Patents Assigned to L-3 Communications
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Patent number: 8137796Abstract: 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: GrantFiled: August 8, 2008Date of Patent: March 20, 2012Assignee: L-3 Communications CyTerra CorporationInventors: Ravi K. Konduri, Neil Alan Stewart, Edward E. A. Bromberg, Yarelis M. Rios, David H. Fine, John M. Oelschlaeger, Mark Fraser
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Patent number: 8136340Abstract: 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: GrantFiled: August 5, 2010Date of Patent: March 20, 2012Assignee: L-3 Communications Electron Technologies, Inc.Inventor: Stephen L. Hart
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Patent number: 8140001Abstract: 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: GrantFiled: March 7, 2007Date of Patent: March 20, 2012Assignee: L-3 Communications CorporationInventor: James D. Haverty
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Patent number: 8137446Abstract: 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: GrantFiled: March 12, 2008Date of Patent: March 20, 2012Assignee: L-3 Communications Security and Detection Systems, Inc.Inventors: Thomas D. Plamondon, Nikolay Rolshud, Peter F. Cram, Mark Fraser
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Publication number: 20120062407Abstract: 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: ApplicationFiled: November 18, 2008Publication date: March 15, 2012Applicant: L-3 Communications CyTerra CorporationInventors: Daniel J. O'Donnell, Donald Wright, Debra D. Weber
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Patent number: 8130680Abstract: 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: GrantFiled: January 24, 2008Date of Patent: March 6, 2012Assignee: L-3 Communications, Corp.Inventors: William K. McIntire, Larry S. Thomson, David H. Robbins
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Patent number: 8129910Abstract: 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: GrantFiled: June 23, 2009Date of Patent: March 6, 2012Assignee: L-3 Communications CorporationInventors: David Riley Whaley, Ramon Duggal, Carter Michael Armstrong
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Publication number: 20120053915Abstract: 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: ApplicationFiled: July 26, 2011Publication date: March 1, 2012Applicant: L-3 Communications CorporationInventors: Mark Falash, Eytan Pollak, Yushan Chen, Jon Williams
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Patent number: 8121752Abstract: 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: GrantFiled: May 8, 2008Date of Patent: February 21, 2012Assignee: L-3 Communications CoporationInventors: Michael Winterhalter, Endre Berecz
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Patent number: 8121222Abstract: 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: GrantFiled: June 23, 2008Date of Patent: February 21, 2012Assignee: L-3 Communications Integrated Systems L.P.Inventors: Frank A. Boyle, Gerald L. Fudge, Chen-Chu A. Yeh
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Patent number: 8117009Abstract: 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: GrantFiled: July 30, 2008Date of Patent: February 14, 2012Assignee: L-3 CommunicationsInventors: Marc Worthington, Noah Desch, David Lawson, Scott Colegrove
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Patent number: 8109075Abstract: 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: GrantFiled: August 5, 2010Date of Patent: February 7, 2012Assignee: L-3 Communications Electron Technologies, Inc.Inventor: Stephen L. Hart
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Patent number: 8106365Abstract: 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: GrantFiled: April 17, 2009Date of Patent: January 31, 2012Assignee: L-3 Communications Security and Detection Systems, Inc.Inventors: David Perticone, Vitaliy Ziskin
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Patent number: 8107257Abstract: 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: GrantFiled: May 4, 2009Date of Patent: January 31, 2012Assignee: L-3 Communications Avionics Systems, Inc.Inventors: Joseph W. Moorehead, Jr., James A. Krist
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Patent number: 8107982Abstract: 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: GrantFiled: May 10, 2011Date of Patent: January 31, 2012Assignee: L-3 Communications, Corp.Inventors: Thomas R. Giallorenzi, Christopher Jensen, Jason Woosuk Lee, James Dyal, Larry S. Thomson
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Patent number: 8102897Abstract: 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: GrantFiled: January 28, 2009Date of Patent: January 24, 2012Assignee: L-3 Communications, Corp.Inventors: Vaughn L. Mower, Merle L. Keller, Kent R. Bruening
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Publication number: 20120007869Abstract: 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: ApplicationFiled: July 26, 2011Publication date: January 12, 2012Applicant: L-3 Communications CorporationInventors: Mark Falash, Eytan Pollak, Yushan Chen, Jon Williams
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Publication number: 20120008746Abstract: 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: ApplicationFiled: September 19, 2011Publication date: January 12, 2012Applicant: L-3 Communications Security and Detection Systems, Inc.Inventors: Boris Oreper, Douglas P. Boyd, Nikolay Rolshud
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Patent number: 8093992Abstract: 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: GrantFiled: October 23, 2008Date of Patent: January 10, 2012Assignee: L-3 Communications Insight Technology IncorporatedInventors: Dale Allen Jancic, Paul Joseph Deyeso
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Patent number: 8095859Abstract: 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: GrantFiled: January 9, 2008Date of Patent: January 10, 2012Assignee: L-3 Communications, Corp.Inventors: Justin C. Peterson, Steven O. Hadfield, Ryan Hinton