Mechanism for oscillating the movable heat source of a welding machine

Claim 1

IN A WELDING MACHINE ADAPTED TO MOVE AN ELECTRODE PARALLEL TO TWO SURFACES BEING WELDED TOGETHER BY THE ELECTRODE AND HAVING MEANS FOR OSCILLATING THE ELECTRODE FROM SIDE TO SIDE AS ITS TRAVELS ALONG THE JOINT BEING WELDED TO INCREASE THE AREA OF BASE METAL EXPOSED ON THE HEAT OF THE ELECTRODE, THE IMPROVEMENT COMPRISING: (A) ELECTRODE HOLDING MEANS PIVOTALLY ATTACHED TO THE WELDING MACHINE TO OSCILLATE THE END OF THE ELECTRODE GENERALLY IN A PLANE PERPENDICULAR TO THE LONGITUDINAL CENTERLINE OF THE WELD; (B) A DRIVE MEMBER RESILIENTLY CONNECTED BY A ROD TO THE ELECTRODE HOLDING MEANS, SAID ROD EXTENDING THROUGH AN OPENING IN THE DRIVE MEMBER WITH STOPS ATTACHED THERETO AN EACH SIDE OF THE MEMBER; (C) RESILIENT MEANS LOCATED BETWEEN THE STOPS AND THE MEMBER TO ALLOW THE AMPLITUDE OF THE ELECTRODE HOLDING MEANS TO BE SHORTER THAN THE AMPLITUDE OF THE DRIVE MEMBER AT THE POINT WHERE THE ROD IS CONNECTED; (D) MEANS MOUNTING THE DRIVE MEMBER COMPRISING A PIVOT PIN AROUND WHICH THE DRIVE MEMBER PIVOTS; (E) MEANS RESILIENTLY CONNECTING THE DRIVE MEMBER, AT A POINT SPACED FROM THE PIVOT PIN, TO THE ELECTRODE HOLDING MEANS TO OSCILLATE THE ELECTRODE HOLDING MEANS AS RESPONSE TO THE OSCILLATION OF THE DRIVE MEMBER; (F) MEANS FOR ADJUSTING THE SPACE BETWEEN THE PIVOT PIN AND THE POINT WHERE THE CONNECTING MEANS IS ATTACHED TO THE DRIVE MEMBER TO ALLOW THE AMPLITUDE OF THE OSCILLATIONS OF THE DRIVE MEMBER TO BE ADJUSTED; (G) MEANS FOR CAUSING THE DRIVE MEMBER TO OSCILLATE AROUND THE PIVOT PIN TO THEREBY CAUSE THE ELECTRODE HOLDING MEANS TO OSCILLATE; AND (H) MEANS FOR ADJUSTING THE AMPLITUDE OF THE OSCILLATION OF THE ELECTRODE HOLDING MEANS.