Circuit for an emergency lighting and fire detector system

Details Circuit for an emergency lighting and fire detector system Circuit for an emergency lighting and fire detector system

1977-11-21

1980-04-22

Caldwell, Sr., John W.

Communications: electrical

Condition responsive indicating system

Specific condition

340332, 340333, 340509, 340584, 340627, G08B 1700, G08B 700

Patent

active

041997549

ABSTRACT:
A circuit for a home safety unit having an emergency light system for providing light in the event of a power failure or when a fire is detected, and a fire detection system for providing an audible alarm indicating the existence of a fire. The circuit includes a battery which is constantly being charged and a low voltage responsive system for indicating a low voltage condition on the battery. A latching system causes the emergency light to be turned off when this low voltage condition is reached, and to remain off until the battery is recharged.

REFERENCES:
patent: 3521276 (1970-07-01), Raber
patent: 3603973 (1971-09-01), Hough
patent: 3678489 (1972-07-01), Scherban et al.
patent: 3969720 (1976-07-01), Nishino
patent: 4004288 (1977-01-01), Webb, Jr.
patent: 4020479 (1977-04-01), Conforti et al.
patent: 4065759 (1977-12-01), Handing
patent: 4088986 (1978-05-01), Boucher
patent: 4093943 (1978-06-01), Knight
patent: 4148023 (1979-04-01), Elkin

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