GB469731A - Improvements in or relating to combinations of electric discharge devices with materials excited to luminescence by the electric discharge - Google Patents

Improvements in or relating to combinations of electric discharge devices with materials excited to luminescence by the electric discharge

Info

Publication number
GB469731A
GB469731A GB2535/36A GB253536A GB469731A GB 469731 A GB469731 A GB 469731A GB 2535/36 A GB2535/36 A GB 2535/36A GB 253536 A GB253536 A GB 253536A GB 469731 A GB469731 A GB 469731A
Authority
GB
United Kingdom
Prior art keywords
phosphate
electric discharge
cadmium
luminescent
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
GB2535/36A
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 GB2535/36A priority Critical patent/GB469731A/en
Publication of GB469731A publication Critical patent/GB469731A/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
    • C09K11/70—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing phosphorus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Luminescent Compositions (AREA)

Abstract

469,731. Electric discharge lamps provided with luminescent screens. GENERAL ELECTRIC CO., Ltd., and RANDALL, J. T. Jan. 27, 1936, No. 2535. [Class 98 (i)] [Also in Group XL] A lamp filled with gas or vapour (e.g. a mixture of argon and mercury vapour) is combined with a luminescent medium consisting of a cadmium phosphate activated as with manganese so that it emits reddish luminescence, the lamp being caused to emit nearly white light by adjusting the proportion of the primary radiation of the mercury spectrum to the red radiation from the cadmium phosphate to maximum efficiency for example as described in Specification 460,890, [Group XL]. The screen may be exposed directly to the discharge or be separated from it by a solid transparent to short-wave radiation. The luminescent material is preferably prepared by precipitating the phosphate by reaction of ammonium phosphate with cadmium sulphate, adding 0À1 per cent of manganese in the form of chloride, drying and grinding the powder, and heating in the usual manner. In an alternative method, the phosphate is derived from a mixture of cadmium oxide and phosphoric acid. The material, after grinding and sieving if desired, may be attached to the support by phosphoric acid as binder, as described in Specification 460,756.
GB2535/36A 1936-01-27 1936-01-27 Improvements in or relating to combinations of electric discharge devices with materials excited to luminescence by the electric discharge Expired GB469731A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2535/36A GB469731A (en) 1936-01-27 1936-01-27 Improvements in or relating to combinations of electric discharge devices with materials excited to luminescence by the electric discharge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2535/36A GB469731A (en) 1936-01-27 1936-01-27 Improvements in or relating to combinations of electric discharge devices with materials excited to luminescence by the electric discharge

Publications (1)

Publication Number Publication Date
GB469731A true GB469731A (en) 1937-07-27

Family

ID=9741270

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2535/36A Expired GB469731A (en) 1936-01-27 1936-01-27 Improvements in or relating to combinations of electric discharge devices with materials excited to luminescence by the electric discharge

Country Status (1)

Country Link
GB (1) GB469731A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2463449A (en) * 1946-05-04 1949-03-01 Rca Corp Cadmium pyrophosphate phosphor
US2636010A (en) * 1951-04-05 1953-04-21 Gen Electric Luminescent materials and preparation thereof
US2697077A (en) * 1950-12-26 1954-12-14 Rca Corp Method of making a zinc phosphate phosphor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2463449A (en) * 1946-05-04 1949-03-01 Rca Corp Cadmium pyrophosphate phosphor
US2697077A (en) * 1950-12-26 1954-12-14 Rca Corp Method of making a zinc phosphate phosphor
US2636010A (en) * 1951-04-05 1953-04-21 Gen Electric Luminescent materials and preparation thereof

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