Direct current polarity control circuit

Claim 1

A DIRECT CURRENT POLARITY CONTROL CIRCUIT CONNECTED BETWEEN A FIRST AND A SECOND DIRECT CURRENT INPUT TERMINAL ACROSS WHICH A DIRECT CURRENT VOLTAGE SOURCE IS TO BE CONNECTED IN A RANDOM FASHION, SO THAT THE INPUT TERMINALS MAY BE EITHER ONE OF TWO RELATIVE POLARITIES, AND A FIRST AND A SECOND LOAD TERMINAL ACROSS WHICH A DIRECT CURRENT VOLTAGE IS TO BE APPLIED HAVING A CONSISTENT RELATIVE POLARITY, SAID CIRCUIT COMPRISING: A RELAY AND A FIRST RECTIFIER CONNECTED IN SERIES ACROSS SAID INPUT TERMINALS FOR EFFECTING THE ENERGIZING FOR SAID RELAY WHEN SAID INPUT TERMINALS HAVE A FIRST RELATIVE POLARITY AND THE DE-ENERGIZING OF SAID RELAY WHEN SAID TERMINALS HAVE THE OPPOSITE POLARITY, SAID RELAY HAVING A MOVABLE CONTACT CONNECTED TO SAID FIRST LOAD TERMINAL AND A FIRST AND SECOND STATIONARY CONTACT RESPECTIVELY CONNECTED TO SAID FIRST AND SECOND INPUT TERMINALS, SAID MOVABLE CONTACT BEING CONNECTED TO SAID FIRST STATIONARY CONTACT WHEN SAID RELAY IS DE-ENERGIZED AND TO SAID SECOND STATIONARY CONTACT WHEN SAID RELAY IS ENERGIZED, A SECOND RECTIFIER CONNECTED BETWEEN SAID SECOND LOAD TERMINAL AND SAID SECOND INPUT TERMINAL FOR COUPLING THE DIRECT CURRENT INPUT VOLTAGE TO SAID LOAD TERMINALS WHEN THE RELAY IS DE-ENERGIZED, AND FOR DECOUPLING THE INPUT VOLTAGE FROM THE LOAD TERMINALS WHEN SAID INPUT TERMINALS HAVE SAID FIRST RELATIVE POLARITY, AND A THIRD RECTIFIER CONNECTED BETWEEN SAID SECOND LOAD TERMINAL AND SAID FIRST INPUT TERMINAL FOR COUPLING THE VOLTAGE OF SAID INPUT TERMINALS TO SAID LOAD TERMINALS WHEN SAID RELAY IS ENERGIZIED AND FOR DECOUPLING THE INPUT VOLTAGE FROM SAID LOAD TERMINALS WHEN THE VOLTAGE ACROSS SAID INPUT TERMINALS HAS SAID OPPOSITE POLARITY.