(under subclass 76) Subject matter having a rotor upon which torque is exerted by means of an electo-magnetic field which produces eddy current in the rotor.
(1) Note. This subclass includes, for example, the familiar AC integrating watt hour meter. The rotor is often known as a Ferraris disk.
(2) Note. The rotor in this subclass may rotate continuously or may rotate through only a certain angle as determined by the stiffness of a spring which restrains further rotation.
SEE OR SEARCH THIS CLASS, SUBCLASS:
152, for this subject matter where the eddy current rotor is merely a drag disk.
SEE OR SEARCH CLASS
310, Electrical Generator or Motor Structure, 166+, for eddy current motors of general application.
318, Electricity: Motive Power Systems,
727+, for eddy current motor systems of general application. Note particularly indented subclasses 781+, for eddy current motors which operate from a single phase source.
