Wear indicator

Details Wear indicator Wear indicator

2005-08-23

2005-08-23

Mullins, Burton (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S06800R, C310S239000, C310S242000

Reexamination Certificate

active

06933650

ABSTRACT:
The present invention relates to a wear indicator for a motor carbon brush which includes a housing, carbon brushes, an elastic element, a circuit board with an alarm indicator light and an electric probe disposed on the circuit board. The electric probe is connected to the alarm indicator light and the carbon brush has a contact portion on its outer surface which when the brush is worn and need to be changed is electrically connected to the alarm indicator light through the electrical probe to turn the alarm indicator light on. The present invention is simple to manufacture and gives a indication of wear.

REFERENCES:
patent: 3924147 (1975-12-01), Tarnow et al.
patent: 4024525 (1977-05-01), Baumgartner et al.
patent: 4344009 (1982-08-01), Reynolds
patent: 5509625 (1996-04-01), Oullette et al.
patent: 58009552 (1983-01-01), None
patent: 61142943 (1986-06-01), None
patent: 10257735 (1998-09-01), None

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