CH328590A - Thermionic cathode - Google Patents

Thermionic cathode

Info

Publication number
CH328590A
CH328590A CH328590DA CH328590A CH 328590 A CH328590 A CH 328590A CH 328590D A CH328590D A CH 328590DA CH 328590 A CH328590 A CH 328590A
Authority
CH
Switzerland
Prior art keywords
thermionic cathode
thermionic
cathode
Prior art date
Application number
Other languages
French (fr)
Inventor
William Beck Arnold Hugh
Butler Cutting Alan
Douglas Brisbane Alan
King George
Original Assignee
Standard Telephone & Radio Sa
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 Standard Telephone & Radio Sa filed Critical Standard Telephone & Radio Sa
Publication of CH328590A publication Critical patent/CH328590A/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
    • H01J1/20—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
    • H01J3/00—Details of electron-optical or ion-optical arrangements or of ion traps common to two or more basic types of discharge tubes or lamps
    • H01J3/02—Electron guns
    • H01J3/027—Construction of the gun or parts thereof
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Solid Thermionic Cathode (AREA)
  • Microwave Tubes (AREA)
  • Powder Metallurgy (AREA)
CH328590D 1953-08-14 1954-08-11 Thermionic cathode CH328590A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB328590X 1953-08-14
GB3013171X 1955-06-23

Publications (1)

Publication Number Publication Date
CH328590A true CH328590A (en) 1958-03-15

Family

ID=32396015

Family Applications (3)

Application Number Title Priority Date Filing Date
CH328590D CH328590A (en) 1953-08-14 1954-08-11 Thermionic cathode
CH337954D CH337954A (en) 1953-08-14 1955-11-17 Thermionic cathode
CH338908D CH338908A (en) 1953-08-14 1956-06-23 Thermionic cathode

Family Applications After (2)

Application Number Title Priority Date Filing Date
CH337954D CH337954A (en) 1953-08-14 1955-11-17 Thermionic cathode
CH338908D CH338908A (en) 1953-08-14 1956-06-23 Thermionic cathode

Country Status (7)

Country Link
US (2) US2912611A (en)
BE (3) BE544065A (en)
CH (3) CH328590A (en)
DE (1) DE1015941B (en)
FR (3) FR1113771A (en)
GB (1) GB750339A (en)
NL (1) NL97850C (en)

