GB493449A - Improvements in combinations of electric discharge devices with materials excited to luminescence by the discharge through them - Google Patents

Improvements in combinations of electric discharge devices with materials excited to luminescence by the discharge through them

Info

Publication number
GB493449A
GB493449A GB988937A GB988937A GB493449A GB 493449 A GB493449 A GB 493449A GB 988937 A GB988937 A GB 988937A GB 988937 A GB988937 A GB 988937A GB 493449 A GB493449 A GB 493449A
Authority
GB
United Kingdom
Prior art keywords
cadmium sulphide
calcium tungstate
discharge
envelope
luminescence
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
GB988937A
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 GB988937A priority Critical patent/GB493449A/en
Publication of GB493449A publication Critical patent/GB493449A/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
    • C09K11/67—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)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

493,449. Luminescent materials for discharge lamps. GENERAL ELECTRIC CO., Ltd., and RANDALL, J. T. April 7, 1937, No. 9889. Drawings to Specification. [Class 98 (i)] The luminescent material for a high-pressure metal-vapour electric discharge lamp having a quartz or like envelope, comprises zinc cadmium sulphide containing 20-40 per cent cadmium sulphide and activated, for example, by copper to emit orange red light, and calcium tungstate emitting blue light. The lamp is of the kind in which the emitted spectrum has a red ratio of ¢ to 4. The envelope has a transmission for the lines of the spectrum between 7000 and 2200 A.U. The calcium tungstate is excited mainly by radiation not longer than 3100 A.U. The mixture of equal parts of zinc-cadmium sulphide and calcium tungstate are coated at a density of À01 grm./sq. cm. Specifications 407,318, 410,114 ; 431,409, [Group XL], 457,126, and 474,907 are referred to.
GB988937A 1937-04-07 1937-04-07 Improvements in combinations of electric discharge devices with materials excited to luminescence by the discharge through them Expired GB493449A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB988937A GB493449A (en) 1937-04-07 1937-04-07 Improvements in combinations of electric discharge devices with materials excited to luminescence by the discharge through them

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB988937A GB493449A (en) 1937-04-07 1937-04-07 Improvements in combinations of electric discharge devices with materials excited to luminescence by the discharge through them

Publications (1)

Publication Number Publication Date
GB493449A true GB493449A (en) 1938-10-07

Family

ID=9880663

Family Applications (1)

Application Number Title Priority Date Filing Date
GB988937A Expired GB493449A (en) 1937-04-07 1937-04-07 Improvements in combinations of electric discharge devices with materials excited to luminescence by the discharge through them

Country Status (1)

Country Link
GB (1) GB493449A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2899583A (en) * 1959-08-11 macksoud

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2899583A (en) * 1959-08-11 macksoud

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