Abstract: A converter for the refinement of liquid metal comprising a generally cylindrical body having closed ends and an opening in the circumference thereof, the body being arranged with its axis horizontal and being rotatable thereabout, a refractory arch with a heating unit movable into one part of the opening in the "normal" position of the body in which the opening is in an upper part thereof, a gas collection system aligned with the other part of the opening in the "normal" position of the body, and blast pipes extending into the body through a lower part of the body in the "normal" position thereof.

Abstract: A gunning apparatus for repairing a furnace lining is provided with a spray pipe of non-circular hollow cross-section. The spray pipe of non-circular cross section slidably moves back and forth within a rocking sleeve by a slide mechanism while the spray pipe is non-rotatable relative to the slide mechanism and is rotatable only by the rotation of the slide mechanism, whereby the shooting pipe is manipulated without weakening the rigidity or strength thereof which usually occurs on a conventional circular shooting pipe which requires keyways for rotation thereof.

Abstract: A clutch and damper assembly wherein a single plate clutch has torsion springs and deformable resilient members, permitting a wide angle of travel, disposed between the clutch input and output to accommodate engine torsional vibrations imposed on the clutch. The torsion springs permit a predetermined amount of relative angular movement between the clutch input and output at a predetermined rate, and the resilient members become operable after the predetermined motion to permit further relative motion at a higher rate. A friction assembly included within the damper dissipates the periodic energy of the torsional vibrations.

Abstract: A new crucible for use in the thermal analysis of metal alloys and especially aluminum alloys into which a thermocouple may be placed into a metallic thin-walled sheath which is secured in and extends upwardly from the crucible base and is connected to recording apparatus. The crucible is formed of an extremely thin-walled metallic cylindrical envelope having a base and a cake of heat-insulating material resting inside the envelope on the base, the thermocouple sheath extending upwardly through said cake.

Abstract: This disclosure proposes an improved method of and apparatus for collecting the fumes of a furnace but in particular of a steelmaking furnace using the basic oxygen blowing process which furnace rotates about a trunnion arrangement. Especially this disclosure applies to an improved fume collecting method for an oxygen steelmaking furnace whose emissions take place during the charging of scrap, during the charging of molten iron, during blowing oxygen in the furnace, and during the sample and temperature taking. This fume collection is accomplished by providing a hood of multiple purpose design adapted to collect the emissions during any of the aforementioned portions of the steelmaking cycle, which can be retro-fitted to existing steelmaking facilities.

Abstract: An improved apparatus for controlled application of granular refractory material to the linings of ladles, furnaces, and other open top vessels employed in the handling of molten metals. The apparatus comprises a generally vertically arranged pair of telescopically related conduits, there being a nozzle on the lower end of the innermost conduit. Granular material is supplied to the upper end of the innermost conduit and water is supplied through a member to the upper end of the outer conduit and from the lower end of the outer conduit to the nozzle. Means is provided for rotating the conduits and hence the nozzle. Other means is provided for raising and lowering the nozzle and the entire apparatus may be suspended from a crane or the like over the vessel whose lining is to be coated, repaired, filled, etc.

Abstract: A method of manufacturing a solid electrolyte capacitor, an anode terminal of which is directly attached to a portion of an anode body of porous valve-metal characteristically includes the steps of selectively exposing a predetermined portion of the anode body, and providing the anode terminal to the predetermined portion of the anode body, where the porous valve metal and oxide thereof co-exist, by using conductive material other than the valve-metal of the anode body.

Abstract: In the quenching of sheet metal, the sheet metal is passed through a stream of quenching fluid in the form of an aerosol and which is caused to flow in a direction perpendicular to the direction of passage of the metal sheet and parallel to the general plane of the metal sheet.

Abstract: A socket has a pair of spaced elongated side walls which extend lengthwise along a predetermined direction, and an upper and a lower wall located at respective opposite end regions of the side walls. The socket also includes a connecting wall extending intermediate the side walls and connecting the latter. The connecting wall is formed with a pair of passages which are spaced along the predetermined direction relative to each other by a predetermined distance. These passages are operative for receiving electrical pins connected to electrical motor wires and for mounting such wires at said predetermined distance relative to each other. The socket is insertable into a cutout of the housing and is connected to the latter by a resiliently yieldable element which is mounted on the upper wall of the socket. The socket also comprises a guide member on one of the side walls and a fixing member on the lower wall for respectively guiding and fixing the socket upon its insertion into the cutout of the housing.

Abstract: A medium-conduit-system for use in a tiltable-metallurgical-vessel-arrangement of the type including a carrying ring for the vessel, tilting trunnions on the carrying ring and base-supported bearings for the tilting trunnions, wherein at least one of the tilting trunnions is hollow, has a first pipe in the hollow trunnion and a second pipe extending through the carrying ring changing the direction and connected by a flange connection with screws to the first pipe, the screws having extensions projecting to the outside of the vessel-arrangement, and a supply system is connected to the second pipe.

