US809627A - Brake-shoe. - Google Patents

Description

No. 809,627. PATENTED JAN. 9, 1906. W. H. NAMAGK.

BRAKE SHOE.

APPLICATION FILED MAY 2, 1905,.

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UNITE STATES PATENT orrron.

Specification of Letters Patent.

Patented Jan. 9, 1906.

Application filed May 2, 1905. Serial No. 258,450.

To all whom 1 2% inrty concern.-

Be it known that I, WVILLIAM HENRY NA- MACK, a citizen of the United States of Ameriea, residing at Ballston, in the county of Saratoga and State of New York, have invented a new and useful Brake-Shoe, of which the following is a specification.

My invention relates to improvements in brake-shoes, and comprises a body and a plug having arms embedded in said body, the latter consisting, preferably, of cast-iron and said lug of steel, all as hereinafter set forth; and the objects of my invention are, first, to provide a strong and durable brake shoe which can be economically constructed, in that there is a saving in the metal, and the process of molding the body and at the same time uniting the lug therewith is comparatively simple and easy; second, to furnish such a device which is free from the objectionable feature of scoring the wheel to which it is applied or of wearing such wheel unevenly; third, to provide an exceedingly strong and firm connection between the body and its lug, and, fourth, by embedding the lug in the body in such a manner as to cause the tension to be counteracted by the compression, and vice versa, to eliminate deflection, or, in other words, to do away with the liability of the parts to separate and the strain to be unevenly distributed. Hence the original shape of the shoe is maintained and its life prolonged. I attain these objects by the means illustrated in the accompanying drawings, in which Figure 1 is a plan view of a regular shoe embodying my invention; Fig. 2, a side elevation and partial section on lines as 00, Fig. 1, looking in the direction of the arrow; Fig. 3, a plan view of a lug and its appurtenances designed for use in a flange brake-shoe, and Fig. at a cross-section through a flange brake-shoe which embodies my invention.

Similar letters refer to similar parts throughout the several views.

The essential feature of my invention isa lug of peculiar construction or formation partially cast into the body in such a manner that said lug is securely anchored to said body with the embedded portions of the former completely surrounded and covered by the latter. By preference, the lug is bifurcated in two places, and the arms thus formed are completely buried in the body, the body metal entering between such arms, as well as otherwise covering them, which increases the firmness and rigidity of the union between body and lug. Not only is the shoe strong, but economical as well, both as to cost of production and lasting qualities. This shoe can be used until worn away close to the embedded portions of the lugs.

The arms of the luggenerally have a similar curved formation to that of the body, and the outer edges of such arms fall short of corresponding edges of said body, although it is not necessary to adhere strictly to either of these limitations.

Referring first to Figs. 1 and 2, it will be observed that a body a, preferably of castiron, as hereinbefore stated, is provided, to which a lug h is attached by means of four arms 0, said lug having a longitudinal opening or passage (Z therethrough and transverse or lateral openings (:0. The body a maintains in general the shape of any ordinary brake- ,shoe and may of course be changed more or less to adapt it to the particular use for which it is intended. The lug b, which should be of more substantial material than cast-iron and is 'usually made of steel, as already stated, comprises a top portion, four side pieces 7/ springing therefrom, and the same number of arms 0, before mentioned. The arms 0 are continuations of the side pieces Z), but at different angles.

in constructing the shoe the lug b is arranged with its arms 0 and portions of its sides I), which are adjacent to and join said arms, in the opening in the mold which is to receive the metal of which the body a is formed. Then such metal is poured in and said body cools with the aforesaid portions or parts of the lug embedded therein and firmly united therewith. In this manner and by this construction 1 am able to produce a brake-shoe possessing essentially all of the advantages which are necessary in a device of this kind.

For a flange brake-shoe I provide the same kind of a lug as before except that it has added thereto a pair of wings f, springing from corresponding outer longitudinal edges of two of the arms 0, as clearly shown in Fig. 3. Portions of the sides 6 and the arms 0 of this lug are embedded in the body (0, (shown in Fig. 4,) which is provided with a flange a/ in the manner already described, and each of the wings f is similarly embedded in said flange. Aspace is left between adjacent ends of the two wings finto which the cast metal extends, as between the arms 0 of each pair and for the same purpose.

IOC

Without limiting myself to the exact construction and relation of parts herein shown and described, what I claim as my invention, and desire to secure by Letters Patent, is-

l. A brake-shoe comprising a body, and a lug having longitudinal and transverse openings therein and provided with imperforate portions extending longitudinally of and embedded in said body.

2. A brake-shoe comprising a body, and a lug having longitudinal and transverse openings therein and provided with portions thereof embedded in said body, the parts being so constructed and arranged that the materialwhich forms the body surrounds and covers certain portions of the lug and enters between imperforate parts of the same.

3. A brake-shoe comprising a body, and a lug having longitudinal and transverse openings therein and consisting in part of bifurcated portions partially embedded in said body.

4:. A brake-shoe comprising a cast-metal body, and a lug of stronger material having longitudinal and transverse openings therethrough and provided with bifurcated portions embedded in said body.

5. As anew article of manufacture, a brakeshoe lug consisting of a top portion, side pieces extending from such portion, and a plurality of arms extending from said side pieces, the latter being at right angles to the longitudinal direction of said arms.

6. As a new article of manufacture, a brakeshoe lug consisting of a top portion, a plurality of side pieces springing from the lateral edges of said top portion, and a plurality of arms extending outward from the bases of said side pieces.

7. A brake-shoe comprising a body, and a lug consisting of a top portion, a plurality of side pieces springing from the lateral edges of said top portion, and a plurality of arms extending outward from the bases of said aid; pieces, said arms being embedded in said 8. Abrake-shoe comprising a flanged body, and a lug consisting of a top portion, side pieces extending from such portion, a plurality of arms extending from said side pieces, the latter being at right angles to the longitudinal direction of such arms, and a wing projecting from one of said arms, the arms and wing being embedded in said body and its flange.

9. A brake-shoe comprising a body having a flange on one side, and a lug consisting of a top portion, a plurality of side pieces springing from the lateral edges of said top portion, a plurality of arms extending outward from the bases of said side pieces, and wings projecting from the edges of said arms which are adjacent said flanges, the arms being embedded in said body and said wings in the flange.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

lVILLIAM HENRY NAMAOK. Witnesses:

CLAUDE S. ULINE, CHARLES W. ULINE.

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