GB637539A - The coating of electric discharge lamps with luminescent material - Google Patents

The coating of electric discharge lamps with luminescent material

Info

Publication number
GB637539A
GB637539A GB21074/47A GB2107447A GB637539A GB 637539 A GB637539 A GB 637539A GB 21074/47 A GB21074/47 A GB 21074/47A GB 2107447 A GB2107447 A GB 2107447A GB 637539 A GB637539 A GB 637539A
Authority
GB
United Kingdom
Prior art keywords
per cent
added
electric discharge
discharge lamps
luminescent material
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
GB21074/47A
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.)
GTE Sylvania Inc
Original Assignee
Sylvania Electric Products Inc
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 Sylvania Electric Products Inc filed Critical Sylvania Electric Products Inc
Publication of GB637539A publication Critical patent/GB637539A/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
    • C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor

Landscapes

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

Abstract

637,539. Luminescent materials. SYLVANIA ELECTRIC PRODUCTS, Inc. Aug. 1, 1947, No. 21074. Convention date, June 22, 1946. [Class 39 (i)] Arsenious oxide is added to a coating suspension of luminescent material for electric discharge lamps. In one method, fluorescent powder is suspended in xylol to which ethyl cellulose and a plasticizer, such as di-methylphthalate, have been added. Arsenious oxide may be added directly or after it has been milled with ethyl cellulose and xylol, and this suspension is then applied to the lamp bulb which is then baked. The fluorescent powder may be zinc silicate, zinc berylium silicate and/or magnesium tungstate. The Specification contains a table showing the lumens per watt after specified operating times for lamp coatings in-which the content by weight of arsenious oxide is 0.05 per cent, 0.5 per cent and 5 per cent respectively and in which 0.5 per cent of arsenic oxide is used.
GB21074/47A 1946-06-22 1947-08-01 The coating of electric discharge lamps with luminescent material Expired GB637539A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US637539XA 1946-06-22 1946-06-22

Publications (1)

Publication Number Publication Date
GB637539A true GB637539A (en) 1950-05-24

Family

ID=22051269

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21074/47A Expired GB637539A (en) 1946-06-22 1947-08-01 The coating of electric discharge lamps with luminescent material

Country Status (1)

Country Link
GB (1) GB637539A (en)

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