EP0306269A2 - Doppelkolbige elektrische Lampe - Google Patents

Doppelkolbige elektrische Lampe Download PDF

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Publication number
EP0306269A2
EP0306269A2 EP88308020A EP88308020A EP0306269A2 EP 0306269 A2 EP0306269 A2 EP 0306269A2 EP 88308020 A EP88308020 A EP 88308020A EP 88308020 A EP88308020 A EP 88308020A EP 0306269 A2 EP0306269 A2 EP 0306269A2
Authority
EP
European Patent Office
Prior art keywords
lamp
shield
light
outer envelope
source capsule
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.)
Granted
Application number
EP88308020A
Other languages
English (en)
French (fr)
Other versions
EP0306269B1 (de
EP0306269A3 (de
Inventor
William M Keeffe
Robert J Karlotski
Joseph S Kulik
Simone P Bazin
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 Sylvania Inc
Original Assignee
GTE Products Corp
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 GTE Products Corp filed Critical GTE Products Corp
Publication of EP0306269A2 publication Critical patent/EP0306269A2/de
Publication of EP0306269A3 publication Critical patent/EP0306269A3/de
Application granted granted Critical
Publication of EP0306269B1 publication Critical patent/EP0306269B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/04—Electrodes; Screens; Shields
    • H01J61/045—Thermic screens or reflectors
    • 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

