Intrusion detection system for operating industrial machines with variable sensitivity
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United States of America Patent
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Apr 4, 1989
Issued Date -
N/A
app pub date -
Nov 10, 1987
filing date -
Jan 13, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An optical detection system of the sort adapted to enable and/or disable the operation of an associated industrial machine when an appropriate intrusion is detected. The optical intrusion detection system is adapted to have a variable sensitivity, whereby it can be set to respond to the intrusion of an object of a first size during one phase of operation of said machine and to an object of a second size during another phase of the operation of said machine.
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