Patents Assigned to Sagem
  • Method of controlling a laser gyro by the amplitude of the winking signal
    Patent number: 7327461
    Abstract: A push-pull method of controlling a laser gyro. At least three mirrors form a closed-loop light path for two laser beams propagating in opposite directions, which is subjected to movement. At least two of the mirrors are associated with actuators connected to push-pull control members for controlling the positions of the mirrors to minimize the amplitude of the winking signal which occurs in a lased intensity signal of the laser beams. The method includes detecting the frequency of the winking signal of at least one laser beam, and of triggering the measurement of the amplitude of the winking signal when the frequency of the winking signal is less than a predetermined threshold corresponding to passing into a dead band of the gyro.
    Type: Grant
    Filed: April 13, 2005
    Date of Patent: February 5, 2008
    Assignee: Sagem SA
    Inventor: Christian Lignon
  • Imaging device with focus switching means for day and night vision
    Patent number: 7297924
    Abstract: An optronic observation device including a detector having a photocathode and a sensor arranged to receive an incident light beam. The device also including a switch to position an optical element opposite the detector in the pathway of the incident beam or to retract the optical element and a focusing element to focus an incident ray on the photocathode when the optical element is in a retracted position. When the optical element is positioned opposite the detector, it is able to focus the beam on the sensor and to filter the beam spectrally to block all or part of the wavelengths for which the responsiveness of the photocathode is greater than a given threshold.
    Type: Grant
    Filed: January 13, 2006
    Date of Patent: November 20, 2007
    Assignee: Sagem Defense Securite
    Inventors: Geoffroy DelTel, Sylvain Faure, Denis Guettier, Philippe Patry
  • Materials of active-piston actuators
    Patent number: 7298068
    Abstract: The invention concerns an actuator that includes an active piston, an inner sliding cylinder and an outer cylinder in which the said sliding cylinder is pre-stressed, where one of the cylinders is in a material with a negative thermal expansion coefficient or one that is close to zero, with the other cylinder having a positive thermal expansion coefficient, in which the material of the cylinder with negative expansion coefficient or one close to zero is one of the following materials: ?-ZrMo2O8 in cubic structure, Zr2W P2O12, a silicious faujasite, Lu2 (WO4)3, ZrW2O8 in cubic phase, with nanograins whose size is approximately between 10 nm and 75 nm, or any possible combination of these materials.
    Type: Grant
    Filed: May 31, 2006
    Date of Patent: November 20, 2007
    Assignee: Sagem Defense Securite
    Inventors: Oscar D'Almeida, Mathias Woydt, Jean-Thierry Audren
  • Method of charging a battery, and a corresponding charger and battery
    Publication number: 20070252557
    Abstract: The present invention relates to a method of charging a battery having internal resistance, the method including the step of feeding the battery with substantially constant charging current at a charging voltage that is regulated so as to compensate at least in part for the voltage drop generated by the internal resistance of the battery. The invention also provides a charger and a battery for implementing the method.
    Type: Application
    Filed: April 25, 2007
    Publication date: November 1, 2007
    Applicant: SAGEM DEFENSE SECURITE
    Inventor: Michel Nollet
  • Person identification control method and system for implementing same
    Publication number: 20070194884
    Abstract: The invention relates to a person identification control method and to a system for implementing same. The inventive method comprises the following steps consisting in: detecting biometric data (23, 48, 79, 94, 108) relating to at least one person; seeking a concordance between the biometric data relating to the person and biometric data that have been pre-stored in a biometric database (26, 51, 83, 97, 110), said pre-stored biometric data relating to persons for whom identification means have already been generated; and, when no concordance is found, generating an identification means (29, 56, 84, 98, 103, 111) that is associated with the person from the biometric data relating to the person and at least one identity (24, 49, 80, 95, 117) for said person.
