FR1179378A - Procédé d'application de couches de carbonates alcalino-terreux sur des corps cathodiques et cathodes émissives réalisées suivant ce procédé - Google Patents

Procédé d'application de couches de carbonates alcalino-terreux sur des corps cathodiques et cathodes émissives réalisées suivant ce procédé

Info

Publication number
FR1179378A
FR1179378A FR1179378DA FR1179378A FR 1179378 A FR1179378 A FR 1179378A FR 1179378D A FR1179378D A FR 1179378DA FR 1179378 A FR1179378 A FR 1179378A
Authority
FR
France
Prior art keywords
alkaline earth
produced according
earth carbonates
applying layers
cathode bodies
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
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
Application granted granted Critical
Publication of FR1179378A publication Critical patent/FR1179378A/fr
Expired legal-status Critical Current

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Electrodes For Compound Or Non-Metal Manufacture (AREA)
FR1179378D 1957-09-20 1957-06-03 Procédé d'application de couches de carbonates alcalino-terreux sur des corps cathodiques et cathodes émissives réalisées suivant ce procédé Expired FR1179378A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2965057A GB820915A (en) 1957-09-20 1957-09-20 Improvements in or relating to the manufacture of thermionic cathodes

Publications (1)

Publication Number Publication Date
FR1179378A true FR1179378A (fr) 1959-05-22

Family

ID=10294916

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1179378D Expired FR1179378A (fr) 1957-09-20 1957-06-03 Procédé d'application de couches de carbonates alcalino-terreux sur des corps cathodiques et cathodes émissives réalisées suivant ce procédé

Country Status (3)

Country Link
BE (1) BE558059A (fr)
FR (1) FR1179378A (fr)
GB (1) GB820915A (fr)

Also Published As

Publication number Publication date
BE558059A (fr) 1957-12-03
GB820915A (en) 1959-09-30

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