Patent ID: 6639190
Filing Date: 2003-10-28
Classification: A47J,F23N,F24C,H05B

Abstract:
A heat alert safety device attachable to hot surfaces including hot metal surfaces, hot glass surfaces and other hot surfaces, for warning individuals that the surface is hot, comprising:a liquid crystal composition, a container for housing the liquid crystal composition, said container being transparent at least in a portion of the container covering the liquid crystal composition and being made of heat conductive material, the liquid crystal composition shaped to convey an outline of the letters â€œHOTâ€ , embedded in a flat face of the container and designed to turn red and remain red whenever the temperature of the hot surface exceeds a specified temperature, an attachment element made of a heat conductive material, said attachment element being attachable to the hot surface so as to allow the letters â€œHOTâ€  to be visible and said attachment element being removable from the hot surface to attach the device to a different hot surface or a different part of the hot surface, the attachment element being able to withstand surface temperatures of at least 300 degrees Fahrenheit.