Abstract: A method of fabricating a tread plate having alternating stripes incorporated thereon is disclosed. The tread plate is comprised of a base plate typically formed from a metallic extrusion. Alternating stripes of resinous material are placed on the base plate and are angularly positioned thereon with respect to the longitudinal axis of the base plate. The alternating stripes of resinous material have a coloring pigment incorporated therein permitting the alternating stripes of resinous material to provide a visual warning to individuals of the existence of a potentially hazardous condition or situation when the tread plate is installed in a particular location.

Abstract: A method of fabricating a tread plate having alternating stripes incorporated thereon is disclosed. The tread plate is comprised of a base plate typically formed from a metallic extrusion. Alternating stripes of resinous material are placed on the base plate and are angularly positioned thereon with respect to the longitudinal axis of the base plate. The alternating stripes of resinous material have a coloring pigment incorporated therein permitting the alternating stripes of resinous material to provide a visual warning to individuals of the existence of a potentially hazardous condition or situation when the tread plate is installed in a particular location.

Abstract: This invention is concerned with light transmitting screens which can be used in printing of half-tone illustrations such as photographs and in color television. The screen is formed on one face with a plurality of projections or depressions which so adjoin one another that the face is free of interstices, light incident on the contoured surface so formed being refracted as it passes through the screen to break up the image being transmitted into a pattern of dots. For use in color television, the projections or depressions are defined as triangular pyramids whose surfaces are subtended from their bases at different angles to be in sympathy with the wavelengths of the different colors being transmitted.