GB2268325B - Thermionic cathode structure - Google Patents

Thermionic cathode structure

Info

Publication number
GB2268325B
GB2268325B GB9213946A GB9213946A GB2268325B GB 2268325 B GB2268325 B GB 2268325B GB 9213946 A GB9213946 A GB 9213946A GB 9213946 A GB9213946 A GB 9213946A GB 2268325 B GB2268325 B GB 2268325B
Authority
GB
United Kingdom
Prior art keywords
cathode structure
thermionic cathode
thermionic
cathode
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 - Lifetime
Application number
GB9213946A
Other versions
GB2268325A (en
GB9213946D0 (en
Inventor
Richard Allan Tuck
William Taylor
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.)
EMI Group Electronics Ltd
Original Assignee
Thorn EMI Electronics 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 Thorn EMI Electronics Ltd filed Critical Thorn EMI Electronics Ltd
Priority to GB9213946A priority Critical patent/GB2268325B/en
Publication of GB9213946D0 publication Critical patent/GB9213946D0/en
Publication of GB2268325A publication Critical patent/GB2268325A/en
Application granted granted Critical
Publication of GB2268325B publication Critical patent/GB2268325B/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01J1/14—Solid thermionic cathodes characterised by the material
GB9213946A 1992-07-01 1992-07-01 Thermionic cathode structure Expired - Lifetime GB2268325B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9213946A GB2268325B (en) 1992-07-01 1992-07-01 Thermionic cathode structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9213946A GB2268325B (en) 1992-07-01 1992-07-01 Thermionic cathode structure

Publications (3)

Publication Number Publication Date
GB9213946D0 GB9213946D0 (en) 1992-08-12
GB2268325A GB2268325A (en) 1994-01-05
GB2268325B true GB2268325B (en) 1996-01-03

Family

ID=10718003

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9213946A Expired - Lifetime GB2268325B (en) 1992-07-01 1992-07-01 Thermionic cathode structure

Country Status (1)

Country Link
GB (1) GB2268325B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5646474A (en) * 1995-03-27 1997-07-08 Wayne State University Boron nitride cold cathode

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB820065A (en) * 1954-10-22 1959-09-16 Gen Electric Improvements relating to cathode structures for electric discharge devices
GB1039780A (en) * 1964-05-21 1966-08-24 Raytheon Co Cathode structure
GB1209078A (en) * 1967-04-10 1970-10-14 Siemens Ag Improvements in or relating to thermionic dispenser cathodes
GB1378733A (en) * 1972-04-28 1974-12-27 Tokyo Shibaura Electric Co Indirectly heated type cathode devices
US4268775A (en) * 1978-03-13 1981-05-19 Anthony J. Barraco Cathode-heater assembly and support structure therefor
EP0053867A1 (en) * 1980-12-09 1982-06-16 Thorn Emi-Varian Limited Thermionic electron emitters and methods of making them
EP0156454A1 (en) * 1984-02-24 1985-10-02 Thorn Emi-Varian Limited Thermionic electron emitter
EP0380205A1 (en) * 1989-01-23 1990-08-01 Varian Associates, Inc. Fast warm-up cathode for high power vacuum tubes
EP0389228A1 (en) * 1989-03-24 1990-09-26 Mitsubishi Denki Kabushiki Kaisha High temperature operating element

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB820065A (en) * 1954-10-22 1959-09-16 Gen Electric Improvements relating to cathode structures for electric discharge devices
GB1039780A (en) * 1964-05-21 1966-08-24 Raytheon Co Cathode structure
GB1209078A (en) * 1967-04-10 1970-10-14 Siemens Ag Improvements in or relating to thermionic dispenser cathodes
GB1378733A (en) * 1972-04-28 1974-12-27 Tokyo Shibaura Electric Co Indirectly heated type cathode devices
US4268775A (en) * 1978-03-13 1981-05-19 Anthony J. Barraco Cathode-heater assembly and support structure therefor
EP0053867A1 (en) * 1980-12-09 1982-06-16 Thorn Emi-Varian Limited Thermionic electron emitters and methods of making them
EP0156454A1 (en) * 1984-02-24 1985-10-02 Thorn Emi-Varian Limited Thermionic electron emitter
EP0380205A1 (en) * 1989-01-23 1990-08-01 Varian Associates, Inc. Fast warm-up cathode for high power vacuum tubes
EP0389228A1 (en) * 1989-03-24 1990-09-26 Mitsubishi Denki Kabushiki Kaisha High temperature operating element

Also Published As

Publication number Publication date
GB2268325A (en) 1994-01-05
GB9213946D0 (en) 1992-08-12

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Expiry date: 20120630