Automatic battery charger control circuit

• US 3,076,127 A
• Filed: 09/03/1959
• Issued: 01/29/1963
• Est. Priority Date: 09/03/1959
• Status: Expired due to Term

• Current Assignee: Thomas J. Grecu
• Original Assignee: Thomas J. Grecu
• Inventors: Grecu, Thomas J.
• Application Number:
  US03/837,890
• Time in Patent Office: 1,244 Days
• US Class Current: 320/130
• CPC Class Codes: H02J 7/00716 in response to integrated charge or discharge current
• CPC Class Codes: H02J 7/04 Regulation of charging current or voltage

Claims

1. A BATTERY CHARGER CONTROL CIRCUIT FOR AUTOMATICALLY INITIATING A RECHARGING CYCLE COMPRISING, A SOURCE OF CHARGING VOLTAGE FOR A BATTERY CONNECTED ACROSS SAID VOLTAGE SOURCE, SWITCH MEANS CONTROLLING THE APPLICATION OF CHARGING VOLTAGE TO SAID BATTERY, SAID SWITCH MEANS INCLUDING A BIMETALLIC ELEMENT, FIRST HEATING MEANS IN PARALLEL WITH SAID BATTERY AND ADAPTED TO GRADUALLY RADIATE HEAT AS A FUNCTION OF THE CHARGE ON SAID BATTERY, SAID FIRST HEATING MEANS OPERATIVELY CONNECTED TO SAID BIMETALLIC ELEMENT FOR MOVING SAID ELEMENT INTO A SWITCH MEANS OPENING POSITION TO DISCONNECT SAID SOURCE FROM SAID BATTERY WHEN A PREDETERMINED VALUE OF MAXIMUM CHARGE THEREON HAS BEEN REACHED, SECOND HEATING MEANS IN SERIES WITH SAID SOURCE AND OPERATIVELY CONNECTED TO SAID BIMETALLIC ELEMENT, SAID SECOND HEATING MEANS ACTUATED ONLY WHEN SAID SWITCH MEANS IS OPEN AND ADAPTED TO RADIATE HEAT LESS THAN SUFFICIENT TO MAINTAIN SAID SWITCH MEANS OPEN, SAID FIRST AND SECOND HEATING MEANS JOINTLY MAINTAINING SAID SWITCH MEANS OPEN UNTIL A PREDETERMINED VALUE OF MINIMUM CHARGE IS REACHED ON SAID BATTERY DURING THE DISCHARGE CYCLE THEREOF, ADDITIONAL BIMETALLIC MEANS CORRECTING FOR AN INCREASE IN THE AMBIENT TEMPERATURE FOR PREVENTING OPENING OF SAID SWITCH MEANS BY THE HEATING EFFECT OF SAID FIRST HEATING MEANS BEFORE SAID BATTERY IS CHARGED TO SAID MAXIMUM PREDETERMINED VALUE IN A HIGHER AMBIENT.