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Napoleon Bonaparte ; When told of the Robert Fulton steamboat
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| Number | Title | Issue Date |
| 4707787 | Beam-activated complex-solid formation utilizing pattern-independent, coordinate-sequence construction A system and method for forming a model of an underground geological formation is disclosed wherein a quantity of non-solid material of the type which solidifies at volumetric positions impinged upon by preselected incident energy as used. Memory means ar... | 11/17/1987 |
| 4696539 | Fiber optic cable connector A connector for fiber optic cables includes an elongated tubular housing and a pair of termination assemblies which surround the end of each fiber optic cable. A lens element is adjacent one end of each termination assembly, and a sleeve surrounds each le... | 09/29/1987 |
| 4694436 | Noise-attenuating streamer-cable bulkhead A plurality of streamer-cable bulkheads mounted within a streamer cable in cascade for radially scattering tube-wave noise from a streamer-cable. Each bulkhead consists of an annular body with conical surfaces converging at a desired angle, extending outw... | 09/15/1987 |
| 4692907 | Means for maintaining a fixed relative orientation of two sensors A gradiometer array of two or more sensors consists of a closed housing filled with a volume of fluid having a desired specific gravity. The sensors are freely suspended in the housing by flexible tethers. The sensors have different specific gravities suc... | 09/08/1987 |
| 4688200 | Optical system for detecting acoustic wave energy in a fluid medium An optical sound source signature transducer system for use in marine seismic exploration in which coherent radiation from a laser is coupled to unequal length optical paths exposed to modulation by the acoustic energy wave generated by the sound source. ... | 08/18/1987 |
| 4686654 | Method for generating orthogonal sweep signals A first sweep signal consists of a plurality of waveforms having non-invariant fundamental periods exhibiting a monotonic frequency progression of at least one octave over the duration of the sweep. Each waveform may consist of an ordered set of asymmetri... | 08/11/1987 |
| 4679174 | Method for seismic lithologic modeling A method of seismic exploration of the subsurface of the earth. Seismic reflection data are gathered in a selected area. The seismic data are combined with available non-seismic data to define an initial two-dimensional lithologic model. Based upon the in... | 07/07/1987 |
| 4676337 | Seismic vibrator baseplate A baseplate for a seismic vibrator is formed from two identical cast plate members having stiffening ribs and alternating plug and socket cones along the ribs. The cast plate members are arranged together to align opposed plug and socket cones of the plat... | 06/30/1987 |
| 4676183 | Ring paravane A submersible positioning device, such as a paravane coupled to a distant end of a towing cable may include a front cylindrical stabilizer having a wing diametrically disposed therein and having a predetermined angle of attack coupled to a towing bridle w... | 06/30/1987 |
| 4648082 | Marine acoustic gradient sensor A pressure gradient sensor is disclosed for optically sensing the direction and magnitude of an acoustic wave propagating through a fluid. Each sensor consists generally of at least three fiber-optic displacement sensors disposed within a circular array o... | 03/03/1987 |
| 4647767 | Optical goniometer containing immiscible fluids having different refractive indices An optical encoding goniometer includes a rotatable chamber containing unequal volumes of two immiscible fluids having different indices of refraction and different densities. A plurality of optical fibers are bent to a critical radius and mounted in the ... | 03/03/1987 |
| 4639729 | Telemetric system In a two-stage, time-division multiplexing method and apparatus, a plurality of sensors are disposed at equal intervals along a plurality of transmission channels. An interrogation signal is transmitted from a recording station to all of the sensors along... | 01/27/1987 |
| 4638662 | Tank leakage detector A method and apparatus for detecting a change in the liquid level in a liquid storage tank, such as an underground hydrocarbon storage tank. A gas line is inserted just below the level of the liquid in the tank, and a second interconnected gas line is pla... | 01/27/1987 |
| 4589100 | Method and apparatus for positioning seismic arrays A seismic data recording system includes a central station and a plurality of remote seismic data recording units that are deployed within a desired region relative to the central station. The differential locations of the remote recording units relative ... | 05/13/1986 |
| 4587857 | Method for mounting poorly consolidated core samples A method of mounting and confining poorly and/or unconsolidated core samples for subsequent handling and testing is disclosed. The preferred method comprises the steps of inserting a poorly consolidated core sample into a predetermined length of heat shri... | 05/13/1986 |
| 4581723 | Method for maintaining a constant tension on a seismic marine cable A method for maintaining a substantially constant tension on a towed seismic cable, wherein the instantaneous towing force and the instantaneous cable displacement relative to a fixed shipboard reference are continously measured and sampled. A microproces... | 04/08/1986 |
| 4578785 | Two-component acoustic borehole tool An acoustic borehole tool consists of two components: A first component containing power supplies, signal processing and control electronics and a sidewall locking mechanism. A second component includes a seismic sensor and a clamping device for pressing ... | 03/25/1986 |
| 4577723 | Method for improving the efficiency of air guns A quantity of a solution of a long-chain polymer is injected into the water around an air gun. The resulting dilute solution of the long-chain polymer tends to reduce turbulence surrounding the air bubble that is created when the gun is fired.... | 03/25/1986 |
| 4570245 | Constant tensioner for a seismic marine cable A system for maintaining a substantially constant tension on a towed seismic cable, wherein the instantaneous towing force and the instantaneous cable displacement relative to a fixed shipboard reference are continuously measured and sampled. A microproce... | 02/11/1986 |
| 4567583 | Adaptive preset force level control for a seismic vibrator A seismic vibrator for shaking the ground is driven by an input sweep signal. A control signal, which is a function of the output force level of the vibrator, modulates the sweep signal to limit the output force level to a value that will prevent ground d... | 01/28/1986 |