Definitions

  • This invention relates to electric lamps and, more particularly, to double-enveloped lamps which may be safely operated without the need for enclosing the lamp within a protective fixture even in the event of a burst of the inner light-source capsule.
  • One way to avoid the safety hazard is to operate the lamp within a protective fixture itself capable of containing such a failure. This method is more acceptable in commercial usage than in the consumer market, but it has disadvantages in either case.
  • a protective fixture generally incurs additional cost, particularly if an existing fixture has to be modified or replaced.
  • a protective lens reduces the light output of the lamp somewhat. It may be more difficult and expensive to replace a lamp in a protective fixture, and replacement of a lamp with a shattered outer envelope is itself a safety concern. There may be other technical or aesthetic drawbacks.
  • a preferred solution to the containment failure problem is clearly a lamp capable of self containment.
  • One technique is to make the outer envelope stronger so that it will contain.
  • United States Patent No. 4,598,225 issued July 1, 1986, to Gagnon
  • an outer envelope having a thick outer wall in combination with a light-source capsule with a thin inner wall.
  • Another technique is that of shielding the outer envelope from the effects of a burst capsule.
  • United States Patent No. 4,580,989, issued April 8, 1986, to Fohl et al. a light-transmissive enclosure within the outer envelope surrounds the light-source capsule and shields the outer envelope. Also, see Bechard et al., United States Patent No.
  • Another object of the invention is to provide a double-enveloped lamp which may be safely operated without a protective fixture.
  • Yet another object of the invention is to provide a structure for a double-enveloped lamp in which the outer envelope will contain a burst of the inner light-source capsule even in lamps having wattages of one hundred and seventy-five watts and higher.
  • Still another object of the invention is to provide a self-containing double-enveloped lamp which has improved luminous efficacy, color-rendering ability, and life.
  • a further object of the invention is to provide certain optimum values for wall thicknesses and cross-sectional radius ratios for the construction of self-containing double-enveloped lamps with improved performance characteristics.
  • a double-enveloped electric lamp comprising a light-transmissive outer envelope enclosing an interior.
  • the outer envelope has a minimum wall thickness which is greater than one millimeter.
  • the lamp further comprises a light-source capsule mounted within the outer envelope.
  • the light-source capsule has an operating wattage.
  • the light-source capsule is subject to burst on rare occasions.
  • Means for shielding the outer envelope by absorbing and dissipating a portion of the energy of a burst of the light-source capsule are included in the lamp.
  • Such shielding means include a light-transmissive shield mounted within the outer envelope. The shield substantially surrounds the light-source capsule.
  • a lamp in accordance with the invention combines the shielding means and thick-walled outer envelope to achieve the self-containment feature.
  • the invention further combines reinforcing means for the shield, outer envelope, or both, in order to enhance the containment capability of a particular lamp structure.
  • a thin-walled capsule may be employed in combination with the shield and thick-walled outer envelope and, possibly, with reinforcing means for the shield, outer envelope, or both, for enhanced containment capability.
  • tempered glass may be use for the shield and/or outer envelope in accordance with the invention.
  • Lamps constructed in accordance with the invention will have the ability to contain a burst of the light-source capsule. Such lamps may be operated without the need for a protective fixture. These lamps will provide improved performance characteristics in comparison with their prior art counterparts.
  • the term "light-source capsule” denotes: an arc tube of an arc discharge lamp, a tungsten-halogen incandescent capsule, or any light-emitting capsule having an internal operating pressure differing from the operating pressure within the outer envelope.
  • a light-source capsule operates within an outer envelope, the possibility of a lamp containment failure exists.
  • the type of light-source capsule e.g., metal-halide arc tube or tungsten-halogen capsule
  • the type of light-source capsule is not critical to the pure containment function of the invention. From a strict containment viewpoint, only the presence of an inner capsule, capable of bursting and releasing a certain amount of energy, certain sized shards, and other capsule fragments, all with certain levels of heat, force, and/or momentum, is important. Accordingly, the invention describes and includes a generic capsule. Of course, in the description of any working example, the specific type and wattage of the light-source capsule should be identified in order to select related lamp parameters.
  • capsule and “containment” as used herein mean that the outer envelope of the lamp does not shatter as a result of a burst of the inner light-source capsule. When containment occurs, capsule shards and other internal lamp fragments remain within the lamp's outer envelope after a capsule burst.
  • efficacy and luminous efficacy as used herein are a measure of the total luminous flux emitted by a light source, expressed in lumens per watt.
  • higher-wattage as employed herein with reference to a lamp (or lamp component) denotes a lamp (or component of a lamp) having a rated wattage of one hundred and seventy-five watts or greater.
