US PATENT SUBCLASS 331 / 34
.~ Particular frequency control means

Current as of: June, 1999
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331 /   HD   OSCILLATORS

1 R  DF  AUTOMATIC FREQUENCY STABILIZATION USING A PHASE OR FREQUENCY SENSING MEANS {16}
34.~ Particular frequency control means {2}
35  DF  .~.~> Electromechanical (e.g., motor)
36 R  DF  .~.~> Reactance device (e.g., variable capacitors, saturable inductors, reactance tubes, etc.) {2}

DEFINITION

Classification: 331/34

(under subclass 1) Subject matter wherein the controlled oscillator includes a significant or particular means for controlling, adjusting or varying its generated frequency as a function of the error signal from the discriminator in the A.F.S. loop of the controlled oscillator. The particular means may be (1) the adjustable tuning element of the controlled oscillator (e.g., a passive reactance or a reactance tube comprising an element of the oscillator tank circuit), or (2) the means for adjusting the tuning element of (1), (such as an electric motor drive therefor), or (3) the combination of (1) and (2).

SEE OR SEARCH THIS CLASS, SUBCLASS:

177+, for oscillators in general with particular frequency adjustment means.

SEE OR SEARCH CLASS

333, Wave Transmission Lines and Networks,

219+, for resonators of the distributed parameter type which may be provided with frequency adjusting means.

334, Tuners, appropriate subclasses for tuners, per se. See the reference to Class 334 under 1, above.