Voltage and current responsive field winding current control

Claim 1

A COMBINED CURRENT AND VOLTAGE REGULATING CIRCUIT FOR A MOTOR VEHICLE COMPRISING A GENERATOR HAVING A FIELD WINDING, A TWO LEAD DIRECT CURRENT OUTPUT CIRCUIT CONNECTED WITH SAID GENERATOR TO BE ENERGIZED THEREBY, A TRANSITOR HAVING BASE, EMITTER AND COLLECTOR ELECTRODES, MEANS CONNECTING ONE SIDE OF SAID FIELD WINDING WITH ONE OF THE OUTPUT LEADS, MEANS CONNECTING THE EMITTER TO COLLECTOR CIRCUIT OF SAID TRANSISTOR BETWEEN THE OPPOSITE SIDE OF SAID FIELD WINDING AND SAID OTHER OUTPUT LEAD WHEREBY THE CURRENT PASSING THROUGH THE FIELD IS A FUNCTION OF EMITTER TO COLLECTOR CONDUCTION OF SAID TRANSISTOR, A FIRST RELAY OF THE ELECTROMAGNETIC-VIBRATORY TYPE HAVING A FIRST PAIR OF SWITCH CONTACTS AND A FIRST ACTUATING COIL, SAID RELAY BEING OPERATIVE TO MAINTAIN SAID CONTACTS CLOSED WHEN SAID ACTUATING COIL IS ENERGIZED WITH A CURRENT BELOW A PREDETERMINED VALUE AND BEING OPERATIVE TO OPEN SAID CONTACT WHEN THE ACTUATING COIL IS ENERGIZED WITH A CURRENT ABOVE SAID PREDETERMINED VALUE, A SECOND RELAY OF THE ELECTROMAGNETIC-VIBRATORY TYPE HAVING A SECOND PAIR OF SWITCH CONTACTS AND A SECOND ACTUATING COIL, SAID SECOND RELAY BEING OPERATIVE TO MAINTAIN SAID SECOND RELAY CONTACTS CLOSED WHEN SAID SECOND ACTUATING COIL IS ENERGIZED WITH A VOLTAGE BELOW A PREDETERMINED VALUE AND BEING OPERATIVE TO OPEN SAID SECOND SWITCH CONTACTS WHEN SAID SECOND COIL WINDING IS ENERGIZED WITH A VOLTAGE ABOVE SAID PREDETERMINED VALUE, MEANS CONNECTING THE ACTUATING COIL OF SAID FIRST RELAY IN SERIES WITH ONE OF SAID OUTPUT LEADS, MEANS CONNECTING THE ACTUATING COIL OF SAID SECOND RELAY ACROSS SAID OUTPUT LEADS WHEREBY SAID FIRST AND SECOND ACTUATING COILS RESPOND RESPECTIVELY TO CURRENT AND VOLTAGE OUTPUT OF SAID GENERATOR, A BASE CIRCUIT FOR SAID TRANSISTOR CONNECTED BETWEEN THE BASE ELECTRODE OF SAID TRANSISTOR AND THE D.C. OUTPUT LEAD THAT IS CONNECTED WITH THE COLLECTOR SIDE OF THE EMITTER TO COLLECTOR CIRCUIT OF THE TRANSISTOR, SAID BASE CIRCUIT INCLUDING, SAID FIRST AND SECOND RELAY CONTACTS, A CONDUCTOR MEANS CONNECTING SAID RELAY CONTACTS IN SERIES, A CONDUCTOR MEANS CONNECTING ONE SIDE OF ONE OF SAID PAIR OF RELAY CONTACTS WITH SAID BASE ELECTRODE AND A CONDUCTOR MEANS CONNECTING ONE SIDE OF THE OTHER OF SAID PAIR OF RELAY CONTACTS WITH THE OUTPUT LEAD THAT IS CONNECTED WITH THE COLLECTOR SIDE OF THE EMITTER TO COLLECTOR CIRCUIT OF THE TRANSISTOR, THE RESISTANCE OF SAID BASE CIRCUIT BEING OF A VALUE TO PERMIT BASE CURRENT FLOW WHEN SAID FIRST AND SECOND RELAY SWITCH CONTACTS ARE CLOSED AND SAID BASE CIRCUIT BEING OPEN CIRCUITED WHERE SAID FIRST OR SECOND RELAY SWITCH CONTACTS ARE OPEN WHEREBY THE CONDUCTION OF THE TRANSISTOR FROM EMITTER TO COLLECTOR IS CONTROLLED AS A FUNCTION OF BASE CIRCUIT RESISTANCE, AND AN ELECTRICAL LOAD CONNECTED ACROSS SAID OUTPUT LEADS.