EP0957505A3 - Dispositif de canon à électrons - Google Patents

Dispositif de canon à électrons Download PDF

Info

Publication number: EP0957505A3
Authority: EP; European Patent Office
Prior art keywords: electron gun; gun assembly; focus electrode; cathode; integral
Prior art date: 1998-05-09
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 Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Withdrawn

Application number

EP99303558A

Other languages

German (de)

English (en)

Other versions

EP0957505A2 (fr

Inventor

Steven Bardell

Alfred Christopher Thwaites

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.)

Teledyne UK Ltd

Original Assignee

EEV 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.)

1998-05-09

Filing date

1999-05-06

Publication date

2002-07-31

1999-05-06 Application filed by EEV Ltd filed Critical EEV Ltd

1999-11-17 Publication of EP0957505A2 publication Critical patent/EP0957505A2/fr

2002-07-31 Publication of EP0957505A3 publication Critical patent/EP0957505A3/fr

Status Withdrawn legal-status Critical Current

Links

OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 1
ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 abstract 1
229910002804 graphite Inorganic materials 0.000 abstract 1
239000010439 graphite Substances 0.000 abstract 1
229910052750 molybdenum Inorganic materials 0.000 abstract 1
239000011733 molybdenum Substances 0.000 abstract 1

Classifications

- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
- H01J23/02—Electrodes; Magnetic control means; Screens
- H01J23/06—Electron or ion guns
- H01J23/065—Electron or ion guns producing a solid cylindrical beam
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2225/00—Transit-time tubes, e.g. Klystrons, travelling-wave tubes, magnetrons
- H01J2225/02—Tubes with electron stream modulated in velocity or density in a modulator zone and thereafter giving up energy in an inducing zone, the zones being associated with one or more resonators
- H01J2225/04—Tubes having one or more resonators, without reflection of the electron stream, and in which the modulation produced in the modulator zone is mainly density modulation, e.g. Heaff tube

Landscapes

Electron Sources, Ion Sources (AREA)
Electrodes For Cathode-Ray Tubes (AREA)

EP99303558A 1998-05-09 1999-05-06 Dispositif de canon à électrons Withdrawn EP0957505A3 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
GBGB9809819.7A GB9809819D0 (en)	1998-05-09	1998-05-09	Electron gun assembly
GB9809819		1998-05-09

Publications (2)

Publication Number	Publication Date
EP0957505A2 EP0957505A2 (fr)	1999-11-17
EP0957505A3 true EP0957505A3 (fr)	2002-07-31

Family

ID=10831652

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP99303558A Withdrawn EP0957505A3 (fr)	1998-05-09	1999-05-06	Dispositif de canon à électrons

Country Status (3)

Country	Link
EP (1)	EP0957505A3 (fr)
CA (1)	CA2271253A1 (fr)
GB (2)	GB9809819D0 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US6664720B2 (en)	2001-04-23	2003-12-16	L-3 Communications Corporation	Temperature compensated gun
GB2386246B (en)	2001-11-01	2005-06-29	Marconi Applied Techn Ltd	Electron beam tube apparatus

Citations (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB1220630A (en) *	1967-08-23	1971-01-27	Raytheon Co	Improvements in electron guns
GB1353547A (en) *	1970-06-29	1974-05-22	Varian Associates	Electron tube
US3967150A (en) *	1975-01-31	1976-06-29	Varian Associates	Grid controlled electron source and method of making same
US4748369A (en) *	1986-04-10	1988-05-31	Star Microwave	Electron gun assembly useful with traveling wave tubes
GB2287579A (en) *	1994-03-16	1995-09-20	Eev Ltd	Electron gun arrangements
EP0945891A1 (fr) *	1998-03-24	1999-09-29	Eev Limited	Tubes à faisceau d'électrons

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2975315A (en) *	1957-03-13	1961-03-14	Rauland Corp	Cathode-ray tube
US3983446A (en) *	1971-07-06	1976-09-28	Varian Associates	Gridded convergent flow electron gun for linear beam tubes
GB2271020A (en) *	1992-09-24	1994-03-30	Eev Ltd	Electron gun arrangements

1998
- 1998-05-09 GB GBGB9809819.7A patent/GB9809819D0/en not_active Ceased
1999
- 1999-05-06 EP EP99303558A patent/EP0957505A3/fr not_active Withdrawn
- 1999-05-06 GB GB9910501A patent/GB2337152A/en not_active Withdrawn
- 1999-05-07 CA CA 2271253 patent/CA2271253A1/fr not_active Abandoned

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB1220630A (en) *	1967-08-23	1971-01-27	Raytheon Co	Improvements in electron guns
GB1353547A (en) *	1970-06-29	1974-05-22	Varian Associates	Electron tube
US3967150A (en) *	1975-01-31	1976-06-29	Varian Associates	Grid controlled electron source and method of making same
US4748369A (en) *	1986-04-10	1988-05-31	Star Microwave	Electron gun assembly useful with traveling wave tubes
GB2287579A (en) *	1994-03-16	1995-09-20	Eev Ltd	Electron gun arrangements
EP0945891A1 (fr) *	1998-03-24	1999-09-29	Eev Limited	Tubes à faisceau d'électrons

Also Published As

Publication number	Publication date
GB9910501D0 (en)	1999-07-07
GB2337152A (en)	1999-11-10
GB9809819D0 (en)	1998-07-08
EP0957505A2 (fr)	1999-11-17
CA2271253A1 (fr)	1999-11-09

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Legal Events

Date	Code	Title	Description
1999-10-01	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
1999-11-17	AK	Designated contracting states	Kind code of ref document: A2 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
1999-11-17	AX	Request for extension of the european patent	Free format text: AL;LT;LV;MK;RO;SI
2002-06-14	PUAL	Search report despatched	Free format text: ORIGINAL CODE: 0009013
2002-07-31	AK	Designated contracting states	Kind code of ref document: A3 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
2002-07-31	AX	Request for extension of the european patent	Free format text: AL;LT;LV;MK;RO;SI
2002-07-31	RIC1	Information provided on ipc code assigned before grant	Free format text: 7H 01J 21/10 A, 7H 01J 3/02 B
2003-04-23	AKX	Designation fees paid
2003-05-28	REG	Reference to a national code	Ref country code: DE Ref legal event code: 8566
2003-06-20	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN
2003-08-06	18D	Application deemed to be withdrawn	Effective date: 20021203