Method and apparatus for calibrating thermometers

Abstract

A calibration device allows accurate and consistent creation of ice baths and aids in the calibration of food safety thermometers. Such devices include a calibration wrench on a cup lid for holding and calibrating a thermometer, a stem thermometer access hole on the cup lid, an insulated cup for holding a substance to be measured, and a liquid crystal reversible temperature label on the cup.

1 . A cup comprising:
 a cup body;   a lid fitting on the cup body, the lid having one or more calibration wrenches, the calibration wrenches each including at least one protrusion or recess, the at least one protrusion or recess adapted to contain a nut of a thermometer; and   an access hole formed through the lid at a location of each of the one or more calibration wrenches.   
     
     
         2 . The cup of  claim 1 , wherein the one or more calibration wrenches includes a first angled member disposed opposite a second angled member, the first and second angled members adapted to retain the nut of the thermometer. 
     
     
         3 . The cup of  claim 1 , wherein the one or more calibration wrenches includes a first hexagonal recess. 
     
     
         4 . The cup of  claim 3 , wherein the one or more calibration wrenches includes a second hexagonal recess, wherein the first hexagonal recess is formed on a first side of the lid and the second hexagonal recess is formed on a second side of the lid, coaxial with the first hexagonal recess. 
     
     
         5 . The cup of  claim 1 , further comprising an inner vessel fitting inside the cup body. 
     
     
         6 . The cup of  claim 5 , wherein the inner vessel is sealed to the cup body with a gap formed therebetween. 
     
     
         7 . The cup of  claim 6 , wherein the gap includes an insulating material. 
     
     
         8 . A cup comprising:
 an exterior cup body;   an inner vessel disposed inside the exterior cup body;   a lid adapted to fit about a perimeter of the exterior cup body;   one or more calibration wrenches disposed in the lid, the calibration wrenches each including at least one protrusion or recess, the at least one protrusion or recess adapted to contain a nut of a thermometer; and   an access hole formed through the lid at a central location of each of the one or more calibration wrenches.   
     
     
         9 . The cup of  claim 8 , wherein the one or more calibration wrenches includes a first angled member disposed opposite a second angled member, the first and second angled members adapted to retain the nut of the thermometer. 
     
     
         10 . The cup of  claim 8 , wherein the one or more calibration wrenches includes a first hexagonal recess and a second hexagonal recess, wherein the first hexagonal recess is formed on a first side of the lid and the second hexagonal recess is formed on a second side of the lid, coaxial with the first hexagonal recess.