thus cause the clamping-jaws to instantly release their grasp of the leather.

In the upper ends of the upper arm of the rigid jaw is made an elongated opening, I, with which the hook B engages.

Heretofore some difficulty has been experienced in causing the clamps to grasp the edges of the leather when the upper has been out without allowing enough of the edge to project beyond the bottom of the last to enable the clamping-jaws to grasp it. This difficulty is overcome by providing an elongated opening, I, in the upper end of the clamp. \Vhen the teuiplet is lowered to its fullest extent, the clamp, which is suspended therefrom by the hook B, is enabled to be moved independently of the templet a distance corresponding to the length of the opening I, thereby enabling the clamp to be manipulated and worked over the edge of the leather, so as to obtain a grasp thereon.

I am aware that the jaws of garinent-elasps have been provided with corrugated faces; but in this construction teeth or sharp biting-edges are necessarily provided on the walls of the corrugations. The walls or opposing faces of the jaws are not made flat, as in my clamp, so that when the cup shaped recesses are made in the flat faces there will be no sharp edges to mar, scratch, or otherwiseinjure the leather.

Having thus described my invention, I claiin 1. A clamp for lasting-machines, having its jaws made flat on their opposing faces, which flat opposing faces are formed with a series of cup-shaped recesses or cavities, as set forth.

2. In aelamp for lasting-machines, the pivotedjaws having the flat opposing faces, which faces are provided with cavities a, a cam to close the jaws, and the spring to open the same when the cam is released, as set forth.

3. In a clamp for lasting-machines, the combination of the pivoted jaws having the recesses or cavities a on their opposing sides, and the extended arms, the cam pivoted to one arm and adapted to bear against the other to close the jaws, and the spring to open the jaws when the cam is released, substantially as described.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in 40 presence of two witnesses.

SOLOMON B. ELLITHORP.

Witnesses:

7M. N. MOORE, JOHN H. SIGGERS.