Optics: image projectors – Cabinet encloses projector and one side of screen – Light shield – mask – hood – or diaphragm
Patent
1978-12-11
1980-06-24
Haroian, Harry N.
Optics: image projectors
Cabinet encloses projector and one side of screen
Light shield, mask, hood, or diaphragm
353 97, G03B 2122
Patent
active
042092370
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.
REFERENCES:
patent: 1559665 (1925-11-01), Beery et al.
patent: 1572671 (1926-02-01), Myers
patent: 2301274 (1942-11-01), Greiser
patent: 3699660 (1972-10-01), Siegel
patent: 3768899 (1973-10-01), Parra
patent: 3914038 (1975-10-01), Liguori
Kuna Wayne A.
Meyer Burton C.
Haroian Harry N.
Marvin Glass & Associates
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