Hot line indicator using a capacitive probe whose output controls switching circuit mans for an oscillator output circuit

Claim 1

AN ALTERNATING CURRENT VOLTAGE POTENTIAL TESTER CIRCUIT FREE FROM EXTERNAL CONDUCTOR CONNECTION COMPRISING A CAPACITIVE PROBE ADAPTED FOR PLACEMENT IN THE ELECTROSTATIC FIELD OF A CONDUCTOR UNDER TEST AND SPACED THEREFROM, SAID PROBE BEING CONNECTED THROUGH A CAPACITOR TO A TRANSISTOR AMPLIFIER WHOSE OUTPUT IS CONNECTED TO A TRANSFORMER PRIMARY, THE SECONDARY THEREOF HAVING ONE END CONNECTED THROUGH A HALF WAVE DIODE TO THE BASE OF A FIRST TRANSISTORT AND THE OTHER END CONNECTED TO THE POSITIVE SIDE OF A BATTERY, THE EMITTER OF SAID FIRST TRANSISTOR BEING CONNECTED TO THE POSITIVE SIDE OF THE SAID BATTERY AND THROUGH A CAPACITOR TO THE EMITTER OF A SECOND TRANSITOR, A DIRECT CONNECTION BETWEEN THE COLLECTOR OF THE FIRST TRANSISTOR AND THE EMITTER OF THE SECOND TRANSITOR, A SPEAKER HAVING A TRANSFORMER PRIMARY WITH ONE END CONNECTED THROUGH A RESISTOR AND CAPACITOR IN PARALLEL WITH THE BASE OF SAID SECOND TRANSISTOR AND THE OTHER END CONNECTED TO THE COLLECTOR OF SAID CONTROL TRANSISTOR, A RESISTOR LOAD CONNECTED BETWEEN THE EMITTER AND COLLECTOR OF SAID SECOND TRANSISTOR, AND A CONDUCTOR LEADING FROM A TAP ON SAID SPEAKER TRANSFORMER PRIMARY BACK TO THE NEGATIVE SIDE OF SAID BATTERY, WHEREBY INPUT SIGNALS PICKED UP BY THE PROBE CAUSE SAID SPEAKER TO BE ACTIVATED AT THE FREQUENCY OF SAID INPUT SIGNAL TO INDICATE THE PRESENCE OF POTENTIAL IN SAID CONDUCTOR UNDER TEST.