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Filing date
Publication date
Application filedfiledCritical
Priority to NL6516879ApriorityCriticalpatent/NL6516879A/xx
Priority to BE691653Dprioritypatent/BE691653A/fr
Priority to ES0334795Aprioritypatent/ES334795A1/es
Publication of NL6516879ApublicationCriticalpatent/NL6516879A/xx
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
H01J1/14—Solid thermionic cathodes characterised by the material