GB331231A - Improvements in and relating to thermionic valves - Google Patents

Improvements in and relating to thermionic valves

Info

Publication number
GB331231A
GB331231A GB3345028A GB3345028A GB331231A GB 331231 A GB331231 A GB 331231A GB 3345028 A GB3345028 A GB 3345028A GB 3345028 A GB3345028 A GB 3345028A GB 331231 A GB331231 A GB 331231A
Authority
GB
United Kingdom
Prior art keywords
grids
tungsten
anodes
anode
getter
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
GB3345028A
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.)
SAMUEL FREDERICK GAME
Original Assignee
SAMUEL FREDERICK GAME
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 SAMUEL FREDERICK GAME filed Critical SAMUEL FREDERICK GAME
Priority to GB3345028A priority Critical patent/GB331231A/en
Publication of GB331231A publication Critical patent/GB331231A/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
    • 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
    • H01J2893/0011—Non-emitting electrodes
    • 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

  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)

Abstract

331,231. Goulding, F. A., and Game, S. F. July 23, 1929. Vacuum tubes.-Thermionic valves having one or more cathodes, grids and anodes, and wherein the gas is removed from the anodes by electronic bombardment from the grids, are so constructed that the pure or thoriated tungsten grids are carried by refractory metallic supports situated between the leads carrying the heating current to the grids, the supports being attached to an insulating body of silica &c. Preferably the anodes are heated by induced currents prior to bombardment from the grids and, after sealing, a getter, such as zirconium, calcium or thorium, so mounted as to be unaffected by the prior heatjng of the anode, is volatilized in the envelope. The volatilization of the getter may be omitted, .or some may be carried on the anode for volatilization during evacuation. Fig. 1 shows one arrangement wherein the grid 4, surrounding the filamentary cathode 5, is made of tungsten and provided with conductors 7, 8 for a heating current, being supported from a silica &c. frame 6 by hooks 9 of tungsten &c. One of the conductors is dispensed with after the completion of the valve. Where two grids are employed they are arranged as shown in Figs. 2 and 3 on either side of the cathode 14 and within anode plates 15, each grid being constituted by a spiral filament 10 supported on a glass stem 11 by tungsten &c. hooks 13 and provided with leads 12.
GB3345028A 1929-07-23 1929-07-23 Improvements in and relating to thermionic valves Expired GB331231A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3345028A GB331231A (en) 1929-07-23 1929-07-23 Improvements in and relating to thermionic valves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3345028A GB331231A (en) 1929-07-23 1929-07-23 Improvements in and relating to thermionic valves

Publications (1)

Publication Number Publication Date
GB331231A true GB331231A (en) 1930-07-10

Family

ID=10353106

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3345028A Expired GB331231A (en) 1929-07-23 1929-07-23 Improvements in and relating to thermionic valves

Country Status (1)

Country Link
GB (1) GB331231A (en)

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