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| Number | Title | Issue Date |
| 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 |
| 6065562 | System for imparting compressional and shear waves into the earth A seismic vibrator system for imparting compressional and shear wave vibrations into the earth has an earth contacting base with a vertical post. A tubular hub is slidably received on the post in a piston/cylinder relationship. Spaced apart horizontal top... | 05/23/2000 |
| 5477506 | In-flow acoustic sensor An acoustic sensor for measuring acoustic waves contained in fluid flow flowing over the sensor. The acoustic sensor reduces any unwanted self-noise associated with the flowing fluid by providing a nose cone having proper aerodynamic properties and by pos... | 12/19/1995 |
| 5289436 | Ultrasonic waveguide An ultrasonic waveguide includes a fluid-tight thin-walled tube filled with a viscous, compressible fluid. One end of the tube is coupled to a transducer for transforming electrical energy into waves of ultrasonic energy which propagate the length of the ... | 02/22/1994 |
| 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 |
| 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 |
| 4856614 | Process and device for seismic prospecting of a medium with induced waves created artificially in a bore-hole The process consists in generating a primary tube wave, in using a reflecting element for the tube wave and in recording the times of emission of the induced waves radiated by the reflecting element, in receiving and recording at least part of the induced... | 08/15/1989 |
| 4850450 | Logging tool housing with acoustic delay A housing for an acoustic logging tool apparatus for use in a well bore is disclosed. The logging tool comprises an acoustic transmitter and one or more acoustic receivers located a fixed distance from the transmitter and an elongated tubular housing havi... | 07/25/1989 |
| 4787070 | Coupler for ultrasonic transducer probe A coupler for use between an ultrasonic transducer probe and a sample to be examined thereby to keep the ultrasonic transducer probe and the sample spaced a prescribed distance from each other includes an acoustic lens in an area through which a ultrasoni... | 11/22/1988 |
| 4754443 | Airgun having shaft-bearing-guided shuttle and capable of fast repitition self-firing An airgun impulsive energy source has an elongated shaft bearing surrounding the shaft of the reciprocatable shuttle for guiding the shuttle and preventing its operating or firing pistons from contacting their respective cylinder walls. The illustrative e... | 06/28/1988 |
| 4580251 | Ultrasonic distance sensor A single transducer ultrasonic distance sensor is disclosed which provides for range sensing down to zero distance from the sensor housing envelope with an electroacoustic transducer subject to unavoidable ringing following emission of a burst of acoustic... | 04/01/1986 |
| 4442512 | Ultrasonic wave transmitting and receiving device for vehicles An ultrasonic wave transmitter and receiver adapted to be mounted on the rear portion of a vehicle to detect the distance between the rear end of the vehicle and any obstruction located at the rear side of the vehicle. The ultrasonic wave transmitter and ... | 04/10/1984 |
| 4433398 | Ultrasonic transducer An ultrasonic transducer which is suited to be placed in the place exposed to water, comprises an ultrasonic vibrator which transmits and receives ultrasonic wave, a horn which imparts directivity to the ultrasonic wave and a bent wave guide which connect... | 02/21/1984 |
| 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 |
| 4195523 | Ultrasonic thermometer An ultrasonic thermometer comprising a probe which is coupled to a magnetorestrictive transmitter and has discontinuities to reflect for each ultrasonic pulse applied to the probe a multiplicity of echoes of which the detection provides a measure of the a... | 04/01/1980 |
| 4149139 | Ultrasonic transmission device A method and apparatus for transmission of ultrasound to and reception of ultrasound from a fluid from outside its container. An ultrasonic transducer generates sound waves longitudinally in a transmission bar that has a reflecting surface at such an angl... | 04/10/1979 |
| 4101865 | Sonic echo-sounder for the measurement of levels of substances An acoustic echo-sounder arranged to determine the level of a substance in a container. The echo-sounder includes an acoustic transducer fitted to one end of an acoustic wave-guide, the acoustic impedance of which is progressively matched to the acoustic ... | 07/18/1978 |
| 3946831 | Acoustic transmitter A transmitter of acoustic energy which propagates that energy in a directional manner is described. An acoustic signal generator is connected at one end of an acoustic transmission line which exhibits a certain characteristic impedance. The line has a num... | 03/30/1976 |
