US PATENT SUBCLASS 318 / 508
.~ Impedance-controlled

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

494  DF  ARMATURE (OR PRIMARY) CIRCUIT CONTROL {9}
508.~ Impedance-controlled {4}
509  DF  .~.~> Plural, diverse or diversely controlled impedances {1}
511  DF  .~.~> Inherently or self-variable impedance
512  DF  .~.~> Inductive reactor controlled {1}
514  DF  .~.~> Resistor-controlled {1}

DEFINITION

Classification: 318/508

(under subclass 494) Subject matter in which means are provided for connecting one or more impedance devices (e.g., resistors, reactors, capacitors) in series and/or in parallel to the armature or primary circuit of an electric motor.

SEE OR SEARCH THIS CLASS, SUBCLASS:

96, for this subject matter in acceleration control systems for plural motors.

133, for this subject matter in reciprocating and oscillating motor systems.

249, for this subject matter in series motors systems.

380, for this subject matter in motor systems for dynamic braking.

505, and subclasses specified in the Notes thereto, for motor systems having space-discharge devices in the armature or primary circuit of the motor. 751, 784, 785, and 794, for impedance-type phase converter or dephasing means for adapting an induction motor for operation from a single phase source of supply.

784, 794, 804, and 814, for this subject matter in induction motor systems.

SEE OR SEARCH CLASS

323, Electricity: Power Supply or Regulation Systems,

364, for circuit control in general by means of impedances.