Method and means for controlling the aperture blades of a camera

Details Method and means for controlling the aperture blades of a camera Method and means for controlling the aperture blades of a camera

1982-11-29

1984-06-12

Adams, Russell E.

354452, G03B 902

Patent

active

044538162

ABSTRACT:
The invention is directed to an improved method and apparatus for controlling the aperture blades of a camera in which the aperture stop-down position is controlled by the number of pulses applied to pulse motors. In the present case, the unit-pulse numbers which determine the aperture stop-down position are split into at least two groups, one of which is a multiple of the other, and the blades are moved into the desired position by applying both groups of pulses to the pulse motors.

REFERENCES:
patent: 3997905 (1976-12-01), Iwata et al.
patent: 4016574 (1977-04-01), Iwata et al.
patent: 4041512 (1977-08-01), Iwata et al.
patent: 4074289 (1978-02-01), Nobusawa
patent: 4079390 (1978-03-01), Iwata et al.
patent: 4344678 (1982-08-01), Mizokami
patent: 4367931 (1983-01-01), Kawai et al.

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