GB413950A - Improvements in or relating to oxide-coated cathodes for electron discharge tubes - Google Patents

Improvements in or relating to oxide-coated cathodes for electron discharge tubes

Info

Publication number
GB413950A
GB413950A GB34722/33A GB3472233A GB413950A GB 413950 A GB413950 A GB 413950A GB 34722/33 A GB34722/33 A GB 34722/33A GB 3472233 A GB3472233 A GB 3472233A GB 413950 A GB413950 A GB 413950A
Authority
GB
United Kingdom
Prior art keywords
oxide
copper
coating
cathodes
heating wire
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
GB34722/33A
Other languages
English (en)
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
Publication of GB413950A publication Critical patent/GB413950A/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
    • H01J1/14—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
    • H01J1/26—Supports for the emissive material

Landscapes

  • Solid Thermionic Cathode (AREA)
GB34722/33A 1932-12-10 1933-12-09 Improvements in or relating to oxide-coated cathodes for electron discharge tubes Expired GB413950A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL413950X 1932-12-10

Publications (1)

Publication Number Publication Date
GB413950A true GB413950A (en) 1934-07-26

Family

ID=19785999

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34722/33A Expired GB413950A (en) 1932-12-10 1933-12-09 Improvements in or relating to oxide-coated cathodes for electron discharge tubes

Country Status (3)

Country Link
BE (1) BE399790A (enrdf_load_stackoverflow)
FR (1) FR764126A (enrdf_load_stackoverflow)
GB (1) GB413950A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1777726A2 (en) 2005-10-21 2007-04-25 Rigaku Corporation Filament for X-ray tube and X-ray tube having the same

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE739644C (de) * 1939-04-02 1943-10-01 Sueddeutsche Telefon App Kabel Direkt oder indirekt geheizte Gluehkathode fuer Elektronenroehren
FR2573590B1 (fr) * 1984-11-20 1988-04-08 Infradep Dispositif de telecommande a infrarouge

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1777726A2 (en) 2005-10-21 2007-04-25 Rigaku Corporation Filament for X-ray tube and X-ray tube having the same
EP1777726A3 (en) * 2005-10-21 2009-10-21 Rigaku Corporation Filament for X-ray tube and X-ray tube having the same

Also Published As

Publication number Publication date
FR764126A (fr) 1934-05-15
BE399790A (enrdf_load_stackoverflow)

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