发明名称 |
Atmospheric seal for glow discharge analytical instrument |
摘要 |
This invention provides a gas atmosphere surrounding a seal between the face of a glow discharge lamp assembly and the sample surface to eliminate the possibility of the introduction of atmospheric gases into the glow discharge lamp. A groove concentric with the O-ring seal in the face of the glow discharge lamp is provided. This groove is supplied with gas slightly in excess of atmospheric pressure. This provides a gas blanket or jacket around the O-ring seal. Any leaks in the O-ring seal would draw the gas rather than atmospheric gases into the lamp. The incorporation of this modification is particularly important when a sample is being analyzed for elements which are also commonly present as atmospheric gases. The invention may be used on DC as well as RF glow discharge lamp assemblies.
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申请公布号 |
US5646726(A) |
申请公布日期 |
1997.07.08 |
申请号 |
US19950394697 |
申请日期 |
1995.02.24 |
申请人 |
LECO CORPORATION |
发明人 |
MITCHELL, JOEL C.;MARSHALL, KIM A. |
分类号 |
G01J3/10;G01N21/67;H01J61/36;(IPC1-7):G01J31/443;G01N21/66 |
主分类号 |
G01J3/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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