Description
Class H01J : ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
Subclass 1/08: Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps (details of electron-optical arrangements or of ion traps H01J 3/00) Main electrodes Liquid electrodes, e.g. liquid cathode Positioning or moving the cathode spot on the surface of a liquid-pool cathode