Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Metropolitan Vickers Electrical Co Ltd
Original Assignee
Metropolitan Vickers Electrical Co Ltd
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Application filed by Metropolitan Vickers Electrical Co LtdfiledCriticalMetropolitan Vickers Electrical Co Ltd
Application grantedgrantedCritical
Publication of FR587942ApublicationCriticalpatent/FR587942A/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
H01J1/135—Circuit arrangements therefor, e.g. for temperature control
FR587942D1923-07-241924-07-21
Improvements to electric vacuum tubes
ExpiredFR587942A
(en)