Overhead projector

Details Overhead projector Overhead projector

1987-01-29

1988-10-11

Haroian, Harry N.

Optics: image projectors

Episcope

Reflector between lamp and screen

353119, G03B 2100

Patent

active

047766883

ABSTRACT:
An overhead projector having a stationary main body including a Fresnel plate, a projection unit, and a swingable member for supporting the projection unit and swingably secured to the main body. The overhead projector comprises one way clutch means through which the swingable member is secured to the main body and which is adapted to limit the swinging motion of the swingable member towards the main body.

REFERENCES:
patent: 3459475 (1969-08-01), Lucas
patent: 4156561 (1979-05-01), Lucas
patent: 4588271 (1986-05-01), Emura

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