Electrotherapeutic apparatus

Claim 1

An electrotherapeutic apparatus for external applications comprising circuit means for generating direct-current voltage pulses hving an amplitude between 4 and 22 volts and a frequency of about 8.5 Hz, said circuit means including circuitry for producing a square wave voltage course of said pulses having a pulse duration substantially equal to the time span between two successive pulses, means for applying said pulses to a living body, said pulse applying means comprising an electrode in the form of a roller, said roller having a surface formed of substantially pyramid-shaped electrically conductive parts including tips, the pyramid-shaped parts at the region of said tips having substantially square flattened portions, said flattened portions having an edge length of approximately 0.5 mm, said pyramid-shaped parts being arranged in adjacent rows, the pyramid-shaped parts of said adjacent rows being offset with respect to each other, the spacing between the geometric tips of the pyramid-shaped parts neighboring one another and located in successive rows being 6.955 mm and means connected between said circuit means and said electrode for supplying said voltage pulses to the tips of said pyramid-shaped parts.