Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1982-05-05
1983-10-11
Miller, J. D.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 45, 310242, 310246, H02K 1300
Patent
active
044095082
ABSTRACT:
A brush holder for dynamo-electric machine has the following parts: a brush making sliding contact with the surface of a rotary collector; a stationary holder part fixed to the stationary part of the dynamo-electric machine opposite to the collector; and a detachable holder part detachably secured to the stationary holder part and holding the brush when separated from the stationary holder part, the detachable holder part being provided with a retainer that clamps the brush when the detachable holder part is separated from the stationary holder part and unclamps the brush when it is attached to the stationary holder part, the brush clamping portion and the portion of the retainer therearound being coated with a coating film of a material having a friction coefficient smaller than the material of the retainer. This arrangement obviates various unfavorable phenomena such as jumping of the brush, sparking on the sliding surface, cracking in the brush and so forth.
REFERENCES:
patent: 3521102 (1970-07-01), Sen
patent: 3863085 (1975-01-01), Shapiro et al.
patent: 3902088 (1975-08-01), Guglielmo
patent: 3983432 (1976-09-01), Rankin
Motegi Shoji
Ooki Norihiro
Takahashi Noriyoshi
Takikawa Yoshio
Wachi Yasuyuki
Hitachi , Ltd.
Hitachi Chemical Company Ltd.
Miller J. D.
Rebsch D. L.
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