Polarity responsive battery charger

• US 3,307,097 A
• Filed: 04/29/1964
• Issued: 02/28/1967
• Est. Priority Date: 04/29/1964
• Status: Expired due to Term

• Current Assignee: Franklin C. Brewster
• Original Assignee: Franklin C. Brewster
• Inventors: Brewster, Franklin C.
• Application Number:
  US04/363,545
• Time in Patent Office: 1,035 Days
• US Class Current: 320/165
• CPC Class Codes: H02H 7/1257 responsive to short circuit or wrong polarity in output circuit
• CPC Class Codes: H02J 7/0029 with safety or protection devices or circuits
• CPC Class Codes: H02J 7/00309 Overheat or overtemperature protection
• CPC Class Codes: H02J 7/0034 using reverse polarity correcting or protecting circuits mechanical means of polarity protection H02J7/0045
• CPC Class Codes: H02J 7/14 for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Claims

1. A PROTECTIVE CIRCUIT FOR USE IN A MOTOR VEHICLE ELECTRICAL SYSTEM WHICH INCLUDES A STORAGE BATTERY, AN ALTERNATING CURRENT GENERATOR, A PLURALITY OF RECTIFYING DIODES COUPLED TO THE GENERATOR AND POLED TO DEVELOP A POTENTIAL OF THE PROPER POLARITY TO CHARGE THE BATTERY, AND AN ISOLATION DIODE COUPLED TO THE PLURALITY OF RECTIFYING DIODES, THE ISOLATION DIODE BEING POLED TO PASS CURRENT FROM THE RECTIFYING DIODES TO THE STORAGE BATTERY, SAID PROTECTIVE CIRCUIT INCLUDING IN COMBINATION, RELAY MEANS HAVING NORMALLY OPEN CONTACTS AND A RELAY COIL, A CIRCUIT INCLUDING SAID CONTACTS COUPLING THE ISOLATION DIODE TO THE BATTERY, BLOCKING DIODE MEANS COUPLING THE BATTERY TO SAID RELAY COIL, SAID RELAY COIL AND SAID BLOCKING DIODE MEANS BEING RESPONSIVE TO A CORRECT POLARITY CONNECTION OF THE BATTERY TO CLOSE SAID CONTACTS AND COUPLE THE BATTERY TO THE PLURALITY OF DIODES, SAID RELAY COIL AND SAID BLOCKING DIODE FURTHER BEING RESPONSIVE TO AN INCORRECT POLARITY CONNECTION OF THE BATTERY TO OPEN SAID CONTACTS AND UNCOUPLE THE BATTERY FROM THE PLURALITY OF DIODES, AND RESISTANCE MEANS COUPLING THE RECTIFYING DIODES TO SAID RELAY COIL.