US PATENT SUBCLASS 318 / 69
.~.~.~ With speed-difference detector

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


318 /   HD   ELECTRICITY: MOTIVE POWER SYSTEMS

34  DF  PLURAL, DIVERSE OR DIVERSELY CONTROLLED ELECTRIC MOTORS {22}
66  DF  .~ Running-speed control {4}
68  DF  .~.~ Relative motor speed control {5}
69.~.~.~ With speed-difference detector {2}
70  DF  .~.~.~.~> Electrical-type detectors {4}
76  DF  .~.~.~.~> Differential-gearing detector

DEFINITION

Classification: 318/69

(under subclass 68) Subject matter in which means are provided for detecting or sensing a difference in speed between two or more of the motors and for initiating the operation of the means for controlling the relative speeds of the motors.

SEE OR SEARCH CLASS

73, Measuring and Testing,

507, for a device responsive to the difference in speed between two bodies.

322, Electricity: Single Generator Systems,

36, for systems wherein the speed of a generator is compared with the speed of a reference device (which might be an electric motor) and means are provided for regulating the speed of the generator relative to the reference device.

388, Electricity: Motor Control Systems, 800+, for single motor running-speed control systems with feedback.