Search Patents
  • System for similar document detection
    Patent number: 8560546
    Abstract: A document is compared to the documents in a document collection using a hash algorithm and collection statistics to detect if the document is similar to any of the documents in the document collection.
    Type: Grant
    Filed: February 1, 2012
    Date of Patent: October 15, 2013
    Assignee: Alion Science and Technology Corporation
    Inventors: Ophir Frieder, Abdur R. Chowdhury
  • System for similar document detection
    Patent number: 7660819
    Abstract: A document is compared to the documents in a document collection using a hash algorithm and collection statistics to detect if the document is similar to any of the documents in the document collection.
    Type: Grant
    Filed: July 31, 2000
    Date of Patent: February 9, 2010
    Assignee: Alion Science and Technology Corporation
    Inventors: Ophir Frieder, Abdur R. Chowdhury
  • System for similar document detection
    Patent number: 8131724
    Abstract: A document is compared to the documents in a document collection using a hash algorithm and collection statistics to detect if the document is similar to any of the documents in the document collection.
    Type: Grant
    Filed: December 21, 2009
    Date of Patent: March 6, 2012
    Assignee: Alion Science and Technology Corporation
    Inventors: Ophir Frieder, Abdur R. Chowdhury
  • Integrated power system
    Patent number: 11196353
    Abstract: A power system is disclosed that includes a chassis configured to house one or more boards in which the boards are electrically coupled to one another. The boards are configured to receive external power and to output power using a plurality of different voltages. The boards are configured to receive power from at least one internal power source electrically coupled boards and to output power using a plurality of different voltages. The boards include one or more converters configured to convert power. The one or more converters are thermally interfaced with one or more portions of the chassis.
    Type: Grant
    Filed: February 12, 2021
    Date of Patent: December 7, 2021
    Assignee: Alion Science and Technology Corporation
    Inventors: Craig A. Keicher, Michael J. Harlow, Benjamin Craig
  • Integrated Power System
    Publication number: 20210184591
    Abstract: A power system is disclosed that includes a chassis configured to house one or more boards in which the boards are electrically coupled to one another. The boards are configured to receive external power and to output power using a plurality of different voltages. The boards are configured to receive power from at least one internal power source electrically coupled boards and to output power using a plurality of different voltages. The boards include one or more converters configured to convert power. The one or more converters are thermally interfaced with one or more portions of the chassis.
    Type: Application
    Filed: February 12, 2021
    Publication date: June 17, 2021
    Applicant: Alion Science and Technology Corporation
    Inventors: Craig A. Keicher, Michael J. Harlow, Benjamin Craig
  • Quasi-linear multi-state digital modulation through non-linear amplifier arrays
    Patent number: 6816008
    Abstract: At least one amplifier is selected from a first bank of non-linear amplifiers. At least one amplifier is selected from a second bank of non-linear amplifiers. The number of amplifiers selected from the first and second banks remains constant. Using the selected amplifiers, first and second components of a digital symbol are amplified using the first and second banks, respectively. The outputs produced by first and second banks are combined to produce an analog representation of the digital symbol.
    Type: Grant
    Filed: December 31, 2002
    Date of Patent: November 9, 2004
    Assignee: Alion Science and Technology Corporation
    Inventor: Kalle R. Kontson
  • Apparatus for and method of delivering visual image into air
    Publication number: 20080180798
    Abstract: An image projection system that communicates an image into the air includes screen material particles, a screen generation device, a delivery device and a light projecting system. The screen generation device disperses the screen material particles from the screen generation device at a targeted screen location, thereby forming a projection screen. The delivery device launches the screen generation device from a launch location to the targeted screen location in the air. The light projecting device projects light from a projection location onto the screen to form the image on the screen so as to be visible from an observation location of a viewer.
    Type: Application
    Filed: September 26, 2007
    Publication date: July 31, 2008
    Applicant: Alion Science and Technology Corporation
    Inventors: Michael Mitchell-Dignan, John A. Santini, Barry E. Mapen
  • Apparatus for and method of delivering visual image into air
    Patent number: 7710643
    Abstract: An image projection system that communicates an image into the air includes screen material particles, a screen generation device, a delivery device and a light projecting system. The screen generation device disperses the screen material particles from the screen generation device at a targeted screen location, thereby forming a projection screen. The delivery device launches the screen generation device from a launch location to the targeted screen location in the air. The light projecting device projects light from a projection location onto the screen to form the image on the screen so as to be visible from an observation location of a viewer.
