US PATENT SUBCLASS 318 / 531
.~ Variable length or tapped field winding

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

521  DF  FIELD OR SECONDARY CIRCUIT CONTROL {6}
531.~ Variable length or tapped field winding

DEFINITION

Classification: 318/531

(under subclass 521) Subject matter in which means are provided for tapping or otherwise varying the active length of a field winding.

SEE OR SEARCH THIS CLASS, SUBCLASS:

523, for motor systems having plural field windings where the windings are selectively or partially energized.

SEE OR SEARCH CLASS

322, Electricity: Single Generator Systems,

71, for generator control systems in which means are provided for tapping or otherwise varying the effective length of the generator field winding.