Abstract: A novel gas flow control assembly for a gas fuel cutting torch is disclosed. The gas flow control assembly provides a gas-saving oxy/fuel cutting torch which may be operated in a pilot mode when the torch is not in active use. The gas flow control assembly includes an inlet end and an outlet end. The inlet end is adapted for the attachment of a fuel gas conduit and an oxygen conduit. The outlet end is adapted for the attachment of a fuel gas tube, a preheat oxygen tube and a cutting oxygen tube which provide fluid communication of fuel gas, preheat oxygen and cutting oxygen from the control body to a torch head. Passages through the control body are normally closed by biased valves having stems which extend through fluid tight seals in a top of the control body. A lever pivotally connected to the control body is arranged to simultaneously depress the stems of the valves which normally close the preheat oxygen and the fuel gas passages when the lever is manually operated to a first position.

Abstract: A curing torch specially adapted to gasoline-oxygen cutting machine and cutting machine provided with said torch.

Abstract: A hole and circle cutting attachment for use with a cutting torch includes an elongated rigid rod, an elongated pointer and elements for adjustably mounting the pointer at one end portion of the rod and extending in a generally transverse orientation relative to the rod. The cutting attachment also includes a body part having elements for adjusting the body part to any position along the rod and toward and away from the pointer and for releasably clamping on the rod. The cutting attachment further includes a clamp part mounted to the body part and adjustable relative thereto for securing a torch tip of the cutting torch between the body and clamp parts.

Abstract: A block assembly for a thermochemical scarfing apparatus which allows a greater diagonal standoff distance from the metal workpiece during preheating. The block assembly comprises a base member and an extension releasably joined to the base member, and the base member and extension include an internal network of gas distribution lines for separately delivering both oxygen and fuel gas to each of a plurality of discharge openings which are disposed in a longitudinal row along the front face of the extension. A nozzle insert is releasably mounted in each discharge opening, such that during preheating, the oxygen may be discharged from each discharge opening as a central high velocity stream and the fuel gas may be discharged as a concentric stream which coaxially surrounds the central stream, and so that the momentum of the central stream is maintained.

Abstract: A process for cutting very large solidified pools of metal and metallic structures by flame cutting by means of an improved burning bar is described. The cutting is conducted by a hot flame composed of very hot high pressure oxygen exiting from a burning bar packed with intermingled mild steel and aluminum rods. The hot flame or blast of oxygen melts and mobilizes the molten metal by creating at molten stream or jettisoned molten droplets and oxidized particles.

Abstract: A sheet material hybrid cutting apparatus has a laser beam cutting head mounted side-by-side with a plasma arc cutting head on a shuttle carrier plate movably mounted to enable positioning of either cutting head a single cutting station. The cutting heads are mounted in a punch press with a punching station offset from the cutting station to provide punching of a sheet material workpiece moved across a table by a carriage as well as contouring by either of the laser beam or plasma arc cutting heads.

Abstract: A method for deburring especially a steel strip (1) cut into slabs (1a) with the aid of an oxygen cutting torch (18) whose blast is perpendicular to one (2) of the principal faces of the strip (1). The method consists in directing, onto the principal face (3) of the strip (1) opposite the principal face (2) receiving the blast from the oxygen cutting torch (18) and in the zone for cutting up the strip (1), a blast of fluid which is inert with respect to the blast from the torch (18).

Abstract: Use of a mass flow cock with control units and pressure reducing systems results in an even output at changing exit dimensions respectively nozzle exit bores by an automatic balancing of the process volumes, reduces thereby the equipment expenditure and increases the maintenance intervals. This mass flow cock operates using a large pressure difference and an exact adjustment of a special cock piece at two diaphragms.

Abstract: A bevel cutting device for cutting a bevel in a workpiece includes a frame and a vertical cutting torch, disposed on the frame, for cutting a root face of the workpiece. At least one bevel cutting torch is provided for cutting a bevel in the workpiece. The bevel cutting torch is disposed in parallel with the vertical cutting torch in a plate-cutting direction. An inclining section is coupled to the frame and inclines the bevel cutting torch about an axis parallel to the plate-cutting direction. The inclining section includes a motor gear disposed inside a casing and a link mechanism driven by the motor gear. The link mechanism is coupled to the bevel cutting torch. A shifting section is coupled to the frame and shifts the inclining section in a direction perpendicular to the plate-cutting direction.

