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EP1730766B1 - Systeme d'electrodes pour lampe a decharge gazeuse haute pression - Google Patents

Systeme d'electrodes pour lampe a decharge gazeuse haute pression Download PDF

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Publication number
EP1730766B1
EP1730766B1 EP04802774A EP04802774A EP1730766B1 EP 1730766 B1 EP1730766 B1 EP 1730766B1 EP 04802774 A EP04802774 A EP 04802774A EP 04802774 A EP04802774 A EP 04802774A EP 1730766 B1 EP1730766 B1 EP 1730766B1
Authority
EP
European Patent Office
Prior art keywords
winding
electrode system
filament
shank
diameter
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
EP04802774A
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German (de)
English (en)
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EP1730766A2 (fr
Inventor
Anton Dambacher
Helmut Davideit
Klaus Meyer
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
Osram GmbH
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 DE102004012242A external-priority patent/DE102004012242A1/de
Application filed by Osram GmbH filed Critical Osram GmbH
Publication of EP1730766A2 publication Critical patent/EP1730766A2/fr
Application granted granted Critical
Publication of EP1730766B1 publication Critical patent/EP1730766B1/fr
Anticipated expiration legal-status Critical
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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
    • H01J61/06—Main electrodes
    • H01J61/073—Main electrodes for high-pressure discharge lamps
    • 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
    • H01J61/04—Electrodes; Screens; Shields
    • H01J61/06—Main electrodes
    • H01J61/073—Main electrodes for high-pressure discharge lamps
    • H01J61/0732—Main electrodes for high-pressure discharge lamps characterised by the construction of the electrode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
    • H01J61/366—Seals for leading-in conductors

