GB231194A - An improved process for the manufacture of thermionic valves - Google Patents

An improved process for the manufacture of thermionic valves

Info

Publication number
GB231194A
GB231194A GB7678/25A GB767825A GB231194A GB 231194 A GB231194 A GB 231194A GB 7678/25 A GB7678/25 A GB 7678/25A GB 767825 A GB767825 A GB 767825A GB 231194 A GB231194 A GB 231194A
Authority
GB
United Kingdom
Prior art keywords
manufacture
improved process
thermionic valves
valve
thermionic
Prior art date
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
GB7678/25A
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.)
Thales SA
Original Assignee
CSF Compagnie Generale de Telegraphie sans Fil SA
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 CSF Compagnie Generale de Telegraphie sans Fil SA filed Critical CSF Compagnie Generale de Telegraphie sans Fil SA
Publication of GB231194A publication Critical patent/GB231194A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J7/00—Details not provided for in the preceding groups and common to two or more basic types of discharge tubes or lamps
    • H01J7/14—Means for obtaining or maintaining the desired pressure within the vessel
    • H01J7/18—Means for absorbing or adsorbing gas, e.g. by gettering
    • H01J7/183—Composition or manufacture of getters

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Solid Thermionic Cathode (AREA)

Abstract

231,194. Compagnie GÚnÚrale de TÚlÚ- graphie sans Fil. March 22, 1924, [Convention date]. Vacuum tubes.-Exhaustion of a thermionic valve is completed by means of a piece of a metal such as magnesium, placed on or near the plate electrode, which is heated by radiation from the grid, through which current is passed for this purpose. The valve is first preliminarily exhausted and sealed. No bombardment is necessary. The filament may be thoriated. Specification 130,039 is referred to.
GB7678/25A 1924-03-22 1925-03-21 An improved process for the manufacture of thermionic valves Expired GB231194A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR231194X 1924-03-22

Publications (1)

Publication Number Publication Date
GB231194A true GB231194A (en) 1925-07-16

Family

ID=8882391

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7678/25A Expired GB231194A (en) 1924-03-22 1925-03-21 An improved process for the manufacture of thermionic valves

Country Status (1)

Country Link
GB (1) GB231194A (en)

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