US746172A - Brake-shoe and process of making same. - Google Patents

Description

No. 746,172; PATENTED DEG. 8, 19O3,

W. D. SARGENT. BRAKE SHOE AND PROCESS OP-MAKING SAME.

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UNITED STATES Patented December 8, 1903.

PATIENT OFFICE.

WILLIAM DURHAM SARGENT, OF NEW YORK, N. Y., ASSIGNOR TO AMERICAN v BRAKE SHOE & FOUNDRY COMPANY, OF NEW YORK, N. Y., A CORPORA TION OF NEW JERSEY.

BRAKE- -SHOE AND PROCESS OF MAKING SAME.

SPECIFICATION forming part of Letters Patent No. 746,172, dated December 8, 1903. I

Application filed June 26,1902.

To all whom, it may concern:

Be it known that I, WILLIAM DURHAM SAR- GENT, a citizen of the United States of America, residing in the city, county, and State of New 5 York, have invented certain new and useful Improvements in Brake-Shoes and Processes of Making the Same, of which the following, taken in connection with the accompanying drawings, is a specification.

The first of the objects of my present in vention is to render the unworn portion of brake shoes, usually discarded, available for re-use, so as to reduce the amount of metal necessary for the construction of new shoes.

In carrying out my invention, I first construct a shoe which is provided with recesses or indentations in the back thereof, extendin g part way through the shoe towards the face of the same, say about two-thirds of the way, such indentations or recesses bein g preferably narrow towards the face side of the shoe, and so disposed that when the shoe is worn down until it is no longer suitable for use the recesses or indentations will form apertures or holes which will extend entirely through the shoe, and afford means for securing to the worn portion of the shoe a new wearing face or sole, which can be cast upon the same by placing the wornpart or back portion in the mold and pouring the metal for the new sole upon the same.

In order that my improvements may be better understood, I will now describe the same in connection with the accompanying draw- 5 ing, in-which Figure 1 shows a back view of a shoe embodying my improvements;

Figure 2 is a section of the same on the line 2 of Figure 1;

Figure 3 shows a section of the shoe after it is worn down ready to be re-soled; and

Figure 4 shows a shoe constructed from the discarded portion or old part-which I shall term the back portionwith the new sole applied thereto.

As will be observed by examination of the drawings, I provide a shoe which has recesses or indentations, which I have marked 5, ex-

fierial No. 113,294. (No model.)

tending from the back thereof toward the the steel place as shown in Figures 1 and 2. -5 5 When the shoe is used, the. face thereof wears away until the recesses or indentations are reachedby the wheel tread when they become holes or apertures, as indicated at 7 in Figure 3. After this, the shoe can be taken and placed in a mold and a new sole, as indicated at 8, cast on the same, the metal of the new sole running into the'apertures, as indicated at 9, and by the dovetailed shape of the same securing a firm hold on the back portion of the shoe, as will be apparent without fur ther explanation.

After the new sole, 8, has been worn out, the back may be used still another time, and so on almost indefinitely, provided a predetermined amount of wear is not exceeded.

By the method above described, those portions of the brake shoe which-are now discarded and sold at the price of scrap, become equally as valuable as the metal in the new shoes, while, in the case of what are known as re-inforced or steel back shoes, the most expensive part of the shoe, 1'. e. the steel back, being but three sixteenths of an inch thick, and located at the extreme back of the shoe,

can always be saved, and with ordinary care,

embedded as it is in the surrounding cast iron, can be used over and over again without additional expense.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A brake shoe comprising a back or body portion having' perforations therein and a wearing sole cast upon the face of said body 0 portion and filling the said perforations, the face of the body portion being ground to the shape of a wheel, substantially as. described.

2. The process of re-soling brake shoes which consists in providing a body with recesses extending from the back toward the face, allowing the shoe to Wear down on the I new Wearing sole upon said Worn shoe, subwheel until said recesses are exposed and then casting upon said body portion a new Wearing soleiwhich precisely fits the face of the body and fills the said perforations.

3. The herein described process of making brake shoes consisting of forming a shoe with recess extending from the back toward the face; permitting said shoe to wear back to a re point beyond said recess, and then casting a stantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing Witnesses:

PAUL CARPENTER, PHILIP J. FINNEGAN.

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