Definitions

  • the invention is based on an electrode system for a high-pressure discharge lamp according to the preamble of claim 1.
  • electrodes for high-pressure discharge lamps which contain mercury and / or sodium.
  • One field of application are, for example, metal halide lamps, another in particular high-pressure sodium lamps.
  • the implementation is more massive than the shaft and accordingly, the winding of significantly thicker wire than the helix.
  • Common electrode systems for low wattages to about 100 W are often in three parts, the implementation is designed in two parts with a connector to the electrode shaft of molybdenum pin and a niobium pin as the tail.
  • Higher Watt lamps are often three or four parts, they use as a connector usually a pin-shaped cermet.
  • Another object is to provide a lamp with such an electrode system.
  • a rigid connection between helix and winding is produced, which improves the quality and leads to better reproducible results in the behavior of the lamp.
  • Such a link has not yet been considered because of the completely different requirement profiles for helix and winding.
  • the electrode system does not matter how exactly the electrode system is constructed.
  • it consists at least of an electrode shaft with a head which is designed as a helix, and a connection part. At least on a part of the connection part, an enveloping winding is applied.
  • connection part may on the one hand be integrally connected to the electrode shaft.
  • the integral part usually consists of a pin, which is made of tungsten.
  • connection part can also be a separate part. In this case it is often structurally associated with a part of the bushing which is attached to the connecting part. Common are connecting parts made of molybdenum, tungsten or cermet. In this case, the diameter of the connection part is often noticeable (up to 150%) or even significantly (up to 400%) larger than the diameter of the electrode shaft.
  • the concept according to the invention can take account of the fact that, with a very large difference in the diameter of the helix and the winding, these two parts are made of separate workpieces which are connected to one another.
  • a typical rigid connection can be achieved, for example, by welding, soldering or entangling.
  • coil and winding are connected to one another via a so-called winding interruption.
  • This embodiment develops particular advantages when the diameter of the electrode shaft and connecting part are not chosen too different and do not differ from each other by more than 50%, in particular even being equal to 20%.
  • coil and winding can be made in one piece from a wire.
  • This technique has the advantage that coil and winding are applied directly to the electrode system in one operation, and not separately manufactured as usual and then laboriously must be applied separately.
  • this new technique represents a quantum leap in cost reduction and quality improvement for electrode systems and high pressure discharge lamps made therewith.
  • the invention enables the experts to simplify and reduce the cost of producing ceramic discharge vessels equipped with electrodes. In particular, the development of lamps with low power is in the spotlight. Because the simple and reliable manufacturing method allows for the first time small tolerances in the production, especially of small wattages in the range of 20 to 75 W.
  • connection part often also consists of an electrically conductive cermet consisting of molybdenum and Al 2 O 3 with approximately equal proportions, as is known per se. This embodiment is more common for smaller wattages up to 150W.
  • the winding on the connecting part can be modified by a further winding. This further winding may have approximately the same properties as the first winding and a complementary second layer of the same material on the first winding form, or also consist of other material, or be designed for better stabilization as Umspinnungsdraht on the actual winding.
  • Another embodiment for higher wattages uses a four-part electrode system, wherein between connecting part, often made of molybdenum, and tail, often made of niobium, an intermediate piece, usually a cermet, is introduced.
  • the various components of the electrode system which is usually two to four parts, welded or soldered or mechanically connected, for example by crimping or plugging.
  • the electrode system according to the invention is used in ceramic discharge vessels for high-pressure discharge lamps. It does not matter whether the discharge vessel is closed on one or two sides.
  • the electrode is held in the discharge vessel via its shaft, for example through a passage which is part of or attached to the shaft, this passage being sealed in a ceramic capillary, as known per se.
  • the helix on the electrode shank can be flush with the shank, or even project or reset.