Abstract: By means of an extended nozzle head having several excentrical nozzle receptions although the cutting oxygen is in line with the cutting jet bores, rotation of the nozzle head or of the total lower part of the burner can bring the working cutting nozzle into correspondence with a determined cutting line; being manifold equipped the thickness of a sample slice can be between two cutting nozzles selected by rotation or a spare nozzle can be put into operation quickly in case of breakdown. The nozzles for sample cutting or replacement are covered behind a protection plate against splash and flames. The protection plate can serve as well as a guide for a save pilot flame. The flexible connection of the adjustable burner and its gas supply is performed by metallic piping accordingly shaped and dimensioned.

Abstract: Installation for cutting scrap iron by oxygen cutting.characterised in that it furthermore comprises a pit in the form of a channel filled with water disposed beneath the cutting bench, which cutting bench comprises holes in order to allow cutting slag to fall directly into the water in the pit, and in that the cutting zone, in particular the torches thereof, is completely housed inside a large leaktight container internally provided with at least one suction hood for evacuating the vapors, brown smoke and dust emitted during the cutting operation.The installation is connected to a unit for treating the smoke, for dust removal and for denitrification.

Abstract: A plate cutting device having a cutting member for cutting a workpiece vertically or aslant comprises a stand and the cutting member coupled with a hose or a cord, an end of the hose or cord being connected to a part of said stand. An inclining device for inclining the cutting member about an axis parallel to a cutting direction is provided with the plate cutting device. A swinging device is coupled with the inclining device for changing the pointing direction of the cutting member with respect to the plate cutting direction. A cutting member holder is attached to the inclining device, for holding said cutting member so as to allow it to revolve with respect to the inclining device. Therefore, when the cutting member is swung and the hose or cord begins to twist, the holder will revolve and allow the hose or cord to untwist.

Abstract: A scarfing apparatus which allows a greater diagonal stand-off distance from a slab during preheating and scarfing is disclosed. The apparatus includes a manifold and head assembly for receiving and distributing oxygen and fuel gas. Upper and lower preheat blocks extend from the manifold and head assembly. The blocks are spaced to define an oxygen scarfing slot and discharge orifice of predetermined size for receiving a flow of scarfing oxygen from the manifold and head assembly. A plurality of preheat nozzle inserts are mounted within the upper preheat block adjacent to each other in a row substantially across the width of the upper preheat block. Each nozzle insert includes a central bore through which a flow of oxygen is received from the manifold and head assembly and discharged through the insert.

Abstract: A continuous casting slab cutting apparatus is disclosed. The apparatus permits a slab to be cut from a strand of continuous casting using a synchronized strand cutting machine. A slab roller table having a set of slab rollers is positioned such that as the strand cutting machine passes over the moving strand, the cutting burner is never positioned over any of the slab rollers. Also disclosed is a system for containing and removing smoke and other gases generated by the cutting process from the strand cutting area. The containment system includes partitions and plates as well as ventilation ducts positioned at various areas within the cutting area.

Abstract: A method and apparatus are disclosed for controlling metal oxide fume generation during the oxygen-induced subdivision into smaller physical units of a body containing metal values in a control gas-enriched oxygen environment in the absence of a fuel gas.

Abstract: The device comprises a body, a support, a welding torch, a connecting means ensuring the mobility of the support and of the welding torch. The welding torch can occupy at least one working position in which the flame effects one welding position and one rest operation in which the flame is sheltered. The device also has a screen which makes the flame during passage from the rest position to the working position. The invention can be used for welding robots.

Abstract: The process consists in providing at the outlet of a cutting nozzle, a central jet of cutting liquid and, simultaneously, a concentric jet of gas around the central jet of liquid, the jet of gas having a higher speed than that of the liquid jet. Typically, the liquid and the gas have the same composition, preferably oxygen. A device for carrying out the process is also disclosed.

