US PATENT SUBCLASS 310 / 220
.~.~.~ Spark-reduction

Current as of: June, 1999
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310 /   HD   ELECTRICAL GENERATOR OR MOTOR STRUCTURE

10  DF  DYNAMOELECTRIC {5}
40 R  DF  .~ Rotary {28}
219  DF  .~.~ Current collectors {7}
220.~.~.~ Spark-reduction {3}
221  DF  .~.~.~.~> Arc extinguishers
222  DF  .~.~.~.~> Spark-neutralizing current
223  DF  .~.~.~.~> Flux compensators {3}

DEFINITION

Classification: 310/220

(under subclass 219) Subject matter relating to the reduction of sparking at the current collector.

SEE OR SEARCH CLASS

318, Electricity: Motive Power Systems,

439, for electric motor systems having means to control the commutation.