Automatic film-exposure control system and electrical power supp

Details Automatic film-exposure control system and electrical power supp Automatic film-exposure control system and electrical power supp

1977-06-10

1978-10-03

Adams, Russell E.

Electrical generator or motor structure

Dynamoelectric

Rotary

354 60R, 354 60F, 354135, 310 15, G03B 708

Patent

active

041187172

ABSTRACT:
The "f" stop of a camera having a fixed shutter speed is automatically set by a galvanometer type control component that is energized by a mechanically powered electric generator which constitutes an integral part of the camera. The shutter is tripped in predetermined time-delayed sequence relative to tripping of the generator and the latter is automatically recocked along with the shutter when the film is advanced. Precise and reliable dynamic regulation and setting of the "f " stop as the picture is being taken is thus achieved without the aid of a battery.

REFERENCES:
patent: 2051061 (1936-08-01), Tonnies
patent: 2491902 (1949-12-01), Ostline
patent: 3442194 (1969-05-01), Sho
patent: 3598030 (1971-08-01), Beach
patent: 3651748 (1972-03-01), Yoshiada
patent: 3703132 (1972-11-01), Beach
patent: 3709118 (1973-01-01), Shoupp et al.

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