Spring mounted carbon brush wear indicator

Details Spring mounted carbon brush wear indicator Spring mounted carbon brush wear indicator

1990-01-25

1990-12-11

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

116208, 116278, 310240, H01R 3958, H02K 1300

Patent

active

049773453

ABSTRACT:
Apparatus for visually indicating a worn brush condition for carbon brushes arranged in a gang-type brush holder. A strip of red Teflon tape, or other distinctive marking, is positioned on the linear spring having a coiled top portion which biases the brush into contact with the collector ring. As the brush wears down, the marking on the spring becomes visible as the spring coils more and more. The tape is positioned on the spring such that, when the exposed top portion of the spring shows completely red (i.e., the color of the marking), it is indicated to the operator that a worn brush is to be replaced.

REFERENCES:
patent: 2840732 (1958-06-01), Nottelmann et al.
patent: 3484939 (1969-12-01), Perry
patent: 3512499 (1970-06-01), Runde et al.
patent: 4338538 (1982-07-01), Major
patent: 4344008 (1982-08-01), Major
patent: 4344009 (1982-08-01), Reynolds
patent: 4348608 (1982-09-01), Michael
patent: 4488078 (1984-12-01), Orton
patent: 4513495 (1985-04-01), Kimberlin
patent: 4723084 (1988-02-01), Reynolds
patent: 4739208 (1988-04-01), Kimberlin
patent: 4743787 (1988-05-01), Bunner

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