Insulated seal for a rod movable in a wall

Claim 1

AN ELECTRICALLY INSULATED SEAL BETWEEN A METALLIC ROD AND A METALLIC CHAMBER WALL WHERE A FLUID PRESSURE DIFFERENTIAL EXISTS AT OPPOSITE FACES OF SAID WALL, AND SAID ROD PASSES THROUGH AND MOVES IN SAID WALL, WHICH COMPRISES SAID WALL HAVING A PASSAGE THERETHROUGH FROM FACE TO FACE, SAID ROD BEING MOVABLE IN SAID PASSAGE AND PASSING THROUGH SAID WALL WITH A CLOSE CLEARANCE, SAID WALL AT ONE END OF SAID PASSAGE HAVING THEREIN AN ENDLESS RABBET THAT FACES OUTWARDLY OF AND OPENS INTO THE PASSAGE, AN ENDLESS, APERTURED ELEMENT OF RESILIENT, ELECTRICALLY INSULATING MATERIAL DISPOSED IN SAID RABBET, ENCIRCLING SAID ROD, TIGHTLY ENGAGING THE ROD PERIPHERY AND THE PERIPHERAL WALL OF SAID RABBET WHILE FREE OF PRESSURE THEREIN IN A FACE TO FACE DIRECTION, FULLY SPACING SAID ROD FROM DIRECT CONTACT WITH SAID PASSAGE PERIPHERY, AND SEALING THE PASSAGE AGAINST MOVEMENT OF FLUID THROUGH IT ALONG SAID ROD, AND ELECTRICALLY INSULATING MEANS SECURED TO SAID WALL AND, EXTENDING OVER SAID RABBET, FOR CONFINING SAID ELEMENT IN SAID RABBET, AND LIMITING TRANSVERSE MOVEMENT OF THE SHAFT TO PREVENT DIRECT CONTACT OF SAID ROD WITH SAID WALL.