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1. IN8848/CHENP/2011 - “IMPROVEMENTS TO PARTICLE DETECTORS”

Office India
Application Number 8848/CHENP/2011
Application Date 30.11.2011
Publication Number 8848/CHENP/2011
Publication Date 17.05.2013
Publication Kind A
IPC
G PHYSICS
08
SIGNALLING
B
SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
17
Fire alarms; Alarms responsive to explosion
10
Actuation by presence of smoke or gases
103
using a light emitting and receiving device
107
for detecting light-scattering due to smoke
G08B 17/107
Applicants XTRALIS TECHNOLOGIES LTD
Inventors Ron KNOX
Karl BOETTGER
AJAY  Kemal
Title
(EN) “IMPROVEMENTS TO PARTICLE DETECTORS”
Abstract
(EN)
A beam detector (10) including a light source (32)  a receiver (34)  and a target (36)  acting in co-operation to detect particles in a monitored area (38). The target (36)  reflects incident light (40)  resulting in reflected light (32) being returned to receiver (34). The receiver (34) is a receiver is capable of recording and reporting light intensity at a plurality of points across its field of view. In the preferred form the detector (10) emits a first light beam (3614) in a first wavelength band; a second light beam (3618) in a second wavelength band; and a third light beam (3616) in a third wavelength band  wherein the first and second wavelengths bands are substantially equal and are different to the third wavelength band.