Automatic information retrieval device

Details Automatic information retrieval device Automatic information retrieval device

1975-12-10

1978-01-17

Mautz, George F.

Optics: image projectors

Selective data retrieval

Film strip

353120, G03B 2312

Patent

active

040689344

ABSTRACT:
An automatic information retrieval device employing an information-containing film wound on reels housed in a cartridge, which retrieval device is provided with a servo system for driving one of the film reels by a servo-controlled motor and the other of the film reels by a one directional constant torque motor so as to apply proper tension to the film between the reels for rapid and accurate selection of a desired information frame of the film without disengagement of the film ends from the reels. The retrieval device further employs an information film having counting blip-marks, parity check marks and non-light transmitting portion for accurate positioning of the desired frame.

REFERENCES:
patent: 3184177 (1965-05-01), Hannah
patent: 3290987 (1966-12-01), James et al.
patent: 3678282 (1972-07-01), Johnson et al.
patent: 3708677 (1973-01-01), Volk et al.
patent: 3744890 (1973-07-01), Suzuki et al.

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