GB929002A - Improvements in or relating to cathodes for electric discharge tubes - Google Patents

Improvements in or relating to cathodes for electric discharge tubes

Info

Publication number
GB929002A
GB929002A GB21554/60A GB2155460A GB929002A GB 929002 A GB929002 A GB 929002A GB 21554/60 A GB21554/60 A GB 21554/60A GB 2155460 A GB2155460 A GB 2155460A GB 929002 A GB929002 A GB 929002A
Authority
GB
United Kingdom
Prior art keywords
barium
layer
strontium oxide
cathodes
relating
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
GB21554/60A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries Ltd
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 Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB929002A publication Critical patent/GB929002A/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
    • H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
    • H01J1/28—Dispenser-type cathodes, e.g. L-cathode

Landscapes

  • Solid Thermionic Cathode (AREA)

Abstract

929,002. Thermionic cathodes. PHILIPS ELECTRICAL INDUSTRIES Ltd. June 20, 1960 [June 23, 1959], No. 21554/60. Class 39 (1). A cathode comprises a non-metallic emissive layer 5 activated by barium, with or without strontium, separated from a layer 3, delivering barium and including an oxidic compound, by a gauze or perforated foil 4 of nickel which does not contain Al, W, Si or Mg, and which is permeable to alkaline-earth metals, and which acts as the current supply for layer 5. The layer delivering barium may comprise an oxidic compound mixed with TiH 2 . As shown, layer 3 of barium-strontium oxide is contained in a recess in the end of a cylinder 1 of nickel which may contain admixtures such as Al, Si, W, Mg which can isolate barium from barium-strontium oxide. Layer 5 is of barium-strontium oxide, 70 microns thick, or may be of SrO, CaO or barium zirconate.
GB21554/60A 1959-06-23 1960-06-20 Improvements in or relating to cathodes for electric discharge tubes Expired GB929002A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL240535 1959-06-23

Publications (1)

Publication Number Publication Date
GB929002A true GB929002A (en) 1963-06-19

Family

ID=19751792

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21554/60A Expired GB929002A (en) 1959-06-23 1960-06-20 Improvements in or relating to cathodes for electric discharge tubes

Country Status (3)

Country Link
US (1) US3113236A (en)
CH (1) CH397092A (en)
GB (1) GB929002A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3454815A (en) * 1965-07-05 1969-07-08 Siemens Ag Indirectly heated dispenser cathode for electrical discharge tubes
US3710161A (en) * 1970-10-30 1973-01-09 Gen Electric Quick-heating impregnated planar cathode
GB2225158A (en) * 1988-11-12 1990-05-23 Samsung Electronic Devices Manufacturing dispenser cathodes of electron guns
GB2308495A (en) * 1995-12-20 1997-06-25 Lg Electronics Inc Cathodes

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3318716A (en) * 1962-09-11 1967-05-09 Pennsalt Chemicals Corp Foam reduction and coating
US3320463A (en) * 1962-07-23 1967-05-16 Gen Electric Electron discharge tube having an improved electrode mounting structure
US3842309A (en) * 1970-11-12 1974-10-15 Philips Corp Method of manufacturing a storage cathode and cathode manufactured by said method
US4400647A (en) * 1981-08-24 1983-08-23 North American Philips Consumer Electronics Corp. Cathode structure for cathode ray tubes and method
US4404492A (en) * 1981-08-24 1983-09-13 North American Philips Consumer Electronics Corp. Cathode structure for cathode ray tubes and method for producing same
US5092779A (en) * 1990-02-21 1992-03-03 Piwonka Dennis F Academic quiz controller

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA568817A (en) * 1959-01-13 C. Van Der Linden Petrus Thermionic cathode
US2131204A (en) * 1936-01-15 1938-09-27 Siemens Ag Indirectly heated thermionic cathode
BE486002A (en) * 1947-11-26
BE486753A (en) * 1948-01-15
BE515835A (en) * 1951-11-29
GB741369A (en) * 1952-10-22 1955-11-30 British Thomson Houston Co Ltd Improvements in and relating to thermionic cathodes
DE1046203B (en) * 1952-12-15 1958-12-11 Siemens Ag Storage cathode for electrical discharge vessels
NL97850C (en) * 1953-08-14
BE550302A (en) * 1955-08-15
DE1047320B (en) * 1956-04-21 1958-12-24 Gen Electric Process for the production of oxide cathodes for electrical discharge tubes, the carrier metal of which consists of pure nickel
US2945150A (en) * 1958-12-11 1960-07-12 Gen Electric Thermionic cathodes and methods of making
NL101694C (en) * 1959-03-06
US2965793A (en) * 1959-05-12 1960-12-20 Westinghouse Electric Corp Electron device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3454815A (en) * 1965-07-05 1969-07-08 Siemens Ag Indirectly heated dispenser cathode for electrical discharge tubes
US3710161A (en) * 1970-10-30 1973-01-09 Gen Electric Quick-heating impregnated planar cathode
GB2225158A (en) * 1988-11-12 1990-05-23 Samsung Electronic Devices Manufacturing dispenser cathodes of electron guns
GB2225158B (en) * 1988-11-12 1993-01-13 Samsung Electronic Devices Manufacturing method for dispenser cathode of an electron gun
GB2308495A (en) * 1995-12-20 1997-06-25 Lg Electronics Inc Cathodes
GB2308495B (en) * 1995-12-20 2000-08-30 Lg Electronics Inc A Cathode structure body and a method of coating an emitter

Also Published As

Publication number Publication date
US3113236A (en) 1963-12-03
CH397092A (en) 1965-08-15

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