Arc flash preventing coating for welding rods

Claim 1

A COVERED ELECTRODE FOR USE IN ARC WELDING OPERATIONS AND INCLUDING A CONDUCTIVE METALLIC CORE, A FIRST COVERING COMPRISING AN INTIMATE MIXTURE OF CONVENTIONAL ELECTRODE COVERING INGREDIENTS ADAPTED TO FUNCTION AS FLUXING AGENTS, SLAG-FORMING AGENTS, ARC STABILIZERS, DEOXIDIZERS, SHIELDING GAS FORMERS, AND ALLOYING CONSTITUENTS, A SECOND OVERLYING COVERING MATERIAL FORMING AN EXTERNAL COATING AND CONSISTING ESSENTIALLY OF A MIXTURE IN PARTS BY WEIGHT OF APPROXIMATELY EQUAL PARTS OF SILICA AND MANGANESE DIOXIDE HELD TOGETHER IN AN ADHERENT MASS BY A CONVENTIONAL BINDER MATERIAL WHICH IS COMPATIBLE WITH FORMATION OF A HEAVY BLANKET OF MOLTEN FLUX FROM SAID SECOND OVERLYING COVERING MATERIAL AND PREVENTS PREMATURE DISINTEGRATION OF SAID SECOND COATING UNTIL OPTIMUM DEPOSITION TEMPERATURES ARE REACHED, SAID SECOND COATING BEING AT LEAST AS THICK AS SAID FIRST COATING AND THE RADIAL THICKNESS OF THE TOTAL FLUX COVERING ON SAID CORE BEING A MINIMUM OF TWICE THE OVERALL THICKNESS OF SAID METALLIC CORE.