Power supply protection device

Claim 1

IN A VOLTAGE REGULATING DEVICE COMPRISING A LINE TRANSISTOR HAVING ITS EMITTER-COLLECTOR CIRCUIT IN A FIRST LINE FROM A FIRST SOURCE TO A LOAD, A BY-PASS TRANSISTOR OF THE SAME CONDUCTIVITY TYPE AS SAID LINE TRANSISTOR CONNECTED THROUGH A SECOND SOURCE TO A SECOND LINE FROM SAID FIRST SOURCE TO SAID LOAD, AND A SHAPING CIRCUIT CONNECTED TO THE BASE OF SAID LINE TRANSISTOR AND THE COLLECTOR OF SAID BYPASS TRANSISTOR AND ARRANGED TO PROVIDE SUBSTANTIALLY CONSTANT CURRENT OVER THE WORKING RANGE OF THE VOLTAGE REGULATING DEVICE, A SHAPING CIRCUIT COMPRISING FIRST AND SECOND TRANSISTORS OF THE OPPOSITE CONDUCTIVITY TYPE FROM SAID LINE AND BY-PASS TRANSISTORS, MEANS FOR CONNECTING THE COLLECTORS OF SAID FIRST AND SAID SECOND TRANSISTOR TOGETHER AND TO SAID BASE OF SAID LINE TRANSISTOR AND SAID COLLECTOR OF SAID BY-PASS TRANSISTOR, MEANS CONNECTING THE EMITTERS OF SAID FIRST AND SAID SECOND TRANSISTORS TOGETHER AND TO A RESISTOR NETWORK, MEANS CONNECTING SAID RESISTOR NETWORK BETWEEN SECOND AND THIRD TERMINALS, AND MEANS CONNECTING THE BASES OF SAID TRANSISTORS TOGETHER AND TO A TERMINAL CONNECTED TO SAID SECOND AND SAID THIRD TERMINAL.