(under the class definition) Adjustable inductor devices where the change in inductance is effected by adjusting or varying the inductance changing elements of the device in response to a condition by condition sensing means external to the device.
(1) Note. The inductance varying element may be a thermally responsive element (including those for temperature compensations; however, where compensation is effected by the internal structure of the device, classification is not herein but in subclass 179), a fluid pressure diaphragm (e.g., a barometer), a centrifugal device, or any other device or means responsive to a condition.
(2) Note. The following are illustrative examples: [figure] [figure]
(3) Note. See section VI of the class definition for a listing of other classes which have condition response variable inductor devices.
SEE OR SEARCH THIS CLASS, SUBCLASS:
179, and see (1) Note, above. SEE OR SEARCH CLASS
307, Electrical Transmission or Interconnection Systems, appropriate subclasses, for automatically controlled systems of general application involving two or more sources or input circuits and/or two or more output or load circuits.
323, Electricity: Power Supply or Regulation Systems, for single load regulation systems in which the regulation is controlled by a condition.
331, Oscillators,
65+, for oscillator systems combined with a device responsive to an external physical condition and wherein a frequency determining element (inductor or capacitor) of the oscillator is varied by the condition sensing device.
333, Wave Transmission Lines and Networks,
2+, and 17.1+ for wave transmission lines and networks including an adjustable inductor with automatic control, and subclasses 15 and 16 for pilot line and pilot current control systems respectively which may include an adjustable inductor with automatic control.
334, Tuners,
4, for magnetic responsive tuners; subclasses 5+ for tuners responsive to an external condition; subclass 13 for tuners having a saturable core type element and means to
automatically center the frequency of the circuit; subclass 16 for a tuner utilizing a reactance tube tuner combined with automatic frequency centering circuit means, and subclasses 26+ for a tuner having an electromagnetic operator with automatic frequency centering means.
455, Telecommunications,
257, for receivers with automatic frequency control and subclasses 150.1+ for particular frequency selection means in radio receivers.
