Stock material or miscellaneous articles – Self-sustaining carbon mass or layer with impregnant or...
Patent
1975-02-28
1976-12-07
Esposito, Michael F.
Stock material or miscellaneous articles
Self-sustaining carbon mass or layer with impregnant or...
428497, 428500, 428524, 428539, 427113, 427114, 427385R, 310252, 310253, 252511, H01R 3924, H01R 3926
Patent
active
039964086
ABSTRACT:
The present invention relates to heavy-current electrical engineering, and more particularly to carbon-graphite brushes characterized by high wear resistance and low adhesive capacity of the brush dust, said brushes being intended for operation in commutator machines under moderate or heavy commutation conditions at an operating temperature of the sliding contact from 200.degree. to 250.degree. C, and to a method for manufacturing same.
Carbon-graphite brushes for electric machines are made of a material which, after impregnation and heat treatment of the organic impregnation compound contains a dry residue evenly distributed through out the entire bulk volume thereof, the dry residue being a mixture of melamine-glyptal resin with a metal linoleate, in a polymerized state.
A method for manufacturing carbon-graphite brushes, wherein said brushes are impregnated with a compound based on melamine-glyptal resin and a metal linoleate dissolved in toluene or turpentine oil or any other solvent then heat treated at temperature ranging from 120.degree. to 180.degree. C till the impregnant is fully polymerized, the rated content of the dry residue in the brushes being to 0.5-10% by weight with respect to the initial weight of the brush material.
REFERENCES:
patent: 2224724 (1940-12-01), Elsey
patent: 2393816 (1946-01-01), Savage
patent: 3751294 (1973-08-01), Fridman et al.
Hawley, The Condensed Chemical Dictionary, Van Nostrand Reinhold Co., N.Y. (1971), p. 548.
Batyreva Roza Petrovna
Boiko Anatoly Alexeevich
Davidovich Yakov Gilievich
Emelyanova Valentina Mikhailovna
Fialkov Abram Samoilovich
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