(under subclass 560) Subject matter in which the servo system is a "Feelback" system. "Feelback" is that characteristic of a servo system in which the servo system does not apply all the force required in positioning the member, but is a manual assist device.
SEE OR SEARCH THIS CLASS, SUBCLASS:
2, for motor controls including manual driving means.
SEE OR SEARCH CLASS
91, Motors: Expansible Chamber Type,
434, for fluid servomechanisms including "Feelback" is included.
