FR967351A - Improvements in the manufacture of vacuum tubes - Google Patents

Improvements in the manufacture of vacuum tubes

Info

Publication number
FR967351A
FR967351A FR967351DA FR967351A FR 967351 A FR967351 A FR 967351A FR 967351D A FR967351D A FR 967351DA FR 967351 A FR967351 A FR 967351A
Authority
FR
France
Prior art keywords
manufacture
vacuum tubes
tubes
vacuum
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
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.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston SA
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
Priority claimed from US475626A external-priority patent/US2399004A/en
Application filed by Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Application granted granted Critical
Publication of FR967351A publication Critical patent/FR967351A/en
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
    • 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)
  • Solid Thermionic Cathode (AREA)
  • Electron Sources, Ion Sources (AREA)
FR967351D 1943-02-12 1947-03-20 Improvements in the manufacture of vacuum tubes Expired FR967351A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US475626A US2399004A (en) 1943-02-12 1943-02-12 Electric discharge device and method of fabrication
US528906A US2399005A (en) 1943-02-12 1944-03-31 Method of fabricating electric discharge devices

Publications (1)

Publication Number Publication Date
FR967351A true FR967351A (en) 1950-11-02

Family

ID=27044873

Family Applications (1)

Application Number Title Priority Date Filing Date
FR967351D Expired FR967351A (en) 1943-02-12 1947-03-20 Improvements in the manufacture of vacuum tubes

Country Status (3)

Country Link
US (1) US2399005A (en)
FR (1) FR967351A (en)
GB (1) GB650712A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR960822A (en) * 1947-02-08 1950-04-26
US2695442A (en) * 1947-08-26 1954-11-30 Hartford Nat Bank & Trust Co Method of manufacturing electric discharge tubes
US2693546A (en) * 1948-07-10 1954-11-02 Eitel Mccullough Inc Electron emitter for electron tubes
US3172002A (en) * 1960-11-21 1965-03-02 Rca Corp Cathode mount and method of fabrication
US3483609A (en) * 1967-10-31 1969-12-16 Gen Electric Incandescent lamp manufacture

Also Published As

Publication number Publication date
US2399005A (en) 1946-04-23
GB650712A (en) 1951-02-28

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