| Patents for H05B 7 - Heating by electric discharge (3,980) | 
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| 09/27/1994 | US5351267 Process for electrode control of a DC arc furnace, and an electrode control device | 
| 09/27/1994 | US5351266 Process for continuous manufacture of impurity and iron-free electrodes for electric arc furnaces | 
| 09/24/1994 | CA2119606A1 Evaporation vessel and electrode arrangement for an electrode evaporator | 
| 09/20/1994 | US5349605 DC arc torch power supply | 
| 09/06/1994 | CA2091091A1 Process for electrode control of a dc arc furnace, and an electrode control device | 
| 08/24/1994 | CN2175507Y Graphite composition electrode terminal conducting plate | 
| 08/16/1994 | CA2027479C Anode for a direct current arc furnace | 
| 08/10/1994 | EP0609466A1 Polyphase alternating current multi-electrode discharger, powdery waste disposal apparatus using this discharger, ozone generator, and light source apparatus | 
| 08/09/1994 | US5336015 Self centering electrode joint | 
| 08/04/1994 | WO1994016993A1 Process and device for producing carbon fullerenes from carbon-containing solid raw materials | 
| 07/26/1994 | US5333146 On-site, biohazardous waste disposal system | 
| 07/20/1994 | CN2172558Y Ore heating furnace electrode feeding implement | 
| 07/19/1994 | US5331661 Method and apparatus for controlling electroslag remelting | 
| 07/19/1994 | CA1330831C Electric arc generating device | 
| 07/13/1994 | CN2171968Y Tighten adjusting device for electric furnace electrode machinery | 
| 07/06/1994 | EP0604836A1 Method for making wear-resistant surface coatings on steel pieces and steel pieces with such coatings | 
| 06/21/1994 | US5323417 Metallurgical vessel for direct-current arc equipment | 
| 06/21/1994 | CA1330358C Furnace with auxiliary electrodes between main electrodes to reduce lining erosion | 
| 06/08/1994 | EP0600362A1 DC arc furnace and operation method | 
| 06/07/1994 | CA2029285C Direct current electric arc furnace | 
| 06/01/1994 | EP0599211A1 Self centering electrode joint | 
| 05/31/1994 | US5317591 Direct-current arc furnace | 
| 05/18/1994 | EP0597345A1 Conductor section for increasing the inductance of a cooled peak current cable | 
| 05/18/1994 | CN2165594Y Bottom anode for dc electric arc furnace | 
| 05/11/1994 | CN2164626Y Electrode lifting driver for steel-smelting electric arc furnace | 
| 05/03/1994 | US5308650 Vapor deposition and cladding with microwave pulsation | 
| 04/28/1994 | DE4236080A1 Operation of arc furnace - correcting estimation of energy required from material weights and specific energies, using final melt temperature | 
| 04/27/1994 | EP0594272A1 Electrode supporting arm for an electric arc furnace | 
| 04/20/1994 | CN1085726A Antioxidation processing technology for graphite electrode | 
| 04/19/1994 | US5304417 Graphite/carbon articles for elevated temperature service and method of manufacture | 
| 04/05/1994 | US5299785 Gas purging plug for electric-arc furnaces and the corresponding electric-arc furnace | 
| 03/30/1994 | EP0589544A2 Three phase arc furnace arrangement with inductor | 
| 03/30/1994 | EP0589150A1 Bottom electrode for direct current arc furnaces | 
| 03/22/1994 | US5297159 Direct current-light arc furnace | 
| 03/22/1994 | US5296672 Electric arc reactor having upstream and downstream electrodes | 
| 03/17/1994 | WO1994006184A1 Polyphase alternating current multi-electrode discharger, powdery waste disposal apparatus using this discharger, ozone generator, and light source apparatus | 
| 03/17/1994 | CA2121359A1 Polyphase alternating current multi-electrode discharger, powdery waste disposal apparatus using this discharger, ozone generator, and light source apparatus | 
| 03/16/1994 | CN1024045C DC electric-arc furnace | 
| 03/10/1994 | DE4229371A1 Regulating arc in metal melting, welding or plasma process - includes using second order differential of arc current w.r.t. time as regulating parameter | 
| 03/09/1994 | CN2158399Y Electricity supply equipment for prepn. of graphite | 
| 03/08/1994 | US5292109 Device for coupling the current feed to a metallurgical vessel | 
| 03/02/1994 | CN2158162Y Compensator | 
| 03/01/1994 | CA1327280C Sub-lance installation for carrying out measurements and/or taking samples in a metallurgical furnace | 
| 02/23/1994 | CN1082805A Technology for producing high power graphite electrode and its extruding apparatus | 
| 02/16/1994 | CN2156645Y Positive polar circuit device for continuous casting intermediate bag heating | 
| 02/16/1994 | CN1082186A Bottom electrode of DE arc furnace | 
| 02/15/1994 | US5287382 Wall electrode for a DC electric metallurgical furnace | 
| 02/03/1994 | WO1994003029A1 On-site, biohazardous waste disposal system | 
| 02/03/1994 | WO1994003028A1 Electrode holder | 
| 02/03/1994 | DE4225256A1 Elektrodentragvorrichtung Electrode support device | 
| 02/03/1994 | CA2141202A1 On-site, biohazardous waste disposal system | 
