EP0588200A2 - Lampe à décharge à haute pression - Google Patents

Lampe à décharge à haute pression Download PDF

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Publication number
EP0588200A2
EP0588200A2 EP93114285A EP93114285A EP0588200A2 EP 0588200 A2 EP0588200 A2 EP 0588200A2 EP 93114285 A EP93114285 A EP 93114285A EP 93114285 A EP93114285 A EP 93114285A EP 0588200 A2 EP0588200 A2 EP 0588200A2
Authority
EP
European Patent Office
Prior art keywords
pressure discharge
discharge lamp
lamp according
ceramic
glass tube
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
EP93114285A
Other languages
German (de)
English (en)
Other versions
EP0588200B1 (fr
EP0588200A3 (fr
Inventor
Karl-Heinz Gleixner
Ulrich Dr. Henger
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
Application filed by Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of EP0588200A2 publication Critical patent/EP0588200A2/fr
Publication of EP0588200A3 publication Critical patent/EP0588200A3/fr
Application granted granted Critical
Publication of EP0588200B1 publication Critical patent/EP0588200B1/fr
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
    • H01J61/52—Cooling arrangements; Heating arrangements; Means for circulating gas or vapour within the discharge space
    • 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
    • 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

Definitions

  • the invention relates to a high-pressure discharge lamp according to the preamble of patent claim 1.
  • Such lamps are preferably used in open lights. Since the discharge vessel of this lamp is under high pressure during operation, special safety precautions must be taken in this type of application to prevent the discharge vessel from bursting.
  • a translucent envelope which is arranged inside the outer bulb and surrounds the discharge vessel, prevents the splinters from destroying the outer bulb of the lamp in the event of a bursting discharge vessel and possibly causing greater damage.
  • a high-pressure discharge lamp according to the preamble of patent claim 1 is disclosed in US Pat. No. 5,023,506.
  • This lamp has a discharge vessel made of quartz glass which is sealed on both sides and which is arranged inside an outer bulb.
  • the entire length of the discharge vessel is surrounded by a translucent envelope body, which consists of two glass tubes arranged coaxially with the discharge vessel, the open ends of which are closed by means of disk-shaped, metallic end caps.
  • the end caps prevent fragments of a burst discharge vessel from leaving the envelope bulb.
  • the end caps in the cited prior art consist of metal. So that there are no problems with the electrical insulation and photoelectrons, which are released from the metallic end caps by the UV radiation generated in the discharge, and would have a negative effect on the discharge, the end caps are provided with an insulating coating, which is relatively expensive.
  • the end caps disclosed in the cited prior art also make evacuation of the enveloping body more difficult.
  • the high-pressure discharge lamps according to the invention have an envelope for the discharge vessel, which is fastened to the lamp frame, which also carries the discharge vessel, by means of two ceramic holders. Neither the envelope body nor the two ceramic holders have metallic parts, so that the problems mentioned above in the cited prior art with the electrical insulation and the occurrence of photoionization in the end caps cannot occur here.
  • the shape of the ceramic holder prevents UV irradiation of power supply elements.
  • the enveloping body advantageously consists of two glass tubes arranged coaxially with the discharge vessel.
  • the ceramic holders which are equipped with guide elements, engage in the open ends of these glass tubes in order to enable the two glass tubes to be centered and fixed in position, the glass tubes advantageously not touching one another.
  • the ceramic holders have a cross-shaped or ring-shaped design with a web. This ensures an adequate connection of the cavities of the enveloping body with the interior of the outer bulb, so that no problems arise when evacuating the enveloping body.
  • the inner glass tube of the envelope body of the high-pressure discharge lamp according to the invention not only serves as a burst protection, but also acts as a heat accumulation tube.
  • the heat generated by the discharge vessel accumulates in it and ensures a more uniform temperature distribution along the discharge vessel.
  • This glass tube is advantageously provided with a translucent coating which reflects IR rays and which further increases the heat accumulation effect.
  • one of the two glass tubes of the enveloping body advantageously has a filter for UV rays, so that the enveloping body is essentially impermeable to UV rays.
  • FIG. 1 shows a first exemplary embodiment of a high-pressure discharge lamp according to the invention which is capped on one side.
  • the lamp has an outer bulb 1, which has a screw base 2 and a foot melting 3 at one end.
  • Inside the outer bulb 1 there are a getter 1a and a bilaterally sealed, axially aligned discharge vessel 4 made of quartz glass, in which an ionizable filling and two electrodes 5 are enclosed gas-tight.
  • two lamp current leads 6 are led out, which are electrically conductively connected to one of the electrodes 5 each via a gas-tight melted-down molybdenum foil 7.
  • the entire length of the discharge vessel 4 is surrounded by a cylindrical, translucent, double-walled envelope body 8, which consists of two quartz glass tubes 8a, 8b arranged coaxially with the discharge vessel 4.
  • the outer glass tube 8a has an inner diameter of approximately 22 mm and a length of approximately 60 mm, while the inner glass tube 8b has an inner diameter of approximately 16 mm and a length of approximately 54 mm.
  • Both glass tubes 8a, 8b have a wall thickness of approximately 1.3 mm.
  • the position fixation of the discharge vessel 4 and the two glass tubes 8a, 8b within the outer bulb 1 is carried out by a two-part metallic lamp frame 9 with two frame brackets 9a, 9b, which in turn is fastened in the plate base 3 and to a bulge 10 of the outer bulb dome.
  • each part 9a, 9b of the lamp frame 9 is equipped with a cross strut 11a or 11b running transversely to the lamp axis and transversely to the envelope body axis, to each of which one of the power supply lines 6 of the discharge vessel 4 is welded.
  • the ceramic holders 12 which consist of a technical ceramic, have on their surface facing away from the enveloping body 8 a gap-like depression 14 for receiving a cross strut 11a or 11b.
  • the cross struts 11a, 11b are part of the lamp or burner frame 9a, 9b and consist of nickel stamped sheet metal parts.
  • the ceramic holders 12 are pressed against the end faces, ie against the open ends of the enveloping body 8, by means of these cross struts 11a, 11b.
  • the ceramic holders 12 are each in the form of a circular ring 20 with a ring ring running along a ring diameter Web 19 formed.
  • FIGS 2a to 2c show different views of this ceramic holder 12.
  • the circular ring 20 of the ceramic holder 12 is designed step-like. In its first stage 20a, it has an outer diameter of approximately 25 mm. In the second stage 20b, the circular ring 20 still has an outer diameter of approximately 22 mm, while the third and last stage 20c has an outer diameter of approximately 15 mm.
  • the ceramic holders 12 each abut an end face of the outer glass tube 8a.
  • the second stage 20b of the circular ring 20 fits into the corresponding open end of the outer glass tube 8a and lies against the inner wall of the outer glass tube 8a.
  • the contact surface of the second step 20b of the corresponding end face of the inner glass tube 8b serves as a stop.
  • the third stage 20c fits into the open end of the inner glass tube 8b and centers it.
  • the outer diameter of the circular ring 20 in the second stage 20b and third 20c stage are thus matched to the inner diameter of the glass tubes 8a and 8b, so that the enveloping body 8 is centered overall by the ceramic holder 12.
  • Both ceramic holders 12 have a central, continuous bore 13 provided with a countersink, which is arranged centrally on the web 19 and through which one of the lamp current feeds 6 is guided.
  • the web 19 has a width of approximately 5 mm and a thickness of approximately 3 mm. It is arranged approximately in the same plane as the second stage 20b.
  • the greatest thickness of the circular ring 20 is approximately 6.5 mm. Its inside diameter measures approximately 13.5 mm.
  • the gap-like depression 14 for one of the cross struts 11a or 11b is provided on the upper side of the ceramic holder 12, which faces away from the enveloping body 8. It runs parallel to the web 19.
  • the depth of the gap-like recess 14 corresponds approximately to the thickness of the first step 20a of the circular ring 20.
  • the length of the recess 14 is dimensioned such that the first step 20a of the circular ring 20 through the recess 14 is not in two Parts is disassembled (Figure 2b).
  • a small bridge 15 remains, which prevents electrical arcing between the frame bracket 9b and the cross strut 11a when the ignition voltage is applied.
  • FIGS. 3a and 3b show the ceramic holders 12 'according to a second exemplary embodiment of the high-pressure discharge lamp according to the invention.
