(under the class definition) Subject matter in which means are provided for positioning or phasing the movable (working) element on an electric motor with reference to some object, fixed or in motion, or with reference to cyclic conditions or time.
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18, for follow-up systems of electric motor control wherein a motor is positioned relatively to a transmitting or controlling member or with reference to a predetermined condition.
41, for this subject matter where one motor is in predetermined relative position with respect to another motor by means of electrical synchronizing interconnections between the motors.
45, for this subject matter where two or more motors are mechanically coupled together so that their movable elements are constrained to maintain a predetermined relative phase or angular position with respect to each other.
68, for this subject matter where one motor has its speed and/or phase relationship controlled with respect to another
motor under running speed conditions. 85, for miscellaneous motor systems having means for synchronizing, resynchronizing or phasing control of two or more electric motors.
136, for motor systems having means for starting or accelerating motors other than by electrical energization of the motor, including means for synchronizing or phasing the motors relative to an AC source of supply to which the motors are to be connected.
466, for motor systems having means for automatically stopping a motor when it reaches a predetermined position.