1976-04-20
1978-03-14
Adams, Russell E.
354 38, 354 60A, 354271, 354289, G03B 1700, G03B 708
Patent
active
040793869
ABSTRACT:
The present invention relates to a camera with a displacement means for controlling the exposure amount as the function of the mechanical displacement position. The displacement means are so designed that a brush is slid over a comb-shaped conductive pattern mechanically linked with the displacement means so as to convert the displacement position of the displacement means into a pulse number. Further, when the pulse number reaches a certain determined value, the displacement means is stopped in such a manner that the pulse number corresponds with the exposure amount and characterized in that, by determining the position at which each conductor of the comb-shaped conductive pattern is provided, relative to the position at which the displacement means stops in accordance with the displacement speed of the displacement means, the displacement amount of the displacement means due to the time delay since the pulse number reaches a certain determined amount till the displacement means actually stops is compensated so that the pulse number always corresponds with the displacement position in a precise way.
REFERENCES:
patent: 3928858 (1975-12-01), Sakurada et al.
patent: 3971048 (1976-07-01), Ito et al.
Ito Fumio
Ito Tadashi
Kawamura Masaharu
Murakami Hiroyashu
Sakurada Nobuaki
Adams Russell E.
Canon Kabushiki Kaisha
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