Photographic camera having an automatic exposure control

Details Photographic camera having an automatic exposure control Photographic camera having an automatic exposure control

1980-01-30

1981-10-06

Adams, Russell E.

354127, 354196, 354198, G03B 700, G03B 1502

Patent

active

042932041

ABSTRACT:
The control mechanism for a photographic camera using film carrtridges having coded marks indicative of the sensitivity of the employed film includes a hand-operated control member for setting at least one exposure parameter, an axially movable objective for setting the distance, an adjustable diaphragm, a scanner movable against the marks on the cartridge for displacing the control member in response to the coded marks, a stationary cam surface engaging the objective, transmission gears coupled between the control member and the objective to axially displace the latter according to a distance setting and according to the shape of the stationary cam and curves provided on the control member to display at least the applicable exposure range and the flash distance limits for the employed film sensitivity.

REFERENCES:
patent: 3368467 (1968-02-01), Hahn
patent: 3481259 (1969-12-01), Langnau et al.
patent: 3491670 (1970-01-01), Rentschler
patent: 3500731 (1970-03-01), Bresson et al.
patent: 4085410 (1978-04-01), Maeda et al.
patent: 4121230 (1978-10-01), Ohmura et al.
patent: 4163613 (1979-08-01), Smart
patent: 4217042 (1980-08-01), Yan

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