CH497783A - Method of manufacturing a cathode for a thermoelectronic discharge tube - Google Patents

Method of manufacturing a cathode for a thermoelectronic discharge tube

Info

Publication number
CH497783A
CH497783A CH249969A CH249969A CH497783A CH 497783 A CH497783 A CH 497783A CH 249969 A CH249969 A CH 249969A CH 249969 A CH249969 A CH 249969A CH 497783 A CH497783 A CH 497783A
Authority
CH
Switzerland
Prior art keywords
thermoelectronic
cathode
manufacturing
discharge tube
discharge
Prior art date
Application number
CH249969A
Other languages
French (fr)
Inventor
Edward Maloney Christopher
Original Assignee
English Electric Valve Co 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 English Electric Valve Co Ltd filed Critical English Electric Valve Co Ltd
Publication of CH497783A publication Critical patent/CH497783A/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
    • H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
    • H01J1/28—Dispenser-type cathodes, e.g. L-cathode

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Solid Thermionic Cathode (AREA)
  • Powder Metallurgy (AREA)
CH249969A 1968-02-19 1969-02-19 Method of manufacturing a cathode for a thermoelectronic discharge tube CH497783A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB792968A GB1174033A (en) 1968-02-19 1968-02-19 Improvements in or relating to Thermionic Discharge Tubes

Publications (1)

Publication Number Publication Date
CH497783A true CH497783A (en) 1970-10-15

Family

ID=9842497

Family Applications (1)

Application Number Title Priority Date Filing Date
CH249969A CH497783A (en) 1968-02-19 1969-02-19 Method of manufacturing a cathode for a thermoelectronic discharge tube

Country Status (5)

Country Link
CH (1) CH497783A (en)
DE (1) DE1908083A1 (en)
FR (1) FR2002173A1 (en)
GB (1) GB1174033A (en)
NL (1) NL6902484A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4165473A (en) * 1976-06-21 1979-08-21 Varian Associates, Inc. Electron tube with dispenser cathode
DE3642749A1 (en) * 1986-12-15 1988-06-23 Eltro Gmbh SURFACES FOR ELECTRICAL DISCHARGE
CA1272504A (en) * 1986-11-18 1990-08-07 Franz Prein Surface for electric discharge

Also Published As

Publication number Publication date
DE1908083A1 (en) 1969-09-04
NL6902484A (en) 1969-08-21
FR2002173A1 (en) 1969-10-17
GB1174033A (en) 1969-12-10

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Legal Events

Date Code Title Description
PL Patent ceased