Battery charging circuit for an emergency system

Details Battery charging circuit for an emergency system Battery charging circuit for an emergency system

1978-05-31

1980-09-16

Hix, L. T.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

320 9, 315 86, 340333, 362 20, H82J 710

Patent

active

042232325

ABSTRACT:
A single active element performs the multiple functions of regulating DC voltage level from an AC source supplied to charge a battery and of coupling the battery to power an emergency system such as an emergency lighting system upon loss of the AC source. Preferably, the single active element also performs a third function of disconnecting the battery from the emergency system in time to prevent over discharge and consequent permanent damage to the battery.

REFERENCES:
patent: 3189788 (1965-06-01), Cady
patent: 3255398 (1966-06-01), Bagno
patent: 3278823 (1966-10-01), Ross
patent: 3596106 (1971-07-01), Raddi
patent: 3746877 (1973-07-01), Seiter
patent: 3808499 (1974-04-01), Edwards
patent: 3939359 (1976-02-01), Nehushtan
patent: 3976986 (1976-08-01), Zabroski
patent: 3979656 (1976-09-01), Takeda

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