Excessive temperature warning device using warning symbol outside fiber optic cable or light guide
First Claim
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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Accused Products
Abstract
A device warns that a surface is temperature excessive. A light guide receiving light from a light source sufficiently distant from the surface to avoid becoming dangerously hot or cold is oriented so that the light guide is in the path of the light beam and transmits the light beam through the light guide to a point outside the light guide. The light source is controlled by a controller. A predetermined warning symbol typically outside the light guide is illuminated when the surface is dangerously temperature excessive because a sensor connected to the controller ascertains and transmits the surface temperature to the controller controlling the light source and an observer sees that the surface is temperature excessive. In certain embodiments, the light guide is flexible and/or its second end movable. The symbol can illuminate a border to warn against entry into an area in which the surface is located.
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Citations
52 Claims
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1. A heat alert safety device for warning individuals that a surface of an object is too hot or cold, comprising
a 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, and a sensor connected to the controller for ascertaining a surface temperature and communicating the surface temperature to the controller wherein the light source is at least four inches from the surface.
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27. A heat alert safety device for warning individuals that a surface of an object is too hot or cold, comprising
a light source that generates a light beam, a light guide receiving light from the light source and oriented so that the light guide is directly in a path of the light beam, said light guide transmitting the light beam through the light guide to a point outside the light guide, a predetermined warning symbol for temperature excessiveness 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 tat whenever a specified surface temperature is reached, the warning symbol is illuminated and remains illuminated as long as said specified surface temperature is maintained, and a sensor connected to the controller for ascertaining a surface temperature and communicating the surface temperature to the controller, wherein the light source is at least four inches from the surface.
Specification