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Publication of FR647237ApublicationCriticalpatent/FR647237A/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
FR647237D1927-06-081927-06-08Dispositif de fixation du filament d'une lampe
ExpiredFR647237A
(fr)