EP0056749A3 - Directly heated cathode and method of making it - Google Patents

Directly heated cathode and method of making it Download PDF

Info

Publication number
EP0056749A3
EP0056749A3 EP82400030A EP82400030A EP0056749A3 EP 0056749 A3 EP0056749 A3 EP 0056749A3 EP 82400030 A EP82400030 A EP 82400030A EP 82400030 A EP82400030 A EP 82400030A EP 0056749 A3 EP0056749 A3 EP 0056749A3
Authority
EP
European Patent Office
Prior art keywords
making
directly heated
heated cathode
cathode
directly
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.)
Granted
Application number
EP82400030A
Other languages
French (fr)
Other versions
EP0056749A2 (en
EP0056749B1 (en
Inventor
Guy Clerc
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.)
Thales SA
Original Assignee
Thomson CSF SA
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9254238&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0056749(A3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Thomson CSF SA filed Critical Thomson CSF SA
Publication of EP0056749A2 publication Critical patent/EP0056749A2/en
Publication of EP0056749A3 publication Critical patent/EP0056749A3/en
Application granted granted Critical
Publication of EP0056749B1 publication Critical patent/EP0056749B1/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
    • H01J1/14—Solid thermionic cathodes characterised by the material
EP82400030A 1981-01-16 1982-01-08 Directly heated cathode and method of making it Expired EP0056749B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8100782 1981-01-16
FR8100782A FR2498372A1 (en) 1981-01-16 1981-01-16 DIRECT HEATING CATHODE, METHOD FOR MANUFACTURING SAME, AND ELECTRONIC TUBE INCLUDING SUCH A CATHODE

Publications (3)

Publication Number Publication Date
EP0056749A2 EP0056749A2 (en) 1982-07-28
EP0056749A3 true EP0056749A3 (en) 1982-08-25
EP0056749B1 EP0056749B1 (en) 1984-10-17

Family

ID=9254238

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82400030A Expired EP0056749B1 (en) 1981-01-16 1982-01-08 Directly heated cathode and method of making it

Country Status (5)

Country Link
US (1) US4577134A (en)
EP (1) EP0056749B1 (en)
JP (1) JPS57138744A (en)
DE (1) DE3260969D1 (en)
FR (1) FR2498372A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3148441A1 (en) * 1981-12-08 1983-07-21 Philips Patentverwaltung Gmbh, 2000 Hamburg METHOD FOR PRODUCING A THERMIONIC CATHODE
US4810926A (en) * 1987-07-13 1989-03-07 Syracuse University Impregnated thermionic cathode
DE4026300A1 (en) * 1990-08-20 1992-02-27 Siemens Ag Electron emitter for X=ray tube - is of material contg. rare earth element covering support layer of large flat surface withstanding vibration
EP0637046B1 (en) * 1993-07-29 1998-04-01 Nec Corporation Thermoionic emissive cathode method of fabricating the same thermoionic emissive cathode and electron beam apparatus
FR2733856B1 (en) * 1995-05-05 1997-08-29 Thomson Tubes Electroniques CATHODE FOR GRID ELECTRON CANON, GRID TO BE ASSOCIATED WITH SUCH A CATHODE AND ELECTRON CANON INCLUDING SUCH CATHODE
FR2775118B1 (en) 1998-02-13 2000-05-05 Thomson Tubes Electroniques GRID FOR ELECTRONIC TUBE WITH AXIAL BEAM WITH IMPROVED PERFORMANCE
FR2789800B1 (en) 1999-02-16 2001-05-11 Thomson Tubes Electroniques VERY HIGH POWER RADIO FREQUENCY GENERATOR
DE102008020187A1 (en) * 2008-04-22 2009-10-29 Siemens Aktiengesellschaft Cathode, has flat emitter emitting electrons, and emission layer with circular cross section arranged on emitter, where material of emission layer has lower emission function than that of material of emitter
JP5881741B2 (en) * 2011-12-20 2016-03-09 株式会社東芝 Tungsten alloy and tungsten alloy parts, discharge lamp, transmitter tube and magnetron using the same
US20170330725A1 (en) * 2016-05-13 2017-11-16 Axcelis Technologies, Inc. Lanthanated tungsten ion source and beamline components

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2237303A1 (en) * 1973-07-09 1975-02-07 Bbc Brown Boveri & Cie
FR2290025A1 (en) * 1974-10-25 1976-05-28 Bbc Brown Boveri & Cie REACTION CATHODE
FR2398381A1 (en) * 1977-07-21 1979-02-16 Philips Nv ELECTRONIC TUBE CONTAINING AN INCANDESCENT CATHODE
US4143295A (en) * 1976-08-09 1979-03-06 Hitachi, Ltd. Cathode structure for an electron tube
EP0010128A1 (en) * 1978-08-31 1980-04-30 Siemens Aktiengesellschaft Directly heated cathode for an electron tube with coaxial electrode structure and method of making such a cathode
FR2445605A1 (en) * 1978-12-27 1980-07-25 Thomson Csf DIRECT HEATING CATHODE AND HIGH FREQUENCY ELECTRONIC TUBE COMPRISING SUCH A CATHODE

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3389977A (en) * 1964-08-05 1968-06-25 Texas Instruments Inc Tungsten carbide coated article of manufacture
US3719856A (en) * 1971-05-19 1973-03-06 O Koppius Impregnants for dispenser cathodes
NL175480C (en) * 1974-06-12 1984-11-01 Philips Nv ELECTRODE FOR A DISCHARGE LAMP, METHOD FOR MANUFACTURING SUCH ELECTRODE AND DISCHARGE LAMP PROVIDED WITH SUCH ELECTRODE.
US4019081A (en) * 1974-10-25 1977-04-19 Bbc Brown Boveri & Company Limited Reaction cathode

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2237303A1 (en) * 1973-07-09 1975-02-07 Bbc Brown Boveri & Cie
FR2290025A1 (en) * 1974-10-25 1976-05-28 Bbc Brown Boveri & Cie REACTION CATHODE
US4143295A (en) * 1976-08-09 1979-03-06 Hitachi, Ltd. Cathode structure for an electron tube
FR2398381A1 (en) * 1977-07-21 1979-02-16 Philips Nv ELECTRONIC TUBE CONTAINING AN INCANDESCENT CATHODE
EP0010128A1 (en) * 1978-08-31 1980-04-30 Siemens Aktiengesellschaft Directly heated cathode for an electron tube with coaxial electrode structure and method of making such a cathode
FR2445605A1 (en) * 1978-12-27 1980-07-25 Thomson Csf DIRECT HEATING CATHODE AND HIGH FREQUENCY ELECTRONIC TUBE COMPRISING SUCH A CATHODE

Also Published As

Publication number Publication date
EP0056749A2 (en) 1982-07-28
US4577134A (en) 1986-03-18
DE3260969D1 (en) 1984-11-22
FR2498372B1 (en) 1983-07-22
FR2498372A1 (en) 1982-07-23
JPS57138744A (en) 1982-08-27
EP0056749B1 (en) 1984-10-17

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