  • a “thick” or “thick-walled” outer envelope means that the minimum wall thickness of the central portion of the envelope is greater than one millimeter.
  • a “thin” or “thin-walled” light-source capsule means that the central portion or body of the capsule has a maximum wall thickness of less than one millimeter.
  • a "thick-walled" outer envelope is intended to apply both to the reflectorized portion of the outer envelope and to the lens portion of the outer envelope.
  • FIG. 1 shows double-enveloped lamp 10 comprising light-transmissive outer envelope 12 enclosing an interior.
  • envelope 12 is formed from hard glass which has been blow-molded.
  • the bulb portion of envelope 12 is shown substantially in cross-section so that relative wall thicknesses may be observed.
  • the bulb portion of envelope 12 has a minimum wall thickness z at indicator 14.
  • the wall thickness of envelope 12 is not uniform. This point is surprising.
  • the glass is blown into the bulbous shape shown in the figure. As the wall is stretched into the bulb shape, the wall thickness is reduced in proportion to the degree of stretching.
  • the wall thickness at indicator 16 is thinner than at indicator 18, and it is minimum at indicator 14 where envelope 12 has been stretched to the greatest degree.
  • the strength (or ability to contain) of any small area of envelope 12 is directly related to the wall thickness over that area. It appears that envelope 12 is weakest in the vicinity of indicator 14, i.e., in the middle region of the bulb portion of envelope 12. Laboratory observations of envelopes which have failed to contain corroborate this fact.
  • the minimum wall thickness of the envelope is a critical factor for containment, an Achilles' heel. Because the surface area of a higher-wattage envelope is relatively large, the weight of the envelope increases substantially with only a slight increase in envelope wall thickness. Accordingly, there is a practical upper bound for the minimum wall thickness of envelope 12, lest the lamp be too heavy for a feasible commercial product.
  • minimum wall thickness z is greater than one millimeter.
  • a preferred value for z is .040 inches (which is approximately 1.02 mm).
  • Light-source capsule 20 is mounted within outer envelope 12, such as by means of metal straps 22 and 24 which may be welded to metal frame 26.
  • Capsule 20 has an operating wattage, e.g., four-hundred watts. As explained above, capsule 20 may burst on rare occasions for unknown reasons.
  • capsule 20 is a double-ended metal-halide arc discharge tube formed from quartz glass.
  • Means for shielding envelope 12 from a burst of capsule 20 are mounted within envelope 20.
  • the shielding means functions by absorbing and dissipating energy of a burst of capsule 20 such that the residual energy and forces, if any, which pass through the shield and reach envelope 12 may be contained by the outer envelope.
  • the shielding means comprises light-transmissive right circular cylinder 28 which surrounds capsule 20 laterally.
  • shield 28 may be domed on one or both ends so that capsule 20 will be more fully enclosed.
  • shield 28 may be shattered by the burst although, as will be explained, shield 28 will nevertheless absorb and dissipate a substantial portion of the energy and force of the burst.
  • electrically conductive frame 26 is shown as a "floating" frame, meaning that the frame is electrically isolated from the lamp's circuit in order to reduce sodium migration out of capsule 20.
  • Lead-in wires 34 and 36 are electrically coupled with the stem leads of base 38, e.g., a mogul type screw base, and provide power to the electrodes of capsule 20.
  • the central portion or body of capsule 20 has a wall thickness x; shield 28 has wall thickness y.
  • shield 28 absorbs or dissipates some (or all) of the energy of the burst.
  • the extent of burst energy absorbed or dissipated by shield 28 is related to the ratio of y to x (and somewhat more weakly, to the ratio of the cross-sectional radii of the two components). For given radii, the percentage of burst energy absorbed or dissipated by shield 28 increases as y/x increases, i.e., as the mass of shield 28 increases with respect to the mass of the body of capsule 20.
  • Lamp 10 employs a combination of shield 28 and thick-walled envelope 12 for containment.
  • a major disadvantage of increasing the wall thickness of envelope 12 sufficient for containment without the shield is the increase in the weight of the envelope.
  • a major disadvantage of increasing the wall thickness of shield 28 sufficient for containment without a thick outer envelope is the substantial reduction of luminous efficacy of the lamp (as well as the impractical effect of requiring the frame to be strengthened substantially in order to support the heavier shield).
  • the wall thickness of a shield employed within a standard outer envelope must be greater than three millimeters for containment.
  • This shield wall thickness causes a loss of luminous efficacy of approximately five to ten percent compared with the same Metalarc lamp with a standard envelope and no shield.
  • an optimally positioned shield having a wall thickness of approximately 1.5 millimeters in accordance with the invention surprisingly improves the luminous efficacy and color-rendering ability of the lamp.
  • lamp 10 has central axis V-V.
  • capsule 20 has a heat-reflecting coating, e.g., zirconium oxide, on the capsule's lower end in order to attain near isothermal operation of the capsule.
  • Shield 28 assists in reflecting heat back to capsule 20.
  • FIG. 2 is an enlarged cross-sectional view of lamp 10 along line 2-2 of FIG. 1, with parts removed for clarity.
  • Line 2-2 passes through the center of capsule 20.
  • Capsule 20, shield 28, and outer envelope 12 are shown as concentric walls about axis V-V.
