Apparatus for checking a battery voltage

Details Apparatus for checking a battery voltage Apparatus for checking a battery voltage

1978-02-17

1979-08-07

Tokar, M.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324133, 340706, G01N 2742

Patent

active

041639359

ABSTRACT:
An apparatus for checking the voltage of a power source battery in a photographic camera is disclosed. In simple form, this apparatus comprises first and second series circuits connected in parallel with each other to the battery, the first one of which has a luminous diode and a resistor, and the second one of which has two luminous diodes and a resistor, the characteristics of the luminous diodes and resistors being so selected that, when the actual voltage is dropped from a predetermined level, a difference between the brightnesses of the luminous diodes of the first and second circuits results to apprise the camera operator of the drop in battery voltage.

REFERENCES:
patent: 3534354 (1970-10-01), Galginaitis
patent: 3755806 (1973-08-01), Bunting

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