Patents Assigned to U.S.
  • Patent number: 5991608
    Abstract: A portable electronic apparatus is disclosed having an antenna and a communication circuit. The antenna impedance is chosen to be a predetermined value which is deliberately mismatched to the impedance of the communication for a predetermined frequency band. This mismatch is chosen to optimize the signal loss between the antenna and the communication circuit when the antenna is far and near a disturbing source. The imaginary part of the antenna impedance has a sign opposite to the sign of the circuit impedance when the antenna is a predetermined distance from the disturbing source.
    Type: Grant
    Filed: March 12, 1997
    Date of Patent: November 23, 1999
    Assignee: U.S. Phillips Corporation
    Inventor: Lukas Leyten
  • Patent number: 5990626
    Abstract: A lighting unit according to the invention comprises a supply unit (1) and a low-pressure mercury discharge lamp (2). The low-pressure mercury discharge lamp has a light-transmitting discharge vessel (3) which is provided with a luminescent layer (3) on an inner surface and which encloses in a gastight manner a discharge space (4) which is provided with a filling comprising mercury and one or several rare gases. A first (5a) and a second electrode (5b) are arranged in the discharge space, each comprising a coiling of a metal wire coated with one or several electron-emitting metal oxides. Each electrode is electrically connected to a respective current supply conductor (6a, 6b) which extends to outside the discharge vessel (3). The current supply conductors are electrically connected to the supply unit outside the discharge vessel, the unit ignites the low-pressure mercury discharge lamp in the state upon switching-on.
    Type: Grant
    Filed: February 13, 1998
    Date of Patent: November 23, 1999
    Assignee: U.S. Philips Corporation
    Inventors: Jean J. Heuvelmans, Abraham L. De Smit
  • Patent number: 5989738
    Abstract: An organic electroluminescent component with a layer arrangement includes a first electrode layer, an inorganic layer which conducts electrons, one or several optoelectronically active layers with at least one light-emitting layer which comprises an organic emitter, and a second electrode layer. The inorganic layer which conducts electrons is an N-type conducting oxide of a transition metal chosen from the group consisting of zirconium oxide, hafnium oxide, vanadium oxide, barium titanate, barium-strontium titanate, strontium titanate, calcium titanate, calcium zirconate, potassium tantalate, and potassium niobate.
    Type: Grant
    Filed: June 24, 1997
    Date of Patent: November 23, 1999
    Assignee: U.S. Philips Corporation
    Inventors: Markus Haase, Ulrich Kynast, Herbert Boerner, Cornelis Ronda
  • Patent number: 5991351
    Abstract: A method for integrating liquid metal magnetohydrodynamic power generation with fusion blanket technology to produce electrical power from a thermonuclear fusion reactor located within a confining magnetic field and within a toroidal structure. A hot liquid metal flows from a liquid metal blanket region into a pump duct of an electromagnetic pump which moves the liquid metal to a mixer where a gas of predetermined pressure is mixed with the pressurized liquid metal to form a Froth mixture. Electrical power is generated by flowing the Froth mixture between electrodes in a generator duct. When the Froth mixture exits the generator the gas is separated from the liquid metal and both are recycled.
    Type: Grant
    Filed: September 22, 1998
    Date of Patent: November 23, 1999
    Assignee: U.S. Department of Energy
    Inventor: Robert D. Woolley
  • Patent number: 5988572
    Abstract: This device comprises:a holder part (32) in which the terminal (1) comes to rest,a fixed part (30)a fitting system for connecting the two parts, formed by:a ball joint (50) fixed to one of the parts,an opening (52) provided in the other part, for allowing the engagement of said ball joint,a ball joint positioning system (55, 57),a locking hook (60) for locking the holder part onto the fixed part.
    Type: Grant
    Filed: June 23, 1998
    Date of Patent: November 23, 1999
    Assignee: U.S. Philips Corporation
    Inventors: Laurent Chivallier, Patrick Guerillot
  • Patent number: 5991770
    Abstract: A method and system are provided for automatically generating Internet formatted data files from nonInternet formatted data files. The present invention includes processing one or more directories selected by a user to locate and tag any files of a type to be converted. A file list is created and output as a spreadsheet type text file containing the file information for each file to be processed. Each located file is then converted into an Internet ready file format, and transferred to a chosen destination. The present invention allows for automatic generation of an Internet yellow page directory using nonInternet formatted customer advertising data files with significantly reduced production costs and likelihood of processing error.
    Type: Grant
    Filed: December 30, 1997
    Date of Patent: November 23, 1999
    Assignees: U S West, Inc, MediaOne Group
    Inventors: Michele Zamora-McKelvy, Marlon D. Buggs, Bryan Stroble, Daniel Pride
  • Patent number: 5987749
    Abstract: A method of manufacturing a dynamic groove bearing (45, 71, 111) with an external bearing part (17, 61, 91) and an internal bearing part (47, 67, 113) which are rotatable relative to one another and which have cooperating bearing surfaces (39, 53), (63, 69), (103, 121) with groove patterns (41, 65, 105). According to the invention, the bearing surface (39, 63, 103) of one of the bearing parts (17, 61, 91) is formed and simultaneously provided with the groove pattern (41, 65, 105) through plastic deformation of a ductile material (36, 100) by means of a press tool (37, 101) and a die (1, 55, 73) with a die pattern (13, 59, 83) which corresponds to the groove pattern (41, 65, 105). The ductile material (36, 100) is, for example, a tin alloy such as white metal or Babbitt's metal. The die (1, 55, 73) can be repeatedly used so that large numbers of dynamic groove bearings (45, 71, 111) according to the invention can be manufactured in a comparatively simple manner.
