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| Number | Title | Issue Date |
| 7355924 | 3-D forward looking sonar with fixed frame of reference for navigation An imaging sonar system develops three-dimensional images of the space below, to the sides, and forward of a ship relative to a fixed frame of reference. Various features permit the system to be used in non-military environments and make possible low cost with subst... | 04/08/2008 |
| 7231331 | Method and system to detect stress corrosion cracking in pipeline systems A method for predicting the location of stress corrosion cracking in a steel gas pipeline in which in-line stress corrosion cracking smart tool data, external low level metal loss data and soil characterization data are compiled to predict the location of stress cor... | 06/12/2007 |
| 7228934 | Acoustic generator for distance sounding with a firing mechanism independent of the pressure equilibration force In the oil industry, the acoustic sounding method is a well-known technique for taking the depth measurements of particular attributes of an oil well or borehole. The method involves sending a short, sharp, clear, loud bang sound down a borehole, normally between th... | 06/12/2007 |
| 7095359 | Method of observing sea ice An ice thickness/drifting velocity observation of sea ice by using an ice thickness measurement sonar and a current meter moored into the sea and a sea ice observation by a high-resolution airborne SAR are synchronously performed, a correlation between a draft profi... | 08/22/2006 |
| 7013249 | Method for detecting near neutral/low pH stress corrosion cracking in steel gas pipeline systems A method for predicting the location of stress corrosion cracking in a steel gas pipeline in which in-line stress corrosion cracking smart tool data, external low level metal loss data and soil characterization data are compiled to predict the location of stress cor... | 03/14/2006 |
| 6847586 | Portable human height measuring device The invention is a portable human height measuring device. The device consists of an ultrasonic distance sensor, a controller and several output units. The ultrasonic distance sensor measures a person's height. The control unit converts the electronic signals from t... | 01/25/2005 |
| 5764466 | Circuit for short circuit detection through resistive shunt in power circuits using unipolar control voltage A power circuit includes a high-side transistor, a low-side transistor and a current sensing resistor in series connection as well as a threshold detection circuit for turning off the transistors when the current in the current sensing resistor exceeds a ... | 06/09/1998 |
| 5256908 | Facility space data logging device The invention is directed to a portable data logging device for logging d concerning room identification and dimensions in a building or facility. The invention includes a microprocessor based portable computer having manual and automated inputs for logg... | 10/26/1993 |
| 4774573 | Method and apparatus for generating a video display from signals produced by borehole scanning Apparatus for creating a video display from information generated by acoustically scanning a reflecting boundary circumferential of a borehole. A downhole tool generates a first signal each time a rotating transducer therein passes through magnetic north.... | 09/27/1988 |
| 4697253 | Sonar heave compensation system A ship-borne sonar heave compensation system measures the heave at time of transmit and at the expected time of receive of a bottom-echo which is approximated by the previous depth determination corrected for heave. Using these values of heave, the depth ... | 09/29/1987 |
| 4651309 | Fish sonar In the fish sonar, the temperature and the hydrogen ion exponent in the sea are recorded or displayed on the recording medium or display of the recording or displaying device with digital echo signals of an ultrasonic wave corresponding to a base line, a ... | 03/17/1987 |
| 4612633 | Sonar apparatus with means to transmit and print on alternate cycles A sonar system for indicating the presence of sonic energy reflecting interfaces in the water in the path of a downgoing sonic pulse. The received reflection or echo is recorded on a moving record or web by means of a stylus that is traversed across the w... | 09/16/1986 |
| 4504931 | Echo-sounding apparatus Echo-sounding apparatus with circuitry for achieving enhanced recording on electrically sensitive paper is disclosed in which the gain of a variable gain amplifier is reduced exponentially depending on the input signal amplitude as soon as this amplitude ... | 03/12/1985 |
| 4494224 | Pipe measuring method and apparatus Method and apparatus for determining the length of a tubular member such as a pipe are disclosed. A burst of acoustical pulses are emitted from a sending unit and are received by a reference acoustical transducer and by a slave acoustic transducer. The sl... | 01/15/1985 |
| 4425635 | Fish sonar A fish sonar is capable of detecting ultrasonic waves from a desired direction by shaping the waveforms of the outputs of a pair of vibrators spaced apart by a certain distance, and detecting a delay of the output from one of the vibrators with respect to... | 01/10/1984 |
| 4422166 | Undersea sonar scanner correlated with auxiliary sensor trace The output of an auxiliary sensor, such as a magnetometer or metal detector, is recorded along side a sonar trace record, such as from a side scan sonar or sonar sub-bottom profiler, using the same recorder mechanism. In one embodiment, the added informat... | 12/20/1983 |
| 4369508 | Sonar having signal amplitude differentiation and noise suppression Both signal amplitude presentation and noise suppression presentation of sonar signals have been known for some time, but have been incompatible in the same display system. In this disclosure, means are provided for separately processing the received sign... | 01/18/1983 |
| 4335451 | Signalling method and apparatus for enhancing echo images A marine depth sounder uses digital techniques to enhance the image of a received acoustic pulse for providing expansion of a portion of the range information with high resolution.... | 06/15/1982 |
| 4322827 | Range expander for sonar system An electronic range expander, such as for use on a sonar system, which has a rotating disc lamp or a rectilinear pen record, of the travel time, expressed as a certain distance from the transducer to an object and back again. The received signal is sample... | 03/30/1982 |
| 4308601 | Echo ranging apparatus and method Echo ranging apparatus to locate fish, vegetation and structure in the sea modifies signals presented to a recorder in the apparatus so as to enhance the capability of the user to distinguish fish in the vicinity of vegetation and structure, including the... | 12/29/1981 |
