Abstract: A cradle has upper and lower surfaces, a periphery and opposed first and second ends. A closed projection extends upwardly from the first end with spaced parallel faces and co-axial bores. Laterally spaced open projections extend upwardly from the second end. Each open projection has a free exterior with a recess extending inwardly. A draw latch fabricated of an elastomer has a handle and a major portion. The major portion has a fixed end positioned between the parallel faces of the closed projection. The fixed end has a central bore. A pivot pin extends through the central and co-axial bores. The major portion has a movable end with an enlargement. The draw latch is adapted to be unstretched whereby the enlargement is located between the recesses.

Abstract: A wide angle lenticular lens system for a single piece rear projection screen including a plurality of substantially identical parallel and vertical lenticular lenses. Each of the plurality of lenticular lenses is substantially a single element lens and the shape of each of the plurality of lenticular lenses is substantially defined by a hyperbolic function.

Abstract: A rear projection screen consists of a Fresnel lens and a picture-forming screen placed in front of it. The picture-forming screen has vertical backward convex lenses on its back and vertical masking strips on its front and strip-shaped sections situated between the masking strips and opposite the backward convex lenses. Each of these is designed to refract light rays coming from behind so that they are directed towards the strip-shaped sections. In order to increase the picture resolution or definition capability of the screen and to avoid notch sensitivity between the backward convex lenses an intermediate lens is provided between every two of the backward convex lenses.