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Electronic clinical thermometer

  • US 4,556,837 A
  • Filed: 03/16/1983
  • Issued: 12/03/1985
  • Est. Priority Date: 03/24/1982
  • Status: Expired due to Fees
First Claim
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1. A method of charging an electronic clinical thermometer having a secondary battery as a power supply, comprising the steps of:

  • (a) placing at least one electronic clinical thermometer into a cylindrical cavity in charger means having a power transmitting coil disposed around said cylindrical cavity, said at least one electronic clinical thermometer comprising a circuit for measuring and displaying the temperature of a portion being measured and;

    a secondary battery for supplying electric power to said circuit;

    rectifier means connected to said secondary battery;

    a power receiving coil connected to said rectifier means for inducing a voltage in response to a change in an external magnetic field applied to the power receiving coil; and

    a hollow bar-shaped casing housing said circuit, said secondary battery, said rectifier means, and said power receiving coil;

    said power receiving coil having a longer diameter extending substantially parallel to a longitudinal direction of said bar-shaped casing; and

    said power transmitting coil of said charger means comprising a set of at least three coils disposed around said cylindrical cavity of said charger means at substantially equal angular intervals;

    (b) passing an alternating current through said power transmitting coil to enable said power transmitting coil to produce a revolving magnetic field for thereby generating a current flowing through said power receiving coil; and

    (c) charging said secondary battery with said generated current through said rectifier means.

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