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FR778631A - Improvements to gas-filled incandescent electric lamps - Google Patents

Improvements to gas-filled incandescent electric lamps

Info

Publication number
FR778631A
FR778631A FR778631DA FR778631A FR 778631 A FR778631 A FR 778631A FR 778631D A FR778631D A FR 778631DA FR 778631 A FR778631 A FR 778631A
Authority
FR
France
Prior art keywords
gas
electric lamps
incandescent electric
filled incandescent
filled
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 FR778631A publication Critical patent/FR778631A/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
    • H01K1/00—Details
    • H01K1/50—Selection of substances for gas fillings; Specified pressure thereof
FR778631D 1933-10-03 1934-09-20 Improvements to gas-filled incandescent electric lamps Expired FR778631A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE429148X 1933-10-03

Publications (1)

Publication Number Publication Date
FR778631A true FR778631A (en) 1935-03-21

Family

ID=6477572

Family Applications (1)

Application Number Title Priority Date Filing Date
FR778631D Expired FR778631A (en) 1933-10-03 1934-09-20 Improvements to gas-filled incandescent electric lamps

Country Status (2)

Country Link
FR (1) FR778631A (en)
GB (1) GB429148A (en)

Also Published As

Publication number Publication date
GB429148A (en) 1935-05-24

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