(under the class definition) Subject matter wherein the tuner is combined with some form of electrical indicator which operates in such a manner as to give an indication of whether or not the tuned circuit is tuned for maximum output signal strength or peak resonance.
(1) Note. Subject matter found in this and the indented subclasses properly includes a frequency or phase demodulator with or without some detail tuning structure together with detailed tuning indicating structure provided the output from the frequency or phase demodulator is applied only to the indicating means. Details of a frequency or phase demodulator which have an output applied to other circuitry than the indicating means or where the indicating means is only claimed broadly in combination with a demodulator, classification is in Class 329, Demodulators and Detectors, subclass 111. See also (2) Note under Class 329, subclass 111.
SEE OR SEARCH THIS CLASS, SUBCLASS:
86+, for tuners including a device for conveying information as to the particular band or position within a band of frequencies to which the tuner circuit is adjusted.
SEE OR SEARCH CLASS
250, Radiant Energy,
39, for wave meters. 324, Electricity: Measuring and Testing,
76.39+, for measurement of the frequency of electrical energy.
329, Demodulators, appropriate subclasses for demodulators which may include some form of electrical indicator.
2, for amplifiers with condition indicating or testing means.
331, Oscillators, for oscillators with indicator, signal or alarm.
118, for indicating or measuring in a frequency modulator and subclass 150 for indicating or measuring in an amplitude modulator
340, Communications: Electrical, for electrical signaling generally, especially
870.08, for radio dial indicators in telemetering systems and subclasses 657+ for current characteristic controlled electric signals or alarms.
348, Television, 569+, for television receiver tuners having a tuning indicator associated therewith.
154.1+, for receivers with tuning or resonance indicators.