Accession Number : ADD003983

Title :   Pressure Insensitive System for Measuring the Length of a Cable Deployed Underwater Using Magnet Actuated Reed Switches.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Benya,John A ; McGuffey,Gale W

Report Date : 22 Mar 1977

Pagination or Media Count : 10

Abstract : A pressure insensitive counter for a towed array deployed underwater provides accurate readings of the deployment of the array from a winch. Several magnets are carried on the side of a fairlead sheeve to actuate associated reed switches as the magnets pass by them. The reed switches are oriented with respect to one another to provide binary coded decimal (BCD) signals which are fed to an electronic counter circuit carried inside of a pressurized hull. Mounting the reed switches inside of fluid filled conduits assures that the BCD signals are generated reliably. The electronic counter circuit assures a positive indication of how much of the array has been deployed. (Author)

Descriptors :   *Patents, *Sonar equipment, *Counters, *Towing cables, Deployment, Magnets, Coding, Cable assemblies, Towed sonar

Subject Categories : Electrical and Electronic Equipment
      Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE