Emergency light control and battery charging system

Details Emergency light control and battery charging system Emergency light control and battery charging system

1988-11-21

1989-12-26

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

315 86, H02J 700, H02J 900

Patent

active

048900044

ABSTRACT:
An emergency light control and battery charging system utilizes a temperature compensated switched voltage regulator for charging the battery. Energization of the emergency light is effected through a field effect transistor which is turned on through a voltage doubler circuit enabled when there is a failure in the power supply. The system is arranged with a latch that insures that the light is not turned on when the battery is connected until after line power is initially applied. A low battery voltage detector insures that the battery is protected from a deep cycle discharge if line voltage is not restored.

REFERENCES:
patent: 3341764 (1967-09-01), Kongable
patent: 4150302 (1979-04-01), Roche
patent: 4223232 (1980-09-01), Bulat
patent: 4240022 (1980-12-01), Kilinskis et al.
patent: 4323820 (1982-04-01), Teich
patent: 4388534 (1983-06-01), Love et al.
patent: 4712055 (1987-12-01), Houser, Jr.

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