Optics: image projectors – Slide transfer mechanism – Slides reciprocated horizontally
Patent
1976-08-30
1978-05-02
Aegerter, Richard E.
Optics: image projectors
Slide transfer mechanism
Slides reciprocated horizontally
353 94, G30B 2304
Patent
active
040871673
ABSTRACT:
A dual or twin projector arranged to take picture slides from a single magazine located between the two projectors, and to return the slides to the same magazine after projection, in proper order ready for another projection operation. The planes of the picture gates of the two projectors are slightly staggered or offset from each other in the direction of the optical axis, preferably by a distance equal to the spacing of the slides in the magazine, so that, for certain types of operation, one slide may be fed from the magazine to one projector simultaneously with the feeding of the next slide from the magazine to the other projector. The projectors, or at least their optical systems, are adjustable laterally so that, for one mode of operation, both projectors will project pictures onto the same area of the viewing screen, for lap dissolve or fade-in-fade-out operation, or in another mode, the two projectors will project pictures onto the viewing screen in side-by-side relation, permitting panoramic viewing or stereoscopic viewing, as desired. Motor driven gearing is provided for transporting slides from the magazine to the respective gates of the respective projectors, and back to the magazine, and for causing the transport or feeding of the magazine itself in proper synchronization with the slide transport, the gearing being readily adjustable to produce, as desired, either alternate feeding of slides to the two projectors, for lap-dissolve mode of operation, or simultaneous feeding of slides to the two projectors, for panoramic or stereoscopic mode of operation.
REFERENCES:
patent: 3006243 (1961-10-01), Zillmer
patent: 3059360 (1962-10-01), Krauskopf
patent: 3143036 (1964-08-01), Rohmann
patent: 3161109 (1964-12-01), Carrillo
patent: 3462215 (1969-08-01), Floden
patent: 3468603 (1969-09-01), Kovarik et al.
patent: 3501232 (1970-03-01), Jackson
Aegerter Richard E.
Rollei-Werke Franke & Heidecke
Shepperd John W.
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