Funnel construction for a dipping sonar

Details Funnel construction for a dipping sonar Funnel construction for a dipping sonar

1981-01-19

1983-06-14

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Underwater system

114244, 244137R, 367106, B63B 2116

Patent

active

043887090

ABSTRACT:
A funnel construction for a dipping sonar system carried in a helicopter includes the opening to a cylindrical housing of glass epoxy material for storing an underwater transducer which is deployed by suspending it into a body of water at the end of a thin cable. The housing opening includes a flared funnel structure including an entrance aperture member of thin wall aluminum alloy, a backing structure including a frustoconical strut member secured to the bottom of the helicopter and a resilient foam material positioned between and bonded to the entrance aperture member and the strut member which permits the entrance aperture member to move somewhat when impacted by the transducer. The aluminum alloy material in the entrance aperture is very light and yet transfers the heat of friction from rubbing of the small diameter cable against itself sufficiently rapidly that very little wear or damage is caused to either the cable or the funnel structure from repeated high speed reeling cycles.

REFERENCES:
patent: 3805977 (1974-04-01), Fritzsche et al.
patent: 4132973 (1979-01-01), Orme

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