US3662203A - High pressure saturated metal vapor, preferably sodium or metal halide vapor discharge lamp - Google Patents

High pressure saturated metal vapor, preferably sodium or metal halide vapor discharge lamp Download PDF

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Publication number
US3662203A
US3662203A US36318A US3662203DA US3662203A US 3662203 A US3662203 A US 3662203A US 36318 A US36318 A US 36318A US 3662203D A US3662203D A US 3662203DA US 3662203 A US3662203 A US 3662203A
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United States
Prior art keywords
lamp
outer envelope
discharge vessel
diameter
vapor
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 - Lifetime
Application number
US36318A
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English (en)
Inventor
Bernhard Kuhl
Alexander Dobrusskin
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.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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
Priority claimed from DE19696920340 external-priority patent/DE6920340U/de
Priority claimed from DE19691957978 external-priority patent/DE1957978C3/de
Application filed by Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Application granted granted Critical
Publication of US3662203A publication Critical patent/US3662203A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/42—Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp
    • H01K1/46—Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp supported by a separate part, e.g. base, cap
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/48—Means forming part of the tube or lamp for the purpose of supporting it
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/50—Means forming part of the tube or lamps for the purpose of providing electrical connection to it
    • 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
    • H01J61/34—Double-wall vessels or containers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/28—Envelopes; Vessels
    • H01K1/34—Double wall vessels
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Definitions

