Air cooled arc welding nozzle assembly

Claim 1

A WELDING NOZZLE ASSEMBLY COMPRISNG, (A) A CONDUCTING MOUNTING STEM HAVING AN INSULATED AXIAL ELECTRODE PASSAGEWAY AND A WELDING CURRENT POWER TERMINAL, (B) A NOZZLE BODY OF CONDUCTIVE MATERIAL SECURED TO THE LOWER END OF THE MOUNTING STEM AND HAVING AN ELECTRODE PASSAGEWAY ALIGNED WITH THE ELECTRODE PASSAGEWAY IN SAID MOUNTING STEM, (C) A CONTACT INSERT MOUNTED WITHIN AN INSERT PASSAGEWAY EXTENDING ANGULARLY OUTWARDLY AND UPWARDLY IN THE NOZZLE BODY FROM THE LOWERMOST END OF THE ELECTRODE PASSAGEWAY IN THE NOZZLE BODY, SAID INSERT HAVING A CONTACT SURFACE EXTENDING A PARALLEL TO THE ELECTRODE PASSAGEWAY FOR SLIDABLE ENGAGEMENT WITH THE ELECTRODE AND SERVING TO LOCATE THE DISCHARGE END OF THE ELECTRODE, (D) A CONTACT SHOE HAVING A LOWER END IN OPPOSED ELECTRODE GRASPING POSITION T SAID CONTACT SURFACE OF SAID INSERT, (E) A LEAF SPRING SECURED BETWEEN THE MOUNTING STEM AND THE NOZZLE BODY AND TO THE CONTACT SHOE TO SUPPORT THE CONTACT SHOE FOR LIMITED PIVOTAL MOVEMENT, (F) A BIASING LEVER SECURED TO THE CONTACT SHOE AND EXTENDING VERTICALLY UPWARDLY IN SPACED PARALLEL RELATION TO THE STEM, (G) SPRING MEANS MOUNTED BETWEEN THE LEVER AND THE STEM, AND (H) PRESSURE ADJUSTING MEANS COUPLED TO THE SPRING MEANS TO ADJUST THE PRESSURE THEREOF ON THE BIASING LEVER TO CONTROL THE GRIPPING FORCE BETWEEN THE CONTACT INSERT AND THE CONTACT SHOE.