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Publication of FR33704EpublicationCriticalpatent/FR33704E/fr
H01J1/00—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
H01J1/02—Main electrodes
H01J1/13—Solid thermionic cathodes
H01J1/15—Cathodes heated directly by an electric current
H01J1/18—Supports; Vibration-damping arrangements
FR33704D1927-03-071927-03-07Perfectionnements aux appareils thermoioniques
ExpiredFR33704E
(fr)