Matches 151 - 200 out of 255 < 1 2 3 4 5 6 >


Match Document Document Title
4680584 Acoustic prelaunch weapon communication system  
The transmission of prelaunch weapon communication in a submarine is accoished without the use of an umbilical cord. Acoustic transducers transmit and receive acoustic data through water in place...
4679177 Underwater communication system  
An underwater communication system of the present invention comprises a transmitter including message inputting means having keys, each being assigned to each word, code converting means for...
4635242 Underwater signalling device  
A portable, self-contained underwater signalling device adapted to be worn by a diver. A waterproof housing has contained therein an acoustic sound generator, a power source and a three-position...
4604733 Apparatus for determining range and bearing  
Apparatus which provides both range and bearing information between a transponder and a transponder interrogator. The interrogator transmits an acoustic interrogating pulse which is received by...
4604737 Electronic diving apparatus  
An electronic diving apparatus detects pressure by means of a bellows transducer (12). A variable frequency oscillator (10) produces a variable frequency output in proportion to the pressure...
4563758 Underwater communicator  
An underwater communicator device (10) is disclosed which permits acoustic communication with another diver by use of a voice synthesizer (42) cooperating with an acoustic transducer (40). A...
4486861 Transponder telemetry  
Acoustic transponders are attached to sections of a submarine cable for use in accurately locating the cable during deployment or retrieval. An acoustic signal at one frequency, transmitted from...
4463452 Tracking and telemetry system for severe multipath acoustic channels  
A modulation/signal processing technique for acoustic communication in show water. Digital information is transmitted in a time expended version of frequency shift keying where a tone burst at a...
4446542 Oceanographic measurement system  
An acoustic ocean measuring system is disclosed which uses measurements of sound intensity to locate and measure ocean anomalies. Several free-floating sound pulse emitting floats are placed in...
4432079 Synchronous/asynchronous independent single sideband acoustic telemetry  
An undersea communications system provides for improved data transmission pabilities. Two separate sources of information respectively modulate the upper and the lower sidebands of an acoustic...
4428073 Underwater depth telemetry  
An acoustic telemetry system and technique are disclosed for remotely meaing the underwater depth and descent rate of a hydrographic package. Analog signals indicative of hydrostatic pressure...
4408488 Generalized drifting oceanographic sensor  
A generalized drifting oceanographic sensor (GDOS) is cast adrift in the oceanographic environment along a pre-programmed depth schedule. A variable buoyancy housing has one or more external...
4388710 Submarine cable tension telemetering system  
Apparatus for monitoring cable tension during submarine laying operations is housed in a separable case suitable for nondestructive attachment around the circumference of a cable at any desired...
4381428 Adaptive quantizer for acoustic binary information transmission  
An apparatus and technique reduces the data transmission rate required to ansmit acoustic signals from undersea sensors to remote monitoring locations without degrading the surveillance...
4349915 Minimization of multipath and doppler effects in radiant energy communication systems  
Apparatus is disclosed for reproducing transmitted information which is subject to multipath delay spread effects and doppler frequency-shift effects. The information is transmitted as a series of...
4335452 Electro-acoustic device for the underwater signalling and identification of a vessel  
The underwater signalling and identification device comprises an emitter (5) having four submerged transducers (10 to 13) arranged to form a square and fitted in a water-tight case (25) placed...
4324135 Speed indicator for fishing gear  
A water speed sensor suspended from a fishing boat at the depth fishing gear is being trolled actuates an underwater transducer to transmit a sonic signal detected by an underwater transducer...
4320473 Borehole acoustic telemetry clock synchronization system  
In a borehole telemetry system for acoustically transmitting data over a pipe suspended in a borehole, the level of noise in the data stream is inherently high, making the use of discrete...
4315326 Inertial measurement underwater tracking system  
An inertial measurement underwater tracking system which determines range sition onboard an underwater vehicle using inertial navigation techniques. The system uses acoustic telemetry to relay the...
4312054 Acoustic beacons  
Acoustic beacon for use at sea and having a pipe-shaped housing in the one nd of which is space for a battery which drives a transmitter disposed coaxially around the housing at the other end...
4305143 Automatic man overboard sensor and rescue system  
A system, which automatically or manually signals and senses the event of a person falling overboard from a vessel (12) into water (14), comprises a portable transmitter (16) coupled to a...
4283681 System for detecting an underwater buried cable  
A cable detecting system with a cable ship, a cable detector towed by said cable ship via a towing wire and said cable detector dredging the water bottom to find a buried cable, has been improved....
4276624 Acoustic transmission system  
An acoustic transmission system for a gaseous or liquid transmission medium, in which the transmitting apparatus double-sideband amplitude modulates a carrier with the signal to be transmitted,...
4213199 Acoustic data link  
An acoustic data link using the I-beam frame of a structure. The use of sl or aluminum framing permits a structure such as a ship to suffer damage in one section without loss of communication...
4210971 Long distance underwater communication  
1. A transmitter for use in long distance underwater communication comprig: (a) an electrostrictive transducer operable for radiating at least one hundred kilowatts of acoustic power into sea...
