(under subclass 592) Subject matter in which the position error detectors for each mode are synchros. A synchro is a rotary position sensing transformer. The different speeds are usually obtained by use of a gear train.
SEE OR SEARCH THIS CLASS, SUBCLASS:
654+, for synchro systems, per se.
660, for systems in which one of the synchros may be an "Inductosyn". An "Inductosyn" is a planar two phase synchro.
661, for resolver systems, per se. A resolver is merely a two phase synchro.
692, for "self-synchronous" motor controls in which the receivers are selsyn motors. A selsyn motor is a device similar to a synchro but which produces torque.
