US411861A - Samuel hatt - Google Patents

Description

(No Model.)

S. HAT-T. BRAKE SHOE.

No. 411,861 Patented Oct. 1, 1889.

UNITED STATES ATENT' FFICE.

SAMUEL HATT, OF MONTREAL, QUEBEC, CANADA, ASSIGNOR TO GEORGE SANDERSON, OF SAME PLACE.

BRAKE-SHOE.

SPECIFICATION forming part of Letters Patent No. 411,861, dated October 1, 1889. Application filed July 26, 1388. Serial No. 281,105. (No model.)

To [LZZ whom, it may concern:

Be it known that I, SAMUEL HATT, a subject of the Queen of Great Britain, residing at the city of Montreal, in the district of Montreal and Province of Quebec, Canada, have invented new and useful Improvements in Brake-Shoes; and I do hereby declare that the following is a full, clear, and exact description of the same.

My invention relates to an improved construction in brake-shoes, chiefly used for the Wheels of railway-cars, formed partly of hard or chilled metal and partly of soft metal, the soft portion giving the shoe a good hold upon the wheel, and the hard portion causing the shoe to Wear much longer than if of soft metal throughout. I

The object of my present invention is to save considerable trouble in the molding of the shoe and give at the same time a very desirable species of shoe.

In the drawings hereunto annexed similar letters of reference indicate like parts, and Figure l is a side elevation of a brake-shoe embodying my invention. Fig. 2 is a face View of the brake-shoe shown in Fig. 1. Fig. 3 is a transverse section on line a, 2, on a larger scale, delineating therewith a manner of molding the shoe.

In this case the shoe is cast-all in one piece in a mold constructed to give it the desired configuration and dimensions. This mold is formed with its part A of ordinary molding sand for casting ordinary soft metal, andnot only is the face I) of the shoe cast against or upon this, .but it also extends any desired distance up the sides and ends of the shoe, as shown at (J.

D is the continuation of the mold, arranged in any of the ordinary manners to cause a chilled or hard marginal part E on the outer portion of the shoe, as shown part-1y divided by the dotted lines m. This is so arranged that the shoe when cast will have a hard marginal part E and a soft central part 1 It is desirable that the hard portion E shall not come in contact with the Wheel until the shoe has become Worn to the shape of the wheel. Therefore the chilled or hard part E may not, when the shoe is cast, extend to the face, but only relatively to about the dotted line y in Fig. 1, This will be also understood by the manner in which the section of theshoe shown in Fig. 3 is scction-lined.

G is any desired cover to the mold, and H is any desiredprojection formed on the back of the shoe by which it may be attached to any ordinary brake-head; or this maybe done in any other ordinary Way desired, as at present in use.

\Vha t I claim is as follows:

As an improved article of manufacture, a brake-shoe, substantially as described, havinga marginal portion of chilled metal formed on its sides and arranged, as described, so that there will be a uniform relative proportion of chilled and soft metal throughout the planes of its wear from front to back, the Whole substantially as described.

SAMUEL HATT.

\Vitncsses:

G. Dorms, CHARLES G. G. SIMPSON.

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