Apparatus for treatment with sum currents

Details Apparatus for treatment with sum currents Apparatus for treatment with sum currents

1972-11-21

1976-05-25

Kamm, William E.

Surgery

Truss

Pad

A61N 136

Patent

active

039585778

ABSTRACT:
An apparatus for producing interference and beat-currents in a selectable point of the body, particularly for electrotherapy on the human body, which comprises at least two pairs of electrodes adapted to be applied to the human body. Each of the pairs of electrodes has associated therewith an output amplifier. The latter supplies independently selectively pulse and alternating current for each pair of the electrodes. A voltage proportional in amplitude to the current flowing through the patient is taken. The voltage relates mathematically each individual setting voltage with a common setting and is subtracted. The difference voltage is produced separately for each circuit and used for the amplification control on the corresponding of the amplifiers, and the voltage is so polarized that an increase in patient current resulting in a decrease of the amplification and an increase in the joint voltage resulting in an increase of the amplification.

REFERENCES:
patent: 2673559 (1954-03-01), Fawcett
patent: 2979667 (1961-04-01), Paschal
patent: 3523539 (1970-08-01), Lavezzo
patent: 3708754 (1973-01-01), Diehl

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