US PATENT SUBCLASS 318 / 674
.~.~.~ Wheatstone bridge type

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}
672  DF  .~.~ Discontinuous or "on-off" control {2}
674.~.~.~ Wheatstone bridge type

DEFINITION

Classification: 318/674

(under subclass 672) Subject matter in which the

discontinuous or "on-off" motor control is controlled by a Wheatstone bridge circuit.

SEE OR SEARCH THIS CLASS, SUBCLASS:

663, for potentiometer systems which may be of the Wheatstone type.