Patents Assigned to Vacuumschmelze GmbH
  • Patent number: 7432790
    Abstract: The invention relates to a superconductor assembly comprising a metallic superconductor and a ceramic superconductor, which are mechanically and electrically interconnected to form a one-piece hybrid superconductor.
    Type: Grant
    Filed: March 19, 2002
    Date of Patent: October 7, 2008
    Assignee: Vacuumschmelze GmbH & Co KG
    Inventors: Thomas J. Arndt, Bernhard Fischer, Martin Munz, Andreas Szulczyk, Manfred Thoner
  • Patent number: 7400131
    Abstract: A current sensor comprises a magnetic module, whereby a primary conductor, a compensating winding and a magnetic field probe are magnetically coupled to each other. The primary conductor carries a current to be measured, with a driving circuit, for producing a triangular current, injected into the compensating winding. An evaluation circuit switches the output signal thereof from a first to a second output level and vice versa by a zero crossing of a signal, provided by the magnetic field probe, whereby the output signal is pulse-width modulated, depending on the intensity of the current to be measured.
    Type: Grant
    Filed: October 30, 2006
    Date of Patent: July 15, 2008
    Assignee: Vacuumschmelze GmbH & Co. KG
    Inventor: Norbert Preusse
  • Publication number: 20080099106
    Abstract: Disclosed are soft magnetic alloys that consist essentially of 10% by weight?Co?22% by weight, 0% by weight?V?4% by weight, 1.5% by weight?Cr?5% by weight, 1% by weight?Mn?2% by weight, 0% by weight?Mo?1% by weight, 0.5% by weight?Si?1.5% by weight, 0.1% by weight?Al?1.0% by weight, rest iron. Also disclosed are methods of making the alloys, and products containing them, such as actuator systems, electric motors, and the like.
    Type: Application
    Filed: July 27, 2007
    Publication date: May 1, 2008
    Applicant: Vacuumschmelze GmbH & Co. KG
    Inventors: Witold Pieper, Joachim Gerster
  • Publication number: 20080088451
    Abstract: Disclosed are markers for a magnetic theft protection system, which markers contain at least one oblong alarm strip made of an amorphous ferromagnetic alloy and at least one activation strip made of a molybdenum-free semi-hard magnetic alloy consisting essentially of NiaMbFeRest, wherein M is one or more of the elements from the group including Cr, W and V, and wherein a and b are weight percentages such that 15% by weight?a?25% by weight, and 2% by weight?b?8% by weight. The activation strip has a coercive force Hc of 10 A/cm to 25 A/cm and a remanence Br of at least 0.
    Type: Application
    Filed: September 7, 2007
    Publication date: April 17, 2008
    Applicant: Vacuumschmelze GmbH & Co. KG
    Inventors: Ottmar Roth, Hartwin Weber
  • Patent number: 7358716
    Abstract: A measuring method for measuring currents with a large dynamic range by means of a magnetic measuring module has the steps of switching into a high-current mode when a current threshold value is exceeded, and switching into a low-current mode otherwise, wherein the low-current mode has the following steps:—Feeding a first current pulse to a compensation coil, which drives a magnetic core in a first direction until magnetic saturation occurs,—measuring a first primary current value I1 after the current pulse is disconnected,—feeding a second current pulse to the compensation coil, which drives the magnetic core in a counter second direction until magnetic saturation occurs,—measuring a second primary current value I2 after the second current pulse is disconnected,—determining the corrected primary current value subsequently as an average value I=(I1+I2)/2 from the first and the second primary current values.
    Type: Grant
    Filed: January 12, 2006
    Date of Patent: April 15, 2008
    Assignee: Vacuumschmelze GmbH & Co. KG
    Inventors: Norbert Preusse, Stefan Schaefer, Friedrich Lenhard
  • Patent number: 7358844
    Abstract: A current transformer core has a ratio of the core outside diameter Da to the core inside diameter Di of <1.5, a saturation magnetostriction ?s of =|4| ppm, a circular hysteresis loop with 0.50=Br/Bs=0.85 and an Hcmax=20 mA/cm. The current transformer core is made of a soft magnetic iron alloy in which at least 50% of the alloy structure is occupied by fine-crystalline particles with an average particle size of 100 nm or less, and the iron-based alloy comprises, in essence, one combination.
