Electronic voltage regulator with output transistor biased by isolation diode

Claim 1

A VOLTAGE REGULATOR FOR USE IN A VEHICULAR ELECTRICAL SYSTEM WHICH INCORPORATES A VOLTAGE PRODUCING WITH AN EXCITATION WINDIONG THEREIN AND WHICH FURTHER INCORPORATES AN ISOLATION DIODE CONNECTING THE VOLTAGE PRODUCING DEVICE IN SERIES WITH A STORAGE BATTERY, SAID VOLTAGE REGULATOR INCLUDING IN COMBINATION, A FIRST OUTPUT TRANSISTOR HAVING BASE, EMITTER AND COLLECTOR PORTIONS, SAID EMITTER AND COLLECTOR PORTIONS THEREOF BEING ADAPTED FOR CONNECTION IN SERIES BETWEEN THE OUTPUT OF THE VOLTAGE PRODUCING DEVICE AND THE EXCITATION WINDING THEREOF, A VOLTAGE SENSING CIRCUIT INCLUDING A SECOND CONTROL TRANSISTOR CONNECTED TO SAID BASE PORTION OF SAID OUTPUT TRANSISTOR AND PROVIDING CUT OF BIAS THEREOF WHEN THE VOLTAGE AT THE OUTPUT OF THE VOLTAGE PRODUCING DEVICE EXCEEDS A PREDETERMINED LEVEL, AND CONDUCTOR MEANS FOR CONNECTING SAID BASE AND EMITTER PORTIONS OF SAID OUPUTS TRANSISTOR ACROSS THE ISOLATION DIODE AND FORMING A SERIES CONNECTION BETWEEN THE VOLTAGE PRODUCING DEVICE AND THE STORAGE BATTERY, SO THAT THE VOLTAGE DROP ACROSS THE ISOLATION DIODE ACTS TO FORWARD BIAS SAID OUTPUT TRANSISTOR.