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.)
Expired
Application number
GB19344/20A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefunken AG
Original Assignee
Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Telefunken Gesellschaft fuer Drahtlose Telegraphie mbHfiledCriticalTelefunken Gesellschaft fuer Drahtlose Telegraphie mbH
Publication of GB147441ApublicationCriticalpatent/GB147441A/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
H01J1/14—Solid thermionic cathodes characterised by the material
Landscapes
Electron Sources, Ion Sources
(AREA)
Abstract
147,441. Ges. f³r Drahtlose Telegraphie. Jan. 23, 1918, [Convention date]. Vacuum tubes.-A cathode for a three-electrode valve is formed of a metal of the alkaline-earth group such as calcium or magnesium. The tube may contain hydrogen or one of the rare gases.
GB19344/20A1918-01-231920-07-07Improvements in electronic tubes
ExpiredGB147441A
(en)
Improved methods of cleaning up residual gases in evacuated containers and/or activating electron-emitting electrodes therein also applicable for the purification of rare gases