GB438910A - Improvements in electric discharge lamps - Google Patents

Improvements in electric discharge lamps

Info

Publication number
GB438910A
GB438910A GB24777/34A GB2477734A GB438910A GB 438910 A GB438910 A GB 438910A GB 24777/34 A GB24777/34 A GB 24777/34A GB 2477734 A GB2477734 A GB 2477734A GB 438910 A GB438910 A GB 438910A
Authority
GB
United Kingdom
Prior art keywords
zinc silicate
mixture
per cent
fluorescent
class
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
GB24777/34A
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 GB24777/34A priority Critical patent/GB438910A/en
Publication of GB438910A publication Critical patent/GB438910A/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
    • C09K11/67—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
    • 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
    • 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)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

438,910. Fluorescent screens. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London.-(Patent-Treuhand-Ges. f³r Elektrische Gl³hlampen; 11, Ehrenbergstrasse, Berlin) Aug. 28, 1934, No. 24777. [Class 98 (i)] [See also Group XL] An electric discharge lamp is provided on its inner wall with a layer of fluorescent material excited by radiation from the discharge and comprising a mixture of a modification of zinc silicate which fluoresces yellowish-white and of a material, such as calcium tungstate, which fluoresces blue, whereby a substantially white light is produced from the combination. The modified zinc silicate may contain manganese, possibly in the form of lower oxides. In an example a mixture of 93 per cent of the zinc silicate and 7 per cent of calcium tungstate is coated on the inner wall of a low pressure mercury lamp, the thickness of the layer being just sufficient to prevent transmission of ultra-violet radiation. According to the Provisional Specification the fluorescent mixture may be applied to the envelope or to a screen in front of the tube and may comprise 90-97 per cent of the zinc silicate. Specification 255,057, [Class 98 (i)], is referred to.
GB24777/34A 1934-08-28 1934-08-28 Improvements in electric discharge lamps Expired GB438910A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB24777/34A GB438910A (en) 1934-08-28 1934-08-28 Improvements in electric discharge lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB24777/34A GB438910A (en) 1934-08-28 1934-08-28 Improvements in electric discharge lamps

Publications (1)

Publication Number Publication Date
GB438910A true GB438910A (en) 1935-11-26

Family

ID=10217090

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24777/34A Expired GB438910A (en) 1934-08-28 1934-08-28 Improvements in electric discharge lamps

Country Status (1)

Country Link
GB (1) GB438910A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1026883B (en) * 1953-12-28 1958-03-27 Gen Electric Luminescent screen for cathode ray excitation and method of manufacturing such a screen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1026883B (en) * 1953-12-28 1958-03-27 Gen Electric Luminescent screen for cathode ray excitation and method of manufacturing such a screen

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