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Application filed by Lorenz C AgfiledCriticalLorenz C Ag
Publication of CH213668ApublicationCriticalpatent/CH213668A/de
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
H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
CH213668D1938-08-111939-08-08Entladungsröhre mit nur teilweise von einer Emissionsschicht bedeckter Kathode.
CH213668A
(de)