Abstract: A highway sign includes a reflective back surface and a biased lenticular lens front surface for reflecting light back in the direction of the original light source. The reflective back surface preferably comprises a plurality of corner cubic reflectors arranged in a regular matrix. The biased lenticular lens front surface comprises arcuate surfaces, or flat surfaces having arcuate indentations, separated by relatively flat surfaces which are substantially perpendicular to the plane of the reflective surface and which form a saw-toothed pattern when seen in profile. Printing can be applied to the lens surface to form traffic control messages or indicia. The biased lenticular front surface diffuses the oncoming light, thus providing a uniform reflective surface. The reflective surface and biased lenticular lens system can be formed from a single integrated sheet of polycarbonate plastic or similar material.

Abstract: A method for making a dark, adherent coating on exposed metal surfaces of a color-selection electrode assembly of a CRT includes the steps of applying a first solution of aqueous phosphoric acid to the metal surfaces of the assembly; contacting the metal surfaces with a second solution of selenium dioxide and methanol; rinsing the assembly; and then, applying a sealing solution to the surfaces of the assembly.

Abstract: A device for testing the adherence of a coating to a material includes a cone section and roller for bending the material around the cone section. The bent piece has a sharp bend at one end and a gradual bend at the other end. The proximity to the sharp bend at which flaking of the coating from the substrate occurs is a measure of the adherence of the coating to the material.

Abstract: A method of providing clean air to a workpiece comprises positioning the workpiece adjacent to a first opening in a conduit. The conduit includes a central segment and a peripheral segment having, respectively, the first opening and a second opening disposed at opposite ends of the conduit. The peripheral segment surrounds the central segment such that the first opening is substantially coplanar with the second opening. A laminar flow of air is created through the conduit in a direction away from the second opening and toward the first opening. The air flow is filtered through a HEPA filter supported within the conduit.

Abstract: An image display including a viewing screen comprising spaced elemental image areas and a light-absorbing matrix of partially-graphitized carbon black adjacent these areas. The matrix may be made by overcoating a stencil and stencil support with an aqueous slurry of the carbon black, drying the overcoating, and then removing the stencil and overlying overcoating.

Abstract: An apparatus for guided free fall impact testing of aerodynamically unstable disc shaped articles such as molded records. The apparatus has a vertical guide means which has guide rails and guide slides for correcting attitude deviations from the vertical of a disc shaped article as it free falls through the guide means. The apparatus also includes means for releaseably securing a disc shaped article at a preselected height. The apparatus also includes a contact plate for terminating the free fall of the disc shaped article and imparting the resulting impact force at a point on the outer diameter of the article.

Abstract: A composition providing effective electromagnetic/radio frequency interference (EMI/RFI) shielding is disclosed. The composition comprises a plastic material, preferably a thermoplastic resin, suitable additives such as lubricants, stabilizers and the like, and a conductive component consisting of a mixture of finely divided conductive carbon black and graphite.

Abstract: A method for obtaining a capacitive information disc record conductive molding composition having a desired melt viscosity wherein the conductive molding composition comprises carbon black and a plastic molding resin. The method comprises the steps of measuring the surface area of the carbon black particles; determining the relationship of the amount by weight of carbon black and the surface area of the carbon black particles to the melt viscosity of the conductive molding composition; and formulating the conductive molding composition by having carbon black present in an amount which is in accord with the relationship for the desired conductive molding composition melt viscosity.

Abstract: An apparatus for determining the gaseous surface area of a material. The apparatus incorporates, inter alia, a novel manifold structure that permits the testing of multiple samples of the material in quick succession.