US PATENT SUBCLASS 335 / 244
.~.~.~ Flux phase displacement or varying means

Current as of: June, 1999
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335 /   HD   ELECTRICITY: MAGNETICALLY OPERATED SWITCHES, MAGNETS, AND ELECTROMAGNETS

209  DF  MAGNETS AND ELECTROMAGNETS {10}
220  DF  .~ With magneto-mechanical motive device (e.g., electromagnet with armature) {21}
243  DF  .~.~ Alternating current type {5}
244.~.~.~ Flux phase displacement or varying means {2}
245  DF  .~.~.~.~> Shading coil
246  DF  .~.~.~.~> Plural winding type

DEFINITION

Classification: 335/244

(under subclass 243) Subject matter including means to cause a phase shift between the magnetic flux produced in plural windings or in separate portions of the electromagnet.

(1) Note. This subclass provides for electromagnets having plural windings and means to apply current of different phase to at least two of the plural windings.

(2) Note. This subclass provides for the combination of a two winding electromagnet with a dephasing circuit for converting single phase current into plural phase current.

(3) Note. This subclass provides for electromagnets wherein the electromagnet has sections thereof made of different materials to cause a phase of one section to be delayed with respect to the phase of another section.

SEE OR SEARCH THIS CLASS, SUBCLASS:

247, for alternating current type electromagnets with chatter or noise preventing means which may include phase displacement means.

SEE OR SEARCH CLASS 318, Electricity: Motive Power Systems,

781+, for induction motor system utilizing phase conversion.

363, Electric Power Conversion Systems,

148+, for phase conversion circuits.