Matches 151 - 200 out of 262 < 1 2 3 4 5 6 >
Match Document Document Title
4357688 Low cost sonobuoy  
A novel low cost air-launched sonobuoy having a spherical housing of a liweight semi-rigid foam housing encapsulated the electronic components. The housing includes recesses for receiving a...
4333169 Flow noise suppression system for a sonar dome  
Apparatus for suppression of water flow noises in connection with a keel nted sonar dome. A solution of water soluble polymer is ejected through a series of holes along the leading edge of the...
4330895 Stabilizer for reducing motion of an object disposed in a fluid  
A stabilizer or drogue, packageable in a minimal volume, which can be auttically deployed to dampen horizontal, vertical and rotational motion of a device, such as a hydrophone, operating in a...
4326275 Directional transducer  
A directional transducer is disclosed which includes flexural disc transducer elements mounted by their periphery to an inertial mass and connected to the transducer housing by their centers.
4323988 Sonobuoy system  
A deep water explosive echo ranging system capable of detecting high perfance submarines by using favorable acoustic paths available at deep depths. An umbrella hydrophone array is deployed from a...
4307457 Slamming-resistant sonar dome canoe  
A slamming-resistant sonar dome canoe is provided herein. The canoe generally consists of a shell, e.g., of fiberglass-reinforced plastic e.g., polyester resin with an extensive internal...
4300217 Acoustic transducer housing  
A housing for an acoustic transducer includes means for dispersing internal reflections within the housing to minimize the incidence of such internally reflected acoustic pulses on the transducer...
4298964 Towed deployment of acoustic arrays  
A compact, unitary sensor array support structure for use in a water medium omprises a plurality of scissor arms mounted on a support. The scissor arms are extended from the support to expand the...
4285485 Retractable sonar sensing system  
A readily retractable sonar sensor system having a sensor carried by a rod slidably mounted in a sleeve which is located in spaced relation to the axis of rotation of a disc upon which the sleeve...
4282590 Adjustable position sonar transducer depth finder  
An electronic depth finder apparatus is shown for use in fishing and/or navigation, and it includes a combined impulse control means and read-out, as well as a remote cooperating transducer...
4242744 Fixing of sonic transducer to a container  
Apparatus for fixing a sonic or ultrasonic transducer to a container. The transducer is arranged axially displaceable in the recess in a holder. A spring is mounted in the recess, which attempts to...
4229812 Apparatus for securing a ferroelectric stack to a weighted projection surface  
A coupling ring is bonded onto the opposite ends of a ferroelectric stack ving substantially the same thermal expansion coefficient as the stack. A thin film of silicone compound is wiped onto the...
4223428 Method and apparatus for securing a ferroelectric stack to a weighted projection surface  
A coupling ring is bonded onto the opposite ends of a ferroelectric stack ving substantially the same thermal expansion coefficient as the stack. A thin film of silicone compound is wiped onto the...
4208736 Hydrophone having a plurality of directional outputs  
A directional hydrophone comprises a plurality of coil elements each disposed in an air gap in a common magnetic circuit. In a first embodiment of the invention two coil elements each have a single...
4208738 Deployable sonar array with interconnected transducers operated in the bending mode  
A sonar array consists of a significant number of interconnected disk-shaped transducer projectors operating in the bending mode and packaged in a cylindrical housing including a first or lower...
4207621 Electrically steerable sonar system  
1. An underwater acoustic listening equipment for use in selectively estashing one of a number of narrow angle listening beams having good signal to noise ratio comprising: a spherical framework,...
4207626 Acoustic decoy and jammer  
1. In an expendable acoustic apparatus adapted to operate underwater as a coy and having an electrically driven noisemaker operative to generate sound waves of large amplitude over a broad band of...
4189703 System for deploying a sensor array from transiting vessel  
A system for deploying a vertical linear sensor array from a transiting vessel comprising a tubular deployment case closed at the bottom by a descent weight that is connected to a plurality of...
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...
4156228 Acoustic transducer with acoustic isolating mounting base  
An acoustic transducer for use under water is constructed in such a manner that when out of the water the transducer element is substantially isolated from vibrations that otherwise would be...
4152690 Flexible transducer mount  
Apparatus for mounting an acoustic transducer in connection with a boat to allow the transducer to be moved about beneath the water and thereby scan more than one direction. The apparatus comprises...
4144518 Stabilized-transducer driving device for underwater ultrasonic detection system  
A gravity stabilized drive mechanism varies the orientation of an underwater ultrasonic transducer in both azimuth and elevation while stabilizing the transducer against the pitching and rolling of...
4013990 Bellows caging mechanism for airborne hydrophone  
An airborne sonar system includes a transducer with both projecting elements and receiving elements designed for echo ranging at a moderately high frequency. Carried on the transducer housing is an...
4007436 Self-deploying instrument assembly  
A self-deploying instrument assembly includes a plurality of instruments for example hydrophones, mounted on a flexible sheet. A series of resilient rods extend from one side of the sheet from...
3992737 Suspension system for underwater equipment  
A system for suspending underwater equipment at a predetermined depth below the surface; the system providing storage means for the equipment prior to deployment, protection for the equipment...
3990123 Inflatable sonar array  
A portable submerged structure uses fluid pressure to extend a plurality of lexible conduits until the conduits become rigid. In such a rigid configuration the flexible conduits provide a rigid...
3980984 Underwater connector  
A connector assembly is disclosed which serves both to mount a piezoelectric element at a distance from an electronic housing and to complete an electrical circuit between them. The preferred form...
3980985 Suspension system for directional hydrophones  
A system for suspending a gradient hydrophone from a flotation member at the surface of a body of fluid by a single compliant member attached closely above the center of gravity of the hydrophone,...
3976274 Permanent attachment for suction cups  
A suction cup is configured to assure a permanent attachment of an instrutation package to a surface. A dish shaped body member is provided with an annular lip which resiliently engages this...
3973236 Horizontal hydrophone array  
A system for maintaining a two-legged hydrophone array in a horizontal plane is disclosed. This system uses a pair of directional maneuverable drogue chutes for providing tension on the hydrophone...
3949441 Shallow water moored buoy  
A shallow water moored buoy having an anchor retaining mechanism on a bot deck which automatically releases an anchor when the buoy strikes water. The buoy is filled with floatation material which...
3932834 Seismic transducer assembly for marshy terrains  
This invention relates to seismic transducer assemblies for converting compressional wave motion or acoustic energy into electric energy in a fluid medium such as is encountered in marshy terrains....
RE28671 Hydrophone damper assembly  
A damper for use in submerged hydrophone suspension systems including an elongated mass cylinder defined by a tube of flexible synthetic plastic film utilizing a check valve located at each end...
3886491 Expandable sonar array  
A transducer array for a dip sonar system is disclosed in which a central body is attached to a suspending cable and a substantial number of vertically oriented hydrophone staves are attached to...
3873959 SONAR WITH FLEXING DISTRIBUTION DEVICE FOR CONTINUOUSLY FLEXING CABLES  
A means for equally distributing the axial bending of continuously flexing onar transducer cables. Two transducer cables are elongated in parallel relationship with one another and one on top of...
3858165 ACOUSTICAL WINDOW FOR SONAR SYSTEMS  
In a sonar system an apparatus is utilized to transmit and receive signals. This apparatus is located within a housing and the signals must pass through a portion of the housing called an...
3833880 VERY LOW FREQUENCY SONAR PROJECTOR  
A low-cost projector of acoustic energy is fabricated from an elongate bl of wood provided with a cavity. A cover, also made of wood, is fitted over the cavity and a motor-driven rotary electric...
3818440 SEISMIC ENERGY GENERATOR FLOAT  
A float for carrying a seismic energy generator includes two side-by-side float assemblies, each of two enclosed tubes tapered at their front ends to facilitate towing, and wrapped lengthwise with...
3818425 NAVIGATION SYSTEMS UTILISING THE DOPPLER EFFECT  
Doppler sonar navigation system, comprising an on-board acoustic waves transmit and receive sound transducer device; transmission and reception take place in a manner known per se in four...
3793623 HYDRODYNAMIC STABILIZING DEVICE  
A configuration for high speed deployment and recovery of cable-suspended underwater devices makes use of a swivelable tail or shroud. The device shown is a generally cylindrical underwater sonar...
3791480 STRESS RELIEF INSERT FOR FLEXIBLE TOWED ARRAY  
A stress relief insert of a generally cylindrical shape having a small in diameter at one end and tapering out to a larger inner diameter at the other end. The insert is made of a flexible material...
3789401 FRAME FOR LOW FREQUENCY SOURCE  
A transducer array is supported by a plurality of interconnected longitudl and lateral fiber-glass members which terminate in a rigid, rectangular frame work defining the limits of a transducer...
3783443 EJECTABLE UNDERWATER SOUND SOURCE RECOVERY ASSEMBLY  
For ejectable mounting on a mobile device (e.g., a rocket) intended to travel over water to facilitate location and recovery of the device when submerged, an underwater sound source is mounted in a...
3781775 ROTATING STEREO SONAR MAPPING AND POSITIONING SYSTEM  
A stereo sonar system comprising a pair of pulsed sonar transducers mounted ne above the other on a stationary bottom frame. The transducers are rotated as a unit but are spaced sufficiently to...
3781780 NEUTRALLY BUOYANT INSTRUMENT SUSPENSION  
A hydrophone stabilizing device in which the hydrophone is maintained in tral buoyancy and in a stabilized attitude during low speed tow and while tethered is provided. The hydrophone is suspended...
3760346 HIGH-POWER UNDERWATER ELECTROACOUSTIC TRANSDUCER FOR THE INFRASONIC AND LOW AUDIO-FREQUENCY RANGE  
This disclosure is directed to a high power underwater electro-acoustic transducer operable in the infrasonic and low audio-frequency range.
3753219 TRANSDUCER MOUNTING ASSEMBLY  
A through-hull fitting having a spherical socket into which an electrical transducer mounted within a ball can be adjusted to position the transducer in a vertically aligned axis.
3752431 APPARATUS FOR MOUNTING A TRANSDUCER TO THE TRANSOM OF A BOAT  
This invention relates to apparatus for elevational control of a sonic transducer from the transom of a vessel. The configuration comprises means for mounting a sonic transducer upon a transom of a...
3744017 DIRECTIONAL HYDROPHONE  
A hydrophone for detecting low level sources of underwater pressure waves in the presence of ambient noise which includes a housing in which is mounted a magnetic structure having a radial air gap...
3742540 PASSIVE SONAR ARRAY MOUNTING AND RECOVERY APPARATUS  
A passive sonar array mounting and recovery apparatus comprising a frame t is mounted on a plurality of legs. A net is stretched across the interior region of the frame and is held in place with...
Matches 151 - 200 out of 262 < 1 2 3 4 5 6 >