Labyrinthine light-scattering-type smoke detector

Details Labyrinthine light-scattering-type smoke detector Labyrinthine light-scattering-type smoke detector

G - Physics

08

B

340/140.1

G08B 17/10 (2006.01) G08B 17/107 (2006.01)

Patent

CA 1256530

ABSTRACT OF THE DISCLOSURE 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.

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