Fire door system
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United States of America Patent
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-
Feb 25, 1997
Grant Date -
N/A
app pub date -
Oct 21, 1994
filing date -
Oct 21, 1994
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A fire door system comprising first and second fire door assemblies each assembly including a fire door, a temperature sensing device and an operator. The operators of each of the assemblies are electrically interconnected such that when the fire doors simultaneously close when either (a) the temperature sensing device senses that the ambient temperature exceeds a predetermined value or (b) the circuit between the operators of the assemblies is deactivated.
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