Thermally responsive frangible bulb

Fire extinguishers – Sprinkler heads

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Details

169 38, 169 42, 169 56, 169 57, 169 58, A62C 3700, A62C 3712, A62C 3714

Patent

active

059672382

ABSTRACT:
A thermally responsive frangible bulb containing a liquid which when heated expands to burst the bulb. In use the bulb may be positioned between a support and a sprinkler outlet cap such that when the bulb bursts the sprinkler outlet is opened. The bulb is at least partially filled with at least one halogen derivative of an aromatic hydrocarbon containing two or more halogen substituents such as 1,3-dichlorobenzene, or an aliphatic amide such a formamide. Use of these liquids enables a wide range of operating temperatures and a quick response operating time to be achieved.

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