US PATENT SUBCLASS 323 / 306
.~.~ Ferroresonant

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

304  DF  SELF-REGULATING (E.G., NONRETROACTIVE) {2}
305  DF  .~ Using a transformer or inductor as the final control device {2}
306.~.~ Ferroresonant {2}
307  DF  .~.~.~> With plural cores
308  DF  .~.~.~> With core having an air gap or magnetic shunt {1}

DEFINITION

Classification: 323/306

Ferroresonant:

(under subclass 305) Subject matter wherein the transformer is associated with elements which causes it to resonate.

(1) Note. A ferroresonant transformer usually includes a saturable core and a capacitor (usually termed a ferrocapacitor) connected to one of the windings thereof.

(2) Note. Also included in this subclass are parametric transformers.

SEE OR SEARCH THIS CLASS, SUBCLASS:

248, for output level responsive systems using ferroresonant transformers.