Accession Number : ADD015328

Title :   Radial Damper Disk.

Descriptive Note : Patent, Filed 20 Dec 90, patented 17 Mar 92,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Snyderwine, Martha E ; Mahadevan, Saroja

Report Date : 17 Mar 1992

Pagination or Media Count : 8

Abstract : A motion dampening device is described that is efficiently and conveniently packaged with sonobuoy components to reduce the effects of vertical motion caused by surface waves or internal buoyant forces. A plurality of spring steel spokes connected by sections of thin plastic sheet are fitted around a central core around a first-deployed element. As this element is packed, prior to deployment, the spokes and plastic sheet are wrapped around the core. Upon deployment, the stored spring forces push open to their extended positions and spread the plastic sheet, thereby impeding vertical motion of the element and reducing effects of flow noise -on a sensor hanging therefrom.

Descriptors :   *SONOBUOYS, *UNDERWATER ACOUSTICS, *VERTICAL INDICATORS, CORES, DEPLOYMENT, FLOW, FLOW NOISE, INTERNAL, MOTION, NOISE, PLASTICS, SHEETS, STEEL, SURFACE WAVES, SURFACES, PATENTS, DAMPING, ACOUSTIC DETECTORS, MOTION, VERTICAL STABILIZERS

Subject Categories : Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE