Patents Assigned to Heraeus GmbH
  • Auxiliary-voltage source for supplying electric circuits which are at a high potential
    Patent number: 4525652
    Abstract: In an auxiliary-voltage DC source for supplying an electric circuit and, more particularly, one at a high potential in an electron gun without an isolation transformer, the primary winding of a current transformer is located in an alternating-current section of the electric circuit. The current transformer has at least one secondary winding which is connected through a rectifier to a parallel regulator for providing the auxiliary-voltage.
    Type: Grant
    Filed: October 21, 1983
    Date of Patent: June 25, 1985
    Assignee: Leybold-Heraeus GmbH
    Inventors: Wolfgang Sperzel, Johann Sturmer
  • Oil-sealed vacuum pump
    Patent number: 4525129
    Abstract: An oil-sealed vacuum pump comprises an oil circuit for supplying a pump chamber and bearings of the vacuum pump with oil. The oil circuit includes first and second branch conduits leading to the bearings and the pump chamber, respectively. The vacuum pump further has an oil pump coupled to the oil circuit for driving oil therethrough, a valve assembly coupled to the oil circuit for shutting off oil supply to the pump chamber during standstill of the vacuum pump, and a pressure reducer coupled to the oil circuit for reducing the oil pressure to environmental pressure. The first branch conduit leading to the bearings is situated upstream of, and the second branch conduit leading to the pump chamber and the valve assembly are situated downstream of the pressure reducer as viewed in the direction of oil flow in the oil circuit.
    Type: Grant
    Filed: December 16, 1982
    Date of Patent: June 25, 1985
    Assignee: Leybold-Heraeus GmbH
    Inventors: Hanns-Peter Berges, Peter Frieden, Wolfgang Leier
  • Device for manufacturing powder by dividing a melt
    Patent number: 4522577
    Abstract: A device for manufacturing powder from a melt by a mechanism for dividing it up. The device has a vertical shaft and a powder outtake that communicates with the shaft. To achieve the objectives of reducing the overall height of such a device and preventing the powder from sintering, the powder outtake consists of the lower section of the shaft and has essentially the same cross-section as the upper section. Both sections, together, essentially determine the overall height of the device. Both sections are connected with a releasable connecting element and can be separated from each other in a direction perpendicular to the axis of the shaft.
    Type: Grant
    Filed: July 1, 1983
    Date of Patent: June 11, 1985
    Assignee: Leybold-Heraeus GmbH
    Inventor: Rolf Ruthardt
  • Apparatus for producing a microwave plasma for the treatment of substrates, in particular for the plasma-polymerization of monomers thereon
    Patent number: 4521717
    Abstract: The invention relates to apparatus for producing a microwave plasma for the treatment of substrates, and in particular for the plasma polymerization of monomers for coating substrates. The apparatus consists of a reaction chamber with a carrier for conveying the substrates and a way for maintaining an atmosphere of ionizable gases and monomers. The apparatus also has a first and at least one second wave-guide structure which are arranged at opposite acute setting angles to the surface of the substrate carrier and are each connected at one end to a microwave transmitter by way of a hollow conductor. Thus, the treatment intensities, i.e. the rates of deposition, are superposed, and this leads to greater uniformity in the properties of the product. The apparatus may also include angling the wave-guide structures toward each other and staggering crossbar structures in the wave-guides for further improvement.
    Type: Grant
    Filed: November 29, 1982
    Date of Patent: June 4, 1985
    Assignee: Leybold-Heraeus GmbH
    Inventor: Jorg Kieser
  • Low-contamination AlN crucible for monocrystal pulling and method
    Patent number: 4519966
    Abstract: A low contamination crucible for pulling monocrystals of Group III and Group V elements of the Periodic Table, comprising particularly aluminum nitride with an additive of boron nitride or a rare earth oxide. The additive concentration is up to 5% by weight, but preferably 0.5% to 3% by weight. The hardness of the crucible of the invention is 300 to 400% greater than that of undoped material subjected to the same sintering conditions.
    Type: Grant
    Filed: December 20, 1983
    Date of Patent: May 28, 1985
    Assignee: W. C. Heraeus GmbH
    Inventors: Fritz Aldinger, Richard Keilberth, Waltraud Werdecker
  • Method and apparatus for short-path distillation
    Patent number: 4517057
    Abstract: In a method and apparatus for short-path, high-vacuum distillation from a liquid on plate-like evaporating surfaces from which distillable fractions evaporate and precipitate onto condensation surfaces a short distance away, the liquid is placed upon the evaporating surfaces at a temperature such that the energy required for its evaporation is taken, at least in part, from the still-unevaporated fraction of the liquid.
