FR676233A - Improvements to incandescent electric lamps - Google Patents

Improvements to incandescent electric lamps

Info

Publication number
FR676233A
FR676233A FR676233DA FR676233A FR 676233 A FR676233 A FR 676233A FR 676233D A FR676233D A FR 676233DA FR 676233 A FR676233 A FR 676233A
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
Bertram Bernard Fenn
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 FR676233A publication Critical patent/FR676233A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/28—Envelopes; Vessels
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K9/00—Lamps having two or more incandescent bodies separately heated
    • H01K9/08—Lamps having two or more incandescent bodies separately heated to provide selectively different light effects, e.g. for automobile headlamp
FR676233D 1928-09-18 1929-06-05 Improvements to incandescent electric lamps Expired FR676233A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2672928A GB323017A (en) 1928-09-18 1928-09-18 Improvements relating to incandescent electric lamps

Publications (1)

Publication Number Publication Date
FR676233A true FR676233A (en) 1930-02-20

Family

ID=10248308

Family Applications (1)

Application Number Title Priority Date Filing Date
FR676233D Expired FR676233A (en) 1928-09-18 1929-06-05 Improvements to incandescent electric lamps

Country Status (3)

Country Link
DE (1) DE510226C (en)
FR (1) FR676233A (en)
GB (1) GB323017A (en)

Also Published As

Publication number Publication date
GB323017A (en) 1929-12-18
DE510226C (en) 1930-10-17

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