EP0003937A3 - Cathode for an electron gun - Google Patents

Cathode for an electron gun Download PDF

Info

Publication number: EP0003937A3
Authority: EP; European Patent Office
Prior art keywords: cathode; electron gun; gun; electron
Prior art date: 1978-03-01
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.): Granted

Application number

EP79400126A

Other languages

French (fr)

Other versions

EP0003937B1 (en

EP0003937A2 (en

Inventor

Gerard Marhic

Philippe Martin

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.)

Commissariat a lEnergie Atomique et aux Energies Alternatives CEA

Original Assignee

Commissariat a lEnergie Atomique CEA

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.)

1978-03-01

Filing date

1979-02-28

Publication date

1979-09-19

1979-02-28 Application filed by Commissariat a lEnergie Atomique CEA filed Critical Commissariat a lEnergie Atomique CEA

1979-09-05 Publication of EP0003937A2 publication Critical patent/EP0003937A2/en

1979-09-19 Publication of EP0003937A3 publication Critical patent/EP0003937A3/en

1980-10-15 Application granted granted Critical

1980-10-15 Publication of EP0003937B1 publication Critical patent/EP0003937B1/en

Status Expired legal-status Critical Current

Classifications

- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J3/00—Details of electron-optical or ion-optical arrangements or of ion traps common to two or more basic types of discharge tubes or lamps
- H01J3/02—Electron guns
- H01J3/027—Construction of the gun or parts thereof
- 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
- H01J1/16—Cathodes heated directly by an electric current characterised by the shape

EP79400126A 1978-03-01 1979-02-28 Cathode for an electron gun Expired EP0003937B1 (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
FR7805813A FR2418964A1 (en)	1978-03-01	1978-03-01	CATHODE FOR ELECTRONIC CANNON
FR7805813		1978-03-01

Publications (3)

Publication Number	Publication Date
EP0003937A2 EP0003937A2 (en)	1979-09-05
EP0003937A3 true EP0003937A3 (en)	1979-09-19
EP0003937B1 EP0003937B1 (en)	1980-10-15

Family

ID=9205196

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP79400126A Expired EP0003937B1 (en)	1978-03-01	1979-02-28	Cathode for an electron gun

Country Status (5)

Country	Link
US (1)	US4220889A (en)
EP (1)	EP0003937B1 (en)
JP (1)	JPS54125959A (en)
DE (1)	DE2960025D1 (en)
FR (1)	FR2418964A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2520553A1 (en) *	1982-01-22	1983-07-29	Cameca	ELECTRONIC OPTICAL APPARATUS COMPRISING PYROLYTIC GRAPHITE ELEMENTS
US4673842A (en) *	1985-09-03	1987-06-16	General Electric Company	Graphite cathode cup for gridded x-ray tubes
US5015908A (en) *	1989-01-23	1991-05-14	Varian Associates, Inc.	Fast warm-up cathode for high power vacuum tubes
US5480527A (en) *	1994-04-25	1996-01-02	Vapor Technologies, Inc.	Rectangular vacuum-arc plasma source
CN103094019A (en) *	2013-01-21	2013-05-08	江苏达胜加速器制造有限公司	Filament used for microcurrent electronic gun

Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR1514813A (en) *	1967-03-17	1968-02-23	Lokomotivbau Elektrotech	Large area massive cathode cathode cathode device in lanthanum hexaboride for electron ray generator
DE2008176A1 (en) *	1970-02-21	1971-09-09	Fernseh Gmbh	Holder for the indirectly heated cathode of a cathode ray system
FR2106968A5 (en) *	1970-09-30	1972-05-05	Cit Alcatel

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2498775A (en) *	1948-01-16	1950-02-28	Westinghouse Electric Corp	Cathode construction
US3440475A (en) *	1967-04-11	1969-04-22	Lokomotivbau Elektrotech	Lanthanum hexaboride cathode system for an electron beam generator
US3532923A (en) *	1969-03-17	1970-10-06	Ibm	Pyrolytic graphite support for lanthanum hexaboride cathode emitter
US3958146A (en) *	1974-02-08	1976-05-18	Gte Sylvania Incorporated	Fast warm up picture tube cathode cap having high heat emissivity surface on the interior thereof
JPS5277661A (en) *	1975-12-24	1977-06-30	Jeol Ltd	Electron gun

