Abstract: A lightweight constructional element (100) is disclosed. The lightweight constructional element (100) comprises: (a) a shell-shaped basic body or shell (1), e.g., fabricated from metal, having interior (20) and exterior (23) surfaces, the interior surfaces (23) of the basic body define an interior space (26); and (b) reinforcing ribs (2a, 2b) of plastics material, preferably thermoplastic material, which are fixedly attached to the exterior surface (23) of basic body (1). The reinforcing ribs are fixedly attached to the exterior surface of said basic body by means of discrete attachment points {which may include, for example, apertures (3a), slots (3f), beads (3b) and/or protrusions (3c)}. Articles of manufacture that may include the lightweight constructional element include, for example, structural components of motor vehicles (e.g., a cross car beam) and aircraft, and a structural component having a channel for receiving at least one of a cable and a gas.

Abstract: An apparatus for utilising solar energy is described. The apparatus comprises: (a) a plurality of movable mirrors (3) which are arranged in parallel next to one another, are orientable according to the solar altitude, and are fastened on carriers (10, 10′); (b) at least one stationary collector (14) for absorbing the radiation reflected by the mirrors (3); (c) a drive means for rotating the mirrors (3) and carriers (10, 10′) in order to orientate the mirrors (3) in such a way that the solar radiation impinging on the mirrors is reflected onto the collector (14); and (d) a framework (15) supporting said mirrors (3), said carriers (10, 10′), said stationary collector (14) and said drive means (c).

Abstract: An apparatus for utilising solar energy is described.