CH554071A - CATHODE FOR AN ELECTRIC DISCHARGE TUBE. - Google Patents

CATHODE FOR AN ELECTRIC DISCHARGE TUBE.

Info

Publication number
CH554071A
CH554071A CH755273A CH755273A CH554071A CH 554071 A CH554071 A CH 554071A CH 755273 A CH755273 A CH 755273A CH 755273 A CH755273 A CH 755273A CH 554071 A CH554071 A CH 554071A
Authority
CH
Switzerland
Prior art keywords
cathode
electric discharge
discharge tube
tube
electric
Prior art date
Application number
CH755273A
Other languages
German (de)
Original Assignee
Philips 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 Nv filed Critical Philips Nv
Publication of CH554071A publication Critical patent/CH554071A/en

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
CH755273A 1972-05-30 1973-05-25 CATHODE FOR AN ELECTRIC DISCHARGE TUBE. CH554071A (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
CH554071A true CH554071A (en) 1974-09-13

Family

ID=19816154

Family Applications (1)

Application Number Title Priority Date Filing Date
CH755273A CH554071A (en) 1972-05-30 1973-05-25 CATHODE FOR AN ELECTRIC DISCHARGE TUBE.

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
US4168565A (en) * 1977-05-18 1979-09-25 Denki Kagaku Kogyo Kabushiki Kaisha Method for manufacturing thermionic cathode
US4137476A (en) * 1977-05-18 1979-01-30 Denki Kagaku Kogyo Kabushiki Kaisha 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
DE69409306T2 (en) * 1993-07-29 1998-07-30 Nippon Electric Co Thermally emitting cathode, manufacturing method of such a thermally emitting cathode and electron beam device
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
CA990777A (en) 1976-06-08
FR2186722A1 (en) 1974-01-11
NL7207276A (en) 1973-12-04
GB1378138A (en) 1974-12-18
JPS555660B2 (en) 1980-02-08
DE2325274C3 (en) 1981-07-09
SE382885B (en) 1976-02-16
DE2325274A1 (en) 1973-12-13
DE2325274B2 (en) 1980-10-23
FR2186722B1 (en) 1976-09-17
US3823337A (en) 1974-07-09
JPS4944662A (en) 1974-04-26

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Legal Events

Date Code Title Description
PL Patent ceased