Optics: image projectors – Picture carrier
Patent
1983-10-07
1985-02-12
Haroian, Harry N.
Optics: image projectors
Picture carrier
353DIG5, G03B 2100
Patent
active
044987463
ABSTRACT:
An extension platform for holding a book of transparencies in an operative position on an overhead projector includes a body member adapted to receive and hold a pack of transparencies, at least two suction cups positioned on the underside of the body member for attaching and securing the body member to the stage area of an overhead projector and wedge-shaped fulcrum means located under the body member which translates the downward gravitational force of the weight of the pack of transparencies into an upward pull on the suction cups. In another embodiment, the extension platform is attached to part of a book of transparencies.
REFERENCES:
patent: 3642359 (1972-02-01), Kitch
patent: 3709590 (1973-01-01), Bisberg
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