Patents Assigned to L-3 Communications
  • Patent number: 8137796
    Abstract: A particle-harvesting material includes a flexible, reusable, and thermally conductive material including a rough surface having dimples of a size within a first range of sizes, a microstructure including interstices of a second range of sizes, the second range of sizes including sizes smaller than the first range of sizes, and an etched portion on the rough surface configured to attract particles upon contact between the particles and the etched portion.
    Type: Grant
    Filed: August 8, 2008
    Date of Patent: March 20, 2012
    Assignee: L-3 Communications CyTerra Corporation
    Inventors: Ravi K. Konduri, Neil Alan Stewart, Edward E. A. Bromberg, Yarelis M. Rios, David H. Fine, John M. Oelschlaeger, Mark Fraser
  • Patent number: 8136340
    Abstract: A high voltage propellant isolator includes at least two different types of isolator rings or segments, in alternating lateral arrangement, that direct the flow of propellant, such as xenon gas, in a tortuous path through the isolator.
    Type: Grant
    Filed: August 5, 2010
    Date of Patent: March 20, 2012
    Assignee: L-3 Communications Electron Technologies, Inc.
    Inventor: Stephen L. Hart
  • Patent number: 8140001
    Abstract: Techniques for detecting wireless devices that are signaling in high proximity to a convoy or other operation and preventing messages from reaching the wireless devices. One class of the techniques uses surgical jamming methodologies that minimize power consumption and collateral interference, while being maximally inconspicuous; another class uses baiting beacons to prevent the messages from reaching the wireless devices. Still another class of techniques denies wireless devices access to a wireless network. An exemplary embodiment applies the techniques to wireless devices and beacons in a GSM network.
    Type: Grant
    Filed: March 7, 2007
    Date of Patent: March 20, 2012
    Assignee: L-3 Communications Corporation
    Inventor: James D. Haverty
  • Patent number: 8137446
    Abstract: Concentrating particles in a turbulent gas flow may include receiving, in a receptacle, a turbulent gas flow that includes particles. The concentration of particles in a gas flow exiting the receptacle at a first port is increased as compared with a concentration of the particles in the gas flow received by the receptacle. The increased concentration of particles is accomplished by removing a portion of the gas flow by using a second port, and fluidly communicating the gas flow through a tube in the receptacle. The tube has a smaller diameter at the end of the tube at which the gas flow exits the tube than diameter at the end of the tube at which the gas flow is received.
    Type: Grant
    Filed: March 12, 2008
    Date of Patent: March 20, 2012
    Assignee: L-3 Communications Security and Detection Systems, Inc.
    Inventors: Thomas D. Plamondon, Nikolay Rolshud, Peter F. Cram, Mark Fraser
  • Publication number: 20120062407
    Abstract: An explosive detection system includes an unmanned vehicle and a manned vehicle. The unmanned vehicle includes a reflector. The manned vehicle includes a ground penetrating radar. The manned vehicle also includes electronics configured to process radar signals that are reflected by the reflector to detect an explosive device. The manned vehicle follows the unmanned vehicle.
    Type: Application
    Filed: November 18, 2008
    Publication date: March 15, 2012
    Applicant: L-3 Communications CyTerra Corporation
    Inventors: Daniel J. O'Donnell, Donald Wright, Debra D. Weber
  • Patent number: 8130680
    Abstract: A method for timing a full duplex pulsed wireless communication system between first and second transceivers is disclosed. At least one of the transceivers is mobile. A propagation time between the first and second transceivers is calculated. A pulse period of the first transceiver is set to be twice the propagation time divided by an integer. The second transceiver's pulse period is set to be equal to the pulse period of the first transceiver to enable the first and second transceivers to transmit and receive pulses with a substantially reduced risk of a collision between pulses transmitted from the first and second transceivers.
    Type: Grant
    Filed: January 24, 2008
    Date of Patent: March 6, 2012
    Assignee: L-3 Communications, Corp.
    Inventors: William K. McIntire, Larry S. Thomson, David H. Robbins
  • Patent number: 8129910
    Abstract: A system and method of magnetically insulating the cathode of a cold-cathode electron gun is achieved. A strong magnetic field is applied in the vicinity of the cold cathode to deflect and constrain the flow of electrons emitted from structures within the electron gun. The magnetic field largely prevents re-reflected primary and secondary electrons from reaching the cathode, thereby improving the operation and increasing the life of the cold-cathode electron gun. In addition, the insulating magnetic field improves electron beam focusing and enables a reduction in the magnitude of static electric focusing fields employed in the vicinity of the cold cathode, further reducing the electron gun's susceptibility to destructive arcing.
