US1907635A - Brake shoe - Google Patents

Description

May 9. 1933. w. H. WINTERs 1,907,635

BRAKE SHOE Filed May 23, 1952 y 2 Sheets-Sheet 1 May 9, 1933. w. H. wlNTl-:Rs 1,907,635

BRAKE SHOE Filed May 25, 1932 2 Sheets-Sheet 2 //llllllllllllll III/1111111.'

Patented May 9, 1933 UNITED STATES IVILBUB. XVINTERS, OF LARCHMONT, NEW YORIL ASSIGNOR TO THE AMERICAN l PATENT oFFlc-E c 7 BRAKE SHOE AND FOUNDRY COMPANY, OF WILMINGTON, DELAWARE, CORPORA- TION OF DELAWARE BRAKE SHOE Application led May 23,

rIhis invention relates to brake shoes and its object is primarilyA to provide a strong and rigid reenforce backwith the body securely anchored thereto. y

The invention is particularly adapted for the type of 'brake shoes known as filled shoes which comprise a metal shell and a composition body molded therein, but it mayv be used in shoes having` a metal body with shell backs of the pan type or with plate backs.

Another object of the invention is to provide means for anchoring the body oit' the shoe securely to the reenforce back on the shoe, and this back may be a part of a shell, a pan, or simply a plate, so that the body will not break away from the back in service.

And a further object of the invention is to provide a lled shoe with a double reenforce back with the composition body securely anchored thereto.

In the accompanying` drawings illustrating selected embodimentsof the invention, 4

Fig. 1 is aside view of a. filled brake shoe with the upper half in plan and the lower half in section on` the line 1 1 of Fig. 2.

Fig. 2 is a back view of a shoe corresponding to Fig. 1 with the upper half in plan and the lower half in section taken just under the back of the shell, the body material being removed from a part of the inner back in this section. y

Figs. 3 and l are 'longitudinal sectional views on the lines 3 3 and 4f-respectively of Fig. 2.

Fig. 5 is a fragmentary end view of a part of the inner back shown in Figs. 1 to 4, partly in section. y

Figs. 6, 7, 8 and 9 are transverse sectional views through the complete shoe as indicated by the lines 6 6, 7 7, 8 8 and 9 9 respectively of Fig. 2.

Figs. 10 and 11 are transverse sectional views illustrating other embodiments of the invention.

I have illustrated the invention in a lilled shoe in Figs. 1 to 9 but the body of the shoe maybe made of metal instead of composition if desired. Referring to these iigures, 12 is the body and 13 is the shell in which the 193e semi No. 612,943.

body is molded. This shell comprises a back 14 and depending sides 15 and ends'16, the sides, and also the ends ifdesired, being provided with openings 17 to receive the body material during the molding operation to assist Vin anchoring the body in the shell. I

also prefer to press up theback of the shell, at 18 to receive the body material and forni t inner back. The backs are provided with longitudinal oppositely disposed ribs or corrugations which abut and space the backs apart onboth sides of the ribs. The ribs 22 on the outer backV are pressed `inward and the ribs 23 on the inner back may be pressedA upward to abut the ribs 22 but they larel pref-l erably formed by depressing the adjacenty parts 24 of the inner back so that the end portions v25 of the inner back may lie'close to the outer back. The inner back is preferably bifurcated at its ends to extend on both sides of the guide lug and it is provided 1 with flanges 26 whichfproject through the openings 19 in the outer'back and form side facings for the end lugs. The inner backis rigidly secured to the outer back inv any` suitable manner and for this purpose the metal, ora part of it, cut in forming the openings 19 in the outer back maybe bent inward and hooked upon the end portions of the inner back vat 27; or the inner back may be welded. to the outer back. The `inner back is provided with openings 28 disposed in the depressed portions 24between the ribs 23 and, when the body is molded in the shell. the body material passes through these openings and into the depressions to assist in anchoring the body in the shell. The" body material. will ilow in the depressions and more or less fill the same but at any rate sufficiently to button and anchor the body material to the inner back. The bodymaterial will also flow over the side and end edges of the inner back and it is contemplated that all the space between the inner and outer backs will be filled or substantially lled with body material and -will securely anchor the body to the inner back and within the shell.

In Figs. l to 9 I have shown the backs provided with abutting ribs but the outer back 29 may be provided with ribs 30 and the inner back 3l left flat transversely as shown in Fig. l() or the inner back 32 may be provided with ribs 33 and the outer back 84 left flat transversely as shown in Fig. l1, and the backs may be spot welded as indicated at 35. Vhen the ribs are formed in one back only it will probably be necessary to make them deeper than when the backs are provided with abutting ribs so that sutiicient anchorage space will be provided between the backs.

