1980-09-16
1982-08-17
Hix, L. T.
354 44, 354271, G03B 7095
Patent
active
043446787
ABSTRACT:
There is provided a diaphragm control device for a camera which comprises a light receiving section to produce stop information corresponding to the brightness of a subject, a stepping motor to rotate stepwise in response to stop information from the light receiving section, and a coupling ring to operate a linking pin of a diaphragm mechanism in accordance with the rise of a mirror, whereby the manipulated variable of the linking pin of the diaphragm mechanism, i.e. the diaphragm opening, is controlled through the engagement between a stopper lever attached to the shaft of the stepping motor and a notch section formed in the coupling ring. The angle of rotation of the stepping motor is so set as not to overreach the middle angle between one of a plurality of initial stop angles of the stepping motor and another stop angle adjacent thereto.
REFERENCES:
patent: 4057810 (1977-11-01), Iwata
patent: 4079390 (1978-03-01), Iwata et al.
Hix L. T,.
Olympus Optical Co,. Ltd.
Schreyer S. D.
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