Power supply control device for cameras

Details Power supply control device for cameras Power supply control device for cameras

1978-04-19

1979-11-13

Hix, L. T.

354145, G03B 1724, G03B 1505

Patent

active

041741650

ABSTRACT:
In a camera provided with a data or auxiliary information recording device and an electronic flash device for illuminating an object scene to be photographed, another electronic flash device is provided for the illumination of data to be recorded. A single power source is used for both the above two electronic flash devices and an automatic exposure control circuit. To avoid a voltage drop of the power source during the operation of the exposure control circuit due to charging of the main capacitor for the electronic flash for the scene illumination, a power supply switch for the main capacitor charging circuit is manually closed independently of the camera exposure operation. A capacitor for energizing the electronic flash for the data illumination is charged in conjunction with the camera release operation before the camera exposure is commenced.

REFERENCES:
patent: 3813679 (1974-05-01), Hasegawa et al.
patent: 3842428 (1974-10-01), Kawasaki
patent: 3849784 (1974-11-01), Holzapfel
patent: 3886443 (1975-05-01), Miyakawa et al.
patent: 3906523 (1975-09-01), Ogiso et al.
patent: 4025931 (1977-05-01), Taguchi et al.
patent: 4062027 (1977-12-01), Miyazaki et al.
patent: 4067030 (1978-01-01), Kuramoto et al.

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