    Type: Grant
    Filed: June 23, 2009
    Date of Patent: March 6, 2012
    Assignee: L-3 Communications Corporation
    Inventors: David Riley Whaley, Ramon Duggal, Carter Michael Armstrong
  • Publication number: 20120053915
    Abstract: A distributed simulation system is composed of simulator stations linked over a network that each renders real-time video imagery for its user from scene data stored in its data storage. The simulation stations are each connected with a physics farm that manages the virtual objects in the shared virtual environment based on their physical attribute data using physics engines, including an engine at each simulation station. The physics engines of the physics farm are assigned virtual objects so as to reduce the effects of latency, to ensure fair fight requirements of the system, and, where the simulation is of a vehicle, to accurately model the ownship of the user at the station. A synchronizer system is also provided that allows for action of simulated entities relying on localized closed loop controls to cause the entities to meet specific goal points at specified system time points.
    Type: Application
    Filed: July 26, 2011
    Publication date: March 1, 2012
    Applicant: L-3 Communications Corporation
    Inventors: Mark Falash, Eytan Pollak, Yushan Chen, Jon Williams
  • Patent number: 8121752
    Abstract: A flight recorder includes an information input device, heat sensitive memory device electrically connected to the information input device, and housing enclosing the heat sensitive memory device. The housing is made with a first material and having a plurality of openings made through the housing. A sacrificial material is disposed between the housing and heat sensitive memory device. The sacrificial material having a lower melting temperature than the first material such that the sacrificial material changes state and egresses through the openings in the housing when exposed to heat to create an air gap between the housing and heat sensitive memory device. The first material includes nickel and the sacrificial material includes aluminum. A heat insulating layer is disposed between the sacrificial material and heat sensitive memory device. A second sacrificial material is disposed between the heat insulating layer and heat sensitive memory device.
    Type: Grant
    Filed: May 8, 2008
    Date of Patent: February 21, 2012
    Assignee: L-3 Communications Coporation
    Inventors: Michael Winterhalter, Endre Berecz
  • Patent number: 8121222
    Abstract: Systems and methods for detecting and/or identifying signals that employ streaming processing to generate time-frequency surfaces by sampling a datastream according to a temporal structure that may be chosen as needed. The sampled datastream may be correlated with a set of templates that span the band of interest in a continuous manner, and used to generate time-frequency surfaces from irregularly sampled data with arbitrary structure that has been sampled with non-constant and non-Nyquist sampling rates where such non-constant rates are needed or desired.
    Type: Grant
    Filed: June 23, 2008
    Date of Patent: February 21, 2012
    Assignee: L-3 Communications Integrated Systems L.P.
    Inventors: Frank A. Boyle, Gerald L. Fudge, Chen-Chu A. Yeh
  • Patent number: 8117009
    Abstract: Disclosed is a data recorder for munitions. The data recorder includes a power source, a processor, and an acceleration sensor. The data recorder further includes a trigger validation feature which is operably coupled to the data recorder to verify the occurrence of a secondary environmental/input event. This envisioned data recorder can contain a digital or analog device as a primary or secondary trigger. Data from an accelerometer is stored in FRAM memory.
    Type: Grant
    Filed: July 30, 2008
    Date of Patent: February 14, 2012
    Assignee: L-3 Communications
    Inventors: Marc Worthington, Noah Desch, David Lawson, Scott Colegrove
  • Patent number: 8109075
    Abstract: A high voltage propellant isolator includes at least two different types of isolator rings or segments, in alternating lateral arrangement, that direct the flow of propellant, such as xenon gas, in a tortuous path through the isolator.
    Type: Grant
    Filed: August 5, 2010
    Date of Patent: February 7, 2012
    Assignee: L-3 Communications Electron Technologies, Inc.
    Inventor: Stephen L. Hart
  • Patent number: 8106365
    Abstract: Fissionable materials are distinguished from other high-effective atomic number materials by producing dual-energy x-ray radiation sufficient to cause fission in fissionable materials and directing the dual-energy x-ray radiation sufficient to cause fission in fissionable materials towards a physical region. X-ray radiation and a product of fission from the physical region are sensed. An absorption of the dual-energy x-ray radiation by the physical region is determined based on the sensed x-ray radiation, and whether the physical region includes fissionable material is determined based on the presence of a product of fission.
    Type: Grant
    Filed: April 17, 2009
    Date of Patent: January 31, 2012
    Assignee: L-3 Communications Security and Detection Systems, Inc.
    Inventors: David Perticone, Vitaliy Ziskin
  • Patent number: 8107257
    Abstract: An electronic assembly retaining system provides a secure mount for an electronic assembly, such as an avionics assembly, while being lockable and releasable via manual rotation of a single retainer stem that may be positioned in a readily-accessible location. The retainer stem may include threaded shaft and a detent system to resist inadvertent rotation of the stem. The system includes a housing that at least partially encloses the electronic assembly and which includes a receiving element for receiving a distal end portion of the retainer stem, which is movable between engaging and disengaging positions.