| 4254484 | Device for the determination of a ship in dock at the time of docking The present invention relates to a device for determination of position of a ship in the dock at docking, based on the principle of reflection of ultrasonic waves from solid bodies in water. The device includes two pairs of transmitting-receiving converters (1... | 03/03/1981 |
| 4241430 | Method and apparatus for determining the length of tubular members An improved method and apparatus for determining the length of a tubular member from a selected end thereof utilizing a hand-held probe wherein means are provided for producing sound pulses at the selected end, means are provided for detecting sound pulse... | 12/23/1980 |
| 4228530 | Mud level monitor The level of mud in the mud return line of a rotary drilling rig is determined by cutting a hole in the top of the line and securing over the hole the saddle shaped base flange of a heat insulated sound tube supporting the ultra sonic transducer of an air... | 10/14/1980 |
| 4217593 | Water depth-loran position recorder Apparatus, for use with a chart recording fathometer, for receiving loran C time difference/line of position information and for recording that information in vertical columns on the chart in juxtaposition with water depth information from the fathometer.... | 08/12/1980 |
| 4213198 | Method for classification of sonar echoes 1. A method for distinguishing between submarine and non-submarine sonar gets comprising the steps of producing a series of permanent displays of sonar target echoes having fixed electrical characteristics by projecting a beam of energy pulses of more th... | 07/15/1980 |
| 4208731 | Method and device for determining the geometrical outline of the underwater part of icebergs and the draught thereof This method comprises laying onto the water bottom at least one line of acoustic transducers which are put in energized condition when an iceberg is approaching the location of this line. Acoustic signals are then sequentially transmitted from at least on... | 06/17/1980 |
| 4207620 | Oceanographic mapping system An underwater mapping system in which a swath of terrain, much wider than a sonar beam width, is observed by means of a sonar beam scanned in the cross track plane of a ship. Filtering and correlation techniques are employed to compensate for distortions ... | 06/10/1980 |
| 4205395 | Depth recorder A microprocessor-controlled depth recorder wherein strip chart recording is effected by use of a thermal printing head and wherein the microprocessor is programmed for the selective printing of any one of a plurality of depth ranges and the optional simul... | 05/27/1980 |
| 4197591 | Facsimile recording of sonic values of the ocean bottom 1. A towable spread for surveying a water-submerged surface with a single towing vessel comprising at least two laterally spaced submarine vehicles of which at least one is dirigible, tow cables of substantially equal lengths attached to said vehicles, me... | 04/08/1980 |
| 4186372 | Brush holder for rectilinear recorder An improved brush holder for use in a rectilinear recorder which utilizes a web of electrical recording paper, which passes across, and in contact with a plane metal back-up plate. A narrow belt loop is supported by a pair of spaced rollers and is driven ... | 01/29/1980 |
| 4184210 | Sonic echo scanning and facsimile recording of water submerged surfaces 1. In a sonic echo system for classifying objects proud on the ocean floor in which a submarine vehicle moves through the ocean at a constant height above the ocean floor, scanning means for simultaneously deriving separate electric signals corresponding ... | 01/15/1980 |
| 4121190 | Method of and apparatus for sonar detection and the like with plural substantially orthogonal radiation beams This disclosure is concerned with employing substantially orthogonal transducer arrays with substantially complementary fan-shaped beams for pin-pointing underwater objects and the like.... | 10/17/1978 |
| 4118709 | Digital to graphic character generator In a device for graphically representing characters encoded in a digital nal, a writing element adapted to sweep across a recording medium at selected intervals is enabled by a timing means to selectively mark the recording medium during a selected serie... | 10/03/1978 |
| 4105990 | Process of and apparatus for exploring objects detected by different energy sources This disclosure is concerned with using different types of energy to probe for objects in media (such as water) in which one of the different types (such as acoustic energy) is more facilely propagated than another (such as light), so as to enable said on... | 08/08/1978 |
| 4104608 | Heave meter A contour mapping system including compensation for the heave or vertical displacement of a ship due to wave and swell effects, and for correcting errors due to such effects in depth or bottom contour measurements of a body of water. Vertical acceleration... | 08/01/1978 |
| 4096484 | Graphic recording system A graphic recording system for use with a multiple channel underwater sonar system. The recording system includes a plurality of memories, each for storing information received over a different channel of the sonar system. One or more channels may carry s... | 06/20/1978 |
| 4081783 | Fish finder capable of discriminating sizes of fish The present invention discloses a fish finder wherein one transducer is used to generate both high- and low-frequency ultrasonic waves which are simultaneously emitted and the electrical signal representative of the reflected high- or low-frequency ultras... | 03/28/1978 |
| 4080587 | Echo sounder for detecting schools of fish The present invention discloses an echo sounder for detecting schools of fish wherein the output signal from a transducer is amplified by a plurality of cascaded amplifiers so that the output from each amplifier may represent the received output signal hi... | 03/21/1978 |
| 4063212 | Side scan sonar system A side scan sonar system which records return echoes in a manner which realistically displays the spatial relationship between the sonar transducer and the echo producing topographical feature on the sea floor. The system includes a dual channel strip cha... | 12/13/1977 |
| 4060814 | Recorder with edge-guided belt A recorder in which a stylus assembly is transported across a recording medium at increased speeds by a flexible non-extensible belt having its edges slidably nested within slots oriented transversely of the recording medium. The belt has molded teeth for... | 11/29/1977 |
