Electronic slide valve position indicator
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United States of America Patent
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-
Nov 2, 1993
Grant Date -
N/A
app pub date -
May 19, 1992
filing date -
May 19, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A closed stainless steel tube is used to provide pressure and media isolation between the core and coils of a sensor in the form of a variable core transformer. The core is connected to and moved with a slide valve of a screw compressor and its actuating piston. The current output from the secondary coil is converted into a voltage, linearized and communicated to a microprocessor for controlling the position of the slide valve and thereby the loading of the compressor.
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