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 reduce dispersion and evaporation of electrode substance and prolong the life of a lamp by using the nonfusible metal having getter action at least for one of the outside coil and the inside coil of an electrode, suppressing formation of impure gas. CONSTITUTION:The electrode of a high pressure sodium lamp is so constituted that the coil 9 consisting of a nonfusible metal wire having getter action such as tantaium is closely wound in 2-4 turns on the introducing side of the electrode core rod 8 made of tungsten or thorium tungsten, and a space is formed between the electrode core rod 8 and the outside coil 9 by winding the wire, keeping a fixed distance from the electrode core rod 8 at the center part. Into the space formed between the inner surface of the outside coil 9 and the electrode core rod 8, the treble inside coil 10 which consists of the nonfusible thin metal wire having getter action such as tantalum having electron radiation substance adhered.，下面是High pressure sodium lamp专利的具体信息内容。
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