Apparatus and method for water flow fire alarm
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United States of America Patent
Stats
-
Dec 25, 2001
Issued Date -
N/A
app pub date -
Nov 30, 1999
filing date -
Jun 17, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus and method 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. An integral system incorporating all of the elements discussed provides multiple levels of security for a fire protection system for use in a residence or other structure.
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