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Portable, rechargeable power supply

  • US 4,300,087 A
  • Filed: 07/27/1979
  • Issued: 11/10/1981
  • Est. Priority Date: 08/12/1978
  • Status: Expired due to Term
First Claim
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1. A portable, rechargeable power supply, comprising:

  • a portable casing;

    a rechargeable battery located within said casing;

    a voltage converter for converting a D.C. output voltage from said battery into an A.C. voltage;

    a rectifier circuit for converting an A.C. input voltage into a D.C. voltage and supplying the D.C. voltage to said battery;

    a transformer having a first winding connected to said voltage converter, a second winding connected to said rectifier circuit, and a third winding operatively associated with each of said first and second windings;

    an input/output socket connected to said third winding; and

    switching means including a first switch for enabling said first and third windings of said transformer to supply an A.C. voltage from said voltage converter to said socket, and a second switch for enabling said second and third windings of said transformer to supply an A.C. voltage from said socket to said rectifier circuit to recharge said battery.

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