Brush and slip ring arrangement of an AC generator

Details Brush and slip ring arrangement of an AC generator Brush and slip ring arrangement of an AC generator

1996-11-15

1998-10-20

Dougherty, Thomas M.

Electrical generator or motor structure

Dynamoelectric

Rotary

310242, 310245, 310248, H02K 1300

Patent

active

058251146

ABSTRACT:
A resilient thin sheet is used for a brush instead of a conventional brush unit which includes coil springs, pig tails and graphite brushes. A slip ring is made of perforated copper which is impregnated with carbon powder. The brush has two arc-shaped arms extending along the circumference of the slip ring and contacting portions disposed at the edges of the arms which are in contact with the peripheral surfaces of the slip ring. Wear resistant members are welded or caulked to the contacting portions to prevent excessive wear of the brush, thereby increasing the life of the brush.

REFERENCES:
patent: 3996408 (1976-12-01), Fridman et al.
patent: 4000430 (1976-12-01), Bely et al.
patent: 4349384 (1982-09-01), Weinhart
patent: 4447752 (1984-05-01), Boyce et al.
patent: 4574215 (1986-03-01), Mabuchi
patent: 5227689 (1993-07-01), Shibuya
patent: 5242511 (1993-09-01), Yokoyama et al.
patent: 5270605 (1993-12-01), Lefrancois et al.
patent: 5304417 (1994-04-01), Zurecki et al.
patent: 5584975 (1996-12-01), Pohto et al.
Patent Abstracts of Japan, Publication No. 57-148559, Sep. 13, 1982, Yasuki, "Miniature Commutator Motor".

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