(under subclass 86) Subject matter wherein the oscillator includes means to vary or change the frequency of the oscillations generated by the oscillator.
(1) Note. The frequency adjustment of the oscillator may be effected in many ways, (1) by moving a tuning element such as a variable capacitor or variable inductor of a resonant circuit or the short-circuiting element of a resonant line, (2) by electronic control such as an auxiliary cathode in a resonator cavity of a multicavity magnetron, (3) by adjusting the strength of the magnetic field in the electron
interaction space of a magnetron.
SEE OR SEARCH THIS CLASS, SUBCLASS:
1+, for oscillators having means for automatically stabilizing the oscillator frequency, especially indented subclass 5 wherein the oscillator is of the magnetron type.
40, for beat frequency adjustment or control.
47, for plural oscillators where one oscillator sweeps the frequency of another. 48, for plural oscillators having means to adjust the frequency of one or more oscillators.
177+, for oscillators in general having frequency adjusting means.
SEE OR SEARCH CLASS
315, Electric Lamp and Discharge Devices: Systems,
39.55+, for distributed parameter resonator magnetron type space discharge device having variable tuning means.
332, Modulators,
5, for modulator systems of magnetic field electronic tube type (e.g., magnetic) wherein the modulating signal may vary the tuning of the system.
