Battery checking device of a motor driven camera

Details Battery checking device of a motor driven camera Battery checking device of a motor driven camera

1981-05-21

1982-09-21

Adams, Russell E.

354289, G03B 118

Patent

active

043504221

ABSTRACT:
A motor driven camera has a power source, a motor connected to the power source and driven by the voltage of the power source, a constant voltage circuit for converting the voltage of the power source into a predetermined constant voltage and putting out the constant voltage, and an electric circuit connected to the constant voltage circuit and driven by the constant voltage circuit. The camera further has a battery checking device which includes a discriminating circuit for receiving the output of the constant voltage circuit and the output of the power source, comparing the two outputs and discriminating whether the voltage of the power source is above a predetermined level, and an indication circuit for receiving the output of the discriminating circuit and indicating the condition of the power source.

REFERENCES:
patent: 4167314 (1979-09-01), Ichiyanagi et al.
patent: 4176936 (1979-12-01), Kozuki et al.
patent: 4220407 (1980-09-01), Stemme et al.
patent: 4269494 (1981-05-01), Shiozowa et al.
patent: 4281912 (1981-08-01), Maida

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