Abstract: The stack gas from a shaft furnace in which iron ore is directly reduced is cooled and filtered and then subjected to steam so as to convert its carbon monoxide into carbon dioxide and water. The carbon dioxide and water are then scrubbed out of this stack gas so as to leave virtually pure hydrogen which is heated to a temperature between 400.degree. and 600.degree. C and added to the output of an oxygen reactor that transforms coal and oxygen into a synthetic gas having a carbon-monoxide/hydrogen volume ratio of at least 1.5:1. The addition of this hydrogen to the output of the reactor lowers the volume ratio to 1:1 at most so that this mixture can be reintroduced into the shaft furnace at a temperature of around 1000.degree. C as a reducing gas.

Abstract: A blast furnace taphole drilling apparatus is mounted so as to be movable, between the taphole drilling and retracted positions, in an inclined plane. The mounting means for the drilling apparatus permits the vertical and/or angular adjustment of the drill bit and the drill is held in the operative position solely under the influence of hydraulic pressure. Motive fluid for the drill of the taphole drilling apparatus is delivered to the drill, which is mounted for movement along a support beam, either by a rigid conduit system or via flexible conduits which are played out from and rewound on a reel.

Abstract: A lance in a converter is supported at a first part thereof on a gimbal mechanism supported on a bridge supported on rotation devices supported on a lance carriage above the converter and operating to drive the bridge and the first part of the lance to undergo a revolutionary motion, and is held at a second part thereof below the first part against horizontal movement by another bearing device, whereby the lance is driven in gyratory motion about the center of the second part as a central node, the radius and speed of gyration of the working end of the lance being adjustable. Pertinent parts of the lance carriage, which can be raised and lowered in guided vertical movement by a hoisting device, are provided with cutout recesses into which the lance in vertical state at the time of installation can be placed by being moved sidewise in horizontal movement, whereby the installation and removal of the lance is greatly facilitated.

Abstract: A Schottky barrier diode having a subsurface metalsemiconductor rectifying barrier with electrical rectification properties immune to semiconductor surface contamination. A special ion implantation technique is used to produce a very thin but strongly metallic island-like region in a semiconductive body. A Schottky barrier separates the region from the semiconductive body below the semiconductor body surface. A special truncated Gaussian profile in metal concentration through the thickness of the region provides low thermal and electrical resistance between the Schottky barrier and the region surface.

Abstract: A refractory sleeve terminating in a refractory head surrounds an injection pipe for injection of a desulphurizing agent under gas pressure into cast iron or steel and forms with the injection pipe a cooling chamber closed at its lower and lateral parts. A plurality of cooling air inflow pipes extend from a distributor case overlying the refractory sleeve through the cooling chamber in a circumferential array parallel to the injection pipe with the ends of the pipe facing the closed bottom of the chamber open to effect discharge of very cool air in the vicinity of the refractory head with the cooling air escaping upwardly within the chamber about the inflow pipes to cool the injection pipe and the refractory sleeve prior to escaping from the sleeve at the top.

Abstract: A forehearth of a smelting furnace which includes a weir used in conjunction with a float essentially in the form of a U disposed in a horizontal position, with the opening of the U disposed adjacent to the discharge opening of the weir, the float having a thickness sufficient to act to dam or stop passage of molten material from the forehearth through the weir, but allowing such molten material to pass under the float, and through the opening of the U, and thence through the discharge weir.

Abstract: A method for producing steels within a very close analysis tolerance in which the raw materials are melted down in a first vessel, the melt is then tapped into a second vessel in which deslagging is accomplished, and thereafter the melt is subjected to treatment under a vacuum. An apparatus for carrying out the method is also described.

Abstract: A method for adjusting the leakage current of insulated gate field effect transistors comprised of silicon mesas epitaxially formed on a sapphire substrate, wherein the leakage current of a P channel transistor is increased by preoxidizing the silicon prior to standard processing and/or wherein the leakage current is decreased by annealing the silicon in a reducing atmosphere in addition to standard processing steps. The leakage current of an N channel transistor is reduced by preoxidizing the silicon of the transistor prior to forming the transistor and/or is increased by annealing in a reducing atmosphere in addition to the steps necessary for forming the transistor.

Abstract: Cooling by a gas coolant of carbon steel wire coils which have been heated to above the austenizing temperature of the wire is controlled to rapidly quench cool the wire coils to within a selected critical range of temperatures which results in a desired fine pearlitic crystalline structure of the steel wire, by controlling the impingement pattern and velocity of the coolant gas on the wire. The coolant gas is discharged through individual coolant gas inlet conduits, thence through a plurality of individual enclosed plenum boxes, onto the heated coils as the coils are transported past the boxes by a conveyor device. Each plenum box has a series of gas-discharge slots formed in the bottom thereof, through which slots the gas is discharged onto the coils. The distance between the discharge slots of each box and the wire coils may be selectively adjusted by raising or lowering individual ones of the plenum boxes relative to the level of the wire coils on the conveyor device.

Abstract: In the process for producing solid electrolyte capacitors, wherein a plurality of porous valve-metal anodes are attached by their anode lead wires to a metal carrier bar during the steps of forming the dielectric film, depositing the solid electrolyte and applying a conductive counterelectrode thereover; the capacitors may be substantially finished by further batch process steps prior to severing the anode wires and removing them from the carrier bar. An insulative resin coating is applied over each counterelectroded body and metal loaded end caps are formed over the anode end and the cathode end respectively of each body to provide terminations by which the capacitor may be flush mounted to a printed circuit board.