Pressure transducer

Claim 1

A PRESSURE TRANSDUCER COMPRISING A DIELECTRIC CASING HAVING AN UPPER BODY PORTION, A LOWER BODY PORTION, A FLEXIBLE DIELECTRIC DIAPHRAGM CLAMPED BETWEEN THE UPPER AND LOWER BODY PORTIONS, SAID LOWER BODY PORTION HAVING AN ANNULAR FLUID PRESSURE CHAMBER THEREIN OPENING DOWNWARDLY, CLOSED AT ITS UPPER END BY A FIRST PORTION OF SAID DIAPHRAGM AND A PRESSURE FLUID INLET CONDUIT FROM THE EXTERIOR, OPENING INTO SAID FLUID PRESSURE CHAMBER, ADAPTED TO BE CONNECTED TO A FLUCTUATING FLUID PRESSURE, SAID LOWER BODY PORTION HAVING A SMALLER SPRING CHAMBER EXTENDING DOWNWARDLY THEREIN IN SPACED PARALLEL RELATION TO THE FLUID PRESSURE CHAMBER CLOSED AT ITS UPPER END BY A SECOND PORTION OF SAID FLEXIBLE DIELECTRIC DIAPHRAGM, COMPRESSION SPRING MEANS IN SAID SPRING CHAMBER YIELDABLY IMPINGING SAID SECOND DIAPHRAGM PORTION FOR URGING THE SAME UPWARDLY, SPRING ADJUSTING MEANS IN SAID LOWER BODY PORTION FOR ADJUSTING THE IMPINGING PRESSURE OF SAID SPRING MEANS AGAINST SAID SECOND DIAPHRAGM PORTION FOR DEFLECTING THE SAME UPWARDLY, SAID UPPER BODY PORTION HAVING AN ANNULAR ELECTRO-CONDUCTIVE LIQUID RECEIVING CHAMBER THEREIN EXTENDING UPWARDLY FROM AND CLOSED BY SAID FIRST DIAPHRAGM PORTION IN CONCENTRIC OPPOSED RELATION TO SAID FLUID PRESSURE CHAMBER, AN ELECTRIC CONTACT TERMINAL CONCENTRICALLY FIXED IN SAID ANNULAR ELECTROCONDUCTIVE LIQUID RECEIVING CHAMBER IN SPACED RELATION ABOVE SAID FIRST DIAPHRAGM PORTION, SAID UPPER BODY PORTION HAVING A SECOND SMALLER ELECTROCONDUCTIVE LIQUID RECEIVING CHAMBER THEREIN EXTENDING UPWARDLY FROM AND CLOSED BY SAID SECOND DIAPHRAGM PORTION, A SECOND ELECTRIC CONTACT TERMINAL ADJUSTABLY FIXED IN SAID SECOND ELECTROCONDUCTIVE LIQUID RECEIVING CHAMBER, EXTENDING DOWNWARDLY INTO PREDTERMINED SPACED RELATION ABOVE SAID SECOND DIAPHRAGM PORTION, SAID UPPER BODY PORTION HAVING AN ELECTROCONDUCTIVE LIQUID PASSAGE FORMED THEREIN EXTENDING BETWEEN SAID FIRST-MENTIONED ELECTROCONDUCTIVE LIQUID CHAMBER AND SAID SMALLER SECOND ELECTROCONDUCTIVE LIQUID CHAMBER IN PREDETERMINED CLOSELY SPACED RELATION TO SAID SECOND DIAPHRAGM PORTION ARRANGED TO BE INCREASED AND DECREASED IN CROSS-SECTIONAL AREA BY DOWNWARD AND UPWARD DEFLECTION OF SAID SECOND DIAPHRAGM PORTION BY MOVEMENT OF AN ELECTROCONDUCTIVE LIQUID WHEN CONTAINED IN SAID LIQUID CHAMBERS, FOR VARYING SAID CROSS-SECTIONAL AREA OF THE ELECTROCONDUCTIVE LIQUID BETWEEN SAID LIQUID CHAMBERS TO VARY THE ELECTRIC POTENTIAL BETWEEN SAID ELECTRIC CONTACT TERMINALS IN SAID ELECTROCONDUCTIVE LIQUID CHAMBERS.