GB881797A - Improvements in grids for electron tubes - Google Patents

Improvements in grids for electron tubes

Info

Publication number
GB881797A
GB881797A GB36012/59A GB3601259A GB881797A GB 881797 A GB881797 A GB 881797A GB 36012/59 A GB36012/59 A GB 36012/59A GB 3601259 A GB3601259 A GB 3601259A GB 881797 A GB881797 A GB 881797A
Authority
GB
United Kingdom
Prior art keywords
wire
magnesium
grid
coating
electron tube
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
GB36012/59A
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.)
Egyesuelt Izzolampa es Villamossagi Rt
Original Assignee
Egyesuelt Izzolampa es Villamossagi Rt
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 Egyesuelt Izzolampa es Villamossagi Rt filed Critical Egyesuelt Izzolampa es Villamossagi Rt
Publication of GB881797A publication Critical patent/GB881797A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
    • 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

Landscapes

  • Solid Thermionic Cathode (AREA)

Abstract

In the production of a grid electrode for an electron tube, a metal wire is pulled through a melt consisting wholly or partly of aluminium in a protective gas atmosphere and is afterwards heated to produce a dark-grey coating thereon. The grid may be formed either before or after the heat treatment of the wire which may consist of heating to between 600 DEG and 800 DEG C. for 5 to 10 minutes (preferably in vacuo) and may be effected after the grid is mounted in the electron tube. Preferably the melt contains 5 to 60%, e.g. 20%, by weight of magnesium which ensures that the coating adheres strongly to the wire. Alternatively the magnesium may be replaced with a small amount of silicon or titanium. The coating is found to contain aluminium, and magnesium if it is used, in the form of alloys and/or compounds with the material of the wire, e.g. molybdenum or possibly tungsten or nickel.
GB36012/59A 1958-10-24 1959-10-23 Improvements in grids for electron tubes Expired GB881797A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HU881797X 1958-10-24

Publications (1)

Publication Number Publication Date
GB881797A true GB881797A (en) 1961-11-08

Family

ID=10980807

Family Applications (1)

Application Number Title Priority Date Filing Date
GB36012/59A Expired GB881797A (en) 1958-10-24 1959-10-23 Improvements in grids for electron tubes

Country Status (1)

Country Link
GB (1) GB881797A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4469984A (en) * 1981-02-13 1984-09-04 Sergeev Jury S Grid-like electrode for electronic components and process for making same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4469984A (en) * 1981-02-13 1984-09-04 Sergeev Jury S Grid-like electrode for electronic components and process for making same

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