GB1449703A - High-pressure metal-vapour discharge lamp - Google Patents

High-pressure metal-vapour discharge lamp

Info

Publication number
GB1449703A
GB1449703A GB630074A GB630074A GB1449703A GB 1449703 A GB1449703 A GB 1449703A GB 630074 A GB630074 A GB 630074A GB 630074 A GB630074 A GB 630074A GB 1449703 A GB1449703 A GB 1449703A
Authority
GB
United Kingdom
Prior art keywords
amount
scandium
discharge lamp
group
iodide
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
GB630074A
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electronics Corp
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 Matsushita Electronics Corp filed Critical Matsushita Electronics Corp
Priority to GB630074A priority Critical patent/GB1449703A/en
Publication of GB1449703A publication Critical patent/GB1449703A/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

Landscapes

  • Discharge Lamp (AREA)

Abstract

1449703 Gas discharge lamps MATSUSHITA ELECTRONICS CORP 12 Feb 1974 06300/74 Heading H1D A high-pressure gas discharge lamp has in an alumina envelope a filling consisting of mercury, a rare gas and scandium iodide, bromide or chloride in an amount 1À80 x 10<SP>-7</SP> to 9À27 x 10<SP>-6</SP> gm. mole per c.c. and free scandium in an amount at least 3À1 times (in atomic ratio) the amount of scandium halide. The filling cam also include a halide of an alkali metal, of the titanium group, niobium group or rare earth group: particular examples are titanium iodide and sodium iodide. The rare gas pressure is typically 20 Torr.
GB630074A 1974-02-12 1974-02-12 High-pressure metal-vapour discharge lamp Expired GB1449703A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB630074A GB1449703A (en) 1974-02-12 1974-02-12 High-pressure metal-vapour discharge lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB630074A GB1449703A (en) 1974-02-12 1974-02-12 High-pressure metal-vapour discharge lamp

Publications (1)

Publication Number Publication Date
GB1449703A true GB1449703A (en) 1976-09-15

Family

ID=9811991

Family Applications (1)

Application Number Title Priority Date Filing Date
GB630074A Expired GB1449703A (en) 1974-02-12 1974-02-12 High-pressure metal-vapour discharge lamp

Country Status (1)

Country Link
GB (1) GB1449703A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1037258A1 (en) * 1998-02-20 2000-09-20 Matsushita Electric Industrial Co., Ltd. Mercury-free metal halide lamp

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1037258A1 (en) * 1998-02-20 2000-09-20 Matsushita Electric Industrial Co., Ltd. Mercury-free metal halide lamp
EP1037258A4 (en) * 1998-02-20 2006-08-09 Matsushita Electric Ind Co Ltd Mercury-free metal halide lamp

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PE20 Patent expired after termination of 20 years

Effective date: 19940211