GB523235A - Improvements in combinations of high-pressure metal-vapour electric discharge lamps with luminescent materials - Google Patents

Improvements in combinations of high-pressure metal-vapour electric discharge lamps with luminescent materials

Info

Publication number
GB523235A
GB523235A GB3773638A GB3773638A GB523235A GB 523235 A GB523235 A GB 523235A GB 3773638 A GB3773638 A GB 3773638A GB 3773638 A GB3773638 A GB 3773638A GB 523235 A GB523235 A GB 523235A
Authority
GB
United Kingdom
Prior art keywords
zinc
discharge
discharge lamps
pressure metal
combinations
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
GB3773638A
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB3773638A priority Critical patent/GB523235A/en
Publication of GB523235A publication Critical patent/GB523235A/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

Landscapes

  • Discharge Lamp (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

523,235. Discharge lamps. GENERAL ELECTRIC CO., Ltd., and FRANCIS, V. J. Dec. 29, 1938, No. 37736. [Class 39 (i)] In a high pressure metal vapour discharge lamp having a quartz envelope with luminescent material outside the envelope the filling comprises (1) mercury nearly all evaporated in full operation and then having a vapour pressure exceeding three atmospheres and (ii) zinc which is not all evaporated in full operation ; a rare gas is also present. Dimensions and consumption of a lamp are given wherein the discharge is 30 mm. long ; the ends of the discharge tube are coated with platinum paint and the tube is enclosed in an outer envelope coated internally with zinccadmium sulphide activated with copper to give orange coloured fluorescence. Specification 431,409 which describes the use of cadmium and zinc with mercury as a filling is referred to. The effects of the cadmium and zinc are described.
GB3773638A 1938-12-29 1938-12-29 Improvements in combinations of high-pressure metal-vapour electric discharge lamps with luminescent materials Expired GB523235A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3773638A GB523235A (en) 1938-12-29 1938-12-29 Improvements in combinations of high-pressure metal-vapour electric discharge lamps with luminescent materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3773638A GB523235A (en) 1938-12-29 1938-12-29 Improvements in combinations of high-pressure metal-vapour electric discharge lamps with luminescent materials

Publications (1)

Publication Number Publication Date
GB523235A true GB523235A (en) 1940-07-09

Family

ID=10398668

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3773638A Expired GB523235A (en) 1938-12-29 1938-12-29 Improvements in combinations of high-pressure metal-vapour electric discharge lamps with luminescent materials

Country Status (1)

Country Link
GB (1) GB523235A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4439711A (en) * 1978-12-28 1984-03-27 Mitsubishi Denki Kabushiki Kaisha Metal vapor discharge lamp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4439711A (en) * 1978-12-28 1984-03-27 Mitsubishi Denki Kabushiki Kaisha Metal vapor discharge lamp

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