Polarity correcting circuits

Claim 1

IN A CIRCUIT FOR CONNECTING A BATTERY TO A BATTERY CHARGER WITH THE PROPER POLARITY, THE COMBINATION OF A PAIR OF LEADS CONNECTABLE TO THE TERMINALS OF A BATTERY TO BE CHARGED; A SOURCE OF CHARGING CURRENT FOR NORMALLY APPLYING CHARGING POTENTIAL OF ONE POLARITY TO SAID LEADS, SAID SOURCE HAVING TWO OUTPUT CONDUCTORS AND A COMMON CONDUCTOR, SAID TWO OUTPUT CONDUCTORS PROVIDING CHARGING POTENTIAL OF OPPOSITE POLARITY WITH RESPECT TO A COMMON CONDUCTOR, ONE OF SAID LEADS BEING CONNECTED TO SAID COMMON CONDUCTOR AND THE OTHER OF SAID LEADS BEING SELECTIVELY CONNECTED TO ONE OF THE REMAINING CONDUCTORS; POLARITY RESPONSIVE CIRCUIT MEANS CONNECTED BETWEEN SAID LEADS AND OPERATIVE TO REVERSE THE POLARITY OF POTENTIAL APPLIED BY SAID SOURCE TO SAID LEADS, SAID POLARITY RESPONSIVE CIRCUIT MEANS INCLUDING A RELAY HAVING AN ACTUATING WINDING AND CONTACTS SO ARRANGED THAT SAID SOURCE IS CONNECTED TO SAID LEADS TO PROVIDE POTENTIAL OF ONE POLARITY WHEN SAID ACTUATING WINDING IS NOT ENERGIZED, AND OF THE OPPOSITE POLARITY WHEN SAID ACTUATING WINDING IS ENERGIZED, AND A TRANSISTOR HAVING THREE ELECTRODES, ONE SAID ELECTRODE BEING CONNECTED TO SAID ACTUATING WINDING OF SAID RELAY AND BEING OPERATIVE TO ENERGIZE SAID ACTUATING WINDING WHEN ENERGIED, SAID OTHER ELECTRODES BEING CONNECTED BETWEEN SAID LEADS SO AS TO BECOME CONDUCTIVE WHENEVER A BATTERY IS CONNECTED TO SAID LEADS WITH SAID OPPOSITE POLARITY.