Patent ID: 8342252

Claim:
An automatic fire extinguisher, consisting of: a generally bulbous closed metal container having a flat top, an upper portion in the shape of a frustum of a cone, a hemispherical shaped bottom portion consisting of a hemispherical shaped weight having a flat upper surface disposed within said hemispherical bottom portion for balancing and positioning said automatic fire extinguisher in an upright position; a quantity of fire extinguishing fluid disposed in said bottom portion of said bulbous closed container and extending upwardly into the upper portion thereof; a closeable opening in said upper portion of said closed container for filling and refilling said closed container with liquid fire extinguishing fluid; means for pressurizing said closed container after filling or refilling said closed container with liquid fire extinguishing fluid; a tubular member having an upper portion and a lower portion with said upper portion extending through said top of said closed container and a lower portion of said tubular member extending downwardly into said lower portion of said closed container and into said fire extinguishing fluid; a spray nozzle and a heat activatible mercury valve closing said tubular member until activated by a temperature in excess of 68° C. (155° F.) and thereafter dispensing said fire extinguishing fluid through said top of said container and said spray nozzle into or onto a fire; and said bulb shaped closed metal container is coated with a heat resistant paint that will resist temperatures of up to 1500° C.