  • Starting material is for example an endless winding containing winding sections and interruptions of the winding.
  • a first winding section can form the helix ( W ), forming an adjacent, second winding section spaced apart from a so-called interruption ( U ), the winding ( W ).
  • WUW- Gewickel of any length, in particular with any length of the wound segments and the interruptions, can be produced and used.
  • a typical lamp with at least one electrode system has at least one discharge vessel containing metal vapor, in particular mercury and / or sodium, wherein the discharge vessel is made of ceramic.
  • the discharge vessel is made of ceramic.
  • it is relatively low-wattage lamps with a power of 20 to 400 W.
  • the preferred manufacturing method for producing an electrode system may also be modified in that instead of a continuous core pin, which solves the task of the shaft and the connection part in one, a core pin is used, which is composed of two parts with different diameters.
  • the cutting of the endless wound into sections is preferably carried out by wire eroding or by using laser pulses.
  • Such a coil has good dimensional stability.
  • the helix can not slip anymore.
  • a flush finish of the helix at the core pin is preserved.
  • a drop of the coil under heavy load is now excluded.
  • a cost-effective three-piece design is now possible instead of a complex four-part design, as a front piece can be tailored in length, which also allows the welding node to be moved out of the hot zone.
  • Another advantage is that in cooler regions the better adapted cermet can be used.
  • a three-piece design was not possible with large wattages, because on the one hand a cermet material is not sufficiently heat-stable and, conversely, an extension of the core pin into the passage is prohibited because of the large dead volume in the capillary resulting from this measure.
  • no molybdenum pin can be used, because then the seal does not work properly. A large pin of molybdenum is too little adapted in the coefficient of thermal expansion of the ceramic of the capillary.
  • the new manufacturing process for an electrode system with helix and winding makes the production much easier and less expensive and facilitates automation.
  • the new electrode is very well suited for laser production.
  • an Nd-YAG laser is used for this work.
  • the laser can be used as a cutting tool or for material processing, especially the removal.
  • a particularly straight, burr-free cut is achieved
  • a protruding core pin can be achieved at the tip of the electrode in a simple non-contact manner.
  • Another field of application of the laser is that the cross-sectional area of the spacer can thus be elegantly reduced locally.
  • This partial ablation serves to reduce the heat flow between coil and winding.
  • both the height and the width of the wire can be reduced.
  • the height is reduced, because thus at this point the outer diameter can be reduced.
  • the distance to the capillary of a ceramic discharge vessel is thereby increased, which reduces the risk of cracks.
  • Another application is to reduce the thickness of the winding by subsequently the last turns are reduced in height. advantageous In the end, the weldability is improved and the embedment in the ceramic, which surrounds the terminal pin, succeeds better.
  • Typical is a height reduction of 30 to 65%. This is especially important for small wattages up to 100 W.
  • connection part can be provided separately and possibly postponed later. But it can also be made directly from the wire of the integral. It can be single-layer or double-layered and realized as a single or double wrapping. Another possibility is a single-layer wrapping wrap.
  • FIG. 1 schematically shows as a section of a metal halide lamp 1 with two-sided closed ceramic discharge vessel 2 with a power of 150 W.
  • the electrodes 3 consist of pins 4, which have constant diameter as the electrode shaft. It is about 500 microns.
  • a coil 5 of 180 ⁇ m in diameter is mounted on the shaft 4.
  • a metal halide is filled in the discharge vessel 2, a metal halide is filled.
  • the ends 6 of the discharge vessel are closed by capillaries 7, which tightly enclose a two-part bushing 8, 9, consisting of an inner connecting part 8 and an outer end piece 9.
  • the end piece 9 is a niobium pin.
  • Fig. 2 shows in detail one end of the discharge vessel 2.
  • the end piece 9 is sealed by means of glass solder 10 in the capillary 7.
  • the connecting part 8 is made of molybdenum. It is a pin (hidden), which is surrounded by a winding 11 made of molybdenum.
  • the diameter of the connecting part 8 is considerably larger than that of the core pin 4 acting as shaft of the electrode.
  • the helix 5 serving as the electrode head on the shank is connected to the winding 11 via an interruption 12 comprising one or more windings. The number of turns is preferably one to three.
