(under subclass 72) Subject matter wherein the space discharge device or devices are electric arcs.
(1) Note. The systems in this subclass are limited to those in which the discharge is between electrodes exposed to the atmosphere. Other systems under subclass 72 where the discharge has negative resistance characteristics (arc) are in subclass 72 or indented subclass 73 where the discharge device has a control device.
SEE OR SEARCH THIS CLASS, SUBCLASS:
72, see note 1 above.
73, see note 1 above.
SEE OR SEARCH CLASS
314, Electric Lamp and Discharge Devices: Consumable Electrodes, appropriate subclasses for systems, including arc discharge devices of the consumable electrode type which are provided with means for controlling current flowing in the arc. 315, Electric Lamp and Discharge Devices: Systems,
326+, and the subclasses specified in the notes to these subclasses, for miscellaneous systems for controlling the operation of electric arcs.
323, Electricity: Power Supply or Regulation Systems,
227, and 291, for space discharge device regulating systems of the electric arc type.
