FR670821A - Multiple filament electric lamp - Google Patents

Multiple filament electric lamp

Info

Publication number
FR670821A
FR670821A FR670821DA FR670821A FR 670821 A FR670821 A FR 670821A FR 670821D A FR670821D A FR 670821DA FR 670821 A FR670821 A FR 670821A
Authority
FR
France
Prior art keywords
electric lamp
multiple filament
filament electric
lamp
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
Other languages
French (fr)
Inventor
Jacques-Joseph-Andre Co Mercie
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 filed Critical
Application granted granted Critical
Publication of FR670821A publication Critical patent/FR670821A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K9/00—Lamps having two or more incandescent bodies separately heated
    • H01K9/02—Lamps having two or more incandescent bodies separately heated to provide substitution in the event of failure of one of the bodies
    • H01K9/04—Lamps having two or more incandescent bodies separately heated to provide substitution in the event of failure of one of the bodies with built-in manually operated switch
FR670821D 1929-03-02 1929-03-02 Multiple filament electric lamp Expired FR670821A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR670821T 1929-03-02

Publications (1)

Publication Number Publication Date
FR670821A true FR670821A (en) 1929-12-05

Family

ID=9016580

Family Applications (1)

Application Number Title Priority Date Filing Date
FR670821D Expired FR670821A (en) 1929-03-02 1929-03-02 Multiple filament electric lamp

Country Status (1)

Country Link
FR (1) FR670821A (en)

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