GB852783A - Improvements in or relating to high pressure mercury vapour electric discharge lamps - Google Patents

Improvements in or relating to high pressure mercury vapour electric discharge lamps

Info

Publication number
GB852783A
GB852783A GB17703/58A GB1770358A GB852783A GB 852783 A GB852783 A GB 852783A GB 17703/58 A GB17703/58 A GB 17703/58A GB 1770358 A GB1770358 A GB 1770358A GB 852783 A GB852783 A GB 852783A
Authority
GB
United Kingdom
Prior art keywords
lamp
discharge
phosphor
magnesium
envelope
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
GB17703/58A
Inventor
Ronald Albert Evans
Evan Herbert Nelson
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 GB17703/58A priority Critical patent/GB852783A/en
Priority to FR799445A priority patent/FR1229385A/en
Publication of GB852783A publication Critical patent/GB852783A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00Gas-discharge or vapour-discharge lamps
    • H01J61/02Details
    • H01J61/38Devices for influencing the colour or wavelength of the light
    • H01J61/42Devices for influencing the colour or wavelength of the light by transforming the wavelength of the light by luminescence
    • H01J61/44Devices characterised by the luminescent material
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/77Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7715Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing cerium
    • C09K11/77212Silicates
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/66Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing germanium, tin or lead
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00Gas-discharge or vapour-discharge lamps
    • H01J61/82Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
    • H01J61/822High-pressure mercury lamps

Abstract

852,783. Fluorescent discharge lamps. GENERAL ELECTRIC CO. Ltd. June 24, 1959 [June 3, 1958], No. 17703/58. Drawings to Specification. Class 39(1). A high pressure mercury vapour electric discharge lamp of the kind having a quartz discharge envelope mounted within a glass outer jacket, wherein W/1, where W is the wattage and 1 the arc length, lies between 40 and 100 W. per cm., and the discharge envelope is of such shape that the external wall temperature lies everywhere between 580‹C. and 650‹C.; and the metal filling inside the lamp includes a quantity of zinc in such proportion that when the lamp is operating at W watts from an alternating supply the voltage drop per cm. of arc length is between 10 and 35, and the number of burners emitted at wavelengths between 4600Š and 5100Š is not less than 2% of the total light output of the lamp ; and the discharge envelope is surrounded by a screen coated with a red fluorescing phosphor of such thickness that the number of lumens emitted at wavelengths between 6100Š and 7200Š is not less than 5% of the total lumen output of the lamp ; the proportion of zinc filling, e.g. the lamp contains 80 mgm. of mercury and 40 mgm. of zinc and the thickness of the phosphor layer being, however, so small that the initial luminous efficiency of the lamp is not less than 40 lumens per watt. The outer glass jacket may be ovoidal and the inner quartz envelope 94 mms. long, containing directly heated electrodes formed from a tungsten rod containing a slot in its side, the slot contains an electron-emissive pellet which is held in place by a tungsten helix the electrodes are spaced 800 mms. apart and an auxiliary electrode is set in the wall near one end of the tube. The innermost parts of the seals of the tube are coated with platinum to reduce ' cold-spot ' effects and the tube is filling with argon at 20 mm. to act as a starting gas and the space between the envelopes is evacuated. The wall temperature is measured by means of a thermo-couple. The red phosphor may consist of magnesium fluor-germinate or magnesium arsenate activated by 0À15% of manganese or of [1À2 BaO, 1À2 SrO, 0À6 Li 2 O, 1À9 SiO 2 ] activated with 10% cerium and 1À2% manganese, which is coated on a quartz sleeve snugly fitted round the discharge envelope. The Provisional Specification states that the phosphor may also comprise a combination of magnesium arsenate and magnesium fluoro-germinate, activated by manganese.
GB17703/58A 1958-06-03 1958-06-03 Improvements in or relating to high pressure mercury vapour electric discharge lamps Expired GB852783A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB17703/58A GB852783A (en) 1958-06-03 1958-06-03 Improvements in or relating to high pressure mercury vapour electric discharge lamps
FR799445A FR1229385A (en) 1958-06-03 1959-07-06 High pressure mercury vapor electric discharge tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB17703/58A GB852783A (en) 1958-06-03 1958-06-03 Improvements in or relating to high pressure mercury vapour electric discharge lamps

Publications (1)

Publication Number Publication Date
GB852783A true GB852783A (en) 1960-11-02

Family

ID=10099730

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17703/58A Expired GB852783A (en) 1958-06-03 1958-06-03 Improvements in or relating to high pressure mercury vapour electric discharge lamps

Country Status (1)

Country Link
GB (1) GB852783A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1228717B (en) * 1962-05-02 1966-11-17 Philips Nv High pressure discharge lamp
US4439711A (en) * 1978-12-28 1984-03-27 Mitsubishi Denki Kabushiki Kaisha Metal vapor discharge lamp
US4499396A (en) * 1982-08-18 1985-02-12 Gte Products Corporation Metal halide arc discharge lamp with means for suppressing convection currents within the outer envelope and methods of operating same
US4580989A (en) * 1982-08-18 1986-04-08 Gte Products Corporation Metal halide arc discharge lamp with means for suppressing convection currents within the outer envelope and methods of operating and constructing same
US4620125A (en) * 1984-10-29 1986-10-28 Gte Products Corporation Low wattage metal halide lamp with inverted domed sleeve
US4625141A (en) * 1984-10-29 1986-11-25 Gte Products Corporation Low wattage metal halide discharge lamp electrically biased to reduce sodium loss
US4839565A (en) * 1987-04-03 1989-06-13 General Electric Company High pressure double wall sodium arc tube and methods of operating such
US4890030A (en) * 1984-06-18 1989-12-26 Gte Products Corporation Metal halide discharge lamp with arc tube temperature equalizing means

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1228717B (en) * 1962-05-02 1966-11-17 Philips Nv High pressure discharge lamp
US4439711A (en) * 1978-12-28 1984-03-27 Mitsubishi Denki Kabushiki Kaisha Metal vapor discharge lamp
US4499396A (en) * 1982-08-18 1985-02-12 Gte Products Corporation Metal halide arc discharge lamp with means for suppressing convection currents within the outer envelope and methods of operating same
US4580989A (en) * 1982-08-18 1986-04-08 Gte Products Corporation Metal halide arc discharge lamp with means for suppressing convection currents within the outer envelope and methods of operating and constructing same
US4890030A (en) * 1984-06-18 1989-12-26 Gte Products Corporation Metal halide discharge lamp with arc tube temperature equalizing means
US4620125A (en) * 1984-10-29 1986-10-28 Gte Products Corporation Low wattage metal halide lamp with inverted domed sleeve
US4625141A (en) * 1984-10-29 1986-11-25 Gte Products Corporation Low wattage metal halide discharge lamp electrically biased to reduce sodium loss
US4839565A (en) * 1987-04-03 1989-06-13 General Electric Company High pressure double wall sodium arc tube and methods of operating such

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