DE69012494T2 - Process for the production of a cathode. - Google Patents

Process for the production of a cathode.

Info

Publication number
DE69012494T2
DE69012494T2 DE69012494T DE69012494T DE69012494T2 DE 69012494 T2 DE69012494 T2 DE 69012494T2 DE 69012494 T DE69012494 T DE 69012494T DE 69012494 T DE69012494 T DE 69012494T DE 69012494 T2 DE69012494 T2 DE 69012494T2
Authority
DE
Germany
Prior art keywords
cathode
production
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 - Fee Related
Application number
DE69012494T
Other languages
German (de)
Other versions
DE69012494D1 (en
Inventor
Hisao Nakanishi
Kinjiro Sano
Toyokazu Kamata
Takashi Shinjo
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Application granted granted Critical
Publication of DE69012494D1 publication Critical patent/DE69012494D1/en
Publication of DE69012494T2 publication Critical patent/DE69012494T2/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • 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
    • H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
    • H01J1/28—Dispenser-type cathodes, e.g. L-cathode
    • 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
    • H01J9/042—Manufacture, activation of the emissive part
DE69012494T 1989-10-06 1990-10-03 Process for the production of a cathode. Expired - Fee Related DE69012494T2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26236889A JPH0828183B2 (en) 1989-10-06 1989-10-06 Electron tube cathode

Publications (2)

Publication Number Publication Date
DE69012494D1 DE69012494D1 (en) 1994-10-20
DE69012494T2 true DE69012494T2 (en) 1995-01-26

Family

ID=17374773

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69012494T Expired - Fee Related DE69012494T2 (en) 1989-10-06 1990-10-03 Process for the production of a cathode.

Country Status (4)

Country Link
EP (1) EP0421372B1 (en)
JP (1) JPH0828183B2 (en)
KR (1) KR940009756B1 (en)
DE (1) DE69012494T2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR930003229Y1 (en) * 1991-04-30 1993-06-03 주식회사 금성사 Heater structure of electronic gun for heat radiating type for crt tube
KR100449759B1 (en) * 2002-03-21 2004-09-22 삼성에스디아이 주식회사 Cathode for electron tube and preparing method thereof

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2726178A (en) * 1950-11-17 1955-12-06 Rca Corp Thermionic cathode with thoria coating
US4411827A (en) * 1981-03-18 1983-10-25 Corneille David M Coprecipitation process for thermionic cathode type materials
KR900007751B1 (en) * 1985-05-25 1990-10-19 미쯔비시덴끼 가부시기가이샤 Electron tube cathode and method of the same
JPS6222347A (en) * 1985-07-19 1987-01-30 Mitsubishi Electric Corp Cathode for electron tube
JPH0690907B2 (en) * 1988-02-02 1994-11-14 三菱電機株式会社 Electron tube cathode

Also Published As

Publication number Publication date
EP0421372B1 (en) 1994-09-14
JPH0828183B2 (en) 1996-03-21
KR910008766A (en) 1991-05-31
EP0421372A2 (en) 1991-04-10
JPH03127427A (en) 1991-05-30
KR940009756B1 (en) 1994-10-17
EP0421372A3 (en) 1991-11-21
DE69012494D1 (en) 1994-10-20

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8328 Change in the person/name/address of the agent

Free format text: PATENTANWAELTE REICHEL UND REICHEL, 60322 FRANKFURT

8339 Ceased/non-payment of the annual fee