GB518766A - Improvements in or relating to electric discharge devices - Google Patents

Improvements in or relating to electric discharge devices

Info

Publication number
GB518766A
GB518766A GB2497238A GB2497238A GB518766A GB 518766 A GB518766 A GB 518766A GB 2497238 A GB2497238 A GB 2497238A GB 2497238 A GB2497238 A GB 2497238A GB 518766 A GB518766 A GB 518766A
Authority
GB
United Kingdom
Prior art keywords
welded
nickel
electric discharge
splayed
carbonized
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
GB2497238A
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.)
Ferranti International PLC
Original Assignee
Ferranti 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 Ferranti PLC filed Critical Ferranti PLC
Priority to GB2497238A priority Critical patent/GB518766A/en
Publication of GB518766A publication Critical patent/GB518766A/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

  • Lasers (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Discharge Lamp (AREA)

Abstract

518,766. Thermionic valves. FERRANTI, Ltd., CHILCOT, A. L., and JACKSON, S. Aug. 25, 1938, No. 24972. [Class 39 (i)] [Also in Group XXII] In an electric discharge device comprising an electrode or other member of highly refractory metal having a part welded to a metal piece to which another part of the same or another member of highly refractory metal is also welded, the metal piece has at least one radiating fin attached thereto or provided integrally therewith so as to prevent melting or vaporising of the piece during subsequent processing of the valve. A folded strip c of nickel with carbonized surfaces may be welded between the flanges b of a cylindrical anode a of molybdenum for a transmitting valve and the free edges then splayed to form radiating fins d. In a modification the fins may be splayed along only a portion of their length, the remaining portions being bent to tubular form e to receive a nickel or nickel alloy support wire which is welded thereto. Two or more strips of carbonized nickel may be used to give increased radiation area.
GB2497238A 1938-08-25 1938-08-25 Improvements in or relating to electric discharge devices Expired GB518766A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2497238A GB518766A (en) 1938-08-25 1938-08-25 Improvements in or relating to electric discharge devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2497238A GB518766A (en) 1938-08-25 1938-08-25 Improvements in or relating to electric discharge devices

Publications (1)

Publication Number Publication Date
GB518766A true GB518766A (en) 1940-03-07

Family

ID=10220161

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2497238A Expired GB518766A (en) 1938-08-25 1938-08-25 Improvements in or relating to electric discharge devices

Country Status (1)

Country Link
GB (1) GB518766A (en)

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