Quotables
"To place a man in a multi-stage rocket and project him into the controlling gravitational field of the moon where the passengers can make scientific observations, perhaps land alive, and then return to earth--all that constitutes a wild dream worthy of Jules Verne. I am bold enough to say that such a man-made voyage will never occur regardless of all future advances."
Lee deForest, American radio pioneer ; 1957
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| Number | Title | Issue Date |
| 6647791 | Device for contactlessly gripping and positioning components A mechanism for the contactless gripping and positioning of a component having a planar peripheral edge region, including a sound producing device producing a pattern of levitation sound waves for keeping the component in suspension at a selected position... | 11/18/2003 |
| 6561309 | Gas flow generator and apparatus for using the same A gas flow generator for use in a position control apparatus having an oscillating motion driver, a chamber having a side wall extending outwardly from the oscillatory motion generating surface of the driver, a distal end wall spaced from the driver and j... | 05/13/2003 |
| 6250388 | Gas impulse device and method of use thereof A self-firing and self-propelling gas impulse device which includes a housing having a longitudinal axis, a gas inlet port, and one or more gas discharge ports; an inlet chamber, arranged for gas communication with a source of compressed gas via the inlet... | 06/26/2001 |
| 6029519 | Apparatus and method for manipulating a body in a fluid Apparatus for testing hydrodynamic performance characteristics of an object is operative for remotely manipulating the object using standing acoustic wave fields. The object is provided with a plurality of internal solid ies, each having a region of or... | 02/29/2000 |
| 5992559 | Reversible polarity borehole seismic device for P and enhanced S-wave crosshole testing A seismic source for crosshole testing comprises a hammer rod supported by axial bearings in the ends of a cylindrical housing. Fasteners attach a down-blow hammer to the hammer rod inside the housing. A helical spring inside the housing biases the hammer... | 11/30/1999 |
| 5925821 | Device for measuring noise in a pipe traversed by a fluid For performing a noise measurement in a pipe (16) traversed by a fluid such as air, in the pipe is placed a measuring device comprising a pipe section (10) having the same cross-section and in which is formed an elongated slot (18). The slot (18) is cover... | 07/20/1999 |
| 5811741 | Apparatus for placing geophones beneath the surface of the earth An apparatus for placing geophones beneath the surface of the earth includes a machine frame that supports an elongated probe rod. The probe rod is dimensioned to reach a selected subterranean earth layer. The rod has upper and lower end portions. A geoph... | 09/22/1998 |
| 5808243 | Multistage turbulence shield for microphones An acoustic sensing means such as a microphone or a thin-film sensor is located in a flowing medium. To prevent the sensing of flow generated noise, the sensing means is separated from the flowing medium by at least three stages of shielding. In a preferr... | 09/15/1998 |
| 5712452 | Sound generator An improved sound generator includes a vibrating plate and a casing. The vibrating plate may become concave upon pressure and may return to its convex shape automatically to generate vibration and thus sound. An elastic plate is attached to the convex sur... | 01/27/1998 |
| 5690145 | Fluidic device controlled by remotely located acoustic energy source A fluidic device is provided to control the path of a fluid. A control cher has at least one window incorporated therein that permits acoustic waves impinging thereon to pass therethrough. An ultrasonic source is remotely located with respect to the cont... | 11/25/1997 |
| 5659155 | Acoustical transducer enclosure The purpose of the invention is to direct, in a coherent fashion, audible frequencies, particularly, low frequencies and especially those below 90 cycles. The advantage to directing low frequencies to acute projection patterns previously thought impossibl... | 08/19/1997 |
| 5550789 | Water turbulence detector A Doppler shift flow meter array detects turbulence in the wake of a submne. Three sets of transmitting and receiving sonic transducers are spaced in a line on a rigid support. The transmitting transducers emit ultrasonic energy which is reflected from p... | 08/27/1996 |
| 5540248 | Fluidic sound amplification system A fluidic sound amplification system couples successive laminar proportional amplifiers through acoustic radiation between output and input horns to avoid the propagation of null offset signals. A second approach to obviating DC null bias in a fluidic sou... | 07/30/1996 |
| 5517173 | Apparatus generating noise sound for electric car An apparatus for generating a noise sound, which is equipped in industrial electric cars with little or no driving sound and generates an appropriate amount of noise sound so that the nearby cars or pedestrians can notice their approch in a narrow pathway... | 05/14/1996 |
| 5511044 | Thrust producing apparatus A device for producing thrust has a variety of uses, such as pumping liquid, compressing or blowing air, or powering an aircraft. The device has a chamber with a sound driver located therein. The sound driver creates a compression standing wave in the cha... | 04/23/1996 |
| 5500493 | Acoustic beam levitation A system is described that uses acoustic energy to position an object, which simplifies the application of forces in defined directions to the object and which enables the application of large forces to the object. The system includes transducers (21-24, ... | 03/19/1996 |
| 5467322 | Water hammer driven vibrator The invention provides apparatus for shaking structures such as fins in a fluid agitator, shaking tables, shaking screens, conveyors, or the walls of bins or hoppers. The apparatus is driven by a hydraulic driving system in which high pressure pulses are ... | 11/14/1995 |
| 5459699 | Method and apparatus for generating high energy acoustic pulses A method and apparatus are disclosed for generating intense acoustic pulses by means of the water hammer effect. The method involves generating a water hammer in a conduit by suddenly interrupting a high velocity flow of fluid through the conduit. The kin... | 10/17/1995 |
| 5394786 | Acoustic/shock wave attenuating assembly An acoustic/shock wave attenuating assembly comprised of porous screens forms an enclosure filled with a suitable pressure wave attenuating medium or material having fluid characteristics. This basic configuration can be suspended or held in place by a ri... | 03/07/1995 |
