Circuit for controlling operation of an emergency exit lamp

Details Circuit for controlling operation of an emergency exit lamp Circuit for controlling operation of an emergency exit lamp

1999-01-19

2000-04-11

Wong, Don

Electric lamp and discharge devices: systems

Current and/or voltage regulation

315 86, 315171, 307 64, H05B 3700, G05F 100

Patent

active

060491787

ABSTRACT:
In a circuit for controlling operation of an emergency exit lamp, a delay circuit enables a trigger circuit a preset time period after a power outage has occurred. Once enabled, the trigger circuit activates a relay so as to connect a storage battery to an oscillator. The oscillator is thus enabled to generate a high voltage alternating current signal to activate the lamp to generate a light output in the event of a power outage.

REFERENCES:
patent: 5004953 (1991-04-01), McDonald
patent: 5015919 (1991-05-01), Vila-Masot et al.
patent: 5187413 (1993-02-01), Araki et al.
patent: 5811938 (1998-09-01), Rodriguez
patent: 5955843 (1999-09-01), Nuckolls et al.
patent: 5986407 (1999-11-01), Chang

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