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Compteurs Schlumberger SA
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Compteurs Schlumberger SA
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Application filed by Compteurs Schlumberger SAfiledCriticalCompteurs Schlumberger SA
Application grantedgrantedCritical
Publication of FR804706ApublicationCriticalpatent/FR804706A/en
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
H01J1/22—Heaters
FR804706D1935-07-251935-07-25
Method of isolating the heating filament from incandescent cathodes
ExpiredFR804706A
(en)