Patent
1983-09-09
1985-05-21
Perkey, William B.
354458, G03B 700, G03B 1505
Patent
active
045182434
ABSTRACT:
A shutter speed setting device for a camera having a signal generator for providing an output in correspondence to the setting of a shutter speed to be set and a shutter speed setting circuit for providing a signal corresponding with a shutter speed in response to an output from the signal generator. A flash unit is connected to the shutter speed setting circuit and is controlled with a shutter speed equivalent to a flash synchronization speed. A charge completion signal conversion circuit converts into a predetermined signal a charge completion signal from the flash unit which represents whether or not said flash unit is energized for use. The shutter speed setting circuit operates so that when, in the case where said flash unit is charged and the charge completion signal is provided, a preset shutter speed is higher than the flash synchronization speed, setting a shutter speed higher than said synchronization speed is inhibited in a new shutter speed setting operation with the signal generator. When the preset shutter speed is lower than the flash synchronization speed, a new shutter speed can be set as desired until the new shutter speed reaches the flash synchronization speed.
REFERENCES:
patent: 4021824 (1977-05-01), Uchiyama et al.
patent: 4225218 (1980-09-01), Numata
patent: 4244643 (1981-01-01), Tokutomi
patent: 4345826 (1982-08-01), Takahashi et al.
Asahi Kogaku Kogyo Kabushiki Kaisha
Perkey William B.
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