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DIRECT CURRENT POWER SUPPLY FOR ELECTRICAL APPLIANCES

  • US 3,790,810 A
  • Filed: 06/30/1972
  • Issued: 02/05/1974
  • Est. Priority Date: 06/30/1972
  • Status: Expired due to Term
First Claim
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1. A power supply arrangement, comprising in combination, transformer means with primary winding connected to a supply of alternating current and secondary winding having a center tap;

  • first rectifying means connected to one terminal of said secondary winding;

    switch means connected to said secondary winding and said center tap;

    load means connected by said switch means to said secondary winding in a first operating state, said switch means disconnecting said load from said secondary winding in a second operating state;

    battery means connected to said switch means for being charged by power from said secondary winding and through said first rectifying means when said switch means is in said second operating state, said battery means being charged with half-wave rectified alternating current; and

    second rectifying means connected between said switch means and said secondary winding for applying full-wave rectified alternating current to said load means in said first operating state, said load means receiving full-wave rectified current through said first and second rectifying means and said battery means being connected to half of said secondary through said switch means in said first operating state, said battery means being connected across both halves of said secondary winding when charged with half-wave rectified alternating current in said second operating state.

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