    Type: Application
    Filed: March 7, 2005
    Publication date: August 23, 2007
    Applicant: Sagem Defense Securite
    Inventors: Bernard Didier, Francois Rieul
  • Cooled photodetector
    Patent number: 7253396
    Abstract: Cooled photosensitive cell (80) comprising a table (50), sensors (66) which are fitted on the table, a screen (80) to prevent parasitic radiation on the sensors, and at least one Joule-Thomson cooler (41, 42) to cool the table and the screen. The table (50) and the screen (80) are cooled by convection, the table (50) being provided with apertures (55) for passage of the cooling flow, which communicate with an annular cavity (63) for cooling of the screen (80).
    Type: Grant
    Filed: December 23, 2002
    Date of Patent: August 7, 2007
    Assignee: Sagem SA
    Inventor: Joseph Loiseau
  • Battery, electrical equipment, and a powering method implementing means for short-circuiting the battery
    Publication number: 20070160900
    Abstract: The present invention relates to a method of supplying electrical power to an equipment by means of a battery, said method including the step of short-circuiting the battery until it has a temperature greater than a predetermined threshold, characterized in that the battery is short-circuited with a temporal duty ratio determined to keep the equipment functioning and to maintain the temperature of the battery above the predetermined threshold. The invention also relates to a battery and an electrical equipment for implementing that method.
    Type: Application
    Filed: December 21, 2006
    Publication date: July 12, 2007
    Applicant: SAGEM DEFENSE SECURITE
    Inventor: Michel Nollet
  • Method for production of a mechanical resonator with a planar monolithic vibrating structure machined in a crystalline material and resonator produced thus
    Patent number: 7242133
    Abstract: The invention relates to the production of a mechanical resonator with a planar monolithic vibrating structure machine in a crystalline material. Where the material is trigonal (1), trigonal (2) or hexagonal in structure, said material is cut in the [001] plane or, where said material is cubic in structure, said material is cut in the [111] plane and the vibration mode of order 2 is used. Where the material is tetragonal (1) or tetragonal (2) or hexagonal said material is cut in the [001] plane or where said material is cubic in structure said material is cut in the [001], [100], or [010] plane and the vibration mode of order 3 is used. The resonator thus has a natural material frequency isotropy (?fm=0).
    Type: Grant
    Filed: April 11, 2003
    Date of Patent: July 10, 2007
    Assignee: Sagem SA
    Inventor: José Beitia
  • Battery, equipment, and methods of putting such a battery and such equipment into a storage condition
    Publication number: 20070152636
    Abstract: The invention relates to a battery provided with a self-discharge circuit comprising an activation element for activating the self-discharge circuit and at least one current-consuming element connected to terminals of the battery via a connection member that can be actuated selectively to go into a self-discharge circuit connection state or to go into a self-discharge circuit disconnection state, and that is caused to disconnect the self-discharge circuit at a predetermined charge state that is less than a rated charge state of the battery. The invention also relates to equipment provided with a discharge circuit for discharging the battery, and to methods of putting such a battery or such equipment into a storage condition.
    Type: Application
    Filed: December 18, 2006
    Publication date: July 5, 2007
    Applicant: SAGEM DEFENSE SECURITE
    Inventor: Michel Nollet
  • Method of Reading Gaming Documents in a Gaming Terminal, and a Set of Gaming Elements for Implementing the Method
    Publication number: 20070155498
    Abstract: The invention relates to reading gaming documents in a gaming terminal suitable for reading two types of document: rectangular gaming grids on which information is printed in lines parallel to the edge for presentation to an insertion window, and elongate rectangular gaming receipts of varying lengths on which information is printed in lines parallel to the short side; the gaming receipts are presented to the window with their long sides in the prone position; they possess a characteristic different from that of the gaming grids and suitable for being detected in the terminal so as to enable presented documents to be identified as gaming receipts rather than gaming grids; the detected data read parallel to the long side of a receipt is converted into real data corresponding to information printed on the receipt in lines parallel to the short side.
