FR689240A - Fractional Filament Incandescent Electric Lamp - Google Patents

Fractional Filament Incandescent Electric Lamp

Info

Publication number
FR689240A
FR689240A FR689240DA FR689240A FR 689240 A FR689240 A FR 689240A FR 689240D A FR689240D A FR 689240DA FR 689240 A FR689240 A FR 689240A
Authority
FR
France
Prior art keywords
fractional
electric lamp
incandescent electric
filament incandescent
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
Benvenuto Marchi
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 FR689240A publication Critical patent/FR689240A/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
FR689240D 1930-02-01 1930-02-01 Fractional Filament Incandescent Electric Lamp Expired FR689240A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR689240T 1930-02-01

Publications (1)

Publication Number Publication Date
FR689240A true FR689240A (en) 1930-09-03

Family

ID=9027172

Family Applications (1)

Application Number Title Priority Date Filing Date
FR689240D Expired FR689240A (en) 1930-02-01 1930-02-01 Fractional Filament Incandescent Electric Lamp

Country Status (1)

Country Link
FR (1) FR689240A (en)

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