US762484A - Brake-shoe. - Google Patents

Description

No. 762,484. PATENTED JUNE 14, 1904.

J. N'. MAXWELL.

BRAKE SHOE.

APPLLOATION rmzn JAN. 29. 1904. no 10mm.

UNITED STATES Patented June 14, 1904.

JAMES N. MAXWELL, OF DAWSON, PENNSYLVANIA.

BRAKE-SHOE.

SPECIFICATION forming part of Letters Patent No. 762,484, dated June 14, 1904.

Application filed January 29, 1904. Serial No. 191,144. (No model.) v

To aZZ whom it may concern:

Be it known that I, JAMEs N. MAXWELL, a citizen of the United States, residing at Dawson, in the county of Fayette and State of Pennsylvania, have invented certain new and useful Improvements in Brake-Shoes,of which the following is a specification.

My invention relates to a new and useful improvement in brake-shoes, of which the following is a description, reference being had to the accompanying drawings, forming a part of this specification.

The object of my invention is a car-wheel brake-shoe having alternate hard and soft friction-surfaces, thus made so as to prolong the life or usefulness of the shoe.

In the accompanying drawings, Figure 1 is an illustration of a brake-shoe having my improvement shown in perspective. Fig. 2 is a face view of the same. Fig. 3 is a' portion of a brake-shoe having my improvement shownin perspective and in sectional view as a modified form. Fig. 4 is another modified-form of the hard segment used in my brake-shoe, showing fastening-holes for the metal to run into in the molding process; and Fig. 5 is another modification of the segments or hard friction portions used in the shoe when being molded.

The shoe will be molded with my added portions 2, thus forming the surfaces 3 integral with the body portion 1. These will be the soft friction-surfaces that come in contact with the wheel, while the segments 2 or hard friction-surfaces, also coming in contact with the wheel, are longer lived by reason of their hardness, being made of steel or iron. As to the proportion of the friction-surfaces divided between the hard and soft materials I consider they should be about equal.

The modification of the hard friction-segment shown in Fig. 3 has a cut-out portion 2, which maybe the full length of the segment, or it may be cut up into short parts, as

desired. This idea also applies to the segments shown in Figs. 4 and 5, where I show the reamed-out openings 5 in the segment 4 and the oblong cut-out 7 in the segment 6.

By actual experience I have found that carbrake shoes made with alternating hard and soft friction-surfaces, substantially as described, are much longer livedI will say fully a third longer-than when the friction surface is all of the usual soft material.

Having thus fully shown and described my invention, what I claim, and desire to secure by Letters Patent, is-

In a brake-shoe, the combination with a g body portion having a concave inner face, of

apertured attaching members formed integral with its outer face, said body portion being provided with a series of recesses in its inner face, outwardly-flaring tapered projections formed integral with the body portion and being centrally disposed within the recesses W. H. CocHRAN, VVn. MoDoNALD

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