WO2000021117A1 - Metal halide lamp with stem mounted support frame for arc tube shield - Google Patents
Metal halide lamp with stem mounted support frame for arc tube shield Download PDFInfo
- Publication number
- WO2000021117A1 WO2000021117A1 PCT/EP1999/007016 EP9907016W WO0021117A1 WO 2000021117 A1 WO2000021117 A1 WO 2000021117A1 EP 9907016 W EP9907016 W EP 9907016W WO 0021117 A1 WO0021117 A1 WO 0021117A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- stem
- coil
- lamp
- envelope
- sleeve
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
-
- 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
- Metal halide lamp with stem mounted support frame for arc tube shield is
- the invention relates to a lamp, in particular a metal halide discharge lamp comprising, a light source (28), a glass stem (12), a pair of leads (18,22) embedded in said stem (12) for supplying electrical current to said light source (28), a protective sleeve (40) surrounding said light source (28), a glass envelope (14) surrounding said sleeve (40) and fixed to said stem (12), and a metal frame (50) supporting said sleeve (40) and mounted to the stem (12).
- a lamp in particular a metal halide discharge lamp comprising, a light source (28), a glass stem (12), a pair of leads (18,22) embedded in said stem (12) for supplying electrical current to said light source (28), a protective sleeve (40) surrounding said light source (28), a glass envelope (14) surrounding said sleeve (40) and fixed to said stem (12), and a metal frame (50) supporting said sleeve (40) and mounted to the stem (12).
- Metal halide lamps typically incorporate a tubular shield surrounding the pressurized arc tube to absorb the impact of dispersing shards in the event the arc tube fractures.
- This shield is supported by a metal frame mounted to the stem in the lamp.
- the frame is typically in two parts embedded in the stem, and these parts also serve to provide current for the electrodes of the arc tube.
- the supporting frame in order to adequately support such a protective sleeve and at the same time prevent sodium loss, it is desirable for the supporting frame to be electrically isolated from the current carriers for the arc tube.
- Mounting techniques used by OSI and GE for their high wattage protected metal halide lamps incorporate a U-shaped wire frame having metal bands welded to the ends thereof, the bands being welded in place around the glass stem. This allows the frame to be electrically isolated (floating), which is especially desirable for high wattage protected lamps.
- the multiple welding steps add to the cost of manufacture, and would preferably be eliminated.
- the lamp of the type as described in the opening paragraph is characterized in that, said metal frame comprising a wire frame member comprising a first end formed with a first coil comprising at least one loop, said coil being fixed around said stem to position said sleeve in said envelope.
- the wire frame member has a second end formed with a second coil having at least one loop, the second coil being fixed around the stem in tandem with the first coil.
- each of the coils on the ends of the frame are forced over the stem in an interference fit, and are sufficiently resilient to accommodate variations in the diameter of the stem.
- each of the coils is formed with a pair of end portions which cross over and extend beyond the coil, so that pinching the end portions together enlarges the diameter of the coil to facilitate fitting onto the stem.
- the frame is formed with upright portions which support the protective sleeve around the arc tube, which may also be supported by the frame. Between the uprights the frame is formed with an intermediate portion which engages the inside of the lamp envelope to stabilize the position of the frame, the arc tube, and the shield.
- the principles of the invention are not limited to a support frame formed by a single wire having a coil at each end, but may be used in a frame having only one frame member with a coil fitted to the stem, or two separate frame members with coils fitted to the stem.
- Figure 1 is an elevation view of a lamp with a shield supported by a frame according to the invention
- Figure 2 is an elevation view of the shield and frame mounted to the stem, as seen orthogonally to the view of Figure 1;
- Figure 3 is an elevation view of the frame;
- Figure 4 is a plan view of the frame.
- Figure 1 shows a complete metal halide discharge lamp including a screw base
- a first lead 18 and a second lead 22 are received through the stem 12 and connected to respective lead-throughs 30, 32 in opposite ends of the arc tube. These serve as electrodes for maintaining an arc.
- the first lead 18 is connected to the first lead-through 30 via braided connection 20, while the second lead 22 is connected to the second lead-through 32 via a flying lead 26 ( Figure 2).
- a starter 24 causes a glow discharge at the first end, whereupon a bimetal strip in the starter 24 opens to shunt current through lead 26 to the second electrode.
- Starting circuits are described in some detail in U.S. 5,079,480.
- the frame 50 has a first end 52 provided with a first coil 54, a first upright 58, an intermediate portion 60, a second upright 62, and a second end 64.
- Each strap 34, 36 is welded to a respective upright 62, 58 and supports the arc tube 28 somewhat as shown in U.S. Patent No. 5,339,001.
- a quartz sleeve or shield 40 surrounding the arc tube 28 is held in place by a lower retaining ring 42 and an upper retaining ring 44; these are welded to respective uprights 62, 58 with respective straps 34, 36.
- the quartz sleeve 40 absorbs the impact of flying shards of arc tube in the event of non-passive failure.
