Battery condition indicator

Details Battery condition indicator Battery condition indicator

1989-11-06

1991-02-05

Williams, Hezron E.

Measuring and testing

Specific gravity or density of liquid or solid

Multiple floats of graduated density

429 91, 73447, 73291, 73454, G01N 910

Patent

active

049894536

ABSTRACT:
A battery condition readout device is disclosed. A series of slides of varying densities float or sink according to the amount of charge. An optical system permits slide position to be seen at a point external to the battery.

REFERENCES:
patent: 4074025 (1978-02-01), Miyagawa
patent: 4240282 (1980-12-01), Nelsen

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