Inspection device for fluid filled electrical apparatus

Claim 1

AN OIL FILLED ELECTRICAL SWITCH, HAVING A MEANS FOR INSPECTING A TERMINAL TO DETERMINE THE ELECTRICAL STATE THEREOF THAT COMPRISES A HOLLOW SWITCH CASING; A BODY OF DIELECTRIC INSULATING OIL DISPOSED INSIDE SAID CASING; A SWITCH ASSEMBLY HAVING ALL OF ITS ELECTRICAL JUNCTION ESTABLISHING MEANS IMMERSED IN SAID OIL, AND HAVING ON THE OUTSIDE OF SAID CASING, MEANS FOR SELECTIVELY CHANGING THE POSITION OF THE JUNCTION ESTABLISHING MEANS; CABLE TERMINATION MEANS SEALABLY LEADING A CONDUCTOR THROUGH THE CASING TO A TERMINAL IMMERSED IN SAID BODY OF OIL; GUIDE MEANS EXTENDING FROM A POINT ADJACENT SAID TERMINAL, THROUGH SAID BODY OF OIL, AND THROUGH SAID CASING TO OUTSIDE SAID CASING FOR GUIDING A PROBE INSERTED FROM OUTSIDE CASING INTO ELECTRICAL CONTACT WITH SAID TERMINAL, SAID PROBE ESTABLISHING AN ELECTRICAL CIRCUIT SEPARATE FROM THE NORMAL CURRENT CIRCUITS OF SAID SWITCH ASSEMBLY, SAID GUIDE MEANS BEING AT LEAST PARTIALLY FILLED WITH SAID OIL; AND PROBE ENGAGING MEANS SECURED TO SAID TERMINAL FOR MATINGLY ENGAGING THE END OF A PROBE THEREBY TO ESTABLISH AN ELECTRICAL JUNCTION.