发明名称 |
Photoelectric smoke detector with improved testing means |
摘要 |
An improved smoke detector incorporating means for verifying the detector's smoke sensitivity limits, such verification means including means for positively positioning various light reflecting surfaces to provide predetermined light reflection onto light sensing means to create simulated smoke levels.
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申请公布号 |
US5170150(A) |
申请公布日期 |
1992.12.08 |
申请号 |
US19910646169 |
申请日期 |
1991.01.25 |
申请人 |
GENTEX CORPORATION |
发明人 |
AUSTIN, GREGORY J.;INGRASSIA, GAETANO |
分类号 |
G08B29/14;G08B29/20 |
主分类号 |
G08B29/14 |
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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