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| Number | Title | Issue Date |
| 7525066 | Consumable electrode type welding method In a consumable electrode type welding method, while feeding a welding wire 1, a welding torch 4 is moved by a robot manipulator 9 in a direction where the welding torch 4 is pulled apart from a base metal 7, so that an initial arc... | 04/28/2009 |
| 7339135 | Welding arc stabilization process A system and method for stabilizing a welding arc is disclosed. The method of initiating the arc includes the steps of defining a wire feed speed based on a user selected wire feed speed and then abruptly reducing the wire feed speed before the wire feed speed reach... | 03/04/2008 |
| 5886315 | Blow forward contact start plasma arc torch with distributed nozzle support A translatable nozzle is supported in a contact start plasma arc torch at an aft end by a swirl ring and at a longitudinally spaced forward end by an insulative bearing member of a nozzle retainer. The nozzle is biased into contact with an electrode by a ... | 03/23/1999 |
| 5164569 | Plasma-operated cutting torch with contact starting A plasma-operated cutting torch, has a diffusion chamber and a pressure chamber. A central shaft slidably supports an electrode in the diffusion chamber for contact with the nozzle. The central shaft has an annular collar slidable in the pressure chamber.... | 11/17/1992 |
| 4952773 | Automatic arc-welding machine operating with rod electrodes and a preferred application thereof An automatic arc welding machine of the type which operates with rod electrodes. The electrodes (46), which are held in a welding head (28), are moved automatically with respect to the workpiece. The electrodes are moved longitudinally away from the workp... | 08/28/1990 |
| 4896016 | Plasma arc metal cutting apparatus with actuation spring In connection with a plasma arc metal cutting apparatus, an electrode having vertical movement within a nozzle, said nozzle having a gas supply passing therethrough, an over-center spring mechanism holding the electrode in one operating position, a switch... | 01/23/1990 |
| 4803339 | Hollow electrode and arc initiation method An improved hollow electrode 10 and hollow electrode working tip 14 for a gas tunsten arc welding apparatus is disclosed. The hollow electrode face is formed as a lune-shaped radial surface 16 having two tapered intersecting cone-shaped angled surfaces 18... | 02/07/1989 |
| 4628180 | Welding system for TIG welding TIG welding with an electronic operating scrape ignition circuit, which by lifting the welding electrode (6) is activated by an idle voltage control (7) in such a way that the welding current quickly is raised above the basic current, thereby an electric ... | 12/09/1986 |
| 4531192 | Apparatus and method for sensing a workpiece with an electrical arc Apparatus and method for sensing the topography of a workpiece with an electrical arc by measuring a parameter of the electrical arc signal as an electrode is scanned across the surface of the workpiece by a tool manipulator such as a multi-axis robot arm... | 07/23/1985 |
| 4484055 | Spot welder A welder comprises a tubular support, a collar in the tubular support and a copper-coated carbon rod in the collar which extends coaxially therein. The collar is connected through a slot in the wall of the support to an exterior operating member, said ope... | 11/20/1984 |
| 3975616 | Control circuit for automatic electric arc-welder An electrode feed motor control circuit for an automatic electric arc welder which gives improved starting. For cold starts, the electrode feed motor is instantaneously braked when the electrode first contacts the workpiece so that the electrode is lightl... | 08/17/1976 |
