Abstract: An element basket assembly (30) for a rotary regenerative heat exchanger (2) is comprised of a plurality of heat transfer element plates (32) stacked in an array within a supporting basket frame formed of upper and lower plank-like shell members (34,44) each formed into a trough-like member having a base end (342,442) and a pair of spaced outwardly extending legs (344,444). The shell members (34,44) are interconnected at their base ends by corner angle bars (35) and at the outward ends of their legs by closure member (36) to form a four-sided frame housing. Retaining grates (42a,42b) are mounted within the trough-like shell members (34,44) so as to extend across the upper and lower end surfaces of the stacked element plates (32) for retaining the element plates within the housing.

Abstract: A plurality of steerable beam feed devices are used in combination with a single stationary toroidal antenna which permits simultaneous communication with several geosynchronous satellites. Each feed device is movably mounted on a flat elevation plate having linear bearings which mate with rails on a flat azimuth plate to allow the feed to be positioned vertically or at some angle with respect to the vertical depending upon the orientation of the antenna. The flat azimuth plate is mounted for movement on two curved rails which follow the focal arc of the toroidal antenna. Linear actuator devices are provided for moving each plate within a limited range to provide fine positioning of the feed relative to the antenna.