GB521331A - Improvements in or relating to electric gasfilled incandescent lamps whose operatingpressure exceeds 4 atms - Google Patents

Improvements in or relating to electric gasfilled incandescent lamps whose operatingpressure exceeds 4 atms

Info

Publication number
GB521331A
GB521331A GB13767/39A GB1376739A GB521331A GB 521331 A GB521331 A GB 521331A GB 13767/39 A GB13767/39 A GB 13767/39A GB 1376739 A GB1376739 A GB 1376739A GB 521331 A GB521331 A GB 521331A
Authority
GB
United Kingdom
Prior art keywords
bulb
electric
operatingpressure
gasfilled
atms
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
GB13767/39A
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.)
Philips Lamps Ltd
Koninklijke Philips NV
Original Assignee
Philips Lamps Ltd
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 Lamps Ltd, Philips Gloeilampenfabrieken NV filed Critical Philips Lamps Ltd
Publication of GB521331A publication Critical patent/GB521331A/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

  • Resistance Heating (AREA)
GB13767/39A 1938-05-10 1939-05-08 Improvements in or relating to electric gasfilled incandescent lamps whose operatingpressure exceeds 4 atms Expired GB521331A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE521331X 1938-05-10

Publications (1)

Publication Number Publication Date
GB521331A true GB521331A (en) 1940-05-17

Family

ID=6551324

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13767/39A Expired GB521331A (en) 1938-05-10 1939-05-08 Improvements in or relating to electric gasfilled incandescent lamps whose operatingpressure exceeds 4 atms

Country Status (3)

Country Link
BE (1) BE434243A (enrdf_load_stackoverflow)
FR (1) FR854500A (enrdf_load_stackoverflow)
GB (1) GB521331A (enrdf_load_stackoverflow)

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

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1305995C (en) * 1987-08-28 1992-08-04 William M. Keeffe Double-enveloped lamp having a shield surrounding a light-source capsule within a thick-walled outer envelope

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
FR854500A (fr) 1940-04-16
BE434243A (enrdf_load_stackoverflow)

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