Patent
1978-04-04
1980-06-24
Hix, L. T.
354 60R, 354 60L, 354238, 354267, G03B 708, G03B 1718, G03B 1740
Patent
active
042092442
ABSTRACT:
In camera control circuitry including an exposure control circuit for controlling exposure factor or exposure factors, e.g. exposure time and/or diaphragm aperture, in accordance with an output of a light measuring circuit and further including an electromagnetic means for initiating the camera operation, a delay circuit delays the actuation of the exposure control circuit and the electromagnetic means for a short time period. A power supply circuit for the exposure control circuit, the light measuring circuit, the electromagnetic means and the delay circuit, is closed by the closure of a manually controlled switch and the closing condition of the power supply circuit is maintained through a self-maintaining circuit. When the scene brightness is outside of an available range for the exposure control circuit, a detecting circuit generates an output to make inoperative the delay circuit and the self-maintaining circuit so that the exposure control circuit and the electromagnetic means are not actuated. The delay circuit may also be used for self-timer photography.
REFERENCES:
patent: 3106882 (1963-10-01), Maitani
patent: 3690228 (1972-09-01), Yamashita et al.
patent: 4126874 (1978-11-01), Suzuki et al.
patent: 4126877 (1978-11-01), Ohtaki et al.
Nakai Masaaki
Sahara Masayoshi
Hix L. T,.
Minolta Camera Kabushiki Kaisha
Perkey William B.
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