US263769A - John f - Google Patents

Description

J. P. GURTIOE.

BRAKE SHOE.

No. 263.769. Patented Sept. 5l, 1882-.

(No Model.)

` JOHN F. OURTICE, OF FORT WAYNE,

UNITED STATES PATENT OFFICE.

INDIANA, ASSIGNOR TO THE STAND- ARD BRAKE SHOE COMPANY, OF SAME PLAGE.

eRAKE-si-lol-:`

SPECIFICATION forming part of Letters Patent No. 263,769, dated September 5, 1882. i

Applimcation led January 27, 182. (No model.)

To all 'whom it may concern Beit known that I, JOHN F. GURTICE, of Fort Wayne, county of Allen, State of Indiana, have invented a new and useful Improvement in Brake-Shoes; and I declare the following to be a full, clear, and exact description of the either end of a device embodying my invention. Fig. 3 is a separate view of the shoesupport. Fig. 4 is a separate view of the shoe.

It is the object of my invention to produce .a brake-shoe and its support so constructed relatively to each other that while the requisite strength is insured a large saving in weight is eiected as compared with those commonly in use, and the shoe is rendered easily reversible upon its support, and more even and thorough Wear and greater durability secured, 1n which the parts are capable of being quickly and strongly united or quickly disengaged, as desired, economizing labor in either case by the ease and rapidity of adj ustment or removal, and aftbrding, when united, a very solid and secure abutment of the shoe against the support in the direction of the forward travel of the wheel and ample security againstdisplacement by the reverse :motion of the wheel, or vice versa, if changed to the opposite side of the wheel.

To this end A is a brake-shoe support, having the usual facilities, A', for readily securing it to a brake-frame.

B is the shoe, made alike at both ends, so as to be reversed, when desired, by reason of uneven wear upon the face. At a suitable distance from each end are lugs B', projecting from the shoe, and ot' such form as to leave suitable dovetailed mortises, B2, at their mid- "dle points, as shown.

The shoe is placed upon its support by engaging the dovetail mortises with the corresponding tenons on the support and thekey a.' inserted.

An examination of the drawings will show that this device is exceedingly simple and effective. The four lugs B upon the shoe render it practically impossible to break the shoe from its support. Moreover, the end faces of the lugs B so engage the shoe-support A that little or no strain is thrown upon the tenons.

The cross-piece or abutment A3 is made sufmay be imparted to it by the shoe as the brake is applied to the wheel. It prevents the shoe from sliding any farther along the tenons, and the removable key a prevents the shoe from disengaging When the wheel is reversed.

This device is capable of being made much lighter while still fully as strong as, or even stronger than, those commonly used, and needs only to be properly cast in order to be ready for use without any drilling o'r dressing ofthe parts, and is therefore cheaper to construct. When it is necessary at any time to renew a shoe it can be done in a few moments by simply removing the key n. So, also, it is but a few minutes7 work to reverse the shoe upon the same support or change the shoe to any other wheel on thel same side or upon the opposite side of the car, if desired, in order to wear it down uniformly throughout.

It is obvious that my device may :also be so constructed that the angles at which the parts of the shoe and its support fit together, instead of being exactly similar to those shown in the drawings, may vary therefrom more or less, if desired, or even curved or other suitable lines be substituted therefor.

I am aware that brake-shoes have been provided with a support having dovetailed grooves formed by lugs projecting from its body, and j the shoe proper provided with dovetails 1 ariciently heavy towithstand any thrust which IOO ranged in the sameline upon the upper side of the shoe 3 but this device dii'ers from mine in that the strain is concentrated upon-the neck of the dovetail,which is not braced by a piece formed integral therewith and extcnding'crosswise to form a seat for the lugs upon the support, and to reduce or obviate the strain upon the dovetail.

I am also aware that brake-shoes have been made with the liner or shoe provided with dovetailed sockets in which lugs upon the head or support are placed. This device embodies practically the saine defects as the above-noted device. I, however, overcome all Adefects by providing the shoe with two lugs upon each end, and having a dovetail groove between each pair, which fit over a dovetail and are seatedagainst a transverse projection formed integral with the dovetail, so that the strain will be scattered over a greater area. Therefore yWhat I claim as new is-v 1. A shoe having lugs arranged in pairs,with

a dovetail socket between each pair, in combination with a support having dovetails extending lengthwise of the support, and a transverse projection formed integral with the forward dovetail, for the purpose set forth.

2. A shoe, B, having projections B arranged in pairs, with dovetail socket B2 between each pair, in combination with a support, A, having dovetail A2, provided with projection A3, placed transversely to and formed integral with dovetail A2, andl a dovetail, A4, having a key-seat and key for holding the shoe in place.

In testiniony whereof I sign this specification in the presence of two witnesses.

JOHN i?. cunrrrcn.

Witnesses:

W. S. BUCK, ISAAC DIRAY.

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