  • Fig. 3 schematically shows another embodiment of an electrode system 13 for the lamp of FIG. 1 in detail. It consists of a continuous pin 4, which simultaneously performs the task of the shaft and the connecting part.
  • a coil 5 is applied, which comprises about 6 turns of a wire and is cut flush.
  • a winding 11 of the same wire which consists of tungsten, is applied. It comprises about 30 turns.
  • Coil 5 and winding 11 are integrally manufactured and connected via an interruption 12, which comprises a winding. The distance between helix and winding corresponds approximately to three times the length of the helix. 5
  • the distance between filament and winding preferably increases with the wattage.
  • the electrode system 13 is similar to FIG. 3 built up.
  • coil 5 and coil 11 are not integral but separate.
  • the winding 11 is made of molybdenum, since this is best suited for adaptation to the thermal expansion coefficient of the ceramic of the capillary 7.
  • Such electrode systems must not be overly stressed because of the relatively low melting point of molybdenum. In other words, these systems are well suited for powers up to 100 W, but only to a limited extent.
  • Other suitable materials for the electrode system are tungsten, tantalum and rhenium, alone or in combination. Possibly. one material serves as a coating on the other.
  • the wire diameter of the winding 11 is significantly smaller than that of the helix 5 in order to keep the dead volume as small as possible.
  • the coil and the winding are connected to each other via a welding point S at the end of the interruption.
  • the electrode system 13 is completed by the fact that the end piece 9 of the niobium leadthrough of significantly larger diameter is welded onto the connection part 8.
  • the outer diameter of the winding and the diameter of the Niobstifts are about the same size.
  • the solution to the problem of thermal matching is to fabricate the winding from a suitable combination of materials. This is especially true for heavily loaded lamps.
  • an electrode system 13 is shown in section, in which the problem of adjusting the coefficient of thermal expansion compared to the material of the capillary is solved by acting on the actual winding 11, which consists of tungsten and as in FIG. 3 integral with the coil, a second coil 26 is applied which consists of molybdenum.
  • the coil 14 is usually made because of the minimization of the dead volume of thinner wire, usually 20 to 50% thinner.
  • FIG. 6 For example, a portion of an electrode system that uses a standard component as a front piece 20 at the discharge exposed end of the electrode system is shown. It consists of a core wire 21, which forms the shaft and the adjoining first portion of the connecting part.
  • the coil 22 is mounted on the first end of the shaft, in particular so that the coil 22 is flush with the shaft.
  • the winding 23, which has the same length as the coil 22, is also mounted flush with the second end of the shaft with an interruption 24 therebetween. Due to the same length of coil 22 and winding 23, the component is symmetrical, which greatly simplifies the use in manufacturing, because due to the symmetry does not have to be paid to the orientation of the component during installation. In other words, coil and winding are here designed as similar parts that can be interchanged.
  • FIG. 7 It is shown how the front piece 20 is attached to other components of the implementation.
  • the front piece 20 with a middle part or intermediate piece 25 made of cermet, which is wrapped with a separate winding 26, welded.
  • the end piece 27 made of niobium, also via welding. The classical boundaries between electrode and bushing are thus removed in favor of constructive advantages.
  • the particular advantage of this arrangement is that here the outer diameter of the winding 23 and the separate coil 26 of the central part 25 need not be the same size, since the front piece 20 can be optimized in terms of geometry and material to the needs of the coil 22, while the middle part 25th can be optimized for an enveloping and sealing effect in the capillary.
  • FIG. 8a and 8b an electrode system 30 is shown in which the advantages of a fixed distance between coil 35 and winding 39 are demonstrated.
  • the front piece 31 is novel according to FIG. 8a designed.
  • connector 32 and tail 33 may be conventional, so for example, by a molybdenum-wound 39 on a molybdenum pin 34 a (dashed) is applied and with an end piece 33, a pin of niobium, welded.
  • a front piece 31 is used, according to Fig. 8a consists of a shaft 34 made of tungsten, on which a filament 35 of tungsten is applied.
  • an interruption 36 is still wound on the shaft 34, which extends to the rear end 37 of the shaft.
  • This front piece 31 can be welded to the conventional connection part 32.
  • the highly schematically illustrated welding connection point 38 connects not only the core pins 34 and 34a, but also the interruption 36 with the winding 39. Again, geometry and materials can be optimized due to the decoupling between the front piece and middle part to the specific requirements.
  • FIG. 9 an electrode system 13 is shown, in which the assembly has a core pin 4 as a shaft and integral connection part. While the coil 5 is seated at the discharge end of the shaft 4 as usual, the coil 11 is longer than the connector 4 'hidden therein so that the end piece can be inserted into the cavity 15 at the rear end of the connector and then crimped. This can be dispensed with a welding process.
  • FIG. 10 is an alternative to FIG. 9 shown in the only difference at the rear end of the connecting part 4 'is an additional interruption 16 is set, without a core pin.
  • the tail is inserted into the cavity 15 and crimped by interruption 16.
  • FIG. 11 is an electrode system 13 shown with a three-part design: an asymmetrical front piece 17 with a continuous core pin 4, the shaft and forms the first part of the connection part. On it sits a short coil 18 and a long winding 19. This is a cermet pin 28 welded to surrounding Molybdnatureewickel, this in turn, an end piece 9 is welded. The welding point is designated in each case by 38.
  • FIG. 12 a front piece 17 is shown, in which the interruption 40 is two turns long.
  • the ratio between the outer diameter of the coil 14 and the outer diameter of the winding 29 is 1: 3.
  • a suitably sized centerpiece can be fitted.
  • a concrete example of a dimension is a 70 W lamp in which the shaft 21 has a diameter of 250 ⁇ m and the wire wound thereon for coil and winding has a diameter of 150 ⁇ m.
  • a symmetrical front piece made of it (see FIG. 6 and 7 ) has a length of the coil 22 of 1.1 mm, a length of the interruption 24 (1 turn) of 1.8 mm and a length of the winding 23 of again 1.1 mm.
  • An attached central part 25, which is wrapped with molybdenum wire 26, has a length of 8.5 mm with a core pin of 400 microns in diameter and a winding wire of 140 microns in diameter.
  • An attached end piece 27 made of niobium has a length of 16.8 mm and consists of a niobium pin with 730 microns in diameter.
  • the dimensioning of a 35 W lamp provides: the niobium pin 27 has a diameter of 610 microns; the center molybdenum core pin 25 has a diameter of 300 ⁇ m and is wrapped by a molybdenum wire 26 of 130 ⁇ m in diameter; the core pin 21, which acts as a continuous part for the electrode shaft and the connection part, has a diameter of 154 ⁇ m; on him a coil 22, interruption 24 and winding 23 is wound from a wire of 122 microns in diameter.
  • the dimensioning of a 150 W lamp provides: the niobium pin 27 has a diameter of 880 microns; the center molybdenum core pin 25 has a diameter of 540 ⁇ m and is wrapped by a molybdenum wire 26 of 150 ⁇ m in diameter; the core pin 21, which acts as a continuous part for the electrode shaft and the connection part, has a diameter of 500 ⁇ m; on him a coil 22, interruption 24 and winding 23 is wound from a wire of 180 microns in diameter.
  • the diameter DA of the connecting part can be between 50 and 400% of the diameter DS of the shaft.
  • separate filament and winding can be rigidly connected to each other by either the end of the interruption to the beginning of the winding or the coil is welded. while the interruption is either attached to the winding or coil integral.
  • the interruption may also be separate from filament and winding and then requires two welds. Instead of welding or soldering etc., a purely mechanically rigid connection is possible, for example by threading the interruption in the u.U. bent end of the coil or winding similar to the techniques known for halogen incandescent lamps.
  • the interruption can also be formed as a straight spacer 41, which is used for example via welds 42 between coil 5 and winding 11, see FIG. 13 ,
  • FIG. 14 an embodiment is shown in which the core wire 21 is wound by an interruption 24, which is partly an intact wire portion 24u and partly a wire portion 24r, wherein the diameter is removed to about 60%, which can be most easily realized by means of laser processing. In this way the heat flow from the head of the electrode to the back is suppressed.
  • FIG. 15 shown, in principle, the representation of FIG. 9 shows, but with the difference that here the interruption is evenly constricted laterally (41) or is constricted on one side (42). Both can be produced again by means of laser, but also mechanically.
  • FIG. 16 it is shown that a terminal part 45 of the winding 11, which is thus located at the discharge-distal end, may have a reduced diameter in order to optimize the region of the winding which comes into contact with the ceramic or glass solder 10; see for a better understanding FIG. 2 ,
  • the pin 4 and the interruption 12 and the coil 5 correspond to the in FIG. 2 shown arrangement. Again, the removal of the height in part 45 is best done with the laser.

