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| Number | Title | Issue Date |
| 4284658 | Regenerator seal A method for manufacturing a hot side regenerator cross arm seal assembly having a thermally stablilized wear coating with a substantially flat wear surface thereon to seal between low pressure and high pressure passages to and from the hot inboard side o... | 08/18/1981 |
| 4284879 | Methods of containing fluids deleterious to the container Fluid permeable wall members through which an auxiliary fluid is passed against pressure exerted by a fluid to be contained, which wall member is composed of inorganic fibres, may be used to contain hot fluids or fluids otherwise having a deleterious effe... | 08/18/1981 |
| 4266113 | Dismountable inductively-coupled plasma torch apparatus Precise concentric alignment of the coolant, plasma and sample gas tubes d in conventional ICPs is an operationally important factor often achieved by fused arrangements which effectively preclude dismountability for maintenance and repair. Spacer rings ... | 05/05/1981 |
| 4265930 | Process for producing oxygen sensing element A protective layer of a refractory material deposited on a metal electrode layer of an oxygen sensing element is improved by a process comprising forming the protective layer onto the surface of the metal electrode layer by plasma spray coating the surfac... | 05/05/1981 |
| 4256779 | Plasma spray method and apparatus A plasma spray method capable of directing plasticized powders against a substrate for deposition of a protective coating thereon is disclosed. Various structural details of the apparatus described enable the attainment of high particle velocities without... | 03/17/1981 |
| 4250373 | Transferred type plasma torch A transferred type plasma torch comprises a body containing and rigidly interconnecting; a bushing having an internal constricted surface, a collet attachment mounted in the bushing, an electrode mounted in the collet attachment, a nozzle tip disposed coa... | 02/10/1981 |
| 4243865 | Process for treating material in plasma environment An improved method of fabricating metal-semiconductor interfaces such as Schottky barriers and ohmic contacts. There is disclosed apparatus and method (or process) for chemically converting, etching, or passivating the surface of a material, such as the s... | 01/06/1981 |
| 4242562 | Plasma arc torch head In the body of a plasma arc torch head coolant inlet ducts extend normally to the portions of the nozzle surface subject to maximum heating. The rate of cooling and a permissible power of the plasma arc torch are markedly increased by directing the flow o... | 12/30/1980 |
| 4238663 | Tube bundle cutting method and apparatus One or more pairs of vertically-spaced-apart sidewardly-aimable plasma arc cutting torches, the upper one angled upward and the bottom one downward, on the end of a horizontal boom movable longitudinally fore and aft and angularly sideward, are used to do... | 12/09/1980 |
| 4236059 | Thermal spray apparatus Thermal spray apparatus capable of directing plasticized powders against a substrate for deposition of a protective coating thereon is disclosed. Various structural details of the apparatus of the present invention enable the attainment of high particle v... | 11/25/1980 |
| 4234778 | Method of and welding torch for arc welding Plasma-MIG welding in which a thermally ionizable gas stream is flowed through a nozzle non-consumable electrode having a central orifice and a surrounding annular opening toward a workpiece and is thereby split into a central gas column enveloped by an a... | 11/18/1980 |
| 4234779 | Method of and device for plasma-MIG welding Plasma-MIG welding in which a thermally ionizable inert gas stream is flowed through a nozzle non-consumable electrode having a central aperture and a surrounding annular aperture toward a workpiece and is thereby split into a central gas column enveloped... | 11/18/1980 |
| 4233489 | Method of and device for plasma MIG-welding Plasma-MIG welding wherein a plasma arc is initially established between a non-consumable electrode and a workpiece to initate and sustain a non-deviated plasma flow therebetween, welding wire is supplied along a path generally parallel to but laterally d... | 11/11/1980 |
| 4233490 | Method of reinforcing aluminium alloy piston ring groove Disclosed is a method of reinforcing an aluminium alloy piston ring groove wherein the piston body is fused to a certain depth around the periphery thereof in the zone where the ring groove is to be cut, with simultaneous introduction of an alloying addit... | 11/11/1980 |
| 4227065 | Method of joining current conducting components of wave guide elements and producing of the same A wave guide is formed from a plurality of internally coated plates whose internal coating forms the current-conducting surfaces of the wave guide. The plates are welded together, their corners being welding beams trained through one of the plates at a lo... | 10/07/1980 |
| 4225785 | Process for the production of a sensitive plate for an exoelectron dosimeter Process for the production of a sensitive plate for an exoelectron dosimeter by producing on a support a deposit of a mixture of two compositions constituted on the one hand by a substance having traps for the electrons and able to emit exoelectrons by th... | 09/30/1980 |
| 4225769 | Plasma torch starting circuit A plasma torch system is provided which creates a pilot arc having high instantaneous power and low average power. The pilot arc ignition circuit reduces the pilot arc duty cycle by pulsing on the pilot arc and then extinguishing it. A plasma torch disclo... | 09/30/1980 |
| 4220843 | Process for melting material A high temperature reactor is fitted with a plasma gun at an anode chamber and is provided with a graphite cathode. The reactor is cooled by means of pipes in the refractory lining of the reactor, and rests on essentially horizontal bearings. The charge t... | 09/02/1980 |
| 4220844 | Method of and device for plasma MIG welding A plasma-MIG welding system includes establishing a plasma arc between a primary non-consumable electrode and an auxiliary non-consumable nozzle electrode to provide a plasma flow downstream of the primary non-consumable electrode and out through such noz... | 09/02/1980 |
| 4217479 | High temperature reactor A high temperature reactor is fitted with a plasma gun at an anode chamber and is provided with a graphite cathode. The reactor is cooled by means of pipes in the refractory lining of the reactor, and rests on essentially horizontal bearings. The charge t... | 08/12/1980 |
| 4213027 | Method of treating electrodes intended for operation in argon as cathodes of an electric arc A method of treating electrodes intended for operation in argon as electric arc cathodes. Each of the electrodes being treated consists of a holder with an active insert. The active insert comprises elements selected from the series of rare-earth elements... | 07/15/1980 |
| 4207137 | Method of controlling a plasma etching process by monitoring the impedance changes of the RF power A plasma etching process wherein the end point of the reaction can be accurately determined for fine line definition. This is accomplished by monitoring the impedance of the plasma during the reaction. The reaction is stopped at, or a predetermined time a... | 06/10/1980 |
| 4205215 | Method and device for welding in a thermally ionized gas A plasma-MIG welding system in which the power for establishing the MIG-arc is supplied to the consumable electrode at a point downstream of the non-consumable electrode.... | 05/27/1980 |
| 4179599 | Laser plasmatron Plasma generation occurs when radiation from a high power, infrared laser is directed to a sufficiently short focal point to produce the irradiance required for producing a plasma or laser-supported combustion wave, with the assistance of external plasma ... | 12/18/1979 |
| 4170727 | Thermal torch height acquisition circuit A plasma torch circuit includes a control for initially setting the torch at a desired height above a workpiece during the time the non-transferred arc exists between the torch cathode and the torch tip. Measurement is made of the voltage between the cath... | 10/09/1979 |
| 4166761 | Fusion chamber A fusion chamber is provided with an inner energy envelope by a hollow laser beam which travels the length of the chamber. A light energy dispersion element disposed at the far end of the chamber reflects the light energy of the laser beam to the inner re... | 09/04/1979 |
| 4162431 | Method and apparatus for controlling the erosion of arc producing electrodes Apparatus and process for reducing the rate of erosion of electrodes between which an arc is sustained by the provision of a field coil around the electrode which is supplied with direct current and the oscillation of that direct current supply at a frequ... | 07/24/1979 |
| 4153831 | Plasma arc welder for titanium blade spars A tube welding mill is shown through which titanium tube preforms are drawn and closed under a relatively stationary plasma arc welding torch. The tube preforms are drawn through a series of closing capstans, over a knife-edge guide bar and eventually und... | 05/08/1979 |
| 4152571 | Brazing method In a brazing method of brazing a joint at the contacted surfaces of two base metals, the surfaces of the base metals are arc heated to the optimum brazing temperature of higher than a melting point of a brazing alloy and lower than a melting point of the ... | 05/01/1979 |
| 4151034 | Continuous gas plasma etching apparatus A continuous gas plasma etching apparatus comprising a reaction chamber having an inlet means and an outlet means, an activation portion disposed at a distance from said reaction chamber, a distributor means for uniformly supplying said reaction chamber w... | 04/24/1979 |
| 4147957 | Plasma jet device and method of operating same A plasma jet device which comprises first and second anode electrodes spaced apart and positioned such that their axes, if extended, would intersect at an angle, and a third cathode electrode positioned offset from the plane formed by the extended axes of... | 04/03/1979 |
| 4145403 | Arc heater method for producing metal oxides An arc heater method and system for producing a high energy source characterized by a housing forming a mixing compartment, a plurality of arc heaters radially mounted on the housing and communicating with the mixing compartment, a reactor communicating w... | 03/20/1979 |
| 4144444 | Method of heating gas and electric arc plasmochemical reactor realizing same A method of heating a gas, particularly a chemically reactant ionized gas, designed, in particular, for producing lower olefins and industrial hydrogen from hydrocarbon stock, wherein the gas is mixed with an intermediate heat carrier gas plasma jet and h... | 03/13/1979 |
| 4143260 | Multi electrode torch A multi-electrode welding apparatus is provided which includes a torch body and a least two electrodes, preferably of the non-consumable type, which are adjustably mounted in the torch body so as to be vertically positionable with respect to a workpiece a... | 03/06/1979 |
| 4141694 | Apparatus for the gasification of carbonaceous matter by plasma arc pyrolysis An apparatus for gasification of carbonaceous matter by plasma arc pyrolysis is disclosed. In one embodiment, a refractory-lined furnace is provided with a depression along its base for holding a pool of molten metal which acts as the external electrode f... | 02/27/1979 |
| 4142090 | Method of and device for plasma MIG welding Plasma MIG welding in which a plasma flow is generated between a non-consumable electrode and a workpiece, and a consumable electrode is fed through such plasma flow toward the workpiece to establish a MIG arc between the same. The current intensity in th... | 02/27/1979 |
| 4139757 | Method and device for igniting gas planing This invention relates to a method and a device for igniting a gas planing process. The method is based on applying heat to a workpiece by means of a movable heat source, which in principle has a point effect so that the heated or molten portion of the wo... | 02/13/1979 |
| 4136273 | Method and apparatus for TIG welding A method for TIG welding by using a plurality of nonconsumable electrodes extending frm the tip of a TIG welding torch and one filler wire fed through a space between the electrodes, each electrode being independently supplied with power. A molten pool is... | 01/23/1979 |
| 4133988 | Method of plasma arc cutting control and a device for realizing same To control the plasma arc in accordance with the present invention, the pressure change characteristics or curve in a torch is determined from the moment a plasma forming gas is delivered thereto until this plasma forming gas reaches the pressure in the s... | 01/09/1979 |
| 4133987 | Electrode assembly for plasma arc torches In a plasma-arc torch for melting metals the electrode assembly comprises an electrode holder made of copper alloys and having a butt portion which rigidly secures a tungsten electrode by means of diffusion welding. The invention provides for a welded joi... | 01/09/1979 |
