EP 1783715 B1 20091118 - Piezoelectric alarm generator
Title (en)
Piezoelectric alarm generator
Title (de)
Piezoelektrischer Alarmerzeuger
Title (fr)
Emetteur d'alerte piézoélectrique
Publication
Application
Priority
DE 102005049491 A 20051013
Abstract (en)
[origin: EP1783715A2] The piezoelectric alarm generator (17) has a vibrating plate (35), a piezoelectric plate (37) attached to the vibrating plate and a divided electrode plate (38) partly covering the piezoelectric plate, whereby mechanical vibrations can be stimulated by applying a suitable alternating voltage between the plates. A microphone sub-panel (50) arranged the side of the electrode plate detects oscillations of the vibrating plate from deformations of the piezoelectric plate and feeds oscillation signals to a reporting circuit (20), which signals operation of the alarm generator.
IPC 8 full level
G08B 29/10 (2006.01); G10K 9/122 (2006.01)
CPC (source: EP)
G08B 29/10 (2013.01)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 1783715 A2 20070509; EP 1783715 A3 20080305; EP 1783715 B1 20091118; AT E449394 T1 20091215; DE 102005049491 A1 20070419; DE 502006005393 D1 20091231; ES 2337077 T3 20100420
DOCDB simple family (application)
EP 06121178 A 20060925; AT 06121178 T 20060925; DE 102005049491 A 20051013; DE 502006005393 T 20060925; ES 06121178 T 20060925