Abstract: A fluid cooled cutting torch includes a hollow handle, a torch butt assembly, a torch head, supply tubes for preheat gas, preheat oxygen and cutting oxygen and cooling fluid supply and drainage conduits. The torch head is adapted to interchangeably receive a premix or postmix cutting torch nozzle. The cooling supply conduit extends through the torch butt assembly and within the torch handle to a point adjacent the torch head. The cooling system provides effective cooling of the torch head and even cooling of the torch handle. The torch is easily manufactured at low cost. The torch may be readily converted from a premix torch to a postmix torch.

Abstract: The present invention concerns a cutting head made of a cutting nozzle (2) with cutting oxygen duct (6) having radial ribs (11), the assembly being force fitted in a sheath (3) thus forming ducts of oxycombustible mixture (32). This nozzle which produces an improved heat dissipation can be made of reduced dimensions.

Abstract: Apparatus for the opto-electronic control of a flame cutting machine having photoelectric sensors of different spectral sensitivity. The sensors may be positioned within a cutting torch and directed during operation on a flame and a workpiece to be cut. The sensors are connected at their outputs with computing means to generate control signals for the advancing movement of the cutting torch relative to the workpiece. In order to reduce the impact of disturbing variables on the control signals, an electronic means for generating the quotient of the sensor output signals is connected with the outputs of at least two of said sensors. The quotient of the output magnitude of the sensors is used to control the flame cutting machine.

Abstract: The present invention relates to an exothermic cutting electrode. The electrode includes an outer hollow conductor, an inner conductor disposed inside the and outer hollow conductor. The inner conductor is configured so as to form the boundaries of two chambers and configured to form a third chamber between the outer hollow conductor and an inner conductor. The three chambers are of substantially equal cross-sectional size whereby even gas flow is proudced and even consumption of the electrode is provided.

Abstract: The invention concerns a cutting torch for iron and steel metallurgy which is provided with two oxygen cutting ducts, ending in two housings, for receiving two cutting inserts, or a heating nozzle and a cutting insert. In this manner, there is obtained a torch which may very rapidly be converted into a cutting torch with high heating capacity and single cutting jet, or into a cutting torch with high cutting speed provided with two cutting inserts.

Abstract: An exothermic cutting torch includes a first cylindrical member receiving a second member therein. The second member includes radially extending portions formed by axially extending grooves. A first passage having plural passage portions is defined between the first and second members for conveying an oxidizing gas from a supply end to a combustion end of the cutting torch. Each of the radially extending portions defines a second passage portion also for conveying oxidizing gas to the combustion end. The second member engages an inner peripheral portion of the first member as a result of a stretch reducing operation to fuse the members together. A third passage may also be defined along the central axis of the torch if desired.

Abstract: In autogenous cutting oxygen in liquid form is put under high pressure and flows to the cutting site through a liquid jet cutting nozzle. An increase in the cutting speed and in the cutting quality level is achieved in that the super-cooled liquid oxygen jet emerging from the nozzle has a temperature that is below the boiling temperature of the oxygen at ambient pressure.

Abstract: The invention relates to an apparatus for making divergent cuts chamfered relative to a cutting surface, e.g. welding chamfers, by means of torch cutting particularly in the internal cutting of cylindrical sheets, such as pipes. The apparatus comprises a torch (8) mounted on a fastening arm (2) at the end of a carrier arm (1), said carrier arm (1) being axially movable and rotatable around its axis. The fastening arm (2) at the end of carrier arm (1) is fitted with a transverse support arc (3), which carries an element (4) movable along an arcuate path and fitted with a longitudinal support arc (5), the latter carrying a mounting plate (6) for torch (8), the plate being movable along an arcuate path. The radii of the arcuate paths of support arcs (3, 5) are equal and their centers are equally far from the center line of carrier arm (1) at an axial distance from each other.