    Type: Grant
    Filed: June 4, 1982
    Date of Patent: May 14, 1985
    Assignee: Leybold-Heraeus GmbH
    Inventors: Friedrich Fauser, Willi Fischer
  • Magnetron cathode for cathodic evaportion apparatus
    Patent number: 4515675
    Abstract: A magnetron cathode for cathodic evaporation apparatus with a target holder (10) for releasably securing a plate-like target (9). The associated magnet arrangement (7) has pole faces (7c, 7d) for producing at least one circumferentially closed tunnel of magnetic field lines which overlaps the target. The magnet arrangement (7) is accommodated in a housing of non-ferromagnetic material which extends over the pole faces.
    Type: Grant
    Filed: June 27, 1984
    Date of Patent: May 7, 1985
    Assignee: Leybold-Heraeus GmbH
    Inventors: Jorg Kieser, Reiner Kukla, Gerd Deppisch
  • Sliding contact arrangement for transmitting heavy currents from and to bus bars with slide surfaces
    Patent number: 4509807
    Abstract: A sliding contact arrangement for transmitting heavy currents to and from a bus bar has a cage with conductive contact faces and an arrangement to cause a conductive sliding contact to bear on the bus bar and only one of the contact faces.
    Type: Grant
    Filed: August 27, 1982
    Date of Patent: April 9, 1985
    Assignee: Leybold Heraeus GmbH
    Inventors: Uwe Reimpell, Otto Stenzel
  • Mass spectrometer
    Patent number: 4506227
    Abstract: A resonant-circuit, high-frequency electrical power supply for a mass spectrometer has a transductor for magnetically retuning the power supply in response to tuning variations produced by operating variations in the mass spectrometer.
    Type: Grant
    Filed: May 20, 1982
    Date of Patent: March 19, 1985
    Assignee: Leybold Heraeus GmbH
    Inventors: Raymond Heinen, Horst Stelling
  • Rotatable heavy-current connector
    Patent number: 4492423
    Abstract: A rotatable connector for heavy electric currents has a first annular flange unit coaxially in the annular space of a second annular flange unit. Inner and outer fluid-cooled conductors physically and electrically connect to the first flange unit. The conductors and first flange unit are rotatable relative to the second flange unit about the axis of the flange units. U-shaped stranded wires are embedded at their opposite ends in corresponding first and second flanges of the first and second flange units. The first flange of the first flange unit is cooled by the fluid cooling the outer conductor and the other flanges of the units are separately fluid cooled. The combination of embedding the stranded wires in the flanges and fluid cooling the flanges keeps the stranded wires cool enough for carrying heavy electric currents without corroding contact of the stranded wires with the cooling fluid.
    Type: Grant
    Filed: May 25, 1983
    Date of Patent: January 8, 1985
    Assignee: Leybold-Heraeus GmbH
    Inventor: Wolfgang Reuter
  • Thermal conductivity vacuum gage
    Patent number: 4492123
    Abstract: A thermal conductivity vacuum gage has a vacuum-sensing probe and a separate operating unit for indicating the vacuum sensed by the probe and supplying electrical power for the vacuum sensing by the probe. An electrically-conducting cable connects the probe to the operating unit to form measuring and power supply circuits therebetween. The portion of the measuring circuit and the portion of the power supply circuit in the operating unit are identical or common, i.e. the same circuit portion, so that variations in the operation of this common circuit portion affect circuits the same in contrast to prior gages having separate measuring and power supply circuits, whereby variations in the operation of one could affect the other.
    Type: Grant
    Filed: March 31, 1982
    Date of Patent: January 8, 1985
    Assignee: Leybold-Heraeus GmbH
    Inventor: Gunther Reich
  • Galvanic depositing of palladium coatings
    Patent number: 4491507
    Abstract: Bright palladium coatings which are pore-free and free of fissures and have a low internal stress are produced by galvanic depositing from a bath which contains tetrammine palladium dibromide, ammonium bromide, sulfamic acid and/or ammonium sulfamate and nicotinic acid and/or nicotinamide.
    Type: Grant
    Filed: May 9, 1984
    Date of Patent: January 1, 1985
    Assignee: W. C. Heraeus GmbH
    Inventors: Gunter Herklotz, Gerhard Arnold
  • High-power cathode system for producing multilayers
    Patent number: 4488956
    Abstract: High-power cathode system for producing multilayers of different target materials on a substrate has at least two different target materials which abut one another at a boundary line in the field of a magnetic field generator thereof. The substrate is transported for coating across the boundary line, preferably perpendicularly.
    Type: Grant
    Filed: December 22, 1983
    Date of Patent: December 18, 1984
    Assignees: Leybold-Heraeus GmbH, Glyco-Metal Werke
    Inventors: Michael Scherer, Karl-Heinz Kubacha
  • Clamp for joining together a pair of flanges
    Patent number: 4488744
    Abstract: A clamp for joining a pair of flanges has a clamp chain with grooved clamp shoes thereon which, in the closed position of the clamp, straddle the edges of the flanges to press them together. At least some of the clamp shoes are fastened to the clamp chain through an intermediate member which pivots at both the clamp chain and the clamp shoe.
