Object-sensor-based flow-control system employing fiber-optic signal transmission
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United States of America Patent
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Nov 16, 1999
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N/A
app pub date -
Jul 31, 1996
filing date -
Jul 31, 1996
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Abstract
A control circuit (56) for responding to infrared light from a target region and operating an electric valve (54) in response is disposed at a protected location remote from the target region. It detects the presence of objects by means of light conducted to it by a fiber-optic cable (32).
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