Method of making a commutator for small-sized electric motor

Details Method of making a commutator for small-sized electric motor Method of making a commutator for small-sized electric motor

1977-11-23

1980-02-19

Hall, Carl E.

Metal working

Method of mechanical manufacture

Electrical device making

310 43, 310235, 310236, H01R 4308

Patent

active

041887131

ABSTRACT:
A metal tube with outwardly bent risers for terminals is filled with a body of plastic resin which hardens in place. Then the tube is cut through, chordwise, a plurality of times to provide a plurality of segments. An extended, base portion of the plastic resin body through which the risers extend radially outwardly continues to hold the cylindrical disposition of the metal segments, with gaps maintained therebetween. A shaft is fitted coaxially in the base portion of the plastic resin body and extends through a larger diameter central bore of the body, centrally of the commutator segments. The gaps communicate with the annular space between this bore and the shaft, for cleaning out of particulate debris by centrifugal force.

REFERENCES:
patent: 3662240 (1972-05-01), Yukisada et al.
patent: 3717928 (1973-02-01), Yamaguchi
patent: 3812572 (1974-05-01), Yamaguchi

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