Abstract: A comminuter for metal turnings and the like has a rotor rotatable on a support about a fixed axis and carrying at least one outer rotor element and at least one inner rotor element which define a cylindrical orbit on rotation of the rotor. A housing surrounds this rotor and is formed by a U-shaped upwardly open portion of non-tapering cross-sectional shape and a flat cover part engageable over the open upper side and openable in order to clear a jam in the machine. Stator elements carried on this housing are spaced slightly from the rotor element so that as the rotor turns turnings and the like fed to the machine will be comminuted and passed from an inlet to an outlet end.

Abstract: The disclosure relates to a manipulator for an immersion lance for the injection of finely-divided additive material into a melt. The manipulator is provided with a pivotal lance frame on which a lance is supported such that it may be raised and lowered. The lance frame cooperates with a lance magazine for the replacement of a lance, the lance magazine having a plurality of pipes each for accommodating one lance.

Abstract: A transfer cylinder is rotatably mounted in a machine frame and is positioned in spaced parallel relation with a rotatable delivery cylinder. A side fold cylinder is positioned intermediate the transfer and delivery cylinders. The transfer cylinder conveys the envelope blank onto the periphery of the side fold cylinder. Rotation of the side fold cylinder with the envelope blank retained thereon folds the side flap and advances the folded envelope into engagement with the delivery cylinder. A gumming cylinder having an adhesive applicator portion is positioned adjacent the delivery cylinder and is operable to apply a strip of adhesive to the exposed bottom flap of the envelope blank as the blank is transferred from the delivery cylinder to the gumming cylinder. A selected amount of the adhesive is transferred from a reservoir by a roller to the surface of the adhesive applicator. The gumming cylinder rotates in timed relation to the delivery cylinder and in an opposite direction.

Abstract: Metallic magnesium is prepared by reducing magnesium oxide with carbon and condensing metallic magnesium by ejecting a coolant gas from a nozzle having small hole to an outlet opening for discharging the mixed gas of the coolant gas, carbon monoxide and metallic magnesium, which is disposed at the corresponding position to the nozzle.

Abstract: A vessel, particularly a ladle, and method for mixing molten metal. The vessel is adapted to be used in an upright position and has bottom openings, including at least one first opening for the introduction of gas under pressure to stir the contents, and a second opening for discharging contents. A porous plug prevents metal from flowing through each first opening and a stopper controls discharge of metal through the second opening. The inside bottom surface of the vessel is sloped downwardly toward the first opening or openings and the entrance to the second opening is at a level above all first openings when the vessel is upright. The porous plug or plugs may be recessed with respect to the inside bottom surface. Any material that settles from the molten metal will tend to collect directly above a porous plug and become entrained in the stirred metal upon the introduction of gas.

Abstract: In a method for the manufacture of a semiconductor device, comprising selectively forming at least one function region of a semiconductor element by a photoengraving technique using a masking layer and forming an electrode metal layer on an electrode contact surface portion of said substrate adjacent to the function region, the position of the electrode contact portion is determined by subjecting the masking layer on the surface of the substrate to an initial patterning step. This method can be advantageously used to attain high integration of an IC device.

Abstract: Shaft furnace having a shell, a refractory lining along at least part of its inner surface of a material which contains at least 50% free carbon, and which furthermore is provided with a water-cooled tuyere which is in contact with the refractory lining, including at least one extra layer of a material provided below the cooled tuyere in the refractory lining, over at least part of its thickness and substantially transversely to the direction towards the cooled tuyere which at the temperature of this layer during operation cannot locally react chemically with water and/or with the reaction products of water and carbon and a closed circular gutter which is connected to one or more de-watering openings through the shell, at least one of the extra layers at the side of the furnace shell being connected to said gutter.

Abstract: The invention relates to a plug of the kind comprising a first element having at least one pin, and a second element having at least one socket designed to take the pin. The improvement is that the pin is cylindrical in shape and has an enlarged end, ogival in shape, and the socket has a square-section hole, the diameter of the circle inscribed in the hole being substantially equal to the maximum diameter of the swollen end of the pin.

Abstract: A metallurgical vessel, particularly for use as a converter, includes a receptacle tiltably mounted on supporting journals fitted into bushings. Media for treating the contents of the receptacle and/or for cooling the outside walls of the receptacle is fed to the receptacle by feed and delivery pipes connected at one end to a distributor and at the other end to at least one of the bushings. A plurality of bores axially extending through the bushing and connected to the delivery pipes is provided as means for communicating the media to the receptacle. The bores extend parallel to the axis of the supporting journal and are disposed in a circumferential arrangement around and coaxial with the axis of the supporting journals.

Abstract: An end plug for a coaxial cable in which the center conductor contact comprises an extension of the dielectric spacer of the plug with the center conductor of the cable being positioned around the spacer extension in grooves formed therein. The depth of the grooves is less than the center conductor diameter so that the center conductor extends out the grooves and will make electrical contact with a mating connector.

