Sprinkler arrangement for document storage

摘要

In the typical embodiments described in the specification, a sprinkler arrangement for protecting stored documents has a sprinkler body with an orifice providing a K factor in the range from about 1.1 to about 2.7, a pair of frame arms terminating in a boss from which a glass bulb supports a cap in position to seal the orifice in the passage, and a pair of closely spaced substantially planar deflector members having a peripheral edge spacing in a range from about 0.01 inch to about 0.60 inch. The deflector member closer to the axial passage has a plurality of slots permitting some water to pass into the space between the deflector members where it generates a very fine droplet mist and some water to be distributed outwardly in the form of fine droplets to carry the mist away from the sprinkler. A recess formed in the surface of the second deflector member facing the first deflector member provides a cavity which promotes atomization and generates turbulence.