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Excessive temperature warning device using warning symbol outside fiber optic cable or light guide

  • US 7,173,221 B2
  • Filed: 10/15/2004
  • Issued: 02/06/2007
  • Est. Priority Date: 05/28/2003
  • Status: Expired due to Fees
First Claim
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1. A heat alert safety device for warning individuals that a surface of an object is too hot or cold, comprisinga light source that generates a light beam,a fiber optic cable formed of a plurality of optical fibers, said fiber optic cable receiving light from the light source and oriented so that the plurality of fibers are directly in a path of the light beam, said fiber optic cable transmitting the light beam through the plurality of fibers to a point outside the fiber optic cable,a predetermined warning symbol for excessive temperature visible only when illuminated to an observer who can also readily see the surface, said symbol communicating that the surface is temperature excessive,a controller controlling the light source so that whenever a specified surface temperature is reached, the warning symbol is illuminated and remains illuminated as long as said specified surface temperature is maintained, anda sensor connected to the controller for ascertaining a surface temperature and communicating the surface temperature to the controllerwherein the light source is at least four inches from the surface.

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