Method of welding

Claim 1

THE METHOD OF MAKING A GAS-TIGHT JOINT BETWEEN A TUBE AND SHEET, SAID SHEET HAVING AN OPENING INTO WHICH SAID TUBE IS TO PROJECT, AND SAID SHEET AND SAID TUBE BEING OF DISSIMILAR MATERIALS, BY ARC-WELDING WITH A NONCONSUMABLE ELECTRODE WHICH COMPRISES, POSITIONING SAID TUBE IN SAID OPENING, PLACING A RING OF A FILLER MATERIAL WHICH PRODUCES SATISFACTORY JOINTS BETWEEN SAID DISSIMILAR MATERIALS AROUND SAID TUBE AT A POSITION ADJACENT SAID SHEET, POSITIONING SAID ELECTRODE AT A PREDETERMINED FIRST ANGLE TO THE AXIS OF SAID TUBE, AT A PREDETERMINED SECOND ANGLE IN TRAILING RELATIONSHIP TO THE SUCCESSIVE PLANES PERPENDICULAR TO THE PLANE OF SAID OPENING AND INCLUDING THE AXIS OF SAID TUBE AND THE SUCCESSIVE POINTS WHERE A WELDING ARC FROM SAID ELECTRODE IS TO TERMINATE AND WITH THE TIP OF SAID ELECTRODE A PREDETERMINED DISTANCE FROM THE OUTERMOST POINT OF SAID RING SUCH THAT A CONTINUOUS QUIET WELDING ARC MAY BE MAINTAINED BETWEEN SAID ELECTRODE AND SAID RING, MOVING SAID ELECTRODE ABOUT SAID AXIS WHILE MAINTAINING SAID ELECTRODE SO POSITIONED, AND PRODUCING A WELDING ARC BETWEEN SAID ELECTRODE AND SAID RING WHILE SAID ELECTRODE IS BEING SO MOVED TO WELD SAID RING AND PRODUCE A SEAL BETWEEN SAID TUBE AND SHEET AT SAID JUNCTION, THE JOINT PRODUCED BY SAID WELD INCLUDING ONLY THE METAL OF SAID RING, THE METAL OF SAID TUBE AND THE METAL OF SAID SHEET.

Claim 2

THE METHOD OF MAKING A GAS-TIGHT JOINT BETWEEN A TUBE AND SHEET, SAID SHEET HAVING AN OPENING INTO WHICH SAID TUBE IS TO PROJECT, AND SAID SHEET AND SAID TUBE BEING OF DISSIMILAR MATERIALS, BY ARC-WELDING WITH A NONCONSUMABLE ELECTRODE WHICH COMPRISES, POSITIONING SAID TUBE IN SAID OPENING, PLACING A RING OF A FILLER MATERIAL WHICH PRODUCES SATISFACTORY JOINTS BETWEEN SAID DISSIMILAR MATERIALS AROUND SAID TUBE AT A POSITION ADJACENT SAID SHEET, POSITIONING SAID ELECTRODE AT A PREDETERMINED FIRST ANGLE TO THE AXIS OF SAID TUBE, AT A PREDETERMINED SECOND ANGLE IN TRAILING RELATIONSHIP TO THE SUCCESSIVE PLANES PERPENDICULAR TO THE PLANE OF SAID OPENING AND INCLUDING THE AXIS OF SAID TUBE AND THE SUCCESSIVE POINTS WHERE A WELDING ARC FROM SAID ELECTRODE IS TO TERMINATE AND WITH THE TIP OF SAID ELECTRODE A PREDETERMINED DISTANCE FROM THE OUTERMOST POINT OF SAID RING SUCH THAT A CONTINUOUS QUIET WELDING ARC MAY BE MAINTAINED BETWEEN SAID ELECTRODE AND SAID RING, MOVING SAID ELECTRODE ABOUT SAID AXIS WHILE MAINTAINING SAID ELECTRODE SO POSITIONED, AND PRODUCING A WELDING ARC BETWEEN SAID ELECTRODE AND SAID RING WHILE SAID ELECTRODE IS BEING SO MOVED TO WELD SAID RING AND PRODUCE A SEAL BETWEEN SAID TUBE AND SHEET AT SAID JUNCTION, THE JOINT PRODUCED BY SAID WELD INCLUDING ONLY THE METAL OF SAID RING, THE METAL OF SAID TUBE AND THE METAL OF SAID SHEET.