Emergency lighting apparatus and systems

Details Emergency lighting apparatus and systems Emergency lighting apparatus and systems

H - Electricity

05

B

315/22

H05B 41/46 (2006.01)

Patent

CA 1208692

EMERGENCY LIGHTING APPARATUS AND SYSTEMS Abstract of the Disclosure An emergency lighting unit having physical dimensions and electrical and electronic components and circuitry such that it can be directly substituted for a conventional hot cathode type fluorescent lamp in a conventional fluorescent lamp fixture which incorporates a rapid start type ballast. The emergency lighting unit comprises a direct current power supply in the form of rechargeable batteries, a light source in the form of one or more groups of low voltage high intensity miniature lamps, and electronic circuitry and components utilizing power supplied by the rapid start ballast for charging the batteries, monitoring their condi tion and reacting accordingly, and detecting the state of the normal alternating current power source and reacting accordingly. In a preferred embodiment, the emergency lighting unit utilizes pulses to detect the emergency or "FAIL" state of the system power. The pulses are supplied by a unique purser unit which is designed to be directly substituted for a standard wall switch.

443772

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