Patent
1979-07-26
1981-02-10
Gellner, Michael L.
354 50, G03B 7093
Patent
active
042498090
ABSTRACT:
In automatic control systems for cameras, it is highly desirable to be able to conduct automatic continuous photographing under optimum photographing conditions even when a measured light value varies during the photographing operation. To achieve this, a calculation circuit is provided for calculating an amount of electricity to comprise electric information corresponding to the photographing conditions with reference to the measured light value and the sensitivity of the film. Photographing is accomplished in accordance with these photographing conditions by virtue of said automatic control circuit generating a control signal for controlling a shutter mechanism of the camera to end the exposure of the film. The automatic control system includes a memory circuit for memorizing the electric information corresponding to the photographing conditions. A system resetting signal is generated in accordance with a change in the waveform of said control signal after the control signal ends the exposure of the film so that the electric information memorized by said memory circuit is erased.
REFERENCES:
patent: 3798662 (1974-03-01), Suzuki
patent: 3999191 (1976-12-01), Saito et al.
Iwasaki Takashiroh
Kanemaru Kenji
Gellner Michael L.
Hitachi , Ltd.
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