Abstract: A liquid-jet cutting torch for cutting with liquid oxygen, includes a cutting-oxygen line surrounded all the way to the outlet of the cutting nozzle by a cooling-medium line, by a vacuum insulation and by a cooling-water casing.

Abstract: With a band casting-setting-burn-cutting machine in a line-like layout, to thermochemically separate from raw material of great width and thickness to roll out sheets of steel, in particular with high finishing speeds, is presented an attachment system; that without touching or with just the smallest stress through a measuring roller (2) or through an in- or on-attaching system regulates the simultaneous speeds between the band-like material (1) and the band casting-setting-burn-cutting machine (3) for the burn-cutting to be effected.

Abstract: A billet cutting apparatus of the type including an oxy-fuel cutting torch includes a slag removal nozzle operative simultaneously with the cutting torch to direct a jet of oxygen along the lower edge of the billet to remove slag beads tending to form thereon. The oxygen nozzle has a unique opening configuration which provides a thin, flat oxygen stream effective over a substantial distance, such that the nozzle can be mounted laterally of the billet and outside the hostile and potentially damaging environment created by the cutting torch and the hot billet. The nozzle may be conveniently mounted in a fixed position and, in an automated billet cutting apparatus, may be attached directly to one of the billet clamping arms.

Abstract: A cutting oxygen flow control valve in a cutting torch has a poppet movably positioned in a cutting oxygen passageway upstream of a valve seat. The poppet has openings at a downstream end of the cylindrical wall thereof so that these openings are exposed upon movement of the poppet as a manually controlled diaphragm lifts off the valve seat. The progressive exposure of the openings provides for cutting oxygen flow past the valve, thereby producing a desired progression in the flow rate.

Abstract: An igniter is provided for slip-on attachment to the free end of a thermal lance. The igniter includes a slip-on cartridge having a frictional support cap. A priming composition (12) and a primer (13) located within the cartridge. The primer (13) is designed as a friction primer and includes a spiral wire friction element within the primer and connected to the cap. Under the pressure of oxygen introduced into the lance, the cap is forced outwardly with the wire friction element activating the primer to create ignition of the priming composition (12), and the operation of the thermal lance.

Abstract: The invention relates to a laser cutting nozzle comprising at least two subsequent coaxial sections, the inside diameter of the first section decreasing from its inlet diameter to its outlet diameter and being devoid of a sharp corner, the inner envelope being tangent at its outlet to a cylinder having a diameter d, the second section being cylindrical and having a diameter D and a length l, the ratio D/d being between 1.1 and 1.3 and the ratio l/d being between 0.35 and 1. It relates to a laser cutting head comprising this nozzle and to a laser cutting method employing these elements.

Abstract: In longitudinal cutting of continuous castings with high pressure, liquid stream cutting tips, a preheating torch conducted to the liquid stream cutting tip is used for heating up to the ignition temperature.

Abstract: An apparatus is disclosed for removing the dross ridges which may be formed on the sides and ends of a metal workpiece during torch cutting of the workpiece. The apparatus includes a workpiece support table and a pair of workpiece transport devices for moving the workpiece both transversely and longitudinally on the table. A plurality of aligned and pivotally mounted cutting blades extend along each side of the table, and a pair of pivotally mounted transverse cutting blades are mounted adjacent respective ends of the table. In operation, the workpiece is moved over the blades along each side of the table, and also over both of the transverse blades, and such that the blades engage and remove the dross ridges along the two sides and the two ends of the workpiece.

Abstract: An exothermic cutting electrode or burning bar having an oxidizable metal fluid conduit (tube) surrounded by alternate layers of wire wound helically in opposite directions, the entire structure covered with an outer oxidizable metallic tube, either end of the electrode being adapted for connection to a source of oxidizing fluid and electric current, so that an arc can be struck between a work-piece and the free end of the electrode to produce a cutting flame. By proper selection of the type and size of materials of construction the electrode will burn after the electric current has been turned off.

