COMBINATION VISIBLE LIGHT DETECTOR AND ULTRAVIOLET DETECTOR COACTING AS A FIRE DISCRIMINATION SYSTEM

摘要

A combination visible light and ultraviolet flame detector is provided wherein a broad band solar cell senses the presence of a visible light source in a surveyed area, and a coacting ultraviolet detector confirms or negates the presence of any ultraviolet component in the visible light, thereby indicating whether the response signifies occurrence of fire, explosion, or merely a false alarm.