发明授权
- 专利标题: Moisture indicator
- 专利标题(中): 湿度指示器
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申请号: US689372申请日: 1976-05-24
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公开(公告)号: US4018061A公开(公告)日: 1977-04-19
- 发明人: Victor A. Williamitis
- 申请人: Victor A. Williamitis
- 申请人地址: MI Detroit
- 专利权人: General Motors Corporation
- 当前专利权人: General Motors Corporation
- 当前专利权人地址: MI Detroit
- 主分类号: F25B41/00
- IPC分类号: F25B41/00 ; F25B43/00 ; F25B49/00
摘要:
A moisture indicator particularly adapted for use in a refrigerant system to indicate by visual inspection the moisture content of refrigerant therein. A preferred embodiment of the indicator comprises a hygroscopic plastic sleeve which is mounted behind a sight glass within a housing such as a receiver. The whole sleeve can be impregnated with a cobalt salt whose color changes when exposed to water. In use, the color of the indicator may be visually compared with a reference color stripe which does not change color with the addition of moisture and which is preferably applied adjacent the cobalt salt. The sleeve can also be non-hygroscopic plastic, or even metal, coated with a thin film of hygroscopic plastic containing cobalt salts.
公开/授权文献
- US5138628A Power laser with active mirror 公开/授权日:1992-08-11