  • FIGA A first figure.
  • the invention relates to a high pressure discharge lamp using an essentially saturated metal, or metal halide vapor, preferably a sodium vapor or a metal halide vapor discharge lamp with its discharge vessel, the so-called arc tube, hermetically sealed in an outer envelope.
  • the arc tube is enclosed in a single-ended ellipsoidal (see German Pat. No.
  • the volume of the outer envelope is a multiple of the volume of the discharge vessel, and the ratio of diameter of outer envelope to diameter of arc tube is relatively large, for instance, in a metal halide vapor discharge lamp with a wattage input of 400 W, larger than six.
  • the relative sizes of the envelope and are tube are changed so that the ratio of inner diameter of the outer envelope to outer diameter of the arc tube is substantially less, that is from 3:1 to I .05zl.
  • the outer envelope is of thermally highly loadable material capable of withstanding a temperature exceeding 500 C, such as quartz glass. It encloses the discharge vessel comparatively closely without however coming in contact with the latter.
  • the discharge vessel likewise, is of thermally highly loadable material.
  • the temperature of the outer envelope is increased in operation; in consequence of heat radiation from the outer envelope, additional heating of the arc tube is effected and thus the vapor pressure increase in the discharge.
  • the outer envelope has to be made from a material which can be highly stressed thermally.
  • a cylindrical tube of quartz glass is suitable. Photometrically, an envelope of sapphire would be even better. Costs make such material uneconomical; increasing the temperature of the arc tube beyond certain ranges does not proportionately increase light output.
  • the outer envelope is preferably made in double-ended form.
  • the outer envelope is closed at each end by a pinch seal preferably of l-type cross-section, enveloping the lead-in wires.
  • the bases of insulating material for example, of a ceramic material, are so shaped that one of its ends is provided with a slotted cylindrical portion.
  • the legs of the base resulting therefrom are closely embracing the flat midsection of the pinch-seal.
  • the lead-in wire is guided to the exterior by way of a contact pin passed through the base.
  • Both bases of the outer envelope may be located in the direction of the lamp axis; or in order to obtain a reduction in lamp length, at least one of the bases of the outer envelope can be mounted at right angle to the lamp axis, an arrangement which is advantageous primarily in lamps of high wattage input, for example, 5 kW.
  • the inner wall surface of the outer envelope may be provided with an infrared (IR) radiation reflective coating of, for example, tin oxide; IR-radiation absorbing additives in the material of the outer envelope proved likewise suitable. Similar measures are also applicable for absorption of shortwave UV radiation and thus for suppression of objectionable formation of ozone, for example, coating with, or addition of TiO,.
  • IR radiation reflective coating of, for example, tin oxide
  • Similar measures are also applicable for absorption of shortwave UV radiation and thus for suppression of objectionable formation of ozone, for example, coating with, or addition of TiO,.
  • FIG. 1 is a schematic cross-sectional view of the structure of a 400 W metal halide vapor discharge lamp
  • FIG. 2a is a graph showing the luminous efficiency (ordinate) of a 400 W discharge lamp containing dysprosium iodide plotted against temperature (C) and vapor pressure
  • FIG. 2b shows a section of the color triangle wherein the chromaticity coordinates of the light are shown for a lamp either with quartz or glass envelope;
  • H6. 3 is a schematic elevation of the structure of a 400 W high pressure sodium vapor discharge lamp
  • FIG. 4 is a schematic view of a lamp having one base extending at right angle
  • FIG. 5 is a fragmentary cross-sectional view of a lamp base.
  • the discharge vessel 1 of quartz glass is sealed at its opposite ends by a pinch seal 2, 3 each, through which the lead-in wires 4, 5 are passed in vacuum-tight manner.
  • the filling of the lamp comprises, for example, 20 mg of Hg, 2.5 mg of Dy, 10 mg of Hgh, 5.5 mg of TH and Ar at 30 torr in a volume of 16 cc.
  • the end portions of the discharge vessel 1 are provided with a radiant-heat reflecting coating 6 of 21 02.
  • the ends of the lead-in wires 4, 5 extending outside the discharge vessel 1 are electrically connected with a disk 7 of metal, for example, of nickel or molybdenum.
  • the disk 7 has at its periphery a plurality of supports 8 which are used as resilient mounting support of the discharge vessel 1 in the enclosing outer envelope 9 of quartz glass.
  • the inner surface may be coated as schematically shown at 9', with an IR, or UV (or both) reflective coating.
  • One conductor 10 or ll, respectively, is connected to the lead-in wires 4, 5 via disk 7, said conductors extending hermetically sealed, through the ends of the outer envelope by means of flat pinch seals 12 or 13.