| 4566083 | Seismic timing control system A method for optimizing the acoustic signal-to-noise ratio during a useful maximal-length recording cycle within the time frame of a minimal-length recording episode. To implement the method, during an intermittent-tow seismic operation, the noise level d... | 01/21/1986 |
| 4547869 | Marine seismic sensor A hydrophone streamer that includes several arrays of optical fiber pressure sensors. Each array consists of at least three sensors symmetrically disposed around the inside of the streamer skin to form a vertically-disposed array. Each sensor modulates a ... | 10/15/1985 |
| 4541079 | Marine streamer cable recovery system Selected sections of a seismic streamer cable are provided with an acoustically-triggered compressed gas supply. The acoustic triggering devices associated with each compressed gas supply may be individually addressed by a coded signal. In the event that ... | 09/10/1985 |
| 4516230 | Protective drive-level limiter for an electro-hydraulic vibrator In accordance with an embodiment of this invention, voltages are received from the pilot valve torque motor, the main servo valve and the actuator indicating the value of the torque motor current, spool position and actuator displacement. The received vol... | 05/07/1985 |
| 4500979 | Optical seismic transducer A spring-suspended mass has top and bottom reflectors. A laser light beam is divided into separate beams that are reflected from the top and bottom reflectors into photo detectors. At the photo detectors, a reference beam from the same laser is recombined... | 02/19/1985 |
| 4484314 | Cop switch-position encoder, method and apparatus A pulse is applied sequentially to each geophone input line to the stator of a CDP switch. A pulse detector is connected to the first output line of the CDP Switch cursor. A counter counts the number of pulses applied to inactive input lines before a puls... | 11/20/1984 |
| 4455500 | Sensitivity and capacitance adjustment method for piezoelectric accelerometers A dual-transducer accelerometer, having a liquid inertia mass is disclosed. Each transducer consists of a ceramic PZT piezo-electric wafer glued to a flexible substrate. Certain characteristics of sensitivity and capacitance of one transducer can be match... | 06/19/1984 |
| 4375089 | Depth transducer system for a seismic streamer cable A seismic streamer cable, composed of a plurality of cable sections includes a common transmission line and an internally mounted inductive element in each section. The inductive elements are coupled in parallel to the common transmission line. A pluralit... | 02/22/1983 |
| 4314363 | Marine seismic cable handler A hydraulically-powered yo-yo reel for handling a marine seismic cable in shallow water. At the beginning of a recording episode, a partially reeled-in seismic cable is released to drift to a standstill behind a ship. Data are recorded. The cable is then ... | 02/02/1982 |
| 4296827 | Air-gun fire time sensor The resistive sensor consists of a pair of electrodes separated by an impervious insulating material. The sensor is mounted adjacent to an exhaust port of an airgun, in the path of the air blast that results when the gun is fired. When the air gun is subm... | 10/27/1981 |
| 4182428 | Hydraulically-coupled, land seismic signal source The seismic source consists of a tank for containing a volume of water. The tank is held in firm contact with the ground by suitable weighting means. The tank wall that contacts the ground is thinner than the other walls. The volume of water in the tank i... | 01/08/1980 |
| 4117448 | Seismic telemetric system for land operations The telemetric system consists of a large number of identical cable sections laid over the ground end-to-end, in a long array or "spread". The cables have a number of external connectors along their length for connecting geophone groups. The cables are el... | 09/26/1978 |
| 4116294 | Torque equalizer for a hydraulically driven, four-wheel-drive vehicle A two-axle, four-wheel-drive vehicle has separate hydraulic drive systems to drive the front and rear pairs of traction wheels. Each drive system includes a hydraulic motor that is powered by its own variable displacement pump. The torque developed by the... | 09/26/1978 |
| 4066993 | Limited-range seismic control system A seismic exploration system includes a recording vehicle having a seismic cable connected thereto and one or more vibrator units. The seismic sensor cable includes at least one unterminated conductor. Operation of the vibrator units is programmed by tran... | 01/03/1978 |
| 4031504 | Gain ranging amplifier system The compression portion of an instantaneous companding (compressing-expanding) system includes at least two and preferably four "bi-gain" amplifiers connected in cascade. Each bi-gain amplifier normally has a low-gain state and can be switched to a discre... | 06/21/1977 |
| 4031506 | Multiplexer commutated high pass filter A multi-channel analog system comprises a plurality of channels each being adapted to receive analog signals from a signal source such as a seismic sensor. A multiplexer multiplexes the analog channels prior to converting the channels' signals into digita... | 06/21/1977 |
| 4023140 | Seismic data telemetering system A plurality of data acquisition and transceiver units are connected in series to a central signal processor through a common telemeter link. The telemeter link includes a data channel, an interrogation channel and a control channel. The signal propagation... | 05/10/1977 |
| 4016951 | Air transportable seismic exploration system for use on ice-covered waters A seismic exploration system for use on ice-covered waters is disclosed. The system comprises a housing which contains equipment such as an engine, a compressor, means for boring holes in the ice, and acoustic signal generating means that can be lowered i... | 04/12/1977 |
| 4011416 | Multiple color light frequencies switched audio modulation This invention relates to synchronizing switching systems for modulation of light spectrum frequencies, and a cathode-ray tube apparatus for exposing and simultaneously at electronic speed synchronizing such frequencies onto celluloid light sensitive phot... | 03/08/1977 |
| 4005273 | Multiplexer offset removal circuit In a multi-channel multiplexed system, each signal-receiving input channel has a DC blocking capacitor. One of the input channels to the multiplexer is grounded making this channel a test channel. A signal-conditioner-and-amplifier network (SCAN) couples ... | 01/25/1977 |
