Generator regulator with overload protection means

Claim 1

A REGULATOR ARRANGEMENT FOR A GENERATOR HAVING A SHUNT EXCITER WINDING AND BEING OPERABLE AT GREATLY VARYING SPEEDS, PARTICULARLY FOR A VEHICLE LIGHTING GENERATOR, COMPRISING, IN COMBINATION, CONTROL TRANSISTOR MEANS HAVING ITS EMITTER-COLLECTOR CIRCUIT CONNECTED IN SERIES WITH THE EXCITER WINDING BETWEEN THE TERMINALS OF THE GENERATOR FOR CONTROLLING THE ENERGIZATION OF SAID EXCITER WINDING DEPENDING UPON THE CONDUCTIVITY CONDITION OF SAID CONTROL TRANSISTOR MEANS; PILOT TRANSISTOR MEANS HAVING ITS EMITTERCOLLECTOR CIRCUIT CONNECTED BETWEEN SAID TERMINALS OF THE GENERATOR AND HAVING ITS COLLECTOR CONNECTED IN CIRCUIT WITH THE BASE OF SAID CONTROL TRANSISTOR MEANS FOR RENDERING THE LATTER NON-CONDUCTIVE WHEN SAID PILOT TRANSISTOR MEANS IS CONDUCTIVE, AND VICE VERSA, THE BASE OF SAID PILOT TRANSISTOR MEANS BEING SO CONNECTED WITH SAID TERMINALS OF THE THE GENERATOR THAT SAID PILOT TRANSISTOR MEANS IN NONCONDUCTIVE AS LONG AS THE OUTPUT POTENTIAL OF SAID GENERATOR IS BELOW A PREDETERMINED VALUE, AND IS RENDERED CONDUCTIVE WHEN SAID VALUE IS EXCEEDED; AND OVERLOAD PROTECTION MEANS COMPRISING RESISTOR MEANS AND THIRD TRANSISTOR MEANS CONNECTED BETWEEN SAID TERMINALS OF THE GENERATOR, SAID EMITTER-COLLECTOR CIRCUIT OF SAID CONTROL TRANSISTOR MEANS AND THE BASE OF SAID PILOT TANSISTOR MEANS FOR APPLYING TO THE LATTER, WHEN DURING CONDUCTIVE CONDITION OF SAID CONTROL TRANSISTOR MEANS BOTH THE COLLECTOR THEREOF AND THE COLLECTOR OF SAID PILOT TRANSISTOR MEANS ARE AT A NEGATIVE POTENTIAL OF COMPARATIVELY CONSIDERABLE MAGNITUDE, A POTENTIAL BY WHICH SAID PILOT TRANSISTOR MEANS IS RENDERED CORRESPONDINGLY CONDUCTIVE AND CONSEQUENTLY THE CONDUCTIVITY OF SAID CONTROL TRANSISTOR MEANS IS CORRESPONDINGLY REDUCED.