Patents Assigned to Sagem
  • Method and device for electromagnetic valve actuating
    Patent number: 6397798
    Abstract: The electromagnetic valve actuator has a valve drive armature and return springs provided to hold the valve in a determined rest position substantially halfway between two extreme positions namely a valve closed position and a valve open position. An electromagnetic unit has a ferromagnetic core placed on both sides of the armature and a power supply circuit. The power circuit calculates the velocity with which the armature approaches each of its extreme positions by measuring the current flowing through the electromagnetic unit and it applies a current to the electromagnetic unit which servo-controls variation of the velocity for compliance with a determined reference profile.
    Type: Grant
    Filed: April 10, 2001
    Date of Patent: June 4, 2002
    Assignee: Sagem SA
    Inventor: Calogero Fiaccabrino
  • Cross-linkable semiconductive composition, and an electric cable having a semiconductive coating
    Patent number: 6395989
    Abstract: A cross linkable composition includes a copolymer part being composed of a copolymer of ethylene and an organic acid salt of an alkyl, alkenyl, or alkynyl radical including 26% to 42% by weight of monomer, representing 50% to 90% by weight of the polymer phase; and an acrylonitrile-butadiene copolymer having 25% to 50% by weight acrylonitrile, representing 10% to 50% by weight of the polymer phase. It further has carbon black having a specific surface area of less than 170 m2/g, representing 40% to 75% by weight of the polymer phase and additives such as antioxidants, anti-coppers, peroxides, silanes, in quantities that generally remain below 5% of the polymer phase.
    Type: Grant
    Filed: May 15, 2001
    Date of Patent: May 28, 2002
    Assignee: Sagem SA
    Inventors: Jean-François Lecoeuvre, Karine Paty, Bernard Poisson, Patrick Sanchez
  • Electronic power module and a method of manufacturing such a module
    Patent number: 6395999
    Abstract: The module including an aluminum-based metal substrate (10) and at least one copper-based bar (12) constituting an equipotential connection which is fixed to the substrate via an insulating layer. A power component (16) is in direct contact with the bar via a surface area that is smaller than the area of the insulating layer. A printed circuit card (18) mounted on the bar(s) and projecting therefrom carries low heat-dissipation components of the module.
    Type: Grant
    Filed: September 12, 2001
    Date of Patent: May 28, 2002
    Assignee: Sagem SA
    Inventor: Olivier Ploix
  • Device for measurement of the electrical consumption of a portable data- or signal-processing terminal
    Patent number: 6392399
    Abstract: The device for measurement of current exchanged between a battery (1) and electrical circuits (19) of a portable telephone includes a current sensor (21), connecting the battery (1) to the circuits (19), connected to a first input (22) of first integrating circuits (22-27), integrating the current measurement and controlling a comparator (28, 29, 34) detecting the crossing of a high threshold (Vs+) through the integral of the current and applying to a second input (23) of the first integrating circuits (22-27) a calibrated feedback signal to recall below the high threshold (Vs+), second integrating circuits (12-17) to integrate the feedback signals, providing a measurement of the current exchanged. The invention applies well to mobile telephones.
    Type: Grant
    Filed: January 11, 2000
    Date of Patent: May 21, 2002
    Assignee: Sagem SA
    Inventor: Robert Bernard
  • Electronically-commutated motor
    Patent number: 6388405
    Abstract: The motor has a stator and a rotor. One of the elements has coils constituting a three-phase winding and an electronic control module having inputs connected to rotor position sensors and to a speed reference signal (Vc), and including a power circuit for powering the phases from a DC source under the control of a processor. The processor causes the phases to be powered at variable duty ratio so as to regulate speed in a first mode without overlap in time between the periods in which the various phases are powered with voltage pulses, and in a second mode in which there is 33% overlap of power to two phases, and it causes a changeover from the first mode to the second mode when the duty ratio reaches a predetermined value lying in the range 70% to 100%, and a changeover from the second mode to the first mode when the duty ratio falls below another predetermined value.
    Type: Grant
    Filed: January 17, 2001
    Date of Patent: May 14, 2002
    Assignee: Sagem SA
    Inventor: Jean-Marie Laurent
  • Method and device of processing a signal sensed on board a vehicle from one of its wheels, and corresponding learning method
    Patent number: 6385511
    Abstract: Detection and transmission modules respectively fitted on several wheels of the vehicle are set up to transmit a detection signal incorporating an indication of a state of the wheel. The sensed signal is compared with several waveforms, respectively stored in relation to wheel positions, in order to select a wheel position for which the stored waveform matches the sensed signal. After pre-processing the sensed signal and identifying extrema of the pre-processed signal, the comparison between the sensed signal and a waveform comprises applying a time transform to the pre-processed signal to align first and second extrema of the pre-processed signal with first and second extrema of said waveform and computing a distance between the transformed signal and said waveform. The wheel position selected is the one for which the computed distance is minimum.
