Battery charge maintainers

• US 3,252,070 A
• Filed: 07/31/1962
• Issued: 05/17/1966
• Est. Priority Date: 07/31/1962
• Status: Expired due to Term

• Current Assignee: James B. Godshalk, Lewis A. Medlar
• Original Assignee: James B. Godshalk, Lewis A. Medlar
• Inventors: Medlar, Lewis A., Godshalk, James B.
• Application Number:
  US04/213,650
• Time in Patent Office: 1,386 Days
• US Class Current: 320/141
• CPC Class Codes: H02J 2207/20 Charging or discharging characterised by the power electronics converter
• CPC Class Codes: H02J 7/02 for charging batteries from ac mains by converters
• CPC Class Codes: Y10S 320/22 Line impedance, e.g. resistor
• CPC Class Codes: Y10S 320/23 Capacitor

Claims

1. IN A BATTERY CHARGE MAINTAINER, THE COMBINATION OF A CHARGING CIRCUIT INCLUDING CONNECTOR MEANS FOR CONNECTION TO AT LEAST ONE BATTERY TO BE CHARGED, ELECTRICAL RELAY MEANS CONNECTED IN SAID CHARGING CIRCUIT IN SERIES WITH SAID CONNECTOR MEANS AND INCLUDING A CONTROL ELEMENT. A FIRST RESISTANCE AND A BREAKDOWN DEVICE CONNECTED IN SERIES AND MEANS CONNECTING THE JUNCTION POINT BETWEEN SAID RESISTANCE AND DISCHARGE DEVICE TO THE CONTROL ELEMENTT OF SAID RELAY MEANS, A CONDENSER CONNECTED ACROSS THE SERIES COMBINATION OF SAID FIRST RESISTANCE AND BREAKDOWN DEVICE TO FORM A PARALLEL CIRCUIT, A SECOND RESISTANCE, AND DIRECT CURRENT CIRCUIT MEANS CONNECTING SAID SECOND RESISTANCE IN SERIES WITH SAID PARALLEL CIRCUIT, THE COMBINATION OF SAID BREAKDOWN DEVICE, CONDENSER AND SECOND RESISTANCE CONSTITUTING A RELAXATION OSCILLATOR, AND SAID RELAY MEANS BEING OPERABLE TO SUPPLY CHARGING CURRENT PULSES VIA SAID CHARGING CIRCUIT TIMED IN ACCORDANCE WITH OPERATION OF SAID OSCILLATOR.