US466655A - Brake-shoe - Google Patents

Description

(No Model.)

D. N. COOK. BRAKE SHOE.

Pafented Jan. 5, 1892.

WIT

UNITED STATES PATENT OFFICE.

DAVID N. COOK, OF SALEM, MASSACHUSETTS.

BRAKE-SHOE.

SPECIFICATION forming part of Letters Patent No. 466,655, dated January 5, 1892.

Application filed March 28, 1891.

T0 aZZ whom it may concern.-

Be it known that I, DAVID N. COOK, a citizen of the United States, and a resident of Salem, in the county of Essex and State of Massachusetts, have invented new and useful Improvements in Oar-IVheel Brakes, of which the following, taken in connection with the accompanying drawings, is a specification.

This invention relates to improvements in car-wheel brakes, and it is carried out as follows, reference being had to the accompanying drawings, wherein- Figure 1 represents a side elevation of the improved brake. Fig. 2 represents a top plan thereof. Fig. 3 represents an end View as seen from Z in Fig. 1. a similar view showing the brake-shoe removed. Fig. 5 represents an end view of the brake-shoe. Fig. 6 represents a cross-section on the line X X, shown in Fig. 3; and Fig. 7 represents a cross-section on the line Y Y, also shown in Fig. 3.

Similar letters refer to similar parts wherever they occur on the different parts of the drawings.

A is the brake-head, having a perforated car A, from which it is hung from thetruck, as usual. The said brake-head has an ear or bracket A", to which the cross-beam B is bolted, said beam being secured in its opposite end to a similar brake-head, as is common in devices of this kind.

C is the brake-shoe, which is detachaly secured to the brake-head by means of upper and lower pairs of parallel ears 0' C on said shoe going through corresponding recesses or perforations A A in thebrake-head, as shown.

DD are upper and lower fastening-bolts going through the ears 0' O and brake-head A, by means of which the latter is rigidly secured to the brake-shoe, as shown.

In practice I prefer to provide the shoe 0 with steady pins or projections O C, adapted to fit into corresponding recesses A A in the brake-head for the purpose of still further securing said shoe and head together, so as to prevent wear and rattling when in use.

C is the flange-groove on the interior curved portion by the shoe 0, adapted to receive the wheel-flange when the brake is put on. For therpurpose of obtaining a sufficient amount of stock on the brake-shoe back of the flange- Fig. 4 represents.

Serial No. 386,769. (No model.)

groove 0 I make at the rear of said shoe a bevel C adapted to fit against a corresponding bevel-surface A on the interior of the brake-head A, as shown, and by this arrangement I am able to lighten the shoe, as well as to obtain a strong, durable, and rigid connection between it and its brake-head.

For the purpose of preventing rattling of the shoe I prefer to interposc between it and the brake-head a rubber or other elastic or. yielding packing E, as shown in the drawings. Packings e 6 may also be to advantage located between the ears 0' O on the shoe 0 and the recesses A A on the brake-head, as shown in Fig. 6. For the purpose of increasing the wear-resisting property of the brake-shoe I insert in recesses in its face a series of forgedmetal plugs F F, preferably made of steel or wroughtiron, as shown in Figs. 3 and 6; and for the purpose of increasing the grip or frictional resistance of the shoe against the car-wheel I insert in recesses in the face of the said shoe a series of wooden plugs G G G, as shown in Figs. 3 and 7. I also prefer to insert in a similar manner a series of wooden plugs g g g in the grooved portion 0 of the brake-shoe, as shown in Figs. 3 and 7 By this construction, as shown and described, the shoe 0, when it becomes worn, may easily be removed and a new one put in its place on the brake-head, leaving the latter in its original condition, and I am thus able to repair the brake from time to time as it becomes worn simply by removing the detachable brake-shoc and replacing it with a new one at a very small expense as compared with the cost of an entire brake-head.

By my construction great rigidity is obtained between the head and its shoe, and shaking and rattling are prevented between said parts. The wear-resisting property of the shoe is materially increased, as is also the gripping or frictional qualities.

Having thus fully described the nature, construction, and operation of my invention, I wish to secure by Letters Patent, and claim 1. The combination, with a brake-head A, having the upper and lower recesses A of a detachable brake-shoe havingupperand lower pairs of parallel cars 0, engaging the upper and lower recesses of the brake-head, and upper and lower fastening -bolts D, passing transversely through the brake-head and the ears to rigidly attach the brake-shoe to the brake-head, substantially as described.

2. The brake-head having a beveled face combined with a detachable brake-shoe havin g a corresponding beveled back, and means for securing said parts together, substan tially as herein set forth and described.

3. The brake-head having a beveled face combined with a detachable brake-shoe and an elastic packing interposed between said beveled surfaces, substantially as and for the purpose set forth.

4. The herein-described brake-shoe, having a groove 0 arranged beside the plane surface,

which acts on the tread of the Wheel, said plane surface and groove each being provided with inserted wrought-metal and wooden plugs alternating with each other for resist- 2o name to this specification, in the presence of 25 two subscribing witnesses, on this 26th day of March, A. D. 1891.

DAVID N. COOK.

Witnesses:

ALBAN ANDREN, ALICE A. PERKINS.

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