Accession Number : ADD012114

Title :   Expendable Underwater Acoustic Projector.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Hanson,Paul A ; Walton,James M

Report Date : 30 Apr 1985

Pagination or Media Count : 8

Abstract : An expendable sound source provides a cost effective projection of acoustic energies in the ocean. A tubular housing contains a d.c. motor that locates its shaft coaxial with the housing. Cylindircally-shaped camming blocks engage spurs in a pair of rigid pistons at both ends of the tubular housing of the camming surfaces and the motor speed. A flywheel on the shafts and journaling supports assure the projection of arbitrary waveforms and a key-and-keyway cooperation betweeen the housing and prevents the pistons turning in the housings. A self-contained, high energy battery pack is actuated by magnetic reed switch to assure reliable long term projection after deployment. Pressure compensation can be included. (Patents)

Descriptors :   *PATENTS, *UNDERWATER SOUND GENERATORS, EXPENDABLE, ELECTRIC MOTORS, DIRECT CURRENT, CAMS, PISTONS, FLYWHEELS, ELECTRIC BATTERIES, MAGNETIC DEVICES, SWITCHES

Subject Categories : Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE