Automatic overlay feed apparatus for an overhead projector

Details Automatic overlay feed apparatus for an overhead projector Automatic overlay feed apparatus for an overhead projector

1988-06-27

1990-07-17

Haroian, Harry N.

Optics: image projectors

Selective data retrieval

Film strip

353DIG2, 353DIG5, 353109, G03B 104, G03B 2312

Patent

active

049424114

ABSTRACT:
An automatic overlay feed apparatus (10) for feeding projectable overlays to the object area (16) of an overhead projector (12). The apparatus (10) comprises a frame (20) for being supported on an overhead projector (12) and scrolling means, including a first winding shaft (36) and a second winding shaft (38) for moving an overlay scroll (24) defining a plurality of sequentially arranged projectable overlay sheets (42) across the object area (16) of the projector (12) to allow selective positioning of such projectable overlay sheets (42) on the object area (16). The apparatus (10) also includes motor means for selectively rotating at least one of the winding shafts (36, 38), and remote control means for controlling the operation of the motor means from a position remote from the projector (12).

REFERENCES:
patent: 3364604 (1968-01-01), Donaldson
patent: 3510973 (1970-05-01), Mazzocco
patent: 3680805 (1972-08-01), Stewart
patent: 3785729 (1974-01-01), Dasher
patent: 4456201 (1984-06-01), Frias et al.

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