GB255983A - Improvements in thermionic valves - Google Patents

Improvements in thermionic valves

Info

Publication number
GB255983A
GB255983A GB1278325A GB1278325A GB255983A GB 255983 A GB255983 A GB 255983A GB 1278325 A GB1278325 A GB 1278325A GB 1278325 A GB1278325 A GB 1278325A GB 255983 A GB255983 A GB 255983A
Authority
GB
United Kingdom
Prior art keywords
mercury
tungsten
anode
magnesium
pressure
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
GB1278325A
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB1278325A priority Critical patent/GB255983A/en
Publication of GB255983A publication Critical patent/GB255983A/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
    • H01J7/02—Selection of substances for gas fillings; Specified operating pressure or temperature

Landscapes

  • Discharge Lamp (AREA)

Abstract

255,983. General Electric Co., Ltd., and Thompson, M. May 15, 1925. Vacuum tubes.-A valve has an uncarbonized cathode of tungsten or tungsten-molybdenum alloy containing thorium and giving the electron emission characteristic of a surface film of therium, a filling of helium at a pressure not greater than a few mm. of mercury, for instance, 3 mm., and not less than 0.1 mm. of mercury. and magnesium or similar reducing metal, having at room pressure a vapour pressure much less than that of potassium, deposited on the inner wall of the bulb. The deposit of magnesium is obtained by attaching a piece of the metal to the anode and heating the anode bv electron bombardment. Specifications 148,132, 184,446, and 248,956 are referred to.
GB1278325A 1925-05-15 1925-05-15 Improvements in thermionic valves Expired GB255983A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1278325A GB255983A (en) 1925-05-15 1925-05-15 Improvements in thermionic valves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1278325A GB255983A (en) 1925-05-15 1925-05-15 Improvements in thermionic valves

Publications (1)

Publication Number Publication Date
GB255983A true GB255983A (en) 1926-08-05

Family

ID=10011035

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1278325A Expired GB255983A (en) 1925-05-15 1925-05-15 Improvements in thermionic valves

Country Status (1)

Country Link
GB (1) GB255983A (en)

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