  • the second embodiment differs from the first embodiment only in the ceramic holder 12 '.
  • the ceramic holder 12 'of the second embodiment is cross-shaped.
  • the two crossbars 30 lie in one plane, enclose a right angle and, like the circular ring 20 in the first exemplary embodiment, are designed in three stages.
  • the length of the cross bars 30 of the ceramic holder 12 ' is approximately 25 mm, 22 mm and 15 mm in the first 30a, second 30b and third 30c steps.
  • the ceramic holders 12 ' engage with their second 30b or third 30c step in a fitting manner in the open ends of the outer 8a or inner 8b glass tube and center them.
  • Ceramic holder 12 ' with its first step 30a on one end of the outer glass tube 8a and with its second step 30b on one end of the inner glass tube 8b.
  • the two glass tubes 8a, 8b are held without contact between the two ceramic holders 12 '.
  • Both ceramic holders 12 ' also have a central through-bore 13' through which one of the lamp power supply lines 6 is guided.
  • One of the two crossbeams 30 of each ceramic holder 12 ' has on its upper side, which faces away from the enveloping body 8, a gap-like recess 14' into which one of the cross struts 11a or 11b engages. These gap-like depressions 14 'do not extend over the entire length of the relevant crossbars 30.
  • the discharge vessel 4, similarly to the first exemplary embodiment, is led through the lamp current feeds 6, which pass through the bores 13' and with the corresponding cross strut 11a and 11b, respectively are welded, centered and held within the enveloping body 8.
  • the ceramic holders 12 ''' according to a third exemplary embodiment of the high-pressure discharge lamp according to the invention.
  • the third exemplary embodiment differs from the first two exemplary embodiments only in the ceramic holder 12 ′′. These exemplary embodiments are the same in all other details.
  • the two ceramic holders 12 ′′ are essentially designed as a circular disk. They each have a central, continuous hole 13 '' for each of the lamp power supply lines 6.
  • the ceramic holders 12 '' On their upper side, the ceramic holders 12 '' have an annular bead 40, which is only supported by two gap-like depressions 14 '' running along a secant, which serve to receive the frame cross members 11a, 11b, and is partially interrupted by two U-like recesses 41 in the ceramic holder 12 ′′.
  • the ceramic holders 12 ′′ are provided on the underside with three step-like shoulders 42a, 42b, 42c. Apart from the U-like recesses 41, the shoulders 42, 42b, 42c are circular disk-shaped and have diameters which, in the case of the heels 42b and 42c, are matched to the inner diameter of the outer 8a or inner 8b glass tube.
  • the diameter of the ceramic holder 12 '' at paragraph 42a is approximately 25 mm.
  • the undersides of the step-like shoulders 42a or 42b rest on the ends of the outer 8a or inner 8b glass tube.
  • the shoulders 42b and 42c fit into the open ends of the outer 8a and inner 8b glass tubes and center them.
  • the U-like recesses 41 of the ceramic holder 12 ′′ are dimensioned such that all the cavities of the enveloping body 8 are connected to the interior of the outer bulb 1 and can be evacuated with it without problems.
  • the two ceramic holders 12 ' can also be designed star-shaped or Y-shaped instead of cross-shaped, in the latter case the three ends or struts each forming an angle of, for example, 120 ° with one another. It is also possible to instead the steps or step-like shoulders in the above exemplary embodiments also to use groove-like depressions in the underside of the ceramic holder as guide elements for the glass tubes of the enveloping body.
  • the two glass tubes of the enveloping body consist of quartz glass in all exemplary embodiments.
  • the inner or outer glass tube can be provided with an IR radiation reflecting coating on its inner or outer surface to improve the heat accumulation effect.
  • One of the two glass tubes can also be equipped with a UV filter.
  • This UV filter can be designed as a coating absorbing UV rays or reflecting UV rays or as a doping of the envelope glass with atoms or ions or molecules absorbing UV rays. It is also possible to manufacture both glass tubes or only the outer glass tube of the enveloping body, which is exposed to a lower thermal load, from tempered glass.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
EP93114285A 1992-09-15 1993-09-06 Lampe à décharge à haute pression Expired - Lifetime EP0588200B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4230814A DE4230814A1 (de) 1992-09-15 1992-09-15 Hochdruckentladungslampe
DE4230814 1992-09-15

