发明名称 |
A LIGHT-SCATTERING-TYPE SMOKE DETECTOR |
摘要 |
A light-scattering-type smoke detector having a projecting element and a light receiving element surrounded by a labyrinth is disclosed wherein the labyrinth comprises an array of a plurality of light shielding columns arranged in a circle each having a substantially J-shaped cross section, and the head portion of each column is inclined relative to the bisector of an angle formed between the lines connecting a first reflecting point with the projecting and light receiving elements, the light shielding columns having darkly colored light reflective surfaces. |
申请公布号 |
EP0213878(A3) |
申请公布日期 |
1987.10.28 |
申请号 |
EP19860306415 |
申请日期 |
1986.08.19 |
申请人 |
NOHMI BOSAI KOGYO CO., LTD. |
发明人 |
MOCHIZUKI, MIKIO NOHMI BOSAI KOGYO CO. LTD. |
分类号 |
G01N21/53;G08B17/10;G08B17/107 |
主分类号 |
G01N21/53 |
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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