发明授权
US06208070B1 Metal vapor discharged lamp with specific angle between electrodes and tapered envelope wall
有权
金属蒸气放电灯与电极和锥形封壁之间具有特定的角度
- 专利标题： Metal vapor discharged lamp with specific angle between electrodes and tapered envelope wall
- 专利标题（中）： 金属蒸气放电灯与电极和锥形封壁之间具有特定的角度
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申请号： US09218480申请日： 1998-12-22
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公开(公告)号： US06208070B1公开(公告)日： 2001-03-27
- 发明人: Kouichi Sugimoto , Hiroshi Nohara , Yoshiharu Nishiura , Kazuo Takeda , Shiki Nakayama , Takashi Yamamoto
- 申请人： Kouichi Sugimoto , Hiroshi Nohara , Yoshiharu Nishiura , Kazuo Takeda , Shiki Nakayama , Takashi Yamamoto
- 优先权： JP9-360826 19971226
- 主分类号： H01J162
- IPC分类号： H01J162
摘要：
A metal vapor discharge lamp comprises a discharge tube having a ceramic container into which a pair of electrodes and a discharge metal compound are sealed. The container comprises a first cylindrical portion, tapered portions, second cylindrical portions and third cylindrical portions. The third cylindrical portions are shrinkage-fitted to the second cylindrical portions. The electrodes are attached to the third cylindrical portion with a sealing member. An inner wall of the third cylindrical portions and the electrodes define a gap. The inner surface of the tapered portions and a central axis of the electrodes define an angle of 40°-80°. Thus, a metal vapor discharge lamp is provided whose discharge tube does not include disks among its parts, and which can maintain, over a long period of operation, good operating characteristics that depend only little on the lamp orientation.
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