  • the ceramic bases l4, 15 are affixed to the pinch seals l2, l3.
  • l6 denotes the getter material provided within the outer envelope.
  • the outer envelope 9 may either be exhausted or filled with nitrogen or argon of about 700 torr cold pressure. Suitable dimensions for a 400 W lamp:
  • the inner diameter of outer envelope 9 is 27 mm;
  • the outer diameter of discharge vessel 1 is 22.5 mm
  • the lamp If the lamp is operated in horizontal position with a wattage input of 400 W and an operating voltage of about l05 V, it has a luminous efficiency of about 70 lm/W. If operated in vertical position, the luminous efficiency is approx. lm/W.
  • outer envelope 9 has an inner diameter of 50 mm
  • the luminous efficiency of such a lamp is lm/W in horizontal operating position.
  • the curve shown in FIG. 20 applies to 400 W lamps with a constant arc tube wall load of 10 W/cm.
  • Point A indicates the luminous efl'lciency 1 for a lamp with an ellipsoidal outer envelope of glass
  • point B for a lamp with an outer envelope of quartz according to the invention.
  • Glass may still be used (for thermal reasons) as the material for the outer envelope
  • quartz should be used.
  • limit line Q higher thermally loadable materials should be used which may, however, due to their cost, be uneconomical commercially. in the section of the color triangle shown in FIG.
  • FIG. 3 the discharge vessel 17 of the high pressure sodium vapor discharge lamp is of light-transmissive alumina ceramic; its ends 18 and 19 are hermetically sealed in known manner.
  • the filling comprises sodium, mercury and a basic gas, for example, xenon or argon.
  • the mounting support of the discharge vessel and the feed through of the lead-in wires are similar to the embodiment of FIG. 1 and have been given the same reference numbers.
  • the inner diameter of the outer envelope 9 is 20 mm
  • the outer diameter of the discharge vessel 17 is 9 mm, so that the two vessels are spaced a distance of 5.5 mm.
  • the complete lamp has an overall length of about 20 cm.
  • the wattage input of the lamp is 400 W, the luminous efficiency about 100 lm/W.
  • the double-ended structure permits ignition of the lamp even under hot operating conditions by means of ignition devices with high starting pulses (30 kV) which is impossible in case of single-ended lamps due to the possibility of spurious arc-over caused by the small spacings at the base, lamp socket and fixture.
  • FIG. 4 shows a kW lamp with conventional cylindrical seals having an outer envelope 9, and in-line base 20 and a base 2l at the other end of the lamp extending at right angle with respect to the center line or axis C of the lamp.
  • both bases 20, 21 can be of the angle type.
  • H6. 5 is a cross-sectional view taken along lines VV of FIG. 3 of a base and the lamp foot.
  • the press 12 of the lamp is an I cross-section, with a foil type electrode lead embedded and sealed therein.
  • Two legs 22, 23 of a slotted base portion 14 embrace the l-shaped press.
  • High pressure metal vapor discharge lamp with saturated vapor in operating condition of the lamp comprising:
  • a discharge vessel (1) of thermally highly loadable material permitting an operating temperature exceeding 500 C confining an arc-type discharge and forming an arc enclosing tube, and having a wall load exceeding 10 W/cm;
  • the spacing between the inner diameter of the outer envelope (9) and the outer diameter of the discharge vessel 1) being defined by a ratio of from 3:1 to 1.05:] to provide radiation of heat from the discharge within the discharge vessel (1) to the outer envelope (9) and radiation back of such heat towards the discharge vessel (1) to additionally heat said vessel to the extent that vapor density is additionally increased apart from the increase in vapor pressure.
  • pinch seal is provided at each end of the outer envelope, said pinch seal being of l-shape in cross-section.
  • Lamp as claimed in claim 3 including a substantially cylindrical base of insulating material with slotted end portion constituting two opposed legs (22, 23) which closely embrace the flat mid-section of the pinch seal.
  • Lamp as claimed in claim 1 wherein the two bases of the outer envelope are extending in the direction of the lamp axis.
  • Lamp as claimed in claim I wherein at least one of the bases of the outer envelope is mounted at right angle to the lamp axis.
  • Lamp as claimed in claim 1 wherein the material of the outer envelope comprises [R-absorbing additives.
  • Lamp as claimed in claim I for 5 kW input wherein the discharge vessel has an outer diameter of about 3% cm and the outer envelope has an inner diameter of about 5 cm.
  • Lamp as claimed in claim 1 wherein the discharge vessel contains halides of metal.
  • Lamp as claimed in claim 14 for 400 W input wherein the discharge vessel has an outer diameter of up to about I cm and the outer envelope an inner diameter of about 2 cm.
  • Lamp as claimed in claim 1 wherein the material of the discharge vessel (1) is quartz glass.
  • Lamp as claimed in claim 1 wherein the material of the discharge vessel is lighttransmissive alumina ceramic.

