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FR1422700A - Thermionic cathode filament and method of manufacture - Google Patents

Thermionic cathode filament and method of manufacture

Info

Publication number
FR1422700A
FR1422700A FR3391A FR3391A FR1422700A FR 1422700 A FR1422700 A FR 1422700A FR 3391 A FR3391 A FR 3391A FR 3391 A FR3391 A FR 3391A FR 1422700 A FR1422700 A FR 1422700A
Authority
FR
France
Prior art keywords
manufacture
cathode filament
thermionic cathode
thermionic
filament
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
FR3391A
Other languages
French (fr)
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.)
Varian Medical Systems Inc
Original Assignee
Varian Associates Inc
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 Varian Associates Inc filed Critical Varian Associates Inc
Priority to FR3391A priority Critical patent/FR1422700A/en
Application granted granted Critical
Publication of FR1422700A publication Critical patent/FR1422700A/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
    • H01J1/22—Heaters
    • 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
    • H01J9/08—Manufacture of heaters for indirectly-heated cathodes

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
FR3391A 1965-01-26 1965-01-26 Thermionic cathode filament and method of manufacture Expired FR1422700A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR3391A FR1422700A (en) 1965-01-26 1965-01-26 Thermionic cathode filament and method of manufacture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR3391A FR1422700A (en) 1965-01-26 1965-01-26 Thermionic cathode filament and method of manufacture

Publications (1)

Publication Number Publication Date
FR1422700A true FR1422700A (en) 1965-12-24

Family

ID=8569312

Family Applications (1)

Application Number Title Priority Date Filing Date
FR3391A Expired FR1422700A (en) 1965-01-26 1965-01-26 Thermionic cathode filament and method of manufacture

Country Status (1)

Country Link
FR (1) FR1422700A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001099140A1 (en) * 2000-06-21 2001-12-27 Thomson Licensing S.A. Cathode with optimised thermal efficiency
FR2810790A1 (en) * 2000-06-21 2001-12-28 Thomson Tubes & Displays Cathode ray tube electron gun cathode having emissive section with metallic cap holding heating filament and side skirt section cap wall opening applied pad connection.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001099140A1 (en) * 2000-06-21 2001-12-27 Thomson Licensing S.A. Cathode with optimised thermal efficiency
FR2810789A1 (en) * 2000-06-21 2001-12-28 Thomson Tubes & Displays Cathode for electron gun includes reflective skirt beneath heating filament to direct heat energy on to emissive element
FR2810790A1 (en) * 2000-06-21 2001-12-28 Thomson Tubes & Displays Cathode ray tube electron gun cathode having emissive section with metallic cap holding heating filament and side skirt section cap wall opening applied pad connection.
US6946781B2 (en) 2000-06-21 2005-09-20 Thomson Licensing S.A. Cathode with optimized thermal efficiency

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