Dual rate battery charger with d.c. reference source

Claim 1

A BATTERY CHARGER COMPRISING A CHARGING SOURCE OF DIRECT CURRENT POTENTIAL, A REFERENCE SOURCE OF DIRECT CURRENT POTENTIAL, POSITIVE AND NEGATIVE CHARGING TERMINALS ADAPTED TO HAVE THE CORRESPONDING TERMINALS OF A BATTERY CONNECTED THERETO, A CONTROLLED RECTIFIER INCLUDING A CATHODE, ANODE, AND A GATE, SAID CONTROLLED RECTIFIER BLOCKING IN THE FORWARD DIRECTION UNTIL A GATING SIGNAL IS APPLIED TO SAID GATE AND THEREAFTER CONDUCTING IN THE FORWARD DIRECTION, MEANS CONNECTING SAID ANODE TO THE POSITIVE SIDE OF SAID CHARGING SOURCE, MEANS CONNECTING THE NEGATIVE SIDE OF SAID CHARGING SOURCE TO SAID NEGATIVE CHARGING TERMINAL, MEANS CONNECTING SAID CATHODE TO SAID POSITIVE CHARGING TERMINAL, A GATING-SIGNAL CIRCUIT INCLUDING A RESISTANCE CONNECTED IN SERIES BETWEEN SAID REFERENCE SOURCE AND SAID NEGATIVE CHARGING TERMINAL FOR PRODUCING A GATING SIGNAL AS A FUNCTION OF THE DIFFERENCE BETWEEN THE REFERENCE POTENTIAL OF SAID REFERENCE SOURCE AND THE VOLTAGE DROP ACROSS SAID RESISTANCE AND THE VARIABLE POTENTIAL OF THE BATTERY CONNECTED ACROSS SAID CHARGING TERMINALS, SAID RECTIFIER WHEN CONDUCTING IN THE FORWARD DIRECTION ESTABLISHING A HIGH-RATE CHARGING CIRCUIT FOR SAID BATTERY, AND A RESISTANCE BYPASSING SAID CONTROLLED RECTIFIER AND ESTABLISHING A TRICKEL CHARGING CIRCUIT FOR SAID BATTERY WHEN SAID CONTROLLED RECTIFIER IS BLOCKING, SAID REFERENCE SOURCE OF DIRECT CURRENT POTENTIAL INCLUDING A VOLTAGE-STABILIZING MEANS ADAPTED TO BE CONNECTED TO A SOURCE OF ALTERNATING CURRENT, AND A FULL-WAVE RECTIFIER HAVING ITS INPUT CONNECTED TO SAID VOLTAGE-STABILIZING MEANS, AND A PRELOADING RESISTOR CONNECTED ACROSS THE OUTPUT OF SAID FULL-WAVE RECTIFIER AND PROVIDING SAID REFERENCE POTENTIAL IN SAID GATINGSIGNAL CIRCUIT.