Abstract: A radical generation device includes: a cylindrical tube; an antenna; an outer conductor part; and a connection part which has a double cylindrical tube structure including an inner cylindrical body and an outer cylindrical body, end portions of the inner cylindrical body and the outer cylindrical body on the same side are divided in a circumferential direction notches extending in an axial direction to form divided pieces, and tapered portions swelling outward toward a tip end are formed on an outer side of the divided pieces or tapered portions swelling inward toward a tip end are formed on an inner side of the divided pieces.

Abstract: An inductively coupled plasma (ICP) torch is described that includes a tapered outer end. A system embodiment includes, but is not limited to, a tubular sample injector configured to receive an aerosolized sample in an interior defined by walls of the tubular sample injector; an inner tube surrounding at least a portion of the tubular sample injector to form a first annular space between the inner tube and the walls of the tubular sample injector, the inner tube defining at least one inlet port for introduction of an auxiliary gas into the first annular space; and an outer tube surrounding at least a portion of the inner tube to form a second annular space, the outer tube defining at least one inlet port for introduction of a cooling gas into the second annular space, the outer tube having a flared region at an outlet of the outer tube.

Abstract: The invention relates to a microwave driven plasma ion source (1) for ionising a sample to be ionised to sample ions, the microwave driven plasma ion source (1) including a sample intake (6) for inserting the sample from an outside of the microwave driven plasma ion source (1) into an inside (3) of the microwave driven plasma ion source (1): a microwave generator (10) for generating microwaves for generating a plasma (101) from a plasma gas (100): a plasma torch (20) providing a plasma torch orientation direction (29) having an inside (21) for housing (2) a process of generation of the plasma (101) from the plasma gas (100) and for housing a process of ionising the sample to the sample ions by exposing the sample to the plasma (101), wherein the plasma torch (20) comprises a torch outlet (22) for letting out the plasma (101) and the sample ions from the inside (21) of the plasma torch (20) essentially in the plasma torch orientation direction (29) to an outside of the plasma torch (20), the torch outlet (22)

Abstract: Plasma nozzle includes a nozzle body arranged to engage with a thermal spray gun. The nozzle body includes an axial through bore having up-stream input orifice and a down-stream nozzle exit, at least one material injector positioned between the up-stream input orifice and the nozzle-exit, said at least one material injector being configured to introduce a feedstock material into a gas flow passing through the axial through bore and at least one gas injector configured to introduce a shroud gas flow into the axial through bore and being located at a position up-stream of said at least one material injector.

Abstract: The present application relates to a welding system comprising a main module provided with an outer casing identifying an input port for the connection to a source of external electrical power, an electric generator configured to adapt the electrical characteristics of said electrical power to a first type of welding, at least an output port for the connection to a welding torch, an electronic control unit configured to control the functionality of said electric generator. Said main module comprises a mechanical and electrical connection unit of a first type, said welding system comprising at least an auxiliary module provided with an outer casing identifying an electric generator configured to adapt the electrical characteristics of an electrical power to a second type of welding, at least a mechanical and electrical connection unit of a second type couplable to said mechanical and electrical connection unit of a first type.

Abstract: Design advances for improving the performance of a plasma torch. The use of one or more of various advances described herein can improve the efficiency and effectiveness of the torch, the reactor and the manufacturing process. The use of the torch with hydrogen plasma gas, natural gas feedstock, and carbon black production are also described.

Abstract: A method for determining operating parameters to process a workpiece using a manufacturing processing system including a plasma arc gouging torch. The method includes positioning a plasma arc gouging torch at a location relative to a workpiece and determining a start point and an end point for each gouging path based on the location and a gouge profile. The method further includes using the gouging profile to determine first operating parameters for the plasma arc gouging torch for a first gouging path and determining second operating parameters for the plasma arc gouging torch for a second gouging path based on the gouge profile and the first gouging path. The second operating parameters include at least one of a second torch speed or a torch offset. The method also includes using at least one of the first or second operating parameters to process the workpiece with the plasma arc gouging torch.

