Patents by Inventor Uwe Hartmann

Uwe Hartmann has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5188434
    Abstract: A brake-pressure controller regulates the brake pressure on the individual wheels according to the instantaneous slip values in comparison with variable desired slip values. The angle of inclination of one wheel of each axle is determined, and the desired slip values are varied as a function of these angles of inclination with the effect of a better vehicle controllability.
    Type: Grant
    Filed: June 3, 1991
    Date of Patent: February 23, 1993
    Assignee: Robert Bosch GmbH
    Inventors: Wolf-Dieter Ruf, Uwe Hartmann, Friedrich Kost, Anton Van Zanten
  • Patent number: 5178742
    Abstract: A micromelt structure is provided on a probe tip by contacting the probe tip with a foil of the material from which the micromelt structure is to be formed and passing an electric current through the contact point to melt the foil and cause the molten foil material to collect on the tip of the probe where, by surface tension, it is drawn into a microsphere shape and homogeneously solidifies. The probe with the micromelt tip is highly reproducible and uniform and is particularly effective for use as a probe in scanning microscopy.
    Type: Grant
    Filed: March 7, 1991
    Date of Patent: January 12, 1993
    Assignee: Forschungszentrum Julich GmbH
    Inventors: Heiko Lemke, Thomas Goddenhenrich, Hans-Peter Bochem, Uwe Hartmann
  • Patent number: 5149853
    Abstract: In a process for the production of thin films and epitaxial layers by gas-phase deposition, intramolecularly stabilized organometallic compounds are employed as a source of metal.
    Type: Grant
    Filed: November 8, 1991
    Date of Patent: September 22, 1992
    Assignee: Merck Patent Gesellschaft mit beschraenkter Haftung
    Inventors: Dietrich Erdmann, Max E. Van Ghemen, Ludwig Pohl, Herbert Schumann, Uwe Hartmann, Wilfried Wassermann, Meino Heyen, Holger Jurgensen
  • Patent number: 5145564
    Abstract: Probe tips are produced from electrically conductive wire by electrolytic machining of a zone of the wire above a free end utilizing a liquid electrolyte layer in contact with this zone, a ring electrode surrounding this zone, and a layer of an insulating fluid into which the free end extends. The insulating fluid can be air where the electrolyte is a membrane between layers of air above and below the membrane, or a body of a liquid insulator below the electrolyte layer where the insulator and the electrolyte form a bath.
    Type: Grant
    Filed: March 7, 1991
    Date of Patent: September 8, 1992
    Assignee: Forschungszentrum Julich GmbH
    Inventors: Heiko Lemke, Thomas Goddenhenrich, Hans-Peter Bochem, Uwe Hartmann
  • Patent number: 5113839
    Abstract: The ignition system consists of a free-running ignition final stage, a miniature induction coil, a static and/or dynamic determination of the ignition angle, and a power supply. The ignition final stage ensures that the ignition current is an alternating current and that the ignition energy is fed to the spark plugs in a current-controlled manner. The ignition point is determined by reading the ignition angle. The electrical supply to the entire ignition final stage and additional consumers in a motor vehicle is through a power supply that converts the current and voltage.
    Type: Grant
    Filed: August 29, 1990
    Date of Patent: May 19, 1992
    Assignee: Vogt Electronic AG
    Inventors: Uwe Hartmann, Udo Mai, Roman Schichl
  • Patent number: 5112432
    Abstract: In a process for the production of thin films and epitaxial layers by gas-phase deposition, intramolecularly stabilized organometallic compounds are employed as a source of metal.
    Type: Grant
    Filed: August 3, 1989
    Date of Patent: May 12, 1992
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Dietrich Erdmann, Max E. Van Ghemen, Ludwig Pohl, Herbert Schumann, Uwe Hartmann, Wilfried Wassermann, Meino Heyen, Holger Jurgensen
  • Patent number: 5093755
    Abstract: A circuit for demagnetizing a mask in a color picture tube of a television receiver, in which a resistor with positive temperature coefficient is applied to the input alternating current when the receiver is turned on. A bridge rectifier is connected with one terminal, to a first pole of the alternating current source, via the demagnetizing coil that is mounted on the picture tube, and the resistor. The bridge rectifier has another terminal connected to a second pole of the alternating current source. A variable electronic switch interconnects the direct-current output terminals of the bridge rectifier. The variable electronic switch is controlled to continuously decrease current flowing through the demagnetizing coil to zero. For this purpose, a controlling voltage is obtained from a winding in a horizontal-frequency synchronized power-intake stage by flyback rectification.
