Power supply backup device for use in portable electronic apparatus

  • US 5,347,163 A
  • Filed: 01/31/1992
  • Issued: 09/13/1994
  • Est. Priority Date: 02/04/1991
  • Status: Expired due to Fees
  • ×
    • Pin Icon | RPX Insight
    • Pin
First Claim
Patent Images

1. A power supply backup device used for a portable electronic apparatus having a main battery and an auxiliary battery, comprising:

  • a backup battery for supplying power to said portable electronic apparatus at a time of exchange of at least one of said main battery and said auxiliary battery;

    means for detecting a physical removal of said main battery and said auxiliary battery respectively from said apparatus; and

    means for switching over a circuit for connecting said backup battery with said apparatus so as to supply power from said backup battery when said detecting means detects the removal of at least one of said main battery and said auxiliary battery.

View all claims
  • 1 Assignment
    ×
    ×

    Thank you for your feedback

    ×
    ×