EP 0251599 A3 19890426 - ACOUSTIC TRANSDUCER
Title (en)
ACOUSTIC TRANSDUCER
Publication
Application
Priority
GB 8614940 A 19860619
Abstract (en)
[origin: EP0251599A2] An acoustic transducer l comprises a piezoelectric material 4 having a linear shape and which is arranged in the form of a flat spiral within a body 2 of encapsulant material. The piezoelectric material may be a polyvinylidine fluoride coaxial cable and this thus can allow the construction of a high performance planar hydrophone at relatively low cost.
IPC 1-7
IPC 8 full level
B06B 1/06 (2006.01); H04R 17/00 (2006.01)
CPC (source: EP)
B06B 1/0688 (2013.01); H04R 17/00 (2013.01)
Citation (search report)
- [A] EP 0174897 A2 19860319 - NGK SPARK PLUG CO [JP]
- [A] GB 701962 A 19540106 - ZENITH RADIO CORP
- [A] FR 2119482 A5 19720804 - KI
- [X] PATENT ABSTRACTS OF JAPAN, vol. 10, no. 137 (E-405)[2194], 21st May 1986; & JP-A-60 264 200 (SHIMADA RIKA KOGYO K.K.) 27-12-1985
Designated contracting state (EPC)
BE CH DE ES FR GR IT LI NL SE
DOCDB simple family (publication)
EP 0251599 A2 19880107; EP 0251599 A3 19890426; GB 2191909 A 19871223; GB 2191909 B 19891220; GB 8614940 D0 19861029
DOCDB simple family (application)
EP 87305474 A 19870619; GB 8614940 A 19860619