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| Number | Title | Issue Date |
| 7371994 | Buried arc welding of integrally backed square butt joints Buried arc welding is employed to fuse together a first component, a second component, and a third component or an underlying portion of the second component, the first and second components in butting relationship along a butting joint and the third component or un... | 05/13/2008 |
| 7186947 | Process monitor for laser and plasma materials processing of materials A method for monitoring the processing of a workpiece includes directing an incident laser beam onto the workpiece and measuring a signal emitted from the workpiece. At least two signals are generated by a detector based upon the emitted signal. A workpiece processi... | 03/06/2007 |
| 6968240 | Method for controlling process parameters to achieve constant process conditions A method for controlling process parameters to achieve constant process conditions, including studying the actual data and reference data independent of time and applying them one on top of the other so that, in the case of optimum match, a 45° straight line is ach... | 11/22/2005 |
| 6947802 | Centralized control architecture for a laser materials processing system Apparatus, systems, and methods for monitoring the processing of a workpiece that includes directing an incident laser beam onto the workpiece and using an optical detector for measuring a signal emitted from the workpiece as a result of the incident laser beam. The... | 09/20/2005 |
| 6932879 | Method of weldbonding An improved method of weldbonding utilizing inclusion bodies, placed directly between materials to be bonded or included in a weldbonding adhesive. The inclusion bodies maintain a gap between the materials to be welded which provides a gas releasing egress route to ... | 08/23/2005 |
| 6903300 | Method for thermally working a workpiece, thermal working machine therefor, and cutting or welding tool suited for use in the working machine A thermal working tool (1) is movable along a workpiece surface (7) and includes a torch head (2) which has exchangeably mounted thereon cutting or welding tools (3; 4; 5) extending between the torch head (2) and the workpiece surf... | 06/07/2005 |
| 6794607 | Tig torch finger eliminator The Tig Torch Finger Eliminator is attached to a tig torch to aid in welding pipes. It eliminates the use of the welder's fingers as a guide to stop tungsten contamination. It can be used in all positions of welding a pipe, and will take all the work out of walking ... | 09/21/2004 |
| 6744012 | Control method of arc welding and arc welder A control method for arc welding wherein position control of an electrode or a torch is performed while adjusting welding conditions on the basis of optical information obtained from arc light generated during an arc welding process. Illuminance, which forms the opt... | 06/01/2004 |
| 6501042 | Apparatus and process for assembling exhaust processor components An apparatus and method for producing an exhaust processor comprising: a clamping device for applying a predetermined clamping pressure to clamp a case or other component of the exhaust processor about a substrate or other component of the exhaust process... | 12/31/2002 |
| 6337789 | Spark gap assembly for welding power supply A spark gap assembly includes two conductive spark gap points forming a spark gap. Two substantially identical, non-conductive, molded plastic pieces are clamped together to make a housing with at least one cylindrical receptacle for the spark gap points.... | 01/08/2002 |
| 6292714 | Robot cooperation device, and robot cooperation program storage medium A robot control part connected to a robot moving according to control for controlling the motion of the robot; and a media reproduction part to keep scenarios which describes changes in images to the passage of time, and are corresponding to events, prese... | 09/18/2001 |
| 5900169 | Safety circuit for a blow forward contact start plasma arc torch A safety circuit is utilized in a blow forward contact start plasma arc torch to extinguish the current to the torch upon determination of an unsafe operating condition. The torch includes a torch body, an electrode and a translatable conductive nozzle bi... | 05/04/1999 |
| 5844196 | System and method for detecting nozzle and electrode wear A system and method for detecting nozzle and electrode wear of plasma arc torches in which the average change in the stand-off between the electrode or the nozzle assembly of the plasma arc torch and a workpiece is monitored, and corrective measures are t... | 12/01/1998 |
