Patents by Inventor Dieter Leers

Dieter Leers 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: 7514871
    Abstract: The invention relates to a high-pressure gas-discharge lamp, having at least one gastight fused press-seal between a glasslike material and molybdenum, wherein the molybdenum in the fused press-seal is at least partly exposed to an oxidizing environment and at least that part of the molybdenum that is exposed to the oxidizing environment is covered with a coating, and the coating comprises at least one oxide from among Fe2O3, Ta2O5, Nb2O5, Al2O3, SiO2, TiO2, ZrO2, HfO2, and/or one nitride from among TiN, ZrN, HfN, AlN, BN, and/or one carbide from among TiC, ZrC, HfC, VC, NbC, TaC, B4C.
    Type: Grant
    Filed: September 23, 2003
    Date of Patent: April 7, 2009
    Assignee: Koninklijke Philips Electronics, N.V.
    Inventors: Robert Peter Scholl, Rainer Hilbig, Achim Gerhard Körber, Johannes Baier, Klaus Gawron, Dieter Leers
  • Patent number: 7291980
    Abstract: A high-pressure mercury vapor discharge lamp has an envelope which contains two electrodes made from tungsten and a filling in a discharge space. The filling essentially consists of mercury, rare gas, and a halogen that is free in the operating condition. The envelope further has a second space.
    Type: Grant
    Filed: February 27, 2004
    Date of Patent: November 6, 2007
    Assignee: Koninklijke Philips Electronics, N.V.
    Inventors: Hanns Ernst Fischer, Dieter Leers, Bernd Engelbrecht
  • Publication number: 20060152160
    Abstract: The invention relates to a high-pressure mercury vapor discharge lamp (1) with an envelope (2) made from high-temperature-resistant material, which contains two electrodes (12, 13) made from tungsten and a filling in a discharge space (14), which filling essentially consists of mercury, rare gas, and a halogen that is free in the operating condition. According to the invention, the envelope (2) has a second space (15, 16).
    Type: Application
    Filed: February 27, 2004
    Publication date: July 13, 2006
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: Hanns Fischer, Dieter Leers, Bernd Engelbrecht
  • Patent number: 6552499
    Abstract: A high-pressure gas discharge lamp (HID or UHP lamp, or in general lamps with mercury fillings of between approximately 0.05 and 0.5 mg/mm3) is described with at least one electrode (7, 8) which is provided with a thickened, for example globular portion (9, 10) at its end lying inside a lamp vessel (2). This portion is so dimensioned in dependence on operational parameters of the lamp and/or the diameter of the electrode rod that an electrode tip (19) forms itself independently at said portion during the first hours of operation. This tip grows from the portion until its free end starts melting. The electrode tip is self-adjusting in this manner, so that an optimum electrode interspacing is maintained throughout lamp life. Furthermore, a method of manufacturing such a lamp is described.
    Type: Grant
    Filed: December 10, 2001
    Date of Patent: April 22, 2003
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Guenther Hans Derra, Hanns Ernst Fischer, Dieter Leers, Holger Moench
  • Publication number: 20020117968
    Abstract: A high-pressure gas discharge lamp (HID or UHP lamp, or in general lamps with mercury fillings of between approximately 0.05 and 0.5 mg/mm3) is described with at least one electrode (7, 8) which is provided with a thickened, for example globular portion (9, 10) at its end lying inside a lamp vessel (2). This portion is so dimensioned in dependence on operational parameters of the lamp and/or the diameter of the electrode rod that an electrode tip (19) forms itself independently at said portion during the first hours of operation. This tip grows from the portion until its free end starts melting. The electrode tip is self-adjusting in this manner, so that an optimum electrode interspacing is maintained throughout lamp life. Furthermore, a method of manufacturing such a lamp is described.
    Type: Application
    Filed: December 10, 2001
    Publication date: August 29, 2002
    Inventors: Guenther Hans Derra, Hanns Ernst Fischer, Dieter Leers, Holger Moench
  • Patent number: 6380679
    Abstract: A short-arc discharge lamp (1) is provided with a translucent lamp vessel (10) which is closed in a gas-tight manner and which is provided with an ionizable fill. A first and a second electrode (11a, 11b) are arranged in the lamp vessel (10) which are each connected to its own current conductor (12a, 12b) which extends to outside the lamp vessel. A starting antenna (2) is arranged near to the lamp vessel, which antenna is connected to a further current conductor (24). The starting antenna comprises an antenna container (20) and a further electrode (22) which antenna container (20) is closed in a gas-tight manner and contains an ionizable fill, the further electrode (22) being connected to the further current conductor (24). This makes it possible to realize a shorter reignition time by means of a higher reignition voltage on the starting antenna while spark-over from the starting antenna (2) to the lamp vessel (10) is avoided.
    Type: Grant
    Filed: March 16, 1999
    Date of Patent: April 30, 2002
    Assignee: U.S. Philips Corporation
    Inventors: Dieter Leers, Klaus Lohn, Martin Ossmann, Johannes M. De Regt, Günther H. Derra, Hubertus C. M. Van Den Nieuwenhuizen
  • Patent number: 6304154
    Abstract: A circuit arrangement includes a self-oscillating oscillator circuit electrically connected with a series arrangement of a resistor arranged in series with a capacitor. The series arrangement determines the oscillation frequency of the oscillator circuit. The oscillator circuit serves to supply an oscillating supply voltage to an electronic device that exhibits a resonant frequency. A control signal output of the electronic device has a resistive coupling to the series arrangement. The control signal output serves to supply a control signal representative of the oscillation mode of the electronic device.
