Brush wear indicator

Details Brush wear indicator Brush wear indicator

1979-02-26

1981-06-09

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310245, H02K 1300

Patent

active

042726956

ABSTRACT:
A brush wear indicator includes a first contactor and a second contractor movable relative to the first contactor from an open position to a closed position to connect an electrical circuit to an indicator. The second contactor is maintained in the open position against the resiliency of a leaf spring by a coil spring which urges a brush toward a commutator in response to wear to the brush. When the brush wears away to a preselected length the coil spring will have moved to a position at which the leaf spring is free to bias the second contactor to the closed position.

REFERENCES:
patent: 1277394 (1918-09-01), Dean
patent: 2691114 (1954-10-01), Lykins
patent: 3387155 (1968-06-01), Krulls
patent: 3423618 (1969-01-01), Schmid
patent: 3526797 (1970-09-01), Jueschke
patent: 4024525 (1977-05-01), Baumgartner

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