US PATENT SUBCLASS 340 / 870.34
.~.~.~.~ Self-synchronous type

Current as of: June, 1999
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340 /   HD   COMMUNICATIONS: ELECTRICAL

870.01  DF  CONTINUOUSLY VARIABLE INDICATING (E.G., TELEMETERING) {15}
870.3  DF  .~ With particular transmitter (e.g., piezoelectric, dynamo) {3}
870.31  DF  .~.~ Inductive transmitter {1}
870.32  DF  .~.~.~ Mutual inductance {3}
870.34.~.~.~.~ Self-synchronous type

DEFINITION

Classification: 340/870.34

Self-synchronous type:

(under subclass 870.32) Subject matter in which the mutual inductance has a stator and a rotor which tend to line up magnetically.

(1) Note. This subclass, for example, contains the familiar selsyn systems.

(2) Note. A stator is a nonrotating part of a magnetic structure in an induction motor.

(3) Note. A rotor is a rotating part of a magnetic structure in an induction motor.

SEE OR SEARCH CLASS

318, Electricity: Motive Power Systems,

690, for selsyn-type electric motor systems; and subclasses 654 and 661 for electric motor systems controlled by a selsyn system.