US1914230A

US1914230A - Brake shoe structure

Info

Publication number: US1914230A
Application number: US582271A
Authority: US
Inventors: Charles W Armbrust
Original assignee: Individual
Current assignee: Individual
Priority date: 1931-12-21
Filing date: 1931-12-21
Publication date: 1933-06-13
Anticipated expiration: 1950-06-13

Description

June 13, 1933. c. w. ARMBRUST BRAKE SHOE STRUCTURE Filed Dec. 21, 1931 Patented June 13, 1933 UNITED STATES CHARLES W. ARMBRUST, OF MIDDLETOWN, NEW YORK BRAKE SHOE STRUCTURE Application filed December 21, 1931. Serial No 582,271.

My invention relates to brake shoe structures for railway car brakes and the like.

It is the principal purpose of this invention to provide a brake shoe in which the wearing portion of the shoe is divided into two sections or castings at the point of connection to the brake head and in which the two sections are then connected by means of a steel lug or lugs which are molded or otherwise securely mounted in the sections.

More particularly it is a purpose of this invention to provide a two-piece type of shoe with a steel reenforcing back which also connects together the two sections of a shoe so that the same may be handled as a unit.

My invention contemplates also the spacing of the half shoes or sections apart by a steel lug or steel back so that they may settle back against the four prongs of the brake head thus taking the strain ofi' of the shoe and putting it squarely on the brake head where it belongs.

Furthermore, it is a purpose of this invention to provide in a brake shoe assembly utilizing two castings or halves connected together by steel lugs or other sufliciently elastic means a novel connecting structure whereby a partially worn out shoe may be connected directly into the face of a new shoe so as to provide an interlocking brake shoe unit made up of a pair of brake shoes.

I will describe the preferred form of my invention by reference to the accompanying drawing wherein Fig. 1 is a side view of a brake shoe mounted on a brake head illustrating a simple form of a two-piece brake shoe;

Fig. 2 is a side view illustrating another form of brake shoe provided with transverse key leaves by means of which a pair of shoes may be keyed together;

Fig. 3 is a side view partly in section illustrating the interlocking of a worn out shoe with a new shoe of the split type.

Referring now in detail to the drawing, the numeral 5 illustrates the usual brake head having the :tour prongs 6, 7 8, and 9 which are adapted to engage against the hack of a brake shoe 10 and hold the same so that it can be pressed against the wheel of a car or other vehicle. The brake head is keyed to the brake shoe by means of. a locking key 11 through "the central holding lug portion 12.

Suitable guide lugs at 13' and 14 serve to properly position the shoe on the brake head.

The shoe 10, as shown, is made up of a pair of castings or

halves

15 and 16 which halves each contain a half of the central lug 12 and which are separated a small distance as indicated at 17 so as to permit them to settle back solidly against the prongs of the brake head. These

castings

15 and 16 are connected by means of the steel reenforcing lug or plate 18 which, as shown, extends down through the sections of the central lug and into the base of each half of the shoe as indicated at 19 and 20., This steel lug serves as an efficient means for connecting the two halves together so that they may be handled as a single unit at all times. However, owing to its elasticity and the fact that it slightly spaces the two halves, this steel lug permits relative movement of one half to the other in order that they may adjust themselves upon the brake head prongs and thus prevent unnatural strain upon the castings.

In Fig. 2, the same brake shoe 10 is shown as provided with a socket as indicated at 21, and the adjacent ends of the two sections 15 and 16' are slotted transversely as indicated at 22 and 23 so as to receive a transversely extending key to lock two similar shoes together in a manner much like that shown in Fig. 3. It is understood, of course, that the central lug 12 of this shoe as well as the central lug 12 in the shoe shown in Fig. 1 is properly apertured to receive the key 11 for securing the shoe to the brake head.

Referring now to Fig. 3, in this figure I show the shoe 25 as provided with a steel reenforcing backing 26 which also connects the two

sections

27 and 28 to each other at the center lug spacing the two sections apart as indicated at 29. A worn shoe 30 of duplicate construction is shown as mounted on the face of shoe 25 which is provided with a recess as indicated at 31 to receive the central lug of the shoe 30. The

shoes

25 and 30 may be held together by the transverse key as indicated at 32 or by means of the lugs or

projections

33 and 34 extending into the apertures or seats provided for the brake head key on the worn out shoe 30 or both of these methods of fastening may be used if desired.

