(under the class definition) Subject matter wherein the oscillator is provided with an indicator, signal or alarm means to indicate or signal some state or condition of the oscillator.
(1) Note. Examples of indicating, signaling or alarm means included herein are (1) calibrated scales and cooperating indicators or pointers to indicate the frequency setting of a tunable tank circuit of the oscillator or to indicate the amplitude setting of an output attenuator of the oscillator, (2) electric meters, signals or alarms to indicate or respond to any current or potential of the oscillator, such as output load current or power, overload current, bias potential level, frequency of the generated oscillations, standing wave ratio of oscillator resonator, etc., (3) indicating or signaling means responsive to any other condition of the oscillator such as temperature or humidity, by way of example.
(2) Note. Systems wherein the oscillator is an element of a more comprehensive indicating or signaling system, for example, a system for performing an external (to the oscillator) chemical, physical or electrical measurement or test are not classified herein but in the class providing for such systems.
SEE OR SEARCH THIS CLASS, SUBCLASS:
44, for methods of or systems for calibrating the oscillation frequency setting means or tuning scale of an oscillator or for testing the oscillation frequency characteristics of the oscillator.
SEE OR SEARCH CLASS
73, Measuring and Testing, appropriate subclasses for physical measuring and testing systems or devices in general not elsewhere provided for. 116, Signals and Indicators, appropriate subclasses for indicators, signals and alarms of the mechanical type and not elsewhere classifiable.
250, Radiant Energy,
250, for radio and microwave absorption meters for determining the wavelength or frequency of a radio or microwave.
324, Electricity: Measuring and Testing, appropriate subclasses for electrical measuring and testing systems in
general, particularly
76.39+, for cyclic current or voltage frequency measuring or testing devices.
332, Modulators,
118, for frequency modulators and subclass 150 for amplitude modulators with indicating means, observing means and/or signal, respectively.
340, Communications: Electrical, appropriate subclasses for electrical signals and alarms, especially
870.01+, for continuous variable indication devices and systems (e.g., telemetry) and subclass 653 for oscillator condition responsive signals and alarms.
