Abstract: Some new truck and van weather seals have a cross-sectional shape like an inverted U, with inwardly upturned, flexible feet. These feet seal against the opposite sides of the window glass when the window is closed. Special retainer means are disclosed for holding rain shields in the upper horizontal casings of motor vehicle windows that are fitted with this type of resilient seal. The retainer means comprises a combination of (a) a substantially U-shaped plastic channel member that fits inside the seal, and which is held by the seal's upturned feet, and (b) a substantially U-shaped steel clip that is held inside the channel member, and which clamps and holds the top edge of the rain shield in the casing.

Abstract: A method and apparatus for producing and viewing stereoscopic images through the use of a color coded image whereby the desired depth or distance is based upon the color of the portion of the image being viewed. Therefore the parts of the image which are to appear distant are colored red whereas the parts of the image to appear in the foreground are colored blue with the middle ground or intermediate distances being colored green or yellow. The color coded image is viewed through a prism glass constructed so that blue light which passes through the prism is bent toward a sharper angle than red light. Because the apex of the prism before each eye points toward the nose or center of the glasses the eyes must then turn more inward to see a blue object than to see a red object even though they are in actuality in the same plane on the display.

Abstract: A spiral Fresnel reflector is formed by plotting a predetermined developed spiral on a flat sheet of reflecting material, cutting the flat sheet of reflecting material along the developed spiral and winding up the developed spiral until the spiral arms focus reflective light at a focal area. The developed spiral can have either a positive or a negative focal length.