US1488513A - Brake shoe - Google Patents

Description

51 W E c April 1 1924.

BRAKE SHOE Filed June 22; 1923 2 Sheets-Sheet l April 1 .1924.

C. D. PETTIS BRAKE SHOE Filed June 22. 1925 2 Sheets-Sheet 2 I Patented Apr. 1, 1924.

CLIIETON D. 'PETTIS, OF NEW YORK, N. Y.

BRAKE SHOE.

v Application filed June 22, 1923. Serial No. 647,045.

,"To all whom may concern:

Be it known that I, CLIFTON D. Pnrrls, a citizen of the United States, residing at the city of New York, county andState of New York, have invented certain new and useful ".Improvements in Brake Shoes, of which I do declare the following to be a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

"T The present invention relates more particularly to that class of brake shoes for railway cars, in which the body of the shoe is reinforced or strengthened at its back, and the object of the invention is to provide "an improved construction of end lug, which co-operates with some suitable form of center lug, in holding the brake shoe in proper position upon the brake head. I

The invention consists in the improvements hereinafter described, illustrated in the accompanying drawings andjparticularly pointed out in the claims at 'the'end of this specification. V

Figure 1 is a plan view of one end of a brake shoe embodying my invention. Figure 2 is a View in' vertical section on line 22 of Fig. 1. Figure 3 is a plan view of a portion of the back of'the shoe with the end lug removed. Figure 4::is a view of the blank fromv which the end lug will be formed. Figure5 is a plan view of the-finished end lug. Figure 6 is a view in elevation of the end lug looking towards the end of the shoe. F igure? is a view similar to "Fig. l but showing a modified form of the invention. Figure 8 is a View similar to Fig. 2 but showing the back plate with a T- shapecl transverse opening. Figure-9 is a view'in central vertical section through Fig. 7. Figure 1.0 is'aview of the blank from which'the modified end lug is formed. Figure 11 is a plan view of the modified end lug. Figure 12 is a view in elevation of the end lug looking towards the end of the shoe. I have not deemed it necessary in the accompanying drawings to illustrate an entire brake shoe, as. my invention pertains to the end lug portion "only of the shoe. In an application filed by me in the United States "Patent- Oflice September 2, 1922, Sr. 'No.

585,906, which has matured into Patent No. 1,470,478, October 9, 1923, there is shown a type of brake shoe for use in connection with which my invention is particularly well adapted.

the drawings.-

The brake shoe is shown as'comprising a cast metal body A and a pan-shaped reinforcing member B. Preferably the member B comprises a ductile metal back plate provided at its sides and ends (one end only being shown) with integral walls, preferably of expanded ,or reticulated metal,

shoe.

In the form of the invention illustrated upon sheet 1 of the drawings, my improved end lug is preferably metal blank of the shape shown in Fig. 4 of The finished end lug comprlses a channel or box-like body adapted to extend transversely of the shoe, this body which serve to strengthen the body of. the

formed from a sheet having upon its sidenearestthe center of Y the shoe upstanding, inwardly projecting walls that serve to center the brake shoe upon the brake head. To form the finished lug, the sheet metal blank of the shape shown in Fig. 4 of the drawings, is bent upon the lines 10 and lltolorm the top C and the front or outer and rear or inner walls D and E of -the luggandthe blank is bent upon the lines 12 and 13 to form the end walls F and G of the walls are used) form the inwardly extending part H, and is bent upon the upstanding centering walls I and J. When body when end ;is bent upon the line 14 to lines'15 and 16 to form the,

the blank is thus bent, thelug will assume the shape shown in Fig. 5 of the drawings. To enable the upstanding walls I and J to be bent upwardly, slits 17 and 18 are formed in the blank. I

In order that the finished ing may be attached to the brake shoe,

vided a number of flanges or tongues adaptthere are proed to extend beneath and-interlockwith the reinforcing back plate of the shoe. To this end, the wall D-is provided with a flange d, the end walls F'and G are provided re-v spectively with flanges f and 9;,and the part H is provided with a flange hi'bent at right angles thereto.

In applying the improved end lug shown upon sheet 1 of the drawings to a brake shoe, the reinforcing back plate B isprovided with a plurality of slots 20, 21, 22

and23, the slots 20 and 21 being adapted to admit respectively the'flanges f and g at the bottoms of the end Walls of the lug, while the slots 22 and 23 admit respectively the flangesed and h of the lug. When the flanges have been inserted through the sevpreferably ofv the shape flowing of the cast metal about and 11 to form the top and is bent upon the lines adapted to be that when the cast metal comprising the A or" the shoe is united to the reinback in the casting operation, the the flanges back plate body forcing that attach the end lug to the will eiiectively aid in holding these flanges in interlocked. relation with the back plate.

