Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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| Number | Title | Issue Date |
| 6831876 | Acoustic window An improved acoustic window for an acoustic waveform passage having a generally uniform transmission loss at an angle of incidence of between −40° and +40°. The composition is formed from at least one core layer and at least two septa, with the core layer being ... | 12/14/2004 |
| 6751162 | Seismic sensor A seismic sensor contains a geophone (4) disposed within a housing (12). The sensor is also provided with locking means (14, 19, 21) that can either lock the geophone 4 relative to the housing, or can allow the geophone to rotate within t... | 06/15/2004 |
| 6584038 | Device for receiving seismic waves and method for coupling them with a solid environment Seismic wave reception device comprising a hydrophone and/or a geophone and method for coupling it (or them) with a solid medium such as the subsoil. The device comprises at least one hydrophone (2) immersed in a closed flexible-walled sheath (7) filled with l... | 06/24/2003 |
| 6173803 | High amplitude sound wave generator A method and device for generating a high amplitude sound wave is provided. The device includes a housing having an open end. A piston is slidably disposed in the open end of the housing and forms a chamber for holding a pressurized liquid. The pressurize... | 01/16/2001 |
| 5390155 | Acoustic particle acceleration sensor and array of such sensors An element responsive to acoustic particle acceleration for sensing acoustic signals in a region of low acoustic pressure is disclosed. The element may be isolated from acoustic noise when positioned adjacent an acoustic noise generating high acoustic imp... | 02/14/1995 |
| 5365491 | Marine seismic bottom geophone coupling and anchor A marine seismic bottom geophone anchor and coupling device comprising two rectangular fabric sections attached along their edges and along a plurality of lines between edges to form a plurality of pockets. The pockets are filled with a weighting material... | 11/15/1994 |
| 5263371 | Methods for temperature-compensated liquid height and leak detection measurements using quasi-static reference subsystem A method for measuring the temperature-compensated change in the height of a surface of a liquid. The method positions an acoustic signal transducer for emitting and receiving acoustic signals below the surface of the liquid, positions a quasi-static refe... | 11/23/1993 |
| 5226320 | Measuring device and process for determining the fill level in fluid containers, preferably for tank installations, with a sound waveguide In a level measuring device for containers filled with fluid, preferably tanks in tank installations, the fill level height h is determined from the transit time of ultrasound pulses which are emitted by first sound pulse transmitters along a main measuri... | 07/13/1993 |
| 5130948 | Method and apparatus for reducing acoustic emission from submerged submarines A method and an apparatus are disclosed serving to reduce acoustic emission from submerged submarines in which vibrations from moving mechanical elements within an inner region are transmitted to an outer hull via a vibration transmission path. For decoup... | 07/14/1992 |
| 5128656 | Level detecting method and its apparatus A level detecting method and apparatus wherein a tubular member with one end open has a stationary wave generating means located within the tubular member. The stationary wave generating means generates stationary waves having a node or antinode at the op... | 07/07/1992 |
| 5127266 | Methods for liquid measurement using quasi-static reference subsystem Methods for measuring liquid levels and leak rates in a storage tank, using an acoustic transducer and a quasi-static reference device that positions an acoustic target within a predetermined distance range below the surface of the liquid. A method for me... | 07/07/1992 |
| 5119676 | Ultrasonic method and apparatus for determining water level in a closed vessel An ultrasonic method and apparatus for measuring liquid level in a vessel employing an acoustic waveguide (16) connected to an ultrasonic transducer (14) and the vessel (18). Guiding means (24) situated inside a vessel (18) directs the acoustic energy pul... | 06/09/1992 |
| 5121340 | Multi-level probe and system for measurement of physical conditions in liquid-containing tanks A multi-level probe for sonic range measurements utilizes a plurality of parallel reflectors that each include an opening arranged coaxially about a beam of ultrasonic energy transmitted along a reference axis from an associated transducer. The opening in... | 06/09/1992 |
| 5105394 | Constrained diaphragm transducer An acoustic source apparatus has a loudspeaker enclosed within a substantly pressure resistant and water tight enclosure. Acoustic energy from the loudspeaker emanates through an opening in the enclosure. This opening is covered by a resilient diaphragm ... | 04/14/1992 |
| 5076101 | Liquid level measurement system for tanks A system for sensing the level of contents in a container is disclosed. A tubular member is vertically disposed in the container and sealed from the contents of the container. A marker located in the tubular member and generating a peripheral polarized ma... | 12/31/1991 |
| 5036703 | Method and apparatus for testing liquid fillings in tanks The invention relates to a method and an apparatus for investigating a filling of liquid in a container, e.g. a fuel tank in respect of actual volume, density, temperature, opacity or other condition. From an emitter (19) at the bottom of the container th... | 08/06/1991 |
| 4997705 | Window for acoustic wave form and method for making A laminate acoustic window for sonar systems having a pair of septa sandwiching a core therebetween, the core being made of a low shear high elongation to break material, the septa being formed of a relatively low density, high modulus material. The windo... | 03/05/1991 |
| 4920796 | Tank level meter A tank level meter includes an elongated sound conductor of a solid material extending over the entire height of the tank. A sound generator is coupled to one end of the sound conductor to excite thereon surface waves and the opposite end of the conductor... | 05/01/1990 |
| 4916674 | Method and apparatus for improving the shallow water performance of a depth sounder Acoustic delay means are interposed between the face of a transducer and the bottom of a vessel, with the delay being equal to or greater than the shallowest depth the associated depth sounder capable of, whereby subtracting out the depth associated with ... | 04/10/1990 |
