Card – picture – or sign exhibiting – Photographic transparency viewer – e.g. – x-ray viewer – Portable slide viewer
Patent
1976-10-01
1980-01-29
Mancene, Louis G.
Card, picture, or sign exhibiting
Photographic transparency viewer, e.g., x-ray viewer
Portable slide viewer
401522, 40564, G02B 2702
Patent
active
041854071
ABSTRACT:
The present improved display device permits the improved viewing of such specimens as transparent films, both negatives and positives, translucent objects, such as drawings and water-color prints, selected minerals, and opaque objects smaller than the viewing plate of the device.
The device is inexpensive to make and use and operates economically on a low wattage light source. The device includes an open topped box with a light, such as a low wattage electric light, therein. To the top of the box is affixed a translucent display sheet, while a frame which is preferably glassed in, is hingedly connected to overlie the display sheet so that speciments can be easily placed on and removed from the display sheet.
The distance and angle between the light and the display sheet preferably can be varied so as to provide different display effects. In one embodiment, the light is secured at a distance from the center on the box bottom and the sidewalls with attached display sheet are rotated relative thereto.
In another embodiment, the sidewalls telescope to vary the vertical distance of the display sheet from the box bottom.
In a third embodiment, the light is movable on a track above the box bottom. To further enhance the display, the display sheet may be mottled and/or vari-colored, and/or may have built-in light-orienting means.
The device may also have a grid or the like disposed between the display sheet and box bottom to provide a decorative light display. Accordingly, an improved graphic display can be provided in an economical manner.
REFERENCES:
patent: 1759544 (1930-05-01), Croes
patent: 2282167 (1942-05-01), Cullman
patent: 2294444 (1942-09-01), Boroughs
patent: 2501840 (1950-03-01), Bradford
patent: 2567561 (1951-09-01), Hoffmann
patent: 3359669 (1967-12-01), Masters
Contreras Wenceslao J.
Mancene Louis G.
Posta Jr. John J.
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