    Type: Grant
    Filed: February 13, 2001
    Date of Patent: May 7, 2002
    Assignee: Sagem SA
    Inventors: Jean-Christophe Fondeur, Pierre Chastel
  • Device for estimating richness in an injection system for an internal combustion engine
    Patent number: 6357429
    Abstract: The apparatus for estimating the richness of the mixture admitted into each of the n combustion chambers of an engine having injectors comprises a sensor (26) supplying an output signal that varies in substantially linear manner with richness and that is placed at the junction point between the exhausts from the chambers, and also comprises calculation means. These means store a model of the behavior of the exhaust at the junction point based on the assumption that the richness at the junction point is a weighted sum of contributions from the exhausts from the individual chambers, with the weighting coefficient being smaller with increasing age of the combustion in the chamber, and serving on each pass through top dead center to estimate the air/fuel ratio on the basis of the measured values and of the model.
    Type: Grant
    Filed: July 13, 2000
    Date of Patent: March 19, 2002
    Assignee: Sagem SA
    Inventors: Claudio Carnevale, Mourad Hadji
  • Cable with optical fibers retained in a sheath
    Patent number: 6334015
    Abstract: In order to prevent microcurvatures in the optical fibers when the cable is subjected to temperature variations in the range from approximately −40° C. to approximately +85° C., a cable with N optical fibers (FO) each having a core (1) and a coating (2) with coefficients of thermal expansion/compression &agr;1 and &agr;2, Young's modulus in traction E1 and E2 and sections S1 and S2 comprises a retaining sheath (3) enveloping the optical fibers buried in a filling material (4) having a coefficient of thermal expansion/compression &agr;4, Young's modulus in traction E4 and section S4. The sheath (3) satisfies the condition: (&agr;3.E3.S3)≦[(&agr;1.E1.S1)+(&agr;2.E2.S2)](N/14)+(&agr;4.E.4.S4) in which &agr;3, E3 and S3 are respectively the coefficient of thermal expansion/compression, the Young's modulus in traction and the section of the sheath.
    Type: Grant
    Filed: May 4, 2001
    Date of Patent: December 25, 2001
    Assignee: Sagem SA
    Inventor: Patrick Jamet
  • Cable with optical fibers retained in a sheath
    Publication number: 20010038739
    Abstract: In order to prevent microcurvatures in the optical fibers when the cable is subjected to temperature variations in the range from approximately −40° C. to approximately +85° C., a cable with N optical fibers (FO) each having a core (1) and a coating (2) with coefficients of thermal expansion/compression &agr;1 and &agr;2, Young's modulus in traction E1 and E2 and sections S1 and S2 comprises a retaining sheath (3) enveloping the optical fibers buried in a filling material (4) having a coefficient of thermal expansion/compression &agr;4, Young's modulus in traction E4 and section S4.
    Type: Application
    Filed: May 4, 2001
    Publication date: November 8, 2001
    Applicant: SAGEM SA
    Inventor: Patrick Jamet
  • Fluid-insulated electrical link device
    Patent number: 6309235
    Abstract: The electrical link device comprises an enclosure (1, 9) containing a fluid insulator (2), a conductive link bar (3) disposed inside the enclosure and having one end fixed in leakproof manner to an insulating elastomer sleeve (12) that passes through the wall of the enclosure in leakproof manner, the link bar (3) being connected inside the enclosure to a pluggable connection member (6) surrounded by a conductive screen (15), the elastomer sleeve (12) also including a conductive deflector (16) flush with the inside surface of the insulating sleeve at a distance from the conductive screen (15).
    Type: Grant
    Filed: February 8, 2000
    Date of Patent: October 30, 2001
    Assignee: Sagem SA
    Inventor: Pierre Argaut
  • Mobile telephone comprising an improved battery charger circuit
    Patent number: 6310461
    Abstract: The leakage current in a circuit for charging a battery is eliminated by placing a switch in series with the resistor connecting the emitter and the base of a transistor. When this switch is open the current can no longer flow through and there is therefore no longer any leakage current. This switch is controlled by a microprocessor through a bus and the battery can be charged in pulsed mode. Furthermore, the circuit has no protection diode against reverse voltage and over voltage.
    Type: Grant
    Filed: June 28, 2000
    Date of Patent: October 30, 2001
    Assignee: Sagem SA
    Inventor: Fernando Romao
  • Connector for smart cards
    Publication number: 20010031580
    Abstract: To enable the insertion of an integrated circuit (8) between the contact terminals of a smart card (4) connecter (3) in a mobile telephone (1) and to simplify the manufacture of such a connector, an unoccupied location (7) is produced by making the connector out of two elements (5, 6), each supporting a group of flat contact terminals (3 1-3 3, 3 4-3 6) with contact surfaces (4 1-4 3, 4 4, 4 6) of the smart card.
    Type: Application
    Filed: February 24, 2001
    Publication date: October 18, 2001
    Applicant: Sagem SA
    Inventor: Fernando Romao
  • Voice and data terminal for a radiotelephone network
    Patent number: 6301488
    Abstract: A radio-telephone terminal includes connection structure which connects to a radio-telephone network, a telephone handset and a data adaptation circuit arranged to be connected to a data transmission apparatus. The adaptation circuit is integrated into the terminal and can include a microprocessor arranged to manage vocal telephone communications and the data passing through the adaptation circuit.
