Overload protection circuit

Claim 1

IN AN OVERLOAD PROTECTIVE CIRCUIT FOR A CURRENT CARRYING LINE; AT LEAST TWO OVERLOAD PROTECTIVE TRANSISTORS EACH HAVING AN ON STAGE AND AN OFF STATE; MEANS SERIALLY COUPLING THE PROTECTIVE TRANSISTORS TO THE LINE; CIRCUIT MEANS FOR EACH PROTECTIVE TRANSISTOR BIASING THE CORRESPONDING TRANSISTOR TO ITS ON STAGE; A CIRCUIT RESPONSIVE TO THE INTENSITY OF CURRENT IN THE LINE FOR COUNTERACTING THE BIASING CIRCUT OF ONE OF THE PROTECTIVE TRANSISTORS FOR SWITCHING SAID ONE PROTECTIVE TRANSISTOR TO ITS OFF STAGE; IMPEDANCE MEANS SHUNTING SAID ONE PROTECTIVE TRANSISTOR; MEANS RESPONSIVE TO INCREASE IN LEVEL OF CURRENT IN THE SHUNTING IMPEDANCE MEANS CORRESPONDING TO LINE OVERLOAD, FOR COUNTERACTING THE BIASING CIRCUIT OF THE SECOND PROTECTIVE TRANSISTOR FOR SWITCHING IT OFF; AND A RELAY HAVING A COIL NORMALLY PARALLELING SAID PROTECTIVE TRANSITORS FOR ENERGIZATION WHEN SAID PROTECTIVE TRANSISTORS ASSUME THEIR OFF STATES, SAID RELAY HAVING CONTACT MEANS FOR DISCONNECTING THE SHUNTING IMPEDANCE MEANS WHEN THE RELAY OPERATES.