US PATENT SUBCLASS 318 / 767
.~ Primary circuit control

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

727  DF  INDUCTION MOTOR SYSTEMS {12}
767.~ Primary circuit control {9}
768  DF  .~.~> Three phase motor operated from single phase source {1}
770  DF  .~.~> Dual voltage motors
771  DF  .~.~> Delta-wye, plural wye, or plural delta connected primary windings
772  DF  .~.~> Plural speed {1}
778  DF  .~.~> Starting control {3}
798  DF  .~.~> Responsive to motor condition {2}
806  DF  .~.~> Condition responsive
807  DF  .~.~> Frequency control {3}
812  DF  .~.~> Voltage control {3}

DEFINITION

Classification: 318/767

Primary circuit control:

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

SEE OR SEARCH THIS CLASS, SUBCLASS:

494, for miscellaneous motor systems for controlling the armature or primary circuits of the electric motor.

766, for primary and secondary induction motor circuits.