Apparatus for welding by fusing a metal strip

Claim 1

IN MECHANISM FOR OVERLAY ELECTRIC ARE WELDING WITH CONTROLLED PENETRATION IN A METALLIC WORK SHEET OR PLATE, A CONSUMABLE METALLIC WELDING ELECTRODE DISPOSED GENERALLY TRANSVERSE TO THE WORK, MEANS FOR PROGRESSING THE ELECTRODE ALONG A LINE CONFORMING TO THE WORK WHILE MAINTAINING THE ELECTRODE GENERALLY TRANSVERSE TO THE WORK, MEANS FOR LAYING DOWN WITH ONE SIDE AGAINST THE WORK ALONG SAID LINE A FIRST METALLIC RECTANGULAR WELD STRIP HAVING A RELATIVELY LOW ALLOY CONTENT, MEANS FOR LAYING DOWN WITH ONE SIDE AGAINST SAID FIRST WELD STRIP A SECOND RECTANGULAR METALLIC WELD STRIP HAVING A RELATIVELY HIGHER ALLOY CONTENT THAN SAID FIRST WELD STRIP, THE CROSS SECTION OF SAID WELD STRIPS BEING IN THE RANGE BETWEEN 0.005 AND 0.250 SQUARE INCH, AND SAID FIRST AND SECOND WELD STRIPS REACHING A POSITION AGAINST THE WORK AHEAD OF THE ELECTRODE, SAID WELD STRIPS WHEN RESTING AGAINST THE WORK BEING FREE FROM LATERAL PROXIMITY OF OTHER WELD STRIPS NOT INCORPORATED IN THE WELD, AND MEANS FOR MAINTAINING AN ARC BETWEEN THE ELECTRODE AND SAID FIRST AND SECOND WELD STRIPS SO AS TO MELT SAID FIRST AND SECOND WELD STRIPS AND THE ADJOINING PORTION OF THE WORK WITH CONTROLLED PENETRATION IN A SINGLE PASS.