FR717894A - Improvements to incandescent electric lamps - Google Patents

Improvements to incandescent electric lamps

Info

Publication number
FR717894A
FR717894A FR717894DA FR717894A FR 717894 A FR717894 A FR 717894A FR 717894D A FR717894D A FR 717894DA FR 717894 A FR717894 A FR 717894A
Authority
FR
France
Prior art keywords
electric lamps
incandescent electric
incandescent
lamps
electric
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
Andre-Irene Bossan
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 FR717894A publication Critical patent/FR717894A/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
FR717894D 1931-05-29 1931-05-29 Improvements to incandescent electric lamps Expired FR717894A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR717894T 1931-05-29

Publications (1)

Publication Number Publication Date
FR717894A true FR717894A (en) 1932-01-15

Family

ID=9090302

Family Applications (1)

Application Number Title Priority Date Filing Date
FR717894D Expired FR717894A (en) 1931-05-29 1931-05-29 Improvements to incandescent electric lamps

Country Status (1)

Country Link
FR (1) FR717894A (en)

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