Safetted ordnace device

Claim 1

AN AUTOMATICALLY SAFETIED ORDNANCE DEVICE COMPRISING: AN EXPLOSIVE CHARGE; AN EXPLODABLE BRIDGEWIRE ADAPTED TO EXPLODE THE CHARGE AND HAVING A PAIR OF TERMINALS; A PAIR OF ELECTRODES, ONE OF WHICH IS CONDUCTIVELY CONNECTED TO EACH OF SAID TERMINALS; AND A BODY OF CONDUCTIVE PLASTIC MATERIAL IN SERIES CONNECTION WITH ONE OF SAID ELECTRODES, WHEREBY A SERIES ELECTRICAL CIRCUIT CAN BE COMPLETED THROUGH THE BODY, AN ELECTRODE, THE BRIDGEWIRE, AND THE OTHER ELECTRODE, THE MATERIAL COMPRISING THE BODY HAVING A FIRST AND A SECOND STABLE STATE OF ELECTRICAL RESISTANCE CONSTITUTING A RELATIVELY HIGHER AND A RELATIVELY LOWER RESISTANCE, CONVERSION TO SAID FIRST STABLE STATE WHEN THE BODY IS INITIALLY IN SAID SECOND STABLE STATE BEING CAUSED BY PASSAGE THERETHROUGH OF A CURRENT OF SUFFICIENT MAGNITUDE TO ACCOMPLISH THE CHANGE, AND CONVERSION TO SAID SECOND STABLE STATE WHEN THE BODY IS INITIALY IN SAID FIRST STABLE STATE BEING CAUSED BY APPLYING A VOLTAGE ACROSS THE TERMINALS OF THE BODY OF SUFFICIENT MAGNITUDE TO ACCOMPLISH THE CHANGE, SAID STATES BEING ATTAINABLE FROM THE OTHER WITHOUT DEGRADATION OF THE ABILITY TO RETURN TO THE FORMER STATE, THE MAGNITUDE OF CURRENT PASSED TO THE BRIDGEWIRE IN THE COURSE OF EITHER CONVERSION BEING INSUFFICIENT TO EXPLODE THE BRIDGEWIRE.