Abstract:
To provide a high pressure discharge lamp in which no fusing of the metal foil occurs even if the high pressure discharge lamp is switched on for a certain time a high pressure discharge lamp is provided having a discharge vessel comprised of a light emission part and sealing parts made of glass connected to opposite ends of said light emission part; metal foils buried in a respective one of said sealing parts; a pair of electrodes comprised of core rods and tip end parts, said tip end parts being arranged oppositely to each other in the light emission part; and said core rods being melted and fused together with a respective one of the metals foils; wherein cavities are formed which reach from a surface of a respective one of the metal foils to an interior of the core rod, and the glass constituting said sealing part has entered into said cavities.
Abstract:
The lamp uses a sealing system with a ceramic supporting element (17) having a short length LA together with a W—Nb leadthrough part (18, 19, 20) and a specially adapted glass solder (21), which is based on an Al2O3 rare earth oxide system. In this case, the W part is accommodated in the supporting part over a length LW of 1 mm, and the aspect ratio LW/DUW, formed from the length LW and the diameter DUW of the W part, is at least 10.
Abstract translation:该灯使用具有陶瓷支撑元件(17)的密封系统,该陶瓷支撑元件(17)与W-Nb引线部分(18,19,20)和特别适合的玻璃焊料(21)一起具有短长度LA,其基于Al 2 O 3 稀土氧化物体系。 在这种情况下,W部分被容纳在长度LW为1mm的支撑部分中,并且由W部分的长度LW和直径DUW形成的纵横比LW / DUW为至少10。
Abstract:
A compound body has a first body part (15) made of glass and a mechanical connection (20, 60) which is melted on the first body part (15) and contains aluminum.
Abstract:
A high-pressure discharge lamp may include a ceramic discharge vessel and a longitudinal axis, with electrodes respectively being led out from the discharge vessel by means of a feed-through via capillaries, wherein a tubular cermet part, which consists of individual layers of different composition layered axially in succession, is fitted on the capillary, each layer containing Mo and Al2O3, the proportion of Mo in the first layer facing toward the capillary being from 3 to 15 vol. % and in the last layer being from 85 to 97 vol. %, and a molybdenum cover cap, the cover cap being welded to the feed-through and the cover cap being connected to the cermet part by means of solder containing metal, and the connection between the capillary and the cermet part being established by means of high-melting glass solder or sinter-active Al2O3 powder.
Abstract translation:高压放电灯可以包括陶瓷放电容器和纵向轴线,电极分别通过毛细管通过馈通从放电容器引出,其中管状金属陶瓷部件由不同的不同层 组成分层的组合物被装配在毛细管上,每层含有Mo和Al 2 O 3,第一层中Mo朝向毛细管的比例为3至15体积%。 %,最后一层为85〜97体积%。 %和钼盖盖,盖帽焊接到馈通,并且盖帽通过含金属的焊料连接到金属陶瓷部分,并且毛细管和金属陶瓷部件之间的连接是借助于 高熔点玻璃焊料或烧结活性Al2O3粉末。
Abstract:
A vehicle discharge lamp is provided with an outer tube, an arc tube disposed within the outer tube, and a pair of electrodes disposed within the arc tube. The arc tube includes a light emitting portion, and a pair of pinch seal portions. Molybdenum foils are sealed in the respective pinch seal portions. Each of the electrodes includes a sealed portion sealed within the pinch seal portion, a projecting portion projecting into the light emitting portion, and a welding portion welded to the molybdenum foil. A concavo-convex part is formed on the sealed portion.
Abstract:
An electrode for an extra-high pressure discharge lamp, comprises large diameter portion which is symmetrical with respect to an axis of the electrode, a small diameter portion connected to the large diameter portion, wherein the large diameter portion is connected to the small diameter portion through an outer surface portion of the electrode, wherein a stripe lines like pattern portion, extending along an electrode axis direction, is formed on a portion to be brought in contact with glass of a lamp, and wherein unevenness is formed over an entire circumference of the electrode in a cross sectional view of the electrode taken along a direction perpendicular to the electrode axis direction.
Abstract:
This invention is about a CMH lamp arc tube seal construction where the feedthrough electrode contains a cermet in such a manner that the said cermet is either not exposed outside the ceramic capillary (which in most cases is polycrystalline alumina, PCA) or if it is exposed to the outside of the arc tube, the part that is exposed has no current carrying function. The invention provides safe ways of assembling the cermet so as to avoid breakage of the said cermet due to mechanical stresses in the electrical connections.
Abstract:
A discharge lamp of the short arc type having an arc tube, a hermetically sealed tube at each of opposite ends of the, a pair of electrodes which are located in the arc tube, electrode rods which support the electrodes, support parts which are each formed by part of one of the hermetically sealed tubes, optionally cylindrical retaining bodies which are each located within and welded to a respective one of the support parts and in which a respective one of the electrode rods time is held securely, and a trigger component which is located on an outer side surface of the support parts, the support parts of the respective hermetically sealed tube and/or the cylindrical retaining bodies are formed of a material that contains a metal or a metallic compound for increasing the dielectric constant. In this way, even with a great distance between the electrodes of the lamp and a high gas filling pressure, the operating properties of the lamp can be improved and it can be reliably operated at a low breakdown voltage.
Abstract:
In a halogen-metal vapor lamp having a ceramic housing (2) and a current lead-through conductor (3) arranged in the ceramic housing, the glazed part of the current lead-through conductor (3) is a niobium alloy doped with phosphorus, in particular with 50 ppm to 0.5 wt. % phosphorus. The glazed part of the current lead-through conductor (3) preferably has inside the ceramic vessel (2) a shielding (4) from halides, which is connected to a tungsten electrode. The glazed part of a current lead-through conductor (3) in the form of a pin having a length of 5 to 30 mm and a diameter of 0.2 to 2 mm is a niobium alloy doped with phosphorus. For the glazing of current lead-through conductors in a ceramic burner, a current lead-through conductor made of a niobium alloy temperature-stabilized with phosphorus is glazed. For the production of halogen-metal vapor lamps having a ceramic housing (2) and a current lead-through conductor (3) arranged in the ceramic housing (2), the current lead-through conductor (3) is exposed to heat treatments at temperatures of at least 1000° C. and there does not soften so much that it bends.
Abstract:
The invention relates to a high-pressure discharge lamp comprising a ceramic discharge vessel which encloses a discharge space, which is provided with an ionizable filling comprising one or more metal halides, in which a first and a second electrode are arranged, and which comprises a first and a second closing construction at respective sides of the discharge space, which closing constructions are connected to the discharge vessel and comprise a respective first and second current feed-through, at least the second feed-through comprising a capillary tube having a sintered bond to the second closing construction and an electrically conductive pin located within the capillary tube, leaving a crevice between the capillary tube and the pin, said pin and capillary tube being welded together at an end portion remote from the discharge space, wherein the capillary tube has an outer diameter of at most 1 mm, the crevice is at most 10 μm wide and the pin and the capillary tube consist of a metal chosen from Mo, Re, W, Ir, their alloys, optionally also comprising V and/or Ti. The invention further relates to an automotive lamp comprising the lamp of the invention.