US1872806A

US1872806A - Brake shoe

Info

Publication number: US1872806A
Application number: US515653A
Authority: US
Inventors: Robert B Pogue
Original assignee: American Brake Shoe and Foundry Co
Current assignee: American Brake Shoe and Foundry Co
Priority date: 1931-02-14
Filing date: 1931-02-14
Publication date: 1932-08-23
Anticipated expiration: 1949-08-23

Description

Aug 23, 1932.

R. B. PoGUE 1,872,806

BBBBBBB OEu Filed Feb. i4, 1951 l Wy Z? la y, J

Patented Aug.r23, 1932 7 y UNITEDSTAIES LammeN PATE-NT o1-FICE ROBERT' E. POCIIE, OE CHICAGO, ILLINOIS, AssIGNOR :ro '1j-IIE AMERICANl BRAKE sIiOE s AND EOUNDRY COMPANY, or WILMINGTON, DELAWARE, A CORPORATION OE :DELA- vWARE A Y BRAKE SHOE VApplication inea vIetruary 14, 1931. serial No. 515,653.l

I Y rIhis invention relates to improvements in .brake shoes and it has for its object to provide a more eicient anchorage for the end lugs of the shoe with the reeniorcing steel back. y Y v It has beencustomary for sometime to vcastthe body of the shoe upon a steel back lwhich has a flat arcuate inner face and is provided with openings to receive the body metal for anchoring the 'body and its 'end '.lugs'to the back, one important purpose of the back'being to hold the parts of the body together in case of fracture so that the shoe may be continued in use. It the body wea-rs down evenly close tothe steel back, one or both of the'end lugs may be broken loose and fall away from the shoe because of insufiicient anchorage of the lug to the steel back, and the same thing may happen if the shoe wears unevenly close to one or the other end.

' The object of the invention is to improve the anchorage of the end lugs with the steel back of the shoe so that the end lugs will still be anchored to the back if the body is worn down to the inner face of the back beneath the end lugs.

In the accompanying drawing illustrating a selected embodiment of the invention Fig. 1 is a side view of a flanged shoe embodying the invention, one end thereof being shown in section on line 1-1 of Fig. 2.

Fig. 2 is a plan view of the back of the shoe.

Fig. 3 is a transverse sectional view on the line 3 3 of Fig. 2.

Figs. 1 and 5 are detail sectional views showing other forms of the invention.

The shoe selected for illustrating the invention is a flanged shoe comprising a cast iron body 6, a steel back 7 and a steel strap attaching lug8. The back is provided with openings 9 to receive the body metal for anchoring the body to the back. The body is cast on the back and it may be provided with inserts 10 suitably disposed therein, as desired. At the ends of the shoe the body is provided with the usual end lugs 11 and the ends of the back project through the body close to the ends thereof and beneath the end lugs.

One or more openings 12 are provided inthe end portions 0I the back to receive thebody metal for anchoring the ends of the body and its end lugs to the back. In this particular type of shoe andendsof the back are `cut away and the ends of the body are dished or cut away,'as at 13, at the flanged side of the shoe. If the body of the shoe` is worn away completely tothe steel back beneath the end lugs, there will be nothing to lanchor the endlugs to the back except the metal within the openings 12 and this will not 'be 'sufficient' to retain the end lugs inl place for anylength of vide a more secure anchorage OI' the end` lugs to the steel back and I accomplish this in'Figs. 1-3 by bending or upsetting the back at 14 between' the openings '12 to form recesses-in* thev inner side of the back between said openings to receive the body metal at 15.l The body metal in the recesses is integrallyV connected with the end lugs .and the metal in the openings 12, it provides a more' secure anchorage for the end lugs with the'steel back, .and it will still hold the end lugs on the back after the body reaches its limit of wear tothe steel back. This may also beaccomplished by OE- settingfthe end portionsof the back asshown at 16, Fig. 4C, or by inclining outwardly the end portions ofv the back as shown at 17 Fig. 5, the purpose in all cases being to connect the lugs by the body metal beneath the back which will endure after the body wears down time. Itis the obj ect of my invention to proto the back. The bends in Fig. 1 and the offsetting in Fig. land the inclining in Fig.` 5 are sufficient to show that the end lugs will be connected beneath the back after the body has worn down to the back to hold the end lugs on the back, but if desired the recesses may be larger and the oilsetting and inclining may be increased to correspondingly increase the metal in these connections. In the constructions O Figs. 4 and 5, the ends of the back should preferably not extend to thefsurface of the body or of thel endlugs, but should be embedded therein sufliciently to provide the usual connection between each end l'gand the body beyond the end of the back. In the particular embodiment shown in the drawings, there are three circular openings 12-at` each end of the back but the same results will and to the body as being caston the back because this is familiar practice in the brakeV shoe art, but the invention is not restricted to a back of any particular kind except for they distortion thereof to effect the purposes of my invention, and the body may be made of other materials than cast iron. The invention may be embodied in brake shoes for railway cars and for friction brakes of any kind to which it is or may be adapted.

kI have shown the invention in particular embodiments but I do not limit myself thereto and reserve the right to make any changes inthe form, construction and arrangement of parts to accomplish the same or equivalent results and within the scope of the following claims. v

, I claim: d p A v. l. A brake shoe comprising av bod end- Vlugs, and aback embedded in the Vbo y and said lugs, the end portions of the back having openings therein receiving metalof the body and integrally connecting the lugs therewith, said end portions of the back being distorted between said openings to receive body metal which is integrally connected with the lugs and forms anchors for the lugs on the back vwhen the body is worn down to the underside of the back. d

2. A brake shoe comprising a body, end

v part of thev back.

of the back to receive metal of the body which is integrally connected with the body metal in p said openings and forms anchors for the lugs with the back after the body has worn down to the underside of said intermediate part of the back. y l

5. A brakey shoe` comprising a body, end

lugs, and a back embedded in the body and said lugs, the end portions of the back having openings therein receiving metal of the body` and integrally connecting the lugs therewith, said end portions of the back being bodily bent outwardly at said openings and with respectto the intermediate part of the back so that metal of the body beneath said bent end portions willv anchor the end lugs to the back after the body has worn down to the underside of said intermediate ROBERT B. Poetin.

lugs, and a back embedded in the body and y said lugs, the end portions of the back having openings therein receiving metal of the body and integrally connecting the lugs therewith, said, end portions of the backbeing bent outwardly between said openings to form recesses on the underside of the back to receive body metal which is integrally connectedwith the lugs and forms anchors for the lugs on the back when the body isworn down to the inner face of the distorted ends of the back;

3. A brake shoe comprising a body, end

glugs, and a back embedded in the body and said lugs, the end portions of the vback having openings therein receiving metal of the body and integrally connecting the lugs therewith, said end portions ofthe back being bent outward between the openings to form transversely extending recesses for ,receiving metal of the body which is integrally connected with the'body vmetal in said