FR2140236B1 - - Google Patents

Info

Publication number
FR2140236B1
FR2140236B1 FR7220102A FR7220102A FR2140236B1 FR 2140236 B1 FR2140236 B1 FR 2140236B1 FR 7220102 A FR7220102 A FR 7220102A FR 7220102 A FR7220102 A FR 7220102A FR 2140236 B1 FR2140236 B1 FR 2140236B1
Authority
FR
France
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
FR7220102A
Other languages
French (fr)
Other versions
FR2140236A1 (de
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.)
TDK Micronas GmbH
ITT Inc
Original Assignee
Deutsche ITT Industries GmbH
ITT Industries 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 Deutsche ITT Industries GmbH, ITT Industries Inc filed Critical Deutsche ITT Industries GmbH
Publication of FR2140236A1 publication Critical patent/FR2140236A1/fr
Application granted granted Critical
Publication of FR2140236B1 publication Critical patent/FR2140236B1/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/04—Electrodes; Screens; Shields
    • H01J61/06—Main electrodes
    • H01J61/067—Main electrodes for low-pressure discharge lamps
    • 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)
FR7220102A 1971-06-04 1972-06-05 Expired FR2140236B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US14997271A 1971-06-04 1971-06-04
US20448071A 1971-12-03 1971-12-03

Publications (2)

Publication Number Publication Date
FR2140236A1 FR2140236A1 (de) 1973-01-12
FR2140236B1 true FR2140236B1 (de) 1978-02-03

Family

ID=26847197

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7220102A Expired FR2140236B1 (de) 1971-06-04 1972-06-05

Country Status (1)

Country Link
FR (1) FR2140236B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5138224A (en) * 1990-12-04 1992-08-11 North American Philips Corporation Fluorescent low pressure discharge lamp having sintered electrodes

Also Published As

Publication number Publication date
FR2140236A1 (de) 1973-01-12

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Legal Events

Date Code Title Description
ST Notification of lapse