Rear projection viewer having automatically erecting auxiliary s

Details Rear projection viewer having automatically erecting auxiliary s Rear projection viewer having automatically erecting auxiliary s

1978-01-05

1979-02-13

Hayes, Monroe H.

Optics: motion pictures

Cabinet-type projector

352133, 350123, 353 72, 353 74, 353 76, 353 78, G03B 2110

Patent

active

041392833

ABSTRACT:
A rear projection viewer apparatus of the type wherein a projected image is projected towards a primary viewing screen which when in its operative viewing position forms the front of the viewer, the front viewing screen being attached to other portions of the viewer housing so that it may be moved to an inoperative position. A second rear projection screen substantially smaller than the first screen is mounted within the viewer housing in a manner where it may be moved from an inoperative position where it does not interfere with projecting to the primary viewing screen to an operative position wherein the images may be projected upon the rear thereof. Means are provided for automatically moving the small auxiliary screen from its inoperative position to its operative position in response to manual displacement of the primary viewing screen from its operative position to its inoperative position.

REFERENCES:
patent: 3791725 (1974-02-01), Young
patent: 3834798 (1974-09-01), Bundschuh et al.

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