Warning signal circuit for an alternator

Claim 1

IN AN AUTOMOTIVE ELECTRICAL GENERATING SYSTEM THE COMBINATION COMPRISING, AN ALTERNATOR INCLUDING A RECTIFIER, SAID RECTIFIER COMPRISING A PLURALITY OF SILICON DIODES, THE OUTPUT TERMINALS OF SAID RECTIFIER COMPRISING THE OUTPUT TERMINALS OF SAID ALTERNATOR, AN ELECTRICAL STORAGE BATTERY CONNECTED ACROSS THE OUTPUT TERMINALS OF SAID ALTERNATOR, SAID SILICON DIODES BLOCKING CURRENT FLOW FROM SAID STORAGE BATTERY TO SAID ALTERNATOR WHEN THE OUTPUT VOLTAGE OF SAID ALTERNATOR IS BELOW THE TERMINAL VOLTAGE OF SAID BATTERY, SAID ALTERNATOR HAVING A FIELD WINDING, A VOLTAGE LIMITER CONNECTED TO THE OUTPUT TERMINALS OF SAID ALTERNATOR AND TO SAID FIELD WINDING FOR CONTROLLING THE ENERGIZATION OF SAID FIELD WINDING IN RESPONSE TO THE OUTPUT VOLTAGE OF SAID ALTERNATOR, SAID VOLTAGE LIMITER INCLUDING A RESISTOR THAT IS ENERGIZED AT LEAST PERIODICALLY WHEN THE OUTPUT VOLTAGE OF SAID ALTERNAOTR EXCEEDS A PRESELECTED VALUE THAT IS AT LEAST BATTERY, AN ALTERNATOR WARNING LAMP CONNECTED STORAGE BATTERY, AN ALTERNATOR WARNING LAMP CONNECTED ACROSS SAID ELECTRICAL STORAGE BATTERY, SAID ALTERNATOR WARNING LAMP BEING ENERGIZED WHEN THE OUTPUT VOLTAGE OF SAID ALTERNATOR IS BELOW SAID PRESELECTED VALUE, AND A BIMETAL SWITCH CONNECTED IN SERIES WITH SAID ALTERNATOR WARNING LAMP AND SAID ELECTRICAL STORAGE BATTERY, SAID BIMETAL SWITCH BEING POSITIONED ADJACENT TO AND BEING ADAPTED TO OPEN IN RESPONSE TO THE HEAT DEVELOPED BY SAID RESISTOR WHEREBY SAID ALTERNATOR WARNING LAMP IS EXTINGUISHED WHEN THE OUTPUT VOLTAGE OF SAID ALTERNATOR EXCEEDS SAID PRESELECTED VALUE.