Compact control and monitoring switch
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United States of America Patent
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Sep 3, 1996
Grant Date -
N/A
app pub date -
Nov 1, 1994
filing date -
Nov 1, 1994
priority date (Note) -
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status (Latency Note)
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Abstract
A device for control and monitoring of pressure in a system combines a conventional three pole pressure switch with the following additional features: (1) a lock mechanism with three influencing input factors and a single resulting output contact action, (2) a three pole thermal release device as one of the input factors, and (3) a remote control tripping device as another input factor, all integrated into a single, compact, modular unit. The thermal release device comprises a plurality of bimetals which sense electrical flow passing through the device, and which are mechanically connected to a locking mechanism to shut off current if the electrical flow reaches a predetermined maximum. If any of the three inputs activates the locking mechanism, the device must be reset by an operator.
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