    Type: Grant
    Filed: September 26, 2007
    Date of Patent: May 4, 2010
    Assignee: Alion Science and Technology Corporation
    Inventors: Michael Mitchell-Dignan, John A. Santini, Barry E. Mapen
  • Trailing edge blade clamp
    Publication number: 20090166498
    Abstract: A blade clamp for a helicopter blade having a width and leading and trailing edges includes a first clamping part, a first flexible liner attachable to the first clamping part, a second clamping part, a second flexible liner attachable to the second clamping part, a hinge mechanism to pivot the first clamping part and the first flexible liner with respect to the second clamping part and the second flexible liner and a connector provided opposite to the hinge mechanism. The flexible liners evenly distribute clamping force upon the blade clamp to prevent damage to the blade. The hinge mechanism allows the first and second clamping parts to open wide enough to safely and easily accommodate a helicopter blade during removal and installation of the blade.
    Type: Application
    Filed: December 28, 2007
    Publication date: July 2, 2009
    Applicant: Alion Science and Technology Corporation
    Inventors: Benjamin W. Anderson, Eric Peterson
  • Integrated Power System
    Publication number: 20200109686
    Abstract: A power system is disclosed that includes a chassis configured to house a first board, a second board, and a third board, in which the boards are electrically coupled to one another. The first board is configured to receive power and to output power at a first voltage and a second voltage. The second board is configured to receive power from the first board or at least one internal battery electrically coupled to the second board and to output power using at least two voltages. The third board is configured to receive power from the second board and to output power at two voltages. The boards include one or more converters configured to convert power. The one or more converters are thermally interfaced with one or more portions of the chassis so as to conduct heat into a respective portion of the chassis.
    Type: Application
    Filed: October 3, 2018
    Publication date: April 9, 2020
    Applicant: Alion Science and Technology Corporation
    Inventors: Craig A. Keicher, Michael J. Harlow
  • Trailing edge blade clamp
    Patent number: 7980522
    Abstract: A blade clamp for a helicopter blade having a width and leading and trailing edges includes a first clamping part, a first flexible liner attachable to the first clamping part, a second clamping part, a second flexible liner attachable to the second clamping part, a hinge mechanism to pivot the first clamping part and the first flexible liner with respect to the second clamping part and the second flexible liner and a connector provided opposite to the hinge mechanism. The flexible liners evenly distribute clamping force upon the blade clamp to prevent damage to the blade. The hinge mechanism allows the first and second clamping parts to open wide enough to safely and easily accommodate a helicopter blade during removal and installation of the blade.
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: July 19, 2011
    Assignee: Alion Science and Technology Corporation
    Inventors: Benjamin W. Anderson, Eric Peterson
  • Integrated power system
    Patent number: 10958070
    Abstract: A power system is disclosed that includes a chassis configured to house a first board, a second board, and a third board, in which the boards are electrically coupled to one another. The first board is configured to receive power and to output power at a first voltage and a second voltage. The second board is configured to receive power from the first board or at least one internal battery electrically coupled to the second board and to output power using at least two voltages. The third board is configured to receive power from the second board and to output power at two voltages. The boards include one or more converters configured to convert power. The one or more converters are thermally interfaced with one or more portions of the chassis so as to conduct heat into a respective portion of the chassis.
    Type: Grant
    Filed: October 3, 2018
    Date of Patent: March 23, 2021
    Assignee: Alion Science and Technology Corporation
    Inventors: Craig A Keicher, Michael J Harlow, Benjamin Craig
  • Surface effect sea train
    Publication number: 20080115992
    Abstract: A multiple unit surface effect vehicle movable through an aquatic environment is provided including connected units and lift fans. The multiple unit surface effect vehicle may further include a coupling system and/or a plurality of skirt portions connecting one of the connected units with another of the connected units. The multiple unit surface effect vehicle includes the connected units connected to form a continuous movable unit movable in an aquatic environment. Each connected unit includes a forced air containment chamber defined within each of the connected units. The forced air containment chambers of each of the connected units are connected to form a continuous pressurized air cushion. The lift fans force air into the forced air containment chamber to pressurize the continuous pressurized air cushion.