  • Radius a extends from axis V-V to the outer surface of capsule 20.
  • Radius b extends from axis V-V to the inner surface of shield 28.
  • Radius C extends from axis V-V to the inner surface of envelope 12. The corresponding diameters are twice the radius.
  • optimum radius ratio means that the best values of luminous efficacy and color uniformity are obtained when the ratio is within the prescribed range. With luminous efficacy, a maximum value is obtained within the optimum range. Regarding color uniformity, various measures of lamp color, such as the "chromaticity coordinates,” maintain the same or similar values within the optimum range: from one lamp to the next; over the life of the lamp; and/or when the lamp is operated in various orientations with respect to the direction of gravity.
  • the height of the cylindrical shield in this embodiment of the invention is sufficient to surround the press seals laterally at the ends of capsule 20 as well as the body of the capsule.
  • the entire capsule is laterally surrounded by the shield, there is the additional benefit that the operation of the capsule is more nearly isothermal.
  • operating temperatures over the body of capsule 20 would increase uniformly. The surprising result is that the cold-spot temperature is elevated to a greater extend than the hot-spot temperature so that the distribution of operating temperatures over the body of the capsule is more nearly isothermal.
  • FIG. 3 is a pictorial view of shield 28 of lamp 10 wherein the shield includes reinforcing means, such as wire mesh 50.
  • Mesh 50 may be mounted on shield 28 by means of metal straps 52 and 54, or it may be imbedded within the glass wall.
  • mesh 50 may be loosely knitted, as shown in the drawing, because of the knitted mesh's additional energy-absorbing capability over that of a rigid mesh.
  • Stainless steel wire with a high chromium content is a preferred material for the construction of the mesh and mounting strap or straps because of its superior high-temperature properties, relatively low coefficient of thermal expansion, good resistance to oxidation and corrosion, and high tensile strength.
  • An alternate material for the mesh may be glass or quartz thread, similarly woven or knitted, which has the advantage that its dielectric property will not encourage sodium migration from the capsule.
  • High-temperature polymer filaments are also suitable materials for the mesh.
  • the mesh be as light-transmissive as possible so that there will be a minimal effect on the luminous efficacy of the lamp.
  • the mesh size i.e., the number of stitches per inch, and wire diameter should be selected such that the mesh will contain shards with mass large enough to be likely to cause a rupture of the outer envelope in the event of a burst of the light-source capsule. There is no requirement, however, that the mesh restrain all shards.
  • the mesh like the shield, performs the function of absorbing and dissipating burst energy sufficiently to permit the outer envelope to contain.
  • Mesh size and wire diameter may be selected such that lamp efficacy is not unduly compromised.
  • FIG. 4 shows another example of a shield which may be employed in accordance with the invention.
  • shield 68 is domed with domed reinforcing wire mesh 60 mounted on the shield by means of metal strap 62.
  • This shield may be employed in combination with a single-ended light-source capsule, or with a double-ended capsule provided an opening is made in domed top 64 for the lead-in wire or support.
  • one or both lead-in wires may be insulated by means of a dielectric sleeve or coating. It may be desirable to prevent the wire mesh from contacting a single lead-in wire or any component of the electrical circuit so that sodium migration out of the light-source capsule will not be spurred by the presence of the mesh.
  • a rectifying device e.g., a diode, between the mesh and electrical circuit, may be included as an additional precaution.
  • FIG. 5 shows another example of a shield and reinforcing mesh combination wherein shield 28 is a right circular cylinder open at both ends and wire mesh 70 is domed at end 76 thereof.
  • FIG. 6 is an elevational view of another embodiment of a lamp in accordance with the invention.
  • Lamp 80 includes single-ended metal-halide arc tube 86 surrounded by domed shield 84 within thick-walled outer envelope 82. Because of the absence of any type of burst restraint, such as a press seal and lead-in wire, at top 88 of arc tube 86, shield 84 may be domed above top 88.
  • FIG. 7 is an elevational view of still another embodiment of a lamp in accordance with the invention.
  • Lamp 90 underscores the point that a wire mesh itself can be shielding means in accordance with the invention, because the mesh absorbs and dissipates burst energy which, by definition, is the function of the shield.
  • Lamp 90 includes single-ended tungsten-halogen light-source capsule 94 surrounded by wire-mesh shield 96 within thick-walled outer envelope 92.
  • Shield 96 may be anchored to the lamp stem by anchoring pins 98 and 100. As this embodiment illustrates, there is no requirement that the shield be a closed or continuous surface. So long as mesh 96 absorbs and dissipates burst energy sufficiently for envelope 92 to contain, the "mesh" is a "shield" in accordance with the invention.
  • FIGS. 8 and 9 illustrate other examples of wire-mesh shields surrounding single-ended and double-ended light-source capsules, either of which may be employed in combination with a thick-walled outer envelope in accordance with the invention.
  • Mounting straps 102, 106, and 108 are suggested in the drawings. However, these mounting straps may not be necessary.
