Protection device for solid state battery charging systems

Claim 1

BATTERY CHARGING SYSTEM COMPRISING IN COMBINATION A BATTERY, A TRANSISTORIZED VOLTAGE REGULATOR, AN ALTERNATING CURRENT GENERATING SOURCE, A RECTIFIER FOR CONVERTING TO DIRECT CURRENT THE OUTPUT OF SAID GENERATING SOURCE AND HAVING DIRECT CURRENT OUTPUT TERMINALS, CIRCUIT MEANS INTERCONNECTING THE DIRECT CURRENT TERMINALS OF SAID RECTIFIER TO THE BATTERY AND REGULATOR, FIRST AND SECOND RELAY COILS CONNECTED IN PARALLEL CROSS SAID DIRECT CURRENT TERMINALS AND THE TERMINALS OF SAID BATTERY, AN IGNITION SWITCH IN SERIES WITH SAID FIRST RELAY COIL, A BLOCKING DIODE IN SERIES WITH SAID RELAY COILS POLED TO PREVENT ENERGIZATION OF SAID COILS IF SAID CIRCUIT MEANS IS CONNECTED TO THE INCORRECT POLARITY OF SAID BATTERY, SAID CIRCUIT MEANS INCLUDING PARALLEL CIRCUITS INTERCONNECTING ONE TERMINAL OF SAID BATTERY TO ONE OF SAID DIRECT CURRENT TERMINALS OF THE RECTIFIER, SAID PARALLEL CIRCUITS CONTAINING FIRST AND SECOND CONTACTS CONTROLLED RESPECTIVELY BY SAID FIRST AND SECOND RELAY COILS AND EACH COMPLETING ONE OF SAID PARALLEL CIRCUITS BETWEEN THE BATTERY AND THE DIRECT CURRENT OUTPUT OF SAID RECTIFIER WHEN SAID BATTERY IS CORRECTLY CONNECTED TO SAID CIRCUIT, A RECTIFIER IN ONE OF SAID PARALLEL CIRCUITS IN SERIES WITH SAID SECOND RELAY CONTACT AND HAVING SUFFICIENTLY HIGH IMPEDANCE TO CAUSE DIRECT CURRENT OUTPUT OF THE RECTIFIER TO FLOW ESSENTIALLY THROUGH THE OTHER OF THE SAID PARALLEL CIRCUITS WHEN BOTH SAID RELAYS ARE CLOSED, WHILE PROVIDING A PATH FOR SAID DIRECT CURRENT OUTPUT WHEN THE FIRST RELAY IS NOT ENERGIZED BY SAID BATTERY WHEREBY PROTECTION AGAINST ARCING IS PROVIDED UPON THE OPENING OF SAID IGNITION SWITCH.