US PATENT SUBCLASS 323 / 340
.~.~ Having a variable length winding (e.g., tapped) as the final control device

Current as of: June, 1999
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323 /   HD   ELECTRICITY: POWER SUPPLY OR REGULATION SYSTEMS

318  DF  EXTERNAL OR OPERATOR CONTROLLED {5}
328  DF  .~ Using a transformer or inductor as the final control device {6}
340.~.~ Having a variable length winding (e.g., tapped) as the final control device {3}
341  DF  .~.~.~> With motor driven tap switch
342  DF  .~.~.~> With other transformer
343  DF  .~.~.~> With a three or more terminal semiconductive device

DEFINITION

Classification: 323/340

Having a variable length winding (e.g., tapped) as the final control device:

(under subclass 328) Subject matter wherein at least one of the windings of the transformer includes at least one contact intermediate the end contacts of the winding and means is provided to select between the several contacts.

SEE OR SEARCH THIS CLASS, SUBCLASS:

255, for output level responsive devices of this type.

SEE OR SEARCH CLASS

200, Electricity: Circuit Makers and Breakers,

11, for tap changing switches, per se.

336, Inductor Devices, 137, for transformers with tap changing switches.