  • Shields 96 and 98 may be mounted on capsules 94 and 104, respectively, by means of elastic and frictional forces imparted by the mesh itself on the capsule.
  • FIG. 10 is an elevational view of another embodiment of a lamp in accordance with the invention.
  • Lamp 110 employs a thick outer envelope 118 formed from pressed glass.
  • light-source capsule 112 has a thin-walled body, i.e., wall thickness x of the body of capsule 112 is less than one millimeter.
  • the use of a thin-walled capsule substantially reduces the burst containment requirements on cooperating lamp components. See United States Patent No. 4,598,225, issued July 1, 1986, to Gagnon, wherein a tungsten-halogen lamp having a thick outer wall in combination with a light-source capsule having a thin inner wall (i.e., less than .9 millimeters) is disclosed.
  • Lamp 110 thin-walled capsule 112 is employed with wire-mesh shield 114 and thick-walled envelope 118. Shield 114 is mounted on capsule 112 by means of metal strap 116. Lead-in 122 is enclosed within a dielectric sleeve to prevent contact with wire-mesh 114.
  • Lamp 110 may also have light-transmissive reinforcing means 120 disposed on the outside surface of outer envelope 118. Reinforcing means 120 may be a light-transmissive polymer coating, such as a teflon compound or perfluoroalkoxy resin, the latter being suggested in Attorney's Docket No. 87-1-095, a continuation of Serial No. 650,938, filed September 17, 1984. The reinforcing coating may be applied to the inside of the outer envelope in other embodiments.
  • FIG. 11 is an elevational cross-sectional view of the lamp of FIG. 1 wherein lamp 10 employs wire-mesh reinforcing means 50 on shield 28 and light-transmissive reinforcing coating 120 on the exterior of outer envelope 12.
  • lamp 130 demonstrates, judicious choice of various reinforcing means in accordance with the invention will enable lamps with higher wattage to be safely operated without the necessity of a protective fixture.
  • FIG. 12 is an elevational cross-sectional view of a reflector-type lamp in accordance with the invention.
  • Lamp 140 has thick-walled outer envelope 142, which is pressed glass, having light-reflecting surface 144 disposed on the interior surface thereof.
  • Light-transmissive lens 146 comprises a portion of outer envelope 142.
  • Outer envelope 142 has minimum wall thickness z, which may occur in the reflecting portion of the outer envelope or in the lens portion of the outer envelope (as shown in the drawing). Minimum wall thickness z is greater than one millimeter in accordance with the invention.
  • light-source capsule 148 is a double ended metal-halide arc tube mounted along central lamp axis A-A.
  • Light-transmissive domed shield 150 surrounds capsule 148 laterally and about one end where dome 152 provides burst restraint for lens 146.
  • Shield 150 may be mounted by means of metal straps 158 and 160 on frame wires 154 and 156, respectively. Frame wires 154 and 156 are electrically isolated from lead-in wires 162 and 164. When shield 150 is optimally positioned in accordance with the invention, lamp 140 will have improved efficacy and color rendering.
  • FIG. 13 is a pictorial view of an alternate embodiment of a reflector lamp in accordance with the invention.
  • Reflector lamp 170 includes double-enveloped tungsten-halogen light-source capsule 172 mounted within thick-walled reflectorized outer envelope 174.
  • Outer envelope 174 may be formed from pressed glass.
  • Mesh shield 176 surrounds capsule 172.
  • Shield 176 may be mounted on capsule 172 by means of elastic and frictional forces exerted by the mesh itself on the capsule or with of mounting straps about the press seals.
  • the lens has been omitted for clarity.
  • the minimum wall thickness of both the outer envelope and lens is greater than one millimeter in accordance with the teaching of the invention.
  • the outer envelope or shield (when the shield is other than quartz) may be strengthened by a suitable tempering process in which a high permanent stress is induced in the glass placing the outer surface in a high degree of compression.
  • a suitable tempering process in which a high permanent stress is induced in the glass placing the outer surface in a high degree of compression.
  • Use of tempered glass to enhance the containment capability of the outer envelope and/or shield is within the scope of the invention.
  • the outer envelope is formed from pressed glass.
  • the wall thickness of the outer envelope is generally greater than in lamps having blow-molded envelopes. Nevertheless, the containment failure problem may exist, particularly in higher-wattage lamps.
  • teachings of the present invention are intended to apply to pressed-glass envelopes as well as blow-molded envelopes, It is believed that the combination of a thick-walled outer envelope and enclosed shield is a substantial advancement of the lamp art irrespective of the lamp type or method of forming the outer envelope.
  • the metal-halide arc tube is formed from quartz glass having a body wall thickness of approximately one millimeter.
  • the shield is a quartz (or vycor) right circular cylinder, open at both ends, with wall thickness of approximately 1.5 millimeters.
  • the outer envelope is a blow-molded hard glass envelope, shaped substantially as shown in FIG. 1, having a minimum wall thickness of .040 inches ( approximately 1.02 millimeter).
  • the outer envelope is hermetically sealed enclosing an atmosphere of nitrogen at 400 Torr (0.52 bar) cold pressure.
  • a floating frame, as illustrated in FIG. 1, is employed.
  • the arc tube has an outer radius of approximately 11 millimeters.
  • the shield has an inner radius of approximately 17.5 millimeters.
  • the outer envelope has an inner radius of approximately 58 millimeters.
  • the ratio a/b is approximately .63.

