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Nadezhda Vasilievna Kalinina

Jury Nikolaevich Vasiliev

Georgy Nikolaevich Fridman

Anatoly Alexandrovich Kozyrev

Abram Samoilovich Fialkov

Olga Borisovna Kazakova

Yakov Gilievich Davidovich

Evgeny Mikhailovich Kozlov

Valentina Mikhailovna Emelyanova

Anatoly Alexeevich Boiko

Nikolai Sergeevich Voronin

Roza Petrovna Berlizova

Alexandr Iudovich Sokolovsky

Igor Vyacheslavovich Yartsev

Andrei Nikolaevich Gusev

Alexei Gavrilovich Shirokov

Roza Petrovna Batyreva

Valery Alexeevich Fugol

Abram Yakovlevich Gluskin

Abram Yakovlevich Gluskin, Deceased

By Boris Gluskin, Administrator

Vladimir Petrovich Sosedov

Alexandr Andreevich Tarasov

A carbon graphite material for brushes of electric machines contains ultraphosphates of metals which are sealed by film-forming polymers. The material is impregnated in a mixture of a metal chloride with an aqueous solution of orthophosphoric acid and heat treated to form ultraphosphates of metals evenly distributed throughout the entire volume of the material. The material is then impregnated in a film-forming polymer resin solution, which enhances the contact characteristics of the material, and again heat treated till the resin is fully polymerized. As a result, the ultraphosphates which have formed earlier in the material, are sealed, thus becoming hydrolytically stable; at the same time, the contact characteristics of the material improve generally, the material becoming highly wear resistant, capable of operating within a wide range of temperatures, pressures and humidity.

Carbon-graphite material for brushes of electric machines and method for

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.

Carbon-graphite brushes for electric machines and method for

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Moscow, Russia

Nadezhda Vasilievna Kalinina