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
GB358448A
Inventor
Gilbert Harold Metson
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.)
HIS MAJESTY S POSTMASTER GENER
Original Assignee
HIS MAJESTY S POSTMASTER GENER
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 HIS MAJESTY S POSTMASTER GENERfiledCriticalHIS MAJESTY S POSTMASTER GENER
Priority to GB358448ApriorityCriticalpatent/GB657027A/en
Publication of GB657027ApublicationCriticalpatent/GB657027A/en
H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
H01J9/38—Exhausting, degassing, filling, or cleaning vessels
Landscapes
Engineering & Computer Science
(AREA)
Manufacturing & Machinery
(AREA)
Solid Thermionic Cathode
(AREA)
Abstract
657,027. Electron discharge apparatus. POSTMASTER GENERAL. Feb. 6, 1948, No. 3584. [Class 39 (i)] The argon content of the residual gas remaining after evacuation in an electron discharge device having an oxide-coated cathode is further reduced by flushing the envelope with a gas having no deleterious effects on the electrodes, e.g. carbon dioxide, and evacuating again. The process may be repeated, and the remaining traces of flushing gas are finally cleaned up by gettering.
GB358448A1948-02-061948-02-06Improvements in or relating to the manufacture of electron discharge devices
ExpiredGB657027A
(en)