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  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP88308020A 1987-08-28 1988-08-30 Doppelkolbige elektrische Lampe Expired - Lifetime EP0306269B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US9098387A 1987-08-28 1987-08-28
US90983 1987-08-28

Publications (3)

Publication Number Publication Date
EP0306269A2 true EP0306269A2 (de) 1989-03-08
EP0306269A3 EP0306269A3 (de) 1991-01-23
EP0306269B1 EP0306269B1 (de) 1996-10-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP88308020A Expired - Lifetime EP0306269B1 (de) 1987-08-28 1988-08-30 Doppelkolbige elektrische Lampe

Country Status (5)

Country Link
EP (1) EP0306269B1 (de)
JP (1) JPS6471054A (de)
AU (1) AU2165288A (de)
CA (1) CA1305995C (de)
DE (1) DE3855637T2 (de)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0290043A2 (de) * 1987-05-07 1988-11-09 Gte Products Corporation Metall-Halogenidlampe mit Wärmeabteilungsmitteln
EP0361530A2 (de) * 1988-09-30 1990-04-04 Gte Products Corporation Lampenaufbau unter Verwendung eines Schildes und eines keramischen Fasergeflechts zur Dämpfung
US4950938A (en) * 1988-11-16 1990-08-21 North American Philips Corp. Discharge lamp with discharge vessel rupture shield
WO1992010848A1 (en) * 1990-12-06 1992-06-25 Gte Products Corporation Reflector lamp assembly including metal halide arc tube
WO1992010850A1 (en) * 1990-12-06 1992-06-25 Gte Products Corporation Arc discharge lamp with spring-mounted arc tube and shroud
EP0540019A1 (de) * 1991-10-31 1993-05-05 Gte Products Corporation Montage für Metallhalogenid-Bogenentladungslampe
WO1998049616A1 (en) * 1997-04-29 1998-11-05 Zsp Corporation An apparatus and method for bit reversing and shifting
EP0903773A2 (de) * 1997-09-17 1999-03-24 Shanghai Viva Home Improvement Co., Ltd. Doppelgefäss Halogenlampe
US6133676A (en) * 1997-09-10 2000-10-17 Chen; Chun Tsun Double-enveloped halogen bulb provided with protuberances in the outer surface of the envelope
WO2002001600A1 (en) * 2000-06-29 2002-01-03 Koninklijke Philips Electronics N.V. Dome shield for protected metal halide lamps
EP2031636A1 (de) * 2006-05-31 2009-03-04 Panasonic Corporation Metalldampfentladungslampe und beleuchtungsvorrichtung
WO2012065870A1 (de) 2010-11-17 2012-05-24 Osram Ag Entladungslampe mit einem von einem drahtnetz als platzerschutz umgebenen aussenkolben

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JPH03147247A (ja) * 1989-10-19 1991-06-24 Gte Prod Corp 封じ込めのため遮蔽体およびセラミックファイバメッシュを用いたランプ組立体
JP2006164709A (ja) * 2004-12-06 2006-06-22 Osram Melco Toshiba Lighting Kk 高圧放電ランプおよび高圧放電ランプ点灯装置
DE102006030275A1 (de) * 2006-06-30 2008-01-03 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Schutzhülle für Lampen und zugehörige Baueinheit
JP6086202B2 (ja) * 2012-11-27 2017-03-01 株式会社Ｇｓユアサ 固定具及び高圧放電ランプ

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JPS5450162A (en) * 1977-09-29 1979-04-19 Iwasaki Electric Co Ltd High-pressure sodium vapor lamp
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EP0104594A2 (de) * 1982-09-23 1984-04-04 GTE Products Corporation Lampe mit zwei Lampenkolben
EP0104595A2 (de) * 1982-09-23 1984-04-04 GTE Products Corporation Glühlampe mit zwei GefäBen
GB2135820A (en) * 1983-02-25 1984-09-05 Gte Prod Corp Electric lamp with high outer-envelope to inner-envelope wall-thickness ratio
JPS59167951A (ja) * 1983-03-11 1984-09-21 Matsushita Electric Ind Co Ltd 高圧ナトリウムランプ
FR2547090A1 (fr) * 1983-06-06 1984-12-07 Jaz Ind Sa Dispositif de signalisation radioluminescent
WO1985001833A1 (en) * 1983-10-14 1985-04-25 Duro-Test Corporation Incandescent lamp with high pressure rare gas filled tungsten-halogen element and transparent thick walled safety envelope
EP0175333A2 (de) * 1984-09-17 1986-03-26 GTE Products Corporation Elektrische Lampe mit umfassender Schicht als Unterteil

