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| Number | Title | Issue Date |
| 6580314 | Demodulation system and method for recovering a signal of interest from a modulated carrier sampled at two times the phase generated carrier frequency A demodulation system and method is used in a sensor system, such as a fiber optic sensor system, that senses optical signals and modulates a phase generated carrier having a carrier frequency ωc to form a modulated carrier. The modulated carr... | 06/17/2003 |
| 6502522 | Coil restraint device A coil restraint device for a torpedo mounted dispenser of a torpedo assembly is disclosed. The torpedo assembly includes at least a torpedo body, a longitudinal propulsion shaft housed within the torpedo body, and a torpedo mounted dispenser connected to... | 01/07/2003 |
| 6371002 | Detachable shock-absorbing ram-plate The detachable shock-absorbing ram-plate is used in a projectile launching system to mitigate launching impact forces and to prevent ram-plate re-strike during launch. The detachable shock-absorbing ram-plate is detachably coupled to the projectile using ... | 04/16/2002 |
| 6305309 | Attitude and roll stabilizer for towed undersea devices An attitude and roll stabilizer for towed undersea vehicles includes a vertical joining rod having an upper end and a lower end, a roll control weight mounted to the lower end of the vertical joining rod, an attitude control surface mounted to the upper e... | 10/23/2001 |
| 6308230 | Information/software interface having serial communications detection logic/electronics for determining either a host or an embedded microcomputer device controller connected thereto An improved communication interface for an embedded microcomputer device controller is provided. The interface includes serial communications detection logic/electronics for identifying the nature of external elements connected to the interface, and multi... | 10/23/2001 |
| 6304828 | System and method for calibrating a signal detection threshold circuit The system and method for calibrating a signal detection threshold circuit is used in a radio frequency (RF) receiver, such as a in an early warning radar (EWR) system, in which a signal detection threshold circuit rejects signals below a predetermined th... | 10/16/2001 |
| 6301192 | Method for generating 2 and 3-dimensional fluid meshes for structural/acoustic finite element analysis in infinite medium The present invention relates to a method for generating 2 and 3-dimensional fluid meshes for structural/acoustic finite element analysis in an infinite medium. The method broadly comprises the steps of: enclosing a structure to be analyzed in a block of ... | 10/09/2001 |
| 6288686 | Tapered direct fed quadrifilar helix antenna A quadrifilar helical antenna is provided having a feedpoint for the antenna connecting to individual helical antenna elements. Each antenna element tapers from a maximum width at the feedpoint to a minimum width. The tapered antenna elements provide impe... | 09/11/2001 |
| 6284990 | Bore rider switch A safety switch is provided to detect when a tube launched which exits the tube. The switch is located within the vehicle having a switch plunger extending to the periphery of the vehicle. The plunger is biased to provide outward pressure against a lever ... | 09/04/2001 |
| 6273711 | Low velocity detonation trap for monopropellant fuel systems A Low Velocity Detonation (LVD) trap having acceleration, detonation and High Velocity Detonation (HVD) trap zones. The primary function is to prevent the propagation of LVD explosions in monopropellant fuel systems from propagating to the fuel storage ta... | 08/14/2001 |
| 6268834 | Inductively shorted bicone antenna A bicone antenna that facilitates the passage of cables for at least one other radiating antenna. The bicone antenna has a plurality of inductive shorts spaced approximately one-quarter wavelength (at the cut-in frequency) from the antenna axis. Each indu... | 07/31/2001 |
| 6256263 | Acoustic sensing countermeasure device and method of determining a threat direction An acoustic sensing countermeasure device is used to sense the direction of a threat projectile or vehicle in addition to countering the threat with noise or interference signals. Countermeasure device includes an acoustic receive array comprised of segme... | 07/03/2001 |
| 6252822 | Countermeasure device with air bag hover system and pressure compensated acoustic projectors A countermeasure device which is supplied with air in order to actively compensate for external water pressure at any depth, is disclosed. The countermeasure includes an air bag hover system and one or more acoustic projectors, both of which are connected... | 06/26/2001 |
