Electrical protective circuit

Claim 1

AN ELECTRICAL PROTECTIVE CIRCUIT COMPRISING: (A) A MAIN CURRENT CONTROL CONTROL DEVICE A FIRST CONDITION IN WHICH IT IS CONDUCTIVE IN A FIRST DIRECTION AND A SECOND CONDITION IN WHICH IT IS SUBSTANTIALLY NONCONDUCTIVE IN SAID FIRST DIRECTION, SAID DEVICE BEING CAPABLE OF BEING CHANGED FROM SAID FIRST CONDITION TO SAID SECOND CONDITION BY REDUCING CURRENT THERETHROUGH IN SAID FIRST DIRECTION TO ZERO, (B) A CURRENT LIMITING DEVICE CONNECTED IN SERIES WITH SAID MAIN CURRENT CONTROL DEVICE SAID CURRENT LIMITING DEVICE HAVING A RELATIVELY LOW RESISTANCE NORMALLY AND CHANGING SUDDENLY TO RELATIVELY HIGH RESISTANCE UPON THE OCCURRENCE OF PREDETERMINED CURRENT CONDITIONS THERETHROUGH WITHOUT PERMANENTLY INTERRUPTING CURRENT THERETHROUGH, SAID CHANGE OF RESISTANCE OF SAID CURRENT LIMITING DEVICE OCCURRING AT A RATE OF SPEED INDEPENDENT OF THE RATE OF RISE OF CURRENT THERETHROUGH AT THE TIME, (C) ELECTRICAL CHARGE STORAGE MEANS, (D) MEANS CONNECTING SAID CHARGE STORAGE MEANS TO SAID MAIN CURRENT CONTROL DEVICE, SAID CONNECTING MEANS INCLUDING A SECOND CURRENT CONTROL DEVICE, SAID SECOND CURRENT CONTROL DEVICE HAVING A FIRST CONDITION IN WHICH IT IS SUBSTANTIALLY NON-CONDUCTIVE IN A FIRST DIRECTION AND A SECOND CONDITION IN WHICH IT IS CONDUCTIVE IN SAID FIRST DIRECTION, (E) MEANS CONNECTING SAID CURRENT LIMITING DEVICE TO SAID SECOND CURRENT CONTROL DEVICE WHEREBY THE CHANGE OF SAID CURRENT LIMITING DEVICE FROM SAID RELATIVELY LOW RESISTANCE TO SAID RELATIVELY HIGH RESISTANCE CONDITION CAUSES SAID SECOND CONTROL DEVICE TO CHANGE FROM SAID FIRST, NON-CONDUCTIVE, CONDITION TO SAID SECOND, CONDUCTIVE, CONDITION AND TO APPLY THE CHARGE OF SAID CHARGE STORAGE MEANS TO SAID FIRST CONTROL DEVICE IN SUCH A SENSE AS TO REDUCE THE CURRENT THROUGH SAID FIRST CONTROL DEVICE TO ZERO AND TO THEREBY CHANGE SAID FIRST CONTROL DEVICE FROM SAID FIRST, CONDUCTIVE, CONDITION TO SAID SECOND, NON-CONDUCTIVE CONDITION.