Optics: image projectors – Selective data retrieval
Patent
1981-07-24
1983-06-21
Haroian, Harry N.
Optics: image projectors
Selective data retrieval
G03B 2308, G03B 2312
Patent
active
043891039
ABSTRACT:
The slide projector includes a side-by-side image-projection systems and a circular slide tray, with slides passing in operation directly between the slide tray and either of two slide gates, the slide gates moving between a first position in which slides are acquired and released, and a second position in which slides are projected onto a screen. A slide lifter, a slide tray lock, slide clamps on each slide gate, and the slide gates are operated in a particular sequence relative to the movement of the slide tray to insure proper handling of the slides in the projector. The slide tray fits on a central hub which in turn is independently driven. Sensors are provided to continuously detect the position of the lifter, the slide gates, and the slide tray. A front end assembly which incorporates lenses which move laterally and vertically, with the longitudinal axes of the lenses remaining parallel at all times, provides precise image alignment, including image overlap and separation.
REFERENCES:
patent: 3856391 (1974-12-01), Hickey et al.
patent: 4165161 (1979-08-01), Kramer
patent: 4204753 (1980-05-01), Kool et al.
Haroian Harry N.
Source Technology Corporation
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