US1465389A - Unwoven brakeband facing - Google Patents

Description

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WILLIAM C. FISHER, Z5 MXIDDLETOWN, CONNECTICUT, ASSTGNQR T0 RUSSELL MFG. ('10., 0E MIDDLETUWN, ,CONN'ECTICUT, A GORJPOEATTQN.

UN'WOVEN BRAJKEBAND FAGING.

Application filed August 23, 1919. Serial Ho. 319,504,

To all whom it may concern:

Be it known that l, Wmnm1u C. Frsnne,

a citizen of the United States, residing at Middletown, in the count of Middlesex 5 and State of Gonnecticut, have invented a new and useful Improvement in Unwoven Brakeband Facings; and l do hereby declare the following to be a full, clear, and exact description of the same.

My invention relates to animprovement in brakeband tacings, the object being to produce, at a low cost,a lacing of superior durability and eficiency. i

With these ends in view, myzinvention resides in a flexible, unwovenasbestos fiber brakeband facing comprising asbestos fibers combined with ground cork cohered by a superficially applied phenolic condensation product, the bulk of which remains upon the surtaceof the asbestos fibers and ground corlr in the form of a hard skin. Tn carrying out my invention, ll combine, in a pulp, unwoven asbesto fibers with a filler of ground cork, casein and magnesium oxide, or other equivalent materials. In this mixture the asbestos fibers will .predom inate. The materials chosen for the filler are selected with reference to impair-tin elasticity and the required. frictional qua ityto the finished band Such a pulp is I in long lengths in rolls.

and heat to give the material the required density. After such compression, the sheet material is given a surface coating of a phenolic condensation product which solidies and toughens the material, but leaves it suficiently pliable to accommodate it to all the fiexures to which brakebands are subjected in use. Preferably, the application of the described surface coating is accompanied by heat, though this is not essential. The resulting dense, pliant, and tough brakeband facing, although entirely unwoven, has the necessary tensile strength and the required frictional quality.

ll claimz- .As a new article of manufacture, a flexihle unwoven asbestos fiber brakeband tacing, comprising asbestos fibers combined with ground cork, cohered by a superficially applied phenolic condensation product, the bulk of which remains upon the surface of the asbestos fibers and ground cork in the form of a hard shin.

WILLIAM C. FISHER.

- -Witnessz-