GB840809A - Improvements in or relating to high pressure mercury vapour fluorescent electric discharge lamps - Google Patents

Improvements in or relating to high pressure mercury vapour fluorescent electric discharge lamps

Info

Publication number
GB840809A
GB840809A GB102557A GB102557A GB840809A GB 840809 A GB840809 A GB 840809A GB 102557 A GB102557 A GB 102557A GB 102557 A GB102557 A GB 102557A GB 840809 A GB840809 A GB 840809A
Authority
GB
United Kingdom
Prior art keywords
jacket
envelope
activated
manganese
zinc
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
GB102557A
Inventor
Alfred Hamilton Mckeag
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 GB102557A priority Critical patent/GB840809A/en
Publication of GB840809A publication Critical patent/GB840809A/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
    • H01J61/38—Devices for influencing the colour or wavelength of the light
    • H01J61/42—Devices for influencing the colour or wavelength of the light by transforming the wavelength of the light by luminescence
    • H01J61/44—Devices characterised by the luminescent material
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/0838—Aluminates; Silicates

Abstract

840,809. Discharge lamps; luminescent materials. GENERAL ELECTRIC CO. Ltd. Dec. 10, 1957 [Jan. 10, 1957], No. 1025/57. Class 39(1). A H.P. mercury vapour discharge lamp has a quartz discharge envelope 1 surrounded by a glass jacket 6 the inner surface of which is coated with a fluorescent material 12 consisting only of calcium orthosilicate or a calcium strontium orthosilicate activated by lead and manganese so as to be excitable by U.V. radiation of 2537‹A wave length, the jacket 6 being so small that in normal operation of the lamp the temperature attained by all or the greater part of the fluorescent material exceeds 250‹C. The jacket 6 can be of a generally ovoidal or cylindrical shape in which the tubular envelope 1 is supported coaxially and approximately centrally from the outer jacket. The filling of the envelope can include argon and metals such as cadmium or zinc besides mercury. The jacket 6 is filled with nitrogen at a pressure of about 200 mms. The electrodes 3 are of the activated tungsten-rod type each connected to one end of a molybdenum strip 4 embedded in a pinch 2. The envelope 1 is supported in the jacket 6 by a framework extending between the neck 9 and a recess 11 at the other end of the jacket, and the framework can carry a resistor through which an auxiliary electrode, associated with one electrode 3, is connected to the other elecelectrode 3. Dimensions of the envelope and jacket are stated. Known luminescent materials -zinc sulphide, zinc cadmium sulphide, barium strontium lithium silicate activated by cerium and manganese, magnesium arsenate activated by manganese and magnesium fluoro-germanate activated by manganese-are referred to.
GB102557A 1957-01-10 1957-01-10 Improvements in or relating to high pressure mercury vapour fluorescent electric discharge lamps Expired GB840809A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB102557A GB840809A (en) 1957-01-10 1957-01-10 Improvements in or relating to high pressure mercury vapour fluorescent electric discharge lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB102557A GB840809A (en) 1957-01-10 1957-01-10 Improvements in or relating to high pressure mercury vapour fluorescent electric discharge lamps

Publications (1)

Publication Number Publication Date
GB840809A true GB840809A (en) 1960-07-13

Family

ID=9714835

Family Applications (1)

Application Number Title Priority Date Filing Date
GB102557A Expired GB840809A (en) 1957-01-10 1957-01-10 Improvements in or relating to high pressure mercury vapour fluorescent electric discharge lamps

Country Status (1)

Country Link
GB (1) GB840809A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4439711A (en) * 1978-12-28 1984-03-27 Mitsubishi Denki Kabushiki Kaisha Metal vapor discharge lamp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4439711A (en) * 1978-12-28 1984-03-27 Mitsubishi Denki Kabushiki Kaisha Metal vapor discharge lamp

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