Class 367/169 - Elongated continuous type

Subclass of Class 367 - Communications, electrical: acoustic wave systems and devices
Definition: Subject matter wherein a single transducer is composed of
No. of patents: 27
Last issue date: 02/22/2011

Number	Title	Issue Date
7894307	Acoustic projector having minimized mechanical stresses An acoustic projector which includes an outer shell formed of a reinforced epoxy resin having a longitudinal slot has an inner reinforcing liner formed of metal to reduce mechanical stress. The liner extends throughout the length of the outer shell and has a longitu...	02/22/2011
7609586	Acoustic projector having minimized mechanical stresses An acoustic projector which includes an outer shell (8) formed of a reinforced epoxy resin having a longitudinal slot (14) has an inner reinforcing liner (20) formed of metal to reduce stress. The liner (20) extends throughout the length ...	10/27/2009
5737279	Retractable sensor array system A retractable sensor array system is used to provide a large aperture sen array, such as a sonar array, that receives acoustic energy in a deployment medium. The retractable sensor array system includes one or more sensor array sheets having one or more ...	04/07/1998
5574699	Fiber optic lever towed array A small diameter towed acoustic line array comprising a plurality of miniature fiber optic lever hydrophones spaced at preselected locations along the array and held in place by fiber holders. The array hydrophones are enclosed within a tubular outer shea...	11/12/1996
5363342	High performance extended fiber optic hydrophone An acceleration insensitive interferometric hydrophone sensor having increased sensitivity comprises a rigid cylindrical support mandrel that is coaxial with and between thin walled sense and reference mandrels. Flanges on the reference and support mandre...	11/08/1994
5357486	Acoustic transducer A piezoelectric film strip is wrapped a plurality of times around a flexible inert mandrel that has standoff collars on each end. The film-wrapped mandrel is hermetically sealed inside a hollow rigid inert cylinder. Electrodes provide electrical communica...	10/18/1994
5257243	Flexible acoustic array with polymer hydrophones An acoustic array having polymer hydrophones is disclosed. The array compes a plastic roll, a plurality of polymer piezoelectric sensors affixed to the roll and electrodes that interconnect the sensors to utilization means such as those found for underwa...	10/26/1993
4984222	Piezoelectric sensor comprising at least one pair of flexible sensitive elements of great length A piezoelectric sensor comprising at least one pair of flexible sensitive elements of great length whose respective electrodes are connected in parallel. The interconnection is provided by interlacing the sensitive elements so that the two electrodes of e...	01/08/1991
4918666	Tubular piezo-electric sensor with high sensitivity A tubular piezo-electric sensor has at least one sensitive element disposed against an outer surface of a tubular support. A substance whose acoustic impedance is very different from that of the material forming the tubular support is disposed therein and...	04/17/1990
4876675	Towed piezoelectric cable A towed piezoelectric cable having a plurality of receiver element units which are arranged on a nonshrinking flexible core with leaving a buffer zone therebetween, each of said receiver element units having two piezoelectric elements which are polarized ...	10/24/1989
4849946	Piezo-electric transducer comprising several coaxial sensitive elements Piezoelectric transducer for the production of, for example, hydrophones, with the transducer including a plurality of sensitive coaxial elements interconnected so as to compensate for the effects of accelerations and deflections. A transducer includes at...	07/18/1989
4841494	Underwater piezoelectric arrangement Underwater piezoelectric arrangement in which it comprises two piezoelectric elements made of piezoelectric ceramic-polymer composites and juxtaposed to form a single layer structure, one of the element(s) having larger hydrophone constant than that of th...	06/20/1989
4809244	Support member for pressure sensor A support for an elongated piezoelectric pressure sensor, which is general cylindrical in shape is mounted on a hollow support member that has a thickness and strength selected to meet desired conditions. The elongated piezoelectric pressure sensor is wou...	02/28/1989
4768173	Pressure wave sensing device of the piezoelectric type with continuous structure and a method of manufacturing same A pressure wave sensor device is provided including at least two sensitive flexible piezoelectric elements wound in two helices in opposite directions of a tubular support and a method for manufacturing same, said device including a copper conducting ribb...	08/30/1988
4716556	Magnetostrictive acoustic transducer An acoustic transducer is provided that uses a layer of magnetostrictive ferromagnetic material having high magneto-mechanical coupling. The ferromagnetic material is adhered to a part of the outer surface of a resilient rod, so that an incident acoustic ...	12/29/1987
4703464	Permanent magnet biased magnetostrictive transducer A transducer which uses paramagnetic magnetostrictive rods or bars, e.g., compositions of the lanthanide series of elements such as Tb0.3 Dy0.7 Fe2, has the bars biased with a lengthwise flux by a permanent magnet, e.g. sa...	10/27/1987
4695988	Underwater piezoelectric arrangement Underwater piezoelectric arrangement in which it comprises two piezoelectric layers made of piezoelectric ceramic-polymer composites, one of the layers has larger hydrophone constant than that of the other layer, and by noise cancelling based on the speci...	09/22/1987
4688306	Method of preparing a piezoelectric device A piezoelectric device comprising a first conductor, a conductive polymer member which contacts the first conductor, a piezoelectric polymer member which contacts the conductive polymer member but which is separated from the first conductor and which has ...	08/25/1987
4689773	Extendible sonobuoy apparatus A sonobuoy has several components slidably mounted in an elongated tube. The components are longitudinally stacked one above the other at the lower end of the tube when the sonobuoy is in a pre-deployed state and are caused to slide longitudinally upwardl...	08/25/1987
4554650	Oil filled towed array hose without couplings A long, continuous, constant diameter, neutrally buoyant oil filled line array hose without couplings comprising a plastic inner hose having a layer of conducting and/or optical fibers wrapped helically around and bonded to the outer periphery along the n...	11/19/1985
4524436	Pressure wave fiber optic transducer cable A distributed microbending sensor cable is described comprising a core structure having discontinuities or ridges on its surface which ridges extend longitudinally of the core. An optical fiber is wrapped helically about the core in contact with the ridge...	06/18/1985
4497046	Long line hydrophone A long line hydrophone wound with a pair of bifilar ribbons that are connected to a constant current high frequency source....	01/29/1985
4405198	Extended fiber optic sensor using birefringent fibers An optical technique for detecting acoustic waves of selected frequency and determining their angle of arrival in a medium such as water. The technique utilizes one or more lengths of single mode optical fiber having a birefringence whose orthogonal axes ...	09/20/1983
4296487	Pressure sensitive line transducer A pressure sensitive line transducer wherein electrical signals are generd by the modulation of the electrical resistance of a coaxial cable due to pressure variations because of an impinging acoustic wave. The signals are extracted via a step-up transfo...	10/20/1981
4160229	Concentric tube hydrophone streamer Hydrophone streamer apparatus embodying concentric tube construction for achieving improved low noise operation is disclosed. A plurality of hydrophone elements are supported within a compliant inner tube at spaced intervals therealong by compliant mounti...	07/03/1979
4011540	Combined electret hydrophone and transmission line A continuous line hydrophone comprising a plurality of coaxial cable segments coupled by electronic circuit modules wherein the coaxial cable serves the functions of seismic detector, signal transmission line, and DC power supply line. In the preferred em...	03/08/1977
3990034	Towable VLF sonar projector A transverse variable reluctance transducer of acoustic energy is configu to lend itself to being towed through the water while it radiates acoustic energy. Its elongate, cylindrical shape, which has an axial tunnel running its length, allows the flow of...	11/02/1976

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Class 367/169 - Elongated continuous type