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| Number | Title | Issue Date |
| 6470040 | Energy supply device of a melting tank The invention relates to an energy supply device of a melting tank. According to the invention, between an electrode plane of the melting tank and a converter for the current supply of the electrode plane, a separatable plug connection is provided in the ... | 10/22/2002 |
| 6157666 | Controlled current feed device for electric arc furnace Controlled current feed device for electric arc furnace employed to melt metals, wherein the feed line comprises at least a medium tension bar (13), a feed control device and a transformer (17) serving the furnace, the feed control device (16) being arran... | 12/05/2000 |
| 5960027 | Apparatus for controlling arc deflection in an arc furnace An arc control apparatus for a DC arc furnace provides an additional magnetic field which prevents a discharged arc from shifting outward at an arc generating point due to the influences of a magnetic field generated by a feeder circuit, thus directing th... | 09/28/1999 |
| 5889811 | Arrangement for transferring electrical energy from a furnace transformer to the electrodes of a three-phase arc furnace An apparatus for transferring the electrical energy from a furnace transformer to the electrodes of a three-phase arc furnace held by coplanar mast arms. A mast arm for the center current phase is made of aluminum or a material with a similar permeability... | 03/30/1999 |
| 5844933 | Electrode arrangement for direct current and furnace A d.c. arc furnace for metallurgical purposes includes two or more electrodes arranged on the furnace vessel and projecting into the furnace vessel. To avoid actions of forces departing from the magnetic fields derived form the currents conducted to the e... | 12/01/1998 |
| 5787109 | Furnace vessel for a DC arc furnace The furnace vessel for a DC arc furnace has a thermostable wall which preferably consists, in the region situated above the slag line (S), of a plurality of water-cooled wall segments (1) made from steel. These wall segments are fastened to a support stru... | 07/28/1998 |
| 5715273 | Secondary circuit with variable impedance for electric arc furnaces A secondary circuit having a variable impedance for electric arc furnaces of a type working with alternating current, which is associated with a transformer (11) is disclosed. A secondary circuit comprises at least one rigid connection (12) connected to t... | 02/03/1998 |
| 5590152 | DC arc furnace Two upper electrodes 16 and 17 are horizontally spaced apart from each other with a predetermined distance and vertically extend through a furnace roof 3 of a furnace shell 2. Upper conductors 20 and 21 are connected to the upper electrodes 16 and 17 and ... | 12/31/1996 |
| 5410564 | Direct current electric furnace for melting metal According to the present invention, there is provided a direct current electric furnace for melting metal capable of melting scraps rapidly and also capable of diminishing cold and hot spots formed on the furnace wall, wherein the direct current electric ... | 04/25/1995 |
| 5274663 | Direct-current arc furnace plant In direct-current arc furnace the arc is deflected in a direction away from the current supply means (19) through the action of the high-current lines (18) extending under the furnace vessel. This leads to the thermal overloading of a part of the furnace ... | 12/28/1993 |
| 5204873 | DC electric arc melting apparatus Two DC electric arc furnaces are provided side by side. The both DC electric arc furnaces are connected by a duct. Each of two power source apparatuses is mounted near and associated with each of the DC electric arc furnaces. The anodes of the both power ... | 04/20/1993 |
| 5115447 | Arc furnace electrode control System for controlling the positions of each of the three electrodes of a three phase electric furnace to maintain optimum real power delivered to the furnace in the event of electrode short circuiting or arc extinction due to scrap movement in the furnac... | 05/19/1992 |
| 4682341 | Electric arc furnace In an electric arc furnace having a fluid-cooled electrode support arm which is provided with an electrode holding means, the outside of the electrode support arm is plated with cooper and the electrode holding means is electrically insulated with respect... | 07/21/1987 |
| 4577326 | DC Arc furnace hearth connection A DC arc furnace having a vertical arcing electrode adapted to be connected with a negative current lead and a hearth adapted to contain a melt below the electrode and having a hearth electrode, the hearth electrode extending laterally from the axis of th... | 03/18/1986 |
| 4490827 | Feeding electric current to twin-vessel arc furnaces The disclosed arrangement refers specifically to a smelting arrangement which includes two metallurgical vessels serviced by a common, electrode carrying lid which is pivoted about a vertical axis as between one or the other position in relation to the tw... | 12/25/1984 |
| 4435817 | Contact assembly The disclosed invention is an apparatus for connecting two current conducting tubes, which also conduct fluids such as for example, a coolant. The connection apparatus conducts current from one tube to the other through a sleeve, the said tubes having a m... | 03/06/1984 |
| 4425658 | Conductor arrangement for a three-phase electric arc furnace An electrode and conductor arrangement for a three-phase electric arc furnace supplied with power from a transformer, including three electrodes which extend downwardly into the furnace, and a plurality of current conducting paths each composed of a rigid... | 01/10/1984 |
| 4403328 | DC Arc furnace power connection system A DC arc furnace has power lines arranged completely symmetrically with respect to the arc so as to prevent the arc from bending angularly.... | 09/06/1983 |
| 4356340 | DC Arc furnace having a shielded arc A DC arc furnace has shielding between the arc and its power lines preventing or retarding the magnetic field created by the power lines from deflecting the arc.... | 10/26/1982 |
| 4170712 | Tiltable arc furnace An arc furnace which is supplied by means of alternating current by way of heavy-current conductors, with liftable electrode carrier arms, wherein the heavy-current conductors can be separated from each other by means of releasable electrical couplings.... | 10/09/1979 |
| 4153812 | Bus bar assembly Bus bars for connecting arc furnance electrodes to a transformer include pairs of flat, rectangular, hollow, conductive members having side surfaces substantially greater in length than the end surfaces. One side surfaces of the bus bar of each pair are d... | 05/08/1979 |
| 4018975 | Suspension means for electric furnace transformer secondary buses An electric furnace supply transformer is inside of a room or vault where roof beams extend in cantilever fashion over a wall of the vault. Secondary buses from the transformer extend through clearance holes in the wall and engage with vertical posts that... | 04/19/1977 |
