Patents Assigned to Heraeus Elektroden GmbH
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Patent number: 5609748Abstract: For cathodic protection against corrosion of steel reinforcements in reinforced steel constructions, a prefabricated anode is provided which has a core of titanium expanded metal provided with an activation layer and with a cement-containing ion-conductive jacket; the prefabricated anode is immovably secured to the reinforced concrete construction in an ion-conductive bond; after that, the reinforcement of the concrete construction and the core of the anode are connected to the poles of a direct voltage source.Type: GrantFiled: May 31, 1995Date of Patent: March 11, 1997Assignee: Heraeus Elektroden GmbHInventors: Stephan Kotowski, Reinhard Bedel, Bernd Busse
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Patent number: 5141616Abstract: Cathode includes a drum at least partly immersed in a metal ion solution and a flexible metallic band passing around the drum and driven by a drive roller outside the solution, both the cathode drum and the drive roller having axes which form an angle with a surface normal of the solution ranging between 20 and 70 degrees.Type: GrantFiled: July 23, 1991Date of Patent: August 25, 1992Assignee: Heraeus Elektroden GmbHInventor: Harri Heinke
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Patent number: 5135633Abstract: An anode arrangement used in electrolytic processes for steel strip galvanizing or chrome-plating has a plate-like anode of titanium with an active surface, which is connected to a generally planar carrier having a steel core and a current supply conductor comprising a sleeve element and a bushing element. The core has a passage extending through it to receive the bushing element, and, for protection against attack by the electrolytic solution, the core is loosely surrounded by an envelope of titanium foil; in the region of the bushing element, the envelope has passages, the edges of which are welded to the bushing element in a gas-tight and fluid-tight manner.Type: GrantFiled: November 21, 1990Date of Patent: August 4, 1992Assignee: Heraeus Elektroden GmbHInventors: Stefan Kotowski, Rudiger Weinhardt, Gerhardt Dehm, Reinhard Koch
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Patent number: 5087344Abstract: An electrolysis cell for gas-evolving electrolytic processes using at least one electrode having electrode elements arranged parallel is described; the electrode elements have a thickness of up to three times the mean bubble separation diameter and have a capillary gap with respect to one another such that a motion of the gas bubbles through the electrode is brought about substantially in the direction or in the opposite direction of the electric field between the reaction surfaces of the anode and cathode.Type: GrantFiled: September 26, 1990Date of Patent: February 11, 1992Assignee: Heraeus Elektroden GmbHInventors: Hanno Wenske, Arnold Gallien, Wolfgang Hanke, Wolfgang Lampe, Lothar Illgen
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Patent number: 4963244Abstract: Process for the visual inspection of an electrode (anode) having an activated layer for electrogalvanizing plants for steel bands in which the electrode to be tested is inserted between anode and cathode of a sodium sulfate electrolytic cell with the surface to be tested facing toward the cathode. After a voltage is applied the development of the gas bubbles on the activated layer is monitored by means of a video camera.Type: GrantFiled: January 23, 1990Date of Patent: October 16, 1990Assignee: Heraeus Elektroden GmbHInventors: Stephan Kotowski, Bernd Busse, Bernd Donnerhak
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Patent number: 4946571Abstract: Electrodes for electrochemical treatment of metal strips, in particular for electrolytically coating metal strips, in which a plurality of spacer elements having an electrically insulating surface protrude from the electrode surface facing the strip to be treated during operation, are known. In order to devise an electrode that has a longer service life than known electrodes, the spacer elements are spacer rollers aligned in the same travel direction with respect to one another, and the roller diameter is between 20 and 60 mm.Type: GrantFiled: October 17, 1988Date of Patent: August 7, 1990Assignee: Heraeus Elektroden GmbHInventors: Heinrich Simon, Reinhard Koch
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Patent number: 4919766Abstract: Process for the visual inspection of an electrode (anode) having an activated layer for electrogalvanizing plants for steel bands in which the electrode to be tested is inserted between anode and cathode of a sodium sulfate electrolytic cell with the surface to be tested facing toward the cathode. After a voltage is applied the development of the gas bubbles on the activated layer is monitored by means of a video camera.Type: GrantFiled: September 6, 1989Date of Patent: April 24, 1990Assignee: Heraeus Elektroden GmbHInventors: Stephan Kotowski, Bernd Busse, Bernd Donnerhak
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Patent number: 4855032Abstract: An electrode structure for membrane electrolysis cells comprises a planar electrode part which is joined by metal spacers to a sheet metal support serving as current distributor. The spacers are made in the form of a spring clip mounting comprising a spring part and a springless part, the spring part being fixedly joined to the support while the springless part is integral with the electrode part. In case of the need to reactivate or repair the active electrode parts the spring clip mounting permits them to be separated easily from their supports and then they can be sent away directly for reactivation or repair.Type: GrantFiled: July 22, 1988Date of Patent: August 8, 1989Assignee: Heraeus Elektroden GmbHInventors: Peter Fabian, Helmut Krebs, Heinrich Simon
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Patent number: 4786384Abstract: To provide for essentially uniform current density at the respective cathodes of an electrolytic cell, a plurality of cathodes are located, spaced from each other, at one side of an anode, and resistance elements connect the respective cathodes to a negative supply terminal or supply bus (N, 11), the resistance elements having respective resistance values which decrease as the distance of the respective cathode from the anode increases. A single anode (2), preferably separated from the cathode space (5) by an ion exchange membrane (6), can be located centrally within the cathodes; or two anodes can be located spaced from each other with a plurality of cathodes located therebetween. Each cathode is connected with a quick disconnect plug-or-push terminal to the respective current supply, which may be a controlled constant current source.Type: GrantFiled: November 18, 1987Date of Patent: November 22, 1988Assignee: Heraeus Elektroden GmbHInventors: Wolfgang Gerhardt, Wolfgang Gehlert, Edgar Gluck
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Patent number: 4564433Abstract: A bipolar electrode has plate-like anode and cathode parts. The anode and cathode parts are secured together, edge-to-edge, to form a single element in one plane by an intermediate connecting piece. The intermediate connecting piece itself is a composite element having parts of materials which are compatible with the respectively adjacent anode and cathode. The two parts of the composite element are joined together by hot isostatic pressure, explosion-plating or diffusion-welding into the composite body, the resultant composite body then permitting welding of the respective anode and cathode plates to the respective anode part and cathode part of the composite element or body.Type: GrantFiled: June 21, 1984Date of Patent: January 14, 1986Assignee: Heraeus Elektroden GmbHInventors: Waltraud Werdecker, Peter Fabian
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Patent number: 4448660Abstract: A monitoring and control apparatus for flowing mercury electrolytic cells by measurement of the voltage drop in the shunted feed line of each electrode group comprising taps at the ends of a measured section of electrical bus bars for each electrode group electrically connected to a measuring means whereby the measured voltage drop is fed as an amplified signal to the measuring means, a control means set for a value from the total cell current divided by the number of taps comparing the actual measured values at various feed lines and a signal means activated when a set excess current is exceeded and to actuate the adjusters for a group of electrodes to lift the electrodes stepwise by an adjustable amount until excess current is not measured by comparison indicating that the feed line is no longer overloaded and a method of monitoring electric current in a mercury cell.Type: GrantFiled: June 17, 1982Date of Patent: May 15, 1984Assignee: Heraeus Elektroden GmbHInventor: Peter Fabian
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Patent number: 4392927Abstract: A composite electrode comprising an electroconductive base with an electrolyte inert, electroconductive electrocatalytic layer applied by thermal spraying, the said layer being a powder of a matrix material selected from the group consisting of oxides, nitrides, phosphides, silicides, borides and carbides of a metal selected from the group consisting of boron, valve metals and iron group metals having uniformly deposited thereon electrocatalytically active particles of a metal selected from the group consisting of platinum group metals and iron group metals and oxides thereof with a particle size smaller by at least one order of magnitude of the matrix particles and electrolytic cells containing the same and electrolytic processes using the same.Type: GrantFiled: February 18, 1982Date of Patent: July 12, 1983Assignee: Heraeus Elektroden GmbHInventors: Peter Fabian, Theo Muller
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Patent number: 4364811Abstract: This invention relates to electrodes for electrolytic cells. More particularly, this invention relates to electrodes for an electrolytic cell comprising:(a) means for supplying electric current;(b) a main current distributor;(c) rectangular-sectioned conductors having flat activated electrode faces and arranged standing upright, the ratio of the width to height of a cross-section being from about 1:5 to about 2:3; and(d) flat, rectangular-sectioned current distributors arranged perpendicularly to the conductors (c) and spaced from about 30 to about 150 mm apart, the ratio of the width to height of a cross-section being smaller than that for the cross-section of conductors (c), the ratio of free passage area to projected area in the zone of the conductors (c) being from about 20:30 to about 60:80 and conductors (c) being connected to current distributors (d), which are in turn connected to main current distributor (b).Type: GrantFiled: December 3, 1980Date of Patent: December 21, 1982Assignee: Heraeus Elektroden GmbHInventors: Peter Fabian, Karlheinz Eisenhuth, Ernst Jedlitschka, Helmut Krebs
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Patent number: 4088558Abstract: A novel method of renewing electrode surfaces of metal electrodes with elongated supporting riser with at least the surface thereof being comprised of a valve metal or valve metal alloy supporting a generally planar electrode member with an electrocatalytic coating thereon.Type: GrantFiled: September 16, 1977Date of Patent: May 9, 1978Assignee: Heraeus Elektroden GmbHInventors: Peter Fabian, Ernst Jedlitschka, Helmut Krebs, Heinrich Simon