FR662203A - Improvements made in the establishment of two-filament electric lamps - Google Patents

Improvements made in the establishment of two-filament electric lamps

Info

Publication number
FR662203A
FR662203A FR662203DA FR662203A FR 662203 A FR662203 A FR 662203A FR 662203D A FR662203D A FR 662203DA FR 662203 A FR662203 A FR 662203A
Authority
FR
France
Prior art keywords
establishment
improvements made
electric lamps
filament electric
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
Maxime Leff
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 FR662203A publication Critical patent/FR662203A/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
FR662203D 1928-10-13 1928-10-13 Improvements made in the establishment of two-filament electric lamps Expired FR662203A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR662203T 1928-10-13

Publications (1)

Publication Number Publication Date
FR662203A true FR662203A (en) 1929-08-05

Family

ID=9011338

Family Applications (1)

Application Number Title Priority Date Filing Date
FR662203D Expired FR662203A (en) 1928-10-13 1928-10-13 Improvements made in the establishment of two-filament electric lamps

Country Status (1)

Country Link
FR (1) FR662203A (en)

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