    Type: Grant
    Filed: September 19, 1996
    Date of Patent: November 23, 1999
    Assignee: U.S. Philips Corporation
    Inventor: Leonardus P. M. Tielemans
  • Patent number: 5989382
    Abstract: Specialized sheets, for example, in the construction of business forms, having patterns of pressure activated cohesive are constructed so that all the sheets can be identical yet when the sheets are in a stack blocking of the pressure activated cohesive, and subsequent feeding problems, are eliminated by making the cohesive patterns offset a dimension "d" perpendicular to the direction of feed of the forms from a feed bin through an imaging device to an output tray. Either the feed bin, or an edge guide of the output tray, can be shifted at least the dimension "d" to automatically align the pressure activated cohesive patterns on cooperating first and second sheets, and after proper alignment of the cohesive patterns the sheets may be fed through a conventional pressure sealer.
    Type: Grant
    Filed: July 29, 1997
    Date of Patent: November 23, 1999
    Assignee: Moore U.S.A., Inc.
    Inventor: Rebecca L. Parker
  • Patent number: 5990641
    Abstract: A motor control device controls an electric 3-phase brushless d.c. motor (10) having a magnetic rotor (15) and three windings (11, 12, 13). The motor control device includes a detection unit (20) adapted to generate a commutation signal (21) on the basis of the back-emf voltage produced in the windings (11, 12 and 13). The motor control device further includes an output stage (30) having a first terminal (31) and a second terminal (32) for the connection of a power-supply source, outputs (33, 34, 35) for the connection of the windings (11, 12 and 13) and a number of semiconductor elements (36) for selectively coupling the terminals (31, 32) to the outputs (33, 34, 35) in dependence upon the commutation signal (21). The motor control device further includes a phase detector (40) adapted to generate a phase-error signal (43) which is representative of the phase difference between a sensor signal and a reference signal.
    Type: Grant
    Filed: November 10, 1997
    Date of Patent: November 23, 1999
    Assignee: U.S. Philips Corporation
    Inventors: Marinus C. W. Van Buul, Gerardus A. M. Van Beijsterveld, Nicolaas J. Damstra, Henricus C. J. Buthker
  • Patent number: 5990945
    Abstract: Compressed digitally encoded video signals are transmitted over an asynchronous transfer mode network with varying grades of service dependent on bitrate requirements for a desired picture quality and the currently available network capacity. To maximize transmission quality and minimize cost, the grade of service requested from the network is changeable in response to scene changes.
    Type: Grant
    Filed: August 29, 1997
    Date of Patent: November 23, 1999
    Assignee: U.S. Philips Corporation
    Inventors: Atul N. Sinha, Theodorus J. J. Denteneer, Serverius P. P. Pronk, Hendrik G. J. Theunis
  • Patent number: 5991089
    Abstract: Projection lens having long focal lengths for use with LCD panels are provided. The lenses have a first lens unit which has a positive power and a second lens unit which has a negative power. The first lens unit contains at least three lens elements organized into two subunits, namely, a positive first lens subunit having a positive lens element and a negative lens element and a positive second lens subunit having a positive lens element. The second lens unit contains at least two lens elements, namely, a positive lens element and a negative lens element. The projection lens preferably employs only five lens elements arranged in a positive, negative, positive, positive, negative configuration.
    Type: Grant
    Filed: January 28, 1998
    Date of Patent: November 23, 1999
    Assignee: U.S. Precision Lens Inc.
    Inventor: Melvyn H. Kreitzer
  • Patent number: 5991607
    Abstract: A switching device is disclosed having a ring circuit with four nodes and four switching elements which selectively interconnect the four nodes. A first compensation branch inter-connects a first pair of mutually opposing nodes, and a second compensation branch inter-connects a second pair of mutually opposing nodes. The first compensation branch generates a first parallel resonance in conjunction with a first non-conducting one of the four switching elements, and the second compensation branch generates a second parallel resonance in conjunction with a second non-conducting one of the four switching elements. The first parallel resonance is connected in parallel to a conducting one of the four switching elements, and the second parallel resonance is connected in parallel to the conducting one of the four switching elements. Each compensation branch includes an inductor which forms the respective parallel resonances in conjunction with a capacitance of a non-conducting switching element.
