Electrical brush having a wear indicator

Details Electrical brush having a wear indicator Electrical brush having a wear indicator

1996-03-19

1998-04-14

LaBalle, Clayton E.

Electrical generator or motor structure

Dynamoelectric

Rotary

310251, 310252, 310245, H02K 1300

Patent

active

057396191

ABSTRACT:
An electrical brush having a wear indicator in the form of a marking substance within the brush which removes a film from a rotating collector surface of an electrical device just prior to the brush becoming worn to its minimum length. The removal of the film leaves a bright streak on the collector surface, and provides a visual indication that the brush is in need of replacement.

REFERENCES:
patent: 3392295 (1968-07-01), Sebok
patent: 4034249 (1977-07-01), Avery
patent: 4075524 (1978-02-01), Bradshaw et al.
patent: 4316186 (1982-02-01), Purdy et al.
patent: 4536670 (1985-08-01), Mayer

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