Worn brush indicator

Details Worn brush indicator Worn brush indicator

1979-12-10

1982-08-10

Brigance, Gerald L.

Communications: electrical

Condition responsive indicating system

Specific condition

310242, G08B 2100

Patent

active

043440720

ABSTRACT:
A worn brush indicator for machinery, e.g., a motor generator, wherein a carbon brush is in engagement with a moving contactor, e.g., a commutator or slip ring. The brush is made with an elongated cavity, and an insulated conductor is placed in the cavity. When the brush is worn to a point where the cavity is exposed and the insulating is worn away, the conductive member, having a carbon tip, engages the commutator, and an alarm circuit connected between the conductive member and the brush proper signals a worn brush condition.

REFERENCES:
patent: 2590796 (1952-03-01), Schaffer
patent: 2691114 (1954-10-01), Lykins
patent: 2814684 (1957-11-01), Pascale
patent: 3439206 (1969-04-01), Grannells
patent: 3523288 (1970-08-01), Thompson
patent: 3681635 (1972-08-01), Bayer
patent: 3898492 (1975-08-01), Vassos et al.
patent: 4024525 (1977-05-01), Baumgartner
patent: 4121207 (1978-10-01), Jones
patent: 4172988 (1979-10-01), Lowther

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