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Large surface area electrode

  • US 5,295,482 A
  • Filed: 10/22/1992
  • Issued: 03/22/1994
  • Est. Priority Date: 10/22/1992
  • Status: Expired due to Fees
First Claim
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1. A large surface area electrode, for use with a power supply having a more uniform current density distribution for contacting an exposed surface of skin of a living body having a contour, comprising a layer of flexible conductive material of a predetermined geometrical shape and having first and second surfaces, said layer of flexible conductive material being normally relatively flat but being capable of assuming the contour of the skin of the body when the electrode is placed in contact with the body with the first surface of the layer engaging the exposed surface of the skin of the body, said layer of flexible conductive material having a central portion and a surrounding ring portion, said central portion and said surrounding ring portion having outer edges, means forming a flexible carrier layer having a first surface secured to the second surface of the layer of flexible conductive material and serving to support said central portion and said surrounding ring portion so that the surrounding ring portion is spaced from and insulated from the central portion and coupling means adapted to couple said central portion and said surrounding ring portion to said power supply for controlling the current densities at said edges so that the current densities at said edges do not exceed predetermined values, said coupling means forming a direct connection to the central portion and including a resistor connected to said surrounding ring portion.

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