Battery chargers

Claim 1

IN A BATTERY CHARGER, THE COMBINATION OF CHARGING CIRCUIT MEANS INCLUDING A TRANSFORMER HAVING A PRIMARY AND A SECONDARY WINDING, A RECTIFIER CONNECTED TO SAID SECONDARY WINDING, A PAIR OF D.C. CHARGING LEADS CONNECTED TO RECEIVE CURRENT FROM SAID RECTIFIER, AND A PAIR OF A.C. LEADS CONNECTABLE TO SAID PRIMARY WINDING; TWO PIVOTED JAW TERMINAL CLAMPS EACH INCLUDING A PAIR OF JAW PORTIONS WHICH ARE ELECTRICALLY INSULATED FROM EACH OTHER AND ARRANGED TO COOPERATE TO CLAMP A TERMINAL OF THE BATTERY TO BE CHARGED, EACH OF SAID D.C. LEADS BEING ELECTRICALLY CONNECTED TO ONE OF SAID JAW PORTIONS OF A DIFFERENT ONE OF SAID CLAMPS; A RELAY HAVING CONTACTS CONNECTED TO ESTABLISH A PRIMARY CIRCUIT COMPRISING SAID PRIMARY WINDING AND SAID A.C. LEADS WITH SAID PRIMARY CIRCUIT SELECTIVELY INCLUDING DIFFERENT PORTIONS OF SAID PRIMARY WINDING TO PROVIDE DIFFERENT OUTPUTS FOR CHARGING BATTERIES OF DIFFERENT KNOWN VOLTAGE RATINGS, SAID RELAY ALSO INCLUDING AN ACTUATING WINDING; AND CONTROL CIRCUIT MEANS CONNECTED BETWEEN THE OTHERS OF SAID JAW PORTIONS TO RECEIVE CURRENT FROM THE BATTERY WHEN SAID CLAMPS ARE CONNECTED TO THE TERMINALS OF THE BATTERY TO BE CHARGED, SAID CONTROL CIRCUIT MEANS BEING CONNECTED TO THE ACTUATING WINDING OF SAID RELAY TO ENERGIZE THE SAME'' SELECTIVELY IN ACCORDANCE WITH THE VOLTAGE OF THE BATTERY TO WHICH SAID CLAMPS ARE CONNECTED.