By virtue of the elasticity or flexibility of the steel connecting member 26 which connects the two

sections

27 and 28, these two sections may be spread apart by rocking them back in the direction indicated by the arrows in Fig. 8 thus making the gap between them at -a- (shown in Fig. 3) wider on the side opposite the connecting web 35 of the steel member 26. This spread can readily be made sufficient to permit the insertion of the worn out shoe 30 between the

lugs

33 and 34, and then, when the two halves of shoe 25 are returned to their normal position, the lugs will engage in the apertures provided in shoe 30 and thus lock the two shoes together.

By this construction, I am able to obtain the advantages of an interlocking shoe in a two-piece casting type of shoe made integral in molding with no extra construction or parts needed other than the connecting steel lug or strap 35 or I could cast in the mold steel lugs for the same purpose.

It isbelieved to be obvious from the above description that various minor modifications may be made without departing from the scope of the invention as defined by the claims.

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

1. In combination, a new brake shoe consisting of two half shoes connected together .and spaced apart by a flexible integral reenforcing back, each half shoe having one or more sockets in its face and corresponding lugs on its back, each half shoe being so cut away at its adjoining edge as together to form a socket in the center of the complete shoe, and a worn brake shoe of similar construction fitted into the receiving sockets of said first mentioned brake shoe by flexing the two halves of said first mentioned brake shoe apart and then back together so that the second mentioned brake shoe is interlocked therein, and suitable complementary key and slot means on the brake shoes interengaging to secure the two shoes together.

2. A brake shoe combination consisting of two half shoes each having a portion of a holding lug on its back and the two halves when placed end to end providing a socket opposite the holding lug to receive the corresponding holding lug of a similar shoe, a connecting means linking said holding lug portions together for swinging movement of said halves to open said socket, a second shoe having a holding lug seated in said socket,

cooperating projections and seats on the in terfitting portions of said shoes normally locking the shoes together, said projections and seats being separable by swinging movement of said half shoes to spread said socket.

3. A brake shoe assembly whereby two integral brake shoes may be locked together face to back to prevent longitudinal and sidewise displacement therebetween comprising two brake shoes, one consisting of two end portions swingingly united, and interlocking means consisting of complementary interfitting portions upon the respective shoes, and said swinging mounting permitting spreading of one shoe to receive the other.

i. A brake shoe assembly whereby two integral brake shoes may be locked together face to back to prevent longitudinal and side wise displacement therebetween comprising two brake shoes, each consisting of two end portions swingingly united, and interlocking means consisting of complementary interlitting portions upon the respective shoes, and said swinging mounting permitting spreading of one shoe to receive the other.

5. A brake shoe assembly whereby two integral brake shoes may be locked together face to back to prevent longitudinal and sidewise displacement therebetween comprising two brake shoes each being an integral structure and one shoe consisting of two end portions connected together for angular move.- ment relative to each other, complementary projections and sockets on the respective shoes provided with complementary locking portions interengageable by swinging said end portions out of normal position.

6. A brake shoe assembly whereby two in tegral brake shoes may be locked together face to back to prevent longitudinal and sidewise displacement therebetween comprising two brake shoes each being an integral structure and one shoe consisting of two end portions connected together for angular movement relative to each other, complementary projections and socketson the respective shoes provided with complementary locking portions interengageable by swinging said end portions out of normal position, and a bral e head receiving said shoes and securing said end portions in normal position.

7. A brake shoe combination comprising a pair of shoes each made up of two end portions connected together at their backs for relative angular movement in a plane vertical to the wearing face of the shoe, each of said shoes having a projecting holding portion where the end portions join for receiving the holding portion of a similar shoe, said recess and holding portion having cooperating projections and seats interengageable for looking the shoes together by angularly moving at the back and having a recess at the front-= .9

8. A brake shoe structure whereby two integral brake shoes may be locked together face to back to prevent-longitudinal and sidewise displacement each brake shoe having 5 integral therewith complementary portions adapted to interlock with the complementary portions of the other shoe for locking them together and preventing sidewise or lengthwise displacement thereof.

19 In witness whereof, I hereunto subscribe my name this 4th day of December, A. D.

CHARLES W. ARMBRUST.