(under the class definition) Subject matter in which a rotary electric motor, of the type in which the rotary element tends to assume a predetermined angular position when the motor is continuously energized, is provided with a commutator or
circuit making and breaking means which is actuated by the motor to determine the instants of time at which the field producing winding or windings thereof are energized and de-energized relative to the angular position of the rotary element of the motor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
138, for motors systems having space-discharge devices for commutating the current to the motor.
244, for alternating current commutating motor systems.
246, for series motor systems where the motor has commutators.
519+, and the subclasses specified in the Notes thereto, for miscellaneous motor systems having circuit making and breaking means in the armature or primary circuit of the motor. 700+, for synchronous motor systems where the motor has commutators.
737, and 738, for induction motor systems where the motor has commutators.
