Projection apparatus

Details Projection apparatus Projection apparatus

1993-07-08

1995-06-13

Cuchlinski, Jr., William A.

Optics: image projectors

Selective data retrieval

Film strip

353 19, 353DIG2, G03B 3106, G03B 2143

Patent

active

054247900

ABSTRACT:
A projection apparatus comprising a holding section for holding a film cassette having an exposed magnetic-zoned film therein, motors for automatically drawing out the leader portion of the film from the film cassette and for forwardly feeding the film with a predetermined timing, a projection lamp and a projection lens pair for illuminating the film to project an image, a magnetic head for detecting magnetic information on the film, a shutter which operates in accordance with the magnetic information detected by the magnetic head, and a control circuit for operating the motors and the shutter in accordance with programs, thereby controlling the film feed timing and shutter operation timing.

REFERENCES:
patent: 3276313 (1966-10-01), Schwartz et al.
patent: 3344709 (1967-10-01), Taylor
patent: 3697158 (1972-10-01), Mateja
patent: 3848978 (1974-11-01), Wray
patent: 3981570 (1976-09-01), Ashida et al.
patent: 4277152 (1981-07-01), Taylor
patent: 4791496 (1988-12-01), Kageyama et al.
patent: 4883235 (1989-11-01), Niedospial, Jr.

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