Temperature sensor adaptor for measuring the temperature of a spark plug

A removable temperature sensor adaptor in which a thermocouple is embedded in an adaptor means to make thermal contact with a spark plug of the type having a metal body portion with a hexangular wall section;

• said adaptor means having a cylindrical body, a top with an aperture to fit on the spark plug on one end of said cylindrical body, said cylindrical body being open at its other end, said cylindrical body having a cavity, where said cavity is surrounded by a plurality of walls having a hexangular shape adapted to removably mate with the hexangular wall section of the spark plug;
• a spark plug contact point in one of said walls of said cavity, said thermocouple being embedded in an aperture in said spark plug contact point to sense the temperature of the spark plug at said spark plug contact point, said thermocouple being supported on said adaptor means by a metal spring ring which encircles said cylindrical body, said thermocouple being further supported by a vertical post means extending from said metal spring ring, said cylindrical body having a circumferential groove to receive said metal spring ring, and wherein said vertical post means has a sleeve means for fastening said thermocouple to said vertical post means.