- a wire helix 46 surrounding the sleeve 40 limits radial dispersion of any quartz fragments in the event the sleeve 40 fractures, thus further protecting the glass envelope 14 in the event of arc tube failure.
- an intermediate portion 60 formed as a loop received in remote end 16 of the glass envelope with sufficient tolerance to stabilize the frame, arc tube assembly, and shield with respect to the envelope. Stabilization may also be achieved by a loop received around an internal dimple of the type shown in U.S. Patent No. 5,339,001.
- the frame 50 is formed from 0.080 inch diameter stainless steel wire.
- Each coil 54, 66 is precision formed to have an internal diameter only slightly smaller than the outside of the glass stem 12, in order to effect an interference fit.
- each coil 54, 56 may be formed with a tail 56, 68 which crosses over the respective end 52, 64 on the opposite side of the coil, thus forming a pair of end portions for each coil which cross over each other. Squeezing the end portions of a coil together opens up the coil to facilitate placement on the stem 12. Otherwise placement is accomplished by a force fit to expand the coils. The tolerances are very close, but within the purview of modern wire forming machines.
- Manufacture of the lamp unit is accomplished by first forming the stem 12 with leads 18, 22 therein, assembling the various components including the arc tube 28 and protective sleeve 40 to the frame 50, fitting the frame coils 54, 56 onto the stem, and completing the electrical connections. The glass envelope 14 is then sealed to the stem 12 and the screw base 10 and contact 11 are fitted in known fashion.
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
- Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE69916019T DE69916019T2 (en) | 1998-10-02 | 1999-09-20 | METAL HALOGENIDE LAMP WITH ARC TUBE MOUNTED STRAP FIXED ON THE LAMP |
EP99947399A EP1046189B1 (en) | 1998-10-02 | 1999-09-20 | Metal halide lamp with stem mounted support frame for arc tube shield |
JP2000575151A JP2002527860A (en) | 1998-10-02 | 1999-09-20 | Metal halide lamp with stem mounting support frame for arc discharge tube shield |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/165,681 | 1998-10-02 | ||
US09/165,681 US6153968A (en) | 1998-10-02 | 1998-10-02 | Metal halide lamp with stem mounted support frame for arc tube shield |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000021117A1 true WO2000021117A1 (en) | 2000-04-13 |
Family
ID=22599983
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1999/007016 WO2000021117A1 (en) | 1998-10-02 | 1999-09-20 | Metal halide lamp with stem mounted support frame for arc tube shield |
Country Status (6)
Country | Link |
---|---|
US (1) | US6153968A (en) |
EP (1) | EP1046189B1 (en) |
JP (1) | JP2002527860A (en) |
CN (1) | CN1288587A (en) |
DE (1) | DE69916019T2 (en) |
WO (1) | WO2000021117A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001024223A1 (en) * | 1999-09-24 | 2001-04-05 | Koninklijke Philips Electronics N.V. | Metal halide lamp with arc tube secured to frame by clips passing through protective sleeve |
WO2002001600A1 (en) * | 2000-06-29 | 2002-01-03 | Koninklijke Philips Electronics N.V. | Dome shield for protected metal halide lamps |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7187111B1 (en) | 1999-03-24 | 2007-03-06 | Advanced Lighting Technologies, Inc. | System and method for supporting ARC tubes in HID lamps |
JP2002075272A (en) * | 2000-08-29 | 2002-03-15 | Matsushita Electric Ind Co Ltd | Metal halide lamp |
US6963158B2 (en) * | 2003-08-15 | 2005-11-08 | Osram Sylvania Inc. | Mount assembly for discharge lamps |
US7057334B2 (en) * | 2004-05-17 | 2006-06-06 | Osram Sylvania Inc. | Mount for metal halide arc discharge lamp |
DE202004009859U1 (en) * | 2004-06-23 | 2004-09-16 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Frame for a discharge lamp |
JP4589397B2 (en) * | 2004-09-27 | 2010-12-01 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | lamp |
US7839066B2 (en) * | 2005-01-14 | 2010-11-23 | Osram Sylvania Inc. | Strengthened arc discharge lamp |
US7423367B2 (en) * | 2005-08-25 | 2008-09-09 | Lantis Robert M | Design of high power pulsed flash lamps |
US20070108912A1 (en) * | 2005-11-16 | 2007-05-17 | Leonard James A | Device for containing arc tube ruptures in lamps |
US7417363B2 (en) * | 2005-12-13 | 2008-08-26 | Osram Sylvania Inc. | Containment vessel for light source capsules operating at other than the pressure of a surrounding gas |
JP2011070869A (en) * | 2009-09-25 | 2011-04-07 | Iwasaki Electric Co Ltd | Ceramic metal halide lamp |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2069814A (en) * | 1930-09-17 | 1937-02-09 | Bell Telephone Labor Inc | Electric discharge device |