    Type: Grant
    Filed: August 27, 1997
    Date of Patent: November 23, 1999
    Assignee: U.S. Philips Corporation
    Inventors: Ralf Burdenski, Christopher Marshall
  • Patent number: 5991167
    Abstract: A DC to DC power converter which can suitably be used, for example, in a charger device for rechargeable batteries has an input and a load output, a resonant transformer provided with a transformer input and a transducer output coupled to the load output, an output rectifier circuit coupled to the load output, a controllable transformer control circuit, in the form of a pulse providing circuit, coupled between the input of the converter and the transformer input, and a synchronous output rectifier circuit coupled between the transformer output and the load output. The transformer control circuit receives a control signal derived from a signal constituting or proportional a signal at the transformer output. The output rectifier circuit shows a variety of possible embodiments, each embodiment including at least two transistor switches which are connected between a different end of the transformer output and a same end of the load output.
    Type: Grant
    Filed: March 11, 1998
    Date of Patent: November 23, 1999
    Assignee: U.S. Philips Corporation
    Inventor: Steven J. W. Van Lerberghe
  • Patent number: 5991400
    Abstract: In a conditional access system, transmitted information is recorded in a scrambled form SV. Accordingly, any access to the recorded information SV is subject to the condition that proper control word(s) CW are available. To enable access to the recorded information SV, control word regeneration data ECM, KRD is stored. The proper control word(s) CW cannot easily be derived from this control word regeneration data ECM, KRD. However security device SCD is capable of retrieving the proper control word(s) CW from the control word regeneration data ECM, KRD. A system operator effectively masters operations carried out in the security device SCD. Accordingly, if the system operator so desires, he may inhibit retrieval of the control word(s) CW and, consequently, prevent access to the recorded information SV. The conditional access system may be used in, for example, pay-TV or multimedia purposes.
    Type: Grant
    Filed: October 29, 1996
    Date of Patent: November 23, 1999
    Assignee: U.S. Philips Corporation
    Inventor: Franciscus L.A.J. Kamperman
  • Patent number: 5987672
    Abstract: Magnetic resonance apparatus includes an examination zone (29) for receiving an object (37) to be examined, a component (41) of an electrically non-conductive plastic material being located in the examination zone at least when the apparatus is in an operating condition. In order to reduce the visibility of this component (41) in MR experiments, the plastic material contains an additive of a paramagnetic material.
    Type: Grant
    Filed: June 23, 1997
    Date of Patent: November 23, 1999
    Assignee: U.S. Philips Corporation
    Inventor: Lambertus J.M.P. Oosterwaal
  • Patent number: 5990817
    Abstract: The invention relates to an A/D conversion device intended to supply at the output a digital signal Vout[0:7] resulting from the conversion of an analog input voltage Vin and receiving a control signal CRS used for defining the transfer characteristic of the device by way of comparison with the output signal Vout[0:7]. According to the invention, such a device comprises a reference module (AO, CMP2) which allows adjustment of the digital value of the output signal Vout[0:7] at a predetermined value when the analog input voltage Vin is zero, and means (Mx, Vact) for substituting for said voltage Vin a reference voltage Vref having a predetermined value when the device is in its control mode.
    Type: Grant
    Filed: October 23, 1997
    Date of Patent: November 23, 1999
    Assignee: U.S. Philips Corporation
    Inventors: Philippe Belin, Herve Marie
  • Patent number: 5990959
    Abstract: A method, system and product are provided for direct rendering of video images to a compressed video data stream. The method includes generating encoded video data directly from an electronic graphic system, the encoded video data representing a full frame image, and generating update encoded video data directly from the electronic graphic system, the update encoded video data representing changes in the full frame image. The method also includes generating movement vector encoded video data directly from the electronic graphic system, the movement vector encoded video data representing movement in the full frame image, and decoding the encoded video data, the update encoded video data, and the movement vector encoded video data for playback at a destination. The system includes control logic for performing the method. The product includes a storage medium having computer readable programmed instructions recorded thereon for performing the method.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: November 23, 1999
    Assignees: U S West, Inc., MediaOne Group, Inc.
    Inventor: Eliot M. Case
  • Patent number: 5986408
    Abstract: The invention relates to a circuit arrangement for operating a discharge lamp with a high frequency current comprising a power feedback circuit and an electrode preheater. The circuit arrangement comprises an antiboost switch for disabling the power feedback circuit before the lamp has ignited and enabling the power feedback circuit after the lamp has ignited. In accordance with the invention the antiboost switch is also used to enable the electrode preheater before the lamp has ignited and to disable the electrode preheater after the lamp has ignited.
    Type: Grant
    Filed: March 31, 1999
    Date of Patent: November 16, 1999
    Assignee: U.S. Philips Corporation
    Inventors: Wilhelmus H. M. Langeslag, Paulus P. B. Arts
  • Patent number: D416560
    Type: Grant
    Filed: April 21, 1998
    Date of Patent: November 16, 1999
    Assignee: U.S. Philips Corporation
    Inventor: Eduardus Josephus Anna Maria Tonino
  • Patent number: D417024
    Type: Grant
    Filed: February 26, 1998
    Date of Patent: November 23, 1999
    Assignee: U.S. Philips Corporation
    Inventor: Joseph Lucas Stuyfzand