Families Citing this family (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3076915A (en) * 1954-12-24 1963-02-05 Egyesuelt Izzolampa Cathode assembly and method of making same
US3159461A (en) * 1958-10-20 1964-12-01 Bell Telephone Labor Inc Thermionic cathode
GB904505A (en) * 1958-11-25 1962-08-29 Harries Electronics Corp Ltd Improvements in or relating to electron discharge tubes for television, radar and the like
NL101694C (en) * 1959-03-06
US3113236A (en) * 1959-06-23 1963-12-03 Philips Corp Oxide dispenser type cathode
US3170772A (en) * 1961-01-05 1965-02-23 Tokyo Shibaura Electric Co Oxide coated cathodes for electron tubes
US3160780A (en) * 1961-01-17 1964-12-08 Philips Corp Indirectly heated cathode
NL136982C (en) * 1961-06-01
US3263115A (en) * 1962-05-23 1966-07-26 Gen Electric Dispenser cathode and method of manufacture
US3374385A (en) * 1963-07-10 1968-03-19 Rca Corp Electron tube cathode with nickel-tungsten alloy base and thin nickel coating
DE1255207B (en) * 1963-09-19 1967-11-30 Western Electric Co Matrix or layer cathode for glow cathode tubes
US3307241A (en) * 1963-10-14 1967-03-07 Litton Prec Products Inc Process for making cathodes
US3303378A (en) * 1964-06-17 1967-02-07 Chorney Paul Monolithic cathode structure
US3436583A (en) * 1966-03-15 1969-04-01 Gen Electric Electron gun
US3436584A (en) * 1966-03-15 1969-04-01 Gen Electric Electron emission source with sharply defined emitting area
NL6608782A (en) * 1966-06-24 1967-12-27
US3465400A (en) * 1967-02-01 1969-09-09 Varian Associates Method of making cylindrical mesh electrode for electron tubes
BE759247A (en) * 1969-11-22 1971-05-21 Philips Nv DEVICE EQUIPPED WITH AN ELECTRONIC TUBE, AND ELECTRONIC TUBE INTENDED FOR SUCH A DEVICE
US3803677A (en) * 1972-04-28 1974-04-16 Air Liquide Method for making cathodes for electron guns
US3835327A (en) * 1972-05-08 1974-09-10 United Aircraft Corp Triode electron gun for electron beam machines
US3974414A (en) * 1975-07-09 1976-08-10 Gte Sylvania Incorporated Cathode ray tube cathode
DE2808134A1 (en) * 1978-02-25 1979-08-30 Licentia Gmbh Long-life cathode with porous two layer emitter - has emitting layer thinner and of lower porosity than supporting layer
FR2525808A1 (en) * 1982-04-23 1983-10-28 Thomson Csf Thermo-electronic cathode with impregnated porous matrix - brazed to support via interposed compact layer
EP0146383B1 (en) * 1983-12-20 1992-08-26 Eev Limited Apparatus for forming electron beams
JPS63224127A (en) * 1987-03-11 1988-09-19 Hitachi Ltd Impregnated cathode
JPH0298921A (en) * 1988-10-05 1990-04-11 Fujitsu Ltd Electron gun and manufacture thereof aligner equipped with same electron gun and manufacture of semiconductor device using same aligner
FR2647257B1 (en) * 1989-05-19 1991-07-05 Thomson Tubes Electroniques IMPREGNATED CATHODE WITH REDUCED CAPACITY WITH APPLICATION TO BEAM INDEXING VISUALIZATION TUBES, AND ELECTRONIC TUBES COMPRISING SUCH A DEVICE
KR920008300B1 (en) * 1990-09-22 1992-09-26 삼성전관 주식회사 The method of manufacturing dispenser-type cathode
KR930007461B1 (en) * 1991-04-23 1993-08-11 주식회사 금성사 Method of making a dispenser type cathode
JPH0850849A (en) * 1994-05-31 1996-02-20 Nec Kansai Ltd Cathode member and electronic tube using it
JPH09147735A (en) * 1995-09-21 1997-06-06 Matsushita Electron Corp Cathode-ray tube emitter material and manufacture thereof
JPH11339633A (en) * 1997-11-04 1999-12-10 Sony Corp Impregnated cathode and manufacture therefor and electron gun and electronic tube

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2733378A (en) * 1956-01-31 Thermionic cathodes for electronic discharge devices
US1552310A (en) * 1923-07-24 1925-09-01 Gen Electric Electrode for discharge tubes
US1931254A (en) * 1928-02-28 1933-10-17 Electrons Inc Electronic tube
US2147447A (en) * 1936-09-21 1939-02-14 Siemens Ag Glow cathode
US2275886A (en) * 1941-04-30 1942-03-10 Gen Electric Process of activating cathodes
US2543439A (en) * 1945-05-02 1951-02-27 Edward A Coomes Method of manufacturing coated elements for electron tubes
US2492142A (en) * 1945-10-17 1949-12-27 Kenneth J Germeshausen Electric system embodying coldcathode gaseous discharge device
GB629126A (en) * 1947-04-14 1949-09-13 British Thomson Houston Co Ltd Improvements in and relating to cathodes for electric discharge devices
BE498869A (en) * 1949-10-25
US2640949A (en) * 1951-02-07 1953-06-02 Atomic Energy Commission Electron source
US2640950A (en) * 1951-06-06 1953-06-02 Atomic Energy Commission Point electron source
US2741717A (en) * 1951-06-14 1956-04-10 Siemens Ag Dispenser type cathode having gettercoated parts
NL91132C (en) * 1951-11-29
NL96177C (en) * 1952-02-27
BE526506A (en) * 1953-02-16
NL94233C (en) * 1954-12-06

Also Published As

Publication number Publication date
GB750339A (en) 1956-06-13
BE531122A (en)
US2912611A (en) 1959-11-10
US3013171A (en) 1961-12-12
CH337954A (en) 1959-04-30
FR1113771A (en) 1956-04-04
FR71337E (en) 1959-12-22
BE544065A (en)
CH338908A (en) 1959-06-15
DE1015941B (en) 1957-09-19
FR68247E (en) 1958-04-09
NL97850C (en)
BE548876A (en)

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