US952553A - Brake head and shoe. - Google Patents

Description

G. H. WILLIAMS, JR. BRAKE HEAD AND SHOE.

APPLICATION FILED JUNE 3, 1909.

952,553 Patented Mar. 22, 1910.

ANDREW a GRAHAM 60., PHDTD-LITNQGRAPHERS, WASHINGTON. 01

UNITED gTATE PATENT CHARLES H. WILLIAMS, JR., OF CHICAGO, ILLINOIS, ASSIGNOR TO CHICAGO RAILWAY EQUIPMENT COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION.

BRAKE HEAD AND SHOE.

To all whom it may concern:

Be it known that I, CHARLES H. WVILLIAMs, J12, a citizen of the United States, residing at Chicago, Illinois, have invented a certain new and useful Improvement in Brake Heads and Shoes, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is a side elevational view of my improved brake head. Fig. 2 is a front elevational view of the head.

This invention relates to a new and useful improvement in brake heads and shoes, the object being to overcome the faults of the Christie head with respect to the fit between the head and the shoe.

I11 my present device, there is no shoe key to back out and fall, as heretofore, and, furthermore, in my present construction, the shoe cannot twist sidewise, as is possible in the Christie type.

In the accompanying drawings, I have shown a brake head and shoe, in which the parts are secured together by a tapered clovetail interlock, which tends to bind the shoe tightly to its seat and dispenses with the various lugs and fittings necessary in the Christie type of head. Furthermore, by my improved construction, it is possible to remove the brake shoe longitudinally of the beam, or in a direction parallel to the axis of the beam which is of some importance in inserting new shoes in certain types of trucks. By dispensing with interlocking lugs between the head and shoe, as in the Christie type, I avoid all danger of the lugs on the head becoming worn away in the event that the shoe is unevenly worn.

In the drawings, 1 indicates the brake head, which may be mounted upon any kind of beam. This brake head is provided with the usual hanger openings 2 and 3. The shoe seat, constituting the front face of the head, is devoid of locking lugs and key re- Specification of Letters Patent.

Application filed June 3, 1909.

Patented Mar. 22, 1910. Serial No. 499,914.

cesses, as in the Christie type of head, said shoe seat being preferably plain, as shown in Fig. 2. There is, however, a longitudinally disposed, tapered recess 4 which may communicate with the hanger opening 3, said recess having overhanging, interlocking portions 4 to cooperate with the tapered, dovetailed key 5 of the brake shoe 6. This wedge-shaped key 5 on the back of the brake shoe may slip longitudinally into the recess 4, the flat shoe seat permitting such movement, and when in position a cotter pin 7 is passed through openings in lugs or ears 8 extending from the brake head, said cotter pin being located behind the wedge key 5 to prevent the displacement of the brake shoe. If desired, ribs 6 may be added to the back of the shoe at its ends to reinforce the overhanging ends of the shoe; or, if desired, the shoe seat on the brake head can be extended to provide a more extensive bearing surface and backing support for the shoe.

From the above, it will be seen that the objections, incident to the use of the Christie head heretofore pointed out, are obviated by my improved construction.

I am aware that minor changes in the construction, combination and arrangement of the several parts of my improvement can be made and substituted for those herein shown and described without in the least departing from the nature and principle of my invention.

Having thus described my invention, what I claim is:

The combination with a brake head having a dove-tail recess in its face, and a brakehanger recess communicating therewith, and

a brake-shoe having an interlocking rib fit-

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