Matches 151 - 200 out of 253 < 1 2 3 4 5 6 >
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5432750 Vertical array deployment device  
A deployment system is disclosed for deploying a vertical, sub-surface bud, underwater acoustic sensor array in the ocean which includes a mechanical load transfer and cable separation mechanism...
5425001 Navigation system for an underwater vehicle  
A method and apparatus for navigating underwater a killer vehicle towards a mine emitting a magnetic field by using measurements of the mine's magnetic field, by two magnetic sensors affixed to the...
5425000 Spatial rejection of direct blast interference in multistatic sonars  
A multistatic sonar system (50) employing a short duration automatic gain control (AGC) following beamforming of the return signal to reject spatial transients at the sonar waveform leading and...
5420828 Viewing screen assembly  
A viewing screen apparatus for helmets or face masks of the type having a viewing area covered by a face plate is disclosed. The apparatus includes an enclosure adapted to be mounted on a helmet or...
5414675 Sonar system for detection of near bottom targets  
Target detection apparatus wherein a pulse of acoustic energy transmitted toward a target area of the sea bottom is reflected back to two spaced-apart receiver transducers. The sum and difference...
5412622 Apparatus for discriminating sound sources in a water environment  
This invention provides an apparatus including a plurality of omnidirectional hydrophone sensors in a particularly configured array comprised of ring members which are carried between a plurality...
5392256 Magneto-acoustic signal conditioner  
An apparatus for enhancing the signal to noise ratio of piezoelectric hydhone outputs by decoupling the turbulent velocity pressure noise from the imbedded acoustic signal. An electromagnetic...
5377164 Method to operate with a wire-guided, in air or water, movable vehicle and a device for carrying out the method  
One embodiment that is shown relates to a reconnaissance and/or weapons system for underwater use and comprises a vehicle 1, which may be a torpedo, and a support 2. The support is connected with...
5377163 Active broadband acoustic method and apparatus for identifying aquatic life  
The identity of an aquatic organism is determined by a signature derived from a broadband acoustic signal transmitted and received by a broadband transducer or transmitted by a an broadband...
5309410 Tuned circuit for sonar beam pattern optimization  
A sonar system using closely spaced or interleaved projector and receiving transducer elements with a power inductor connected in series with the projector array transmits three separate...
5274607 Pool monitor  
The present invention shows a system for the continuous echo analysis of a body of liquid, surrounded by walls of known dimension, for the presence of an object. Such a system comprises: a...
5274608 Sonar transducer  
A sonar transducer includes an electro-mechanical transducer coupled to a front mass and a back mass. Annular rings space a compliant diaphragm from the front mass, the diaphragm being in...
5267220 Target surveillance and destruct system  
A covert attacking swimmer is discovered and acquired by an echo-search aratus. Once acquired, a search and destruct vehicle type weapon is launched which seeks out the attacking swimmer and when...
5249162 Radio frequency phase sensitive wire detector  
An underwater object detection system and method are described which util changing phase relationships between radio waves received by a moving underwater receiver, via a retransmitting underwater...
5245588 Regenerative radio-frequency wire detector  
A regenerative radio-frequency wire detector is disclosed which incorpora a radio antenna and a radio receiver connected thereto. A radio transmitter is timely energized by an output signal from...
5243565 Method of measuring directional spectra of surface gravity waves  
A new method for measurement of the directional spectra of surface gravity (water) waves. Measurements are made at a single point by orthogonally mounted seismometers buried below the seabed...
5241516 Diver navigation system  
A diver navigation system which provides reliable position information to able a diver to locate and when required repair existing underwater devices such as cables, leg moorings and the like. The...
5214618 Method and arrangement for combating a submerged target object  
A method for combating a submerged target object through the intermediary of an active body which is deployable in an airborne mode, and which picks up a sonar contact with the target object from a...
5209226 Underwater respiratory device  
An air supply system which communicates between the compressed air supply and the mouth of a scuba diver utilizes a sealing cup which surrounds the mouth to define a breathing/microphone chamber...
5195060 Security system for swimming pools and like bodies of water  
An apparatus for detecting a person in a body of water includes a transmitter for generating an electrical swept frequency signal having a frequency that continuously varies between upper and lower...
5187690 Acoustic transducer system  
An acoustic transducer system employs a seawater return cable as a receiver lement. The cable is either open ended or short circuited with the seawater. A carrier frequency is applied at one end of...
5181254 Method for automatically identifying targets in sonar images  
To detect and classify features in a sonar image comprised of a matrix of pixels each pixel having a known greyness level a set of windows is defined such that each window is comprised of a set of...
5148412 Diver guidance method and system  
The present invention relates to a method and system for generating signals which represent a map that depicts one or more submerged objects within an underwater area; detecting acoustic energy...
5144285 Pulsed ultra sonic swimming pool alarm apparatus  
Pulsed ultrasonic apparatus for monitoring a swimming pool includes a transmitter housing securable to a child and provides a swept frequency pulsed output from a transducer within the housing when...
5126978 Undersea data collection, analysis, and display system  
A device and process is disclosed for creating detailed volumetric ocean els, which in turn are used as inputs for naval tactical and oceanographic analysis. Near-real-time volumetric modelling is...