    Type: Grant
    Filed: November 17, 2006
    Date of Patent: April 15, 2008
    Assignee: Vacuumschmelze GmbH & Co. KG
    Inventors: Wulf Guenther, Detlef Otte, Joerg Petzold
  • Publication number: 20080084308
    Abstract: Disclosed are a marker for a magnetic theft protection system, comprising: (a) at least one oblong alarm strip comprising an amorphous ferromagnetic alloy; and (b) at least one oblong activation strip comprising an alloy consisting essentially of formula NiaMobXcFeRest, wherein X is one or more of the elements from the group including Cr, W and V, and wherein a, b, and c are weight percentages, such that 15% by weight?a?25% by weight, 0% by weight?b?2.8% by weight, 0% by weight?c?8% by weight; and, wherein said activation strip has a coercitive force Hc of 10 A/cm to 25 A/cm and a remanence Br of at least 1.0 T; the activation strip itself, a tag containing the activation strip and/or marker, articles containing the marker or tag, methods for making the activation strip, and methods for making the marker.
    Type: Application
    Filed: October 1, 2007
    Publication date: April 10, 2008
    Applicant: Vacuumschmelze GmbH & Co. KG
    Inventors: Ottmar Roth, Hartwin Weber
  • Publication number: 20080063903
    Abstract: Disclosed are a braze, such as a braze in the form of an amorphous, ductile brazing foil, having a composition consisting essentially of FeaNirestSibBcMd with 5 atomic percent?a?35 atomic percent, 1 atomic percent?b?15 atomic percent, 5 atomic percent<c?15 atomic percent, 0?d?4 atomic percent, rest Ni and incidental impurities, wherein M is one or more of the elements Co, Cr, Mn, Nb, Mo, Ta, Cu, Ag, Pd or C, and having a liquidus temperature TL?1025° C. Also disclosed are apparatus containing parts joined by said braze, methods for using said braze, and methods for making said amorphous, ductile brazing foil.
    Type: Application
    Filed: September 13, 2007
    Publication date: March 13, 2008
    Applicant: Vacuumschmelze GmbH & Co. KG
    Inventors: Dieter Nuetzel, Thomas Hartmann
  • Publication number: 20080042505
    Abstract: The invention relates to a method for the production of a soft magnetic core for generators and generator with a core of this type. To produce a core, a plurality of magnetically activated and/or magnetically activatable textured laminations is produced from a CoFeV alloy. This plurality of laminations is then stacked to form a core assembly. Then the core assembly, if consisting of magnetically activatable laminations, is magnetically activated. Finally, the magnetically activated core assembly is eroded to produce a soft magnetic core. A core of this type is suitable for a generator with a stator and a rotor for high-speed aviation turbines, the laminations in the core assembly being oriented in different texture directions relative to one another.
    Type: Application
    Filed: July 18, 2006
    Publication date: February 21, 2008
    Applicant: Vacuumschmelze GMBH & Co. KG
    Inventors: Joachim Gerster, Witold Pieper, Rudi Ansmann, Michael Koehler, Michael Von Pyschow
  • Patent number: 7276128
    Abstract: A ferromagnetic resonator for use in a marker in a magnetomechanical electronic article surveillance system is manufactured at reduced cost by being continuously annealed with a tensile stress applied along the ribbon axis and by providing an amorphous magnetic alloy containing iron, cobalt and nickel and in which the portion of cobalt is less than about 4 at %.
    Type: Grant
    Filed: October 8, 2003
    Date of Patent: October 2, 2007
    Assignees: Vacuumschmelze GmbH, Sensormatic Electronics Corp.
    Inventors: Giselher Herzer, Nen-Chin Liu
  • Patent number: 7265651
    Abstract: The invention relates to an inductive component (10) whose soft magnetic core (11) is produced by pouring a casting resin into a mold (1a) filled with a soft magnetic alloy powder and by subsequently hardening the casting resin with the alloy powder in order to form a solid soft magnetic core. Contrary to conventional injection molding methods, this technique prevents the surface insulation of the alloy particles from becoming damaged so that the formation of bulk eddy currents in the resulting soft magnetic cores can be prevented to a large extent. This enables a distinct reduction in the electric loss of the inductive component.
    Type: Grant
    Filed: April 5, 2001
    Date of Patent: September 4, 2007
    Assignee: Vacuumschmelze GmbH & Co. KG
    Inventor: Markus Brunner
  • Patent number: 7230514
    Abstract: Inductive component (10; 20; 30) having at least one coil (12; 22; 32) and a magnetically soft core (11; 21; 31) made from a ferromagnetic powder composite in which the ferromagnetic powder composite shows an alloy powder mixture made from alloy powders having formanisotropic as well as formisotropic powder particles and a casting resin.
    Type: Grant
    Filed: November 13, 2002
    Date of Patent: June 12, 2007
    Assignee: Vacuumschmelze GmbH & Co KG
    Inventor: Markus Brunner
  • Patent number: 7230211
    Abstract: An electric heating element is provided with a durable PTC resistance made at least partially of an iron-based alloy, exhibiting stable characteristics to a temperature of 1500 DEG C. and having a resistance/temperature characteristic curve which substantially increases in a linear manner within a temperature range between an ambient temperature and 1500 DEG C. and can be used for a temperature control. The PCT resistance is provided with an oxidation resistant metallization or is gas-tightly enveloped by a jacket (2, 3, 12), a space between the jacket (2, 3, 12) and the PCT resistance (1,13) being filled with a powder or granules (14) which remove an important gas amount from the space.