| 4896535 | Tank level meter A tank level meter includes an elongated sound conductor of a solid material extending over the entire height of the tank and having a coating partially surrounding it. A sound generator is coupled to one end of the sound conductor to excite thereon surfa... | 01/30/1990 |
| 4858204 | Underwater signaling device An underwater signaling device being removably mounted to the strap commonly found in scuba diving tanks. The device includes two elongated members an one of them being removably secured to the strap while the other one, hingedly mounted to the first one,... | 08/15/1989 |
| 4853691 | Method of and apparatus for the acoustic signalling of cases of drowning in swimming pools The invention describes a method and apparatus for the acoustic signalling of cases of drowning in swimming pools, to guarantee reliable trigger of the alarm while avoiding any false alarms. This is effected basically by a switching element (1) in a water... | 08/01/1989 |
| 4834210 | Apparatus for generating seismic waves An improved apparatus for generating a seismic wave in a borehole in the earth is disclosed. A portion of the borehole, which may be the bottom of the hole or any other point along its length, is selected as the site for seismic wave generation. A device ... | 05/30/1989 |
| 4811815 | Process and a device for hydrodynamic sound pulse generation in a liquid A process and a device for hydrodynamic sound pulse generation in a liquid, n particular for sound pulse generation at sea for marine geophysics measurements. In an pipe (1), open on one end, which surrounds a liquid column of a specific length and which m... | 03/14/1989 |
| 4782910 | Bi-polar bender transducer for logging tools A bender acoustic transducer has a flat, piezoelectric element affixed to a flat, elongated inert element. The ends of the inert element are hinged on a supporting rectangular frame which has a rectangular opening. Two sides of the elements are exposed so... | 11/08/1988 |
| 4780862 | Borehole televiewer A borehole televiewer uses an acoustic fluid which is lubricating, non-toxic, thermally conductive, electrically insulating, non-reactive, tolerant of high temperatures and pressures, impedance-matched to that of the borehole fluids and the tool window, a... | 10/25/1988 |
| 4725990 | Marine shear cable A marine cable for detecting converted shear waves reflected from the strata beneath a body of water in response to a compressional wave generated in the body of water. The cable comprises a jacket, a mount attached to the stress member, a geophone positi... | 02/16/1988 |
| 4713800 | Seismic air gun A seismic air gun has a passage between the stem of its shuttle and a baffle, whereby ambient pressure can reach the back of the operating piston. The gun is fired by dumping a small quantity of pressure air from the operating chamber via a solenoid valve... | 12/15/1987 |
| 4700803 | Transducer forming compression and shear waves for use in acoustic well logging For use in acoustic logging, an acoustic wave transducer system forming both compression and shear waves is disclosed, the system having the preferred form of a plurality of radially directed magnetostrictive expansion means, being N in number, each havin... | 10/20/1987 |
| 4648479 | Multiple-port, multiple-chamber, tuned air-powered subsea seismic source The invention is a multi-port, multi-chamber, tuned, air-powered subsea seismic source. It is suitable for producing a seismic wave in a subsea environment during seismic prospecting. Interconnected pressurized chambers are formed between plates located o... | 03/10/1987 |
| 4635747 | Marine seismic vibrator having support structure including vibration isolators Mounting structure for a marine seismic vibrator comprising at least three acoustic isolators equally spaced apart about an upper housing of the vibrator. Each of the isolators comprises a pair of spaced mounting pads mechanically secured to the housing. ... | 01/13/1987 |
| 4633969 | Signalling device A device for under-water signalling has a chamber (38) which is normally closed by a replaceable element (39). A cartridge (16) in the device can be fired to release gas into the chamber and rupture the element (39), thus causing a sound wave to travel th... | 01/06/1987 |
| 4633970 | Distributed marine seismic source The invention relates to a compact tunable subsea seismic source. The source has multiple seismic radiating plates placed symmetrically about a central housing which contains a hydraulic actuating system. The source is towed to optimize the amount of ener... | 01/06/1987 |
| 4557348 | Tunable marine seismic source The disclosed device is a marine seismic source which emits a constantly varying FM signal in the 10 to 100 Hz range. The seismic source utilizes an adjustable length cantilever spring rotatably attached to stiff acoustic radiators, which creat... | 12/10/1985 |
| 4483411 | Tunable marine seismic source The disclosed device is a marine seismic source which produces a varying FM signal in the low end of the acoustic spectrum. The seismic source uses stiff oscillating radiators to create a signal in the water. These radiators are attached to devices acting... | 11/20/1984 |
| 4463451 | System for seismic digital data acquisition over water covered areas A seismic data acquisition system for use in shallow water covered areas comprises a flotation device which serves also to house the electronic components; anchoring device with mechanical filter device to protect the anchor, so as to insure its maintaini... | 07/31/1984 |
| 4442916 | Underwater shear wave vibrator coupling An underwater shear wave vibrator apparatus has a housing with a vibratory generating system mounted inside the housing for generating a force along an axis substantially parallel to the underwater seabed surface. A coupling apparatus which has an attachm... | 04/17/1984 |
| 4316271 | Purging and expansion mechanism A housing for an electroacoustic transducer includes a filling or access port for introducing an inert liquid into the chamber defined by the housing. The access port includes a bubble trap and a vent for extracting gaseous bubbles from the fluid fill. Th... | 02/16/1982 |
| 4219096 | Submergible marine seismic source A marine seismic source employs a cylindrical gas exploder adapted to be supported from a surface vessel in a submerged state adjacent a marine bottom. The force of expanding gases within the exploder applies a thrust along the exploder longitudinal axis ... | 08/26/1980 |
| 4207961 | Exciting method for logging by S wave An exciting method for a logging by means of S wave is provided which includes inserting a wave source into a bore hole containing water and actuating an operating mechanism in the wave source to impart an exciting force to the bore hole wall in the direc... | 06/17/1980 |