Abstract: A laser cutting head uses a nozzle and gas flow to perform laser cutting or the like. The laser processing and the gas flow passes from an end of the housing. A sensor assembly affixed to the end of the housing has a first through which the laser processing passes and an orifice from which the gas flow passes. A conductive adapter affixes to the sensor assembly and has a passage through which the laser processing passes. The nozzle affixes in a receptacle in an end of the conductive adapter. A collar disposed about the adapter defining one or more gas flow passages therethrough. A cover is disposed between the sensor assembly and the collar and encloses a space communicating the gas flow from the orifice to the one or more flow passages of the collar.

Abstract: An electrical connector is disclosed. The electrical connector includes a multi-diameter power pin having a proximal portion having a first diameter; an engagement portion having a second diameter smaller than the first diameter; a bearing portion having a third diameter smaller than the second diameter; and a threaded distal portion having a fourth diameter smaller than the third diameter. A receiving block having a multi-diameter through hole is configured to receive the multi-diameter power pin. The receiving block includes a plurality of gaps extending radially from the multi-diameter through hole to an outer surface of the receiving block, a receiving portion disposed between a lateral surface of the receiving block and a first gap of the plurality of gaps; and a clamping portion disposed between the plurality of gaps.

Abstract: A gas conducting unit for a gas-cooled plasma cutting torch, wherein the gas-conducting unit is single-part or multi-part tubular or annular. The gas-conducting unit comprises a single-part or multi-part tubular or annular gas-conducting unit body with a longitudinal axis L1. In a wall of the gas-conducting unit body, there are situated at least one opening, which is inclined by an angle ? in a range of ±15° with respect to the longitudinal axis L1, and at least one second opening, which is inclined radially with respect to the longitudinal axis L1 or which, in a radial plane, is inclined at an angle ? in the range of ±30° from the radial to the longitudinal axis L1.

Abstract: A device including an electroceramic component having a first area and a second area, a potting compound at least partially surrounding the electroceramic component, and a sleeve-shaped housing which at least partially surrounds the potting compound. The housing has, in a first housing section that surrounds the potting compound in the first area of the electroceramic component, a material wherein the thermal conductivity of said material is greater than the thermal conductivity of a material of the housing in a second housing section. The housing in the second housing section surrounding the potting compound in the second area of the electroceramic component includes a non-conductive material.

Abstract: Consumables for cutting torches include consumables that define a parallel plasma channel and/or a steep, elongated plasma chamber. Additionally, the consumables may define smooth, rounded edges between different geometries of the plasma channel (e.g., at transitions between straight and angles sections) and/or between the plasma channel and the plasma chamber. That is, the consumables may provide a plasma channel that does not converge, diverge, or define any corners and/or a plasma channel that transitions to the plasma chamber without defining any corners.

Abstract: Systems and methods of making carbon particles with thermal transfer gas. A method of making carbon particles may comprise heating a thermal transfer gas by Joule heating and contacting the thermal transfer gas with a reactive hydrocarbon feedstock gas to generate the carbon particles and hydrogen gas. A method of making carbon particles may comprise heating a thermal transfer gas with the aid of Joule heating and mixing the thermal transfer gas with a hydrocarbon feedstock gas to generate the carbon particles.

Abstract: A plasma arc torch includes a nozzle body, a nozzle extending from the nozzle body, and a shield cap. An outer retaining cap is attached to the plasma arc torch and secures the shield cap to the plasma arc torch. A sleeve is located radially outward from the outer retaining cap and is configured to receive a flow of pressurized gas. An insulator is located between the outer retaining cap and the sleeve. At least one of the sleeve and the insulator forms a gas flow channel configured to direct a gas flow from the sleeve to a distal portion of the outer retaining cap.