    Type: Grant
    Filed: July 11, 1989
    Date of Patent: March 3, 1992
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventors: Uwe Hartmann, Eduard Lohmuller, Fritz Ohnemus
  • Patent number: 5077501
    Abstract: A circuit for correcting geometrical distortions in reproducing signals on a screen of a cathode-ray tube in a display monitor. A line-frequency correction current having line deflection frequency is coupled into the vertical deflection unit which serves for deflecting vertically electron beams in the cathode-ray tube. A circuit which provides horizontal deflection current is connected to the primary winding of a differential transformer. The differential transformer has a secondary winding connected to the circuit which supplies vertical deflection current. The distortion is reflected by a cathode-ray tube which has a substantially flat picture screen, in which horizontal lines to be displayed form in angle with a horizontal reference grid.
    Type: Grant
    Filed: August 24, 1988
    Date of Patent: December 31, 1991
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventors: Uwe Hartmann, Franz Dieterle, Fritz Ohnemus
  • Patent number: 5015960
    Abstract: A method for generating a voltage with a triangular waveform which is independent of frequency. Two oppositely-phased voltages with sawtooth waveforms are added together in an adding circuit. These two waveforms have different amplitudes, and one of the waveforms has a horizontal section during predetermined intervals of a period. The resulting triangular waveform has points at which the waveform passes through zero, and these points coincide with the points at which the sawtooth waveforms pass through zero also. These points at which the waveforms pass through zero corresponds to 0.degree., 180.degree., and 360.degree. of a waveform cycle for eliminating substantially gullwing errors in television sets. These points correspond to the beginning, center and end of lines in the television sets.
    Type: Grant
    Filed: April 28, 1989
    Date of Patent: May 14, 1991
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventors: Uwe Hartmann, Fritz Ohnemus
  • Patent number: 5015915
    Abstract: An arrangement for compensating against the magnetic field of the earth in a picture tube in remote-controlled video-display equipment, in which a compensating voltage is generated by a remote-control channel in the video-display equipment. This voltage is applied to a compensation coil in the picture tube. Current through the coil is adjusted in finely-divided incremental steps, and the current is continuously adjustable. The compensation voltage is applied to one end of the compensation coil, whereas the other end of the coil is supplied with substantially half of the operating voltage of the display equipment.
    Type: Grant
    Filed: September 1, 1989
    Date of Patent: May 14, 1991
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventors: Uwe Hartmann, Udo Mai
  • Patent number: 5015747
    Abstract: The invention relates to organometallic compounds which are stabilized intramolecularly and have a cyclic or bicyclic structure and to the use thereof for the preparation of thin films and epitaxial layers by gas phase deposition.
    Type: Grant
    Filed: April 7, 1989
    Date of Patent: May 14, 1991
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Martin Hostalek, Ludwig Pohl, Dietrich Erdmann, Herbert Schumann, Uwe Hartmann, Meino Heyen, Holger Jurgensen
  • Patent number: 4992872
    Abstract: A process for synchronizing horizontal deflection of electron beams in television recievers having a reproduced picture with a visible component, when no transmission signals from a television transmitter are present. If an emitted signal is not available, the synchronization is suspended during the time of the visible picture trace, and is activated only during the picture blanking time. For this purpose, the procedure is to switch off a circuit that synchronizes horizontal deflection during the visible component of the reproduced picture. A synchronization circuit is activated only while the picture is being blanked.
    Type: Grant
    Filed: February 19, 1988
    Date of Patent: February 12, 1991
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventors: Uwe Hartmann, Udo Mai, Fritz Ohnemus
  • Patent number: 4987350
    Abstract: A video-display unit in which the beam current of a cathode-ray tube is measured for a predetermined time interval during display of some lines exterior to an image, for establishing automatic cutoff for the electronic beam. This electron beam is defocused during that predetermined time interval, and the defocusing is independent of the contents of the image, so that initial lines are substantially invisible. An electronic switch may be provided for decreasing the focusing voltage of the cathode ray tube. The electronic switch may be a high-vacuum tube connected to the focusing electrode of the cathode-ray tube, or this switch may be a transistor connected through a transformer to the focusing electrode. The transformer may be attenuated.
    Type: Grant
    Filed: September 1, 1989
    Date of Patent: January 22, 1991
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventors: Uwe Hartmann, Fritz Ohnemus
  • Patent number: 4973039
    Abstract: In a conveyor system, a retarder device (1) with a braking gap (40) for the passage of sheet stacks (4) collated with an overlap and regulated by a controller (35) via an actuator (33), the width of the braking gap (40) being positively adjusted, with the slight undersize necessary to generate the braking load, to the current stack height of the section of the stack stream (6) passing the braking gap (40). In this way the braking pressure acting on the stack sheets (4) can be kept substantially constant independently of the stack height. The braking pressure may also be adapted to the sensitivity of the sheet stacks (4) by a braking pressure relief unit in the form of a load relief element (42).
    Type: Grant
    Filed: April 5, 1989
    Date of Patent: November 27, 1990
    Assignee: bielomatik Leuze GmbH & Co.
    Inventors: Erwin Jeske, Walter Schaich, Uwe Hartmann
  • Patent number: 4973930
    Abstract: A coil arrangement comprising two coils on a single coil former, termed a twin coil, is characterized in that the two coils (W1, W2 and, respectively, W3A), with any respective individual magnetic core (10 or, respectively, 9) required, are mounted with a substantial distance from each other on the coil former (1) and in that the respective residual coupling of the coils (W1, W2 and W3A) is eliminated by an oppositely wound or connected compensation winding (W3B). The compensating winding (8) is located in the one winding compartment (3) and has current from the coil in the other winding chamber (4) flowing through it. As a result the twin coil in accordance with the invention leads to some advantages over known twin coils in which the coupling between the two coils is nearly 100%.
    Type: Grant
    Filed: July 12, 1989
    Date of Patent: November 27, 1990
    Assignee: Vogt Electronic Aktiengesellschaft
    Inventors: Udo Mai, Uwe Hartmann
  • Patent number: 4968920
    Abstract: Picture tubes with an extremely flat screen exhibit peculiar geometrical distortions in that the beginning and end of the lines in the picture bend symmetrical to the midline as the result of the magnetic deflection field typical of that type of tube.These distortions, called "bending errors," are eliminated in accordance with the invention by coupling another current into the vertical-deflection winding. A current that increases until the horizontal flyback begins is generated 5 to 10 microseconds before the electron beam ends its horizontal forward sweep and an additional current that decreases for 5 to 10 microseconds during the horizontal forward sweep is generated at the end of the horizontal flyback.Eliminating geometrical distortions on the screen of a picture tube.
    Type: Grant
    Filed: April 28, 1989
    Date of Patent: November 6, 1990
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventors: Uwe Hartmann, Fritz Ohnemus
  • Patent number: 4912617
    Abstract: A primary winding of a transformer is coupled to a source of input voltage and to a controllable switch. The switch is responsive to a first control signal for generating output pulses in the transformer secondary windings. A supply circuit is responsive to the output pusles and generates a first supply voltage. A capacitor charging circuit includes a thyristor that is coupled to one of the transformer secondary windings. The thyristor receives the output pulses for providing charging pulses to the capacitor for generating a second supply voltage. A control circuit is coupled to the thyristor for varying the number of output pulses occurring relative to a given number of charging pulses to regulate the second supply voltage.
    Type: Grant
    Filed: September 19, 1988
    Date of Patent: March 27, 1990
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventors: Uwe Hartmann, Udo Mai
  • Patent number: 4896214
    Abstract: A television receiver in which a microcomputer controls an operating part, and a clock generator for the microcomputer is synchronized by synchronization pulses in the television signal transmitted to the receiver. The clock generator is also in the form of a control generator for a switching network part and for the deflection stages of the television receiver. The signal from the clock generator is divided and processed by a pulse-width modulator. This pulse-width modulator emits a control signal for controlling the switching network part.
    Type: Grant
    Filed: October 17, 1988
    Date of Patent: January 23, 1990
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventors: Franz Dieterle, Erich Geiger, Uwe Hartmann, Udo Mai
  • Patent number: 4891707
    Abstract: A television receiver with a utility line-separated end and a controlled, line-separating, switched external power supply at the utility line end. Horizontal and vertical deflection currents are generated by horizontal and vertical output stages, and each of the two output stages are connected to a driving stage for the purpose of triggering the respective output stage. A modulator supplies a triggering signal to the driving stage and controls line separation. A horizontal frequency control signal and a vertical frequency control signal are generated and applied to horizontal and vertical sawtooth signal generators. The vertical output stage has one input connected to the horizontal sawtooth signal generator, and a second input connected to the vertical sawtooth signal generator through an error amplifier for vertical deflection of the end of the power supply connected to the utility line.
    Type: Grant
    Filed: April 4, 1988
    Date of Patent: January 2, 1990
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventors: Franz Dieterle, Uwe Hartmann, Udo Mai
  • Patent number: 4880492
    Abstract: In a process for the production of thin films and epitaxial layers by gas-phase deposition, intramolecularly stabilized organometallic compounds are employed as a source of metal.
    Type: Grant
    Filed: September 15, 1987
    Date of Patent: November 14, 1989
    Assignee: Merck Patent Gesellschaft Mit Beschrankter Haftung
    Inventors: Dietrich Erdmann, Max E. Van Ghemen, Ludwig Pohl, Herbert Schumann, Uwe Hartmann, Wilfried Wassermann, Meino Heyen, Holger Jurgensen