Battery electrolyte level indicator

Details Battery electrolyte level indicator Battery electrolyte level indicator

1975-11-26

1976-12-07

Caldwell, John W.

Communications: electrical

Systems

Call station

429 92, 340244C, G08B 2100

Patent

active

039965791

ABSTRACT:
A battery electrolyte level indicator for indicating when the electrolyte of a wet cell battery has fallen below a minimum acceptable level. A probe pair is disposed in each cell of the battery to a depth corresponding to the minimum acceptable level of the electrolyte contained therein. The probe pairs are connected in series with a light emitting diode connected between the probe pairs in the end battery cells. The series connected probe pairs and the light emitting diode form a complete circuit loop. Current limiting resistors bridge each probe pair such that when the electrolyte level in any one cell is below the minimum acceptable level, the current limiting resistor replaces the probe pair in the complete circuit loop, thus turning off the light emitting diode.

REFERENCES:
patent: 1695917 (1928-12-01), Conrad

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