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  • Vessels And Coating Films For Discharge Lamps (AREA)
US36318A 1969-05-20 1970-05-11 High pressure saturated metal vapor, preferably sodium or metal halide vapor discharge lamp Expired - Lifetime US3662203A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19696920340 DE6920340U (de) 1969-05-20 1969-05-20 Hochdruckentladungslampe.
DE19691957978 DE1957978C3 (de) 1969-11-18 1969-11-18 Natriumdampfhochdruck- oder Halogeiunetalldampfentladungslampe

Publications (1)

Publication Number Publication Date
US3662203A true US3662203A (en) 1972-05-09

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US36318A Expired - Lifetime US3662203A (en) 1969-05-20 1970-05-11 High pressure saturated metal vapor, preferably sodium or metal halide vapor discharge lamp

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US (1) US3662203A (en:Method)
BE (1) BE750668A (en:Method)
FR (1) FR2043549A1 (en:Method)
GB (1) GB1305065A (en:Method)
SE (1) SE374454B (en:Method)

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3780328A (en) * 1971-12-30 1973-12-18 Electronic Control & Surveilla Lighting unit for use underwater and in wet environment
US3842307A (en) * 1971-02-11 1974-10-15 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh High pressure mercury vapor discharge lamp with metal halide additives
US3889142A (en) * 1974-03-25 1975-06-10 Gte Sylvania Inc Metal halide discharge lamp having heat reflective coating
US3896326A (en) * 1973-07-19 1975-07-22 Gte Sylvania Inc Metal halide discharge lamp having expanded section arc tube
US3959524A (en) * 1974-03-25 1976-05-25 Gte Sylvania Incorporated Metal halide discharge lamp having heat reflective coating
EP0062381A1 (en) * 1981-04-08 1982-10-13 Koninklijke Philips Electronics N.V. High-pressure discharge lamp
FR2513809A1 (fr) * 1981-09-28 1983-04-01 Gen Electric Lampe a decharge a haute intensite
US4467238A (en) * 1981-09-03 1984-08-21 General Electric Company High-pressure sodium lamp with improved IR reflector
US4481446A (en) * 1979-04-26 1984-11-06 Mitsubishi Denki Kabushiki Kaisha Metal vapor discharge lamp
US4737677A (en) * 1984-11-30 1988-04-12 Gte Products Corporation Linear sodium lamp arc tube centering means
DE3735523A1 (de) * 1986-10-20 1988-04-28 Tungsram Reszvenytarsasag Alkali-halogenid als zusatz enthaltende metallhalogen-entladungslampe
US4837477A (en) * 1987-02-20 1989-06-06 Patent Treuhand Gesellschaft Fur Elektrische Gluhlampen Mbh High pressure discharge lamp with improved arc tube retention structure
EP0321866A3 (en) * 1987-12-22 1990-12-27 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh High-pressure discharge lamp
EP0321867A3 (de) * 1987-12-22 1991-01-02 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Hochdruckentladungslampe
US5111104A (en) * 1989-12-11 1992-05-05 Gte Products Corporation Triple-enveloped metal-halide arc discharge lamp having lower color temperature
US5272407A (en) * 1991-12-18 1993-12-21 North American Philips Corporation Electric lamp having screens for reducing photo electron emission
WO1995019639A1 (en) * 1994-01-18 1995-07-20 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Metal halide lamp
US5587626A (en) * 1993-12-10 1996-12-24 General Electric Company Patterned optical interference coatings for only a portion of a high intensity lamp envelope
DE29817633U1 (de) * 1998-10-02 2000-02-17 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 81543 München Einseitig gesockelte elektrische Lampe
US6498429B1 (en) * 1999-11-15 2002-12-24 General Electric Company Sodium-xenon lamp with improved characteristics at end-of-life
US20030062822A1 (en) * 2001-09-29 2003-04-03 Chow Shing Cheung Cold cathode fluorescent lamp with a double-tube construction
US6639341B1 (en) * 1999-03-26 2003-10-28 Matsushita Electric Works, Ltd. Metal halide discharge lamp
US20030209986A1 (en) * 1997-06-06 2003-11-13 Harison Toshiba Lighting Corporation Metal halide discharge lamp, lighting device for metal halide discharge lamp, and illuminating apparatus using metal halide discharge lamp
WO2006003601A1 (en) * 2004-06-29 2006-01-12 Koninklijke Philips Electronics N.V. Electric lamp and method for mounting a lamp vessel in an outer bulb
US20060255741A1 (en) * 1997-06-06 2006-11-16 Harison Toshiba Lighting Corporation Lightening device for metal halide discharge lamp
US20060273728A1 (en) * 2003-09-11 2006-12-07 Koninklijke Philips Electrnics N.V. High-pressure gas discharge lamp
US20080048541A1 (en) * 2004-12-20 2008-02-28 Sumrall Ernest N Polymer-thermal shield for ultra-violet lamp
US20080170384A1 (en) * 2007-01-11 2008-07-17 Zhu Jing Jim Lamp
US20090289551A1 (en) * 2006-07-07 2009-11-26 Koninklijke Philips Electronics N.V. Gas-discharge lamp
US20120262792A1 (en) * 2011-04-15 2012-10-18 Applied Botanics, Inc. Dba Method Seven Optical glass filter for producing balanced white light from a high pressure sodium lamp source
WO2015168559A1 (en) * 2014-05-02 2015-11-05 Surna, Inc. Modular stepped reflector
US10113343B2 (en) 2014-05-02 2018-10-30 Surna Inc. Thermally isolated high intensity light source
US10211042B2 (en) * 2016-12-04 2019-02-19 Allstate Garden Supply Double-ended high intensity discharge lamp and manufacturing method thereof

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5075588A (en) * 1990-12-06 1991-12-24 Gte Products Corporation Arc discharge lamp with spring-mounted arc tube and shroud
DE10325552A1 (de) * 2003-06-05 2004-12-23 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Elektrische Lampe mit Außenkolben und zugehöriger Trägerkörper

