With Arc Deflection Means Patents (Class 373/64)
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Patent number: 6780146Abstract: Methods are provided for making slider-operated fasteners for use in reclosable plastic bags using at least a double index and dual unit operations. The methods involve forming two preseals, forming two notches within the preseals, applying two sliders into the previously formed notches, and applying two end stops proximate the previously applied sliders by having the various stations perform their respective functions, either simultaneously or at generally the same time, on different parts of the fastener spaced approximately at a double index. Also provided are methods of producing finished bags by applying the slider-operated fastener to a flat web of plastic film and conveying the web to a vertical or a horizontal form-fill-seal machine.Type: GrantFiled: September 17, 2002Date of Patent: August 24, 2004Assignee: Pactiv CorporationInventors: Toby R. Thomas, Nathan A. Kolovich, Craig E. Cappel, Timothy W. Pistner, Alexander R. Provan
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Publication number: 20030235231Abstract: A method of measuring the instantaneous parameters of a consumable electrode by: (a) providing a laser measuring device and positioning the laser measuring device in the vicinity of the electrode to be measured; (b) activating the laser measuring device to obtain data relating to the instantaneous parameters of the consumable electrode; and (c) transferring the data obtained from the laser measuring device to a computer data processing and storage device to determine the instantaneous parameters of the electrode.Type: ApplicationFiled: November 14, 2002Publication date: December 25, 2003Inventors: Hernan Rincon, Jorge Reyes
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Patent number: 6549557Abstract: An AC arc furnace has a plurality of electrodes arranged inside a furnace chamber enclosed by a shell. Each electrode is electrically connected to an electrode power source in series through corresponding auxiliary electromagnetic coils. The electromagnetic coils are arranged around the furnace shell in a pre-defined geometric pattern proximate the corresponding electrodes so that when each of the electrodes receives power from the power source and generates an arc inside the furnace, external magnetic fields are generated by the corresponding series connectedelectromagnetic coils. The external magnetic fields penetrate the shell to control deflection of the arcs caused by internal magnetic fields.Type: GrantFiled: May 18, 2001Date of Patent: April 15, 2003Assignee: UCAR Carbon Compan, Inc.Inventor: Brian Bowman
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Publication number: 20030039296Abstract: An AC arc furnace has a plurality of electrodes arranged inside a furnace chamber enclosed by a shell. Each electrode is electrically connected to an electrode power source in series through corresponding auxiliary electromagnetic coils. The electromagnetic coils are arranged around the furnace shell in a pre-defined geometric pattern proximate the corresponding electrodes so that when each of the electrodes receives power from the power source and generates an arc inside the furnace, external magnetic fields are generated by the corresponding series connectedelectromagnetic coils. The external magnetic fields penetrate the shell to control deflection of the arcs caused by internal magnetic fields.Type: ApplicationFiled: December 20, 2001Publication date: February 27, 2003Inventor: Brian Bowman
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Patent number: 5936996Abstract: A furnace plant which at least one furnace vessel with side walls and a bottom and at least one heat source which by radiation and convection heats molten metal and/or solid metal present in the furnace vessel. At least one two- or multiphase electromagnetic side stirrer is arranged in or near the wall of the furnace vessel to act through the wall and apply a stirrer field to the molten metal. The side stirrer comprises at least two phase windings arranged around an iron core having a vertical extent, H, which essentially covers the region, D.sub.max, between the bottom and the upper surface of the molten metal at a maximum bath depth used in the furnace 15 vessel. The side stirrer is arranged with a pole pitch.tau. which exceeds twice the distance from the iron core to the molten metal, .tau.>2 dw.Type: GrantFiled: January 6, 1998Date of Patent: August 10, 1999Assignee: Asea Brown Boveri ABInventors: Magnus Eidem, Per Henriksson, Lars Karlsson, Lars Nordekvist, Petter Oscarsson, Gunnar Sellberg, Gote Tallback
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Patent number: 5383218Abstract: Direct-current smelting furnace with control of deflection of the electric arc, which comprises an upper electrode (13) with relative return-flow lines and a plurality of bottom electrodes (11) positioned on the hearth of the furnace (12) and arranged in two or more assemblies, each assembly having its own controlled supply line connected to its own transformer (16), there being included downstream of each transformer (16) its own thyristor rectifier assembly (17) associated with its own means to control voltage (26), current (24) and firing angle (23), at least the lines supplying the bottom conductors (32) being at least partly screened in the vicinity of the melting furnace (12)Type: GrantFiled: July 20, 1993Date of Patent: January 17, 1995Assignee: Danieli & C. Officine Meccanicue SpA.Inventors: Kjell Bergman, Kenneth Lundstrom, Staffan Granstrom, Gensini Gianni, Giovanni Coassin
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Patent number: 5365542Abstract: An anode for a direct current arc furnace is proposed, in which at least part of the area of the furnace receiving the melt is provided on the inside with an electrically conductive refractory lining, which is electrically connected to the conductor located on the outside and in which a cathode is positioned vertically above the melt. The electrically conductive lining (3, 4; 9) and/or the conductor (1, 8) have varying values with respect to their electrical characteristics in the circumferential direction relative to the vertical axis of the cathode (2; 11), so that there is a planned, asymmetrical current distribution on the furnace bottom.Type: GrantFiled: September 20, 1993Date of Patent: November 15, 1994Assignee: Deutsch Voest-Alpine Industrieanlagenbau GmbHInventor: Edgar Nix
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Patent number: 5189682Abstract: The invention provides a direct current electric arc furnace which is composed of a feeding system of direct current to the furnace, a movable electrode at the roof of the furnace, and a bottom electrode attached to the bottom of the furnace at the position deviated from the center of the bottom of the furnace, the deviated distance from the center being determined by a magnetic field, generated by a current in the steel bath of the furnace, from under an arc generated by the movable electrode to the bottom electrode, which can cancel a second magnetic field generated by the current of the feeding system.Type: GrantFiled: March 26, 1992Date of Patent: February 23, 1993Assignee: NKK CorporationInventors: Toshimichi Maki, Takato Matsuo
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Patent number: 5138629Abstract: The invention provides a direct current electric arc furnace which is composed of a feeding system of direct current to the furnace, a movable electrode at the roof of the furnace, and a bottom electrode attached to the bottom of the furnace at the position deviated from the center of the bottom of the furnace, the deviated distance from the center being determined by a magnetic field, generated by a current in the steel bath of the furnace, from under an arc generated by the movable electrode to the bottom electrode, which can cancel a second magnetic field generated by the current of the feeding system.Type: GrantFiled: October 23, 1990Date of Patent: August 11, 1992Assignee: NKK CorporationInventors: Toshimichi Maki, Takato Matsuo
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Patent number: 4864096Abstract: A transferred arc torch is comprised of a first electrode surrounded by a coil. A second electrode is positioned adjacent to the first electrode so as to provide a small gap therebetween for striking an arc. The second electrode is configured to enable the arc to be transferred therefrom. The transferred arc torch may be used in conjunction with a vessel to provide a unique plasma reactor.Type: GrantFiled: December 18, 1987Date of Patent: September 5, 1989Assignee: Westinghouse Electric Corp.Inventors: Charles B. Wolf, William J. Melilli