    Type: Application
    Filed: December 18, 2006
    Publication date: July 5, 2007
    Applicant: SAGEM DEFENSE SECURITE
    Inventors: Xavier Chaussade, Jean Lallemant
  • Method of managing the supply of electrical power, an electrical power supply circuit, and a method of powering an appliance when cold
    Publication number: 20070152634
    Abstract: The present invention relates to a method of managing a supply of electrical power to an appliance that is delivered by means of at least a first battery and a second battery, said method comprising the following steps: powering the appliance by means of the first battery so long as said first battery has a level of charge sufficient for powering the appliance; when the battery has a level of charge that is insufficient, powering the appliance by means of the second battery; and powering the appliance with both of the batteries in parallel when the levels of charge of both batteries are substantially equal and insufficient for it to be possible to power the appliance using a single one of the batteries. The invention also relates to an electrical power supply circuit for implementing said method, and to a method of powering an appliance when cold.
    Type: Application
    Filed: December 21, 2006
    Publication date: July 5, 2007
    Applicant: SAGEM DEFENSE SECURITE
    Inventor: Michel Nollet
  • Changer of Spherical Field
    Publication number: 20070154196
    Abstract: Field changer device (4) comprising: a rotary magazine (5) of spherical general shape mounted so as to rotate about a rotation axis (R) coincident with an axis of symmetry of the magazine (5), which is inclined to a fixed principal optical axis (X); and at least three optical channels (A, B, C) provided in said magazine (5) and having concurrent respective optical axes (XA, XB, XC) inclined at the same angle (?) to the rotation axis (R), it being possible for said magazine (5) to rotate about its rotation axis (R) through predetermined rotation angles (?1, ?2, ?3) in order to place each of the optical channels (A, B, C) alternately along the principal optical axis (X), the optical channels (A, B, C) being arranged in the magazine (5) in such a way that at least two of the rotation angles (?1, ?2, ?3) of the magazine (5) are different.
    Type: Application
    Filed: December 6, 2006
    Publication date: July 5, 2007
    Applicant: SAGEM DEFENSE SECURITE
    Inventors: Anthony Brugier, Rodolphe Pierrois
  • Method of compensating anisotropy in a vibrating-bell inertial rotation sensor
    Patent number: 7222513
    Abstract: The method serves to compensates anisotropy in an inertial rotation sensor comprising a metallized vibrating bell (1) having a bias voltage applied thereto, the vibrating bell (1) having an edge (7) electrodes (5.1, 5.2), and the method comprises the steps of measuring, preferably by multiplexing, the anisotropy between the electrodes and of applying to the electrodes a fraction of the bias voltage that depends on the differences measured between the electrodes.
    Type: Grant
    Filed: December 9, 2004
    Date of Patent: May 29, 2007
    Assignee: Sagem SA
    Inventors: Jean-Michel Caron, Vincent Ragot, Alain Renault, Alain Jeanroy
  • Device for printing on a strip of paper in the form of a roll about a spool
    Publication number: 20070091159
    Abstract: A device for printing on a strip of paper shaped as a roll about a spool, the device comprising a housing for receiving the roll, means for supporting the roll from beneath in the housing and for horizontally centering the roll substantially on a vertical reference axis, a travel path for the strip of paper from the housing to a printer member, and a control member associated with a drive member for driving the strip of paper along the travel path, the device comprises at least one sensor for sensing the position of the spool along the vertical reference axis, the sensor being secured to at least one side face of the housing, and being connected to the control member for controlling the drive member.
    Type: Application
    Filed: October 12, 2006
    Publication date: April 26, 2007
    Applicant: SAGEM DEFENSE SECURITE
    Inventors: Xavier Chaussade, Francois Dufresne De Virel, Jean-Francois Lallemant
  • Ventilation system for electrical of electronic equipment
    Patent number: 7209350
    Abstract: A ventilation system for electrical or electronic equipment installed in an enclosure of a box having an air inlet and an air outlet for establishing a flow of air through said enclosure, the ventilation system having at least two air suction sources, namely a primary source and a secondary source, and a chest for mounting on said box beside the air outlet, said chest defining at least two separate cavities, both for connection to the air outlet, namely a primary cavity connected to the primary source, and a secondary cavity connected to the secondary source, in such a manner as to create two separate air exhaust circuits from the outlet of the enclosure.