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US21823A (en) * 1858-10-19 Rtjfus dawes
US1961719A (en) * 1932-11-15 1934-06-05 Gen Electric Gaseous electric discharge device
US2001528A (en) * 1931-09-18 1935-05-14 Gen Electric Gaseous electric discharge device
US2166951A (en) * 1929-07-01 1939-07-25 Ulrich W Doering Discharge device
US3259777A (en) * 1961-05-09 1966-07-05 Gen Electric Metal halide vapor discharge lamp with near molten tip electrodes
US3379916A (en) * 1964-11-25 1968-04-23 Pat & Visseaux Claude High-pressure vapour lamp containing indium, thallium and gallium halides
US3400288A (en) * 1965-11-13 1968-09-03 Philips Corp Sodium vapor discharge lamp with infrared reflecting coating

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US21823A (en) * 1858-10-19 Rtjfus dawes
US2166951A (en) * 1929-07-01 1939-07-25 Ulrich W Doering Discharge device
US2001528A (en) * 1931-09-18 1935-05-14 Gen Electric Gaseous electric discharge device
US1961719A (en) * 1932-11-15 1934-06-05 Gen Electric Gaseous electric discharge device
US3259777A (en) * 1961-05-09 1966-07-05 Gen Electric Metal halide vapor discharge lamp with near molten tip electrodes
US3379916A (en) * 1964-11-25 1968-04-23 Pat & Visseaux Claude High-pressure vapour lamp containing indium, thallium and gallium halides
US3400288A (en) * 1965-11-13 1968-09-03 Philips Corp Sodium vapor discharge lamp with infrared reflecting coating

