CA990777A - Directly heated cathode - Google Patents

Directly heated cathode

Info

Publication number
CA990777A
CA990777A CA172,128A CA172128A CA990777A CA 990777 A CA990777 A CA 990777A CA 172128 A CA172128 A CA 172128A CA 990777 A CA990777 A CA 990777A
Authority
CA
Canada
Prior art keywords
directly heated
heated cathode
cathode
directly
heated
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
Application number
CA172,128A
Other versions
CA172128S (en
Inventor
Niranjan K. Mitra
Pieter Zalm
Antonius J.A. Van Stratum
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 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 Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of CA990777A publication Critical patent/CA990777A/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
    • H01J1/15—Cathodes heated directly by an electric current
    • 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
    • H01J1/148—Solid thermionic cathodes characterised by the material with compounds having metallic conductive properties, e.g. lanthanum boride, as an emissive material
CA172,128A 1972-05-30 1973-05-24 Directly heated cathode Expired CA990777A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7207276A NL7207276A (en) 1972-05-30 1972-05-30

Publications (1)

Publication Number Publication Date
CA990777A true CA990777A (en) 1976-06-08

Family

ID=19816154

Family Applications (1)

Application Number Title Priority Date Filing Date
CA172,128A Expired CA990777A (en) 1972-05-30 1973-05-24 Directly heated cathode

Country Status (9)

Country Link
US (1) US3823337A (en)
JP (1) JPS555660B2 (en)
CA (1) CA990777A (en)
CH (1) CH554071A (en)
DE (1) DE2325274C3 (en)
FR (1) FR2186722B1 (en)
GB (1) GB1378138A (en)
NL (1) NL7207276A (en)
SE (1) SE382885B (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4019081A (en) * 1974-10-25 1977-04-19 Bbc Brown Boveri & Company Limited Reaction cathode
JPS607335B2 (en) * 1974-11-29 1985-02-23 カナデイアン、パテンツ、アンド、デイベラツプメント、リミテツド thermionic emission cathode
US4055780A (en) * 1975-04-10 1977-10-25 National Institute For Researches In Inorganic Materials Thermionic emission cathode having a tip of a single crystal of lanthanum hexaboride
US4009409A (en) * 1975-09-02 1977-02-22 Gte Sylvania Incorporated Fast warmup cathode and method of making same
US4054946A (en) * 1976-09-28 1977-10-18 Bell Telephone Laboratories, Incorporated Electron source of a single crystal of lanthanum hexaboride emitting surface of (110) crystal plane
US4137476A (en) * 1977-05-18 1979-01-30 Denki Kagaku Kogyo Kabushiki Kaisha Thermionic cathode
US4168565A (en) * 1977-05-18 1979-09-25 Denki Kagaku Kogyo Kabushiki Kaisha Method for manufacturing thermionic cathode
US4258283A (en) * 1978-08-31 1981-03-24 Balzers Aktiengesellschaft Fur Hochvakuumtechnik Und Dunne Schichten Cathode for electron emission
FR2445605A1 (en) * 1978-12-27 1980-07-25 Thomson Csf DIRECT HEATING CATHODE AND HIGH FREQUENCY ELECTRONIC TUBE COMPRISING SUCH A CATHODE
JPS57196443A (en) * 1981-05-29 1982-12-02 Denki Kagaku Kogyo Kk Manufacture of hot cathode
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
JP2010157490A (en) * 2008-12-02 2010-07-15 Canon Inc Electron emitting element and display panel using the electron emitting element

Also Published As

Publication number Publication date
JPS555660B2 (en) 1980-02-08
NL7207276A (en) 1973-12-04
SE382885B (en) 1976-02-16
FR2186722A1 (en) 1974-01-11
GB1378138A (en) 1974-12-18
DE2325274A1 (en) 1973-12-13
US3823337A (en) 1974-07-09
JPS4944662A (en) 1974-04-26
CH554071A (en) 1974-09-13
FR2186722B1 (en) 1976-09-17
DE2325274B2 (en) 1980-10-23
DE2325274C3 (en) 1981-07-09

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