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US 7,118,244 B2Granted
Emergency light
OwnerJohn D. Kurtzinventor
Life of this patent
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Abstract
An emergency light source comprising a housing and an energizing circuit selectively operatively coupling LEDs to a battery power source is provided for lighting a selected area to provide at least twenty-four hours of continuous light when energized. The emergency light source is activated by an activator having at least one of a manual activator and at least one light detector detecting a predetermined reduction in ambient light, wherein the activator is operatively coupled to the energizing circuit and causes the energizing circuit to operatively couple the battery power source and the LEDs.
Claims22
An emergency light source comprising:
- a housing;
- at least one LED carried by said housing and performing an emergency lighting function in a selected area when energized;
- a battery power source carried by said housing selected to energize said at least one LED to provide at least twenty-four hours of continuous light;
- an energizing circuit carried by said housing selectively operatively coupling said at least one LED with said battery power source to energize said at least one LED;
- and
- an activator carried by said housing and comprising at least one of a manual activator and at least one light detector detecting a predetermined reduction in ambient light, said activator being operatively coupled to said energizing circuit to cause said energizing circuit to operatively couple said battery power source and said at least one LED;
- wherein the energizing circuit draws a current that gradually decreases with time while operatively coupling said battery power source and said at least one LED.
4 more elements
Dependencies are inferred from the claim text.