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Automatic resetting temperature controlled battery changing system

  • US 4,045,720 A
  • Filed: 05/04/1976
  • Issued: 08/30/1977
  • Est. Priority Date: 05/04/1976
  • Status: Expired due to Term
First Claim
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1. A battery charging circuit comprising:

  • first and second terminals for connecting the charging circuit to a source of direct charging current and to one electrode of like polarity of a battery to be charged; and

    ,first and second current paths connected in parallel between said first and second terminals for selectively conducting current from said source of charging current to said one electrode of the battery,said first current path including first and second switching means each having a normally closed position and an open position, said first switching means being actuated from the closed to the open position thereof in response to a temperature of the battery being charged exceeding a predetermined value,said second current path including means for actuating said second switching means from the closed to the open position thereof in response to current flow in said second current path exceeding a predetermined current value,said second current path having a resistance to current flow such that, with said first and second switching means in the normally closed positions thereof, current flow through said second current path is less than said predetermined current value, said predetermined current value being exceeded in response to the opening of either of said switching means.

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