(under the class definition) Subject matter in which the motor comprises a rotatable power output element (rotor) combined with means for exerting a torque in opposition to and simultaneously with the motor torque.
(1) Note. Examples of means for producing the opposing torque which are included in this subclass: elastic or spring devices interconnecting the rotor and stationary part of the motor; a pulley or drum mounted on the rotor with a weighted flexible member attached thereto and adapted to rotate the rotor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
1+, for motor systems having nonelectric means for actuating a load device in addition to an electric motor as an actuator.
45+, see Note 2 above.
119+, for reciprocating motor systems in which the reciprocating element may be biassed by gravity or by force-producing means in one direction of actuating and electrically in the other direction of actuation. SEE OR SEARCH CLASS
251, Valves and Valve Actuation,
129.01, for valves with electrical actuators.
310, Electrical Generator or Motor Structure,
15+, for reciprocating electrical motors having a biassing means present.
324, Electricity: Measuring and Testing,
131, for electrically driven or actuated meter movements having biassed indicating means.
