Alarm system having plural diverse detection means
First Claim
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1. A detection system for use in an area having controlled artificial lighting, comprising:
- smoke detector means having an altered electrical characteristic in the presence of smoke;
heat detector means having an altered electrical characteristic upon the ambient temperature exceeding a predetermined level;
infrared radiation detector means having altered electrical characteristics upon the presence of a predetermined level of infrared radiation;
alarm means electrically connected to said smoke detector, means, said heat detector means, and said infrared radiation detector means, said alarm means being responsive to each of said altered electrical characteristics of said smoke detector means, said heat detector, and said infrared radiation detector, whereby upon the occurrence of any of said altered electrical characteristics said alarm means produces an alarm signal; and
means electrically connected to said infrared radiation detector means being responsive to said altered electrical characteristics thereof for controlling the operation of the artificial lighting.
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Abstract
A system for detecting a fire emergency condition employs three separate and diverse sensors; a heat detector, a smoke detector, and an infrared radiation detector. Either or all of these detectors can activate the alarm. Additionally, the infrared radiation detector can be used to control the energization of the room'"'"'s artificial illumination means. All sensors are mounted in a common housing and a mirror or lens arrangement is provided to focus the infrared radiation upon the appropriate detector.
50 Citations
14 Claims
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1. A detection system for use in an area having controlled artificial lighting, comprising:
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smoke detector means having an altered electrical characteristic in the presence of smoke; heat detector means having an altered electrical characteristic upon the ambient temperature exceeding a predetermined level; infrared radiation detector means having altered electrical characteristics upon the presence of a predetermined level of infrared radiation; alarm means electrically connected to said smoke detector, means, said heat detector means, and said infrared radiation detector means, said alarm means being responsive to each of said altered electrical characteristics of said smoke detector means, said heat detector, and said infrared radiation detector, whereby upon the occurrence of any of said altered electrical characteristics said alarm means produces an alarm signal; and means electrically connected to said infrared radiation detector means being responsive to said altered electrical characteristics thereof for controlling the operation of the artificial lighting. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. Apparatus for use in a room having controlled artificial lighting, comprising:
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smoke detector means having altered electrical characteristics in the presence of smoke; heat detector means having altered electrical characteristics upon the ambient air exceeding a predetermined temperature; infrared radiation detection means having altered electrical characteristics dependent upon the level of infrared radiation incident thereon; discriminator means connected to said infrared radiation detector means for producing a first output signal upon the presence of a first altered electrical condition for producing a first output signal upon the occurrence of a first altered electrical characteristic indicating the presence of a person and for producing a second output signal upon the occurrence of a second altered electrical characteristic indicating the presence of a fire; alarm means connected to said smoke detector means, said heat detector means, and to said first output signal of said discriminator means and being responsive to said altered electrical characteristics of said smoke detector means and said heat detector means and to said first output signal from said discriminator means for producing an alarm; and artificial illumination control means connected to said second output signal of said discriminator means for controlling the energization or deenergization of the artificial illumination dependent upon the presence of said second output signal. - View Dependent Claims (11, 12, 13, 14)
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Specification