Cited By (45)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3842307A (en) * 1971-02-11 1974-10-15 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh High pressure mercury vapor discharge lamp with metal halide additives
US3780328A (en) * 1971-12-30 1973-12-18 Electronic Control & Surveilla Lighting unit for use underwater and in wet environment
US3896326A (en) * 1973-07-19 1975-07-22 Gte Sylvania Inc Metal halide discharge lamp having expanded section arc tube
US3889142A (en) * 1974-03-25 1975-06-10 Gte Sylvania Inc Metal halide discharge lamp having heat reflective coating
US3959524A (en) * 1974-03-25 1976-05-25 Gte Sylvania Incorporated Metal halide discharge lamp having heat reflective coating
US4481446A (en) * 1979-04-26 1984-11-06 Mitsubishi Denki Kabushiki Kaisha Metal vapor discharge lamp
EP0062381A1 (en) * 1981-04-08 1982-10-13 Koninklijke Philips Electronics N.V. High-pressure discharge lamp
US4479071A (en) * 1981-04-08 1984-10-23 U.S. Philips Corporation High-pressure discharge lamp having shielding means comprised of boron nitride
US4467238A (en) * 1981-09-03 1984-08-21 General Electric Company High-pressure sodium lamp with improved IR reflector
US4446397A (en) * 1981-09-28 1984-05-01 General Electric Company High intensity discharge lamp with infrared reflecting means for improving efficacy
FR2513809A1 (fr) * 1981-09-28 1983-04-01 Gen Electric Lampe a decharge a haute intensite
US4737677A (en) * 1984-11-30 1988-04-12 Gte Products Corporation Linear sodium lamp arc tube centering means
DE3735523A1 (de) * 1986-10-20 1988-04-28 Tungsram Reszvenytarsasag Alkali-halogenid als zusatz enthaltende metallhalogen-entladungslampe
US4837477A (en) * 1987-02-20 1989-06-06 Patent Treuhand Gesellschaft Fur Elektrische Gluhlampen Mbh High pressure discharge lamp with improved arc tube retention structure
EP0279249A3 (en) * 1987-02-20 1990-08-29 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh High-pressure discharge lamp
EP0321866A3 (en) * 1987-12-22 1990-12-27 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh High-pressure discharge lamp
EP0321867A3 (de) * 1987-12-22 1991-01-02 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Hochdruckentladungslampe
US5111104A (en) * 1989-12-11 1992-05-05 Gte Products Corporation Triple-enveloped metal-halide arc discharge lamp having lower color temperature
US5272407A (en) * 1991-12-18 1993-12-21 North American Philips Corporation Electric lamp having screens for reducing photo electron emission
US5676579A (en) * 1993-12-10 1997-10-14 General Electric Company Patterned optical interference coatings for electric lamps
US5587626A (en) * 1993-12-10 1996-12-24 General Electric Company Patterned optical interference coatings for only a portion of a high intensity lamp envelope
US5854535A (en) * 1994-01-18 1998-12-29 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh Metal halide discharge lamp with a quartz discharge vessel and an outer UV radiation absorbent envelope
WO1995019639A1 (en) * 1994-01-18 1995-07-20 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Metal halide lamp
US20050179391A1 (en) * 1997-06-06 2005-08-18 Harison Toshiba Lighting Corporation Lightening device for metal halide discharge lamp
US20060255741A1 (en) * 1997-06-06 2006-11-16 Harison Toshiba Lighting Corporation Lightening device for metal halide discharge lamp
US20030209986A1 (en) * 1997-06-06 2003-11-13 Harison Toshiba Lighting Corporation Metal halide discharge lamp, lighting device for metal halide discharge lamp, and illuminating apparatus using metal halide discharge lamp
US7057349B2 (en) 1997-06-06 2006-06-06 Harison Toshiba Lighting Corporation Lightening device for metal halide discharge lamp
US6873109B2 (en) * 1997-06-06 2005-03-29 Harison Toshiba Lighting Corporation Metal halide discharge lamp, lighting device for metal halide discharge lamp, and illuminating apparatus using metal halide discharge lamp
DE29817633U1 (de) * 1998-10-02 2000-02-17 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 81543 München Einseitig gesockelte elektrische Lampe
US6639341B1 (en) * 1999-03-26 2003-10-28 Matsushita Electric Works, Ltd. Metal halide discharge lamp
US6498429B1 (en) * 1999-11-15 2002-12-24 General Electric Company Sodium-xenon lamp with improved characteristics at end-of-life
US20030062822A1 (en) * 2001-09-29 2003-04-03 Chow Shing Cheung Cold cathode fluorescent lamp with a double-tube construction
EP1298704A3 (en) * 2001-09-29 2005-06-29 Chow, Shing Cheung Cold cathode fluorescent lamp with a double-tube construction
US6815883B2 (en) * 2001-09-29 2004-11-09 Shing Cheung Chow Cold cathode fluorescent lamp with a double-tube construction
US20060273728A1 (en) * 2003-09-11 2006-12-07 Koninklijke Philips Electrnics N.V. High-pressure gas discharge lamp
WO2006003601A1 (en) * 2004-06-29 2006-01-12 Koninklijke Philips Electronics N.V. Electric lamp and method for mounting a lamp vessel in an outer bulb
US20080278050A1 (en) * 2004-06-29 2008-11-13 Koninklijke Philips Electronics, N.V. Electric Lamp and Method For Mounting a Lamp Vessel in an Outer Bulb
US20080048541A1 (en) * 2004-12-20 2008-02-28 Sumrall Ernest N Polymer-thermal shield for ultra-violet lamp
US20090289551A1 (en) * 2006-07-07 2009-11-26 Koninklijke Philips Electronics N.V. Gas-discharge lamp
US7884549B2 (en) * 2006-07-07 2011-02-08 Koninklijke Philips Electronics N.V. Gas-discharge lamp
US20080170384A1 (en) * 2007-01-11 2008-07-17 Zhu Jing Jim Lamp
US20120262792A1 (en) * 2011-04-15 2012-10-18 Applied Botanics, Inc. Dba Method Seven Optical glass filter for producing balanced white light from a high pressure sodium lamp source
WO2015168559A1 (en) * 2014-05-02 2015-11-05 Surna, Inc. Modular stepped reflector
US10113343B2 (en) 2014-05-02 2018-10-30 Surna Inc. Thermally isolated high intensity light source
US10211042B2 (en) * 2016-12-04 2019-02-19 Allstate Garden Supply Double-ended high intensity discharge lamp and manufacturing method thereof

Also Published As

Publication number Publication date
GB1305065A (en:Method) 1973-01-31
SE374454B (en:Method) 1975-03-03
FR2043549A1 (en:Method) 1971-02-19
BE750668A (fr) 1970-11-03

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