Exposure control device for photographic camera

Details Exposure control device for photographic camera Exposure control device for photographic camera

1977-02-22

1978-10-17

Griffin, Donald A.

354139, 354275, 354289, G03B 700, G03B 1503, G03B 1726, G03B 1700

Patent

active

041212304

ABSTRACT:
An exposure control device for a photographic camera including an exposure control plate for changing an aperture size, a mark indicating plate bearing a plurality of weather marks arranged in a line movable in the direction in which the marks are lined, and a manually operable exposure control knob connected with the exposure control plate. The exposure control knob has an index to be selectively aligned with one of the weather marks. A plurality of distance marks are arranged in a line parallel to the weather marks on the mark indicating plate. The mark indicating plate is movable in a direction perpendicular to the direction in which the marks are lined so that one of the two lines of marks is selectively indicated through an indicator window. A flash sensor which senses the attachment and removal of a flash light device to and from the camera body is connected with the mark indicating plate to move the plate in the direction to selectively indicate one of the two lines of marks through the indicator window in response to attachment and removal of the flash light device. In a preferred embodiment, a film sensitivity sensor which senses the sensitivity of the film loaded in a film cartridge in the camera is connected with the mark indicating plate to move the plate in the direction in which the marks are lined.

REFERENCES:
patent: 3318215 (1967-05-01), Schiks
patent: 3421422 (1969-01-01), Winkler
patent: 3570382 (1971-03-01), Neudecker et al.
patent: 3817608 (1974-06-01), Neudecker et al.
patent: 4041508 (1977-08-01), Edomoto et al.

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