5124955 Underwater communication system  
A digital underwater communication system includes a transmitter and a receiver. An oscillator bank in the transmitter generates a plurality of signals, each having a unique frequency. A timed...
5103431 Apparatus for detecting sonar signals embedded in noise  
Apparatus for detecting sonar signals embedded in noise includes a neural network trained to detect signals in response to the slope of amplitude rank ordered noise corrected powers. A detector...
5099457 Acoustic wave reflector capable of working under deep submersion  
In an acoustic wave reflector working in the sea, a sheet of air is set up between a reflecting plate and a perforated plate. This sheet of air forms a reflecting interface with the reflecting...
5079753 Diver orientation apparatus and method  
The present invention relates to a method and system for scanning a specified underwater area with sonar energy to generate sonar image signals of a submerged diver and othe objects within said...
5027333 Acoustic locator for elements of a flexible sonar array  
An acoustic array, useful for sonar, comprises a plurality of transducing ements which are free floating and not connected to each other. Means are provided for locating the position of each of the...
5022100 Apparatus and method for underwater acoustic receiving system installation in diving helmet  
An apparatus and method are provided for an underwater acoustic receiving stem installation in a deep-sea diving helmet. The present invention is directed to a modification of a diving helmet of...
5012452 Pulse transformation sonar  
A transducer projects bursts of ultrasonic energy having broadbandwidths stantially identical to the energy pulses transmitted by a porpoise or dolphin. Immediately prior to the projection of the...
5010529 Underwater transmitter apparatus  
Underwater signal apparatus includes a waterproof housing having two chambers, a sealed chamber in which is disposed a transducer and electrical circuitry associated with the transducer. In the...
5006845 Gas kick detector  
Methods for the early detection of gas kicks in marine risers (10) include monitoring a downhole absolute pressure and a downhole differential pressure of a riser section (11) positioned just above...
5003515 Submarine emergency communication transmitter  
An underwater acoustic transmitter adapted to be released from a submerged ubmarine to float towards the surface of the water and explode a plurality of signalling charges at a predetermined depth...
4996673 Underwater control system  
An underwater control system is disclosed. The system find particular applications in mosaic photographic and/or acoustic mapping of seabed or such marine studies, explorations, etc. A submersible...
4975890 Underwater sound transmitting system  
An underwater signalling device to fire explosives at a preselected depth a prearranged time sequence, which is intended to be part of an underwater sound communication system.
4972388 Electrical cable marker  
A marine mine control wire tagging system is disclosed as including a traitter and a receiver, a mobile underwater vehicle having a launcher mounted thereon, a radio frequency signal tag loaded in...
4970701 Wire detector  
Disclosed is a system for locating a wire that is partially submerged wit water and partially extends out thereof which includes a transmitter for broadcasting radio frequency electromagnetic...
4970702 Electrical conductor detecting device  
A sweep device for river mines of the command type is described. The device mploys two spaced, parallel blades which support the sweep device on the bottom of the river as it is towed therealong....
4932009 Apparatus and method for detecting swimmers  
An apparatus and allied method for detecting the presence of submerged, possibly distressed swimmers in a body of water employs a plurality of pairs of transducers arranged on opposite sides of the...
4894808 Flow noise reduction  
The level of signal noise caused by fluid flow at a pressure transducer, such as a hydrophone or geophone, is determined by measuring the electric field induced when the fluid flow through a...
4799825 Oil transfer system  
An underwater fuel transfer system for the transfer of liquid fuels such as crude oil from an off-shore underwater mooring to a submerged submarine oil tanker. There is provided a berthing guidance...
4757548 Speaker system and dome-shaped enclosure therefor  
A speaker system having a magnet and voice coil are mounted within a dome-shaped enclosure in such a way as to be capable of transmitting sonic vibrations and audio waves through a liquid medium or...
4683448 High sensitivity interferential electro-optical modulator  
High sensitivity interferential electro-optical modulator. The invention concerns an interferential electro-optical modulator. This modulator contains a Mach-Zehnder integrated interferometer in...
4683587 Submersible personal stereo  
Submersible personal stereo using a source, such as a radio, of stereo signals, a pair of sealed chambers housing a pair of electro-acoustic transducer and acoustic transmissive tubing for...
4653034 Remote monitor unit  
A remote monitor unit comprising a battery pack, a regulated power supply, program control board, a receiver AD board, a plurality of memory boards and a transducer, all housed in a water tight...
4639903 Underwater sound delivery system  
A sound transducer mounted inside a buoy for broadcasting sounds both underwater and above water. The buoy is a hollow sphere which admits water; but whose buoyancy is maintained by air-filled...
4509151 Marine acoustic analysis system and method  
An apparatus for locating, classifying and identifying underwater marine animals by means of the sounds they make includes an elongated submersible array adapted to be towed in various directions....
4480323 Remote self-contained undersea monitor  
A remote oceanographic data recording system which is self-contained batt operated and removably attachable to an external surface of a submerged hull without a need to penetrate said hull is...
Matches 151 - 200 out of 253 < 1 2 3 4 5 6 >