Brush wear indicator

Details Brush wear indicator Brush wear indicator

1982-04-23

1985-07-09

Levy, Stewart J.

Communications: electrical

Condition responsive indicating system

Specific condition

361179, 361205, G08B 2100

Patent

active

045285578

ABSTRACT:
A motor brush wear indicator includes a probe embedded in a brush and connected in the primary circuit of a transformer for completing the secondary circuit when the brush has worn to a predetermined degree. An oscilator is coupled to the secondary of the transformer which in turn is connected to the gate of an SCR for providing a gate signal when the primary circuit is completed. A relay is connected to the anode-cathode circuit of the SCR for operating an indicating device when the SCR becomes conductive.

REFERENCES:
patent: 3535615 (1970-10-01), Howell et al.
patent: 4024525 (1977-05-01), Baumgartner et al.
patent: 4390870 (1983-06-01), Michael

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