Optics: image projectors – Cabinet encloses projector and one side of screen – Reflector between lamp and screen
Patent
1975-01-09
1977-05-10
Haroian, Harry N.
Optics: image projectors
Cabinet encloses projector and one side of screen
Reflector between lamp and screen
353119, G03B 2128
Patent
active
040225267
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. The film strip projector includes a portable model as an alternate embodiment which includes a handle positioned generally above the center of gravity of the projector when in the open position so that it is not necessary to collapse or close the projector in order to move it. The portable model also includes a friction braking device to prevent injury to the screen or the internal components. A pivotally mounted light shield also is provided to facilitate easy replacement of the high wattage light source.
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Badalich Frank C.
Pawl George J.
Bell & Howell Company
Fitz-Gerald Roger M.
Haroian Harry N.
Hoffman John R.
Schneider Robert
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