GB454348A - Improved device comprising an electric mercury-vapour discharge tube and a red-fluorescent layer - Google Patents

Improved device comprising an electric mercury-vapour discharge tube and a red-fluorescent layer

Info

Publication number
GB454348A
GB454348A GB2289/36A GB228936A GB454348A GB 454348 A GB454348 A GB 454348A GB 2289/36 A GB2289/36 A GB 2289/36A GB 228936 A GB228936 A GB 228936A GB 454348 A GB454348 A GB 454348A
Authority
GB
United Kingdom
Prior art keywords
fluorescent layer
red
discharge tube
improved device
vapour discharge
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
GB2289/36A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB454348A publication Critical patent/GB454348A/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
    • C09K11/025—Use of particular materials as binders, particle coatings or suspension media therefor non-luminescent particle coatings or suspension media
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
    • C03C3/091—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/33—Special shape of cross-section, e.g. for producing cool spot
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/52—Cooling arrangements; Heating arrangements; Means for circulating gas or vapour within the discharge space
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
    • H01J61/822—High-pressure mercury lamps

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Discharge Lamp (AREA)

Abstract

A high-pressure mercury vapour lamp of the kind described in Specification 431,451, [Group XL], is used with a fluorescent layer on the cap of the lantern the layer consisting of Rhodamine B. This is dissolved in a condensation product obtained by heating 3 mol. symmetric dimethylglycol and 2 mol. of citric acid for 3 hours at 150 DEG C. and then 3 hours at 180 DEG C. After cooling down 4 kgs. of this product is dissolved in 4 kgs. acetone in which mixture 10 grs. of the rhodamine is dispersed, this mixture being then applied to the cap.
GB2289/36A 1935-03-21 1936-01-24 Improved device comprising an electric mercury-vapour discharge tube and a red-fluorescent layer Expired GB454348A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEN37928A DE655233C (en) 1935-03-21 1935-03-21 Electric high-pressure mercury vapor discharge tubes with glow electrode (s), especially for emitting rays

Publications (1)

Publication Number Publication Date
GB454348A true GB454348A (en) 1936-09-29

Family

ID=25943644

Family Applications (2)

Application Number Title Priority Date Filing Date
GB2289/36A Expired GB454348A (en) 1935-03-21 1936-01-24 Improved device comprising an electric mercury-vapour discharge tube and a red-fluorescent layer
GB6855/36A Expired GB448685A (en) 1935-03-21 1936-03-06 Improvements in or relating to mercury-vapour electric discharge tubes

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB6855/36A Expired GB448685A (en) 1935-03-21 1936-03-06 Improvements in or relating to mercury-vapour electric discharge tubes

Country Status (4)

Country Link
US (1) US2094695A (en)
DE (2) DE655233C (en)
FR (1) FR803058A (en)
GB (2) GB454348A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10957827B2 (en) 2004-05-07 2021-03-23 Bruce H. Baretz Light emitting diode

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2682006A (en) * 1950-03-22 1954-06-22 Scopicon Inc Means for preventing external coating of water-cooled electric lamps
US20020145875A1 (en) * 2001-04-10 2002-10-10 Perkinelmer Optoelectronics N.C., Inc. Compact water-cooled multi-kilowatt lamp

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10957827B2 (en) 2004-05-07 2021-03-23 Bruce H. Baretz Light emitting diode
US11158768B2 (en) 2004-05-07 2021-10-26 Bruce H. Baretz Vacuum light emitting diode

Also Published As

Publication number Publication date
DE667160C (en) 1938-11-05
GB448685A (en) 1936-06-12
DE655233C (en) 1938-01-12
US2094695A (en) 1937-10-05
FR803058A (en) 1936-09-22

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