(under subclass 727) Subject matter wherein the induction motor includes two rotors rotatable with respect to each other.
(1) Note. One rotor may support the primary member and the other rotor may support the secondary member, or one primary member may be on a stator and the secondary may be supported on one rotor with a second primary member on the other rotor, and the system to supply or control may be connected to the primary members, the secondary members, or to both.
(2) Note. The rotation of the motor may be reversed in this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
731+, for induction motors of the double fed type.
737, for self-cascaded, double fed induction motors.
