Abstract: The present invention is a GPS system for navigation and attitude determination, comprising a sensor array including a convex hemispherical mounting structure having a plurality of mounting surfaces, and a plurality of antennas mounted to the mounting surfaces for receiving signals from space vehicles of a GPS constellation. The present invention also includes a receiver for collecting the signals and making navigation and attitude determinations. In an alternate embodiment the present invention may include two opposing convex hemispherical mounting structures, each of the mounting structures having a plurality of mounting surfaces, and a plurality of antennas mounted to the mounting surfaces.

Abstract: For use in a modular cabinet or the like system wherein one or more cabinet modules of unit width have rolling mobility along parallel rails which extend normal to the module-width dimension and at module-width spacing, the invention contemplates a floor-mountable track system of rigid interconnected modular rail and spacer members adapted to provide permanent guided support of one or more modules without anchorage to the supporting floor, whereby the system can be readily moved, rearranged, expanded or otherwise modified, without damage to or modification of the supporting floor. The invention also contemplates novel modular rollable base structure particularly applicable to the tiered support of cabinet modules on such a track system.

Abstract: A file cabinet construction includes at least one shelf mounted within a housing having parellel opposed side walls and a rear wall. A number of guide rails are mounted at predetermined positions along the shelf so that they are parallel to the side walls of the housing. Each guide rail has a longitudinal slot extending into the guide rail from the end located nearest to the rear wall of the housing and terminating at a point adjacent to the forward edge of the shelf. A boxlike container which includes opposed parallel longitudinal sides and a bottom having a longitudinal channel is detachably mounted on each guide by a floating pin. The floating pin is mounted so that the longitudinal axis of the pin is transverse to the channel in the bottom of each container.