| 5841105 | Automatic mig welding torch and method of assembly An improved automatic MIG welding torch assembly for use in automated welding environments includes a locking feature to provide an anti-rotational fit between a power adapter and a conductive inner body tube of a welding torch. The conductive inner body ... | 11/24/1998 |
| 5798493 | Fixed welding apparatus and method Fixed welding apparatus includes a torch body, a pusher rod, a reverse collet, and a collet. The pusher rod is slidably received within an opening formed through the torch body. A portion of the reverse collet is positioned in an opening formed in the pus... | 08/25/1998 |
| 5694046 | Method and apparatus for monitoring thermal processing of a workpiece in accordance with a measured capacitance frequency distribution A method and apparatus for monitoring thermal processing of a workpiece using a sensor electrode which can be positioned relative to the workpiece and to which an alternating electric signal is applied in order to determine a measured capacitance (Cm... | 12/02/1997 |
| 5521350 | Stand-off control apparatus for plasma processing machines A stand-off control apparatus for plasma processing machines which is capable of maintaining an optimum stand-off even when a processing speed varies. In a stand-off control apparatus for plasma processing machines which is provided with a microcomputer (... | 05/28/1996 |
| 5191185 | Girth and seal welding apparatus A welding apparatus is disclosed for seal welding closed the bore of a sealing plug which is positioned adjacent the end of a hollow tube and where the bore defines an axis in communication with the tube. The apparatus includes a head with an end stop mem... | 03/02/1993 |
| 5187348 | Weld electrode-to-workpiece arc gap setting apparatus and method An apparatus for setting an arc gap between a weld electrode and a workpiece includes a control arrangement and a direct current stepping motor operated in a forward mode by the control arrangement to move the weld electrode toward and away from the workp... | 02/16/1993 |
| 4943701 | Apparatus for and method of detecting arc length, apparatus for and method of controlling welding torch height, and automatic welder and automatic welding method An apparatus for automatically controlling the welding condition or the welding torch position in arc welding which makes use of a welding power source of constant-voltage or constant-current type. The apparatus has an oscillator for superposing a signal ... | 07/24/1990 |
| 4935597 | Process and a device for finding and following a hollow weld in shielded arc welding The invention concerns a process and a device for seeking and following a hollow weld during a shielded arc welding, especially welding with carbon dioxide gas. The welding torch is moved by a path-controlled manipulator, whereby prior to the welding the ... | 06/19/1990 |
| 4821202 | Apparatus microprocessor controlled welding A microprocessor-controlled arc welding power supply. A silicon controlled rectifier ("SCR") bank is used to generate a direct current arc welding current under program control. Positive synchronization is provided by the microprocessor using a phase lock... | 04/11/1989 |
| 4810966 | Inductive sensor arrangement and measuring arrangement for use thereof The sensor arrangement according to the invention serves to determine the spacing from a non-magnetic or ferro-magnetic article. In addition, it seeks to make it possible to determine the relative position of the sensor with respect to irregularities on t... | 03/07/1989 |
| 4795882 | Torch positioning apparatus A torch positioning apparatus controls a torch as it moves downward at a relatively rapid rate toward a work piece until it trips a proximity switch, causing the rate of travel of the torch to be slowed. The torch continues its travel until it strikes the... | 01/03/1989 |
| 4794232 | Control for gas metal arc welding system An arc welder control in which the current is pulsed between a high level and a low level. The high level pulse is maintained until a selected energy condition is satisfied. The low level pulse is maintained to satisfy an average energy condition. A proxi... | 12/27/1988 |
| 4766286 | Arc length control for plasma welding For use with plasma arc welding apparatus, a control system is set forth. The plasma arc welding apparatus includes a plasma arc power supply (12), a contactor (20), and an electrode assembly for moving the electrode (32) relative to a work piece (22). Th... | 08/23/1988 |
| 4721844 | Electric arc welding process for filling a weld groove to a predetermined extent In order to maintain the degree of filling of weld seams constant, especially those seams having a changing size of the cross section of the weld groove, in arc welding, the spacing of the welding gun from the workpiece is kept constant, the welding amper... | 01/26/1988 |
