Patents Assigned to United States Steel Corporation
  • Patent number: 4374944
    Abstract: Coal tar pitch is blended with ABS (acrylonitrile-butadiene-styrene) molding or extrusion composition. The product produced therefrom is superior in some ways for applications such as pipe manufacture and meets generally accepted specifications therefor. Furthermore, such a product is less expensive than an ABS product without the coal tar pitch additive.
    Type: Grant
    Filed: March 18, 1981
    Date of Patent: February 22, 1983
    Assignee: United States Steel Corporation
    Inventors: Donald G. Ashburn, Glendon T. Steady
  • Patent number: 4374719
    Abstract: A system is provided for the electrolytic cleaning of metal wire which is arranged generally in horizontal, overlapped non-concentric loop form. The system includes a container for holding an electrolyte, means for conveying the wire in loop form through the electrolyte, and a plurality of tandem electrodes of opposite polarity separated by non-conductive barriers. The elongated electrodes include a wrap-around portion at each of their opposite ends. Each wrap-around portion provides from 5 to 35 percent additional electrode area which enables more effective cleaning to be accomplished adjacent the outer edges of the wire loops.
    Type: Grant
    Filed: March 19, 1982
    Date of Patent: February 22, 1983
    Assignee: United States Steel Corporation
    Inventors: Frank W. Bakewell, Charles D. Stricker
  • Patent number: 4370087
    Abstract: Mechanical dumping apparatus is described that is adapted for use in a zinc powder galvanizing system. The apparatus is effective to confine the powder during the dumping operation in order to minimize operator exposure to the harmful effects thereof. Mechanism provided for inverting the container includes a lid closure device incorporating a slide gate for controllably discharging the contents of the container when in its inverted mode.
    Type: Grant
    Filed: November 13, 1980
    Date of Patent: January 25, 1983
    Assignee: United States Steel Corporation
    Inventor: James N. Shepard
  • Patent number: 4370225
    Abstract: This invention relates to improvements in a dry magnetic separation system for increasing the recovery of magnetic ore from the feed material. The system includes a separator which has a magnetic head-pulley assembly mounted in one end of an endless belt conveyor loop. When the conveyor is run at high speeds some of the ore is thrown off the head-end of the belt instead of being retained on it by the magnetic pulley. Those ore particles that are retained are carried onto the lower flight of the belt from which they are dropped into an ore chute. To recover the magnetic portion of the "thrown" ore, an adjustable splitter is located outwardly of the pulley-head at a lower elevation than the belt. The splitter also directs these partially magnetic particles into the ore chute and the non-magnetics to a tailings chute.
    Type: Grant
    Filed: August 24, 1981
    Date of Patent: January 25, 1983
    Assignee: United States Steel Corporation
    Inventors: John P. Bingel, Robert W. Salmi
  • Patent number: 4369802
    Abstract: Plural strands of wire emerging from the cooling tower of a galvanizing line are cooled from about an elevated temperature to ambient temperature by heat exchange apparatus in which the strands are passed through an agitated, flowing stream of cooling water. The apparatus is designed to accommodate knots that connect strands in end-to-end relation or other strand surface irregularities. It also permits disorientation of the strands from their respective pass lines without disrupting operation of the apparatus.
    Type: Grant
    Filed: July 8, 1981
    Date of Patent: January 25, 1983
    Assignee: United States Steel Corporation
    Inventors: Clifford K. F. Chou, Paul McCarthy
  • Patent number: 4370240
    Abstract: Weakly basic ion exchange resins are used to remove iron compounds in anhydrous or substantially anhydrous organic systems such as phenolic process streams. The resins may be either in the form of a weak salt such as the amine hydrochloride or may be a protonated amine carboxylic acid in the acidic form. In either case, we have determined that the active site does not perform in a conventional ion exchange manner but rather forms a complex with the entire iron compound molecule. While the complex is formed in a waterless or almost waterless system, it may be regenerated in an aqueous system.
    Type: Grant
    Filed: June 10, 1981
    Date of Patent: January 25, 1983
    Assignee: United States Steel Corporation
    Inventors: George L. Brownell, William R. Davie, Marvin C. Fields
  • Patent number: 4370161
    Abstract: A process and apparatus for producing a low sulfur content hot reducing gas by desulfurizing hot reducing gas by contacting the sulfur-bearing hot reducing gas or carbonaceous material with a particulate calcium oxide desulfurizing agent to thereby produce a product gas stream and a byproduct calcium sulfide composition, and then recovering sulfur from the calcium sulfide composition by contacting the calcium sulfide composition with hot liquid water at a temperature and corresponding pressure sufficient to maintain steam in the system and wherein a major portion of the calcium sulfide composition has a particle size of less than about 6 mesh to thereby convert the sulfide to calcium hydroxide and hydrogen sulfide. A preferred process uses this low sulfur content gas to reduce iron ore, and especially wherein ore, calcium oxide and carbonaceous material are reacted in a shaft furnace.
    Type: Grant
    Filed: May 7, 1981
    Date of Patent: January 25, 1983
    Assignee: United States Steel Corporation
    Inventor: Ethem T. Turkdogan
  • Patent number: 4370201
    Abstract: A process is described for maintaining the proportions of each coal in a coal blend at a desired level. The process involves(1) making a spectral analysis, preferably by infrared spectrometry, of at least one sample of the coal blend, the sample having known desired proportions of each coal,(2) making a spectral analysis of the coal blend sample of unknown proportions of each coal,(3) comparing the spectral analyses of steps (1) and (2), and(4) upon noting a significant difference between the spectral analyses of steps (1) and (2), making adjustments to achieve a final coal blend having proportions of each coal closer to those of the blend of known desired proportions of each coal. The relationship of the aromatic to aliphatic groupings is preferably determined by spectral analysis of each coal sample.This process is particularly useful on-line in the production of blast furnace coke of high strength and high stability.
    Type: Grant
    Filed: June 23, 1981
    Date of Patent: January 25, 1983
    Assignee: United States Steel Corporation
    Inventor: Douglas E. Lowenhaupt
  • Patent number: 4366064
    Abstract: Wastewater, particularly blowdown from a recycle gas-scrubbing and gas-cooling system of a blast furnace, is treated in a two-stage chlorination unit, the first stage including a chlorine addition at a pH of about 8.5 to about 10, preferably 9-9.5, and the second stage continuing the chlorination reaction at a pH of about 6 to about 8, preferably 7-7.5, while monitoring the oxidation-reduction potential of the second stage to utilize as a control point for chlorine addition in the first stage. Various contaminants, notably the nitrogen-containing compounds, are destroyed in the chlorination steps. A caustic or lime pretreatment is preferred for scale control at a pH of about 10.5 to about 11, preferably 10.7, while lime pretreatment is performed at a pH of about 9.6 to about 10, preferably 9.8. After chlorination, the process stream is preferably passed through activated carbon to remove organics.
    Type: Grant
    Filed: November 5, 1981
    Date of Patent: December 28, 1982
    Assignee: United States Steel Corporation
    Inventors: Edward L. Mihelic, Samuel B. Schlosberg
  • Patent number: 4364468
    Abstract: This invention relates to apparatus for coordinating the indexing movement of a conveyor with pivotal movement of a kickout arm for removing workpieces from its delivery end. A double acting fluid powered cylinder alternately indexes the loop and pivots the kickout upon reciprocating movement of first and second piston rods thereof. Preferably, a rack is provided extending axially from the first of the rods. A pinion engages the rack and is operatively connected and disconnected from the loop by a clutch upon stroke of the rod in opposite directions. A collet operatively connects the second piston rod to the kickout arm when the loop is at rest and disconnects said arm therefrom when the loop is being driven.
    Type: Grant
    Filed: March 6, 1981
    Date of Patent: December 21, 1982
    Assignee: United States Steel Corporation
    Inventors: Andrew A. Hetra, Jr., Charles W. Jacob
  • Patent number: 4363172
    Abstract: An apparatus is provided for measuring roll eccentricity. It includes a housing adapted for guided transport in a reference direction tangent to the roll face. The housing is also adapted to rotate the roll at the speed of transport. An elongated runner extending lengthwise in the transport direction is displaceably mounted in the housing. The roll face abuts and displaces the runner but the runner mounting maintains it parallel to the transport direction. Thus, measurements of runner displacement at any point along its length provide an indication of eccentricity of the roll.
    Type: Grant
    Filed: April 17, 1981
    Date of Patent: December 14, 1982
    Assignee: United States Steel Corporation
    Inventor: Kenneth D. Ives
  • Patent number: 4363470
    Abstract: Apparatus is provided for preventing reaction forces on a flow control valve from affecting measurements of particulate feed rate, where such measurements are made using weighing devices to determine the amount of particulates in a supply container as a function of time. The apparatus includes means for applying sufficient compressive prestress to spacer bars for absorbing reaction forces on the valve so that extension of the staybars is prevented during particulate feeding. Movement of the container due to reaction forces on the valve is prevented and particulate feed rate errors are substantially eliminated.
    Type: Grant
    Filed: December 2, 1981
    Date of Patent: December 14, 1982
    Assignee: United States Steel Corporation
    Inventor: Kenneth D. Ives
  • Patent number: 4357765
    Abstract: An improvement is provided in apparatus for securing overlapped portions of two members together. In addition to a wedge conventionally inserted in holes generally axially aligned in the overlapped portions, a locking bar is provided for insertion longitudinally in the holes and has a notch with opposed faces for tightly engaging the outer surfaces of one of the members which is subject to less flexing movement than the other. The wedge and bar are secured together after insertion to prevent loosening of the wedge in service.
    Type: Grant
    Filed: July 8, 1981
    Date of Patent: November 9, 1982
    Assignee: United States Steel Corporation
    Inventor: James E. Seykora
  • Patent number: 4353688
    Abstract: A hot blast stove for use with high capacity blast furnaces incorporates a gas flow baffle particularly configured for improving mixture of combustion air and gas within the combustion chamber to enhance fuel burning characteristics with a concomitant reduction in pressure-pulsation experienced within the system and without an appreciable reduction in fuel firing rate.
    Type: Grant
    Filed: March 12, 1981
    Date of Patent: October 12, 1982
    Assignee: United States Steel Corporation
    Inventors: Walter D. Ahner, James B. Malosh
  • Patent number: 4354085
    Abstract: Improved apparatus is provided for spreading the seam edges of formed large diameter pipe so that it can be mounted more quickly onto the arbor of a welder. The conventional spreader apparatus comprised of a fixed straight arm with rollers on opposite ends has at least one cylinder axially substituted for at least part of its length so that the rollers are retractable. The cylinder is mounted in a bracket and freely slidable back and forth axially so as to be self-centering thus preventing displacement of the seam from proper alignment with the arbor as it is spread preparatory to movement thereon. Preferably, a pair of cylinders are provided attached in back to back relation with a roller connected to each piston rod thereof.
    Type: Grant
    Filed: December 29, 1980
    Date of Patent: October 12, 1982
    Assignee: United States Steel Corporation
    Inventors: Kenneth E. George, Jr., Douglas E. Alexander
  • Patent number: 4342215
    Abstract: A wire feed mechanism for use in conjunction with a nail forming machine. The wire feed includes a wire clamping device connected through appropriate linkages to a reciprocating hammerslide located within the nail machine. The hammerslide is movable between extended and retracted positions for forming the nail head. Due to the direct positive linkage between the hammerslide and the wire clamping device, feeding movement of the wire into the nail machine is achieved as a direct result of hammerslide movement, thereby obviating the need for cumbersome and elaborate linkages currently in use.
    Type: Grant
    Filed: October 9, 1980
    Date of Patent: August 3, 1982
    Assignee: United States Steel Corporation
    Inventor: Ronald L. Van Horn
  • Patent number: 4342487
    Abstract: A drill steel support assembly for a mining roof bolting machine is presented. The assembly is utilized for retaining and guiding a drill steel on a roof bolting machine during the collaring of the drill steel in the mine roof. Once collared, the drill steel is released by the retaining assembly inasmuch as the latter is not necessary for support purposes after collaring has occurred. The release of the drill steel from the retaining assembly is accomplished when the vibrations from the drill steel are sufficient to open the support mechanism once the drill has been collared.
    Type: Grant
    Filed: February 29, 1980
    Date of Patent: August 3, 1982
    Assignee: United States Steel Corporation
    Inventors: J. Alan Fowler, George S. Haller, C. David Rogers
  • Patent number: 4340616
    Abstract: The wear on surfaces subject to abrasion or erosion by abrasive particles is materially reduced or eliminated by providing such surface with a magnetic attraction sufficient to hold an amount of magnetic or magnetizable particles to provide a sacrificial layer of such particles, whereby such layer acts to protect the surface lying thereunder from wear.
    Type: Grant
    Filed: February 19, 1980
    Date of Patent: July 20, 1982
    Assignee: United States Steel Corporation
    Inventor: James D. Weinert
  • Patent number: 4332085
    Abstract: Apparatus is described for mechanically determining the helix height of a preformed strand containing a plurality of helically wound wires for use in the production of wire rope. The apparatus includes a base support for maintaining the dimensional integrity of the strand during the measurement procedure; plural adjustable sensors for determining the locus of the outer peripheral points at a plurality of locations along the length of the strand in order to obtain a sample along an extended length of the strand; and means for conveniently and accurately determining a representative helix height over the concerned strand length.
    Type: Grant
    Filed: July 10, 1980
    Date of Patent: June 1, 1982
    Assignee: United States Steel Corporation
    Inventors: John Jacko, William F. Stack
  • Patent number: 4327635
    Abstract: A marking apparatus is provided having a wheel with a plurality of radial slots for receipt of stamps having marking indicia thereon. An internal axially rotatable disc has a cam engageable with the stamp ends causing selected ones to protrude from the wheel periphery. A slot in the disc receives a lateral extension from each stamp for retaining them in retracted position. A segment of the slot adjacent the cam curves radially outward to allow the stamp contacted by the cam to slide outward and protrude from the wheel.
    Type: Grant
    Filed: May 29, 1980
    Date of Patent: May 4, 1982
    Assignee: United States Steel Corporation
    Inventors: Calvin E. Kelly, Robert A. Wilshire