Optics: motion pictures – Cabinet-type projector
Patent
1977-12-30
1979-01-30
Hayes, Monroe H.
Optics: motion pictures
Cabinet-type projector
352133, 350123, 353 72, 353 76, G03B 2110
Patent
active
041369351
ABSTRACT:
A rear projection viewer apparatus of the type wherein a projected image is projected towards a primary viewing screen forming the front of the viewer, the front viewing screen being removably located with respect to other portions of the viewer housing so that it may be removed from the path of the projected images. A second rear projection screen substantially smaller than the first screen is provided. The small screen and selected portions of the viewer housing are provided with complementary structure for selectively locating the second screen at an operative position substantially normal to the projection axis and at a location therealong substantially closer to the image projecting means than the first rear projection screen when it is in its operative position.
REFERENCES:
patent: 3791725 (1974-02-01), Young
patent: 3834798 (1974-09-01), Bundschuh
patent: 3865475 (1975-02-01), Hardy et al.
Cook Gerald H.
Holmes William A.
Goettel, Jr. Frederick A.
Hayes Monroe H.
Polaroid Corporation
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