FR854500A - Incandescent electric lamp with an operating pressure greater than 4 atomospheres - Google Patents

Incandescent electric lamp with an operating pressure greater than 4 atomospheres

Info

Publication number
FR854500A
FR854500A FR854500DA FR854500A FR 854500 A FR854500 A FR 854500A FR 854500D A FR854500D A FR 854500DA FR 854500 A FR854500 A FR 854500A
Authority
FR
France
Prior art keywords
atomospheres
operating pressure
pressure greater
electric lamp
incandescent electric
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 FR854500A publication Critical patent/FR854500A/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
FR854500D 1938-05-10 1939-05-09 Incandescent electric lamp with an operating pressure greater than 4 atomospheres Expired FR854500A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
FR854500A true FR854500A (en) 1940-04-16

Family

ID=6551324

Family Applications (1)

Application Number Title Priority Date Filing Date
FR854500D Expired FR854500A (en) 1938-05-10 1939-05-09 Incandescent electric lamp with an operating pressure greater than 4 atomospheres

Country Status (3)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0306269A2 (en) * 1987-08-28 1989-03-08 Gte Products Corporation Double-enveloped electric lamp

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4598225A (en) * 1983-02-25 1986-07-01 Gte Products Corporation Electric lamp with high outer-envelope to inner-envelope wall-thickness ratio

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0306269A2 (en) * 1987-08-28 1989-03-08 Gte Products Corporation Double-enveloped electric lamp
EP0306269A3 (en) * 1987-08-28 1991-01-23 Gte Products Corporation Double-enveloped electric lamp

Also Published As

Publication number Publication date
BE434243A (en)
GB521331A (en) 1940-05-17

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