Abstract: The invention relates to an electrode for an especially gas-cooled plasma torch, in particular plasma cutting torch, the electrode comprising: an elongated electrode body with an open end and a closed end, the ends defining a longitudinal axis L, and an emission insert in the closed end, a cavity extending in the electrode body from the open end of the electrode body towards the closed end, the cavity fluidically communicating with the outer face of the electrode body which is radial with regard to the longitudinal axis, via at least one opening in its wall or in the front solid portion of the closed end. The invention further relates to a system consisting of said electrode and cooling tube, to a gas conducting unit, a plasma torch comprising same, a method for conducting gas in a plasma torch and a method for operating the plasma torch.

Abstract: A waste conversion apparatus and a method of implementing the apparatus are provided. The apparatus includes a control system, and a feedstock analysis system or output analysis system. A plasma forming device within a reactor of the waste conversion apparatus is controlled by the control system to apply a plasma arc to a supply of waste feedstock supplied to the system. Integrated feedback control is provided to the plasma forming device based on an analysis by the feedback analysis system to characterize of the supply of waste feedstock, and/or an analysis by the output analysis system to characterize a gas product from the reactor.

Abstract: The high-frequency amplifier assembly for a high-frequency generator, in particular for a high-frequency generator for operating a plasma generator, is provided with a signal generator for generating a high-frequency signal; a first amplifier transistor for amplifying the signal generated by the signal generator; an output terminal for outputting the amplified signal to an external load; an input network arranged between the signal generator and the first amplifier transistor for providing the high-frequency signal at the input of the amplifier transistor; an output network arranged between the amplifier transistor and the external load for providing a desired load impedance for the amplifier transistor; and an electronic voltage-limiting assembly arranged at the output terminal for limiting the output voltage at the output terminal.

Abstract: A silver-copper cutting electrode assembly, and method of manufacture is provided with optimized attributes to allow for improved durability, integrity and manufacturability. An electrode has a silver tip portion which is brazed to a copper body portion where the silver portion and joint have a particular structural relationship.

Abstract: An adapter for a plasma arc torch comprising a torch body is provided. The adapter includes a body defining a longitudinal axis between a proximal end and a distal end and at least one protruding portion extending from the proximal end of the body. The at least one protruding portion is configured to be inserted into a cavity of the torch body to physically engage a switch inside of the cavity. The engagement of the switch is adapted to indicate installation of a consumable component in the plasma arc torch.

Abstract: Mist management systems are configured for a processing machine having a portioning station configured to portion a workpiece within an enclosed portioner housing having a first side wall extending along the portioning station, a second side wall, at least one hood portion between the first side wall and the second side wall, and at least one end wall between the first side wall and the second side wall, using at least one liquid jet cutter and a conveyor configured to move the workpiece in a longitudinal direction beneath the at least one liquid jet cutter.

Abstract: A torch head for a liquid-cooled plasma arc torch is provided. The torch head includes a torch body and a torch insulator, coupled to the torch body, having a substantially non-conductive insulator body. The torch insulator includes (i) a first liquid coolant channel, disposed within the insulator body, configured to conduct a fluid flow from the torch head into a consumable cartridge along a first preexisting flow path, (ii) a first liquid return channel, disposed within the insulator body, configured to return at least a portion of the fluid flow from the cartridge to the torch head along the first preexisting flow path, and (iii) a gas channel, disposed within the insulator body, configured to conduct a first gas flow from the torch head to the cartridge along a second preexisting flow path. The first and second preexisting flow paths are fluidly isolated from each other.

Abstract: A system for propelling a nanosatellite, including a pair of separated electrodes defining an ignition space therebetween a power source operationally connected to the pair of separated electrodes. Also included is a liquid propellant reservoir a pump reconnected in fluidic communication with reservoir and the ignition space and an electronic controller operationally corrected to the power source and to the pump.

