Supervisory system

Claim 1

AN AUTOMATIC PROTECTIVE CIRCUIT FOR DE-ENERGIZING AN ELECTRIC POWER CIRCUIT UPON THE APPEARANCE OF A LEAKAGE THEREFROM TO A RETURN PATH, COMPRISING IN COMBINATION: FIRST ELECTRICALLY EMERGIZABLE MEANS FOR DE-ENERGIZING SAID POWER CIRCUIT UPON ENERGIZATION OF SAID FIRST ELECTRICALLY ENERGIZABLE MEANS; A CIRCUIT INCLUDING SECOND ELECTRICALLY ENERGIZABLE MEANS ADAPTED FOR ENERGIZING SAID FIRST ELECTRICALLY ENERIGIZABLE MEANS WHEN SAID SECOND ELECTRICALLY ENERGIZABLE MEANS IS ENERGIZED; CONTINUOUSLY ENERGIZED INITIAL ENERGIZING MEANS CONNECTED TO PARTIALLY ENERGIZE SAID SECOND ELECTRICALLY ENERGIZABLE MEANS, SAID INITIAL ENERGIZING MEANS BEING REGULATED SO AS TO PROVIDE ENERGIZATION OF SAID SECOND ELECTRICALLY ENERGIZABLE MEANS OF A MAGNITUDE LESS THAN THAT REQUIRED TO EFFECT A RESPONSE THEREBY, SAID INITIAL ENERGIZING MEANS INCLUDING FIRST CIRCUITRY COMPRISING FIRST RECTIFYING MEANS CONNECTING SAID POWER CIRCUIT TO SAID SECOND ELECTRICALLY ENERGIZABLE MEANS SO THAT CURRENT FLOWS THROUGH SAID SECOND ELECTRICALLY ENERGIZABLE MEANS IN ONLY ONE DIRECTION; SECOND CIRCUITRY INCLUDING SECOND RECTIFYING MEANS CONNECTING SAID SECOND ELECTRICALLY ENERGIZABLE MEANS TO SAID RETURN PATH, SAID SECOND RECTIFYING MEANS BEING SO SENSED WITH RESPECT TO SAID FIRST RECTIFYING MEANS AS TO PROVIDE AN ARITHMETICAL ADDITION OF THE CURRENTS SUPPLIED THEREBY TO SAID SECOND ELECTRICALLY ENERGIZABLE MEANS; WHEREBY AN ELECTRICALLY CONDUCTIVE PATH APPEARING BETWEEN SAID POWER CIRCUIT AND SAID RETURN PATH WILL EFFECT FURTHER ENERGIZATION OF SAID SECOND ENERGIZABLE MEANS WHICH IN TURN WILL EFFECT ENERGIZATION OF SAID FIRST ELECTRICALLY ENERGIZABLE MEANS AND RESULT IN OPENING OF SAID POWER CIRCUIT.