Apparatus for measuring high temperature and pressure utilizing thermocouples

Claim 1

APPARATUS FOR MEASURING AND TESTING COMPRISING A FIRST BODY OF MATERIAL HAVING A SOLID-STATE PHASE TRANSFORMATION AT ELEVATED TEMPERATURE AND PRESSURE, A SECOND BODY DISPOSED ADJACENT TO THE SAID FIRST BODY AND HAVING A SOLID-STATE PHASE TRANSFORMATION UNDER DIFFERENT TEMPERATURE AND PRESSURE CONDITIONS, MEANS FOR SUBJECTING THE SAID BODIES TO CONDITIONS CAUSING A SOLID-STATE PHASE TRANSFORMATION TO OCCUR IN A PORTION OF THE FIRST BODY AND TO PROGRESS THRU SAID FIRST BODY, AND MEANS FOR DETECTING PROGRESSION OF THE PHASE TRANSFORMATION THRU THE FIRST BODY, SAID DETECTING MEANS INCLUDING THERMOCOUPLE MEANS COMPRISING A FIRST THERMOCOUPLE JUNCTION AND A SECOND THERMOCOUPLE JUNCTION DISPOSED ADJACENT TO PORTIONS OF THE RESPECTIVE BODIES AND POTENTIOMETER MEANS ELECTRICALLY CONNECTED TO THE THERMOCOUPLE MEANS FOR INDICATING DIFFERENCE TEMPERATURE CHANGES AT THE FIRST THERMOCOUPLE JUNCTION DURING SOLID-STATE PHASE TRANSFORMATIONS OF THE FIRST BODY.