Accession Number : ADD003447

Title :   Towable VLF Sonar Projector.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Abbott,Frank R

Report Date : 02 Nov 1976

Pagination or Media Count : 13

Abstract : The patent relates to a transverse variable reluctance transducer of acoustic energy which is configured 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 cooling water to prevent excessive heat from building up. The transducer's linear vibrator motor has its outer shell windings DC excited while the inner core or reciprocator has its windings AC excited. As the AC source is changed from one frequency range to another, responsive changes in the projected acoustic signal are radiated from suitably interconnected projection surfaces.

Descriptors :   *Towed sonar, *Patents, Sonar projectors, Very low frequency, Sonar transducers, Water cooling

Subject Categories : Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE