US821000A - Brake-shoe. - Google Patents

Description

PATENTED MAY 22, 1906.

,Iio. 821,000.

P. TAYLOR.

BRAKE SHOE.

APPIJIGATION FILED MAR.13,1905.

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g Vitnesses. mg 51w. QWLL.

Inventor.

UNITED STATES PATENT 'FFTUE.

WILLIAM PERRY TAYLOR, 0F serrate, new roan.

BRAKE-SHQE.

Specification of Letters Patent.

Patented may 22, 19%6.

Application filed March 13,1905. Serial No. 249,712,

To a whom it ntrty concern.-

Be it known that 1, WILLIAM PERRY TAY- Lon, a citizen of the United States, residing in Buffalo, in the county of Erie and State of New York, have invented certain new and useful Improvements in Brake Shoes', of which the following is a specification.

This invention relates to an improved reinforced railway brake-shoe; and it consists of a cast body and one or more plate-like reinforcements which are secured in .the body duringthe casting thereof and in such inanner that the contacting surfaces of the body and reinforcement are fused or,co alesced together.

The object of'the invention is to produce a- Figure l is a vertical longitudinal section through the improved brake-shoe on line a a, Fig. 3. Fig. 2 is a longitudinal section through the improved brake-shoe cut on the curved line b b, Fig. l, concentric with the curved braking-surface of the shoe. Fig. 3 is an enlarged transverse section through the improved brake-shoe on line 0 c, Fig. 2. Fig.

4 is an enlarged transverse section on line d d,

Fig. 2. Fig. 5 is a face view of one of the reinforcements. Fig. 6 is an edge view of one of the reinforcements.

In referring to the drawings for the details of construction, like numerals designate like parts.

The preferred type of this improved brakeshoe consists of a cast body and one or more plate-like reinforcements which are secured in said body during the casting thereof and in a heated condition in such manner that the reinforcement and body are perfectly united by a formation of an. appreciable thickness which is produced by coalescence between the contacting-surfaces of body and reinforcement during the process. of casting. This is accomplished by placing one or more reinforcements in position in a mold after it has been heated and pouring around it the molten metal which isto form the body of i the shoe.

The heating of the reinforcement prevents the chilling of the molten metal as it contacts therewith, so that the molten metal in-the' immediate vicinity: of the heated reinforce ment by its ownjheat increases the heat of the surface of the reinforcement sufficiently topartially melt it and then in cooling produces a state of coalescence between the contactmg surfaces of the reinforcement and body.- The reinforcement is heated only sufficiently to dry it perfectly and prevent chilling, for it has been found by experience that to heat the reinforcement nearly to a melting-point will produce a complete amalgamation between the cast body and reinforce ment and practically destroy the reinforcing strength. The aim of this part of the inventionis to provide for coalescence between the opposed. surfaces of the reinforcement and body for an appreciable extent without completely freeing the reinforcement within the body, and thereby obliterating the reinforcement and destroying its strength. By this process the reinforcement and body are united by a coalesced formation of appreci able extent and still retaintheir individual characteristics. The preferre'd'adaptatioa of this improved brake-shoe comprises a cast body 1 of the usual shape and two reinforcements 2. These reinforcements are similar in contour and of fairly narrow thin fiat-surfaced strips of sheet or wrought metal curved to the curve of the shoe-body and provided in opposite side edges with a series'of notches 3 and 4. The notches are cut in the side ed es of the reinforcement and each have one a we 1 extending transversely and another wall extending diagonally out from the inner termination of the transverse wall, so that a substantially triangular section of metal is cut away to form each notch.

It will be noted that the notches 3 on one edge are in a direction opposite to the notches 4 on the other edge. The purpose of these notches is not only to provide depressions or recesses in the edges of the reinforcements in; which the cast metal of the body will interlock, b t lso to afford means whereby the platesare retained and su ported in place during the cooling of the s cc after chsting the body. The surface ofthe plate reinforcement is even and .flat, with the exce tion that it is curvedto correspond with t e ioo curve of the shoe, and in conformation. it is fa rly tlnn,\narro\\' m width, and about equal mlength to the shoe itself. so that it \\'ill'ex tendtherethrough from end to end. 7. The great advantage of this improvement is that the plate-like reinforcement is completely united throughout to the body by a coalesced for- I mation of an apprecia'ble thickness, which consists in art of cast metal and in part of the metal the reinforcement.

'I claim as my invention 1. A brakeeshoe colnprlslng a cast body and a plate-like reinforcement in said body which 1s umted thereto by a coalesced formation of appreciable extent consisting of fusedtogether portions of the cast metal of the bodyand the metal of the reinforcement,'the

; rema ning parts of the reinforcement and body retalnlng the1r ndependentcharacteristics. '2. A brake-shoe comprising a cast body and a plurality of parallel fairly thin flat-surfaced' reinforcing plates embedded in said body and having notched edges. 5

3.'A brake-shoe comprising a cast body and a' fairly thin flat-surfaced reinforcingplate having at least one recess 1nv its side edge, one yvall of which extends transversely and another wall of which extends diagonally.

6. A brake-shoe com rising a cast body and a plurality of paralle fairly thin flatsur- I faced reinforcing-plates embedded in said body and having portions cut therefrom. V

7. A, brake-shoe comprising a'cast body and a plurality of reinforcing-plates of fairly narrow width embedded in said body and united thereto by coalesced formation.

8. A brake-shoe comprising a cast body and a reinforcing-plate embedded in said body and united thereto by a coalesced formation.

Witnesses L. M. SANGSTER, GEO. A. NEUBAUER.

WILLIAM PERRY TAYLOR.

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