(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; indexes in discrete angular increments of essentially uniform magnitude as a function of pulse inputs derived from outside the motor.
(1) Note. The pulses supplied to the motors used in these systems are not responsive to rotor movement or position.
(2) Note. Nonstepping space discharge commutated motors are classified elsewhere.
SEE OR SEARCH THIS CLASS, SUBCLASS:
138, for nonstepping space discharge commutated motors
685, for closed-loop servomechanisms which employ stepping motors. SEE OR SEARCH CLASS