1979-10-16
1983-06-14
Rubinson, G. Z.
354 60E, G03B 726
Patent
active
043879772
ABSTRACT:
The disclosed camera power control devices operate with a camera in which a first switch responds to initial movement of a shutter release member, and a second switch responds to further movement of the release member. In the power control device, turning the first switch on energizes the light metering and display circuits, and turning on the second switch supplies an exposure control circuit such as a shutter control circuit with electrical energy. The power control device is provided with an electrical timer circuit, and a selection arrangement operates to selectively actuate the timer circuit when the release member is returned to its rest position and the first switch changes is state from ON to OFF. During a period of time determined by the timer circuit, power continues to be supplied to operate the light metering and display circuits.
REFERENCES:
patent: 3879137 (1975-04-01), Sakazaki et al.
patent: 4003063 (1977-01-01), Takahashi et al.
patent: 4145130 (1979-03-01), Shimizu et al.
patent: 4209244 (1980-06-01), Sahara et al.
patent: 4239358 (1980-12-01), Ohtsubo et al.
patent: 4281917 (1981-08-01), Kitagawa et al.
Aizawa Hiroshi
Shimizu Masami
Suzuki Nobuyuki
Uchidoi Masanori
Urushihara Kazunobu
Brady W. J.
Canon Kabushiki Kaisha
Rubinson G. Z.
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