GB529934A - Improvements in and relating to electric discharge devices - Google Patents

Improvements in and relating to electric discharge devices

Info

Publication number
GB529934A
GB529934A GB17168/39A GB1716839A GB529934A GB 529934 A GB529934 A GB 529934A GB 17168/39 A GB17168/39 A GB 17168/39A GB 1716839 A GB1716839 A GB 1716839A GB 529934 A GB529934 A GB 529934A
Authority
GB
United Kingdom
Prior art keywords
cathode
shield
resistance
june
class
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
GB17168/39A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB529934A publication Critical patent/GB529934A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/02—Details
    • H01J17/04—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
    • H01J19/02—Electron-emitting electrodes; Cathodes
    • 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

Landscapes

  • Solid Thermionic Cathode (AREA)

Abstract

529,934. Thermionic valves. BRITISH THOMSON-HOUSTON CO., Ltd. June 12, 1939, No. 17168. Convention date, June 11, 1938. [Class 39 (i)'] In a thermionic valve containing a gas or metal vapour and having a cathode surrounded by a metal shield for retaining heat, such as that described in Specification 309,447, [Class 39 (i)], the shield is connected to the cathode through a considerable resistance, e.g. a resistance between a thousand and a million ohms. Figs. 1 and 2 show a cathode consisting of a number of radial vanes 1...6, preferably of gauze mounted on a central tube 7 containing a heater 8. The ends of the vanes are supported by rods 17...22 mounted on a base 13 which also supports through insulators 25, a metal shield 24, which may consist of a number of layers of nickel foil spaced from each other by protuberances and formed with a cover 14 and openings 26 for the passage of electrons. The shield is connected to the base 13 through a resistance 28. A modification with a directly heated cathode is also described.
GB17168/39A 1938-06-11 1939-06-12 Improvements in and relating to electric discharge devices Expired GB529934A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US529934XA 1938-06-11 1938-06-11

Publications (1)

Publication Number Publication Date
GB529934A true GB529934A (en) 1940-12-02

Family

ID=21981221

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17168/39A Expired GB529934A (en) 1938-06-11 1939-06-12 Improvements in and relating to electric discharge devices

Country Status (2)

Country Link
DE (1) DE908166C (en)
GB (1) GB529934A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1184020B (en) * 1962-04-30 1964-12-23 M O Valve Co Ltd Gas discharge tubes

Also Published As

Publication number Publication date
DE908166C (en) 1954-04-01

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