US PATENT SUBCLASS 318 / 818
.~ Secondary circuit control

Current as of: June, 1999
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318 /   HD   ELECTRICITY: MOTIVE POWER SYSTEMS

727  DF  INDUCTION MOTOR SYSTEMS {12}
818.~ Secondary circuit control {3}
819  DF  .~.~> Open secondary member or portion thereof with means to open or close the circuit thereto
820  DF  .~.~> Closed secondary member or member portion with means to change electrical characteristics thereof
821  DF  .~.~> Impedance control of secondary circuit {2}

DEFINITION

Classification: 318/818

Secondary circuit control:

(under subclass 727) Subject matter wherein the system to supply and or control the motor includes a circuit connected to the secondary member of the motor.

SEE OR SEARCH THIS CLASS, SUBCLASS:

44, for plural induction motor systems having synchronizing interconnections between motor secondaries.

49, for an induction motor having an electric motor connected to the secondary circuit (i.e., connected in tandem) of the induction motor.

521+, and the subclasses specified in the search notes thereto for miscellaneous motor systems having secondary circuit control of the motor.

729, for power factor control in the primary or secondary circuit of an induction motor.

731+, for primary and secondary induction motor circuits having a voltage source connected to the motor secondary.

766, for primary and secondary induction motor circuits.