Electrically controlled camera device

Details Electrically controlled camera device Electrically controlled camera device

1977-11-07

1979-10-23

Adams, Russell E.

354289, G03B 1700

Patent

active

041718844

ABSTRACT:
An electrically controlled camera device is disclosed which includes a counter for counting the number of pulses representative of the preferentially selected one exposure condition of a shutter speed and a diaphragm aperture level to control the preferentially selected one exposure condition, and a digital operation circuit for calculating the other exposure condition in the form of a number of digital pulses in accordance with the output pulses from the counter and with digital data signals representative of the sensed scene brightness and the film sensitivity used. During automatic exposure, the number of pulses counted by the counter is controlled by the combination of a pulse generator and a single-throw mechanical switch connected between the pulse generator and the counter, and the number of output digital pulses from the digital operation circuit is counted by another counter for controlling the other exposure condition. During manual exposure, the number of pulses representative of the other exposure condition is controlled by the combination of the pulse generator and another single-throw mechanical switch and counted by the other counter coupled to the pulse generator through an automatic/manual change-over switch and the other single-throw mechanical switch and controlling the other exposure condition. Both the single-throw mechanical switches are arranged to be operated by corresponding push buttons mounted outside the camera housing, and two sets of indicator lamps for displaying both the exposure conditions are arranged within the field of view of the camera finder.

REFERENCES:
patent: 4051489 (1977-09-01), Saito et al.
patent: 4079386 (1978-03-01), Murakami et al.
patent: 4081813 (1978-03-01), Kawamura et al.

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