Rough surface commutator for a motor and method of making same

Details Rough surface commutator for a motor and method of making same Rough surface commutator for a motor and method of making same

H - Electricity

01

R

310/119

H01R 39/04 (2006.01) H01R 43/06 (2006.01)

Patent

CA 1173886

ABSTRACT OF THE DISCLOSURE A commutator for a motor and a method of making the same wherein the motor has a stator and a rotor with a rotary shaft and the commutator consists of a plurality of commutator segments embedded in an insulating body, with each of the commutator segments having contact surfaces for engagement with a brush. The contact surface of the commutator being formed with a number of hemispherical shaped impressions so as to form a rough sur- face. A method of manufacturing the commutator comprises embedding a plurality of commutator segments in a body made of insulating material and the step of forming hemispherical impressions in the commutator segments by directing a jet of particles onto the surfaces of the commutator segments with a predetermined pressure so as to provide the desired roughened surface.

382579

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