(under subclass 521) Subject matter in which means are provided for physically making and/or breaking the field circuit of the motor.
(1) Note. See Circuit Making and/or Breaking Device, of the class definition for a definition of "Circuit making and breaking".
SEE OR SEARCH THIS CLASS, SUBCLASS:
519, and the subclasses specified in the Notes thereto, for motor systems having means for making and/or breaking the armature or primary circuit of the electric motor.
529, for motor systems where the motor has a plurality of field windings and means are provided for selectively energizing the field windings thereby generally necessitating the making and/or breaking of the circuit to one or more of the windings.
705, for synchronous motors starting as repulsion or induction motors wherein means are provided for connecting or disconnecting the field exciting means.
716, for this subject matter in synchronous motors systems. SEE OR SEARCH CLASS
322, Electricity: Single Generator Systems,
69, for generator systems having means for making and/or breaking the field circuit of an electric generator.
