GB408509A - Improvements in or relating to filaments of highly refractory material for electric incandescent lamps and discharge tubes - Google Patents

Improvements in or relating to filaments of highly refractory material for electric incandescent lamps and discharge tubes

Info

Publication number
GB408509A
GB408509A GB25112/33A GB2511233A GB408509A GB 408509 A GB408509 A GB 408509A GB 25112/33 A GB25112/33 A GB 25112/33A GB 2511233 A GB2511233 A GB 2511233A GB 408509 A GB408509 A GB 408509A
Authority
GB
United Kingdom
Prior art keywords
electric incandescent
incandescent lamps
refractory material
filament
discharge tubes
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
GB25112/33A
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 GB408509A publication Critical patent/GB408509A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
    • H01K3/02—Manufacture of incandescent bodies

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)
GB25112/33A 1932-10-13 1933-09-11 Improvements in or relating to filaments of highly refractory material for electric incandescent lamps and discharge tubes Expired GB408509A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR408509X 1932-10-13

Publications (1)

Publication Number Publication Date
GB408509A true GB408509A (en) 1934-04-12

Family

ID=8897430

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25112/33A Expired GB408509A (en) 1932-10-13 1933-09-11 Improvements in or relating to filaments of highly refractory material for electric incandescent lamps and discharge tubes

Country Status (3)

Country Link
BE (1) BE398598A (enrdf_load_stackoverflow)
FR (1) FR744122A (enrdf_load_stackoverflow)
GB (1) GB408509A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
BE398598A (enrdf_load_stackoverflow)
FR744122A (enrdf_load_stackoverflow) 1933-04-12

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