Card – picture – or sign exhibiting – Photographic transparency viewer – e.g. – x-ray viewer – Hand held slide viewer
Patent
1977-12-29
1979-11-27
Pitrelli, John F.
Card, picture, or sign exhibiting
Photographic transparency viewer, e.g., x-ray viewer
Hand held slide viewer
G02G 2722
Patent
active
041753445
ABSTRACT:
A viewer for the successive viewing of a number of transparent images, comprising a casing with a viewing aperture provided with a lens and a counter-aperture aligned therewith which apertures are formed in two opposite faces of the casing, and further comprising a carrier which is detachably fitted in the casing and which supports a number of images in such a way that they are visible from both sides of the carrier, which carrier can be advanced by means of an advancing member that is connected movably to the casing and that is operated manually. The carrier comprises a strip-shaped slide which can move lengthwise through the casing by operating the advancing member and which is provided with means for detachably fixing a film strip thereon.
REFERENCES:
patent: 507529 (1893-10-01), Doe
patent: 2583510 (1952-01-01), Ingram
patent: 2674920 (1954-04-01), Bennett
Pitrelli John F.
Sales Promotion Spits B.V.
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