Resources Contact Us Home
Deployable sonar array with interconnected transducers operated in the bending mode

Image Number 3 for United States Patent #4208738.

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 section including an electronics and battery package for powering the transducer projectors; a main housing containing the stacked, interconnected transducer elements and having padding of foam material for protecting the transducer elements during deployment and handling; and a rear case section which contains a parachute to control rate and attitude of descent from the launching aircraft, a float or buoy in association with the parachute for providing flotation during operation, and a coiled length of nylon rope for suspending the deployed array at the desired distance below the surface. A retaining line or spring clips are used to hold the transducer elements in the main case section during descent in the water following separation of the rear case section and uncoiling of the nylon rope. When the housing reaches the end of the nylon rope, the resulting force acts to pull the transducer elements out of the main case section, breaking the retaining line and/or overcoming the force of the spring clips until the entire array is suspended in the ocean above the housing. A suitable time-responsive means operates to deflate the float or buoy when the array has completed its task.

  Recently Added Patents
Canopy light fixture
Remote management of networked systems using secure modular platform
Memory with separate read and write paths
Self-assembling surface coating
Apparatus and method to reduce noise in magnetic resonance imaging systems
Organic electroluminescent element
System of providing an internet web site that assists medical professionals draft a letter of medical necessity or other documentation for transmission to a third party payer on behalf of a pa
  Randomly Featured Patents
Methods and compositions for isolating nucleic acid
Invisible liner
Insulating fabric and method of manufacture thereof
Paper stacker device for receiving fanfold paper without assistance
Multicolor, multilayer dye-doner element for laser-induced thermal dye transfer
Battery full-charge detection for charge-and-play circuits
Motor having a fluid dynamic bearing with a radial capillary seal and re-circulation
Use of alkanoyl L-carnitines for the therapeutical treatment of chronic inflammatory bowel diseases
Grass treatment
Director chair storage rack