Shut down apparatus and method for use with electro-pneumatic controllers
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United States of America Patent
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Issued Date -
May 26, 2005
app pub date -
Nov 25, 2003
filing date -
Nov 25, 2003
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A shut down unit for use with an electro-pneumatic controller includes an electronic switch configured to receive to a first signal from a control unit of the electro-pneumatic controller and to convey the first signal to an electro-pneumatic transducer of the electro-pneumatic controller. The electronic switch is further configured to receive a second signal associated with a control signal input and to cause the electronic switch to prevent the conveyance of the first signal to the electro-pneumatic transducer.
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