GB504893A - Improvements in or relating to electric incandescent lamps - Google Patents

Improvements in or relating to electric incandescent lamps

Info

Publication number
GB504893A
GB504893A GB28593/38A GB2859338A GB504893A GB 504893 A GB504893 A GB 504893A GB 28593/38 A GB28593/38 A GB 28593/38A GB 2859338 A GB2859338 A GB 2859338A GB 504893 A GB504893 A GB 504893A
Authority
GB
United Kingdom
Prior art keywords
bulb
pressure
excess
gas
diameter
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
GB28593/38A
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 GB504893A publication Critical patent/GB504893A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/28—Envelopes; Vessels
    • H01K1/34—Double wall vessels
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
GB28593/38A 1937-10-04 1938-10-01 Improvements in or relating to electric incandescent lamps Expired GB504893A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL205006X 1937-10-04

Publications (1)

Publication Number Publication Date
GB504893A true GB504893A (en) 1939-05-02

Family

ID=19778509

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28593/38A Expired GB504893A (en) 1937-10-04 1938-10-01 Improvements in or relating to electric incandescent lamps

Country Status (4)

Country Link
BE (1) BE430474A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH (1) CH205006A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR844304A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB504893A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2135820A (en) * 1983-02-25 1984-09-05 Gte Prod Corp Electric lamp with high outer-envelope to inner-envelope wall-thickness ratio

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2135820A (en) * 1983-02-25 1984-09-05 Gte Prod Corp Electric lamp with high outer-envelope to inner-envelope wall-thickness ratio

Also Published As

Publication number Publication date
BE430474A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH205006A (de) 1939-05-31
FR844304A (fr) 1939-07-24

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