GB1490213A - High pressure electric discharge lamps - Google Patents

High pressure electric discharge lamps

Info

Publication number
GB1490213A
GB1490213A GB2467274A GB2467274A GB1490213A GB 1490213 A GB1490213 A GB 1490213A GB 2467274 A GB2467274 A GB 2467274A GB 2467274 A GB2467274 A GB 2467274A GB 1490213 A GB1490213 A GB 1490213A
Authority
GB
United Kingdom
Prior art keywords
pressure
vapour
high pressure
halides
plus
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
GB2467274A
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB2467274A priority Critical patent/GB1490213A/en
Publication of GB1490213A publication Critical patent/GB1490213A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
    • H01J61/18—Selection of substances for gas fillings; Specified operating pressure or temperature having a metallic vapour as the principal constituent

Abstract

1490213 Metal vapour lamps GENERAL ELECTRIC CO Ltd 19 May 1975 [4 June 1974] 24672/74 Heading H1D In a high pressure Hg discharge lamp with refractory light transmitting discharge envelope, e.g. SiO 2 or Al 2 O 3 , the wall-stabilized arc running in Hg vapour plus a small quantity of rare gas, together with Na halide and T1 halides emitting in the blue-green, can be made to emit light nearer to black body radiation by increasing the Hg vapour pressure to 6-20 atmospheres at operating temperature. The fill may include 20 torr of Ar at ambient temperature plus Na and T1 iodides and Hg. The limits for Hg pressure lamp power and length depend on the material properties of the discharge envelope and the supply voltage. The use of the halides of Na and Tl also improves the luminous efficiency at the high Hg pressure.
GB2467274A 1975-05-19 1975-05-19 High pressure electric discharge lamps Expired GB1490213A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2467274A GB1490213A (en) 1975-05-19 1975-05-19 High pressure electric discharge lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2467274A GB1490213A (en) 1975-05-19 1975-05-19 High pressure electric discharge lamps

Publications (1)

Publication Number Publication Date
GB1490213A true GB1490213A (en) 1977-10-26

Family

ID=10215454

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2467274A Expired GB1490213A (en) 1975-05-19 1975-05-19 High pressure electric discharge lamps

Country Status (1)

Country Link
GB (1) GB1490213A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2000637A (en) * 1977-07-05 1979-01-10 Gen Electric High pressure metal vapor discharge lamps
WO2003054917A1 (en) * 2001-12-21 2003-07-03 Koninklijke Philips Electronics N.V. Ceramic high intensity discharge lamp

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2000637A (en) * 1977-07-05 1979-01-10 Gen Electric High pressure metal vapor discharge lamps
GB2000637B (en) * 1977-07-05 1982-03-03 Gen Electric High pressure metal vapour discharge lamps of improved efficacy
WO2003054917A1 (en) * 2001-12-21 2003-07-03 Koninklijke Philips Electronics N.V. Ceramic high intensity discharge lamp

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee