Abstract: A briquet consists essentially of metallized iron fines, formed by direct reduction of iron oxide, granulated or fine silica, a carbon source such as coke breeze, and less than 3.5 percent of other components, or impurities. The briquet product has a density of from 2.0 to 6.0 g/cc, and is particularly well suited for steelmaking operations.The method for making the briquet is also disclosed.

Abstract: A rapidly adjustable bow sight, which includes a substantially vertical plate having an integral lever arm extending uwpardly and downwardly therefrom, a rotatable member journaled for rotation on the plate, a pin or blade extending horizontally from the rotatable member, and a connector arm pivotally attached to the upper extremity of the lever arm and to the rotatable member. The bow sight is adjustable with one finger of the hand grasping the bow, including while the bow string is drawn.

Abstract: The invention provides an ointment useful in treating skin irritations and promoting the healing of wounds. The preferred embodiment comprises a mixture of the raw gel of the aloe vera plant with a base, such as Aquaphor. A method for making the ointment composition is also disclosed.

Abstract: A fastener for attaching sheet metal or articles to sheet metal. The fastener is a self-locking sheet metal screw having a plurality of equally spaced teeth formed within a recess beneath the fastener head during the heading operation. The teeth preferably have curved trailing edges and straight or slightly inclined leading edges, and each extends laterally a different distance from the shank, as well as vertically a different distance along the shank, such lateral and vertical distances on a single tooth being equal.

Abstract: A method of producing a hot, carburized metallized iron product in a generally vertical shaft furnace having an upper reducing zone in which iron oxide reacts with a gaseous reductant, and a lower carbon control and product discharge zone, including: establishing a gravitationally descending iron oxide burden in the furnace; reacting hot gaseous reductant with the descending burden to form a metallized iron product and a reacted top gas; and injecting a hydrocarbon gas mixture consisting of hot reformed endothermic gas and cool natural gas to the product discharge section of the shaft furnace; whereby the carbon content of the metallized iron pellet product is controlled by mixing the endothermic gas and natural gas in the proper ratio to balance the endothermic and exothermic reactions within the discharge zone of the furnace.

Abstract: A method of producing iron from finely divided iron oxide comprising the steps of: mixing iron oxide or iron ore fines with finely divided coal and a binder to form a mixture, agglomerating the mixture by compacting, pelletizing, or briquetting the mixture to form agglomerates or pellets, introducing the pellets to a rotary hearth furnace to prereduce the iron in the pellets, introducing the prereduced pellets into a smelting reduction vessel as the metallic charge constituent, introducing particulate carbonaceous fuel and oxygen to the smelting reduction vessel through the bottom of the vessel to react with the melt or bath within the vessel, reduce the iron to elemental iron and form an off gas containing CO and H.sub.2 introducing the off-gas into the rotary hearth furnace as process gas to prereduce the pellets therein, and drawing off the hot metal from the smelting reduction vessel.The prereduced compacts are preferably discharged from the rotary hearth furnace at a temperature of at least 1000.degree.

Abstract: A fishing lure system, wherein a lure has a base section with a head portion and a body portion extending rearwardly from the head portion, a removable back adapted to engage the base, a removable nose or dive plane assembly inserted into a cavity in the underside of the head portion, and fishing line and hook attaching means. The lure system has interchangeable dive planes to accommodate different depths, interchangeable nose planes to provide different lure actions, and interchangeable backs to give the lure different colors.

Abstract: A screening and sizing apparatus for handling clusters or clumps of particulate material in which a roller table is provided with a series of equally spaced anvils or lugs for moving clusters of particulates across the rolls of the roller table and for breaking large lumps or clusters of material by forcing them against adjacent rolls or lugs. An alternative embodiment includes a tramp door through which large particles are passed to a separate bin or receptacle. Another alternative embodiment includes a cooperating, eccentrically mounted cluster breaker above the roller table.

Abstract: A highly efficient method and apparatus for production of molten iron using coal by coal gasification in a molten iron gasifier-melter. The gasifier-melter is coupled to a direct reduction shaft furnace and utilizes both the gaseous and solid output of the shaft furnace. The process is especially efficient when using non-metallurgical coals.

Abstract: An apparatus and method for charging a melting furnace having a charging opening in its sidewall, in which a closed housing contains a pivotally mounted receiving pan having a discharge chute on one side thereof, the discharge chute adapted to extend into the charging opening in the furnace sidewall; and means for moving the charging apparatus into the charging opening of the furnace and removing the apparatus to a position remote therefrom. A method for feeding the furnace over a predefined area, and continuously feeding the furnace during all phases of operation, including slagging and tapping, is also disclosed.

Abstract: Method and apparatus for crimping a round tenon for furniture manufacture, utilizing a crimping roll cluster consisting of a knurled drive roll and two idler compressing rolls. The apparatus includes means for feeding a wooden workpiece into and out of axial alignment with the crimping roll cluster; means for pressing the wooden workpiece into engagement with the knurled portion of the drive roll; means for rotating the workpiece from one to two revolutions, thus forming flutes into the tenon; and means for discharging the workpiece from the apparatus.Also disclosed is a method and apparatus for fluting a workpiece having tenons on both ends.

Abstract: A communication system for simultaneous exchange of signals between first and second stations in which a timing signal of low frequency alternately switches a first station between receive and transmit with equal time periods and simultaneously switches a second station between transmit and receive with the same time periods. During a receive period, signals for transmission are delayed until the next transmit period. During the transmit period, the delay signal is combined with the signal occupying the transmit period. The combined signal along with the timing signal is transmitted by the first station to the second station, after which the first radio station switches to receive under control of the timing signal. The second station under the control of the same timing signal now transmits a similar combined signal which is received by the first station for processing.

Abstract: A master key board device for the retention, protection, and control of keys. The device is preferably wall mountable, having a face plate containing slots for a desired number of keys. Each key slot has an associated locking device which is controlled by a universal key. The locking device carries an arm which engages specially modified keys to retain them in the key board, and releases them to persons having the proper universal key, but retains the universal key, so that keys can be removed from only one slot by each universal key.

Abstract: A water cooled roof for an electric arc furnace made up of a multiplicity of water cooled panels surrounded by a water distribution and collection ring, each portion of the roof being insulated from each other portion, including the roof panel, support arms and the roof rack. The invention provides a means for interrupting the flow of an inductive current around each electrode by creating a gap in the metal surrounding each electrode, thus insulating the furnace roof or cover from each phase of the three phase current.

Abstract: A solar furnace comprises a hollow tube, a concentrating lens at one end of the tube and a wooden base at the other end with a hole vertically through the base, whereby a cigarette, cigar or fishing line can be inserted in the hole and ignited by concentration of the sun's rays thereon.

Abstract: A method and apparatus for the continuous preheating of charge materials for an electric steelmaking furnace operation including provision for preheating with both off-gas from the furnace and burners in the preheating chamber. Seals are provided to prevent uncontrolled escape of gases from the chamber, and cooling air is also heated for use elsewhere. The invention contributes to the process of continuous steelmaking, including charging and tapping while maintaining full electric power, and having good control over both quality and product chemistry.

Abstract: A centrifugal switch for preventing overspeed of a rotary shaft driven by an electrical motor is arranged to open the electrical circuit to the starting windings at a predetermined speed of rotation. A split slip ring arrangement is engaged by metallic conducting elements urged into the conductive position by a compression means, which, when the compressive force is overcome, allows the contacts to move outward from the slip ring, to break the electrical contact. The critical rotational speed can be readily adjusted by changing the weight of the metallic conducting elements or by changing the tensile force of the compression spring.

Abstract: A method for forming a reducing gas in a molten metal bath gasifier and simultaneously directly reducing iron oxide in a shaft furnace with the gas thus produced, wherein the bath coolant is preferably provided by cleaned recycle gas from the direct reduction shaft furnace.

Abstract: The machine comprises an automobile vehicle provided with a pivoting boom to which is pivotably mounted a beam carrying a pivotally mounted swingle-bar to which is coupled a rotary plate for supporting a frame provided with guiding uprights for a sawing unit. Hydraulic cylinders and motors are provided for adjusting respective positions of the boom, beam, swingle-bar, rotary plate and motor means of the sawing unit. Means are provided to maintain the frame in a fixed position when working a sawing step.

Abstract: The device for cutting blocks of granite, marble, stone and other like materials by means of diamond blades displaced in a reciprocating movement by a blade carrying frame, said blade carrying frame being itself connected to a reciprocating motor unit, characterized in that at least the blade carrying frame is connected to a sliding frame by means of vibration damping means.