G - Physics – 08 – B
Patent
G - Physics
08
B
340/140.1
G08B 17/10 (2006.01)
Patent
CA 1118869
35-EL 1386 ABSTRACT OF THE DISCLOSURE A smoke detector is disclosed using a dark field optical system in which an air sample is illuminated and forward scattered light is collected in a zone centered about but exclusing on-axis light. The collected light is then sensed to detect the presence of smoke. The system includes a self-contained light source and a photo detector suitable for operation by a dry cell. The optics are designed for high light gathering efficiency and the internal design minimizes scattered light to achieve maximum smoke detection sensitivity.
304606
Company General Electric
Eckersley Raymond A.
LandOfFree
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