GB488873A - Improvements in thermionic cathodes and discharge devices employing them - Google Patents

Improvements in thermionic cathodes and discharge devices employing them

Info

Publication number
GB488873A
GB488873A GB293537A GB293537A GB488873A GB 488873 A GB488873 A GB 488873A GB 293537 A GB293537 A GB 293537A GB 293537 A GB293537 A GB 293537A GB 488873 A GB488873 A GB 488873A
Authority
GB
United Kingdom
Prior art keywords
discharge devices
devices employing
thermionic cathodes
thermionic
recesses
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
GB293537A
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.)
RONALD OSMOND JENKINS
MO Valve Co Ltd
Original Assignee
RONALD OSMOND JENKINS
MO Valve 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 RONALD OSMOND JENKINS, MO Valve Co Ltd filed Critical RONALD OSMOND JENKINS
Priority to GB293537A priority Critical patent/GB488873A/en
Publication of GB488873A publication Critical patent/GB488873A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment

Landscapes

  • Electron Sources, Ion Sources (AREA)

Abstract

488,873. Thermionic valves. M-O VALVE CO., Ltd., BENJAMIN, M., and JENKINS, R. O. Feb. 1, 1937, No. 2935. [Class 39 (i)] The core 9 of a thermionic cathode is formed with recesses 10 into which is placed the emissive material 11, this not reaching to the tops of the recesses ; as a result the surfaces 13 remain free of the material 11 and emission only occurs in the gaps between the turns of the grid 12. The ends of long cathodes are similarly protected by ridges on the core.
GB293537A 1937-02-01 1937-02-01 Improvements in thermionic cathodes and discharge devices employing them Expired GB488873A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB293537A GB488873A (en) 1937-02-01 1937-02-01 Improvements in thermionic cathodes and discharge devices employing them

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB293537A GB488873A (en) 1937-02-01 1937-02-01 Improvements in thermionic cathodes and discharge devices employing them

Publications (1)

Publication Number Publication Date
GB488873A true GB488873A (en) 1938-07-15

Family

ID=9748825

Family Applications (1)

Application Number Title Priority Date Filing Date
GB293537A Expired GB488873A (en) 1937-02-01 1937-02-01 Improvements in thermionic cathodes and discharge devices employing them

Country Status (1)

Country Link
GB (1) GB488873A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2422469A (en) * 1945-07-09 1947-06-17 Edward A Coomes Electron emitting cathode

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2422469A (en) * 1945-07-09 1947-06-17 Edward A Coomes Electron emitting cathode

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