GB1272413A - Lamp - Google Patents

Lamp

Info

Publication number
GB1272413A
GB1272413A GB09304/69A GB1930469A GB1272413A GB 1272413 A GB1272413 A GB 1272413A GB 09304/69 A GB09304/69 A GB 09304/69A GB 1930469 A GB1930469 A GB 1930469A GB 1272413 A GB1272413 A GB 1272413A
Authority
GB
United Kingdom
Prior art keywords
phosphors
phosphor
envelope
april
emission
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
GB09304/69A
Inventor
Eric John George Beeson
Horace Edward Stanyon
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.)
Thorn Lighting Ltd
Original Assignee
Thorn Lighting Ltd
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 Thorn Lighting Ltd filed Critical Thorn Lighting Ltd
Priority to GB09304/69A priority Critical patent/GB1272413A/en
Priority to US27876A priority patent/US3634715A/en
Publication of GB1272413A publication Critical patent/GB1272413A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • H01J61/48—Separate coatings of different luminous materials

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

1,272,413. Metal-vapour lamps. THORN LIGHTING Ltd. 15 April, 1970 [15 April, 1969], No. 19304/69. Heading H1D. A discharge lamp comprises a first phosphor whose light emission is greater at a high temperature than a low temperature and a second phosphor whose emission is greater at a low temperature than at a high temperature provided at different regions of the lamp envelope whereby the first phosphor operates at a higher temperature than the second. The first and second phosphors respectively may be europium activated yttrium-vanadate and manganese activated magnesium fluorogermanate with the first phosphor being coated on the uppermost part of the envelope and thus at the higher temperature. Two embodiments are described in which the phosphors are coated on the inner surface of an envelope containing a mercury-arc tube. The phosphors provide emission in bands of the visible spectrum in which the mercury spectrum is deficient. Additional phosphors, e.g. europium activated strontium silicate, may be provided.
GB09304/69A 1969-04-15 1969-04-15 Lamp Expired GB1272413A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB09304/69A GB1272413A (en) 1969-04-15 1969-04-15 Lamp
US27876A US3634715A (en) 1969-04-15 1970-04-13 Lamp having two separate phosphor coatings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB09304/69A GB1272413A (en) 1969-04-15 1969-04-15 Lamp

Publications (1)

Publication Number Publication Date
GB1272413A true GB1272413A (en) 1972-04-26

Family

ID=10127172

Family Applications (1)

Application Number Title Priority Date Filing Date
GB09304/69A Expired GB1272413A (en) 1969-04-15 1969-04-15 Lamp

Country Status (2)

Country Link
US (1) US3634715A (en)
GB (1) GB1272413A (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2748303A (en) * 1949-11-10 1956-05-29 Westinghouse Electric Corp Color-corrected light source and phosphors therefor
US2785327A (en) * 1954-02-17 1957-03-12 Gen Electric Electric discharge lamp with phosphorcoated rhodium reflector
US3025423A (en) * 1959-05-04 1962-03-13 Westinghouse Electric Corp Lamp, phosphor and method
DE1273385B (en) * 1966-10-19 1968-07-18 Ceag Concordia Elek Zitaets Ag Signal light which emits light signals or continuous light in different colors in different directions
US3480819A (en) * 1967-11-22 1969-11-25 Sylvania Electric Prod Phosphor coated high pressure electric discharge device

Also Published As

Publication number Publication date
US3634715A (en) 1972-01-11

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee