EP1403905A2 - Einschnappbarer Federbügel für eine keramische Entladungslampe hoher Intensität - Google Patents

Einschnappbarer Federbügel für eine keramische Entladungslampe hoher Intensität Download PDF

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Publication number
EP1403905A2
EP1403905A2 EP20030021052 EP03021052A EP1403905A2 EP 1403905 A2 EP1403905 A2 EP 1403905A2 EP 20030021052 EP20030021052 EP 20030021052 EP 03021052 A EP03021052 A EP 03021052A EP 1403905 A2 EP1403905 A2 EP 1403905A2
Authority
EP
European Patent Office
Prior art keywords
plane
walls
shroud
base
assembly
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.)
Withdrawn
Application number
EP20030021052
Other languages
English (en)
French (fr)
Other versions
EP1403905A3 (de
Inventor
David J. Lamprey, Jr.
Ebon L. Mccullough
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
Osram Sylvania Inc
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 US10/261,137 external-priority patent/US6737791B2/en
Priority claimed from US10/324,382 external-priority patent/US6858976B2/en
Application filed by Osram Sylvania Inc filed Critical Osram Sylvania Inc
Publication of EP1403905A2 publication Critical patent/EP1403905A2/de
Publication of EP1403905A3 publication Critical patent/EP1403905A3/de
Withdrawn legal-status Critical Current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
    • H01J61/50—Auxiliary parts or solid material within the envelope for reducing risk of explosion upon breakage of the envelope, e.g. for use in mines
    • 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
    • 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 lamps and particularly to arc discharge lamps. Still more particularly, the invention relates to arc discharge lamps employing a ceramic arc tube, a shield or shroud and mounting means for mounting the arc tube within the shroud.
  • a typical metal halide arc discharge lamp includes a quartz or fused silica arc tube that is hermetically sealed within a borosilicate glass outer envelope. Recent advances in the art have employed a ceramic arc tube constructed, for example, from polycrystalline alumina. It is with the latter type that this invention is particularly concerned.
  • the arc tube itself hermetically sealed, has tungsten electrodes sealed into opposite ends and contains a fill material that may include mercury, metal halide additives and a rare gas to facilitate starting.
  • the outer envelope is filled with nitrogen or another inert gas at less than atmospheric pressure. In other cases, particularly in low wattage lamps, the outer envelope is evacuated.
  • metal halide arc discharge lamps with a shroud that comprises a generally tubular, light-transmissive member, such as quartz, that is able to withstand high operating temperatures.
  • the arc tube and the shroud are coaxially mounted within the lamp envelope with the arc tube located within the shroud.
  • the shroud is a tube that is open at both ends.
  • the arc tube has a generally tubular body sealed at the ends by a pinch seal.
  • the pinch seals provide a flattened area on the arc tube that lends itself to receiving a mounting structure that both positions the arc tube within the shroud or shield and allows the entire structure to be mounted upon a suitable frame within an envelope.
  • the shroud or shield has several beneficial effects on lamp operation.
  • the shroud reduces convective heat losses from the arc tube and thereby improves the luminous output and the color temperature of the lamp.
  • the shroud helps to equalize the temperature of the arc tube.
  • the shroud effectively reduces sodium losses and improves the maintenance of phosphor efficiency in metal halide lamps having a phosphor coating on the inside surface of the outer envelope.
  • the shroud improves the safety of the lamp by acting as a containment device in the event that the arc tube shatters.
  • the ceramic arc tube has a tubular, often bulbous body with ceramic, cylindrical capillaries extending therefrom.
  • the capillaries are relatively small, often having diameters of 3 mm or so, and contain the electrodes.
  • an object of the invention to obviate the disadvantages of spring clips of the prior art, esp. relating to the mounting of ceramic arc tubes. It is another object of the invention to enhance the mounting of arc tubes within shrouds. It is yet another object of the invention to achieve these objects in an inexpensive manner and to provide a mount assembly that has reduced costs. Still another object of the invention is the provision of an arc tube mounting assembly that can be fabricated with minimum hand-labor.
  • a spring clip that comprises a base in a first plane and having an aperture centrally located therein.
  • U-shaped projections are provided on the base and are formed from first and second upstanding walls and third and fourth upstanding walls, one at each end of the base.
  • a first lip extends orthogonally between the first wall and second wall in a second plane and a second lip extends orthogonally between the third wall and fourth wall, also in the second plane.
  • the second plane is substantially parallel to the first plane but spaced therefrom.
  • Extensions are formed with the first wall and the third wall and project away from them.
  • the extension are in substantially the same plane as base and at least one flag can be formed with at least one of the extensions. The flags project away from the extensions in a plane transverse to the first and second planes and allow the clips to be attached to a frame as will be seen below.
  • the clips are used to provide an assembly of an arc tube mounted within a shroud.
  • the assembly then comprises a light source having a center and projecting, opposite ends arrayed along a longitudinal axis, the ends being cylindrical in cross-section.
  • a tubular shroud surrounds the light source and is coaxial with the longitudinal axis.
  • the shroud has two ends, and a given wall thickness.
  • a pair of spring clips is provided, one at each end of the shroud, by fitting the U-shaped projections of the clips over the wall of the shroud.
  • An arc tube is positioned between the clips with the ends of the arc tube encompassed within the apertures in the base of the clips.
  • the clips are economical to manufacture, easy to use and avoid ergonomic problems that were associated with prior methods. They also lend themselves to automated assembly, further reducing the cost of the lamps with which they are used.
  • an arc tube mount that has a spring clip comprising a base in a first plane and having an aperture centrally located therein.
  • a U-shaped projection is provided at a first end of the base and has first and second upstanding walls.
  • a first lip extends orthogonally between the first wall and second walls in a second plane.
  • a third upstanding wall is formed at the second end of the base and an extension is formed with the third wall and projects away therefrom in the second plane.
  • the spring clip is utilized with a shroud by inserting a cylindrical end of a ceramic arc tube into the centrally located aperture of the spring clip where it is frictionally maintained and then mounting the arc tube within a shroud by fitting the U-shaped projection over the edge of the tubular shroud.
  • the U-shaped projection By forming the U-shaped projection such that it provides a spring tension on the shroud, the arc tube is maintained within the shroud.
  • a second spring clip is provided at the other end of the arc tube and similarly engages the other end of the shroud..
  • the extension, or a flag formed therewith is attached to a frame by any of a number of suitable means, as will be described hereinafter.
  • a spring clip 10 that comprises a base 12 in a first plane and having an aperture 14 centrally located therein.
  • U-shaped projections 16 and 18 are provided on the base 12 and are formed from first and second upstanding walls 20 and 22 and third and fourth walls 24 and 26, at each end of the base 12.
  • a first lip 28 extends orthogonally between the first wall and second wall in a second plane and a second lip 29 extends orthogonally between the third wall and fourth wall, also in the second plane.
  • the second plane is substantially parallel to the first plane but spaced therefrom.
  • Extensions 30 and 32 are formed with the first wall and the third wall and project away from them.
  • the extension are in substantially the same plane as base 12 and at least one flag 34 can be formed with at least one of the extensions.
  • at least one flag 34 can be formed with at least one of the extensions.
  • two flags 34 are shown.
  • the flags 34 project away from the extensions 32 in a plane transverse to the first and second planes and allow the clips to be attached to a frame as will be seen below.
  • the assembly comprises a light source 42, for example, a ceramic arc tube 44 having a bulbous center 46 and projecting, opposite ends 48, 50 arrayed along a longitudinal axis 52.
  • the ends 48, 50 are cylindrical in cross-section.
  • a tubular shroud 54 surrounds the light source 42 and is coaxial with longitudinal axis 52.
  • the shroud 54 has two ends 56, 58, and a given wall thickness.
  • Spring clips 10 are attached to the shroud 54, one at each end, by fitting the U-shaped projections 16 and 18 over the ends of the shroud.
  • the walls of the U-shaped projections are formed at an angle of 88° to the vertical, as shown in Fig. 2, thus allowing a friction fit with the walls.
  • each of the ends 48; 50 of the light source 42 are frictionally engaged in the apertures 14 of the clips.
  • the sub-assembly is mounted to a frame 60, for example by welding the flags 34 to the frame.
  • the frame can then be attached to a conventional flare 62 for assembly into a lamp envelope.
  • the frame can be mounted to the flare first and subsequently, the sub-assembly of shroud and arc tube can be mounted to the frame.
  • This structure thus provides an economical assembly for discharge lamps employing a shroud.
  • the clips themselves are easy to manufacture and provide a good structural base for mounting the arc tube or other light source.
  • the assembly 110 comprises a light source 112 having a center chamber 114 and opposite ends 116, 118, arrayed along a longitudinal axis 119.
  • the ends 116, 118 are cylindrical in cross-section.
  • the light source 112 in this instance is an arc discharge chamber constructed of polycrystalline alumina.
  • a tubular shroud 120 surrounds the light source 112 and is coaxial with the longitudinal axis 119.
  • the light source 112 is mounted within the shroud 120 by spring clips 126 one of which is mounted at either end of the shroud, see also Fig. 5.
  • the spring clips each comprise a base 128 lying in a first plane and having an aperture 130, for example, a star-shaped aperture, centrally located in the base.
  • the apertures 130 in the two spring clips frictionally engage one of the ends 116, 118 of the light source 112.
  • Each of the spring clips 126 has a U-shaped projection 132 at and end 133 of the base 126.
  • the U-shaped projection comprises first and second upstanding walls 134, 136 joined by a first lip 138 that extends in a second plane and is fitted over the wall of the shroud 120.
  • One of the upstanding walls of the U-shaped projection for example, wall 136, is formed to provide spring tension for grasping the shroud wall.
  • a third upstanding wall 140 is formed at the second end 142 of the base 128 and is provided with an extension 144 that projects away from the wall 140 in the second plane.
  • the extensions 144 are attached to a frame 146 thereby mounting the assembly.
  • the frame 146 can be a part of one of the lamp lead-ins and an electrode 148 exiting from end 116 can be electrically and mechanically attached to an arm 150 of frame 146.
  • a second electrode 150 exiting from end 118 can be electrically and mechanically attached to a second lead-in 152.
  • a flag 154 is formed with the extension 144 and extends away from the extension 144 in a plane transverse to the first and second planes and it is the flag 154 that is attached to the frame.
  • second end 142 of a spring clip 126 has an extension 144a elongated and provided with a frame-receiving aperture 156 to be pressed over a wire frame 146.
  • the embodiment shown in Fig. 7 includes a tension member 158 formed to project inwardly toward the frame 146 and apply pressure thereto to maintain the assembly 110 in position on the frame 146.
  • a second aperture 156a is provided spaced from but aligned with the first aperture 156.
  • a tension member 158a can also be provided.
  • a depending arm 160 is provided with a groove 162 to snap around a wire frame 146.
  • spring clips shown and described herein are preferably manufactured from a continuous strip of 6,35 mm (0.25") wide by 2,54 mm (0.10") thick stainless steel. Punch scrap is less than 10% providing for a very economical structure.
  • the clips reference the shroud ID in four positions and provide slack for variations in the shroud glass ID. Only two welds are necessary per mount to attach the assembly to the frame and this welding is accomplished in a single plane, thus allowing for automated welding of the assembly to the frame.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Details Of Aerials (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
EP03021052A 2002-09-30 2003-09-17 Einschnappbarer Federbügel für eine keramische Entladungslampe hoher Intensität Withdrawn EP1403905A3 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US10/261,137 US6737791B2 (en) 2002-09-30 2002-09-30 Snap-on spring clip for ceramic hid lamp
US261137 2002-09-30
US10/324,382 US6858976B2 (en) 2002-12-19 2002-12-19 Spring-clip for hid lamp
US324382 2002-12-19

Publications (2)

Publication Number Publication Date
EP1403905A2 true EP1403905A2 (de) 2004-03-31
EP1403905A3 EP1403905A3 (de) 2006-06-14

Family

ID=31981019

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03021052A Withdrawn EP1403905A3 (de) 2002-09-30 2003-09-17 Einschnappbarer Federbügel für eine keramische Entladungslampe hoher Intensität

Country Status (3)

Country Link
EP (1) EP1403905A3 (de)
JP (1) JP2004127939A (de)
CN (1) CN100480574C (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006035324A2 (en) * 2004-09-27 2006-04-06 Koninklijke Philips Electronics N.V. Lamp with protective sleeve
EP1708229A1 (de) * 2005-03-31 2006-10-04 Osram-Sylvania Inc. Entladungslampe mit Hüllkolben und Klammerhalterung
WO2007052218A1 (en) * 2005-10-31 2007-05-10 Koninklijke Philips Electronics, N.V. Mounting assembly for metal halide lamp and its shroud

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7701142B2 (en) * 2007-11-23 2010-04-20 Osram Sylvania Inc. Ceramic HID arc tube assembly
CN102437010A (zh) * 2011-11-27 2012-05-02 常州市凯凯照明电器有限公司 一种高光效道路照明高压气体放电灯

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0654191U (ja) * 1992-12-22 1994-07-22 市光工業株式会社 放電管を用いた光源構造
JPH0765790A (ja) * 1993-08-27 1995-03-10 Matsushita Electron Corp メタルハライドランプ
EP1187175A2 (de) * 2000-08-29 2002-03-13 Matsushita Electric Industrial Co., Ltd. Metallhalogenidlampe

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB826616A (en) * 1956-01-19 1960-01-13 Gen Electric Co Ltd Improvements in or relating to electric discharge lamps
GB914650A (en) * 1960-01-07 1963-01-02 Gen Electric Co Ltd Improvements in or relating to sodium vapour electric discharge lamps
GB947311A (en) * 1960-02-01 1964-01-22 Gen Electric Co Ltd Improvements in or relating to sodium-vapour-resistant glass tubing and to electric lamps incorporating such tubing
DE2932638A1 (de) * 1979-08-11 1981-02-26 Philips Patentverwaltung Elektrische lampe mit einem huelsenfoermigen sockel
DE2933359A1 (de) * 1979-08-17 1981-03-26 Philips Patentverwaltung GmbH, 22335 Hamburg Elektrische lampe mit einem huelsenfoermigen sockel
US5252885A (en) * 1989-12-11 1993-10-12 Gte Products Corporation Metal halide arc discharge lamp assembly
US5493167A (en) * 1994-05-03 1996-02-20 General Electric Company Lamp assembly with shroud employing insulator support stops
US6741034B2 (en) * 2002-08-22 2004-05-25 Osram Sylvania Inc. Starting aid for high intensity discharge lamp

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0654191U (ja) * 1992-12-22 1994-07-22 市光工業株式会社 放電管を用いた光源構造
JPH0765790A (ja) * 1993-08-27 1995-03-10 Matsushita Electron Corp メタルハライドランプ
EP1187175A2 (de) * 2000-08-29 2002-03-13 Matsushita Electric Industrial Co., Ltd. Metallhalogenidlampe

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006035324A2 (en) * 2004-09-27 2006-04-06 Koninklijke Philips Electronics N.V. Lamp with protective sleeve
WO2006035324A3 (en) * 2004-09-27 2006-07-13 Koninkl Philips Electronics Nv Lamp with protective sleeve
US7851982B2 (en) * 2004-09-27 2010-12-14 Koninklijke Philips Electronics N.V. Lamp
EP1708229A1 (de) * 2005-03-31 2006-10-04 Osram-Sylvania Inc. Entladungslampe mit Hüllkolben und Klammerhalterung
US7375456B2 (en) 2005-03-31 2008-05-20 Osram Sylvania Inc. Mount for high intensity discharge lamp
WO2007052218A1 (en) * 2005-10-31 2007-05-10 Koninklijke Philips Electronics, N.V. Mounting assembly for metal halide lamp and its shroud

Also Published As

Publication number Publication date
CN100480574C (zh) 2009-04-22
CN1497209A (zh) 2004-05-19
JP2004127939A (ja) 2004-04-22
EP1403905A3 (de) 2006-06-14

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