Abstract: A torch tip is provided for a liquid-cooled plasma arc cutting torch. The torch tip includes an electrode with an elongated electrode body having a distal end and a proximal end extending along a longitudinal axis. The electrode body includes at least one interior threaded connection at the proximal end for engaging a liquid-cooled electrode holder. The electrode holder comprises a liquid coolant channel that does not extend into the electrode body. The electrode body has (i) a length extending along the longitudinal axis and (ii) a diameter associated with a widest portion of the electrode body along the longitudinal axis between the proximal and distal ends, where a ratio of the length to the diameter of the electrode body is greater than about 5.

Abstract: A three-dimensional laser machine includes a machine head, a controller for positioning the machine head and controlling an orientation of a nozzle, and a sensor for detecting a distance between a workpiece and the nozzle. The controller is capable of performing a profile control of correcting the position of the machine head based on the detected distance. When the machine head has reached a predetermined position part way through an approach process of moving the machine head from an approach start position to a machining start position while controlling the pose of the nozzle, the controller performs the profile control to move the machine head to the machining start position.

Abstract: Embodiments disclosed herein include a high-frequency emission module. In an embodiment, the high-frequency emission module comprises a solid state high-frequency power source, an applicator for propagating high-frequency electromagnetic radiation from the power source, and a thermal break coupled between the power source and the applicator. In an embodiment, the thermal break comprises a substrate, a trace on the substrate, and a ground plane.

Abstract: A liquid cooled electrode for a contact start plasma arc cutting torch is provided. The electrode includes an elongated body defining a longitudinal axis. The elongated body includes a proximal end shaped to matingly engage a torch body of the plasma arc cutting torch and a distal end located substantially opposite of the proximal end along the longitudinal axis. The electrode also includes one or more contact surfaces disposed on an external surface of the distal end of the electrode body between the proximal and distal ends. The one or more contact surfaces are shaped to physically contact a nozzle disposed within the plasma arc cutting torch during a portion of a pilot arc initiation process. The physical contact is configured to support transmission of a pilot arc current between the electrode and the nozzle with a density of at least about 3000 amps per square inch.

Abstract: A plasma source has an outer surface, interrupted by an aperture for delivering an atmospheric plasma from the outer surface. A transport mechanism transports a substrate in parallel with the outer surface, closely to the outer surface, so that gas from the atmospheric plasma may form a gas bearing between the outer surface the and the substrate. A first electrode of the plasma source has a first and second surface extending from an edge of the first electrode that runs along the aperture. The first surface defines the outer surface on a first side of the aperture. The distance between the first and second surface increasing with distance from the edge.

Abstract: Provided is an information processing apparatus, an information processing method, and a program capable of changing a presentation of a cooking situation in accordance with a user emotion. An information processing apparatus including an emotion detection unit that detects an emotion of a user and a control unit that performs control such that a heating situation during cooking is displayed and output. The control unit changes display of the heating situation in accordance with a user emotion detected by the emotion detection unit.

Abstract: Provided is a substrate supporting unit. The substrate supporting unit includes a susceptor supporting the substrate and having a pin hole vertically formed therein, a lift pin provided to move up and down along the pin hole, a support plate supporting the lift pin, and a driving unit vertically moving the support plate. The lift pin has a first magnetic substance formed at a lower end thereof. The support plate has a second magnetic substance provided thereon and having an opposite polarity to a polarity of the first magnetic substance.

Abstract: Apparatuses and methods for production of molybdenum targets, and the formed molybdenum targets, used to produce Tc-99m are described. The target includes a copper support plate having a front face and a back face. The copper support plate desirably has dimensions of thickness of about 2.8 mm, a length of about 65 mm and a width of about 30 mm; and the copper support plate desirably has either a circular or an elliptical cavity centrally formed therein by pressing molybdenum powder into the front face with a depth of about 200-400 microns. Also, the copper support plate includes cooling channels dispensed at the back face; wherein the copper support plate is water cooled by a flow of water during irradiation by a proton beam. Molybdenum powder is embedded and compressed onto the cavity of the copper support plate thereby creating a thin layer of molybdenum onto the copper support plate.