    Type: Application
    Filed: December 29, 2006
    Publication date: May 22, 2008
    Applicant: ALION SCIENCE AND TECHNOLOGY CORPORATION
    Inventors: Robert Scher, Weimin Hu
  • SURFACE EFFECT SEA TRAIN
    Publication number: 20100263955
    Abstract: A multiple unit surface effect vehicle movable through an aquatic environment is provided including connected units and lift fans. The multiple unit surface effect vehicle may further include a coupling system and/or a plurality of skirt portions connecting one of the connected units with another of the connected units. The multiple unit surface effect vehicle includes the connected units connected to form a continuous movable unit movable in an aquatic environment. Each connected unit includes a forced air containment chamber defined within each of the connected units. The forced air containment chambers of each of the connected units are connected to form a continuous pressurized air cushion. The lift fans force air into the forced air containment chamber to pressurize the continuous pressurized air cushion.
    Type: Application
    Filed: June 30, 2010
    Publication date: October 21, 2010
    Applicant: ALION SCIENCE AND TECHNOLOGY CORPORATION
    Inventors: Robert Scher, Weimin Hu
  • Helicopter blade folding apparatus
    Patent number: 10287009
    Abstract: The present invention relates to a blade folding apparatus that may incorporate an overhead blade lifting system that reduces binding loads on blade pins induced by blade weight and pitch, and a folding mechanism that removes the necessity of personnel with external guide-poles to rotate main rotor blades. The apparatus may include flap locks, an overhead lifting system support structure attached to the flap locks, and two blade support beams to create and support a lifting point near each blade's longitudinal and lateral center of gravity. The blade support beams may be fitted with an articulation mechanism that lifts and/or lowers the overhead lifting structure. The apparatus facilitates rapid folding of the main rotor blades, and, when used with blade clamping mechanisms, is capable of aiding in the removal and/or the re-installation of the main rotor blades without external lifting mechanisms.
    Type: Grant
    Filed: May 18, 2016
    Date of Patent: May 14, 2019
    Assignee: ALION SCIENCE AND TECHNOLOGY CORPORATION
    Inventors: Eric Peterson, Jeremiah Schweitzer, Zachary Anderson
  • System for editing and conversion of distributed simulation data for visualization
    Publication number: 20070146367
    Abstract: A simulation system for generating movie “scenes” that show interactions between simulated entities that populate a synthetic environment used to support training exercises and equipment. The simulation system includes a simulation engine that produces simulated entity state and event data; a visualization suite that allows an editor to display 2-D and 3-D views of the synthetic battlespace and to hear the battlefield and communications sounds associated with an interaction; a digital data logger that records simulation entity state and event data; an editing processor that provides the functionality required to identify, filter, specify, and organize the “scenes” that make up an interaction of interest; a “scene” generator that converts the entity state and event data for the set of scenes that make up an interaction into a digital movie file; and a repository for storage of complete movies and copying of movies to removable media.
    Type: Application
    Filed: November 14, 2006
    Publication date: June 28, 2007
    Applicant: Alion Science and Technology Corporation
    Inventor: Edward Harvey
  • Detection of biological warfare agents
    Patent number: 6838292
    Abstract: Methods and devices are provided for the detection of bacterial agents such agents as Bacillus anthracis and Clostridium botulinum with high sensitivity and selectivity. More specifically, methods and devices are based on a phosphorescence-emission detection system using chelate-stabilized lanthanides (e.g, Eu(III), Tb(III), and Sm(III)) to detect various spore-specific small organic molecules (e.g., dipicolinic acid, diaminopimelic acid, n-acetlymuramic acid, and the like). By careful selection of the chelating agent or ligand coordinated to the lanthanide, both high specificity and selectivity can be obtained. Examples of suitable and preferred sensor systems include N-(2-hydroxyethyl)ethylenediaminetriacetic acid (HEDTA) and N-(2-hydroxyethyl)iminodiacetic acid (HEIDA) combined with europium (III) and/or terbium (III). The chelate-stabilized lanthanides react with the spore-specific “target” molecules to form a characteristically phosphorescent product which can then be detected.
    Type: Grant
    Filed: April 14, 2000
    Date of Patent: January 4, 2005
    Assignee: Alion Science and Technology Corporation
    Inventors: Krishnaswamy S. Rajan, Stephen S. Mainer
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