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  • Discharge Lamp (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Claims (18)

  1. Système d'électrode (13 ; 30) pour une lampe à décharge à haute pression (1) avec une enceinte de décharge en céramique, se composant d'au moins une électrode, qui possède une tige en forme de barre (4 ; 21 ; 34) avec un filament (5 ; 18 ; 22 ; 35) monté sur la tige à proximité de l'extrémité libre de la tige côté décharge et avec une partie de raccordement (8 ; 32 ; 4) reliée à la tige (4 ; 21 ; 34), et dans lequel sur la partie de raccordement est monté un enroulement enveloppant (11 ; 19 ; 23 ; 29 ; 39), caractérisé en ce que la distance entre le filament (5 ; 18 ; 22 ; 35) et l'enroulement (11 ; 19 ; 23 ; 29 ; 39) est fixé en reliant le filament (5 ; 18 ; 22 ; 35) et l'enroulement (11 ; 19 ; 23 ; 29 ; 39) ensemble
    - soit par le biais d'une pièce d'écartement droite (41) qui est mise en place par des points de soudure (42) entre le filament (22) et l'enroulement (23),
    - soit par le biais d'une interruption d'enroulement (12 ; 24 ; 36 ; 40) enroulée en forme d'hélice autour de la tige (4 ; 21 ; 34), qui comprend une ou plusieurs spires avec un pas plus grand que le filament (5 ; 18 ; 22 ; 35).
  2. Système d'électrode selon la revendication 1, caractérisé en ce que la tige (4 ; 21 ; 34) présente un diamètre constant tout du long.
  3. Système d'électrode selon la revendication 1, caractérisé en ce que le diamètre de la partie de raccordement (8 ; 32 ; 4) représente de 50 % à 400 % du diamètre de la tige (4 ; 21 ; 34).
  4. Système d'électrode selon la revendication 1, caractérisé en ce que la partie de raccordement (8 ; 32 ; 4) est reliée intégralement avec la tige (4 ; 21 ; 34).
  5. Système d'électrode selon la revendication 1, caractérisé en ce que le filament (5 ; 18 ; 22 ; 35) et l'enroulement (11 ; 19 ; 23 ; 29) ainsi que l'interruption d'enroulement (12 ; 24 ; 36 ; 40) sont réalisés d'un seul tenant à partir d'un fil.
  6. Système d'électrode selon la revendication 1, caractérisé en ce que la partie de raccordement (8 ; 32 ; 4) est une partie séparée.
  7. Système d'électrode selon la revendication 1, caractérisé en ce que la partie de raccordement (8 ; 32 ; 4) est un prolongement intégré de la tige (4 ; 21 ; 34).
  8. Système d'électrode selon la revendication 6, caractérisé en ce qu'au moins la tige (4 ; 21 ; 34) est composée d'un matériau électriquement conducteur ayant un point de fusion élevé, de préférence en tungstène ou en tantale seuls ou majoritairement en tungstène ou en tantale.
  9. Système d'électrode selon la revendication 6, caractérisé en ce que la partie de raccordement (8 ; 32 ; 4) est composée uniquement de l'un des matériaux molybdène, niobium, cermet électriquement conducteur ou majoritairement de l'un de ces matériaux ou d'un alliage de Mo ou de Nb.
  10. Système d'électrode selon la revendication 1, caractérisé en ce que le filament (5 ; 18 ; 22 ; 35) et l'enroulement (11 ; 19 ; 23 ; 29 ; 39) sont composés du même matériau.
  11. Système d'électrode selon la revendication 1, caractérisé en ce que le filament (5 ; 18 ; 22 ; 35) et l'enroulement (11 ; 19 ; 23 ; 29 ; 39) sont composés de molybdène et/ou de tungstène.
  12. Système d'électrode selon la revendication 1, caractérisé en ce que le filament (5 ; 18 ; 22 ; 35) et l'enroulement (11 ; 19 ; 23 ; 29 ; 39) possèdent le même pas.
  13. Système d'électrode selon la revendication 1, caractérisé en ce que le système d'électrode comprend une pièce frontale (20), dans laquelle le filament et l'enroulement sont symétriques l'un par rapport à l'autre, le filament (22) et l'enroulement (23) possédant la même longueur.
  14. Système d'électrode selon la revendication 1, caractérisé en ce que sur l'enroulement (11 ; 23) ou une partie de celui-ci est monté au moins un autre enroulement (26) ou un guipage.
  15. Système d'électrode selon la revendication 1, caractérisé en ce que la partie de raccordement (8 ; 32 ; 4) a pour l'essentiel le même diamètre que la tige (4 ; 21 ; 34), de sorte que leurs diamètres diffèrent l'un de l'autre de moins de 30%.
  16. Système d'électrode selon l'une des revendications précédentes, caractérisé en ce que le diamètre de l'interruption d'enroulement (12 ; 24 ; 36 ; 40) est réduit localement.
  17. Système d'électrode selon la revendication 1, caractérisé en ce que l'enroulement ((11 ; 19 ; 23 ; 29)) présente à l'extrémité éloignée de la décharge un diamètre externe réduit.
  18. Lampe à décharge de gaz haute pression comportant au moins un système d'électrode (13 ; 30) selon la revendication 1, dans laquelle la lampe présente une enceinte de décharge (2) avec deux extrémités (7), dans laquelle un tel système d'électrode (13 ; 30) est monté dans l'une ou dans les deux de ces extrémités (7) de l'enceinte de décharge, dans laquelle l'enceinte de décharge (2) est réalisée en céramique.
EP04802774A 2004-02-23 2004-11-19 Systeme d'electrodes pour lampe a decharge gazeuse haute pression Expired - Lifetime EP1730766B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102004008746 2004-02-23
DE102004012242A DE102004012242A1 (de) 2004-02-23 2004-03-12 Elektrodensystem für eine Hochdruckentladungslampe
PCT/DE2004/002561 WO2005083744A2 (fr) 2004-02-23 2004-11-19 Systeme d'electrodes pour lampe a decharge gazeuse haute pression

Publications (2)

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EP1730766A2 EP1730766A2 (fr) 2006-12-13
EP1730766B1 true EP1730766B1 (fr) 2013-03-27

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US (1) US20050264213A1 (fr)
EP (1) EP1730766B1 (fr)
JP (1) JP4587078B2 (fr)
KR (1) KR20060131868A (fr)
CA (1) CA2497511A1 (fr)
RU (1) RU2006133920A (fr)
WO (1) WO2005083744A2 (fr)

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US20070241654A1 (en) * 2005-03-22 2007-10-18 Robert Cassidy Lamp filament design
US7615929B2 (en) * 2005-06-30 2009-11-10 General Electric Company Ceramic lamps and methods of making same
US20070035249A1 (en) * 2005-08-10 2007-02-15 Geza Cseh Lamp with inner capsule
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CA2497511A1 (fr) 2005-08-23
KR20060131868A (ko) 2006-12-20
EP1730766A2 (fr) 2006-12-13
RU2006133920A (ru) 2008-03-27
JP4587078B2 (ja) 2010-11-24
WO2005083744A3 (fr) 2006-02-16
JP2007522640A (ja) 2007-08-09
US20050264213A1 (en) 2005-12-01
WO2005083744A2 (fr) 2005-09-09

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