Overhead projector

Details Overhead projector Overhead projector

1994-04-28

1995-11-14

Dowling, William C.

Optics: image projectors

Reflector

Plural

353103, 353DIG3, G03B 2302, G03B 2128

Patent

active

054671523

ABSTRACT:
An improved overhead projector which allows for automated feeding of transparencies from input and output trays positioned within a body of the projector. The feed mechanism is reversible to allow previously viewed transparencies to be repositioned over a light source on a table of the projector and seen on a display screen. The transparency trays include retractable mechanisms allowing them to be switched from receiving or delivering transparencies into a feed path. An optical projection head includes an adjustable mechanism to automatically reorient a projected image for transparencies in landscape or portrait views. The adjustable mechanism includes a first mirror which is adjustable to reflect light transmitted from the light source directly from the transparency toward the display screen, or to present a thin vertical profile allowing a light image to reflect off second and third mirrors before reflecting again off the first mirror and toward the display screen. The entire feed and reorientation assemblies can be remotely controllable via a hand-held device and control system.

REFERENCES:
patent: 3110217 (1963-11-01), Millner et al.
patent: 3594082 (1971-07-01), Loncher
patent: 4133605 (1979-01-01), Wiggin
patent: 4264158 (1981-04-01), Lindqvist
patent: 5059020 (1991-10-01), Geneis
Publication "The 3rd Dimension--The Opaque Projector and Automatic Document Feeder", Paper Direct. Inc. Catalog. data unknown. p. 53.

Affiliated with

Also associated with

Rating

Overhead projector does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Overhead projector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Overhead projector will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1224426