Electrode for use in low frequency electronic therapy device

Claim 1

A low frequency electronic therapy device adapted to apply a low frequency electric stimulus to a therapy point of a warm-blooded animal which device comprises a casing, a low frequency oscillator contained in said casing, said oscillator having output terminals, at least two electrodes electrically connected to the output terminals of the oscillator, said electrodes being adapted to be brought in contact with the skin at the therapy point, each of said electrodes including a hollow hemispherical conductive member having a mouth and a plurality of perforations therethrough and a mounting metal base water-tightly fitted into the mouth of said hollow member to form a hollow chamber in said hollow member for storing water therein, each of said mounting metal bases being mounted on the outerside of said casing and electrically connected to a corresponding output terminal of said oscillator, a water-impregnating cover being applied to the outer surface of each of said conductive member covering said perforations, so that water stored in said hollow chamber exudes gradually through said perforations to impregnate said water impregnating cover, whereby said water impregnating cover is maintained impregnated with water to keep good electric contact between the electrode and the skin.