Camera with electrical shutter

Details Camera with electrical shutter Camera with electrical shutter

1982-07-22

1984-07-03

Perkey, William B.

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Plural load device systems

354420, 315241P, G03B 7083, G03B 1505

Patent

active

044576013

ABSTRACT:
A camera with an electrical shutter comprises auxiliary shutter closing means which is responsive to an electrical signal supplied from an electronic flash to operate a photometric circuit of the camera in a normal manner. During a flash photographing operation using an electronic flash, if an amount of light incident on a light receiving element in the photometric circuit is less than a given value, an electrical signal which is supplied by the electronic flash upon occurrence of the flashlight illumination from a flash discharge tube is applied to the auxiliary closing means, thereby forcibly closing the shutter.

REFERENCES:
patent: 3720144 (1973-03-01), Uchiyama
patent: 3846812 (1974-11-01), Biber
patent: 3995286 (1976-11-01), Tokutomi
patent: 3999193 (1976-12-01), Hasegawa
patent: 4012665 (1977-03-01), Nakamura et al.
patent: 4163924 (1979-08-01), Hasegawa et al.
patent: 4199242 (1980-04-01), Hosomizu et al.

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