1978
- 1978-03-01 FR FR7805813A patent/FR2418964A1/en active Granted
1979
- 1979-02-26 US US06/014,832 patent/US4220889A/en not_active Expired - Lifetime
- 1979-02-28 DE DE7979400126T patent/DE2960025D1/en not_active Expired
- 1979-02-28 JP JP2207979A patent/JPS54125959A/en active Pending
- 1979-02-28 EP EP79400126A patent/EP0003937B1/en not_active Expired

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR1514813A (en) *	1967-03-17	1968-02-23	Lokomotivbau Elektrotech	Large area massive cathode cathode cathode device in lanthanum hexaboride for electron ray generator
DE2008176A1 (en) *	1970-02-21	1971-09-09	Fernseh Gmbh	Holder for the indirectly heated cathode of a cathode ray system
FR2106968A5 (en) *	1970-09-30	1972-05-05	Cit Alcatel

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
INSTRUMENTS AND EXPERIMENTAL TECHNIQUES, Vol. 18, No. 5, Septembre-Octobre 1975, New York: A.P. BATASHEV et al.: "A cathoderay cathode heater", Pages 1622-1624 *

Also Published As

Publication number	Publication date
JPS54125959A (en)	1979-09-29
US4220889A (en)	1980-09-02
FR2418964B1 (en)	1980-09-05
EP0003937B1 (en)	1980-10-15
EP0003937A2 (en)	1979-09-05
DE2960025D1 (en)	1981-01-22
FR2418964A1 (en)	1979-09-28

Publication	Publication Date	Title
HK62287A (en)	1987-09-04	Electron gun
GB2021854A (en)	1979-12-05	Field emission cathode
GB2027269B (en)	1982-08-25	In-line electron gun assembly
GB2027267B (en)	1982-08-11	Field emission electron gun
GB2057755B (en)	1984-05-10	Electron guns
AU537737B2 (en)	1984-07-12	Electron gun
GB2041637B (en)	1983-02-09	Oxide-coated cathode for electron tube
GB2030763B (en)	1982-10-06	Electron gun for cathode-ray tube
JPS5416974A (en)	1979-02-07	Electron gun
JPS56168316A (en)	1981-12-24	Electron gun
GB2031222B (en)	1982-10-06	Electron guns
GB2049270B (en)	1983-02-16	Electron gun
GB2040557B (en)	1983-05-25	Electron tube cathode
GB2027268B (en)	1982-09-22	Electron guns
JPS54145472A (en)	1979-11-13	Electron gun
JPS5636851A (en)	1981-04-10	Electron gun
DE2960025D1 (en)	1981-01-22	Cathode for an electron gun
GB2018508B (en)	1982-06-03	Field emission electron gun
GB2003655B (en)	1982-05-26	Cathode for electron emission
GB2015579B (en)	1982-08-04	Cathode for an electrolyser
JPS54140452A (en)	1979-10-31	Cathode heater assembly for electron emission device
GB2018504B (en)	1982-03-17	Directly heated cathode for electron tube
GB2090698B (en)	1984-08-30	Electron gun for high brightness
JPS5528298A (en)	1980-02-28	Cathode ceramic material for electron gun
JPS522373A (en)	1977-01-10	Cathode for electron gun

Legal Events

Date	Code	Title	Description
1979-07-10	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
1979-07-12	PUAL	Search report despatched	Free format text: ORIGINAL CODE: 0009013
1979-09-05	AK	Designated contracting states	Designated state(s): BE CH DE FR GB IT LU NL SE
1979-09-19	AK	Designated contracting states	Designated state(s): BE CH DE FR GB IT LU NL SE
1979-11-28	17P	Request for examination filed
1980-05-29	ITF	It: translation for a ep patent filed
1980-08-19	GRAA	(expected) grant	Free format text: ORIGINAL CODE: 0009210
1980-10-15	AK	Designated contracting states	Designated state(s): BE CH DE FR GB IT LU NL SE
1981-01-22	REF	Corresponds to:	Ref document number: 2960025 Country of ref document: DE Date of ref document: 19810122
1981-02-28	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19810228
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1987-10-14	GBPC	Gb: european patent ceased through non-payment of renewal fee
1987-10-16	NLV4	Nl: lapsed or anulled due to non-payment of the annual fee
1987-10-30	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19871030
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2016-09-14	PLBE	No opposition filed within time limit	Free format text: ORIGINAL CODE: 0009261
2016-09-14	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT