Underwater piezoelectric transducers

Communications: electrical – Selective – Interrogation response

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Details

340 12R, H04B 1300

Patent

active

040854000

ABSTRACT:
A piezoelectric transducer comprising a piezoelectric cylinder whose axis is coincident with the electrical axis and placed between two rigid pistons perpendicular to the axis and of greater diameter than that of the cylinder. The pistons carry electrodes on their external faces. The external faces and the lateral faces of the pistons are acoustically decoupled such that the only faces active are the peripheral surface of the cylinder and the inner surfaces of the pistons extending beyond the peripheral surface of the cylinder.

REFERENCES:
patent: 2613261 (1952-10-01), Massa
patent: 2650991 (1953-09-01), Ketchledge
patent: 2877432 (1959-03-01), Mattiat
patent: 2930912 (1960-03-01), Miller
patent: 3111595 (1963-11-01), Junger
patent: 3217288 (1965-11-01), Sims
patent: 3328752 (1967-06-01), Sims
patent: 3391385 (1968-07-01), Lubell
patent: 3617780 (1971-11-01), Benjaminson
patent: 3947802 (1976-03-01), Tims et al.

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