US PATENT SUBCLASS 318 / 534
.~.~ Plural, diverse or diversely connected or controlled field circuit impedances

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

521  DF  FIELD OR SECONDARY CIRCUIT CONTROL {6}
533  DF  .~ Impedance-controlled {1}
534.~.~ Plural, diverse or diversely connected or controlled field circuit impedances {1}
535  DF  .~.~.~> Wheatstone bridge

DEFINITION

Classification: 318/534

(under subclass 533) Subject matter in which two or more impedances are provided in the field circuit; one or more of which are structurally different or are differently controlled or controlled by means which are different with respect to each other, than one or more others of the impedances.

SEE OR SEARCH THIS CLASS, SUBCLASS:

509, and the subclasses specified in Notes thereto, for motor systems having the armature or primary circuit controlled by means of plural impedance devices.

SEE OR SEARCH CLASS

322, Electricity: Single Generator Systems,

76, for generator systems having the generator field circuit controlled by means of plural impedances.

323, Electricity: Power Supply or Regulation Systems, 220, 354 for miscellaneous load control by means of impedance devices including plural impedances.