| 5389746 | Submarine hull structures providing acoustically isolated hull openings An acoustic isolation structure providing an acoustically isolated opening nd comprising coaxial inner and outer annular structural members defining an irregular annulus between them. Acoustical isolation material is provided within this annulus to acousti... | 02/14/1995 |
| 5371719 | High security ultrasonic receiver apparatus A high security ultrasonic receiver apparatus including a rigid metal faceplate having an ultrasonic sensor affixed to the rear side thereof and adapted to sense acoustical energy transmitted to the faceplate. The faceplate has no apertures through which ... | 12/06/1994 |
| 5347496 | Method and system of mapping acoustic near field A method and system for mapping the acoustic near field of a stationary al symmetric structure are provided. The structure is subjected to a rotating excitation energy profile from a plurality of stationary excitation sites located radially around the st... | 09/13/1994 |
| 5257676 | Method and apparatus for stabilizing levitated objects The present invention is drawn to a method of stabilizing the motion of a levitated object. The method involves continuously determining the motion of a levitated object, relative to a given point, and deriving the velocity of the object from the determin... | 11/02/1993 |
| 5229973 | Method of selecting ultrasonic transducers for use in ultrasonic inspection apparatus A method of selecting the ultrasonic transducers which are used in non destructive ultrasonic inspection apparatus consists of establishing under predetermined conditions the frequency spectra of the transducers under consideration, comparing these spectr... | 07/20/1993 |
| 5225622 | Acoustic/shock wave attenuating assembly An acoustic/shock wave attenuating assembly comprised of porous screens forms an enclosure filled with a suitable pressure wave attenuating medium or material having fluid characteristics. This basic configuration can be suspended or held in place by a ri... | 07/06/1993 |
| 5183974 | Gas pulsation attenuator for automotive air conditioning compressor An attenuator for pressure and sound energy pulsations, such as are commonly produced in refrigerant gas discharged from a piston-type refrigerant compressor, is provided. The attenuator includes an annular elastomeric body supported by a rigid tubular ho... | 02/02/1993 |
| 5096017 | Aero-acoustic levitation device and method An acoustic levitator device for suspending a specimen object under the influence of gravity without contact with a solid surface comprising in combination gas levitation means for directing a concentrated flow of gas along an axis upwardly against the ob... | 03/17/1992 |
| 5081900 | Resonance damage process A method and system for the production of stress waves in a solid target employs a pulsed source of coherent photon energy. the pulse repetition frequency of the photon energy is chosen in dependence upon the physical dimension and nature of the selected ... | 01/21/1992 |
| 5072415 | Method and microprocessor-based apparatus for directly measuring a particular index for the evaluation of the environmental noise pollution This invention relates to a method and a microprocessor-based apparatus for directly measuring the noise using a nuisance index (LDI) bound to two physical parameters of the noise: the average energy level (LE) and the fluctuation le... | 12/10/1991 |
| 5036944 | Method and apparatus for acoustic levitation An acoustic levitator includes a pair of opposed sound sources which have interfering sound waves producing acoustic energy wells in which an object may be levitated. The phase of one sound source may be changed relative to the other in order to move the ... | 08/06/1991 |
| 5033033 | Ultrasonic systems A method of establishing an ultrasonic standing wave in a fluid medium is described in which the standing wave is produced by an acoustic energy output along a path extending through the fluid medium, the frequency of said energy output being changed cycl... | 07/16/1991 |
| 5007031 | Apparatus for positioning geophones in shallow holes A geophone and a geophone planting tool adapted to engage the outer case of the geophone, to hold it securely during aligning, leveling and implanting into the earth and to release it upon lifting the geophone planting tool from the geophone have matable ... | 04/09/1991 |
| 4975799 | Fibermetal acoustic reflector for sonar An underwater acoustic reflector for sonar applications having a title or her geometric form of fibermetal enclosed in a neoprene waterproof envelope and having surface area free of sharp projections that might puncture the envelope when subjected to elev... | 12/04/1990 |
| 4970704 | Acoustical generator Disclosed is an acoustical energy generator having a venturi front section o which is attached a pair of rear tail pipes. A pair of return flow manifolds are respectively connected between said rear tail pipes and said front venturi section at such locatio... | 11/13/1990 |
| 4964100 | Acoustic detection system An acoustic detection device having a parabolic dish antenna for gathering ound waves and providing a first stage of amplification, an exponential horn located at the focus of the parabolic dish antenna for further acoustic amplification, a fluidic gainblo... | 10/16/1990 |
| 4962330 | Acoustic transducer apparatus with reduced thermal conduction A horn is described for transmitting sound from a transducer to a heated chamber containing an object which is levitated by acoustic energy while it is heated to a molten state, which minimizes heat transfer to thereby minimize heating of the transducer, ... | 10/09/1990 |
| 4943954 | Method and a system for counteracting marine biologic fouling of a hull or a submerged construction A system and a method for counteracting marine fouling of e.g. a vessel hull (1) are provided. Electro-mechanical vibration transducers (2, 3) are arranged in pairs adjacent to fixed (clamped) nodal lines (4) on said hull (1), and are driven in an inverte... | 07/24/1990 |
| 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 |
| 4917211 | Seismic isolator A seismic isolator comprises: a friction device having upper friction plate and a lower friction plate, a friction plane of the upper friction plate and the lower friction plate having a characteristic of Coulomb friction; and horizontally placed springs ... | 04/17/1990 |
| 4903793 | Noise suppression by gas liquid mixture Gas liquid mixtures readily absorb the wave energy of noise and thus reduce noise intensity. By circulating gas liquid mixtures through jackets surrounding noisy machines, such as internal combustion engines, undesirable noise can be reduced.... | 02/27/1990 |
