US1130680A - Brake-shoe. - Google Patents

Description

J. s. THOMPSON. BRAKE SHOE. APPLICATION YILED JUNE 1'], 1914.

v atented M3122, 1815.

- v inzenwri by 2 QQMQ ZM- JAMES s/EEELBS THOMPSON, F FELHAM, NEW YORK BRAKE-SHOE.

' To all whomit may concern."

Be itlrnown that l, JAMns S. TnoMPson; a

citizen of the United filta-tes, and a resident of Pclham, in the county of Westchester and State of New York, have made and invented certain new and useful Improvements in Brake-Shoes, of which the following is a specification.

My invention relates to an improvement in brake shoes, andv more particularly to v such as have the wearing face of somewhat greater length than the back of the shoe, the ends being prolonged and chilled in such a way as to afford a constantly and practically uniform wearing surface throughout the life of the sh0e, that portion of the wearing face between the chilled ends being of soft cast iron, the prolongations on the ends of the shoe affording a place for chilling without hardening any portion between the ends. This form of shoe has heretofore met with several objections, the. principal one being that the chilled metal, being extremely brittle, is apt to break away or'part from the unchilled portion.

The object of my invention is to overcome this objection, and to so construct the shoe that the chilled ends will be firmly bound or bonded to the unchilled body portion, and thereby to secure to the shoe all the advantages arising from an unchilled-cast iron shoe having chilled ends, and with this and other ends in view, the invention consists in certain novel features of construction and combinations of parts as will be hereinafter fully described and pointed out in the claims.

In the accompanying 'drawings, Figur e 1 is a plan view of a shoe constructed inaccordance with my invention. Fig.- 2 is a view in sid'e'elevation, oneend thereof being shown in section in order to show the holiding materialembedded partly in the curls,-

and partly in the body, of the shoe. Fig. 3 is a bottom plan View of the shoe.- Fig. i is a sectional view taken through the line 44 of Fig. 2; and Fig. 5 a similar view taken on the line 55 of Fig. 2 looking in the direction as indicated by the arrow.

Referring to the drawings, it will be seen that the body 6 of the shoe is somewhat longer on its wearing face 7 than on the back 8, the ends 9' of the shoe being somewhat prolonged-for the purpose of lending to the shoe the usual area or surface of un- Patented lies .2, 19th. leis. semineeeasaef I .chilled cast iron with the additipnal area,- or surface of chilled metal. I

and in the ends thereof, of layers, wire mesh, enforcing reticulated metal 10, and of such width as to extend body of the shoe, from that portion 11. of. the end whicb 'is chilled into the body 6 of unchilled'emtel, the idea being to have this bonding 0, bind- I place a plurality or a bundle of expanded metal,

ing reticulated metal 10|to extend from the chilled into the unch'illed portions of the Into the mold in which the shoe is cast,

or other binding, bonding orre-g,

practically across the. and in length to ext/end shoe, to avoid the danger of the two metals cracking and separating. I have learned from experience however, that it is desirable, if not absolutely essential, to first treat the reinforcement or bonding metal 10 with a heat resisting material, such, for instance,

as is described in the patents granted to, Wesley G. Nichols, Nos. 938,688 and 938,689, and dated November 2, l909ffor otherwise the metal constituting the ends 11 of the shoe, and incontact with which the chilling 1' blocks, are placed, cools or chills so rapidly, by reason of the chilling blocks and-the cold metal constituting the bonding material. 10, as to leave spaces between the latter-and said chilled metal, while that portion of the insert which exte ds into the unchilled portion 6 is burned ordestroyed, cousin the formation of blow-holes and resulting Jinan impractical, or worthless shoe. By first treating, however, the insert, of reticulated metal with'a heat resisting material, this objection is overcome, the chilled, metal completely surrounding and embedding the in: sert, while that portion of the latter extend-. ing-into the unchilled portion of the metal remains intact, thereby forming a strong.

bond between the chilled and unchilled portions of the shoe. While I have shown and described several layers of this mesh or expanded metalembedded in the end of the shoe,'l of course do not limit myself to they particular form or ln'nd of mesh, nor" to the quantity or manner of distribution of the same, so long as such is completely embedded in both the chilled and unchilled portions of the metal. N or do 1 limit my claims to the particularway or manner, or to the extent of chilling the ends of the shoe, as

, the chilling blocks, largcr or smaller in size,

'limged #3511 ilgwl 43m,

may lee placetl upen he en is 0f the shoe, 0? upon back of shoe adjacent the ends, as (lash-06., only to fulfil the requiremnis of": ihi mention, l0 chill zha p'mlonged ends of: the snoe, and 0 biml the same with the unchilleel portions.

l; A. bmla shoe comprising a body portion 03. unchillecl melal and pro *l-iled with prolcngcll ends of chilled metal, and a retlc-- ulaiecl metal lxisu'rt embedded. in dye proand extending Sl'lOYl; (list-3110a into l lac, unchilled met I of the bed v' whereby t0 tie or bind the chilled and unchillezl metals together.

2'. A brams shoe Comprising a bmly pmlion 0f unchllle metal and having 'pr0- lamgecl-emls of cl'nllcrl metal, and. an insert @f exggianclecl mm] GD'lbGLlilQll in the prolonged chilled ends and extending a ShOZlJ unskilled metal 435 the securely lmml or the. ends ante the nnclnllenl JAMES itll'rllELDS THOMPSON.

'll itncssesz ANNA. V. WALSH, GEORGE E. C001

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