    Type: Grant
    Filed: December 3, 2004
    Date of Patent: April 24, 2007
    Assignee: Sagem SA
    Inventors: Etienne Merlet, Jean-Eric Besold
  • Valve control device
    Patent number: 7205704
    Abstract: The invention relates to a device for displacing a moving part along a longitudinal axis relative to a housing, said device being symmetrical about a plane extending longitudinally relative to the moving part, the device comprising two structures that are secured to said moving part and elements of active material comprising at least two blocks extending between inside walls of each structure, with the elongation directions of the blocks being antisymmetrical about an axis substantially perpendicular to the displacement axis of the moving part, wherein the structures are flexible and suitable for displacing the moving part by deforming as a function of the elongation of the blocks.
    Type: Grant
    Filed: January 31, 2006
    Date of Patent: April 17, 2007
    Assignee: Sagem Defense Securite
    Inventors: Jean Thierry Audren, Etienne Merlet, Jérôme Meleard, Charles Mangeot
  • Method and device for video projection
    Publication number: 20070073843
    Abstract: The invention relates to a video projection device, comprising at least one terminal with the video data for projection, a server and a projector, said server, being connected to the projector by a hard-wire connection and accessible from a communication network, characterised in that the terminal may be connected, by means of the network and a network access processor, to a website hosted by the server, to download a file with an .ocx extension, comprising a remote control programme for the projection with an interface (ActiveX), the running of which by the network access processor permits the projection, by a video programme suitable for the projector, of the video data displayed on the screen of the terminal.
    Type: Application
    Filed: November 19, 2004
    Publication date: March 29, 2007
    Applicant: SAGEM COMMUNICATION
    Inventor: Jean-Thomas Ferreri
  • Inertial sensor with disturbing current reduced by reducing the width and the spacing of tracks in critical zones
    Publication number: 20070022812
    Abstract: The inertial sensor comprises a piezoelectric plate having a vibrator member defined therein that carries excitation electrodes connected to an excitation circuit comprising conductor tracks carried by the piezoelectric plate, the excitation circuit including a disturbing circuit portion in which two conductor tracks extend on either side of a midplane and present a width less than 50 ?m, and preferably equal to 10 ?m, and are spaced apart by a distance of less than 100 ?m, and preferably equal to 40 ?m.
    Type: Application
    Filed: June 30, 2006
    Publication date: February 1, 2007
    Applicant: SAGEM DEFENSE SECURITE
    Inventors: Raphael Brisson, Paul Featonby
  • Vibration motor primary flight control actuator
    Patent number: 7165746
    Abstract: The invention provides an actuator for a control surface (7), in particular for a primary flight control of an aircraft, the actuator including a main actuator (3) in a main control line (1) for actuating the control surface (7), the actuator being characterized in that the actuator of the main control line (1) comprises a motor of the vibration motor type, and in that it further comprises, in a compensation, secondary control line (2), a compensation actuator (4) and spring-forming apparatus (5) interposed between the compensation actuator (4) and the control surface (7), the compensation actuator (4) tensioning or compressing the spring-forming apparatus so as to make them suitable for delivering a mean force to the control surface (7) so as to off-load from the main actuator (3) the mean force that it needs to deliver to the flight control (7).
    Type: Grant
    Filed: June 7, 2002
    Date of Patent: January 23, 2007
    Assignee: Sagem SA
    Inventor: Jean Thierry Audren
  • Internal sensor with disturbing current reduced by compensation branches
    Publication number: 20070013364
    Abstract: The inertial sensor comprises a piezoelectric plate having a vibrator member defined therein carrying excitation electrodes connected to an excitation circuit including conductor tracks carried by the piezoelectric plate the excitation circuit including a disturbing circuit portion in which the excitation circuit has compensation branches associated with corresponding disturbing conductor track portions, each compensation branch having one end connected to the corresponding disturbing conductor track portion and extending on a side of the midplane that is opposite from the side on which the corresponding disturbing conductor track portion extends.
    Type: Application
    Filed: June 30, 2006
    Publication date: January 18, 2007
    Applicant: SAGEM DEFENSE SECURITE
    Inventors: Raphael Brisson, Paul Featonby