US2082602A (en) * | 1929-04-26 | 1937-06-01 | Gen Electric | Thermionic cathode |
GB489925A (en) * | 1937-05-21 | 1938-08-05 | British Thomson Houston Co Ltd | Improvements in and relating to electric discharge lamps |
GB737913A (en) * | 1951-06-01 | 1955-10-05 | Gen Electric Co Ltd | Improvements in or relating to high pressure mercury vapour electric discharge lamps |
US3218495A (en) * | 1962-12-06 | 1965-11-16 | Westinghouse Electric Corp | Arc tube mount and component therefor |
US3250934A (en) * | 1963-11-22 | 1966-05-10 | Sylvania Electric Prod | Electric discharge device having heat conserving shields and sleeve |
EP0186899A2 (en) * | 1984-12-28 | 1986-07-09 | GTE Products Corporation | Metal halide lamp with arc tube shield support |
US5023505A (en) * | 1989-12-20 | 1991-06-11 | Gte Products Corporation | Electric lamp with improved frame support and method of producing same |
EP0540019A1 (en) * | 1991-10-31 | 1993-05-05 | Gte Products Corporation | Metal halide arc discharge lamp assembly |
EP0549056A1 (en) * | 1991-12-23 | 1993-06-30 | Koninklijke Philips Electronics N.V. | Electric discharge lamp |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4401913A (en) * | 1981-06-03 | 1983-08-30 | Gte Products Corporation | Discharge lamp with mount providing self centering and thermal expansion compensation |
US5079480A (en) * | 1990-03-08 | 1992-01-07 | North American Philips Corp. | Bimetal/resistor switch and ceramic bridge assembly for metal halide lamps |
US5532543A (en) * | 1991-12-23 | 1996-07-02 | Philips Electronics North America Corporation | High density discharge lamp with pinched-on containment shield |
US5339001A (en) * | 1992-10-15 | 1994-08-16 | North American Philips Corporation | Electric lamp having improved support straps for planar seals |
US5998915A (en) * | 1997-05-09 | 1999-12-07 | Osram Sylvania Inc. | Mounting support for a high intensity discharge reflector lamp |
-
1998
- 1998-10-02 US US09/165,681 patent/US6153968A/en not_active Expired - Fee Related
-
1999
- 1999-09-20 WO PCT/EP1999/007016 patent/WO2000021117A1/en active IP Right Grant
- 1999-09-20 JP JP2000575151A patent/JP2002527860A/en active Pending
- 1999-09-20 CN CN99802302.7A patent/CN1288587A/en active Pending
- 1999-09-20 DE DE69916019T patent/DE69916019T2/en not_active Expired - Fee Related
- 1999-09-20 EP EP99947399A patent/EP1046189B1/en not_active Expired - Lifetime
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2082602A (en) * | 1929-04-26 | 1937-06-01 | Gen Electric | Thermionic cathode |
US2069814A (en) * | 1930-09-17 | 1937-02-09 | Bell Telephone Labor Inc | Electric discharge device |
GB489925A (en) * | 1937-05-21 | 1938-08-05 | British Thomson Houston Co Ltd | Improvements in and relating to electric discharge lamps |
GB737913A (en) * | 1951-06-01 | 1955-10-05 | Gen Electric Co Ltd | Improvements in or relating to high pressure mercury vapour electric discharge lamps |
US3218495A (en) * | 1962-12-06 | 1965-11-16 | Westinghouse Electric Corp | Arc tube mount and component therefor |
US3250934A (en) * | 1963-11-22 | 1966-05-10 | Sylvania Electric Prod | Electric discharge device having heat conserving shields and sleeve |
EP0186899A2 (en) * | 1984-12-28 | 1986-07-09 | GTE Products Corporation | Metal halide lamp with arc tube shield support |
US5023505A (en) * | 1989-12-20 | 1991-06-11 | Gte Products Corporation | Electric lamp with improved frame support and method of producing same |
EP0540019A1 (en) * | 1991-10-31 | 1993-05-05 | Gte Products Corporation | Metal halide arc discharge lamp assembly |
EP0549056A1 (en) * | 1991-12-23 | 1993-06-30 | Koninklijke Philips Electronics N.V. | Electric discharge lamp |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001024223A1 (en) * | 1999-09-24 | 2001-04-05 | Koninklijke Philips Electronics N.V. | Metal halide lamp with arc tube secured to frame by clips passing through protective sleeve |
WO2002001600A1 (en) * | 2000-06-29 | 2002-01-03 | Koninklijke Philips Electronics N.V. | Dome shield for protected metal halide lamps |
JP2004502277A (en) * | 2000-06-29 | 2004-01-22 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Dome shield of protected metal halide lamp |
Also Published As
Publication number | Publication date |
---|---|
DE69916019T2 (en) | 2005-02-24 |
JP2002527860A (en) | 2002-08-27 |
EP1046189A1 (en) | 2000-10-25 |
CN1288587A (en) | 2001-03-21 |
DE69916019D1 (en) | 2004-05-06 |
EP1046189B1 (en) | 2004-03-31 |
US6153968A (en) | 2000-11-28 |
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