US PATENT SUBCLASS 318 / 682
.~.~.~ Rotating amplifier (e.g., "Ward Leonard" control)

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

560  DF  POSITIONAL SERVO SYSTEMS (E.G., SERVOMECHANISMS) {23}
671  DF  .~ With particular motor control system responsive to the "actuating signal" {10}
677  DF  .~.~ With particular servoamplifier {5}
682.~.~.~ Rotating amplifier (e.g., "Ward Leonard" control)

DEFINITION

Classification: 318/682

(under subclass 677) Subject matter in which the particular servoamplifier is a rotating amplifier. For example, a generator with plural field winding which control current, voltage or power output. Included herein are "Ward-Leonard" control systems.

SEE OR SEARCH THIS CLASS, SUBCLASS:

140+, for generator-fed motor speed control systems.

SEE OR SEARCH CLASS

322, Electricity: Single Generator Systems, for single generator systems in which the generator is connected as an amplifier.

330, Amplifiers,

58, for rotating amplifiers, per se.