Abstract: The invention is related to a reactor (1) comprising at least one temperature unit (20) which provides high temperature, at least one waste inlet (11) from which the fuel and/or wastes are fed to the reactor (1), at least one reactant inlet (13 and/or 14 and/or 17), at least one melt outlet (15) which provides exiting of the melts formed by inorganic substances coming from the fuel and/or wastes via heat, at least one high temperature region (12) where endothermic reactions occur and a gas outlet (16) which provides that the fuel and/or wastes entering to the reactor (1) are directed to the high temperature region (12) such that the gasification does not start before they enter to this region (12) and therefore, where the gases leaving the reactor (1) as a result of the reaction exit from the reactor (1) by passing through the high temperature region (12) and which has a different openness from the waste inlet (11); having a high temperature region (12) positioned between the waste inlet (11) and gas outlet (

Abstract: A replacement part unit for a plasma torch includes an electrode, an insulation guide, and a nozzle. The insulation guide includes a hole into which the electrode is inserted. The insulation guide is coupled to the electrode by press-fitting or adhesion. The nozzle includes a hole into which the insulation guide is inserted. The nozzle is coupled to the insulation guide by press-fitting or adhesion.

Abstract: In some aspects, a plasma torch head for a plasma arc torch can include ports disposed within a base portion that are configured to receive fluids and electrical signals from a plasma torch lead via a plasma torch receptacle, the ports being shaped to align the torch head and the plasma torch receptacle during connection and including: a central coolant supply port to convey a liquid coolant to the torch head, the central coolant supply port extending a length to primarily align the plasma torch head with the torch receptacle, the central coolant supply port further including a flat surface shaped to secondarily align the torch head with the torch receptacle upon mating engagement, and an ohmic contact connector defining a tertiary alignment feature; and a connector disposed about the base portion shaped to engage with and couple to the torch receptacle.

Abstract: A plasma torch assembly (e.g., for an ICP-MS or ICP-AES instrument) with a retractable injector is disclosed. In implementations, the torch assembly includes an injector that can be extended or retracted relative to an auxiliary gas tube of the torch assembly. The injector can be slidably coupled to a torch body that supports the auxiliary gas tube, such that the injector can be moved forward and backward through a passage of the torch body, causing it to extend/retract relative to the auxiliary gas tube.

Abstract: An apparatus for depositing a coating on a substrate at atmospheric pressure comprises (a) a plasma torch comprising a microwave source coupled to an antenna disposed within a chamber having an open end, the chamber comprising a gas inlet for flow of a gas over the antenna to generate a plasma jet; (b) a substrate positioned outside the open end of the chamber a predetermined distance away from a tip of the antenna; and (c) a target material to be coated on the substrate disposed at the tip of the antenna.

Abstract: A dielectric barrier discharge ionization detector capable of achieving a high signal-to-noise ratio is provided. The detector includes: a discharging section for generating plasma from argon-containing gas by electric discharge; and a charge-collecting section for ionizing a component in a sample gas by an effect of the plasma and for detecting ion current formed by the ionized component. The discharging section includes a cylindrical dielectric tube having a high-voltage electrode connected to AC power source as well as upstream-side and downstream-side ground electrodes and formed on its outer circumferential wall. A semiconductor film is formed on the inner circumferential surface of the tube. The upstream-side and downstream-side ground electrodes are respectively made longer than the initiation distances for a creeping discharge between the high-voltage electrode and a tube-line tip member as well as between the high-voltage electrode and the charge-collecting section.

Abstract: A hand-held plasma power tool is provided, which includes a hand-held housing, a plasma delivery tip section at least partially disposed within the housing for delivering a plasma arc to a workpiece, an air compressor disposed within the housing for providing a gas to the plasma delivery tip section, and a power source disposed within the housing for providing a current to at least one of the air compressor or the plasma delivery tip section. The hand-held plasma power tool further comprises a handle section defined by at least a portion of the housing. The handle section is configured to enable an operator to manipulate the plasma power tool by hand while delivering the plasma arc to the workpiece.

