Optics: image projectors – Plural
Patent
1981-07-24
1984-10-02
Haroian, Harry N.
Optics: image projectors
Plural
353 89, 353101, G03B 2120
Patent
active
044744404
ABSTRACT:
The slide projector includes 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: 3276314 (1966-10-01), Robinson
patent: 3501233 (1970-03-01), Winkler et al.
patent: 4165161 (1979-08-01), Kramer
Ballard Albert S.
Kramer Milo G.
Haroian Harry N.
Source Technologies Corporation
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