(under subclass 66.1) Subject matter wherein a transmitter employs the negative-resistance characteristics of an arc or the oscillatory discharge of a capacitor through an inductor and a spark gap as a source of radio frequency oscillations.
SEE OR SEARCH CLASS
307, Electrical Transmission or Interconnection Systems,
106+, for pulse producing systems which may employ a spark
gap for discharging a condenser.
313, Electric Lamp and Discharge Devices, appropriate subclasses for spark gap or arc devices, per se.
314, Electric Lamp and Discharge Devices: Consumable Electrodes, appropriate subclasses for spark gap devices with consumable electrodes.
331, Oscillators, 127, for oscillators of the spark or open arc type.
332, Modulators, appropiate subclasses for modulators of the spark or open arc type.
