US250977A

US250977A - Horseshoe

Info

Publication number: US250977A
Authority: US
Publication date: 1881-12-13
Anticipated expiration: 1898-12-13

Description

(No Model.)

F. T. ROBINSON;

HORSESHOE.

No.'250.,97,7. Patented Dec. 13,1881.

INVBNTOR WITNESSES:

Jzyww/w BY JMWM f6 ATTORNEYS.

UNITED STATES PATENT OFFICE.

FRANCIS T. ROBINSON, OF LAURAVILLE, MARYLAND.

HO RSESHOE.

SPECIFICATION forming part of Letters Patent No. 250,977, dated December 13, 1881.

Application filed September 2, 1881.

.To all whom it may concern Be it known that I, FRANCIS T. ROBINSON, of Lauraville, in the county of Baltimore and State of Maryland, have invented a new and useful Improvement in Horseshoes, of which the followingis a full, clear, and exact specification.

The object of my invention is to provide removable calks for horseshocs which can readily be applied as required.

Theinvention consists in calks having wedgeform recesses, combined with shoes formed with permanent in gs of wedge form, that sustain the calks, as hereinafter described and claimed.

In the accompanying drawings, Figure l is a persprctive view of a horseshoe fitted with the removable calks. Fig. 2 is a sectional side view of the same. Figs. 3 and 4 are perspective views of the calks detached.

Similar letters of reference indicate corresponding parts.

The shoe A is formed at its toe and heels with lugs a, of wedge form.

The calks B are formed with wedge-form recesses b, that fit snugly on the lugs a, and a cross-pin, a, passing through the calks B and logs a, retains the calks in place.

The calks B may be smooth or sharp. Fig.

(No model.)

3 shows a smooth calk, and Fig. 4a sharp one. Either form is to be used according to the condition of roads, as will be understood, and it is evident that a change can be made in a molnent.

This form of calks has strength where it is required, and there are no weak portions liable to become broken. Use tends to tighten the calks on the shoes, and there beingno wear on the lugs a, only the calks need to be renewed from time'to time.

The calks can be formed of steel or chilled iron, and will then last much longer.

I am aware that it is not new to secure a calk to a shoe by a pin or wedge in conjunction with a tongue and groove, or bya flange and tenon on calk and corresponding mortises in the shoe, or by making the calk in two parts and clamping them on a T-lug of shoe; but

What I do claim as new is The combination, with the wedge a on shoe, of a calk, B, having a corresponding recess to receive it, whereby the calk will not work loose, but become tighter as it is worn, as described.

FRANCIS THOMAS ROBINSON.

Witnesses:

J ULIUs W. KNOX, FRANCIS S. ERDMAN.