Brush gear for an electric motor

Details Brush gear for an electric motor Brush gear for an electric motor

1996-10-04

1998-09-29

Dougherty, Thomas M.

Electrical generator or motor structure

Dynamoelectric

Rotary

310239, 310251, H02K 1310

Patent

active

058149155

ABSTRACT:
A miniature electric motor having a wound rotor uses brush gear 20 comprising strips 23 formed from flexible printed circuit board material 22 having a conductive layer 24 and a supporting layer 25. The conductive layer 24 is electrically connected to motor terminals 19 and to a contact portion 26 arranged for making sliding contact with a commutator of the motor. The contact portion 26 of the brush 21 may be coated with a precious metal for contact or corrosion resistance requirements. The backing material 25, preferably polyimide, is chosen of a desired thickness to provide strength, resilience and vibration damping characteristics while remaining flexible.

REFERENCES:
patent: 3171997 (1965-03-01), Hammer
patent: 3433989 (1969-03-01), Leavitt
patent: 3736396 (1973-05-01), Siegel
patent: 4396850 (1983-08-01), Herr
Patent Abstracts of Japan, vol. 95, No. 010 & JP 07 264813 A, Oct. 13, 1995.
Patent Abstract of Japan, vol. 4, No. 112, (E-021) Aug. 12, 1980, JP-A-55 068847, May 23, 1980.
IBM Technical Disclosure Bulletin, "Cam Position Deterector Disk", vol. 25, No. 4, Sep. 1982, New York.

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