EP0081270A3 - Process for producing a thermionic cathode, and thermionic cathode manufactured by this process - Google Patents

Process for producing a thermionic cathode, and thermionic cathode manufactured by this process Download PDF

Info

Publication number
EP0081270A3
EP0081270A3 EP82201538A EP82201538A EP0081270A3 EP 0081270 A3 EP0081270 A3 EP 0081270A3 EP 82201538 A EP82201538 A EP 82201538A EP 82201538 A EP82201538 A EP 82201538A EP 0081270 A3 EP0081270 A3 EP 0081270A3
Authority
EP
European Patent Office
Prior art keywords
thermionic cathode
producing
manufactured
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.)
Granted
Application number
EP82201538A
Other languages
German (de)
Other versions
EP0081270B1 (en
EP0081270A2 (en
Inventor
Berthold Dr. Frank
Georg Dr. Gartner
Hans Dr. Lydtin
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.)
Koninklijke Philips NV
Original Assignee
Philips Patentverwaltung GmbH
Philips Gloeilampenfabrieken NV
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 Philips Patentverwaltung GmbH, Philips Gloeilampenfabrieken NV filed Critical Philips Patentverwaltung GmbH
Publication of EP0081270A2 publication Critical patent/EP0081270A2/en
Publication of EP0081270A3 publication Critical patent/EP0081270A3/en
Application granted granted Critical
Publication of EP0081270B1 publication Critical patent/EP0081270B1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/02—Manufacture of electrodes or electrode systems
    • H01J9/04—Manufacture of electrodes or electrode systems of thermionic cathodes
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Vapour Deposition (AREA)
  • Solid Thermionic Cathode (AREA)
EP82201538A 1981-12-08 1982-12-03 Process for producing a thermionic cathode, and thermionic cathode manufactured by this process Expired EP0081270B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813148441 DE3148441A1 (en) 1981-12-08 1981-12-08 METHOD FOR PRODUCING A THERMIONIC CATHODE
DE3148441 1981-12-08

Publications (3)

Publication Number Publication Date
EP0081270A2 EP0081270A2 (en) 1983-06-15
EP0081270A3 true EP0081270A3 (en) 1984-06-06
EP0081270B1 EP0081270B1 (en) 1986-12-03

Family

ID=6148121

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82201538A Expired EP0081270B1 (en) 1981-12-08 1982-12-03 Process for producing a thermionic cathode, and thermionic cathode manufactured by this process

Country Status (7)

Country Link
US (1) US4533852A (en)
EP (1) EP0081270B1 (en)
JP (1) JPS58106735A (en)
CA (1) CA1211737A (en)
DE (2) DE3148441A1 (en)
ES (1) ES8308449A1 (en)
HU (1) HU194646B (en)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3300449A1 (en) * 1983-01-08 1984-07-12 Philips Patentverwaltung Gmbh, 2000 Hamburg METHOD FOR PRODUCING AN ELECTRODE FOR A HIGH PRESSURE GAS DISCHARGE LAMP
EP0143222B1 (en) * 1983-09-30 1987-11-11 BBC Aktiengesellschaft Brown, Boveri & Cie. Thermionic cathode capable of high emission for an electron tube, and method of manufacture
NL8304401A (en) * 1983-12-22 1985-07-16 Philips Nv OXYD CATHODE.
DE3347036C2 (en) * 1983-12-24 1986-04-24 Fr. Kammerer GmbH, 7530 Pforzheim Process for coating substrates with metals
US4574219A (en) * 1984-05-25 1986-03-04 General Electric Company Lighting unit
DE3446334A1 (en) * 1984-12-19 1986-06-19 Philips Patentverwaltung Gmbh, 2000 Hamburg METHOD FOR PRODUCING <111> PREFERENTIAL TUNGSTEN
DE3622614A1 (en) * 1986-07-05 1988-01-14 Philips Patentverwaltung METHOD FOR PRODUCING ELECTRICALLY CONDUCTIVE MOLDED BODIES BY PLASMA-ACTIVATED CHEMICAL DEPOSITION FROM THE GAS PHASE
GB2202865A (en) * 1987-03-26 1988-10-05 Plessey Co Plc Thin film deposition process
DE3919724A1 (en) * 1989-06-16 1990-12-20 Philips Patentverwaltung METHOD FOR PRODUCING ERDALKALIMETALLY-CONTAINING AND / OR ERDALKALIMETALLOXIDE-CONTAINING MATERIALS
DE4113085A1 (en) * 1991-04-22 1992-10-29 Philips Patentverwaltung METHOD FOR PRODUCING A GLOWING CATHODE ELEMENT
DE4305558A1 (en) * 1993-02-24 1994-08-25 Asea Brown Boveri Process for the manufacture of wires which are especially suitable for cathodes of electron tubes
US5391523A (en) * 1993-10-27 1995-02-21 Marlor; Richard C. Electric lamp with lead free glass
DE4421793A1 (en) * 1994-06-22 1996-01-04 Siemens Ag Thermionic electron emitter used for electron tubes
US6071595A (en) * 1994-10-26 2000-06-06 The United States Of America As Represented By The National Aeronautics And Space Administration Substrate with low secondary emissions
FR2745951B1 (en) * 1996-03-05 1998-06-05 Thomson Csf THERMOIONIC CATHODE AND MANUFACTURING METHOD THEREOF
US5856726A (en) * 1996-03-15 1999-01-05 Osram Sylvania Inc. Electric lamp with a threaded electrode
TW398003B (en) * 1998-06-25 2000-07-11 Koninkl Philips Electronics Nv Electron tube comprising a semiconductor cathode
US6815876B1 (en) * 1999-06-23 2004-11-09 Agere Systems Inc. Cathode with improved work function and method for making the same
US6559582B2 (en) * 2000-08-31 2003-05-06 New Japan Radio Co., Ltd. Cathode and process for producing the same
KR20020068644A (en) * 2001-02-21 2002-08-28 삼성에스디아이 주식회사 Metal cathode and indirectly heated cathode assembly having the same
FR2863769B1 (en) 2003-12-12 2006-03-24 Ge Med Sys Global Tech Co Llc METHOD FOR MANUFACTURING CATHODE FILAMENT OF X-RAY TUBE AND X-RAY TUBE
US7795792B2 (en) * 2006-02-08 2010-09-14 Varian Medical Systems, Inc. Cathode structures for X-ray tubes
WO2009013685A1 (en) * 2007-07-24 2009-01-29 Philips Intellectual Property & Standards Gmbh Thermionic electron emitter, method for preparing same and x-ray source including same
US20090284124A1 (en) * 2008-04-22 2009-11-19 Wolfgang Kutschera Cathode composed of materials with different electron works functions
DE102008020164A1 (en) * 2008-04-22 2009-10-29 Siemens Aktiengesellschaft Cathode with a flat emitter
JP2017107816A (en) 2015-12-11 2017-06-15 株式会社堀場エステック Filament for thermal electron emission, quadrupole mass spectrometer, and method for analyzing residual gas
JP7176121B2 (en) * 2019-08-06 2022-11-21 株式会社東芝 Cathode parts for discharge lamps and discharge lamps