    Type: Grant
    Filed: September 26, 2005
    Date of Patent: June 12, 2007
    Assignee: Vacuumschmelze GmbH & Co. KG
    Inventors: Hartwin Weber, Waldemar Doering
  • Patent number: 7088247
    Abstract: A ferromagnetic resonator for use in a marker in a magnetomechanical electronic article surveillance system is manufactured at reduced cost by being continuously annealed with a tensile stress applied along the ribbon axis and by providing an amorphous magnetic alloy containing iron, cobalt and nickel and in which the portion of cobalt is less than about 4 at %.
    Type: Grant
    Filed: October 8, 2003
    Date of Patent: August 8, 2006
    Assignees: Vacuumschmelze GmbH, Sensormatic Electronics Corp.
    Inventors: Giselher Herzer, Nen-Chin Liu
  • Patent number: 7057485
    Abstract: Addressed is a current transformer comprising a primary conductor, a secondary winding and a soft-magnetic core, whereby the primary conductor and secondary winding are electrically insulated from one another and are magnetically intercoupled via the core. In addition, a current to be detected is injected into the primary conductor, and a compensating current is injected into the secondary winding. An additional conductor is provided which is electrically connected in parallel to the primary winding, and which is situated in the area of the core at which a flux rise occurs, whereby the flux rise is at least partially compensated for by the flux elicited by the current flowing in the additional conductor.
    Type: Grant
    Filed: March 5, 2001
    Date of Patent: June 6, 2006
    Assignee: Vacuumschmelze GmbH & Co. KG
    Inventors: Norbert Preusse, Friedrich Lenhard, Stefan Schäfer
  • Patent number: 7042310
    Abstract: The invention relates to a high-pass branch (7) of a frequency separating filter for ADSL systems comprising inductive components (11, 14) which dispose of magnet cores made of a soft magnetic amorphous or nanocrystalline. As a result, frequency separating filters are provided which comprise small structural shapes and which have especially beneficial properties in the relevant frequency and temperature range.
    Type: Grant
    Filed: June 8, 2000
    Date of Patent: May 9, 2006
    Assignee: Vacuumschmelze GmbH
    Inventors: Joerg Petzold, Johannes Beichler, Dirk Heumann
  • Patent number: 7026938
    Abstract: A ferromagnetic element for use in a marker in a magnetomechanical electronic article surveillance system has improved magnetoresonant properties and/or reduced eddy current losses by virtue of having a fine domain structure having a maximum width of 1.5 times the thickness of the element and oriented transverse to the element axis, and an induced magnetic easy axis substantially perpendicular to the element axis, and having a hysteresis loop that is linear up to a magnetic field substantially equal to a magnetic field that ferromagnetically saturates the ferromagnetic element.
    Type: Grant
    Filed: April 23, 2004
    Date of Patent: April 11, 2006
    Assignee: Vacuumschmelze GmbH
    Inventor: Giselher Herzer
  • Patent number: 6960912
    Abstract: In a magnetic sensor device, a positioning element is provided with receptacles for receiving one magnetic field sensor element each. The positioning element and the magnetic field sensor elements are manufactured in a way that they fit exactly together so that the positioning element exactly positions the sensor elements with respect to each other. The magnetic field sensor elements may be manufactured separately before they are put together to build the magnetic field sensor device.
    Type: Grant
    Filed: May 12, 2003
    Date of Patent: November 1, 2005
    Assignee: Vacuumschmelze GmbH & Co. KG
    Inventors: Johannes Beichler, Michael Engelstaedter, Michael Friedrichs, Claude Goethals, Achim Kipper, Markus Settegast
  • Patent number: 6926777
    Abstract: The invention relates to a method for producing rod-shaped permanent magnets according to which pressed parts (2) are produced that are then assembled to a rod-shaped green product. Said green product is subsequently sintered, whereby a rod-shaped single-piece permanent magnet (1) is produced.
    Type: Grant
    Filed: December 19, 2000
    Date of Patent: August 9, 2005
    Assignee: Vacuumschmelze GmbH & Co. KG
    Inventors: Georg Werner Reppel, Volker Zellmann
  • Patent number: 6873077
    Abstract: Cup-shaped magnet for electric motors having two face surfaces, two lateral surface, and two top surfaces, which are curving between the face surfaces along the lateral surfaces, whereby the lateral faces are chamfered in a v-shape.
    Type: Grant
    Filed: September 23, 2002
    Date of Patent: March 29, 2005
    Assignee: Vacuumschmelze GmbH & Co. KG
    Inventor: Frank Jurisch