Mounting device for reference cells in cathodic protection systems

Claim 1

IN A CATHODIC PROTECTION SYSTEM FOR SHIPS, THE HULL OF A SHIP, AN OPENING THROUGH THE HULL BELOW THE WATER LINE, A STUFFING BOX MOUNTED AXIALLY IN SAID OPENING TO FACE THE WATER, AN INSULATING CASING HAVING CONSTANT CROSS SECTIONAL DIMENSIONS, THE OPENING THROUGH SAID STUFFING BOX BEING AT ALL POINTS GREATER THAN THE CROSS SECTION OF SAID CASING, THE CASING FORMING THE CENTRALLY SEALED ELEMENT OF THE STUFFING BOX TO PERMIT EJECTION OF THE CASING INTO THE WATER AND INSERTION OF A NEW CASING FROM INSIDE THE SHIP FOLLOWING RELEASE OF THE STUFFING BOX PRESSURE, A REFERENCE HALF-CELL ELECTRODE BEING SECURRED IN AID CASING, STOP MEANS MOUNTED IN THE INNER WALL OF SAID JACKET FOR RELEASABLY SECURING SAID CASING AGAINST LONGITUDINAL MOVEMENT IN SAID JACKET, AND MEANS FOR CONNECTING THE REFERENCE HALF-CELL ELECTRODE TO THE CATHODIC PROTECTION SYSTEM.