I have shown la shell in Figs. l to 9 of a general type which would ordinarily be used for filled shoes and this shell has rather deep sides and ends but I may make the shell with short sides and ends as shown in Fig. l0 or I may omit the sides and ends and provide a plate back as shown in Fig. 11.

The body in any of the forms of the invention herein shown and described may be made of composition or ofcast iron or other material adapted for use in brake shoes.

The invention may be embodied in brake shoes of any kind and for any purpose for which it is or may be adapted and it may be provided with attaching lugs of any suitable kind. I have shown the invention embodied in a car shoe and provided with a center attaching lug 36 made of sheet metal stamped to shape and provided with legs 37 which extend down through slots .38 in the backs and are bent laterally to interlocking' engagement with the backs.

My invention provides for securely anchor` ing the body to the reenforce `back in a brake shoe and it is particularly important for anchoring a compositionhody in a shell. It is preferred to anchor the body material to the sides of the shell of a filled shoe in accordance with past practice but this is not always sufficient to secure the bodyin the shell for the shell is liable to spread under some con-V ditions of service and permit disintegration of .the body material and also permitit to fall away. invention reduces thelahility ofthe shell to spread or otherwise 4become deformed in service by reentorcing theV shell, and it also reenforces the shoe as a whole and enables the shell to be made with an. imperforate back except for the openings to receive the end lugs and the slots to receive the attaching lug and thereby avoids substantial reduction in the strength of the hack which results from providing it with anchoring openings. The invention accomplishes the double object of providing substantial reenforcement at the back of the shoe and effective anchorage for the body of the shoe, whether the outer back is part of a shell or a separate part and whether the body is made of composition or of metal. The invention also makes use of the strengthening ei'ect of the longitudinal ribs which enables the backs to be made of lighter gage rnaterial and still provide sulicient strength.

I do not limit the invention to the particular disclosure shown in the drawings and herein described because brake shoes are made in many different sizes and shapes and designs and I reserve the right to embody the invention in any of these sizes, shapes and designs for which it is or may be adapted and to make any changes within the scope of the following claims.

I claim:

l. A brake shoe comprising an outer back and an inner back, said backs being spaced apart and secured rigidly together, and a body anchored to said backs, a part of the body material substantially filling the space between the backs.

2. A brake shoe comprising an outer back and an inner back, said backs being spaced apart and secured rigidly together, and a body anchored to said backs, the inner back having openings therein to permit the body material to flow therethrough into the space between the backs for anchoring the body to the backs. i

3. A brake shoe comprising an outer back and an inner back, said backsrbeing rigidly secured together and having abutting ribs which space them apart adjacent the ribs, and a body anchored to said backs, a part of the body material substantially filling the space between the backs.

4. A brake shoe comprising an outer back and an inner back rigidly secured together, said backs having abutting longitudinal ribs which space them apart adjacent the ribs, the inner back having openings between the ribs, and a body anchored to said backs, the body material filling the openings in the inner back and buttoned on the inner backl inthe space between the backs.A

5. A brake shoe comprising an outer back and an inner back, said backs being rigidly secured together and having oppositely disposed ribs which space the backs apart adjacent the ribs, the inner back having openings between the ribs, and a body anchored to the backs and filling saidopenings and the space between the backs. y

6. A brake shoe comprising a shell having a back, an inner back secured rigidly within the shell to the back thereof.v said backs having oppositely disposed longitudinal ribs which space the backs apart adjacent the ribs, the inner back being of less width than the outerback to provide space between the side edges of the inner back and the sides of the shell, the

inner back having openings between the ribs, and a body anchored to said backs, said body enclosing the side edges of the inner back and the openings therein and buttoned on the inner back Within the space between the backs.

7. A brake shoe comprising an outer back and an inner back, one of said backs having ribs which engage the outer back and space the backs apart adjacent the ribs, and a body l@ anchored to said backs and embedding the inner back.

8. A brake shoe comprising an outer back and an inner back, said backs being spaced apart and secured rigidly together, and a body anchored to said backs and embedding the inner back, the outer back having openings therein to receive the body material for forming the guide lugs and the inner back having flanges struck therefrom and projecting through the outer back and forming side facings for said guide lugs.

9. A brake shoe comprising an outer back and an inner back, said backs being secured rigidly together and having oppositely disposed ribs which abut and space the backs apart adjacent the ribs, a body anchored to said backs and embedding the inner back, an attaching lug having depending legs, and said backs having slots to receive said legs, the

inner ends of the legs being bent laterally into locking engagement with the inner back.

WILBUR H. VVINTERS.

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