GB370297A - Improvements relating to electron discharge tubes or thermionic valves - Google Patents

Improvements relating to electron discharge tubes or thermionic valves

Info

Publication number
GB370297A
GB370297A GB21788/31A GB2178831A GB370297A GB 370297 A GB370297 A GB 370297A GB 21788/31 A GB21788/31 A GB 21788/31A GB 2178831 A GB2178831 A GB 2178831A GB 370297 A GB370297 A GB 370297A
Authority
GB
United Kingdom
Prior art keywords
class
zirconium
core
arc
improvements relating
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
GB21788/31A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB370297A publication Critical patent/GB370297A/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

  • Discharge Lamp (AREA)

Abstract

370,297. Discharge apparatus. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, 13D, Emmasingel, Eindhoven, Holland. July 30, 1931, No. 21788. Convention date, Nov. 22, 1930. Addition to 327,048, [Class 39 (i), Electric lamps, Arc &c.]. [Class 39 (i).] Grids of the type described in the parent Specification are constructed of a core of a metal of high melting-point, preferably tungsten or molybdenum, which core is at least partly covered on its surface with zirconium. In one construction, zirconium wire 7 is wound helically over the core wire 6, The metal anode 1 forms part of the container. It is stated that the zirconium reduces secondary emission from the grid and acts as a getter during the manufacture of a valve. Specification 330,403, [Class 39 (i), .Electric lamps, Arc &c.], is referred to.
GB21788/31A 1930-11-22 1931-07-30 Improvements relating to electron discharge tubes or thermionic valves Expired GB370297A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL370297X 1930-11-22

Publications (1)

Publication Number Publication Date
GB370297A true GB370297A (en) 1932-04-07

Family

ID=19785532

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21788/31A Expired GB370297A (en) 1930-11-22 1931-07-30 Improvements relating to electron discharge tubes or thermionic valves

Country Status (1)

Country Link
GB (1) GB370297A (en)

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