Abstract: A replacement part unit for a plasma torch includes an electrode, an insulation guide, and a nozzle. The insulation guide includes a hole into which the electrode is inserted. The insulation guide is coupled to the electrode by press-fitting or adhesion. The nozzle includes a hole into which the insulation guide is inserted. The nozzle is coupled to the insulation guide by press-fitting or adhesion.

Abstract: A nozzle for a liquid-cooled plasma arc torch is provided. The nozzle includes a thermally conductive body having a distal end, a proximal end, and a longitudinal axis extending therethrough. The nozzle also includes a plasma arc exit orifice at the distal end of the thermally conductive body. The nozzle additionally includes a cooling waist located circumferentially about an exterior surface of the thermally conductive body. The cooling waist includes a liquid inlet slope, a liquid outlet slope and a heat exchange region between the liquid inlet slope and the liquid outlet slope. The heat exchange region extends substantially parallel to the longitudinal axis, and the liquid inlet slope and the liquid outlet slope are oriented generally perpendicular to the longitudinal axis.

Abstract: A plasma gas swirl ring for a liquid cooled plasma arc torch is provided. The swirl ring comprises a substantially hollow body having a distal end, a proximal end, an interior region defined by an interior surface, and an exterior surface. The interior region of the body is configured to receive an electrode of the plasma arc torch. The swirl ring comprises a first opening disposed within a portion of the proximal end of the body, a second opening disposed about a central portion of the body, and a third opening comprising at least one swirling port disposed within a portion of the distal end of the body. The third opening is configured to provide a swirling flow of the plasma gas about the electrode at the distal end of the body.

Abstract: Embodiments of the present invention are directed to an air cooled cutting torch having improved performance. The torch comprises an improved electrode, where the electrode has at least one gas flow port to allow air flow to pass through the electrode to improve cooling and performance.

Abstract: The plasma torch has a nozzle and body. The nozzle has an inner nozzle and inner cap fastened to the body with the inner nozzle. Annular water passage and a plurality of independent water passages are formed between the inner nozzle and inner cap. Force applied when the inner cap is fastened to the nozzle base is transmitted via partitions. The torch body has a water supply port and drain port. At least one of the water supply port and drain port is configured as a groove extending on a plane crossing the axis and is connected to the water passage. When the nozzle is fastened to the torch body, one of the independent water passages communicates with the water supply port and another communicates with the water drain port. Rear end surface of inner nozzle is in contact with end surface of the nozzle base thereby obtaining electrical conductivity.

Abstract: A plasma cutting apparatus includes a housing, a workpiece support, a movable plasma nozzle, and a nozzle drive arrangement. The housing includes a base, an upright pedestal extending upward from the base, and a stationary head cantilevered from the upright pedestal. The workpiece support extends from the upright pedestal and is located below the stationary head. The nozzle extends downward from an underside of the stationary head and is oriented for delivering a cutting plasma generally along one direction and toward a workpiece on the workpiece support. The nozzle drive arrangement is mounted to the stationary head and is connected for moving the plasma nozzle during a cutting operation.

Abstract: A coolant tube for a plasma arc torch is provided. The coolant tube includes an elongated coolant tube body including a distal portion configured to engage an electrode and a proximal portion configured to engage a body of the plasma arc torch. The coolant tube also includes a first electrically conductive element coupled to the distal portion of the elongated coolant tube body. The first electrically conductive element is configured to physically contact an electrode. The coolant tube further includes a second electrically conductive element coupled to the proximal portion of the elongated coolant tube body. The second electrically conductive element is configured to physically contact the body of the plasma arc torch. The elongated coolant tube body defines a current path and a fluid path between the body of the plasma arc torch and the electrode.

