Battery charging circuits

• US 3,348,118 A
• Filed: 09/14/1964
• Issued: 10/17/1967
• Est. Priority Date: 09/14/1964
• Status: Expired due to Term

• Current Assignee: Donald L. Watrous
• Original Assignee: Donald L. Watrous
• Inventors: Watrous, Donald L.
• Application Number:
  US04/396,006
• Time in Patent Office: 1,128 Days
• US Class Current: 320/140
• CPC Class Codes: H02J 7/00712 the cycle being controlled or terminated in response to electric parameters
• CPC Class Codes: H02J 7/00714 in response to battery charging or discharging current
• CPC Class Codes: Y10S 320/11 Prioritized supply of power or power supply compensation

Claims

1. A CHARGING CIRCUIT FOR CHARGING AN ENERGY STORAGE DEVICE TO A PREDETERMINED ENERGY LEVEL INCLUDING IN COMBINATION A PAIR OF POWER SUPPLY TERMINALS ADAPTED TO BE CONNECTED ACROSS AND SOURCE OF ELECTRIC POTENTIAL, A CONDUCTIVITY CONTROLLED CONDUCTING DEVICE OPERATIVELY CONNECTED IN SERIES CIRCUIT RELATIONSHIP WITH THE PRIMARY WINDING OF A TRANSFORMER HAVING INDUCTIVELY COUPLED PRIMARY AND SECONDARY WINDINGS, THE SERIES CIRCUIT THIS COMPRISED BEING CONNECTED ACROSS A PAIR OF POWER SUPPLY TERMINALS, TURN-ON MEANS FOR TURNING ON SAID CONDUCTIVITY CONTROLLED CONDUCTING DEVICE TO CAUSE IT TO CONDUCT, TURN-OFF MEANS FOR TURNING OFF SAID CONDUCTIVITY CONTROLLED CONDUCTING DEVICE AFTER A DESIRED INTERVAL TO CONDUCTION, RECTIFYING MEANS FOR COUPLING THE SECONDARY WINDING OF THE TRANSFORMER ACROSS THE ENERGY STORAGE DEVICE, SENSING MEANS FOR SENSING THE ENERGY LEVEL OF THE ENERGY STORAGE DEVICE, AND MEANS OPERATIVELY INTERCOUPLING THE OUTPUT FROM SUCH SENSING MEANS TO SAID TURN-ON MEANS FOR RENDERING SAID TURN-ON MEANS INOPERATIVE TO TURN-ON SAID CONDUCTIVITY CONTROLLED CONDUCTING DEVICE UPON SAID ENERGY STORAGE DEVICE REACHING A PREDETERMINED ENERGY STORAGE LEVEL, WHEREIN SAID CONDUCTIVITY CONTROLLED CONDUCTING DEVICE COMPRISES A GATE TURN-OFF SILICON CONTROLLED RECTIFIER DEVICE, AND WHEREIN THE CIRCUIT IS FURTHER CHARACTERIZED BY CURRENT DIVERTING CIRCUIT MEANS OPERATIVELY CONNECTED IN PARALLEL CIRCUIT RELATIONSHIP WITH THE GATE TURN-OFF SILICON CONTROLLED RECTIFIER DEVICE FOR SUPPLYING A HOLDING CURRENT TO THE DEVICE DURING ITS INITIAL TURN-ON, AND FOR DIVERTING CURRENT FROM THE DEVICE UPON ITS BEING TURNED OFF AND RETURNED TO ITS BLOCKING OR NON-CONDUCTING CONDITION.