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GB987461A - Thermionic valves - Google Patents

Thermionic valves

Info

Publication number
GB987461A
GB987461A GB2101762A GB2101762A GB987461A GB 987461 A GB987461 A GB 987461A GB 2101762 A GB2101762 A GB 2101762A GB 2101762 A GB2101762 A GB 2101762A GB 987461 A GB987461 A GB 987461A
Authority
GB
United Kingdom
Prior art keywords
secured
support
central support
radial
metal
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
GB2101762A
Inventor
Joshua John Behenna
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.)
STC PLC
Original Assignee
Standard Telephone and Cables 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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB2101762A priority Critical patent/GB987461A/en
Publication of GB987461A publication Critical patent/GB987461A/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
    • H01J1/15—Cathodes heated directly by an electric current
    • H01J1/18—Supports; Vibration-damping arrangements

Landscapes

  • Electron Sources, Ion Sources (AREA)
  • Microwave Tubes (AREA)

Abstract

987,461. Thermionic cathodes. STANDARD TELEPHONES & CABLES Ltd. May 31, 1962, No. 21017/62. Heading H1D. A directly-heated cathode comprises a tubular mesh 1 of oppositely-wound helical filaments supported at its ends by metal rings 2, 3, connected to a central support 8 and a supporting skirt 5, respectively. A metal band 13, Fig. 4, is secured to the inner surface of mesh 1, intermediate its ends, and is secured by radial supports 14 to a heat shield 9 surrounding the central support 8. As shown, ring 2 is secured by a spider of metal tapes to a radial flange on central support 8. Heat shield 9 is spaced from support 8 by three insulating brushes 10 at each end, through which pass wires 11 welded to support 8. Further heat shielding is provided by radial flanges 90 at the lower end of shield 9.
GB2101762A 1962-05-31 1962-05-31 Thermionic valves Expired GB987461A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2101762A GB987461A (en) 1962-05-31 1962-05-31 Thermionic valves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2101762A GB987461A (en) 1962-05-31 1962-05-31 Thermionic valves

Publications (1)

Publication Number Publication Date
GB987461A true GB987461A (en) 1965-03-31

Family

ID=10155787

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2101762A Expired GB987461A (en) 1962-05-31 1962-05-31 Thermionic valves

Country Status (1)

Country Link
GB (1) GB987461A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1278024B (en) * 1967-09-08 1968-09-19 Siemens Ag Mesh cathode for high-power electron tubes, especially transmission tubes
US3449616A (en) * 1965-07-20 1969-06-10 Thomson Houston Comp Francaise Tubular mesh cathode for high-power electronic tubes
US3473073A (en) * 1966-05-18 1969-10-14 Thomson Houston Comp Francaise Electron tube having an improved direct-heated cathode structure
US3560791A (en) * 1967-09-08 1971-02-02 Siemens Ag Mesh cathode for electron tubes
DE2304771A1 (en) * 1972-02-17 1973-08-23 Philips Nv ELECTRIC DISCHARGE TUBE WITH A DIRECT HEATABLE CATHODE
DE2247364A1 (en) * 1972-09-06 1974-03-14 Bbc Brown Boveri & Cie MESH CATHODE FOR ELECTRON TUBES
EP0101108A1 (en) * 1982-07-27 1984-02-22 BBC Aktiengesellschaft Brown, Boveri & Cie. Electronic tube, particularly an emitter tube
GB2143949A (en) * 1983-07-26 1985-02-20 Boc Group Plc Filament support

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3449616A (en) * 1965-07-20 1969-06-10 Thomson Houston Comp Francaise Tubular mesh cathode for high-power electronic tubes
US3473073A (en) * 1966-05-18 1969-10-14 Thomson Houston Comp Francaise Electron tube having an improved direct-heated cathode structure
DE1278024B (en) * 1967-09-08 1968-09-19 Siemens Ag Mesh cathode for high-power electron tubes, especially transmission tubes
US3560791A (en) * 1967-09-08 1971-02-02 Siemens Ag Mesh cathode for electron tubes
DE2304771A1 (en) * 1972-02-17 1973-08-23 Philips Nv ELECTRIC DISCHARGE TUBE WITH A DIRECT HEATABLE CATHODE
US3806753A (en) * 1972-02-17 1974-04-23 Philips Corp Electric discharge tube comprising a directly heatable cathode
DE2247364A1 (en) * 1972-09-06 1974-03-14 Bbc Brown Boveri & Cie MESH CATHODE FOR ELECTRON TUBES
EP0101108A1 (en) * 1982-07-27 1984-02-22 BBC Aktiengesellschaft Brown, Boveri & Cie. Electronic tube, particularly an emitter tube
US4546286A (en) * 1982-07-27 1985-10-08 Bbc Brown, Boveri & Company, Limited Electron tube, in particular a transmitter tube
GB2143949A (en) * 1983-07-26 1985-02-20 Boc Group Plc Filament support

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