High pressure sodium lamp
专利汇可以提供High pressure sodium lamp专利检索，专利查询，专利分析的服务。并且PURPOSE:To suppress dispersion and evaporation of electrode substance and prolong the life of a lamp by determining the weight of the inside substratum of an electrode within a prescribed range and increasing the rising speed of the electrode temperature in starting of the lamp. CONSTITUTION:The electrode of a high pressure sodium lamp is so constituted that the outside coil consisting of a tungsten wire is closely wound in 2-4 turns onto the part on the introducing body side of the electrode core rod 8 made of tungsten or thorium tungsten, and wound at the center part, keeping a fixed distance from the electrode core rod 8, thus forming the internal space between the electrode core rod 8 and the outside coil 9. In the said space, the inside substratum 10 having electron radiation substance adhered is accomodated. The electrode core rod 8 is drawn back from the top edge of the outside coil 9 by 0-7mm.. The weight of the inside substratum 10 is set into 2.1-10.4mg/mm. for the internal space formed between the inner surface of the outside coil 9 and the electrode core rod 8.，下面是High pressure sodium lamp专利的具体信息内容。
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