    Type: Grant
    Filed: January 31, 2000
    Date of Patent: October 16, 2001
    Assignee: U.S. Philips Corporation
    Inventors: Martin Ossmann, Dieter Leers
  • Patent number: 6184634
    Abstract: A circuit arrangement for supplying a lamp comprises a piezotransformer. During stationary operation the lamp is supplied via the piezotransformer. During ignition a DC-ignition voltage is generated over the secondary side of the piezotransformer acting as capacitor.
    Type: Grant
    Filed: March 24, 2000
    Date of Patent: February 6, 2001
    Assignee: U.S. Philips Corporation
    Inventors: Martin Ossmann, Dieter Leers
  • Patent number: 6157129
    Abstract: The discharge lamp comprises a piezotransformer and at least one of the lamp electrodes comprises a secondary side of the piezotransformer. Since the piezotransformer functions as a lamp electrode, as a ballast choke and as a transformer, the discharge lamp can be operated by means of a relatively simple and cheap ballast circuit.
    Type: Grant
    Filed: October 2, 1998
    Date of Patent: December 5, 2000
    Assignee: U.S. Philips Corporation
    Inventors: Bernd Rausenberger, Dieter Leers, Horst Dannert, Klaus Lohn, Martin Ossmann
  • Patent number: 6111765
    Abstract: A circuit for operating a discharge lamp having circut input terminals for connection to a supply voltage source and an inverter coupled to the circuit input terminals for generating an AC voltage at a frequency f from a supply voltage supplied by the supply voltage source. A piezotransformer has transformer input terminals coupled to the inverter output terminals. Terminals for lamp connection are coupled to the inverter output terminals and is provided for detecting whether the lamp has ignited. A protective device is coupled between the output terminals of the inverter and the transformer output terminals so that the inverter is effectively protected against damage due to ignition pulses generated by the piezotransformer.
    Type: Grant
    Filed: August 26, 1998
    Date of Patent: August 29, 2000
    Assignee: U.S. Philips Corporation
    Inventors: Hans G. Ganser, Dieter Leers, Klaus Lohn, Martin Ossmann, Pieter Postma
  • Patent number: 6104141
    Abstract: A circuit arrangement for operating a lamp has circuit input terminals for connection to a supply voltage source. An inverter is coupled to the circuit input terminals for generating an AC voltage with a frequency f from a supply voltage supplied by the supply voltage source and includes inverter output terminals. A piezotransformer has input terminals coupled to the inverter output terminals. Terminals for lamp connection are coupled to the inverter output terminals. A detector detects whether the lamp has ignited. The transformer input terminals are connected to the inverter output terminals only by means of passive components and the inverter comprises means coupled to the detector for changing the frequency f in response to the ignition of the lamp. The circuit arrangement is simple and inexpensive and need not provide a device for switching the piezotransformer out of the circuit after ignition of the lamp.
    Type: Grant
    Filed: August 26, 1998
    Date of Patent: August 15, 2000
    Assignee: U.S. Philips Corporation
    Inventors: Hans G. Ganser, Dieter Leers, Klaus Lohn, Martin Ossmann, Pieter Postma
  • Patent number: 5962954
    Abstract: A piezo-electric transformer comprising a piezo-electric body (PEB) including a driving region having input electrodes (1, 3) and at least one driven region having output electrodes (E11). These regions have opposite faces with at least one of the regions comprising a number of sections polarized in a direction perpendicular to the opposite faces and one pole of each section being connected to an opposite pole of another section by electrically conductive elements (2, 1', 2') in such a way that the sections form a series arrangement.These sections are in a very simple way effectively arranged in series, thereby increasing the input impedance of the piezo-electric transformer. Because the sections are polarized in opposing directions the electrically conductive elements can be of a very simple construction which do not require external conduction wires.
    Type: Grant
    Filed: September 16, 1997
    Date of Patent: October 5, 1999
    Assignee: U.S. Philips Corporation
    Inventors: Dieter Leers, Klaus Lohn
  • Patent number: 5384195
    Abstract: The invention relates to an antifriction body (3), in particular for a magnetic head (1), whose antifriction surface (4) is provided with an antifriction layer (4) which contains diamond crystals and which is provided by means of a CVD process. Damage to the elements sliding past the antifriction layer is precluded in that the antifriction layer (4) contains hexagonal lonsdaleite crystals.
    Type: Grant
    Filed: May 24, 1993
    Date of Patent: January 24, 1995
    Assignee: U.S. Philips Corporation
    Inventors: Peter Bachmann, Dieter Leers, Detlef Wiechert
  • Patent number: 4802733
    Abstract: In an optical fiber based on silicon dioxide with fluorine doping which determines its refractive index profile, at least in the light transmitting core a substance is added that increases the thermal expansion coefficient. The added substance is uniformly distributed at least in the light transmitting core, and reduces the influence of the drawing force F.sub.Z (during drawing of the preform) on the Rayleigh scattering .alpha..sub.R and the wavelength-independent "c term" losses. Even at high fluorine dopant concentrations, low Rayleigh scattering losses in the range of the material-intrinsic losses pure for silicon dioxide are achieved. The OH-contamination level is also further reduced, and cracks in the collapsed preforms are largely avoided.
    Type: Grant
    Filed: December 30, 1985
    Date of Patent: February 7, 1989
    Assignee: U.S. Philips Corp.
    Inventors: Peter K. Bachmann, Peter E. E. Geittner, Dieter Leers, Howard J. C. Wilson