发明授权
- 专利标题： High pressure sodium discharge lamp having gas filled outer envelope
- 专利标题（中）： 高压钠放电灯具有充气外壳
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申请号： US414640申请日： 1989-09-28
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公开(公告)号： US4977346A公开(公告)日： 1990-12-11
- 发明人: Ray G. Gibson , Joseph Droho
- 申请人： Ray G. Gibson , Joseph Droho
- 申请人地址： NY New York
- 专利权人： North American Philips Corp.
- 当前专利权人： North American Philips Corp.
- 当前专利权人地址： NY New York
- 主分类号： H01J5/50
- IPC分类号： H01J5/50 ; H01J61/82
摘要：
A discharge lamp comprises an HPS discharge device within an outer envelope filled with inert gas. A normally nonconductive spark gap device within the outer envelope is connected across conductors used to apply a voltage to the HPS discharge device. The spark gap breaks down when the applied voltage exceeds a certain value to prevent breakdown through the inert gas within the outer envelope.
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