US PATENT SUBCLASS 318 / 523
.~ Plural, diverse or diversely connected or controlled field windings

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

521  DF  FIELD OR SECONDARY CIRCUIT CONTROL {6}
523.~ Plural, diverse or diversely connected or controlled field windings {6}
524  DF  .~.~> Convertible number-of-poles type (e.g., 4-pole or 6-pole)
525  DF  .~.~> Differentially wound or energized windings
526  DF  .~.~> Series-parallel
527  DF  .~.~> Series field winding
528  DF  .~.~> With means to short circuit a field winding
529  DF  .~.~> Selectively energized

DEFINITION

Classification: 318/523

(under subclass 521) Subject matter in which the motor is provided with two or more field-producing windings one or more of which are different structurally, connected differently, or controlled differently or by different means, than one or more others of the motors.

SEE OR SEARCH THIS CLASS, SUBCLASS:

252, for this subject matter in series-motor systems.

297, for this subject matter in motor reversing systems.

495, and the subclasses specified in the Notes thereto, for motor systems where the motor has plural armature or primary windings.

700, for this subject matter in synchronous motors systems.

818, for this subject matter in induction motors systems. SEE OR SEARCH CLASS

322, Electricity: Single Generator Systems,

63, for generator systems where the generator has plural field windings.