(under the class definition) Subject matter in which means are provided for energizing an electric motor to produce a substantial output force or torque which is insufficient under prevailing conditions to cause the motor to start.
(1) Note. This subclass is designed to include mere torque or force producing motors which, under the conditions of loading, cannot cause the useful load device to move appreciably, other than to effect a mere slack, play or back-lash take-up movement, but which motor nevertheless exerts a sustained torque or force on the load device.
SEE OR SEARCH THIS CLASS, SUBCLASS:
6, for motor systems specifically limited to maintain a tension in a cable, belt, strand or strip material under running or stationary conditions.
40, for plural motors systems having at least one motor biased against rotation.
159, for motor systems having means (other than a useful load device) for biassing the motor against rotation. 430, for motor systems having means for controlling the motor torque at the starting period to insure that the motor will start, and for motor systems having means for stalling or overloading the motor while the motor is energized.
SEE OR SEARCH CLASS
324, Electricity: Measuring and Testing,
98, for electric meters wherein the motive-power element of the meter is energized to exert torque on a non-moving pointer to hold it in an indicating position.
388, Electricity: Motor Control Systems,
848+, for single motor acceleration control systems wherein a motor is energized while stationary, but which motor immediately starts and controllably accelerates to a running condition.
