GB496143A - Improvements in electric discharge lamps comprising materials adapted to be excited to luminescence by radiation from the discharge - Google Patents

Improvements in electric discharge lamps comprising materials adapted to be excited to luminescence by radiation from the discharge

Info

Publication number
GB496143A
GB496143A GB1475337A GB1475337A GB496143A GB 496143 A GB496143 A GB 496143A GB 1475337 A GB1475337 A GB 1475337A GB 1475337 A GB1475337 A GB 1475337A GB 496143 A GB496143 A GB 496143A
Authority
GB
United Kingdom
Prior art keywords
materials
lamp
zinc
specified
luminescent
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
GB1475337A
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 GB1475337A priority Critical patent/GB496143A/en
Publication of GB496143A publication Critical patent/GB496143A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C09K11/56—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing sulfur
    • C09K11/562—Chalcogenides
    • C09K11/565—Chalcogenides with zinc cadmium
    • 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
    • C09K11/59—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing silicon
    • 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
    • C09K11/67—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing refractory metals
    • C09K11/68—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing refractory metals containing chromium, molybdenum or tungsten

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Luminescent Compositions (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

496,143. Discharge lamps; luminescent materials. GENERAL ELECTRIC CO., Ltd., RANDALL, J. T., and RYDE, J. W. May 27, 1937, No. 14753. [Class 39 (i)] [Also in Group XX] A discharge lamp consuming power W is enclosed within a sealed outer jacket coated internally with one or more specified luminescent materials and the surface area of the jacket is made so much greater than is indicated for power W in the Figure that when the lamp is operated with the bulb exposed freely to still air at 15‹ C. the output of the luminescent material is not less than 50 per cent of the output of the same material when maintained at 15‹ C. The specified materials are calcium, magnesium or zinc tungstates, cadmium silicate, zinc orthosilicate luminescing green or zinc-cadmium sulphide luminescing orange-red ; these materials show a considerable falling off in efficiency, both reversible and irreversible, when their temperature is raised above 200‹ C. and curves showing this effect are given. Other luminescent materials may be added to those specified, but the light from the added materials must not exceed that from the specified materials. The lamp may be a high-pressure mercury-vapour lamp consuming 80 watts, when the outer jacket coated with a mixture of calcium tungstate and zinc-cadmium sulphide may have a surface area of 708 cm.<2> ; if desired, the diameter may be still further increased to 15 or 20 cms., when the lamp is suitable for use by itself as a domestic lighting unit. Specifications 479,424; and 495,415, [Group XX] are referred to.
GB1475337A 1937-05-27 1937-05-27 Improvements in electric discharge lamps comprising materials adapted to be excited to luminescence by radiation from the discharge Expired GB496143A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1475337A GB496143A (en) 1937-05-27 1937-05-27 Improvements in electric discharge lamps comprising materials adapted to be excited to luminescence by radiation from the discharge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1475337A GB496143A (en) 1937-05-27 1937-05-27 Improvements in electric discharge lamps comprising materials adapted to be excited to luminescence by radiation from the discharge

Publications (1)

Publication Number Publication Date
GB496143A true GB496143A (en) 1938-11-25

Family

ID=10046880

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1475337A Expired GB496143A (en) 1937-05-27 1937-05-27 Improvements in electric discharge lamps comprising materials adapted to be excited to luminescence by radiation from the discharge

Country Status (1)

Country Link
GB (1) GB496143A (en)

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