Chemical smoke or pollutant detector
First Claim
1. A system for providing an alarm function in the presence of smoke or pollutants comprising:
- a sensor havingfirst and second conductors in non-electrical contact,a coating material interspersed between and among said first and second conductors, said coating material chemically reacting with by-products of combustion or pollutants to affect conductivity between said first and second conductors;
power supply means for supplying power to said first and said second conductors;
detector means connected to said first and second conductors for providing an output signal upon the presence of smoke; and
,alarm means responsive to said output signal for providing an alarm indication.
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Accused Products
Abstract
A smoke or pollutant sensor has first and second conductors in non-electrical contact and a coating, between the first and second conductors, which chemically reacts with by-products of combustion to allow electrical conduction between the first and second conductors. A heating and cooling mechanism may be provided to condense the smoke onto the sensor during the cooling cycle and to aid the chemical reaction and the evaporation of any condensed water during the heating cycle. Third and fourth conductors may be provided without the coating material, and the first, second, third and fourth conductors may be connected to a detector for detecting changes in conductivity in the presence of smoke to provide an alarm function, the third and fourth conductors acting as a reference sensor to compensate for changes in humidity and atmospheric pressure.
13 Citations
23 Claims
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1. A system for providing an alarm function in the presence of smoke or pollutants comprising:
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a sensor having first and second conductors in non-electrical contact, a coating material interspersed between and among said first and second conductors, said coating material chemically reacting with by-products of combustion or pollutants to affect conductivity between said first and second conductors; power supply means for supplying power to said first and said second conductors; detector means connected to said first and second conductors for providing an output signal upon the presence of smoke; and
,alarm means responsive to said output signal for providing an alarm indication. - View Dependent Claims (2, 3, 4)
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5. A sensor for chemically sensing smoke or pollutants comprising:
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first and second conductors in non-electrical contact, said first and second conductors adapted to be connected to a source of power; and
,a coating material interspersed between and among said first and second conductors, said coating material chemically reacting with byproducts of combustion to affect conductivity between said first and second conductors. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification