Abstract: Apparatus and method of circulating a gas through coils of very long tubing during a heat treatment, wherein the coils of tubing are placed on hollow frames through which the clearing gas passes. The frames are fitted with nozzles to which at least one end of each coil can be connected. The invention can be applied to continuous annealing of coils of small-diameter copper tubing with a view to removing the last traces of drawing lubricant.

Abstract: An apparatus for removing and replacing blast furnace tuyeres. The apparatus is indexed with the centerline of the tuyere and downcomer from the bustle pipe to permit removal and replacement of the blowpipe-elbow, tuyere and tuyere cooler.

Abstract: Disclosed is a manipulator which is particularly suitable for tapping a furnace. The manipulator includes an elongate arm which is axially reciprocable and rotatable in a vertical and a horizontal plane, and a handle for operating the arm for its axial reciprocal movement and vertical or horizontal rotation. The manipulator is particularly characterized by the provision of a bilateral servo system interconnecting between the arm and the handle for feeding back to the handle any variation in the force acting on the arm under operation.

Abstract: A plant for refining molten pig iron has a converter surrounded by a carrying ring which is tiltable about a horizontal axis by oppositely arranged carrying trunnions and at least one water-cooled hook-shaped blowing lance which looks like an inverted U. The lance is liftably and lowerably arranged on a vertically stationary, but horizontally rotatable, vertical lance guide located at a position lateral of the converter and outside its tilting area. At least one lance car guides the water-cooled lance on the vertically stationary lance guide.

Abstract: A device for exchanging the down spout and repairing a seating brick in a steel ladle, comprising a vertically movable cage, a hoist system therefore and a carriage for transferring the ladle along a fixed track. The carriage is adapted to hold the ladle with the radial direction of the bottom of the ladle towards the down spout at an acute angle to the direction of transfer. Above the path of the upper rim of the ladle, a platform is provided, and further a tower construction is displaceable on the platform in the radial direction towards the down spout. The cage is hoistable inside the tower construction by means of hoisting means connected to the tower construction. In a preferred embodiment the cage consists of a substantially cylindrical insulated wall and of a bottom cooled by flushing with air. A ventilation system, a travelling crab, an operating hatch in the cage wall and a special recessed shape of the cage may facilitate operation.

Abstract: A metal melt is filtered by causing the melt to flow successively into a filter chamber, downwards through the filter chamber, into a riser chamber, upwards through the riser chamber, and out of the riser chamber, and simultaneously introducing a counter-current flow of gas into the filter chamber, while the filter chamber contains a loose bed of granulate, whereas in the riser chamber there is no granulate nor is gas introduced therein.

Abstract: Means are disclosed which allow one to quickly modify the circumferential dimension or shape of the container that can be formed by an apparatus which forms a tubular container by first clamping a flat blank of sheet material against a basic mandrel with a clamping means and then folding the thus clamped blank around the mandrel sleeve. Also disclosed is an apparatus including that means, which apparatus can be easily modified to form tubular containers of various circumferential dimensions or shapes from flat blanks of sheet material.

Abstract: An open topped, refractory lined metallurgical converter vessel has a metallic shell. A cooling jacket is affixed to the frusto-conical nose portion of the shell and comprises a plurality of right angle members affixed to the shell in a side-by-side relation and extending generally in the axial direction. The members have their edges affixed to the shell surface to form a flow passage therewith. A manifold pipe extends partially around the vessel and is connected to all of the flow passages except for those above and adjacent to the tap nozzle which are connected to a drain manifold. Plate sections are affixed to the upper end of the angle members and to the shell to define a nose cooling ring which is connected to the upper end of each angle section to define a return flow path for cooling water. Baffles are disposed in the nose cooling ring adjacent the margins of the angle members which are connected to the drain manifold to insure filling of the system.

Abstract: A method of making an MOS-type semiconductor device wherein the surface thereon for the conductors is flat. For this purpose, a polycrystalline silicon layer is provided and a part of the layer is selectively oxidized, so that the remaining portion of the layer acts as a lead for connecting a functional region such as a source region, a drain region etc. with the conductor layer. When said oxidization is performed, the diffusion from the polycrystalline silicon layer into the substrate occurs due to heating, so that said functional regions are formed at the same time.

Abstract: A process for preparing a complementary MOS integrated circuit by forming a shallow first source-drain region near the gate; determining simultaneously the contact holes in the source-drain regions of both of the P-channel and N-channel transistors; forming a deep second source-drain region from the contact holes using thermal diffusion; and forming the electrodes at the contact holes.

Abstract: A thermally stable lance for injecting particulate material into molten metal is provided which comprises an elongated thermal insulating member having spaced apart first and second ends and at least one wall therebetween defining the member; a reinforcing rod axially disposed in the insulating member with one end of the rod extending beyond the first end of the insulating member, the rod having a plurality of outwardly extending protrusions in contact with the said insulating member; a length of wire wound around the reinforcing rod which is in contact with the insulating member; and a hollow injection tube having spaced apart first and second ends axially disposed in the insulating member with the first end thereof extending beyond the first end of the insulating member and the second end extending beyond the second end of the insulating member.

Abstract: A device for controlling the rotor in a paper stock refiner to locate the rotor in a neutral position in the stator during start-up and shut-down, at which time uneven stock flow and unequal hydraulic pressures may occur tending to move the rotor off floating center so that its refiner surfaces shift toward and possibly into damaging engagement with the stator refiner surfaces. During full operation the rotor shaft is released for normal self-centering or adjustment relative to the stator.

Abstract: A steel making oxygen lance assembly includes a top support member having oxygen, water inlet and outlet pipes connected to a supply source and discharge source. A connecter assembly includes first upper and second lower annular members with aligned slots which are secured together by a quick disconnect arrangement. The lower connecter includes a ring which has pipes connected thereto providing communication with the pipes on the top support member. One of the connecter members also has a replaceable sleeve connected thereto which also includes openings in registry with the slots. A vent arrangement provides for positive venting of any leakage. O-rings are provided to prevent leakage between the pipes and contacting surfaces.

Abstract: A gas and oxygen lance includes a top support member with first and second connector assemblies connected together with a quick release arrangement. The connector assemblies both include plates with aligned openings which transmit oxygen, gas, and water from the top support to the nozzle by means of oxygen, gas, and water pipes. The lance includes a sleeve assembly connected to one of the connector assemblies which is readily replaceable and which are connected in relative sealing and sliding relation to the oxygen and gas pipes. O-ring seals are provided to prevent leakage and a venting system safeguards the assembly in the event of leakage.

Abstract: A method of manufacturing an electronic device, comprising a plurality of closely spaced conductive layers on a substrate, said method comprising the steps of depositing said substrate a layer of polycrystalline semiconductor material, providing at least one aperture defined in and extending through said polycrystalline layer, effecting a material treatment via an exposed edge of said polycrystalline layer in said aperture in the presence of a masking layer on said polycrystalline layer, said treatment being effected to convert a narrow strip portion of the polycrystalline layer of substantially uniform width and underlying the masking layer adjacent the aperture into material insoluble in an etchant specific for the untreated part of said polycrystalline layer, removing said masking layer and selectively removing, with the use of said etchant, the untreated polycrystalline semiconductor material to leave a narrow strip of material present on and raised above the substrate, and effecting a deposition of condu

Abstract: A pressure vessel base closure means including a pair of flat disc-like members spaced apart by a peripheral outer cylindrical member and an inner perforated cylindrical member, and there being provided between the two flat disc-like members a plurality of radially directed ribs to provide rigidity to the base closure means. The base closure means is particularly useful for a reactor in which a bed of fluidized solid is maintained by the passage of a gas into the reactor through the base via the chamber between the two flat disc-like members.

Abstract: An oxygen lance assembly includes a top connector member having oxygen and water inlet and outlet pipes communicating with the slotted openings of a first connector plate assembly. A second connector plate assembly includes complementary slots in a flat plate which is quickly connected and released by means of a quick disconnect arrangement. The second connector assembly includes oxygen, water inlet and outlet pipes communicating with the slots. O-ring seals are positioned to prevent leakage of oxygen into the water pipes, or the leakage of water into the oxygen pipe. Any leakage which might occur is efficiently vented to the atmosphere.

Abstract: An oxygen lance includes a top connector and support member which is provided with oxygen and water inlet and outlet pipes connected to an upper connector plate assembly having a flat plate surface with a plurality of openings. A lower connector assembly is connected to the upper connector assembly by quick disconnect clamping means. The lower connector assembly includes openings registering with the upper openings and communicating oxygen and water inlet and outlet pipes. The lower connector assembly is provided to communicate with a vent passage provided at the lower end of the lance by means of a vent pipe which envelop the lower oxygen pipe and communicates with the atmosphere.

Abstract: A steelmaking oxygen lance assembly includes a top support member having oxygen and water inlet and outlet pipes. The support member includes a connector plate assembly provided with slots communicating with the pipes. A second connector plate assembly with similar slots is clamped to the first connector plate by quick releasable securing members with the slots in registry. The support head includes an upper oxygen pipe that projects downwardly into a sleeve supported on the second connector plate assembly to provide a slip joint.A lower oxygen pipe on the second connector plate assembly includes an upper enlarged tubular portion in sliding engagement with the sleeve with a lower enlarged portion of the upper oxygen pipe. The arrangement includes a vent chamber in the slip joint and positive venting through the second connector plate assembly.

Abstract: A steelmaking oxygen lance assembly includes a top support member having oxygen and water inlet and outlet pipes. The support member includes a connector plate assembly provided with slots communicating with the pipes. A second connector plate assembly with similar slots is clamped to the first connector plate by quick releasable securing members with the slots in registry. The support head includes an upper oxygen pipe that projects downwardly into a sleeve supported on the second connector plate assembly to provide a slip joint.A lower oxygen pipe on the second connector plate assembly includes an upper enlarged tubular portion in sliding engagement with the sleeve with a lower enlarged portion of the upper oxygen pipe. The arrangement includes a vent chamber in the slip joint and positive venting through the second connector plate assembly.