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Application filedfiledCritical
Priority to JP1972033118UpriorityCriticalpatent/JPS5353409Y2/ja
Priority to US00338366Aprioritypatent/US3814976A/en
Publication of JPS48109852UpublicationCriticalpatent/JPS48109852U/ja
Application grantedgrantedCritical
Publication of JPS5353409Y2publicationCriticalpatent/JPS5353409Y2/ja
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
H01J1/16—Cathodes heated directly by an electric current characterised by the shape