US1935357A - Method of making a brake shoe - Google Patents

Description

R. A. GoEPFRlcH 1,935,357

METHOD OF MAKING A BRAKE SHOE A Original Filed March 15. 1928 Nov. `14, 19,33.

ATTORNEY Patented Nov. 14, 1933 UNITED rss isv

signor to Bendix Aviation Corporation,

South Bend, Ind., a corporation oi Delaware @riginal application March 15, 1928, Serial No..

Divided and this application .lune 15,

i932. serai No. 611,459

s chime. (ci. ,ze-i521) This invention relates to the method of making brake shoes, and is illustrated as embodied in the manufacture of a rigid curved shoe for an internal expanding automobile brake. An object of the invention is to provide greater rigidity for a shoe of this character, by forming or displacing portions of the stiening web crosswise oi the shoe, preferably in such a'manner that the web undulates crosswise of the shoe. -The shoe may be formed of an element having a straight web which is integral with the rim, and preferably also integral with an inner reinforcing flange, at intervals which alternate with portions that are structurally separate from the rim and flange and which are displaced crosswise of the shoe and then, if desired, welded or otherwise secured again to the rim and flange.

'Other objects and features of the invention, including novel constructions at the ends of the shoe and various desirable details oi construction, will be apparent from the following description of two illustrative embodiments shown in the accompanying drawing, in which:

Figure 1 is a .curved section, lengthwise of the shoe, on the line' 1-1 of Figure 2, showing the undulation of the web A Figure 2 is a section through the shoe on the line 2-2 of Figure l;

Figures 3 and 4 are viewscorresponding respectively to Figures 1 and 2, but showing a different shoe;

Figure 5 is a side elevation of the shoe of Figures 3 and 4; and

Figure 6 is a view of the inner side of the shoe of Figures Band d.

The illustrated shoes are formed of elements, either formed in the curved shape shown or bent from straight members, and each having an outer rim 10 (to which the brake lining 12 is riveted or otherwise secured) and preferably also aninner reinforcing flange 14. The rim and ange are connected by a web 16 (Figs. 1 and 2) or 18 (Figs. 3 6) having at intervals portions which are integral with the rim and ange, these portions of web 16 being along one side oi the shoe, while the corresponding portions of web 18 are between the side edges of the shoe substantially in the central plane of the shoe.

Between the integrally-connected portions of the webs 16 and 18 are structurally-separate portions Z0 and 22, preferably formed by cutting or otherwise severing the web attop and bottom..

these portions being displaced crosswise oi the shoe and if desired again secured to the rim and ange by welds 2t. The portions 22 oi web 18 are shown alternately displaced in opposite directions. In either case, the result is a web undulating crosswise of the shoe. V

At the anchored end of the shoe, portions 26' and 28 of the rim and ange are bent smoothly around and welded to the end of the web, which is here formed with an opening ior an anchor pivot 30. As best appears in Figure d, the web 18 is preferably at one side or" the shoe at its an.n chored end, so that it will come next the baclring plate of the brake and permit the use oi a very short and rigid anchor pin.

At the other end of the shoe the web 1S is preferably in the central plane of the shoe, and portions 32 and 34 may be folded across and welded to this end of the web to form a support for a hardened cam or wear plate 36 secured thereto. l

While two illustrative embodiments have been described in detail, it is not my intentionto limit the scope of the invention to the method of malring those particular embodiments, or otherwise than by the terms of the appended claims.

This application is a division of my copending application, A:Serial No. 261,714, filed March 15, 1928, entitled Brake shoes.

I claim:

1. That method of making a brake shoe which comprises forming an element with a rim and a stiiening web integral with the rim. at intervals alternating with intervals in which its' entire width is structurally separate from the rim, and

then displacing the structurally separate parts of the web crosswise of the rim to give support to said rim over a broad area.

2. That method of making a brake shoe which comprises forming an element with a rim and a spaced reinforcing flange and with a st'ifening web integral with the rimandflange at intervals alternating with intervals in which its entire width is structurally separate from the rim and iiange, and then displacing the structurally separate parts of the web crosswise of the rim and ange to give support to said rim and flange over their entire width.

3. That method of making a brake shoe which comprises forming an element with a rim and a stiening webintegral with the rim at intervals alternating with intervals in which it is struc turally separate from the rim, and then displacing the structurally separate parts ofthe web crosswise of the rim, and nally welding the displaced parts of the web to the rim.

d. That method of making a vbrake shoe which comprises formingan element with a rim and a.

tervals from the remainder of the structural shape and stretching and displacing the web laterally at its severed sections to increase the breadth of support for the remainder of the structural shape.

6. The method of making a brake shoe from a structural shape having a web, which comprises severing sections of the web along its edge at intervals from the remainder of the structural` shape, stretching and displacing the web laterally at its severed sections and securing said displaced web sections to the remainder of the structural shape.

RUDOLPH A. GOEPFRICH.

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