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB495978A (en) * 1937-06-14 1938-11-23 Gen Electric Co Ltd Improvements in high-pressure metal-vapour electric discharge devices
FR854500A (fr) * 1938-05-10 1940-04-16 Philips Nv Lampe électrique à incandescence dont la pression de service est supérieure à 4 atomosphères
FR1057594A (fr) * 1951-06-01 1954-03-09 Gen Electric Co Ltd Lampe à vapeur de mercure
FR1242662A (fr) * 1958-12-11 1960-09-30 Philips Nv Lampe à décharge
DE1957978A1 (de) * 1969-11-18 1971-05-27 Patra Patent Treuhand Hochdruckentladungslampe
JPS5450162A (en) * 1977-09-29 1979-04-19 Iwasaki Electric Co Ltd High-pressure sodium vapor lamp
US4345178A (en) * 1977-12-29 1982-08-17 Gte Products Corporation High intensity reflector lamp
EP0104594A2 (de) * 1982-09-23 1984-04-04 GTE Products Corporation Lampe mit zwei Lampenkolben
EP0104595A2 (de) * 1982-09-23 1984-04-04 GTE Products Corporation Glühlampe mit zwei GefäBen
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Cited By (19)

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Publication number Priority date Publication date Assignee Title
EP0290043A2 (de) * 1987-05-07 1988-11-09 Gte Products Corporation Metall-Halogenidlampe mit Wärmeabteilungsmitteln
EP0290043A3 (en) * 1987-05-07 1990-12-19 Gte Products Corporation Metal-halide lamp having heat redistribution means
EP0361530A2 (de) * 1988-09-30 1990-04-04 Gte Products Corporation Lampenaufbau unter Verwendung eines Schildes und eines keramischen Fasergeflechts zur Dämpfung
EP0361530A3 (de) * 1988-09-30 1990-08-01 Gte Products Corporation Lampenaufbau unter Verwendung eines Schildes und eines keramischen Fasergeflechts zur Dämpfung
US4950938A (en) * 1988-11-16 1990-08-21 North American Philips Corp. Discharge lamp with discharge vessel rupture shield
WO1992010848A1 (en) * 1990-12-06 1992-06-25 Gte Products Corporation Reflector lamp assembly including metal halide arc tube
WO1992010850A1 (en) * 1990-12-06 1992-06-25 Gte Products Corporation Arc discharge lamp with spring-mounted arc tube and shroud
EP0540019A1 (de) * 1991-10-31 1993-05-05 Gte Products Corporation Montage für Metallhalogenid-Bogenentladungslampe
WO1998049616A1 (en) * 1997-04-29 1998-11-05 Zsp Corporation An apparatus and method for bit reversing and shifting
US5987603A (en) * 1997-04-29 1999-11-16 Lsi Logic Corporation Apparatus and method for reversing bits using a shifter
US6133676A (en) * 1997-09-10 2000-10-17 Chen; Chun Tsun Double-enveloped halogen bulb provided with protuberances in the outer surface of the envelope
EP0903773A2 (de) * 1997-09-17 1999-03-24 Shanghai Viva Home Improvement Co., Ltd. Doppelgefäss Halogenlampe
EP0903773A3 (de) * 1997-09-17 1999-06-16 Shanghai Viva Home Improvement Co., Ltd. Doppelgefäss Halogenlampe
WO2002001600A1 (en) * 2000-06-29 2002-01-03 Koninklijke Philips Electronics N.V. Dome shield for protected metal halide lamps
EP2031636A1 (de) * 2006-05-31 2009-03-04 Panasonic Corporation Metalldampfentladungslampe und beleuchtungsvorrichtung
EP2031636A4 (de) * 2006-05-31 2012-03-07 Panasonic Corp Metalldampfentladungslampe und beleuchtungsvorrichtung
WO2012065870A1 (de) 2010-11-17 2012-05-24 Osram Ag Entladungslampe mit einem von einem drahtnetz als platzerschutz umgebenen aussenkolben
DE102010044045A1 (de) 2010-11-17 2012-05-24 Osram Ag Entladungslampe
US8786187B2 (en) 2010-11-17 2014-07-22 Osram Gmbh Discharge lamp with an outer bulb surrounded by a wire gauze as explosion protection

Also Published As

Publication number Publication date
EP0306269B1 (de) 1996-10-30
CA1305995C (en) 1992-08-04
JPS6471054A (en) 1989-03-16
DE3855637D1 (de) 1996-12-05
EP0306269A3 (de) 1991-01-23
DE3855637T2 (de) 1997-05-22
AU2165288A (en) 1989-03-02

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