Switch for a brush wear recording circuit

Details Switch for a brush wear recording circuit Switch for a brush wear recording circuit

2011-04-12

2011-04-12

Leung, Quyen (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S244000, C310S245000, C310S249000

Reexamination Certificate

active

07923892

ABSTRACT:
A switch for a recording circuit used to determine brush wear of an electrical brush comprises a flag having a first end and a second end defining distal ends of the flag. The flag is mounted on the electrical brush at the first end so as to move in unison with brush wear while being in electrical communication with the electrical brush and has a piercing feature on the second end. The switch further comprises a contact plate arrange relative to the flag so as to bring the flag in contact with the contact plate at a predetermined brush wear and includes an inner conductive core encased by a cover forming an outer layer of the contact plate, wherein the piercing feature is configured to penetrate the cover and to contact the conductive core to cause electrically continuous contact between the flag and the contact plate and close the switch.

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Co-pending U.S. Appl. No. 12/429,664, filed on Apr. 24, 2009 entitled “Switch for a Brush Wear Recording Circuit”.
European Search Report for EP 08155159 mailed Dec. 30, 2008.
Co-pending U.S. Appl. No. 12/429,627, filed Apr. 24, 2009, entitled “Brush wear monitor”.

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