Pressure transducer for use in extreme temperature and radioactive environments

Claim 1

A PRESSURE TRANSDUCER FOR PROVIDING AN ELECTRICAL SIGNAL PROPORTIONAL TO THE DIFFERENCE BETWEEN THE PRESSURES OF TWO FLUIDS OVER AN EXTENDED TEMPERATURE RANGE, SAID TRANSDUCER INCLUDING: A PRESSURE-SENSITIVE DIAPHRAGM HAVING AN ANNULAR PERIPHERY AND A FLEXIBLE CENTER PORTION RESILIENTLY DEFLECTABLE THROUGH A DISTANCE PROPORTIONAL TO THE PRESSURE DIFFERENTIAL ACROSS THE DIAPHRAGM, A PAIR OF HOUSING DISPOSED ON THE OPPOSITE SIDES OF THE DIAPHRAGM AND HERMETICALLY SEALED TO THE PERIPHERY OF THE DIAPHRAGM TO FORM FIRST AND SECOND COMPARTMENTS, AT LEAST ONE OF SAID HOUSINGS INCLUDING A PORTION THAT ENCLOSES AN EXTENSION OF ONE OF THE COMPARTMENTS, MEANS FOR INTERCONNECTING THE COMPARTMENTS WITH SAID FLUIDS WHEREBY THE DIAPHRAGM WILL HAVE A FORCE THEREON PROPORTIONAL TO THE DIFFERENCE BETWEEN THE PRESSURES WHEREBY THE CENTER PORTION OF THE DIAPHRAGM WILL BE DISPLACED RELATIVE TO SAID EXTENSION PROPORTIONAL TO THE PRESSURE DIFFERENTIAL, A MAGNETIC CORE DISPOSED IN SAID EXTENSION AND INTERCONNECTED WITH SAID DIAPHRAGM SO AS TO MOVE THEREWITH, A PAIR OF DIFFERENTIAL WINDINGS ON SAID EXTENSION, SAID WINDINGS BEING INDUCTIVELY COUPLED TO THE CORE SO AS TO BE RESPONSIVE TO THE POSITION OF THE CORE, AND MEANS CONNECTED TO THE PAIR OF DIFFERENTIAL WINDINGS FOR COMPENSATING FOR ANY CHANGES IN THE CHARACTERISTICS OF THE WINDINGS AND THE DIAPHRAGM AND THE CORE THROUGH THE EXTENDED TEMPERATURE RANGE.