Equipment for forming high temperature plasmas

Claim 1

IN AN EQUIPMENT FOR CREATING A HIGH TEMPERATURE PLASMA BY MEANS OF AN ELECTRIC ARC POWERED BY ALTERNATING CURRENT, AT LEAST TWO CONSUMBALE ELECTRODES, A SOURCE OF ALTERNATING CURRENT CONNECTED TO SAID ELECTRODES AND CAPABLE OF STRIKING AN ARC BETWEEN SAID ELECTRODES, MEANS FOR FEEDING SAID ELECTRODES TOWARD EACH OTHER AS THEY ARE FUSED IN THE ARC, A NON CONSUMABLE ELECTRODE, A HOLLOW NON CONSUMABLE ELECTRODE COAXIAL WITH THE FIRST NON CONSUMABLE ELECTRODE, A DIRECT CURRENT AND CAPABLE OF STRIKING AN TWO NON CONSUMABLE ELECTRODES AND CAPABLE OF STRIKING AN ARC BETWEEN THESE NON CONSUMABLE ELECTRODES, AND MEANS TO PROJECT A PLASMA FORMED BY THE ARC STRUCK BY SAID DIRECT CURRENT SOURCE INTO THE HOLLOW ELECTRODE, SAID HOLLOW ELECTRODE BEING DISPOSED IN SUCH MANNER THAT THE PLASMA JET ISSUING THEREFROM MEETS THE ENDS OF THE CONSUMABLE ELECTRODES OUTSIDE OF SUCH HOLLOW ELECTRODE.