| 4682004 | Measuring arrangement having a capacitive measuring electrode and a working tool with integrated electrode In a measuring arrangement for measuring or regulating spacing on thermal working machines (for example, flame cutting installations), two capacitive electrodes are arranged at different spacings from the workpiece. Interference signals can result from ch... | 07/21/1987 |
| 4636610 | Feed length control device for consumable electrode welding operations A feed length control device for a consumable electrode type welding machine in which the feed length of the electrode is made constant, making the resulting welds satisfactory and with a deep weld penetration. In accordance with the invention, the start ... | 01/13/1987 |
| 4463298 | Instrument for keeping the distance constant between a tool and a workpiece to be processed An instrument for maintaining a constant distance between a tool, such as a cutting torch, and a workpiece includes a sensing electrode connected to two different phase control system-building blocks one of which functions as an oscillator having its outp... | 07/31/1984 |
| 4439665 | Arc welding apparatus having pivotably mounted electrode carriage An arc welding apparatus is disclosed wherein an electrode carriage is mounted to occupy two positions relative to a lead screw-threaded sleeve assembly which carries the electrode carriage toward or away from a workpiece. Direction of lineal movement of ... | 03/27/1984 |
| 4439664 | Welding apparatus wherein physical contact of welding electrode with workpiece is mechanically sensed An improved welding apparatus having an electric motor driven electrode carriage assembly, is disclosed. The carriage assembly is capable of carrying the electrode either towards or away from a workpiece depending upon the direction of rotation of the ele... | 03/27/1984 |
| 4435631 | Method and device for controlling the length of an electrical arc in an arc generating machine In accordance with the method, the arc supplying current is modulated if necessary for generating an acoustical signal. The acoustical signal generated by the arc is detected and its amplitude which, in practice, is a direct function of the actual length ... | 03/06/1984 |
| 4415795 | Torch support and height sensor apparatus for shape cutting machines This invention provides an improved method for employing a plasma-arc cutting torch to cut a metal plate. The improvement consists in operating the torch with its lower portion submerged in a layer of water provided over the workpiece. In order to allow a... | 11/15/1983 |
| 4403130 | Position detector and machining apparatus including same A position detector comprises a probe having an enlarged head which can be engaged with a workpiece to be machined by a machine tool. The probe is slidably mounted in a holder for rectilinear movement relative thereto along an axis and its translational d... | 09/06/1983 |
| 4400610 | Automatic fillet weld tracing mechanism Disclosed is an automatic fillet weld tracing mechanism for two materials to be welded which are arranged stepwise and parallel to each other. A first motor driving mechanism is positioned at a fixed height and vertically reciprocates a first driven membe... | 08/23/1983 |
| 4385223 | Circuit for use with arc voltage controllers in AC gas tungsten arc welding A signal conditioning circuit for providing a DC voltage to an arc voltage controller for controlling the length of an AC arc of a gas tungsten arc welder. Specifically, a first control circuit is employed which charges to a first value by a signal of a g... | 05/24/1983 |
| 4365132 | Welding apparatus for polygonal cross-sectioned tubing A welding apparatus which is designed to weld together tubular members having any exterior configuration. The welding electrode is mounted on mounting structure which in turn is movably mounted upon the periphery of a housing. The workpiece to be welded i... | 12/21/1982 |
| 4363468 | Cutting torch height control apparatus An apparatus (10) for controlling the height of one or more cutting torches (12) above a workpiece (14). The apparatus (10) senses the actual height of the torch (12) above the workpiece (14) and compares the actual height with a desired reference height.... | 12/14/1982 |
| 4345131 | Method and apparatus for electrode tool wear compensation A method and apparatus for compensating for the wear of an electrode tool during machining by EDM of an electrode workpiece by the electrode tool. During penetration of the electrode tool into the electrode workpiece, relative displacement of the electrod... | 08/17/1982 |
