Apparatus for water flow measurement
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United States of America Patent
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-
May 29, 2001
Grant Date -
N/A
app pub date -
Jan 18, 2000
filing date -
Jun 17, 1998
priority date (Note) -
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status (Latency Note)
Importance
Abstract
An apparatus for a flow-based fire alarm. A bypass system is provided to allow sufficient water flow where a pressure drop, particularly in a residential or multi-purpose piping system such as a water softener is encountered, by providing an alternate, lower pressure flow path allowing additional flow when the pressure drop through the system becomes too great. Flow detection means are also provided with minimal pressure drop to insure that flow for fire protection need is not unduly restricted. The flow detection means includes either a differential pressure switch coupled to an orifice plate or a moving orifice plate having thereon a magnet, which communicates with a Reed switch in proportion to the flow therethrough.
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Cited Art Landscape
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