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| Number | Title | Issue Date |
| 4739860 | Ultrasonic rangefinder An ultrasonic rangefinder capable of detecting a distance between a vehicle and an object with high accuracy is shown. The measurements for microphones for transmitting and receiving ultrasonic waves are chosen so that detour waves are restricted.... | 04/26/1988 |
| 4725994 | Ultrasonic transducer with a multiple-folded piezoelectric polymer film An ultrasonic transducer includes a piezoelectric polymer film folded as at least two layers and having electrodes on both the surfaces thereof. The ultrasonic transducer is responsive to a signal, applied across electrodes, to produce an ultrasonic wave ... | 02/16/1988 |
| 4713799 | Ultrasonic horn with sidelobe suppressing centerpiece An ultrasonic horn assembly includes a horn with a bore tapering from a throat out to a mouth. An ultrasonic transducer is mounted in the throat of the horn. A beam narrowing insert includes a headpiece which tapers smoothly from a larger diameter base to... | 12/15/1987 |
| 4703174 | Fiberoptic temperature/pressure sensor system A fiberoptic sensing system comprising a light source, a sensor responsive to external stimulus, an optical fiber connected to the light source and the sensor, a detector arranged to receive light from the optical fiber, and output electronics electricall... | 10/27/1987 |
| 4695986 | Ultrasonic transducer component and process for making the same and assembly Ultrasonic transducer assembly having a piston with a substantially planar surface formed of a conducting material. An insulating foil element having first and second surfaces overlying the substantially planar surface of the piston. The foil has a conduc... | 09/22/1987 |
| 4695985 | Apparatus for preventing a roundabout of supersonic wave in a supersonic wave transmitter and receiver for a vehicle A cylindrical member for preventing a roundabout of the supersonic wave is arranged around the transmitting and receiving opening of one of the sender or receiver of a supersonic wave device for a vehicle which is installed on the vehicle. Thereby the phe... | 09/22/1987 |
| 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 |
| 4678905 | Optical sensors for detecting physical parameters utilizing vibrating piezoelectric elements To detect a physical parameter such as pressure, temperature, acceleration or force, the physical parameter is allowed to influence the movement of a light transmitting piezoelectric member. Light is supplied to the member and the member is vibrated in a ... | 07/07/1987 |
| 4655220 | Apparatus for contactless fragmentation of concrements in vivo The invention relates to an apparatus for the contactless fragmentation of a concrement present in the body of a living being. A shock wave generator is aimed at a target region in the body and includes a coil having the form of a spherical segment. In fr... | 04/07/1987 |
| 4654834 | Weatherproofed ultrasonic transducer assembly and systems incorporating same An ultrasonic transducer assembly incorporating an ultrasonic transducer and conically surfaced beam transformer wherein the conical surface of the beam transformer is mounted on the interior of closure means or end cap that seals the transducer (and any ... | 03/31/1987 |
| 4651310 | Polymeric piezoelectric ultrasonic probe There is disclosed a polymeric piezoelectric ultrasonic probe using a polymeric piezoelectric member which comprises a polymeric piezoelectric member; a common electrode formed on one surface of the polymeric piezoelectric member; and electrodes for drivi... | 03/17/1987 |
| 4639904 | Sonic transmitters A sound transmitter for generation of transient acoustic pulses, comprising a spatially curved focussing emitter surface which is represented by the area of a single active or passive emitter or by the areas of several emitters matched in respect of their... | 01/27/1987 |
| 4636997 | Ultrasonic transducer An ultrasonic transducer comprises a cylindrical housing embedded within a rear bumper of a vehicle and opening backward, a reflecting plate having a parabolic reflecting surface provided within the cylindrical housing along a closed end thereof and facin... | 01/13/1987 |
| 4635198 | Apparatus for measuring cross-sections on objects, more especially on parts of the body Sound heads (SK1 to SK3) are fixed, distributed peripherally, on the part of the body, e.g. an arm or leg. Each of the sound heads is able to transmit ultrasonic signals along a measuring section (MS1 to MS3) leading to another sound head, which signals a... | 01/06/1987 |
| 4616235 | External acoustic absorber for ink jet printer There is described an acoustic absorber for an ink jet printer using a waveguide to generate ink drops. The absorber comprises a sheet of elastomer disposed on the orifice plate between the orifice plate and the charge plate of the printer, and a diffuser... | 10/07/1986 |
| 4593385 | Fiber optic sensor lead fiber noise cancellation An optoacoustic hydrophone for detection of acoustic waves in a fluid such as sea water. The hydrophone includes an optical waveguide comprising a fiber optic input lead, a fiber optic sensor, and a fiber optic exit lead, an optical subassembly and a sign... | 06/03/1986 |
| 4581727 | Finding the direction of a sound An apparatus and method for detecting the direction of a sound. A thin shell structure is permitted to flex in response to incident sound and perturb the form of the shell. The perturbation is detected and from this the direction of the sound can be deter... | 04/08/1986 |
| 4581685 | Ultrasonic transducer An ultrasonic transducer having an ultrasonic vibrator for transmitting and receiving ultrasonic waves, and a reflecting plate for imparting directivity to the ultrasonic waves transmitted by the ultrasonic vibrator and for converging the received ultraso... | 04/08/1986 |
| 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 |
| 4545253 | Fiber optical modulator and data multiplexer A data gathering system comprising a single optical fiber having one or more modulators formed thereon, means for launching into the fiber an interrogating light pulse which propagates in a first direction, means for generating at each modulator an optica... | 10/08/1985 |