| 02/02/1994 | EP0581112A1 Direct current melting furnace with control of deflection of the electric arc | 
| 02/02/1994 | EP0580768A1 Improved control system for electric arc furnace | 
| 01/26/1994 | EP0472721B1 Direct current electric furnace | 
| 01/13/1994 | DE4222854A1 Base electrode for direct current arc furnaces - with metal rods arranged in hearth base, with non-conducting refractory layers surrounding the rods | 
| 01/13/1994 | DE4220588A1 Arc evaporation device for target - has shield round the periphery of the target to prevent edge contact by the arc | 
| 01/11/1994 | US5277938 Controlling the electron beam movement | 
| 01/05/1994 | EP0577344A1 Material treatment method and apparatus | 
| 01/05/1994 | DE4223592A1 Arc vaporising apparatus - with movable magnetic coil below target to adjust magnetic field and ensure uniform target vaporisation | 
| 12/29/1993 | EP0575589A1 Controlled power supply | 
| 12/28/1993 | US5274664 Method and device to control the force applied to the electrode-bearing arms of an electric arc furnace | 
| 12/28/1993 | US5274663 Direct-current arc furnace plant | 
| 12/22/1993 | EP0575271A1 Electrode nipple for electric furnace | 
| 12/22/1993 | CN2150508Y Cooper-steel composite water-cooling AC electric-arc furnace floor positive electrode | 
| 12/19/1993 | CA2098668A1 Electric furnace electrode coupling joint | 
| 12/07/1993 | US5268924 Bottom structure for a DC electric arc furnace | 
| 12/01/1993 | CN2148453Y Constant temp. radiator for electric controller | 
| 11/24/1993 | EP0571183A1 Corona electrodes | 
| 11/18/1993 | DE4215897A1 Graphite electrode with inclined surfaces for arc furnace - has surface surrounding central threaded portion set at acute angle to plane of extremity of cylindrical sleeve | 
| 11/09/1993 | US5260966 Remelting arc furnace with movable electrode | 
| 11/03/1993 | EP0567621A1 Melt-in aggregate with furnace cradle | 
| 10/26/1993 | CA1323670C Electric arc reactor | 
| 10/19/1993 | US5255285 Feedback control system for the impedance control of an electric arc furnace | 
| 10/19/1993 | US5255284 Anode for an electic arc furnace utilizing electrode segments | 
| 10/19/1993 | US5254359 Method of forming titanium nitride coatings on carbon/graphite substrates by electric arc thermal spray process using titanium feed wire and nitrogen as the atomizing gas | 
| 10/13/1993 | CN1077328A A torch device for chemical processes | 
| 10/07/1993 | DE4210798A1 Metal vapour deposition plant using thermal arcing process - uses two wires to generate arc observed by optical sensor to provide feedback to regulate feeding of wire | 
| 10/06/1993 | EP0563736A1 Process and apparatus for the continuous surface treatment of wire rods with metallic surface | 
| 10/06/1993 | EP0563735A1 Corrosion resistant composite wire and process for its manufacture | 
| 10/06/1993 | CN1022367C Boronated carbon products and their production | 
| 10/05/1993 | US5250779 Method and apparatus for heating-up a substrate by means of a low voltage arc discharge and variable magnetic field | 
| 10/01/1993 | CA2093036A1 Corrosion-resistant composite wire and method for manufacturing same | 
| 10/01/1993 | CA2093035A1 Method and device for continuous surface treatment of bar-shaped elongated materials having a metal surface | 
| 09/21/1993 | US5247144 Levitation heating method and levitation heating furnace | 
| 09/15/1993 | EP0560526A1 Method and apparatus for carrying out surface treatment | 
| 09/08/1993 | EP0559390A2 Method and apparatus for joining new electrode to consumed electrode of electric furnace | 
| 09/08/1993 | EP0387344B1 Very high temperature heating device | 
| 09/02/1993 | WO1993017533A1 A method for measuring the electric quantities of an ac electric-arc furnace | 
| 08/25/1993 | CN1075542A Anode for a direct-current electric arc furnace | 
| 08/24/1993 | US5239554 Direct-arc electric furnace fed with controlled current and method to feed a direct-arc furnace with controlled current | 
| 08/18/1993 | EP0309583B1 Method of melting and refining metals, and an apparatus for cooling electrodes used therefor | 
| 08/17/1993 | US5237585 Direct-current arc furnace having circumferential zones of varying conductivity | 
| 08/11/1993 | EP0414759B1 Wear-resistant electrode for direct current arc furnaces | 
| 08/10/1993 | US5235611 Stepped end rotary furnace | 
| 08/10/1993 | CA1321074C Process for continuous melting of scrap metal in a dc electric furnace, and electric furnace for implementing that process | 
| 08/03/1993 | US5233625 Metallurgical vessel with metallic electrode having readily replaceable wear part | 
| 07/28/1993 | EP0533740A4 A dc arc torch power supply | 
| 07/27/1993 | CA1320645C Process for melting scrap metal and electric furnace for implementing the process | 
| 07/22/1993 | WO1993014557A1 Controlled power supply | 
| 07/22/1993 | DE4200329A1 Regelbare speisestromquelle Adjustable food source of |