Abstract: A device for projecting images from a film strip onto a suitable sheet of drawing paper includes a housing having a source of illumination mounted on the interior. A drawing surface is provided on the housing for supporting the drawing paper and a guideway mounting a film strip with images to be traced is located within the housing between the source of illumination and the drawing surface. A shield is rotatably mounted in the housing to block a part of the film strip from the source of illumination, so that, at any given time, only a portion of an image on the film strip is projected onto the drawing surface. A device for rotating the shield to sequentially expose the entire image to the source of illumination is provided and interconnected to a device for generating a sound as the shield is rotated. An index member is defined on the housing for indexing the film strip within the housing.

Abstract: A compact microimage viewing apparatus is disclosed which utilizes a low intensity light source with wide-angle projection optics to provide a clear and highly illuminated image to the viewer. To achieve compactness, the high brightness light-distributive screen of the viewing apparatus is located at an acute angle to the axis of projection of the projection lens. Keystone distortion of the projected image is substantially eliminated by employing a correcting lens, preferably a Fresnel lens, between the screen and the viewer at a predetermined angle to the screen such that the image portion projected onto the edge of the screen nearest to the projection lens, which would otherwise appear smaller to the viewer than would the image portion projected onto the farthermost edge of the screen, is magnified to an extent that a rectangular and substantially non-distorted image is presented to the viewer.

Abstract: A system for the projection of the magnified image of the liquid contents on the wall of a test tube includes a light-tight cabinet, a light source, a test tube holding means which preferably positions the test tube at an angle of 10.degree.-40.degree. from the horizontal, a projection lens and a rear viewing screen.

Abstract: This device is designed to be affixed to the television screen for functional value is based upon a general enhancement of the picture, yielding a more sensual viewing experience. The capacity of television is improved by this apparatus for the singular image normally viewed is reflected onto plates surrounding the screen. The scope of television is thus broadened for the original image is accented by the various reflections projected from different viewpoints.

Abstract: A portable microform reader is provided with a microform carrier and a projection system for projecting an enlarged real image of the information carried on a portion of the microform onto a viewing screen. A binocular magnifying system is arranged for viewing the screen and for further enlarging the image thereon to produce a virtual image of acceptable reading size. The projection system comprises a source of illumination, a condenser lens, and a projection lens for projecting an image of the information carried on the microform onto the screen. The magnifying system may consist of appropriate binocular lenses where such lenses, in combination with prismatic converging means, produce the desired magnification. Beam splitting means may alternately be provided to eliminate the need for prismatic converging means, and a mirror arrangement may be provided to "fold" the projected beams for further limiting the size of the reader.

Abstract: A concave mirror is positioned at an angle to a flat surface containing a picture so that a viewer can view the picture as reflected to his eye by the concave mirror. Masking is provided about the marginal edges of the concave mirror to define within the masking a reflecting area less than the total area of the picture. As a result, the degree of visibility of the top, bottom, and side portions of the picture can be changed by the viewer shifting his line of sight, the masking means defining a window which appears closer than the viewed picture so that a three-dimensional effect results. Perspective and keystone effects resulting from the angular relationships are compensated for by varying the width dimensions of the masking and the manner in which the picture is formed on the flat surface.