US PATENT SUBCLASS 318 / 684
.~.~ With particular modulator or detector (e.g., choppers)

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}
684.~.~ With particular modulator or detector (e.g., choppers)

DEFINITION

Classification: 318/684

(under subclass 671) Subject matter in which the particular motor control includes a particular modulator or detector. Included herein are "chopper" systems.

SEE OR SEARCH CLASS

330, Amplifiers,

9, and 10 for chopper or modulated amplifying systems.

335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,

87+, for magnetically operated periodic switches (e.g., vibrators).