Abstract: A crucible, tundish, and pouring spout is formed as a single unit with the crucible portion being positioned in an induction furnace for providing sufficient heat to ingots placed in the crucible portion. An extension is positioned on top of the crucible portion on one side forming an integral tundish portion with one part of the crucible for the molten metal. After the induction coil had melted the ingot and the induction heater and crucible portion are tilted approximately 90.degree., the molten metal is held by the tundish portion. A pouring spout portion extends from the extension referred to for pouring the molten metal from the tundish portion. Said pouring spout portion includes a nozzle insert and intermediate insert for providing the proper restricted opening and to protect the inner sides of the spout portion.

Abstract: A hot metal mixer has an elongate hollow vessel mounted for rotation about a longitudinal axis adjacent each end on a cradle, each of which is supported on pairs of parallel trucks disposed on separate sets of rails. Each cradle extends transversely between the trucks of each pair and is coupled to one truck by a spherical bearing and to the other by spherical and roller bearings to permit thermal expansion and contraction, slight track misalignment and travel around curves. A pair of spouts for receiving or pouring metal are disposed in the upper side portion of the vessel and in spaced relation from the top center.

Abstract: Apparatus for heat treatment of metal pieces such as billets, ingots, bars and the like, by pre-heating using direct flame impingement in a pre-heating furnace and then transferance into a holding furnace using forced hot air circulation where the metal pieces are held for the time required at the desired heat treatment temperature.

Abstract: The servicing of clay guns used in plugging the pouring holes of blast furnaces is facilitated by providing for the access to the sealant receiving cylinders of such clay guns through the front end thereof and without disassembling the clay gun from their actuators. Ease of access results from providing a cylinder front end extension which may easily be removed from axial alignment with the cylinder and which receives and accommodates at least that portion of the clay gun ejector piston which bears sealing rings when the piston has been extended to its limit of travel.

Abstract: A method is provided for the continuous purification of an impure metal in a column consisting of a slurry of metal crystals in liquid metal, said column having a relatively hot zone and a continuous temperature gradient between said zones; the temperature of the cool zone being such as to permit coexistence of liquid and crystalline metal, and said hot zone being at a temperature sufficient to melt the crystals. A portion of the column in the said cool zone is chilled to form a coherent mass of crystals of the metal; then incipient melting in the mass is allowed to occur to release crystals from the mass into the column of the crystals in the liquid metal in the cool zone of said column. The crystals are transported through the temperature gradient and into the hot zone, wherein melting of the crystals occurs and the hot zone thereby becomes enriched with the pure liquid metal.

Abstract: A heat treatment plant comprising an assembly of refractory material adapted to receive a bath and containing a channel for a burner and optionally a channel for a flue, a framework adjacent to the refractory material, and at least one sub-frame mounted on the framework and adapted to receive a burner and flue. The burner and flue being capable of traversing the sub-frame in a direction transverse to that in which the sub-frame may traverse the framework.

Abstract: The support rail is intended to allow access both to the back and to the front of through-connecting connection blocks mounted on the support rail to form a connecting strip. The support rail is constituted by two bars held parallel to each other by two spacers which are spaced apart from each other and each of which comprises a parallelepipedical insulating block which has an upper surface, a lower surface, two longitudinal walls and two side surfaces, said block having a transverse channel which is parallel to each of said longitudinal walls, and which has a cross-section which corresponds to that of the bars and which has one of the bars passing through it, said channel having, on the side of the longitudinal wall a longitudinal slot which is open to said longitudinal wall and on the other side a longitudinal slot through which a tightening screw passes which is disposed through the block between its upper surface and its lower surface.

Abstract: A dual injector, floating-gate MOS non-volatile semiconductor memory device (DIFMOS) has been fabricated, wherein the electron injection means comprises a p+n+ junction, the n+ region thereof having a critical dopant concentration, controlled by ion implantation. The junction is avalanched to "write" a charge on the floating gate, and a hole injector junction (n+/p-) is avalanched to "erase" the charge. An MOS sensing transistor, whose gate is an extension of the floating gate, "reads" the presence or absence of charge on the floating gate. In a preferred embodiment, the hole injection means includes an MOS "bootstrap" capacitor for coupling a voltage bias to the floating gate.

Abstract: Slag pots are formed of an upper section formed of a plurality of wall units secured together, e.g. by electroslag welding and a lower floor portion engaged with the upper section, e.g. by a bolted joint. A trunnion ring may surround the upper portion to enable the pot to be lifted.

Abstract: A connector assembly including a plurality of male connector members each disposed for mating with a female connector member. Each female connector member is disposed on a support so that as the male and female connector members are urged together, electrical connection between all said pairs of male and female connector members does not occur simultaneously. Likewise as the connector members are urged apart, electrical connection is broken for some pairs of male and female connector members before others.