Optics: image projectors – Housing
Patent
1975-01-09
1976-04-27
Bell, Jr., Houston S.
Optics: image projectors
Housing
353 78, 353 15, 352 72, G03B 2110, G03B 2128
Patent
active
039531201
ABSTRACT:
A film strip projector which is provided with synchronized audio accompaniment. A film strip is framed with respect to a projection aperture by a selectively operable framing device. Once the film strip is initially framed, the film strip is advanced frame by frame by a Geneva type film advance mechanism. The audio accompaniment is carried on a dual track audio tape, one track of which carries the audio message pertinent to a particular frame and the other track of which carries a control signal for the film drive mechanism. All of the operative components of the film transporting mechanisms are mounted on a unitarily molded chassis. The chassis includes features for mounting a set of optics for easy removal and cleaning.
REFERENCES:
patent: 2881659 (1959-04-01), Engle
patent: 3007370 (1961-11-01), McMaster
patent: 3762810 (1973-10-01), Kimsinger
patent: 3799420 (1974-03-01), Badslich
Badalich Frank C.
Pawl George J.
Bell & Howell Company
Bell, Jr. Houston S.
Fitz-Gerald Roger M.
Hoffman John R.
Mirabito A. J.
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