Publications (3)

Publication Number Publication Date
EP0588200A2 true EP0588200A2 (fr) 1994-03-23
EP0588200A3 EP0588200A3 (fr) 1995-01-11
EP0588200B1 EP0588200B1 (fr) 1996-01-31

Family

ID=6467991

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93114285A Expired - Lifetime EP0588200B1 (fr) 1992-09-15 1993-09-06 Lampe à décharge à haute pression

Country Status (4)

Country Link
US (1) US5446336A (fr)
EP (1) EP0588200B1 (fr)
JP (1) JPH06124690A (fr)
DE (2) DE4230814A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2719733A1 (fr) * 1994-05-03 1995-11-10 Gen Electric Ensemble de lampe avec protection utilisant des butées de support isolantes.
EP0803899A4 (fr) * 1995-10-30 1998-08-19 Seiko Epson Corp Lampe et lecteur d'images l'utilisant
WO2000075958A1 (fr) * 1999-06-02 2000-12-14 Koninklijke Philips Electronics N.V. Lampe a halogenure de metal avec un manchon de protection
EP1180787A1 (fr) * 2000-08-08 2002-02-20 Matsushita Electric Industrial Co., Ltd. Lampe à décharge à vapeur de métal

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2147517C (fr) * 1994-04-25 2006-03-21 Walter Newman Douille de lampe a culot goliath
US5594294A (en) * 1994-10-31 1997-01-14 General Electric Company Lamp assembly with a resilient retaining lamp mount structure
WO2001073817A1 (fr) * 2000-03-28 2001-10-04 Robert Bosch Gmbh Lampe a decharge gazeuse comprenant des electrodes auxiliaires d'allumage, notamment destinee a des phares d'automobile
US20050095946A1 (en) * 2003-11-05 2005-05-05 Fridrich Elmer G. Mounting light source filament tubes and arc tubes in lamps
US20050093454A1 (en) * 2003-11-05 2005-05-05 Fridrich Elmer G. Light source bodies for filament tubes and arc tubes
US7322870B2 (en) * 2003-11-05 2008-01-29 Fridrich Elmer G Apparatus and process for finishing light source filament tubes and arc tubes
US20050093420A1 (en) * 2003-11-05 2005-05-05 Fridrich Elmer G. Spurred light source lead wire for handling and for assembling with a filament
US7107676B2 (en) * 2003-11-05 2006-09-19 Fridrich Elmer G One piece foliated leads for sealing in light sources
US20050092613A1 (en) * 2003-11-05 2005-05-05 Fridrich Elmer G. Two-bath electrolysis
EP1763066B1 (fr) * 2004-06-29 2010-10-06 Panasonic Corporation Lampe halogenure metallique et appareil d'éclairage utilisant ladite lampe
US20060049733A1 (en) * 2004-09-07 2006-03-09 Osram Sylvania Inc. Protected Metal Halide Lamp
US7025612B1 (en) 2005-03-18 2006-04-11 Lsi Industries, Inc. Base for a mogul-based lamp
USD542735S1 (en) * 2005-03-18 2007-05-15 Lsi Industries, Inc. Lampsocket base
JP4130842B2 (ja) 2006-05-31 2008-08-06 松下電器産業株式会社 金属蒸気放電ランプ及び照明装置
DE102009051537A1 (de) * 2009-10-30 2011-05-05 Osram Gesellschaft mit beschränkter Haftung Platzergeschützte Lampe

Family Cites Families (8)

* Cited by examiner, † Cited by third party
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
US4665344A (en) * 1984-04-25 1987-05-12 Ngk Insulators, Ltd. Ceramic envelope device for high-pressure discharge lamp
US4975620A (en) * 1985-11-28 1990-12-04 Iwasaki Electric Co., Ltd. Metal vapor discharge lamp and method of producing the same
DE3702481A1 (de) * 1987-01-28 1988-08-11 Philips Patentverwaltung Gasentladungslampe
US4839565A (en) * 1987-04-03 1989-06-13 General Electric Company High pressure double wall sodium arc tube and methods of operating such
DE8908561U1 (de) * 1989-07-13 1989-09-21 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München Hochdruckentladungslampe
US5039912A (en) * 1989-09-08 1991-08-13 U.S. Philips Corporation High-pressure discharge lamp
US5023506A (en) * 1989-12-28 1991-06-11 North American Philips Corporation Explosion proof high pressure discharge lamp

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2719733A1 (fr) * 1994-05-03 1995-11-10 Gen Electric Ensemble de lampe avec protection utilisant des butées de support isolantes.
EP0803899A4 (fr) * 1995-10-30 1998-08-19 Seiko Epson Corp Lampe et lecteur d'images l'utilisant
EP0989588A1 (fr) * 1995-10-30 2000-03-29 Seiko Epson Corporation Lampe et appareil de lecture d'image apte à en faire usage
US6222647B1 (en) 1995-10-30 2001-04-24 Seiko Epson Corporation Lamp unit and image reading apparatus using the same
WO2000075958A1 (fr) * 1999-06-02 2000-12-14 Koninklijke Philips Electronics N.V. Lampe a halogenure de metal avec un manchon de protection
EP1180787A1 (fr) * 2000-08-08 2002-02-20 Matsushita Electric Industrial Co., Ltd. Lampe à décharge à vapeur de métal

Also Published As

Publication number Publication date
EP0588200B1 (fr) 1996-01-31
DE59301543D1 (de) 1996-03-14
DE4230814A1 (de) 1994-03-17
US5446336A (en) 1995-08-29
JPH06124690A (ja) 1994-05-06
EP0588200A3 (fr) 1995-01-11

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