Foldable transparency enlarger for overhead projector

Details Foldable transparency enlarger for overhead projector Foldable transparency enlarger for overhead projector

1987-05-26

1988-03-01

Haroian, Harry N.

Optics: image projectors

Film gate

And lens support

353DIG5, 353119, 353122, G03B 2128

Patent

active

047281847

ABSTRACT:
A device for supporting a transparency on a top surface of an overhead projector is foldable from a compact unit into a structure having a planar base with an indentation for receiving a transparency and legs which are pivotally mounted on the base and rest on the top of an overhead projector to position the transparency at a specific spacing therefrom. Other pivotal elements position a lens at a given distance above the base so that light from the overhead projector will pass through the transparency and project it on a remote screen without white light showing around the sides of the transparency.

REFERENCES:
patent: 2669156 (1954-02-01), Fitzgerald
patent: 3482911 (1969-12-01), Noble

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