GB350938A - Improvements in vacuum electric tube devices - Google Patents

Improvements in vacuum electric tube devices

Info

Publication number
GB350938A
GB350938A GB839830A GB839830A GB350938A GB 350938 A GB350938 A GB 350938A GB 839830 A GB839830 A GB 839830A GB 839830 A GB839830 A GB 839830A GB 350938 A GB350938 A GB 350938A
Authority
GB
United Kingdom
Prior art keywords
grid
class
silver
vacuum electric
potassium
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
GB839830A
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.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical Industries Ltd
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 Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB839830A priority Critical patent/GB350938A/en
Publication of GB350938A publication Critical patent/GB350938A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
    • H01J19/28—Non-electron-emitting electrodes; Screens
    • H01J19/30—Non-electron-emitting electrodes; Screens characterised by the material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
    • H01J2893/0012—Constructional arrangements
    • H01J2893/0019—Chemical composition and manufacture
    • H01J2893/002—Chemical composition and manufacture chemical

Landscapes

  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

350,938. Thermionic valves. BARTON, F., 41, Glebe Avenue, Enfield, Middlesex, and ASSOCIATED ELECTRICAL INDUSTRIES, Ltd., Bush House, Aldwych, London. March 15, 1930, No. 8398. [Class 39 (i).] The grids of vacuum electric tubes with oxidecoated cathodes are provided with a coating layer of a metal which inherently prevents or reduces grid emission and does not inhibit cathode emission, silver, gold, copper, and lead being examples of such metals. In an example, a molybdenum grid provided with a nickel supporting wire is silverplated in a bath containing a mixed solution of potassium cyanide and potassium silver cyanide. After washing and drying the grid is placed in a vacuum oven at 700‹ C. for thirty minutes. Specification 250,485, [Class 39 (i), Electric lamps, Arcs &c.], is referred to.
GB839830A 1930-03-15 1930-03-15 Improvements in vacuum electric tube devices Expired GB350938A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB839830A GB350938A (en) 1930-03-15 1930-03-15 Improvements in vacuum electric tube devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB839830A GB350938A (en) 1930-03-15 1930-03-15 Improvements in vacuum electric tube devices

Publications (1)

Publication Number Publication Date
GB350938A true GB350938A (en) 1931-06-15

Family

ID=9851765

Family Applications (1)

Application Number Title Priority Date Filing Date
GB839830A Expired GB350938A (en) 1930-03-15 1930-03-15 Improvements in vacuum electric tube devices

Country Status (1)

Country Link
GB (1) GB350938A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2470248A (en) * 1945-05-01 1949-05-17 Hartford Nat Bank & Trust Co Electron discharge tube with metal foil electrode
US2858466A (en) * 1955-11-25 1958-10-28 Westinghouse Electric Corp Method of reducing secondary emission from bombarded surfaces
US3328625A (en) * 1964-12-10 1967-06-27 Rca Corp Small electrode spacing electron tube

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2470248A (en) * 1945-05-01 1949-05-17 Hartford Nat Bank & Trust Co Electron discharge tube with metal foil electrode
US2858466A (en) * 1955-11-25 1958-10-28 Westinghouse Electric Corp Method of reducing secondary emission from bombarded surfaces
US3328625A (en) * 1964-12-10 1967-06-27 Rca Corp Small electrode spacing electron tube

Similar Documents

Publication Publication Date Title
US2282098A (en) Carbon electrode
GB350938A (en) Improvements in vacuum electric tube devices
US1831314A (en) Photoelectric tube
US1934477A (en) Electrostatically controlled electric discharge device
GB364006A (en) Improvements in and relating to photo-electric apparatus
GB365303A (en) Electron tube with incandescent cathode
GB833432A (en) Improvements in or relating to indirectly heated cathodes for electron discharge devices and to heater elements therefor
US1601066A (en) Electron-discharge device
US2279821A (en) Secondary electron emissive electrode
GB434643A (en) Improvements in or relating to electron discharge devices
US2040530A (en) Electron discharge device
US1477869A (en) Electronic emission
GB300613A (en) Improvements in vacuum electric tube devices
GB519854A (en) Improvements in and relating to vacuum electric discharge devices
GB304580A (en) Improved process for coating metallic or non-metallic bodies with osmium
GB384857A (en) Improvements in luminous electric discharge tubes
GB271885A (en) Improvements in or relating to vacuum electric tube devices
GB250485A (en) Improvements in electron discharge devices
GB219396A (en) Improvements in thermionic devices
GB317504A (en) Improvements in and relating to the manufacture of electric discharge devices
GB310903A (en) Improvements in thermionic valves
GB698853A (en) Improvements in electric discharge tubes
GB319686A (en) Improvements relating to electrical discharge devices
GB421795A (en) Improvements in metal vapour arc devices
GB728067A (en) Improvements relating to thermionic cathode discharge tubes