    Type: Grant
    Filed: December 15, 1998
    Date of Patent: October 9, 2001
    Assignee: Sagem SA
    Inventors: Raphaël Alos, Marc Porato, Jean-Marc Dimech, Francis Sykes
  • Electronics module and a method of manufacturing such a module
    Patent number: 6295199
    Abstract: The module has a metal substrate having one major face that is insulated and that carries electrical connection tracks, and at least one power component fixed to the substrate and having connection tabs (20) that are soldered to the tracks. The power component is fixed on the non-insulated face and it is placed in a housing constituting an inside wall of a cooling fluid circuit, or it is stuck thereto. The tabs of the component pass through the substrate via holes therein.
    Type: Grant
    Filed: August 15, 2000
    Date of Patent: September 25, 2001
    Assignee: Sagem SA
    Inventor: Jean-Yves Le Gouil
  • Electrical power component mounted by brazing on a support and corresponding mounting process
    Patent number: 6292368
    Abstract: An electrical power component is provided with electrodes including, on one of the faces of the component, a single electrode, the electrodes being connectable by brazing to an electrical connection support by means of an electrical and thermal connection plate.
    Type: Grant
    Filed: March 8, 2000
    Date of Patent: September 18, 2001
    Assignee: Sagem SA
    Inventor: Denis Pradel
  • Fluid fuel injector for an internal combustion engine
    Patent number: 6273346
    Abstract: An injector in a spark ignition engine combustion chamber has an injector body containing a needle with a closure element co-operating with a fuel passage seat extended by a diffusion port. The needle is axially movable between a first position wherein the closure element bears against the seat and a second position wherein the closure element is away from the seat, It further has a single-piece diabolo-shaped element fixed in the downstream part of the body, The seat, the diffusion port and a bore for slidingly guiding the needle are formed in the one-piece element. It defines, with the body downstream part of the body a fuel supply chamber and has ports communicating the chamber with the bore immediately upstream of the seat and emerging tangentially in the bore.
    Type: Grant
    Filed: April 25, 2000
    Date of Patent: August 14, 2001
    Assignee: Sagem SA
    Inventors: Christine Estevenon, Richard Croche
  • Indium-based alloy and an infrared transducer using such an alloy
    Patent number: 6274882
    Abstract: The alloy is for making an infrared transducer. It is constituted by (In1−xTlx) (As1−ySby) in which 0≦x<1 and 0<y<1 (where x and y are less than ½). On a GaSb or AlSb substrate, the transducer comprises an active layer of the alloy having a composition such that its lattice is of a size that is equal to that of the substrate material.
    Type: Grant
    Filed: February 26, 1999
    Date of Patent: August 14, 2001
    Assignee: Sagem SA
    Inventors: Christian Verie, Dominique Lorans, Michel Poirier
  • Ignition component for internal combustion engines
    Patent number: 6259344
    Abstract: The object of the invention is an ignition component for internal combustion engines. It comprises: a secondary winding (4); high-voltage output means (11-13) for the said secondary winding capable of supplying an ignition spark to a cylinder of an internal combustion engine; a primary winding (2); a casing (7) in which are arranged the said windings and the said high-voltage output means; and holding means for holding the windings and the output means in the casing.
    Type: Grant
    Filed: November 14, 1995
    Date of Patent: July 10, 2001
    Assignee: Sagem SA
    Inventors: Pierre Heritier-Best, Laurent Coste
  • Internal combustion engine multipoint injection module
    Patent number: 6247451
    Abstract: The invention concerns an injection module comprising a ramp (10) to be connected to a supply pump and several injectors (12) connected to the ramp each provided with electric control means for opening and closing them. The module comprises means for storing a calibrating function of each of the injectors (12) and supply the function in a form that can be used by a computing unit (24) controlling the electric means for opening and closing the injectors.
    Type: Grant
    Filed: December 13, 1999
    Date of Patent: June 19, 2001
    Assignee: Sagem S.A.
    Inventors: Christine Estevenon, Henri Trintignac
  • Video camera having deviating means for improving resolution
    Patent number: 6249312
    Abstract: The video camera comprises a detector having a two-dimensional matrix of photosensitive sites that accumulate charge, the sites being placed in an image plane of an optical system and being connected to a circuit for periodically transferring the accumulated charges at a determined frequency. A deviation member is interposed on the path of light towards the matrix and enables said path to be deflected about a nominal direction. A unit for periodically controlling the deviation means causes the image to be deviated in two dimensions, in a first determined cycle each time through a determined fraction of the pitch step size so as to perform space oversampling, and, in a second cycle, each time through a full pitch step size, which second cycle is a multiple of the first. A processor unit calculates the gain differences and the response offsets between the sites by performing comparisons therebetween.
    Type: Grant
    Filed: November 12, 1997
    Date of Patent: June 19, 2001
    Assignee: Sagem SA
    Inventor: Michel Broekaert