| 发明名称 |
ATTENUATION TYPE SMOKE DETECTOR |
| 摘要 |
PURPOSE:To achieve the improvement in light emission efficiency and reduce the rate of occurrence of false alarm as far as possible despite the presence of foreign materials other than smoke by opposedly providing two parabolic face mirrors and disposing a light emitting device and photo detector in respective focal positions. |
| 申请公布号 |
JPS5280881(A) |
申请公布日期 |
1977.07.06 |
| 申请号 |
JP19750156098 |
申请日期 |
1975.12.27 |
| 申请人 |
MATSUSHITA ELECTRIC WORKS LTD |
发明人 |
MORISUE KAZUNARI;KAHARA TOORU;MATSUMOTO SHIGERU;KATAZUKI KUNIHARU |
| 分类号 |
G01N21/59;G01N21/53;G08B17/10;G08B17/103 |
主分类号 |
G01N21/59 |
| 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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