US PATENT SUBCLASS 323 / 255
.~.~ Having a variable length winding (e.g., tapped) as the final control device

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

234  DF  OUTPUT LEVEL RESPONSIVE {6}
247  DF  .~ Using a transformer or inductor as the final control device {5}
255.~.~ Having a variable length winding (e.g., tapped) as the final control device {2}
256  DF  .~.~.~> With motor driven tap switch {1}
258  DF  .~.~.~> With electronic tube or a three or more terminal semiconductive device as tap switch

DEFINITION

Classification: 323/255

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

(under subclass 247) 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:

340, for external or operator controlled 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.