Exit sign self-testing system

Details Exit sign self-testing system Exit sign self-testing system

1998-03-19

1999-10-12

Hofsass, Jeffery A.

Communications: electrical

Systems

In and out indicators

340333, 340506, 340507, 340514, 340516, 340636, 307 64, 362 20, 315 86, G08B 300

Patent

active

059660694

ABSTRACT:
A system for testing the electrical integrity of an illuminated exit sign alternately powered by a battery, rechargeable from a source of alternating current power. The system includes an alarm for indicating an electrical failure, precluding the illumination of the exit sign. A circuit tests the presence of battery electrical power for illuminating the exit sign. In addition, the circuitry periodically tests for the provision of adequate battery power to achieve the same function. Moreover, the system periodically tests and retests for adequate recharging of the battery during a preselected period of time and includes an alarm for indicating failure of the recharging system.

REFERENCES:
patent: 3384886 (1968-05-01), Serra
patent: 4088986 (1978-05-01), Boucher
patent: 4199754 (1980-04-01), Johnson et al.
patent: 4441066 (1984-04-01), Burmenko
patent: 4544910 (1985-10-01), Hoberman
patent: 4799039 (1989-01-01), Balcom et al.
patent: 4965548 (1990-10-01), Fayfield
patent: 5621394 (1997-04-01), Barrick et al.

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