Conductometric corrosion test probe with replaceable probe insert

Claim 1

A CORROSION TEST PROBE ASSEMBLY HAVING A REPLACEABLE PROBE INSERT WHICH COMPRISES A BODY MEMBER ADAPTED FOR CONNECTION TO A PORT OF A VESSEL EXPERIENCING CORROSION, SAID BODY MEMBER HAVING A BORE THERETHROUGH, THE BORE HAVING A FIRST AND A SECOND ANNULAR PORTION OF ENLARGED DIAMETER NEAR THE END OUTSIDE OF SAID VESSEL, A TAPERED TRANSITION SURFACE BETWEEN SAID FIRST AND SAID SECOND ANNULAR PORTIONS, A REPLACEABLE LEAD WIRE-CARRYING TUBULAR PROBE INSERT HAVING A SHOULDER PORTION RECEIVED IN SAID BORE, SAID REPLACEABLE PROBE INSERT CARRYING AN EXPENDABLE CORROSION TEST SPECIMEN AND ELECTRICAL LEAD WIRES CONNECTING THERETO, ANNULAR GASKET MEANS BETWEEN THE SHOULDER PORTION OF SAID REPLACEABLE PROBE INSERT AND A CORRESPONDING SHOULDER IN THE BORE OF THE BODY MEMBER, AN INCOMPRESSIBLE CYLINDER WITHIN SAID REPLACEABLE PROBE INSERT ADAPTED TO TRANSMIT COMPRESSION FORCE TO SAID GASKET MEANS UPON APPLICATION OF PRESSURE TO SAID INCOMPRESSIBLE CYLINDER, A DEFORMABLE PLUG IN THE BORE HAVING A PORTION THEREOF CONFORMING TO THE TAPERED TRANSITION SURFACE BETWEEN SAID FIRST AND SAID SECOND ANNULAR PORTIONS OF INCREASED DIAMETER OF SAID BORE AND HAVING INDIVIDUAL APERTURES FOR EACH OF SAID LEAD WIRES, AN ANNULAR FOLLOWER NUT THREADABLY CONNECTED TO A SIMILAR THREADED PORTION OF SAID BODY MEMBER AND ENGAGING SAID FOLLOWER MEANS, SAID FOLLOWER NUT BEING ADAPTED TO COMPRESS SAID DEFORMABLE PLUG INTO SEALING RELATIONSHIP WITH SAID TAPERED TRANSITION SURFACE AND SAID LEAD WIRES UPON TIGHTENING SAID ANNULAR FOLLOWER NUT.