Abstract: A shroud, including a shield placed on either side of an evaporation pad, increases the length of travel air transit time within the pad. Pressurized water, emitted in jets from a plurality of orifices spaced along a manifold, is directed against a diffuser for dissipation and dissemination to the upper edge of the pad. The pad is wetted intermittently as the result of a timer controlling distribution of the water. An auxiliary reservoir, in combination with relocatable pump, inlet valve and pad frames, provide for alternate downdraft as side draft operation.

Abstract: A shroud, including a shield placed on either side of an evaporation pad, increases the length of travel air transit time within the pad. Pressurized water, emitted in jets from a plurality of orifices spaced along a manifold, is directed against a diffuser for dissipation and dissemination to the upper edge of the pad. The pad is wetted intermittently as the result of a timer controlling distribution of the water. An auxiliary reservoir, in combination with relocatable pump, inlet valve and pad frames, provide for alternate downdraft as side draft operation.

Abstract: A shroud, including a shield placed on either side of an evaporation pad, increases the length of travel air transit time within the pad. Pressurized water, emitted in jets from a plurality of orifices spaced along a manifold, is directed against a diffuser for dissipation and dissemination to the upper edge of the pad. The pad is wetted intermittently as the result of a timer controlling distribution of the water. An auxiliary reservoir, in combination with relocatable pump, inlet valve and pad frames, provide for alternate downdraft as side draft operation. An elongate, arcuate baffle downstream of the evaporative pad alters the direction of the air stream to flow in a substantially opposite direction.

Abstract: This electromagnetic coil is composed of concentric multi-turn windings in magnetic aiding relationship, one winding being formed of copper wire and the other of wire made of copper contaminated with a minor percentage of a metal having a different coefficient of resistance than copper. The wires of both windings having a positive temperature coefficient of resistance, one being less than the other so that the power demands of the coil at low temperatures will be reduced with a minimum loss in hot ampere turns. The wire of copper contaminated with the other metal is of a smaller gage size and the thickness of the winding of such wire bears a predetermined ratio to the total of both windings whereby they will have substantially equal heat densities.