Abstract: A liquid-cooled consumable cartridge for a plasma arc torch is provided. The cartridge includes (i) an electrode, (ii) a swirl ring with a first outer retaining feature and a second outer retaining feature on an exterior surface, where the electrode is secured to the swirl ring, and (iii) a nozzle with an inner retaining feature on an interior surface, where the inner retaining feature of the nozzle is mated with the first outer retaining feature of the swirl ring. The cartridge also includes a cartridge frame with an inner retaining feature on an interior surface and an outer retaining feature on an exterior surface. The inner retaining feature of the cartridge frame is mated with the second outer retaining feature of the swirl ring. The cartridge further includes a shield with an inner retaining feature on an interior surface mated with the outer retaining feature of the cartridge frame.

Abstract: The invention relates to an electric arc cutting or welding torch comprising a torch body and torch head to be assembled to or disassembled from the torch body, the torch body comprising a peripheral wall and an axial housing, the axial housing comprising an orifice for receipt of at least part of the torch head, an actuator which is mobile in translation in the axial housing, at least one blocking element which is fitted so as to be mobile on the peripheral wall, the blocking element and the torch head each comprising reciprocal engagement means, the actuator being configured to maintain the blocking element spaced relative to the peripheral wall, the actuator also being configured to be displaced in the axial housing when the torch head is inserted in the orifice.

Abstract: An electrode for a plasma arc torch includes a generally cylindrical elongated body formed of an electrically conductive material. The elongated body includes a proximal end that connects to a power supply and a distal end that receives an emissive element. The electrode can include a flange that is disposed about a surface relative to the distal end of the elongated body, extends radially from the surface of the elongated body, and is utilized to establish a uniform gas flow distribution of a plasma gas flow about the distal end of the elongated body. The electrode can include a contact element that is in electrical communication with the proximal end of the electrode. The contact element includes seating portion that has an outer width that is greater than the outermost diameter of the electrode body and is configured to position the contact element within the plasma arc torch.

Abstract: The invention features an inner cap for a liquid-cooled plasma arc torch. The inner cap includes a body having a longitudinal axis, a first end, and a second end. The first end includes an annular portion disposed proximate a torch tip. A liquid passage is formed within the body, is shaped to convey a liquid therethrough, and has a first set of ports formed in the annular portion. A gas passage is formed within the body, is shaped to convey a gas therethrough, and includes a second set of ports formed in the annular portion. The annular portion is configured such that subsets of ports in the first set of ports direct the liquid in a radial direction with respect to the longitudinal axis and alternate, in a rotational direction about the longitudinal axis, with subsets of ports in the second set of ports.

Abstract: A metallic positive expulsion fuel tank with stress free weld seams may include a first hemispherical shell with a first edge; and a hemispherical rolling metal diaphragm with a first edge attached to the first hemispherical shell along matching first edges. A second hemispherical shell with a first edge may be attached to the first edge of the first hemispherical shell by a first weld seam thereby forming two interior chambers separated by the hemispherical rolling metal diaphragm. A pressurized gas inlet may be attached to the first hemispherical dome; and a fuel outlet fixture may be attached to the second hemispherical dome. The first weld seam may have been stress relieved by a localized post-weld heat treatment confined to an immediate vicinity of the first weld seam.

Abstract: A power transfer assembly for supplying electrical power to an electrode of a contact-start plasma arc torch has two conductive elements biased by a compression spring. The conductive elements are provided with mating structures that are defined by parallel surfaces that can be slidably engaged with each other. The conductive elements are configured to engage the spring such that positioning the mating structures to slidably engage each other generates an off-axis force in the spring that biases the mating structures together along at least one line of contact to assure an electrically conductive path through the mating structures from one conductive element to the other. One conductive element is a static element that is positioned against a power supplying element of the torch, while the other is a movable element that engages or is attached to the electrode.