| 4530077 | Efficient low cost transducer system A low cost, efficient, ultrasonic transducer and method comprises a narrow beam electrostatic transducer and a beam transformer operated in air for expanding the emitted beam of the electrostatic transducer relative to a single axis. The beam transformer ... | 07/16/1985 |
| 4527419 | Sensor for underground duct probe A sensor for use on the front end of a flexible, resilient probe for use in an underground duct of the type which contains one or more current-carrying cables. The sensor is provided with a signal generating device for detecting a particular operating con... | 07/09/1985 |
| 4525817 | Acoustic resistor in an electroacoustic transducer An acoustic resistor placed at a tone aperture portion of an electroacoustic transducer is made of a mesh, a part of which is filled with a filler to create an acoustically opaque portion at which the acoustic resistor is secured to the tone aperture port... | 06/25/1985 |
| 4519252 | Pressure and temperature compensated photoelastic hydrophone An acoustic sensor with ambient pressure and temperature compensation having a photoelastic element positioned between a diaphragm and a support beam. Thin layers of oil between the photoelastic material and both the diaphragm and support beam prevent sur... | 05/28/1985 |
| 4518857 | Temperature and pressure compensated elasto-optic sensor A pressure and temperature compensated acoustic transducer utilizing a pressure sensitive birefringent element coupled between a flexible diaphragm sealing the transducer and an internal variable rigid diaphragm that forms two internal chambers. Relativel... | 05/21/1985 |
| 4509153 | Resolution transducers, systems and methods for the transmission and/or reception of waves propagated by vibration Problems of resolution and focussing arise in the near field in systems employing radiation, including ultrasonic systems. These problems can be alleviated by suppressing the plane waves in the combination of plane waves and edge waves usually employed. S... | 04/02/1985 |
| 4490814 | Sonic autofocus camera having variable sonic beamwidth A photographic camera having a plurality of interchangeable, adjustable focus lenses and having a focus control system capable of focusing each such lens over a range of subject distances in response to a rangefinder derived signal is provided with a soni... | 12/25/1984 |
| 4486868 | Ultrasonic wave conversion apparatus An ultrasonic wave conversion apparatus comprises electrodes, a support member for supporting the electrodes, a vibrator secured to the support member by a securing member, and a moving diaphragm fixed to the vibrator by a fixing member. The surface of po... | 12/04/1984 |
| 4485322 | Ultrasonic transducer Provided is an ultrasonic transducer having a resonator which defines a space together with a bimorph cell disposed in the ultrasonic transducer. The space is fluid-tightly closed by the top portion of the resonator, thereby to keep water, such as for exa... | 11/27/1984 |
| 4482805 | Fiber optic matrix multiplier A matrix multiplier system incorporating an integrated fiber optic coupling array in combination with an arrangement for individually modulating the signals on the respective optical fiber transmission lines to develop the matrix multiplication. Each of t... | 11/13/1984 |
| 4473863 | Apparatus for and method of making an electret tape Apparatus for making an electret tape having an electrically conductive strip with a dielectric layer on one side thereof comprises tape supply and take-up reels arranged to move the tape from the former to the latter in an upwardly inclined plane and an ... | 09/25/1984 |
| 4463453 | Acoustic intensity measurement apparatus and method including probe having ambient noise shield Acoustic intensity measuring apparatus for determining sound energy intensity utilizing a probe having a pair of microphones and an associated ambient noise shield.... | 07/31/1984 |
| 4461536 | Fiber coupler displacement transducer A transducer for the measurement of minute displacements incorporates a fiber optic coupler having a coupling efficiency which varies in relation to the relative position of coupler elements. The transducer may also be used indirectly as an accurate senso... | 07/24/1984 |
| 4458170 | Ultrasonic transmitter-receiver An ultrasonic transmitter-receiver is characterized in that a diaphragm is disposed at the center of a laminated piezo-electric element and the periphery of the diaphragm is flexibly fixed in a housing through a buffer member of elastic rubber or the like... | 07/03/1984 |
| 4456848 | Ultrasonic transmitting and receiving device An ultrasonic transmitting and receiving device comprises a bimorph vibrator including two piezoelectric elements each connected electrically to the corresponding one of a plurality of terminals for receiving and delivering electric signals and a metallic... | 06/26/1984 |
| 4449210 | Fiber optic hydrophone transducers Apparatus is provided including a light source, a transducer and a detector, which is capable of detecting applied acoustic signals. The transducer employs first and second ridged members which have parallel rippled surfaces which contact opposite sides o... | 05/15/1984 |
| 4440482 | Sonic autofocus camera having variable sonic beamwidth A photographic camera having a plurality of interchangeable, adjustable focus lenses and having a focus control system capable of focusing each such lens over a range of subject distances in response to a rangefinder derived signal is provided with a soni... | 04/03/1984 |
| 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 |
| 4421384 | Fiber optic transducer A fiber optic transducer is provided by cutting and polishing the ends of two optical fibers, having equal indexes of refraction, at angles with respect to their axis such that all light signals propagating within the optical fibers are incident to the en... | 12/20/1983 |
| 4408829 | Fiber optic transducers Method and apparatus for detecting and converting pressure signals to modulated light signals by microbending optical fibers as a function of the pressure signals. Transducers are described which include a length of multimode optical fiber supported at sp... | 10/11/1983 |