In the modification of my invention illustrated upon sheet 2 of the drawings, the end lug is made from a sheet metal blank, shown in Fig. 10. To form the finished end lug from such a blank, the blank is bent upon thelines 1O C and front or outer and rear or inner walls D and E; it is also bent upon the lines 12*- and 13 to form the end walls F and G; is bent upon the line 14 to form the inwardly extending part H, and 16 to form the upstanding centering walls I and J. Slits 17 and 18 are formed in the blank to permit the walls I. and J to be bent upwardly.

To form the flanges for lug to the back of the shoe, the blank 1s bent upon the line 19 to form the long flange cl, upon the lines 19 to form the flanges 6, upon the lines'19 and 19 to form the flanges f and'g, and in this form of the invention, the part H is formed with a flange or extension hi adapted to interlock with the back plate of the shoe, as will presently appear. The blank is slitted betweenthe flanges e and walls I and J.

The end lug last described is especially used in connection with a back plate B adjacent the end of which is formed a transverse opening (preferably a T-shaped opening) adapted to receive the body'ot the lug and the upstanding centering walls I and J.

Before the cast metal body A is poured into the pan-shaped back or shell of the shoe, the end lug will be placed within the transverse opening 25 of the back plate E, as shown in Fig. 7 of the drawings, and when in such position, the flanges d, 03f, g

and the extension h. will serve to securely hold the end lug in-position. The cast metal forming the body of the shoe will flow about the several attaching flanges and insure the interlocking of these flanges with the reinforcing backplate of th shoe. 7

By reference moreparticularly to Fig. 9 of the drawings, it will beseen that when the cast metal is poured within the panshaped reinforcing back or shell of the shoe, such metal will flow into the box-shaped .1 body of the lug, forming a cast metal part attaching the a that will serve to reinforce the body of the end lug.

While I have described what I regard as the preferred embodiments of my invention, it will be understood that the details above described may be parture from the scope of the invention and that features of the. invention maybe employed without its adoption as an entirety.

Having thus described. my invention, what I claim as new and desire to secure by Letters Patent is 1. The combination with a brake shoe, of an end attaching lug comprising a channel or box-like body extending transversely of the shoe and provided with integral flanges for attaching the lug to the shoe.

2. The combination with a brake shoe, of an end attaching lug formed from ductile metal and comprising a channel or box-like body having 'i'ront, rear and end walls and provided with flanges for attaching the lug to the shoe.

3. The combination with a brake shoe, of an end attaching lug comprising an inverted channel or box-like body extending transversely of the shoe, said body having side and end walls provided at their edges with flanges for attaching the lug to the 1 shoe.

4. The combination'with a brake or box-like body extending th shoe and having upstanding, inwardly projecting j'c'enterin'g walls, and flanges for attaching the lug to the shoe.

5. The combination with a brake shoe, of an end attaching lug comprising an invert= ed channel or box-like body extending transversely of the shoe and having u'pstanding, inwardly projecting centering walls and having flanges integral with said body for attaching the lug to the shoe.

6. The combination with a brake shoe,'of an end attaching lug comprising a channel or box-like body extending transversely of the shoe, the inner wall of said body having integral therewith an inwardly extending part provided at its edges with upstanding centering walls.

7. The combination with a brake shoe, of an end attaching lug comprising an inverted channel or box-like body extending transversely of the shoe, the inner wall of metal and comprising an inverted channel or box-like body having front, rear and end walls, the front and end walls being formed with attaching flan es, and having formed varied without deshoe, of anend attaching lug comprising a channel" transversely of said body integral with its rear wall an inwardly extending part provided at its side edges with upstanding centerin walls and provided at its end with an attaching flange.

9. The combination with a brake shoe having a reinforcing back, of an end lug having a transversely extending channel or box-likebody provided with flanges bent to engage the inner side of said back plate.

10. The combination with a brake shoe having a reinforcing back provided adjacent its end with a transverse opening, of an end lug having a transversely extending body arranged within said opening, said body having flanges for holding the end lug in place.

11. The combination with a brake shoe having a reinforcing back provided adj acent its end with an opening, of an end lug comprising a transversely extending inverted channel or box-like body located at said opening and having flanges for holding the end lug in place.

12. The combination with a brake shoe having a cast metal body and a reinforcing back provided adjacent its end with an opening, of an end lug attached to the back at said opening, the cast metal of the brake shoe body extending into said lug.

verse T-shaped opening, of an end lug comprising a transversely extending, inverted box-shaped body located within said opening, said lug having an inwardly extending part provided with upstandin centering walls and havingflanges for holifing the end lug in place, the cast metal of the shoe body extending into said lug.

15. The combination with a brake shoe having a reinforcing back provided adjacent its end with a transverse opening, of an end lug comprising an inverted channel or box-like body having flanges to engage the back of the shoe and having an inwardly extending part provided with upstanding centering walls and with a flange to engage the back of the shoe.

- CLIFTON D. PETTIS.

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