发明名称 ROOKMELDER.
摘要 An optical smoke detector comprising a radiation source which transmits radiation into a predetermined spatial region and a radiation receiver to which there is delivered the radiation which is scattered by particles located along the radiation path. The radiation source possesses a substantially conical ring-shaped radiation characteristic or pattern and the radiation receiver is arranged substantially at or along the cone axis.
申请公布号 NL7702835(A) 申请公布日期 1977.10.04
申请号 NL19770002835 申请日期 1977.03.16
申请人 CERBERUS AG TE MAENNEDORF, ZWITSERLAND. 发明人
分类号 G01N21/53;G08B17/107 主分类号 G01N21/53
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