US PATENT SUBCLASS 323 / 339
.~.~.~ Including an electronic tube or a three or more terminal semiconductive device in control circuit

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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}
329  DF  .~.~ Controllably saturable {5}
339.~.~.~ Including an electronic tube or a three or more terminal semiconductive device in control circuit

DEFINITION

Classification: 323/339

Including an electronic tube or a three or more terminal semiconductive device in control circuit:

(under subclass 329) Subject matter wherein the control circuit includes at least one electronic tube or three or more terminal semiconductive device connected to the control winding of the transformer.

SEE OR SEARCH THIS CLASS, SUBCLASS:

254, for output level responsive devices of this type.