Abstract: An ion projection head designed to provide a fairly uniform cloud of ions over a wide area for use in therapeutic and industrial applications, among others. The head, although being relatively small, generates a large ion cloud in a very efficient manner. A point electrode is located in a cup having a spherical internal surface of curvature. This cup causes the ions to move in a relatively common direction. An iris plate over the mouth of the cup causes the ions generated in the cup to be propelled away from the iris plate.
Abstract: A filter cassette is disclosed, for use in an air filtering system, which has a central supporting frame, inside of which an electrostatic filtering device is mounted, and on each side of which are carrier flanges adapted to receive separate removable filtering elements. The entire filtering cassette is designed to be removed from the air filtering system for servicing; and the filtering elements supported by the carrier flanges may be varied in different installations to suit the specific filtering needs.
Abstract: A blower is mounted in an enclosure; having a first opening covered by a filter media and a second opening; in such a way that the rotating axis of its blower wheel, or rotor, is: (a) located at or near the vertical midway point between the top and bottom of the enclosure, or duct, in which the blower is mounted, and (b) angularly displaced from the usual horizontal orientation (i.e., horizontal axis of rotation of the blower) by a substantial angle, preferably 15.degree. to 75.degree..