| 6228527 | Magnesium solution phase catholyte seawater electrochemical system In accordance with the present invention, an electrochemical system is provided which comprises a plurality of cells, the cells being formed by spaced apart bipolar electrodes. Each of the electrodes is formed by an anode portion formed from a magnesium c... | 05/08/2001 |
| 6223681 | REMUS positive lock securing apparatus The present invention is an apparatus for launching or retrieving a vessel. This apparatus includes a first vertical member having a top and a bottom end. A lower vessel engagement hook is positioned at the lower end of the vertical member. A second verti... | 05/01/2001 |
| 6211601 | Multi-tuned acoustic cylindrical projector A system and method for operating a cylindrical acoustic projector is provided which allows efficient operation of the projector over a wide bandwidth. The system and method use multiple power amplifiers each tuned to operate over separate and narrow band... | 04/03/2001 |
| 6188644 | Photon transducer In accordance with the present invention, a photon transducer system is provided for obtaining information on acoustic signals within a fluid environment. The photon transducer system uses a laser-based Doppler interferometer located within a pressure rel... | 02/13/2001 |
| 6177902 | Multi-function radio frequency signal warning system A multi-function radio frequency (RF) signal warning system detects different types of RF signals, such as radar signals, provided in various RF bands and provides an indication of the type of radar signal and the RF band. The system detects pulsed radar ... | 01/23/2001 |
| 6177863 | Audio alarm signal initiation device A device and method, which progressively and sequentially increases the volume of the alarm signal upon the initiation of the alarm, is provided. The disclosed device includes a multiple voltage-controlled oscillator, at least two dual-input positive-NAND... | 01/23/2001 |
| 6169520 | Plasma antenna with currents generated by opposed photon beams A plasma antenna with a plasma column is provided. Lasers are disposed to transmit photon beams through the plasma in an alternating, oppositely directed fashion. When a laser is energized, its laser beam produces photon-electron collisions that impart mo... | 01/02/2001 |
| 6155196 | Multi-depth acoustic signal generating device A simple mechanical device is provided which generates acoustic signals at ne or more specified depths. The device consists of a spring loaded piston placed in a wall of a housing, the spring loading biasing the piston away from the housing. The piston is ... | 12/05/2000 |
| 6155871 | Electric cable junction box assembly An electric cable junction box assembly includes a main body having a hole herethrough. A junction box main connector assembly is fixed in the hole and is provided with electrical leads adapted to receive a main cable end connector. A junction box secondar... | 12/05/2000 |
| 6154140 | Intelligent personal underwater monitoring device The present invention relates to an intelligent personal underwater monitng system which recognizes when a swimmer is in trouble and transmits a warning signal. The system comprises a device worn by the swimmer which senses water pressure and transmits a... | 11/28/2000 |
| 6148106 | Classification of images using a dictionary of compressed time-frequency atoms A method for automatically classifying test images based on their similares with a dictionary of example target and non-target images. The method operates by receiving a test image and then initializing variables for an iteration count and for the linear... | 11/14/2000 |
| 6146114 | Fluid pump and expandable energy storage device A fluid pump and expandable energy storage device includes a substantially igid circular band, a substantially rigid central hub, a membrane fixed to the band and to the hub, the membrane being enlargeable by a fluid introduced into the device, and a plura... | 11/14/2000 |
| 6142094 | Depth sensitive mechanical acoustic signal generating device A simple, mechanical device is provided which produces an acoustic signal a specified depth. The device consists of a shear plug in an exterior wall of the device housing which prevents the movement of a spring biased piston. The plug is subjected to inc... | 11/07/2000 |
