US PATENT SUBCLASS 318 / 655
.~.~.~.~ With synchro differential

Current as of: June, 1999
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318 /   HD   ELECTRICITY: MOTIVE POWER SYSTEMS

560  DF  POSITIONAL SERVO SYSTEMS (E.G., SERVOMECHANISMS) {23}
638  DF  .~ With particular "error-detecting" means {13}
652  DF  .~.~ With particular position measuring instruments {7}
654  DF  .~.~.~ Synchro control transmitter-transformer systems {1}
655.~.~.~.~ With synchro differential

DEFINITION

Classification: 318/655

(under subclass 654) Subject matter in which a differential synchro circuit is used. A differential synchro is a synchro in which both the stator and the rotor are relatively rotatable with respect to fixed reference, and the angular positional data obtained from such a device in the sum or difference of the two rotations.