Abstract: A safety steering column assembly for automobiles, arranged to shorten under the effect of a predetermined force exerted during an impact accident, includes a steering column with a safety sleeve forming a part of the column. The safety sleeve is a grid tube made up of wound laterally spaced grid strands. Each grid strand consists of a plurality of plastics material impregnated fiber strands. The grid strands are located outwardly from and are wound angularly of and around the steering column axis. Adjacent grid strands having the same angular orientation relative to the axis are spaced laterally apart. Further, the grid strands are disposed in crossing relationship.

Abstract: Mold bodies, for example, for the wings of rotary wing aircraft are formed y densifying a core of a hard foam material under such pressure and temperature conditions that later, when the core is placed into a mold together with the cover layer of a heat curable synthetic material, the core will expand again in response to heating the cover layer to its curing temperature. This expansion causes an intimate, complete bond between the core and the cover layer.