| 6131530 | Two man loading platform for use on submarines A platform for servicing of vertically positioned missiles in a ballistic ssile submarine. The platform includes a vertically inclined rail and a horizontal frame. In the frame there is a first element having a first and a second end superimposed over the... | 10/17/2000 |
| 6133891 | Quadrifilar helix antenna A quadrifilar helical antenna is provided having feed points connected to e individual helical antenna elements through a spiral coupling path. The spiral coupling path additionally is wound contrarily to the winding of the helix. Moreover, each path has ... | 10/17/2000 |
| 6127983 | Wideband antenna for towed low-profile submarine buoy A wideband, low-profile, towable submarine antenna is provided. The antenna is formed with a metal cylinder having a longitudinal slot. The entire enna may be encapsulated in a tow body and towed horizontally on the surface of the water. The longitudina... | 10/03/2000 |
| 6122224 | Variable integration detection apparatus and method for multipath environments A receiver and method are disclosed that improves signal detection in a mipath environment wherein the desired reflected acoustic pulse is degraded by multipath reflections and embedded in noise. The invention provides a receiver that repetitively proces... | 09/19/2000 |
| 6118407 | Horizontal plasma antenna using plasma drift currents A horizontal plasma antenna is provided. An ionizer generates an ionizing am through a horizontal tube to form a bounded plasma column extending along a horizontal axis in a gravity field. An amplitude or frequency modulating signal is applied to Helmholt... | 09/12/2000 |
| 6118066 | Autonomous undersea platform The invention provides an unmanned, autonomous, undersea platform which ends the sphere of influence of a host vessel from which it is launched. The platform is hydrodynamically and stealth shaped to minimize noise, wake and detectability of the platform... | 09/12/2000 |
| 6118406 | Broadband direct fed phased array antenna comprising stacked patches A broadband phased antenna is comprised of multiple patches which are dirly feed. The multiple patches provide the broadband patch antenna having overlapping narrow frequency bands and comprise a ground-plane element, multiple antenna elements, multiple ... | 09/12/2000 |
| 6115681 | Real-time data acquisition A real-time data acquisition system for a remote, unmanned underwater vehe includes an array of sensors within the vehicle which gather data from the environment surrounding the vehicle. The sensor data is digitized and stored in an imbedded computer on ... | 09/05/2000 |
| 6111187 | Isolated compensated fluid delivery system An isolated compensated fluid delivery system is used in an underwater vel, such as a torpedo, to deliver a supply fluid such as fuel, while displacing the supply fluid with a compensating fluid to compensate for change in buoyancy of the underwater vess... | 08/29/2000 |
| 6106236 | Fluid conduit A fluid conduit for flowing electrically conductive fluids includes an elrically conductive pipe, an electrically conductive rod extending axially through the pipe and centrally thereof, a first power source in electrical communication with the pipe and ... | 08/22/2000 |
| 6104984 | Automated method of frequency determination in software metric data through the use of the multiple signal classification (MUSIC) algorithm In accordance with the present invention, a method for obtaining frequency nformation about a given data set is realized. The method comprises the steps of providing a processing unit; inputting a raw data set into the processing unit; optionally removing ... | 08/15/2000 |
| 6088297 | Acoustic sound speed profiling system An acoustic sound speed profiling system is provided. The system includes a sound emitter and a series of sensors or hydrophones spaced vertically in a water column. The sound emitter is a high-frequency sound source adap for mounting on the front end ... | 07/11/2000 |
| 6087993 | Plasma antenna with electro-optical modulator A plasma antenna is provided. An ionizer generates an ionizing beam in a nded or unbounded plasma column extending along a vertical axis. An amplitude or frequency modulating signal is applied to an electro-optical crystal that amplitude, phase, or frequ... | 07/11/2000 |
| 6087992 | Acoustically driven plasma antenna A plasma antenna with an acoustic modulator is provided. An ionizer produ a plasma in a horizontal tube to form a bounded plasma column extending along a longitudinal axis. An amplitude-, phase- or frequency-modulated signal is applied to an acoustic tra... | 07/11/2000 |
