GB505697A - Improvements in combinations of electric discharge devices with materials adapted to be excited to luminescence by the discharge - Google Patents

Improvements in combinations of electric discharge devices with materials adapted to be excited to luminescence by the discharge

Info

Publication number
GB505697A
GB505697A GB4205/38A GB420538A GB505697A GB 505697 A GB505697 A GB 505697A GB 4205/38 A GB4205/38 A GB 4205/38A GB 420538 A GB420538 A GB 420538A GB 505697 A GB505697 A GB 505697A
Authority
GB
United Kingdom
Prior art keywords
discharge
activated
luminescence
cadmium silicate
envelope
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
GB4205/38A
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.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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 Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Priority to GB4205/38A priority Critical patent/GB505697A/en
Publication of GB505697A publication Critical patent/GB505697A/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
    • C09K11/59—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
    • C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7759—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing samarium
    • C09K11/7765—Vanadates; Chromates; Molybdates; Tungstates
    • 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)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

505,697. Metal-vapour lamps. GENERAL ELECTRIC CO., Ltd. (Patent-Treuhand-Ges. f³r Electrische Gl³hlampen) Feb. 10, 1938, No. 4205. Addition to 466,503. [Class 39 (i)] In low pressure mercury vapour discharge apparatus in which the discharge excites to luminescence a material consisting mainly of activated cadmium silicate as described in the parent Specification, the cadmium silicate is activated by manganese, and is mixed with calcium . tungstate activated by 1-1 per cent of samarium. The amount of calcium tungstate is preferably 20-35 per cent by weight of the cadmium silicate. With a low pressure discharge operated at a current density of 100-500 mA/cm<3>., the material may be disposed on the interior surface of the envelope and gives approximately white light. With a current density of less than 100 mA/cm<2>., the ratio of light from the luminescent material will be greater, and the interposition of a yellow filter, such as by making the envelope of yellow glass, will result in an emitted light of golden-yellow colour. Specification 460,756, [Group XX], is referred to.
GB4205/38A 1938-02-10 1938-02-10 Improvements in combinations of electric discharge devices with materials adapted to be excited to luminescence by the discharge Expired GB505697A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4205/38A GB505697A (en) 1938-02-10 1938-02-10 Improvements in combinations of electric discharge devices with materials adapted to be excited to luminescence by the discharge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4205/38A GB505697A (en) 1938-02-10 1938-02-10 Improvements in combinations of electric discharge devices with materials adapted to be excited to luminescence by the discharge

Publications (1)

Publication Number Publication Date
GB505697A true GB505697A (en) 1939-05-16

Family

ID=9772705

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4205/38A Expired GB505697A (en) 1938-02-10 1938-02-10 Improvements in combinations of electric discharge devices with materials adapted to be excited to luminescence by the discharge

Country Status (1)

Country Link
GB (1) GB505697A (en)

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