US1648696A - Brake shoe - Google Patents

Description

Patented Nov. 8, 1927.

UNITED STATES PATENT OFFICE.

ALBERT NELSON, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE AMERICAN BRAKE SHOE &

FOUNDRY COMPANY, OF WILMINGTON, DELAWARE, A CORPORATION OF DELA- WARE.

BRAKE SHOE.

This invent-ion relates to railway'b'rake shoes and its object is to provide a strong and substantial anchorage of the body of the shoe to the back plate.

A further object of the invention is to 1'6- inforce and strengthen the ends of the shoe by extending the plate back close to the ends of the body and running up metal from the body to form upstanding lugs at the ends of the shoe which are anchored to the back to reinforce and strengthen the ends of the shoe.

A further object of the invention is to more securely anchor the body of the shoe to the back plate by depressing the back to permit portions of the body metal to run up and spread over the outer face of the back plate.

In the accompanying drawings I have selected a locomotive shoe for illustrating the invention and referring thereto,

Fig. 1 is a longitudinal sectional View,

Fig. 2 is a top plan view.

Figs. 3 and 4 are sectional views on the. lines 38 and 4-4 of Fig. 2.

Referring to the drawings 5 is the body, 6 is the back plate and 7 is an attaching lug, these parts being in general form and construction well known in the brake shoe art. The body may be made of cast iron with or without chilled portions or inserts. The back plate and the. lug are preferably made of steel and the plate is provided with openings 8 into which the body metal flows during the casting operation to embed the back plate in the body. The lug is engaged with the back plate and embedded in the body in any suitable manner to secure it to the body.

The ends of the plate 6 are extended closely adjacent to the ends of the body of the shoe and the plate is provided near its ends with transverse openings 9, a part or all of the metal cut out of the plate to form said openings 9 being turned outwardly to form flanges 10. The body metal flows up through the openings 9 and over the flanges 10 to provide enlarged end lugs 11 which strengthen the ends of the shoe. The ends of the body are anchored by the body metal to the cross bars 12 at the endsof the back and also to the side walls of the openings 9 and also to the flanges 10. The ends of the shoe are strengthened by this construction and the ends of the body are securely anchored to the back plate. The back plate is provided with one or more depressions 18 along one edge thereof to permit the body metal to flow up over the depressed part of the backat 14. In Fig. 2 I'have shown a depression 13 between theattaching lug 7 and each end of the shoe. This depression should not carry the depressed part of the back farther into the body of the shoe than the. lug extends, to avoid contact of the back with the wheel when the body becomes worn down. The metal 14 which flows over the depressed edge of the back plate and through the adjacent openings 8 forms a secure anchorage for the body to the back plateand does not lessen the wear service which the body will afford- My invention provides a brake shoe of strong and substantial construction in which the body is securely anchored at and between its ends to the back plate. In case of fracture of the body it is important that the fractured parts should hang to the back plate during continued service of the shoe. Therefore, it is desirable that the body should be anchored to the shoe to hold the parts which are most likely to be formed when a shoe becomes fractured. Accordingto past experience shoes are liable to fracture at or adjacent the middle thereof and also at their ends. My improved anchorage for the body to the back plate will hold the parts of the body which may be formed by fractures occurring therein at or about the middle thereof, or at their ends so that the shoe may continue in use andgive eiiicient service. This improved anchorage also prevents the fractured parts of the body from becoming dislodged. from the plate back and causing damage or injury.

I have illustrated the shoe in a commer .cial form, but I am aware that changes in anchor the ends of the body to the ends of the plate.

i 2. A brake shoe comprising a body and a plate embedded on the back thereof, said plate having its ends extended adjacent to the ends of the body and having openings therein, cross bars at the ends of the plate beyond said openings, parts of the plate cut to form said openings being bent to form outwardly projecting flanges, and parts of the body projecting over said cross bars and said flanges and extending through said openings to anchor the ends of the body to the ends of the plate.

,3. A brake shoe comprising a body and a plate embedded on the back thereof, said plate having spaced depressions at its edge to receive a part of the body for anchoring the body to the plate.

4:. A brake shoe comprising a body and a plate embedded on the back thereof. said plate having a continuous edge with depressions therein between the .middle and the ends thereof to receive parts of the body for anchoring the body to the plate.

5. A brake shoe comprising a body and a plate embedded onthe back thereof, said plate having openings therein to receive the body metal and having a continuous edge spaced from the edge of the body and depressed bctwecn its middle and its ends to permit the bodyinetal to flow up over the plate into the depressionstherein and overlapping said openings in the plate; for anchoring the body to the plate.

ALBERT NELSON.

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