Interval timer device

Details Interval timer device Interval timer device

1982-05-24

1984-05-22

Perkey, William B.

354266, 354419, G03B 1505, G03B 1740

Patent

active

044498047

ABSTRACT:
The present invention relates to an interval timer device for a camera, particularly an interval timer for producing a release signal for operating the shutter release operation of a camera at a certain predetermined frequency and a charge signal for performing the charge operation of the flash device a certain predetermined time before the release signal is produced. In the case of this kind of the interval timer device, because the flash device has been charged a certain predetermined time before the release signal is produced, the flash time can be emitted without fail at the time of photographing. However, because the above device is charged independently of the object brightness, even in case the object brightness is so high that the flash photography is not necessary, unnecessary power is often consumed. In accordance with the present invention, the interval timer device produces the above charge signal only in case of a low object brightness, so as to eliminate the above shortcomings.

REFERENCES:
patent: 3961342 (1976-06-01), Masda
patent: 4086582 (1978-04-01), Kiyohara et al.
patent: 4096500 (1978-06-01), Lermann et al.
patent: 4161355 (1979-07-01), Sahara et al.
patent: 4239361 (1980-12-01), Harvey
patent: 4364647 (1982-12-01), Kawamura et al.

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