GB335903A - Improvements in or relating to electric incandescent lamps - Google Patents

Improvements in or relating to electric incandescent lamps

Info

Publication number
GB335903A
GB335903A GB2019529A GB2019529A GB335903A GB 335903 A GB335903 A GB 335903A GB 2019529 A GB2019529 A GB 2019529A GB 2019529 A GB2019529 A GB 2019529A GB 335903 A GB335903 A GB 335903A
Authority
GB
United Kingdom
Prior art keywords
bulb
mercury
tungsten
helix
bulbs
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
GB2019529A
Other languages
English (en)
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
Publication of GB335903A publication Critical patent/GB335903A/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

Landscapes

  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
GB2019529A 1929-06-01 1929-07-01 Improvements in or relating to electric incandescent lamps Expired GB335903A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL46586A NL29070C (fr) 1929-06-01 1929-06-01

Publications (1)

Publication Number Publication Date
GB335903A true GB335903A (en) 1930-10-01

Family

ID=10141976

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2019529A Expired GB335903A (en) 1929-06-01 1929-07-01 Improvements in or relating to electric incandescent lamps

Country Status (4)

Country Link
BE (1) BE370025A (fr)
FR (1) FR695093A (fr)
GB (1) GB335903A (fr)
NL (1) NL29070C (fr)

Also Published As

Publication number Publication date
FR695093A (fr) 1930-12-11
NL29070C (fr) 1932-03-15
BE370025A (fr) 1930-06-30

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