Short protector circuit

Claim 1

IN A DIRECT CURRENT POWER SUPPLY HAVING A LOAD CONNECTED TO A FIRST AND SECOND TERMINALS THEREOF, A CIRCUIT FOR PROTECTING SAID POWER SUPPLY FROM EXCESS CURRENT FLOW THERETHROUGH AS A RESULT OF AN ABNORMAL CURRENT DEMAND FROM SAID LOAD, SAID PROTECTING CIRCUIT COMPRISING: A ZERO IMPEDANCE DETECTING MEANS CONNECTED TO SAID FIRST TERMINAL OF SAID POWER SUPPLY; A SOURCE OF SENSING VOLTAGE HAVING A SUBSTANTIALLY CONSTANT MAGNITUDE WHICH IS LESS THAN THE MAGNITUDE OF THE VOLTAGE SUPPLIED BY SAID POWER SUPPLY DURING NORMAL OPERATING CONDITIONS; MEANS CONNECTING SAID SOURCE OF SENSING VOLTAGE TO SAID DETECTING MEANS, SAID DETECTING MEANS BEING OPERATIVE IN RESPONSE TO NORMAL OPERATION OF SAID POWER SUPPLY TO MAINTAIN SAID SOURCE OF SENSING VOLTAGE ELECTRICALLY INEFFECTIVE, SAID DETECTING MEANS BEING OPERATIVE IN RESPONSE TO AN ABNORMAL CURRENT DEMAND ON SAID POWER SUPPLY TO RENDER SAID SOURCE OF SENSING VOLTAGE ELECTRICALLY EFFECTIVE; PROTECTION MEANS CONNECTED TO SAID SECOND TERMINAL OF SAID POWER SUPPLY; AND MEANS CONNECTING SAID PROTECTION MEANS FO SAID SOURCE OF SENSING VOLTAGE, SAID PROTECTION MEANS BEING OPERATIVE ONLY IN RESPONSE TO THE ELECTRICAL EFFECTIVENESS OF SAID SENSING VOLTAGE SOURCE TO REMOVE SAID ABNORMAL CURRENT DEMAND FROM SAID POWER SUPPLY THEREBY TO PROTECT SAID POWER SUPPLY FROM SAID ABNORMAL CURRENT DEMAND, SAID PROTECTION MEANS FURTHER BEING OPERATIVE TO AUTOMATICALLY RESTORE SAID POWER SUPPLY AND LOAD TO NORMAL OPERATION IN RESPONSE TO SAID SOURCE OF SENSING POTENTIAL BECOMING ELECTRICALLY INEFFECTIVE.