Monitoring system for cyclically operating machines
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United States of America Patent
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Jan 19, 1993
Grant Date -
N/A
app pub date -
May 31, 1991
filing date -
May 31, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Monitoring systems for cyclically operating machines having a cylinder including sensor to be mounted on the exterior of said cylinder for detecting both force in said cylinder and structure-borne signals in the cylinder; and having a computer for storing pre-recorded force and structure-borne noise signal as a function of time in a cycle and for comparing said detected and pre-recorded force and structure-borne noise signals to determine the status of said machine. The sensor has the form of a thin disk fitted between a cylinder cover and a nut of a cylinder cover stud under preload, thus replacing the standard washer.
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