CH318053A - Process for the production of a cathode for electric discharge tubes - Google Patents

Process for the production of a cathode for electric discharge tubes

Info

Publication number
CH318053A
CH318053A CH318053DA CH318053A CH 318053 A CH318053 A CH 318053A CH 318053D A CH318053D A CH 318053DA CH 318053 A CH318053 A CH 318053A
Authority
CH
Switzerland
Prior art keywords
cathode
production
electric discharge
discharge tubes
tubes
Prior art date
Application number
Other languages
German (de)
Inventor
Levi Roberto
Collier Hughes Ray
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 CH318053A publication Critical patent/CH318053A/en

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
    • H01J9/042—Manufacture, activation of the emissive part
    • H01J9/047—Cathodes having impregnated bodies
    • 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
CH318053D 1952-02-27 1953-02-25 Process for the production of a cathode for electric discharge tubes CH318053A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US273607A US2700000A (en) 1952-02-27 1952-02-27 Thermionic cathode and method of manufacturing same

Publications (1)

Publication Number Publication Date
CH318053A true CH318053A (en) 1956-12-15

Family

ID=23044673

Family Applications (1)

Application Number Title Priority Date Filing Date
CH318053D CH318053A (en) 1952-02-27 1953-02-25 Process for the production of a cathode for electric discharge tubes

Country Status (9)

Country Link
US (1) US2700000A (en)
BE (1) BE517981A (en)
CH (1) CH318053A (en)
DE (1) DE1089483B (en)
ES (2) ES207960A1 (en)
FR (1) FR1077589A (en)
GB (1) GB734311A (en)
IT (1) IT500079A (en)
NL (1) NL96177C (en)

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE544065A (en) * 1953-08-14
US2899592A (en) * 1953-11-18 1959-08-11 coppola
US2813807A (en) * 1954-07-19 1957-11-19 Philips Corp Method of making a dispenser cathode
US3041209A (en) * 1955-06-28 1962-06-26 Gen Electric Method of making a thermionic cathode
BE559450A (en) * 1956-07-24
NL100722C (en) * 1956-10-24
BE563664A (en) * 1957-01-03
US3075066A (en) * 1957-12-03 1963-01-22 Union Carbide Corp Article of manufacture and method of making same
US2975320A (en) * 1958-12-03 1961-03-14 Rca Corp Low-temperature plasma source
US3076916A (en) * 1959-01-21 1963-02-05 Semicon Associates Inc Impregnated tungsten cathode structures and methods for fabricating same
US2995674A (en) * 1959-02-27 1961-08-08 Raytheon Co Impregnated cathodes
US3155864A (en) * 1960-03-21 1964-11-03 Gen Electric Dispenser cathode
NL266639A (en) * 1960-07-05
US3160780A (en) * 1961-01-17 1964-12-08 Philips Corp Indirectly heated cathode
US3258636A (en) * 1961-09-01 1966-06-28 Electron emitter with activator of sill cide, boride or carbide of solid solu- tion of barium and at least one other alkaline earth metal
NL6515843A (en) * 1965-12-07 1967-06-08
NL6602973A (en) * 1966-03-08 1967-09-11
US3514324A (en) * 1967-05-01 1970-05-26 Kopco Ind Tungsten coating of dispenser cathode
US3538570A (en) * 1968-02-28 1970-11-10 Otto G Koppius Thermionic dispenser cathode
US4097762A (en) * 1975-08-14 1978-06-27 International Telephone & Telegraph Corporation Xenon arc discharge lamp having a particular electrode composition and wherein the arc discharge is obtained without heating the electrode
US4636749A (en) * 1979-08-13 1987-01-13 Brunswick Corporation Pulsed magnetron tube having improved electron emitter assembly
US4377505A (en) * 1980-12-29 1983-03-22 General Electric Company Electrical resistor and fabrication thereof
FR2514945A1 (en) * 1981-10-20 1983-04-22 Thomson Csf Indirectly heated cathode e.g. for CRT - where thin tube made of refractory metal is used to carry pastille impregnated with emitter material, esp. barium scandate
WO1985002071A1 (en) * 1983-11-02 1985-05-09 Brunswick Corporation Tuning apparatus for a radio frequency power device
US4675570A (en) * 1984-04-02 1987-06-23 Varian Associates, Inc. Tungsten-iridium impregnated cathode
US5418070A (en) * 1988-04-28 1995-05-23 Varian Associates, Inc. Tri-layer impregnated cathode
KR920003185B1 (en) * 1990-01-31 1992-04-23 삼성전관 주식회사 Dispensor cathode and the manufacturing method of the same
JP2985467B2 (en) * 1992-01-22 1999-11-29 三菱電機株式会社 Method for producing impregnated cathode
DE19652822A1 (en) * 1996-12-18 1998-06-25 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Sintered electrode
US20090284124A1 (en) * 2008-04-22 2009-11-19 Wolfgang Kutschera Cathode composed of materials with different electron works functions

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL15389C (en) * 1923-01-12
CH159791A (en) * 1931-02-14 1933-01-31 Aeg Hot cathode for electrical discharge vessels.
US2389060A (en) * 1943-08-13 1945-11-13 Callite Tungsten Corp Refractory body of high electronic emission
US2547869A (en) * 1947-10-31 1951-04-03 Sylvania Electric Prod Fluorescent lamp electrode

Also Published As

Publication number Publication date
NL96177C (en)
US2700000A (en) 1955-01-18
FR1077589A (en) 1954-11-09
ES209589A1 (en) 1953-07-16
ES207960A1 (en) 1953-07-16
GB734311A (en) 1955-07-27
BE517981A (en)
IT500079A (en)
DE1089483B (en) 1960-09-22

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