Monitoring circuit for regulated power supply

Claim 1

A MONITORING CIRCUIT FOR INDICATING THE OPERATING MODE OF A REGULATED D.C. POWER SUPPLY WHICH INCLUDES A SOURCE OF UNREGULATED POTENTIAL; OUTPUT TERMINALS; A VARIABLE CONTROL MEANS COUPLING SAID SOURCE TO SAID OUTPUT TERMINALS; A VOLTAGE CONTROL CIRCUIT OPERATIVE IN ONE MODE OF THE POWER SUPPLY TO ADJUST SAID CONTROL MEANS TO ACHIEVE A PREDETERMINED VOLTAGE CHARACTERISTIC AT SAID OUTPUT TERMINALS; A CURRENT CONTROL CIRCUIT OPERATIVE IN THE OTHER MODE OF THE POWER SUPPLY TO ADJUST SAID CONTROL MEANS TO ACHIEVE A PREDETERMINED CURRENT CHARACTERISTIC AT SAID OUTPUT TERMINALS; AND CIRCUIT MEANS INTERCONNECTING SAID CURRENT CONTROL CIRCUIT AND SAID VOLTAGE CONTROL CIRCUIT TO AUTOMATICALLY SELECT THE MODE WHICH LIMITS, RESPECTIVELY, THE VOLTAGE AND CURRENT AT SAID OUTPUT TERMINALS IN ACCORDANCE WITH PRESELECTED SETTINGS; SAID MONITORING CIRCUIT COMPRISING A TRANSISTOR SO CONNECTED TO SAID CONTROL CIRCUITS THAT SAID TRANSISTOR IS RENDERED CONDUCTIVE WHEN THE POWER SUPPLY IS IN ONE MODE AND IS RENDERED NONCONDUCTIVE WHEN THE POWER SUPPLY IS IN THE OTHER MODE; AND AN ELECTRICAL INDICATING MEANS CONNECTABLE IN SERIES WITH SAID TRANSISTOR TO BE ENERGIZED WHEN SAID TRANSISTOR IS CONDUCTIVE AND TO THEREBY INDICATE THAT THE POWER SUPPLY IS IN ONE OF SAID OPERATING MODES, AND CONNECTABLE IN SHUNT RELATIONSHIP WITH SAID TRANSISTOR TO BE ENERGIZED WHEN SAID TRANSISTOR IS NONCONDUCTIVE TO THEREBY INDICATE THAT THE POWER SUPPLY IS IN THE OTHER OF SAID OPERATING MODES.