US PATENT SUBCLASS 318 / 66
.~ Running-speed control

Current as of: June, 1999
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318 /   HD   ELECTRICITY: MOTIVE POWER SYSTEMS

34  DF  PLURAL, DIVERSE OR DIVERSELY CONTROLLED ELECTRIC MOTORS {22}
66.~ Running-speed control {4}
67  DF  .~.~> Diverse speeds for different motors
68  DF  .~.~> Relative motor speed control {5}
82  DF  .~.~> Armature or primary circuit control {1}
84  DF  .~.~> Field or secondary circuit control

DEFINITION

Classification: 318/66

(under subclass 34) Subject matter in which means are provided for controlling the running speed of two or more electric motors.

(1) Note. Where the same means which is used to control the acceleration and/or deceleration of the motor is also used to control the running speed of the motors, no other running control means being claimed, classification will not be herein but in the more appropriate acceleration subclass.

SEE OR SEARCH THIS CLASS, SUBCLASS:

59+, and the subclasses specified in the Notes to the definition of those subclasses for this subject matter where the system includes means for running speed control and another different type of motor control.

SEE OR SEARCH CLASS

307, Electrical Transmission or Interconnection Systems,

53+, for load current division among a plurality of generators, frequently by control of their running speed. 388, Electricity: Motor Control Systems,

800+, and 825+ for single motor running-speed control systems with, and without, feedback, respectively.