Abstract: An apparatus and method are disclosed for removing the dross ridges which are formed on the lower surface of a metal workpiece during torch cutting of the workpiece. The apparatus includes a cutting blade having a generally flat outer surface and a cutting edge along each of its two opposite sides. The blade is positioned to extend across and below the workpiece path of travel, and the blade is rotatable between a neutral position wherein the blade is below the pass line of the workpiece, and opposite tilted positions in which one or the other of the cutting edges engages the lower dross carrying surface of the workpiece, and so that each cutting edge is adapted to engage and remove a dross ridge on the workpiece.

Abstract: An oxygen cutting device comprising two cutting oxygen jets conducted through passageways with a passageway therebetween for a carburizing flame ensuring a reheating at depth of the rough-cut kerf which is effected by the first cutting oxygen jet and is finished by the second cutting oxygen jet.

Abstract: The cutting tip of a conventional oxy-fuel cutting and welding torch is replaced by the adaptor of the invention to convert the torch for using exothermic cutting rods or electrodes for erothermic cutting.

Abstract: A gas torch comprises a body with at a first end adjuster valves for connection to fluid supplies and at a second end a torch tip. At the first end there is a support from which the body extends to the tip. The body is made up of sections of rigid tube articulated and connected to each other by articulation and fluid passage connection devices. These ensure continuity of fluid circulation between the sections of tube. The sections of tube near the support are articulated to the support by articulation and fluid passage connection devices enabling them to be connected to the valves. Maneuvering means are articulated to the supports and to at least the sections of tube near the support so as to enable remote displacement of the tip. The tip is supplied with fluid by some at least of the articulated sections of tube constituting the body.

Abstract: A manual gas cutting torch to be used for fusion-cutting iron materials such as steel frames or iron plates includes a flame port at its cutting tip, a plurality of ports connected with gas and oxygen cylinders at its rear edge, and a handle section for holding the torch with one hand at its middle. A freely detachable back-fire preventive device is incorporated into a gas channel or oxygen channel or to both channels which shift(s) to the cutting tip side from this handle section. The back-fire preventive device serves to stop any flash-back from the cutting tip just before the handle section for preventing the flame from passing through the handle section and escaping back to the cylinder.

Abstract: A hand-held thermal cutting torch of the plasma arc or oxyfuel type commonly used for cutting metal workpieces such as steel plates, employs a new concept of motorized driving to provide more uniform cutting rates and improved quality of cut. A driving element coaxially surrounding the cutting torch nozzle includes an annular surface for engagement with a template guide surface, the driving element being rotatably mounted and driven from an electric motor that is carried in the handle of the cutting torch.

Abstract: A process for autogenic flame cutting with oxygen includes bringing the oxygen while in the liquid state to a high pressure and feeding the oxygen to the cutting location via a liquid jet cutting nozzle.

Abstract: A safety arrangement useful in burning and cutting torches and like devices wherein the torch utilizes an oxidizer medium and a fuel which is supplied to the torch at selected pressure and where the fuel and oxidizing medium are independently provided to the torch and mixed therein where the present invention includes a valve assembly having two spool valves moveable within the valve assembly and where the valve assembly receives the oxidizer media, the fuel media, and a extinguisher medium which is supplied at least a selected pressure to hold the spool valve assembly in a first mode so that oxidizer means and fuel medium can be supplied through the valve assembly to the torch and where upon reduction of the pressure of the extinguisher medium below a selected pressure the valve assembly reverts to a second mode and where the flow of oxidizer medium and the flow of fuel medium are shut off and where in the event of a fire the spool assembly can be moved to the second mode and the extinguisher medium supplied

Abstract: The invention relates to a steering mechanism for an autogenous cutting torch, wherein an autogenous cutting torch (5) is fastened to the end of a steering arm (2) shaped as a long shaft. Steering arm (2) is adapted to be axially movable and rotatable around its axis. In order to control the movements digitally at a desired, readily variable ratio of dependence or alternatively in cycles of desired duration, digitally controlled motors are operated, the first motor (9) rotating a gear (11) surrounding said steering arm (2). This gear (11) drives steering arm (2) therealong but steering arm (2) is axially movable relative to gear (11). Said gear (11) is fitted with a second digitally controlled motor (16), a gear (15) driven thereby being meshed with a toothed rack (2, 14) provided by the steering arm itself, for producing said axial movement.

