Abstract:
A component for automatic sprinkler systems employed for fire protection is provided which is useful in dry-pipe systems to cause rapid opening of the dry-pipe valve of such systems in response to a slight but rapid decrease of air pressure in the sprinkler piping network attendant upon opening of a sprinkler head. Slow decreases in such pressure in relation to atmospheric pressure are offset by an atmospheric bleed valve, a readily accessible adjustment for altering and visibly indicating the trip-off pressure is provided, and provision is made for either electrical or pneumatic operation.
Abstract:
A discharge valve for each of a plurality of manifold connected containers for fire extinguishing fluid, the discharge valve including a main valve pressure seated by fluid in the container to which it is attached and openable by pressure in the valve outlet from the manifold. This action is achieved by use of a double faced two diameter piston integral with the main valve member. A combination filling and pilot valve is included so that each container may be separately filled while connected to the manifold. The pilot valve may be actuated to discharge one container to provide manifold pressure for discharge of the remaining cylinders.
Abstract:
A dry-type sprinkler for use in fire protection systems wherein fluid passage through the sprinkler is closed by a valve at the intake end until released by a heat responsive mechanism, characterized by a floating inner tube assembly which automatically compensates for dimensional changes in length of the inner tube with respect to the outer tube when subjected to ordinary thermal effects, and by which loads are isolated within the sprinkler head assembly which includes the heat responsive mechanism, and no loads are transmitted through the inner or outer tubes which might affect the sealing function of the valve.