Fire and explosion detection apparatus
First Claim
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1. Fire and explosion detection apparatus comprising:
- a first detector for sensing radiation within a first frequency range excluding radiation in the visible spectrum and providing a first output indication in response to receipt of such radiation;
a second detector for sensing radiation within a second frequency range excluding radiation in the visible spectrum and providing a second output indication in response to receipt of such radiation; and
logic means for ANDing said first and second output indications and providing a third output indication of simultaneous receipt of radiation within said first and second frequency ranges.
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Abstract
Fire and explosion detection apparatus comprises an ultra violet detector providing a first output signal in response to receipt of ultra violet radiation and an infra red detector providing a second output signal in response to receipt of infra red radiation. A logical AND circuit, in response to simultaneously occurring first and second output signals, provides a third output signal indicative of simultaneous receipt of ultra violet and infra red radiation.
13 Citations
5 Claims
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1. Fire and explosion detection apparatus comprising:
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a first detector for sensing radiation within a first frequency range excluding radiation in the visible spectrum and providing a first output indication in response to receipt of such radiation; a second detector for sensing radiation within a second frequency range excluding radiation in the visible spectrum and providing a second output indication in response to receipt of such radiation; and logic means for ANDing said first and second output indications and providing a third output indication of simultaneous receipt of radiation within said first and second frequency ranges. - View Dependent Claims (2, 3, 4, 5)
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Specification
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Current AssigneeSpectronix Ltd. (Emerson Electric Company)
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Original AssigneeSpectronix Ltd. (Emerson Electric Company)
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InventorsSpector, Yechiel, Spector, Dov
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Primary Examiner(s)Smith, Alfred E.
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Assistant Examiner(s)Howell, Janice A.
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Application NumberUS05/902,609Time in Patent Office720 DaysField of Search250/338, 250/339, 250/342, 250/349, 250/372, 324/72US Class Current250/339.05CPC Class CodesG08B 17/12 Actuation by presence of ra...