Abstract: A semi-automated beam cutting machine simultaneously cuts with two torches the flanges of the beam in a presettable plane in each of two axis. The web of the beam is cut with a further torch in response to a template, to obtain two rat holes and the inset web edge. Independent angular reorientation in a third plane of each of the flange cutting torches accommodates for lack of perpendicularity between each flange and the web to obtain a true edge and a constant width angle cut. The ends of two beams formed from a single beam can be cut in a single operation with appropriate adjustments to the machine. A method for performing various end cuts of a beam is disclosed.

Abstract: Exothermic cutting is facilitated by using an electrode fabricated from a single elongated strip of metal roll formed into a generally cylindrical elongated electrode shape. Electrodes can be continuously formed to length by randomly coining the strip before roll forming to facilitate breaking of individual electrodes from the roll formed product.

Abstract: A flame cutting apparatus is disclosed which has been particularly configured for coping the end portion of a structural steel I-beam workpiece. The apparatus includes a roller conveyor for receiving the workpiece, and a frame positioned in association with the conveyor. A first carriage is provided which is movable along the frame in a direction parallel to the longitudinal axis of the workpiece. A pair of second carriages are provided on the first carriage, and are movable therewith, with the second carriages further being movable relative to each other in a horizontal direction transverse to the workpiece. Each of the second carriages is provided with a pair of flame cutting torches, with arrangements provided for further moving the torches vertically with respect to the workpiece. Associated automatic controls operate the apparatus such that movement of the cutting torches along three axes is effected for coping the workpiece.

Abstract: A device in a cutting torch which comprises a torch body with a valve housing and a nozzle and with a cutting oxygen duct, a heating oxygen duct and a combustion gas duct disposed in the torch, there being disposed in the torch a connection line which contains a throttling member between the heating oxygen duct and the cutting oxygen duct and wherein disposed in the cutting oxygen duct before the connection line is a valve member which permits a flow of heating oxygen to pass through the cutting oxygen duct only in the direction towards the orifice of the nozzle.The connection line between the heating oxygen duct and the cutting oxygen duct comprises at least one cooling oxygen duct (7) disposed in the nozzle which is elaborated with three sealing surfaces towards the torch body.

Abstract: An apparatus for cutting a steel profile, profile bar, and the like comprises a roller conveyor, at least one driven feed roller, a cutting torch mounted behind the driven feed roller in a positive feed direction, and a burr removal device. A workpiece lying on a roller press is movable in both the positive and the negative feed direction. The cutting torch is movable transverse to the feed direction. The burr removal device comprises a burr-removal shaft with a milling member, which is mounted behind the driven feed roller in the positive feed direction. The burr-removal shaft extends over the entire width of the roller conveyor.

Abstract: Apparatus for mounting a tungsten electrode in acute relation to the flame of an oxy-fuel cutting torch and permitting the rotation of the electrode during heating, such that the material is vaporized and removed as the electrode is shaped to a needle-like profile. A bearing containing clamp member secures the torch and electrode holder in proper relation to one another and permits the rotation of the electrode holder therein.

Abstract: An oxygen-fuel welding and cutting assembly, and medical assembly, with regulators which comprise control valves with flow rate dials and pressure dials, a cabinet which can be mounted to a cart for oxygen and fuel tank cylinders, the cabinet has mounts for rigidly supporting the regulators within the cabinet, the cabinet has passageways permitting hoses from the oxygen and fuel cylinders to extend therethrough and be connected to the regulator inputs, and to allow passage of hoses connected to the regulator outputs so that the hoses can be wrapped around cart hose mounts and then extend through a cabinet passageway to be connected to a torch body releasably mounted within the cabinet, the cabinet has mounts for holding torches and torch tips, the cabinet has a movable door which allows the torch body to be pulled thereout, when the torch body is moved to an operation site the torch body hoses are pulled through their cabinet passageway and out the cabinet door, the cabinet has a screened section permitting v