US PATENT SUBCLASS 318 / 622
.~.~.~ A.C. networks

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

560  DF  POSITIONAL SERVO SYSTEMS (E.G., SERVOMECHANISMS) {23}
611  DF  .~ With stabilizing features (e.g., anti-hunting, damping) {8}
621  DF  .~.~ Lead or lag networks {1}
622.~.~.~ A.C. networks

DEFINITION

Classification: 318/622

(under subclass 621) Subject matter in which the lead and lag circuit is adapted for use in an AC servo loop.

(1) Note. Since many lead and lag circuits will only operate on DC Voltages, the systems classified herein may include: Means to demodulate the AC signals in an AC servo loop, passing the demodulated signal through the lead or lag circuit, and then remodulating the resultant signal.