    Type: Grant
    Filed: December 7, 1981
    Date of Patent: December 18, 1984
    Assignee: Leybold-Heraeus GmbH
    Inventors: Friedrich Bubeck, Uwe Reimpell
  • Apparatus for manufacturing powder by dividing a melt
    Patent number: 4488859
    Abstract: An arrangement for manufacturing powder from a melt by a mechanism for dividing it up. The device has a vertical shaft and a powder outtake that communicates with the shaft through a funnel-shaped housing component. To achieve the objectives of reducing the overall height of such a device and preventing the powder from sintering, the axis of the housing component is perpendicular to the axis of the shaft, and the shaft tilts in a bearing until the axis of the housing component is horizontal.
    Type: Grant
    Filed: June 9, 1983
    Date of Patent: December 18, 1984
    Assignee: Leybold-Heraeus GmbH
    Inventor: Rolf Ruthardt
  • Vacuum pump and method of operating the same
    Patent number: 4483667
    Abstract: A vacuum pump comprises a suction nipple valve including a cylinder, a piston slidably received therein and a movable valve closing member operatively connected to the piston. The vacuum pump further has a pressure medium conduit having a first end communicating with the cylinder; an inlet opening at a second end of the conduit for pressure medium to flow through the inlet opening to the piston; a control arrangement for closing and opening the inlet opening dependent upon run or standstill of the vacuum pump. In the closed state of the inlet opening an oil quantity is maintained above the inlet opening.
    Type: Grant
    Filed: December 16, 1982
    Date of Patent: November 20, 1984
    Assignee: Leybold-Heraeus GmbH
    Inventors: Hanns-Peter Berges, Peter Frieden, Hans-Peter Kabelitz
  • Energy-beam welding machine
    Patent number: 4482796
    Abstract: An energy-beam welding machine has a vacuum chamber consisting of upper and lower parts. For receiving workpieces of various heights, the lower part of the chamber can be lowered to a position below a conveying plane in which the workpieces can be advanced and a lifting column which carries a workpiece-receiving device at its upper end is movable in the vertical direction relative to the lower part of the chamber. The extent of the relative movement can be varied by a displaceable stop between the lifting column and the lower part of the chamber so that, even when the vertical dimensions of the workpieces differ, the position of the welded seams is always in the same plane, and the lower faces of the workpieces can also always be introduced laterally into the lower part of the chamber from the conveying plane.
    Type: Grant
    Filed: August 19, 1982
    Date of Patent: November 13, 1984
    Assignee: Leybold-Heraeus GmbH
    Inventor: Klaus Weissmann
  • Cryopump
    Patent number: 4479360
    Abstract: A cryopump having two refrigerator stages operable for producing progressively lower temperatures and at least one surface between the refrigerator stages and in such thermal communication therewith as to have, during operation of the refrigerator stages, temperatures which adsorb and desorb thereon at least one gas in the cryopump, having the improvement comprising:shield means extending over substantially all of the surface for substantially preventing the gas from circulating to the surface; andmeans for maintaining the shield means at a substantially constant temperature during operation of the refrigerator stages.
    Type: Grant
    Filed: December 6, 1982
    Date of Patent: October 30, 1984
    Assignee: Leybold-Heraeus GmbH
    Inventors: Werner B/a/ chler, Rolf Heisig
  • Refrigerator with pneumatic and working gas-supply control
    Patent number: 4475345
    Abstract: A refrigerator has a cold producer with a pneumatically-operated displacer for displacing a working, cold-producing gas. The pneumatic and working gas-supply control is separate from the cold producer and connected thereto by tubes having volumes less than the maximum volumes of the portions of the chamber supplied thereby.
    Type: Grant
    Filed: July 23, 1982
    Date of Patent: October 9, 1984
    Assignee: Leybold-Heraeus GmbH
    Inventors: Hans-Joachim Forth, Rolf Heisig
  • Vacuum pump with overload protection valve
    Patent number: 4470767
    Abstract: In a vacuum pump having a housing presenting a suction side and a pressure side, a connecting line connected between the suction side and the pressure side and a weighted valve mounted in the connecting line and having a part which is movable to open the valve in order to place the suction and pressure sides in communication when a maximum permissible pressure difference between the suction and vacuum sides is exceeded, the valve is mounted so that the axis of movement of the valve part forms an angle of 45.degree. with the direction of the pumping action between the suction and pressure sides, whereby the weighted valve will function properly with the pump oriented to produce its pumping action in either the vertical or the horizontal direction.
    Type: Grant
    Filed: October 9, 1979
    Date of Patent: September 11, 1984
    Assignee: Leybold-Heraeus GmbH
    Inventors: Heinz Frings, Karl-Heinz Ronthaler