Flash camera system with daylight cutout control

Details Flash camera system with daylight cutout control Flash camera system with daylight cutout control

1978-07-28

1980-12-09

Miller, Jr., George H.

354149, 354234, G03B 1505

Patent

active

042381495

ABSTRACT:
A shutter control circuit which normally responds to ambient light switches automatically to a flash mode in response to a charge signal from a flash unit. The light flash eliminates the charge signal. To prevent the absence of a charge signal from returning the shutter to daylight control, a shutter closing signal is generated before a flash synchronizing contact is closed and hence before the charge signal ends. However shutter closing action is then started only after a delay that provides time for the flash to occur when the shutter is fully open.

REFERENCES:
patent: 2930298 (1960-03-01), Suzukawa
patent: 3529526 (1970-09-01), Wick et al.
patent: 4016575 (1977-04-01), Ochiyama et al.

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