Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent
1986-08-29
1987-11-10
Jordan, Charles T.
Communications, electrical: acoustic wave systems and devices
Signal transducers
Underwater type
367159, 367163, 367168, 310337, H01V 700
Patent
active
047062304
ABSTRACT:
Non-active columnar members are disposed on both sides of an active columnar member consisting of a piezoelectric ceramic material or a magnetically strainable material. Levers are connected to the active and non-active columnar members via first and second hinges. Convex shells are connected to the levers via third hinges. The displacement of the active columnar member is enlarged via the lever action, thereby enabling a miniaturized ultrasonic wave transmitter having high power capability.
REFERENCES:
patent: 3215977 (1965-11-01), Williams et al.
patent: 3449712 (1969-06-01), Angeloff
patent: 4384351 (1983-05-01), Pagliarini et al.
patent: 4420826 (1983-12-01), Marshall et al.
patent: 4432080 (1984-02-01), Wardle
patent: 4435794 (1984-03-01), Marshall et al.
patent: 4524693 (1985-06-01), McMahon et al.
Royster; "The Flextensional Concept: A New Approach to the Design of Underwater Acoustic Transducers"; Applied Acoustics, No. 2, 1970.
Pagliarini et al; "A Small, Wide-Band, Low-Frequency, High-Power Sound Source Utilizing the Flextensional Transducer Concept"; Conference: Oceans 78, The Ocean Challenge, Washington, D.C., 6-8 Sep. 1978.
Inoue Takeshi
Nada Takatoshi
Eldred John W.
Jordan Charles T.
NEC Corporation
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