FR770380A - Electric incandescent lamp with a gaseous atmosphere intended more particularly for photography - Google Patents

Electric incandescent lamp with a gaseous atmosphere intended more particularly for photography

Info

Publication number
FR770380A
FR770380A FR770380DA FR770380A FR 770380 A FR770380 A FR 770380A FR 770380D A FR770380D A FR 770380DA FR 770380 A FR770380 A FR 770380A
Authority
FR
France
Prior art keywords
photography
incandescent lamp
gaseous atmosphere
electric incandescent
atmosphere intended
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)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of FR770380A publication Critical patent/FR770380A/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
FR770380D 1933-02-18 1934-02-17 Electric incandescent lamp with a gaseous atmosphere intended more particularly for photography Expired FR770380A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE770380X 1933-02-18

Publications (1)

Publication Number Publication Date
FR770380A true FR770380A (en) 1934-09-13

Family

ID=6675293

Family Applications (1)

Application Number Title Priority Date Filing Date
FR770380D Expired FR770380A (en) 1933-02-18 1934-02-17 Electric incandescent lamp with a gaseous atmosphere intended more particularly for photography

Country Status (2)

Country Link
BE (1) BE401505A (en)
FR (1) FR770380A (en)

Also Published As

Publication number Publication date
BE401505A (en)

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