EP 0582557 A2 19940209 - Piezomembrane constrained in the center and its employment to provide an acoustic howler.
Title (en)
Piezomembrane constrained in the center and its employment to provide an acoustic howler.
Title (de)
Zentereingeschränktes, piezoelektrisches Membran und ihre Anwendung zu einem Hauler.
Title (fr)
Membran piézo-électrique contrainte au centre et son utilisation comme hurleur.
Publication
Application
Priority
IT RM920591 A 19920805
Abstract (en)
A piezoelectrictric transducer device with a piezomembrane coupled, by means of a central pin, to a loading plate, which in turn is constrained on its external circumferance, is employed to provide an acoustic howler in which the loading plate is integrant part of the howler casing. <IMAGE>
IPC 1-7
IPC 8 full level
G10K 9/122 (2006.01)
CPC (source: EP)
G10K 9/122 (2013.01)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IE LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0582557 A2 19940209; EP 0582557 A3 19950118; IT 1262971 B 19960723; IT RM920591 A0 19920805; IT RM920591 A1 19940205
DOCDB simple family (application)
EP 93830348 A 19930803; IT RM920591 A 19920805