System for audibly indicating necessary information for the phot

Details System for audibly indicating necessary information for the phot System for audibly indicating necessary information for the phot

1982-03-19

1984-09-18

Adams, Russell E.

3542671, G03B 1718

Patent

active

044720459

ABSTRACT:
An indication system of a camera for audibly and distinguishably indicating at least two different kinds of information of the operating state of a self-timer, a warning against the photographing operation for insufficient brightness of the object or low range of a shutter speed, the voltage checking of a battery and the other necessary information for photographing operation. The indication system comprises an acoustic device having a sound which varies in volume, tone or time interval thereof in accordance with various kinds of output signals of a controlling circuit for digitally controlling the acoustic device by means of counting signals of a binary counter.

REFERENCES:
patent: 3776625 (1973-12-01), Fountain
patent: 4072973 (1978-02-01), Mayo
patent: 4174888 (1979-11-01), Hunn et al.
patent: 4223987 (1980-09-01), Shimizu et al.

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