Brush wear monitor

Details Brush wear monitor Brush wear monitor

1983-10-03

1987-01-13

Rowland, James L.

Communications: electrical

Condition responsive indicating system

Specific condition

340691, 340635, 340679, 200 6141, 310245, G08B 2100

Patent

active

046367780

ABSTRACT:
A brush wear monitor system for dynamoelectric machines includes a sensor imbedded in a brush to provide a signal indicating a predetermined amount of brush wear. The brush wear signal is provided through an isolation network to an indicator circuit. The indicator circuit includes a first indicating lamp which is illuminated in the absence of a signal from the brush wear sensor to indicate normal operation and a second indicator lamp which is illuminated only in response to receipt of a brush wear signal from the sensor. Upon receipt of a signal the first indicator lamp is extinguished and the second indicator lamp is illuminated. A manually operated test switch is provided to check the operation of the indicator circuit.

REFERENCES:
patent: 2762035 (1956-09-01), Triman
patent: 3409873 (1968-11-01), Duffy
patent: 3452347 (1969-06-01), Stimson
patent: 3523288 (1970-08-01), Thompson
patent: 4169357 (1979-10-01), Kelley
patent: 4333095 (1982-06-01), Silva
patent: 4344009 (1982-08-01), Reynolds
patent: 4390870 (1983-06-01), Michael

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