Communications: electrical – Selective – Interrogation response
Patent
1976-04-20
1978-04-18
Tudor, Harold
Communications: electrical
Selective
Interrogation response
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.
Cluzel Philippe Henri Maurice
Quivy Michel Georges
Etat Francais
Tudor Harold
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