Emergency light battery charger circuit

Details Emergency light battery charger circuit Emergency light battery charger circuit

1977-04-25

1979-04-17

Hix, L. T.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

362 20, 362183, H02J 710, H02J 902

Patent

active

041503023

ABSTRACT:
A battery charger circuit for providing a charging current to a rechargeable battery from AC line voltage. The charger circuit is especially adapted for use in an emergency light and includes circuitry to provide automatic charging current shut-off when the battery is fully charged. Failure of AC power is detected by the charger circuit, and current is applied to an emergency lamp in response to such failure. Circuitry is included for monitoring the charge state of the battery and for interrupting discharge current to the lamp from the battery when the charge state falls below a predetermined limit. Provision is included for use of the battery charger circuit in a portable lantern configuration.

REFERENCES:
patent: 3573483 (1971-04-01), White
patent: 3939359 (1976-02-01), Nehushtan

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