Optics: motion pictures – With threading structure – Self-feeding type
Patent
1975-12-17
1977-07-26
Hayes, Monroe H.
Optics: motion pictures
With threading structure
Self-feeding type
352224, G03B 158
Patent
active
040379493
ABSTRACT:
A motion picture projector having a slot for edgewise loading of the film is provided with a film strip encapsulating and drive system which is operated by a single control lever. Operation of a control lever moves a plurality of film path forming elements to an open position so that edgewise insertion of the film into the projector automatically forms loops on either side of a film gate. Closure of the control lever encapsulates the film strip within film gate drive sprockets and around a sound drum while maintaining free loops on either side of the film gate. The actuator includes a pair of switches to shut down a drive system projection lamp and an audio amplifier when moving between an open or loading position and a closed position to prevent inadvertent damage to the film which could occur if the drive means continued in operation. A second switch connected to the projection lamp and audio amplifier maintains these units in an off position when the actuator is in an open position.
REFERENCES:
patent: 1262611 (1918-04-01), Krug
patent: 1973477 (1934-09-01), Fritts
patent: 2033225 (1936-03-01), Bornmann
patent: 3119300 (1964-01-01), Barolela
patent: 3363851 (1968-01-01), Rube
patent: 3492067 (1970-01-01), Matsubara
patent: 3720461 (1973-03-01), Reinsch
patent: 3734602 (1973-05-01), Deck
patent: 3776623 (1973-12-01), Browder
patent: 3848981 (1974-11-01), Chedister
Kerstein Melvin T.
Pasturczak Vincent S.
Bell & Howell Company
Fitz-Gerald Roger M.
Hayes Monroe H.
Hoffman John R.
Schneider Robert J.
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