    Type: Grant
    Filed: May 4, 2009
    Date of Patent: January 31, 2012
    Assignee: L-3 Communications Avionics Systems, Inc.
    Inventors: Joseph W. Moorehead, Jr., James A. Krist
  • Patent number: 8107982
    Abstract: Entry of a terminal into a wireless communications network is facilitated for terminals which may operate in either frequency-division duplex or time-division duplex mode. Join request messages transmitted by the terminals include a duplex capability indicator defining a carrier frequency which can be used to response to the terminals.
    Type: Grant
    Filed: May 10, 2011
    Date of Patent: January 31, 2012
    Assignee: L-3 Communications, Corp.
    Inventors: Thomas R. Giallorenzi, Christopher Jensen, Jason Woosuk Lee, James Dyal, Larry S. Thomson
  • Patent number: 8102897
    Abstract: Direct sequence spread spectrum communications can use composite codes and can operate at a plurality of different chipping rates. The composite codes can be formed using a plurality of component codes, wherein the component codes can be relatively prime and at least one of the nominal lengths of the component codes can include a plurality of prime number multiplicands. The chipping rate and code length can be reduced by dividing a master rate by one or more of the prime number multiplicands. Symbol timing and time division multiple access timing can be tied to epochs of the component codes.
    Type: Grant
    Filed: January 28, 2009
    Date of Patent: January 24, 2012
    Assignee: L-3 Communications, Corp.
    Inventors: Vaughn L. Mower, Merle L. Keller, Kent R. Bruening
  • Publication number: 20120007869
    Abstract: A distributed simulation system is composed of simulator stations linked over a network that each renders real-time video imagery for its user from scene data stored in its data storage. The simulation stations are each connected with a physics farm that manages the virtual objects in the shared virtual environment based on their physical attribute data using physics engines, including an engine at each simulation station. The physics engines of the physics farm are assigned virtual objects so as to reduce the effects of latency, to ensure fair fight requirements of the system, and, where the simulation is of a vehicle, to accurately model the ownship of the user at the station. A synchronizer system is also provided that allows for action of simulated entities relying on localized closed loop controls to cause the entities to meet specific goal points at specified system time points.
    Type: Application
    Filed: July 26, 2011
    Publication date: January 12, 2012
    Applicant: L-3 Communications Corporation
    Inventors: Mark Falash, Eytan Pollak, Yushan Chen, Jon Williams
  • Publication number: 20120008746
    Abstract: A property of a treatment beam is controlled during a scanning period. A portion of a region is exposed to an imaging x-ray beam during a scanning period, the imaging x-ray beam being generated by an electron-beam scanner. X-ray radiation from the region is detected, the x-ray radiation representing an attenuation of the imaging x-ray beam caused by the portion of the region. A first image of the portion of the region is generated based on the detected x-ray radiation. A characteristic of the portion of the region is determined from the generated first image. An input derived from the characteristic is generated, the input configured to cause a source of a treatment beam to modify a property of the treatment beam. The source of the treatment beam modifies a property of the treatment beam during the scanning period by providing the input to the source of the treatment beam.
    Type: Application
    Filed: September 19, 2011
    Publication date: January 12, 2012
    Applicant: L-3 Communications Security and Detection Systems, Inc.
    Inventors: Boris Oreper, Douglas P. Boyd, Nikolay Rolshud
  • Patent number: 8093992
    Abstract: A system and method related to weapon mounted auxiliary devices that can be operated by wireless remote control, and a remote controller by which an operator can operate the auxiliary devices remotely by wireless control. This includes all means of remote control of the auxiliary devices to include but not be limited to radio frequency (RF), infrared (IR) energy, all other wavelengths of the electromagnetic spectrum, and acoustic, pressure, or sound waves. Control of the auxiliary devices can range from simple activation to wireless control of all auxiliary device controls and adjustments. This can also include a single remote control device that can operate one or more weapon mounted auxiliary devices.
    Type: Grant
    Filed: October 23, 2008
    Date of Patent: January 10, 2012
    Assignee: L-3 Communications Insight Technology Incorporated
    Inventors: Dale Allen Jancic, Paul Joseph Deyeso
  • Patent number: 8095859
    Abstract: Encoding of a low-density parity check code uses a block-circulant encoding matrix built from circulant matrices. Encoding can include partitioning data into a plurality of data segments. The data segments are each circularly rotated. A plurality of XOR summations are formed for each rotation of the data segments to produce output symbols. The XOR summations use data from the data segments defined by the circulant matrices. Output symbols are produced in parallel for each rotation of the data segments.
    Type: Grant
    Filed: January 9, 2008
    Date of Patent: January 10, 2012
    Assignee: L-3 Communications, Corp.
    Inventors: Justin C. Peterson, Steven O. Hadfield, Ryan Hinton