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB962926A (en) * 1962-03-19 1964-07-08 Rank Bush Murphy Ltd Improvements in thermionic cathodes and in methods of manufacturing such cathodes
DE1439890A1 (en) * 1963-06-03 1969-04-17 Varian Associates Thermionic emitter and process for its manufacture
FR2040505A1 (en) * 1969-04-30 1971-01-22 Gen Electric
FR2301914A1 (en) * 1975-02-21 1976-09-17 Philips Nv CATHODE A RESERVE
US4019081A (en) * 1974-10-25 1977-04-19 Bbc Brown Boveri & Company Limited Reaction cathode
GB1579249A (en) * 1977-05-18 1980-11-19 Denki Kagaku Kogyo Kk Thermionic cathodes

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2843517A (en) * 1955-03-24 1958-07-15 Sylvania Electric Prod Adhering coatings to cathode base metal
US3159461A (en) * 1958-10-20 1964-12-01 Bell Telephone Labor Inc Thermionic cathode
US3558966A (en) * 1967-03-01 1971-01-26 Semicon Associates Inc Directly heated dispenser cathode
US3488549A (en) * 1968-01-15 1970-01-06 Gen Electric Dispenser cathode material and method of manufacture
DE2822665A1 (en) * 1978-05-05 1979-11-08 Bbc Brown Boveri & Cie GLOW CATHODE MATERIAL
FR2475796A1 (en) * 1980-02-12 1981-08-14 Thomson Csf Directly heated cathode for high frequency electron tubes - using graphite substrate covered by inert metal, then tungsten impregnated with aluminate(s), followed by noble metal
FR2498372A1 (en) * 1981-01-16 1982-07-23 Thomson Csf DIRECT HEATING CATHODE, METHOD FOR MANUFACTURING SAME, AND ELECTRONIC TUBE INCLUDING SUCH A CATHODE

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB962926A (en) * 1962-03-19 1964-07-08 Rank Bush Murphy Ltd Improvements in thermionic cathodes and in methods of manufacturing such cathodes
DE1439890A1 (en) * 1963-06-03 1969-04-17 Varian Associates Thermionic emitter and process for its manufacture
FR2040505A1 (en) * 1969-04-30 1971-01-22 Gen Electric
US4019081A (en) * 1974-10-25 1977-04-19 Bbc Brown Boveri & Company Limited Reaction cathode
FR2301914A1 (en) * 1975-02-21 1976-09-17 Philips Nv CATHODE A RESERVE
GB1579249A (en) * 1977-05-18 1980-11-19 Denki Kagaku Kogyo Kk Thermionic cathodes

Also Published As

Publication number Publication date
US4533852A (en) 1985-08-06
ES517938A0 (en) 1983-08-16
ES8308449A1 (en) 1983-08-16
DE3274598D1 (en) 1987-01-15
JPH0354415B2 (en) 1991-08-20
HU194646B (en) 1988-02-29
EP0081270B1 (en) 1986-12-03
DE3148441A1 (en) 1983-07-21
JPS58106735A (en) 1983-06-25
EP0081270A2 (en) 1983-06-15
CA1211737A (en) 1986-09-23

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