4208734 Underwater communication system  
1. In combination, means to generate a first noise signal having predetermined characteristics, means to generate a second noise signal having predetermined characteristics different from that of...
4203164 Secure sonar communication system  
A secure sonar communication system for transmitting and receiving intellnce signals within an aqueous medium comprising in combination means for generating an electrical pseudo random noise...
4203160 Submarine communication  
2. A method by which a submarine while deeply submerged in the sea may receive a message from a remote station without disclosing to others the position of the submarine, which comprises...
4189703 System for deploying a sensor array from transiting vessel  
A system for deploying a vertical linear sensor array from a transiting vessel comprising a tubular deployment case closed at the bottom by a descent weight that is connected to a plurality of...
4187491 Doppler compensated PSK signal processor  
A Doppler compensated PSK signal processor which receives a plurality of sages from a sensor array and decodes each message for further data processing. The signal processor compensates for the...
4186373 System for measuring in situ acoustic energy properties of ocean floor soils  
A hollow, projectile-shaped body containing an acoustical transducer is rased into the sea such that the body descends in free fall until it strikes and penetrates the sea floor, coming to a rest...
4180793 PSK pulse synthesizer  
A phase shift keyed (PSK) pulse synthesizer which is part of an acoustic transmitter located in an underwater vehicle to provide identification and tracking of the vehicle as well as telemetry...
4147222 Acoustical underwater communication system for command control and data  
An acoustic communication system is disclosed as a secondary means for command control of underwater operations from a surface unit. The system includes a diving acoustic command control unit for...
4119941 Acoustic coupler  
An acoustic coupler is provided for extending the listening and signal garing capabilities of an existing cable connected hydrophone system. The acoustic coupler includes a sensor, such as an...
4091357 Receiving system of telemetering signal  
In a telemeter system using a measuring probe for radiating a sound pulse signal the pulse spacing of which corresponds to information to be measured such as temperature or salinity of various...
4090170 Process and apparatus for investigating the activity of a cathodic protection unit  
A method and apparatus for remotely measuring the cathodic protection level on a cathodically protected structure. The method uses a remote apparatus to measure the cathodic protection level and...
4079364 Water safety alarm apparatus  
An alarm apparatus which is activated upon immersion. The apparatus is adapted to be worn whenever the wearer is expected to be in the proximity of a body of open water and will sound an alarm...
4075601 Combined pipeline marker and test unit  
An acoustic type of pipeline marker that has combined with it, as a unitary structure, an acoustic signal detector for determining whether the marker is operating. The detector is only energized...
4069469 System for collecting information in water  
A submersible which can automatically move along the cable laid under water, has a sensor, and the information collected or gathered by said sensor is forwarded to the control unit on land through...
4065746 Device for measuring the velocity of a body in an undersea environment  
A hollow, projectile-shaped body containing an acoustical transducer is rased into the sea such that the body descends in free fall until it strikes and penetrates the sea floor, coming to a rest...
4050819 Undersea ranging-communications from altitude via laser  
An optical means for detecting and/or communicating with underwater objects rom airborne platforms wherein a number of laser sources are collimated so as to illuminate a particular portion of the...
4045767 Method of ultrasonic data communication and apparatus for carrying out the method  
In an ultrasonic data communication system, each datum is represented by a specific ultrasonic wave signal composed of plural frequency components arranged according to a specific one of...
4044611 Expendable oceanography probe  
An expendable oceanography probe has a hollow cylindrical housing, a front end element in the form of a weight fitted into the lower end of the cylindrical housing, a sensor, such as a thermistor,...
4027286 Multiplexed data monitoring system  
A multiplexed data monitoring system for use in monitoring the status of control valves or the like in subsea petroleum well control systems, utilizes an encoder circuit located externally of the...
4020449 Signal transmitting and receiving device  
A signal to be transferred comprises a plurality of patterns each including a time region containing a plurality of frequency signals and a time region containing no frequency signal. When a...
4007331 Apparatus for demodulation of relative phase modulated binary data  
A digital system is disclosed for demodulating relative phase-shift modulated binary data using a delay circuit to store one data bit period of sample bits for phase comparison with the next data...
3958215 Device for the acoustic submarine teletyping  
This invention involves the acoustical transmission of messages from an individual operating under water to persons operating on the surface. A wrist-mounted, keyboard-actuated, acoustical signal...
3958214 Encoded echo-ranging signal generator  
1. An encoded echo-ranging signal generator comprising in combination; A digital shift register having a plurality of binary encoded stages, A shift pulse generator coupled to said digital shift...
3939461 Correlation system using matched signals  
4. A signal-reconstitution method for signals transmitted through a bounded medium comprising the steps of:Propagating a first signal from one point in said bounded medium;Receiving the propagated...
3932833 Instrument for direct measurement of the velocity of sound in a fluid  
This invention provides an expendable velocimeter probe. High frequency transmitting and receiving transducers are mounted opposite to one another in axial alignment on the probe body and on a...

Matches 151 - 200 out of 255 < 1 2 3 4 5 6 >