Means including a test probe having a pair of inductively coupled windings for locating faults in conductors

Claim 1

MEANS FOR LOCATING FAULTS IN CONDUCTORS AND THE LIKE COMPRISING A FIRST SIGNAL SOURCE FOR GENERATING A CHARACTERISTIC SIGNAL ADAPTED TO BE CONNECTED TO A CONDUCTOR UNDER TEST, AND MEANS RESPONSIVE TO THE APPLICATION OF A SIGNAL INTO THE CONDUCTOR UNDER TEST BY THE FIRST SIGNAL SOURCE FOR INDICATING THE CONDITION OF THE CONDUCTOR UNDER TEST, SAID SIGNAL RESPONSIVE MEANS INCLUDING A TEST METER CIRCUIT AND A PROBE ADAPTED TO BE POSITIONED ADJACENT TO AND MOVABLE RELATIVE TO THE CONDUCTOR TO BE TESTED, SAID PROBE INCLUDING FIRST AND SECOND INDUCTIVELY COUPLED WINDINGS THE FIRST OF WHICH IS RESPONSIVE TO THE CHARACTERSTIC SIGNAL AND CONNECTED TO THE METER CIRCUIT, A SECOND SIGNAL SOURCE INCLUDING MEANS FOR CONNECTING SAID SECOND SIGNAL SOURCE TO THE SECOND INDUCTIVELY COUPLED TEST PROBE WINDING, AND MEANS FOR ADJUSTING SAID SECOND SIGNAL SOURCE TO MINIMIZE THE EFFECTS IN SAID FIRST TEST PROBE WINDING OF SIGNALS THAT MAY BE PRESENT IN THE CONDUCTOR DUE TO THE ENVIRONMENT IN WHICH THE CONDUCTOR IS SITUATED.