High voltage test probe containing a part gas, part liquid dielectric fluid under pressure and having a transparent housing section for viewing the presence of the liquid therein

Claim 1

AN ELECTRICAL PROBE, COMPRISING: A HOLLOW CONTAINER MEMBER OF ELECTRICAL INSULATING MATERIAL; PROBE TIP MEMBER OF ELECTRICAL CONDUCTING MATERIAL EXTENDING THROUGH A FLUID-TIGHT SEAL IN SAID CONTAINER MEMBER FROM THE OUTSIDE TO THE INSIDE OF SAID CONTAINER MEMBER; A TUBULAR SHIELD MEMBER OF ELECTRICAL CONDUCTING MATERIAL POSITIONED AROUND SAID CONTAINER MEMBER AND ELECTRICALLY INSULATED FROM SAID PROBE TIP MEMBER BY SAID CONTAINER MEMBER; AN IMPEDANCE INCLUDING A RESISTANCE AND A CAPACITANCE SUPPORTED INSIDE SAID CONTAINER MEMBER WITH SAID RESISTANCE HAVING ITS INPUT END CONNECTED TO SAID PROBE TIP MEMBER, SAID CAPACITANCE BEING FORMED BY A PAIR OF CAPACITOR TERMINAL MEMBERS POSITIONED ON OPPOSITE SIDES OF THE RESISTANCE AND EXTENDING ALONG SAID RESISTANCE SO THAT THE SPACING BETWEEN SAID TERMINAL MEMBERS AND SAID RESISTANCE DECREASES WITH DISTANCE FROM THE INPUT END TO THE OUTPUT END OF SAID RESISTANCE TO PROVIDE A CAPACITANCE WHICH INCREASES WITH SAID DISTANCE; AND A TRANSMISSION LINE CONNECTOR INCLUDING A SIGNAL CONDUCTOR CONNECTED TO THE OUTPUT END OF SAID RESISTANCE AND A SHIELD CONDUCTOR CONNECTED TO SAID SHIELD MEMBER.