EP 1316931 B1 20050518 - Acoustic device for warning detector
Title (en)
Acoustic device for warning detector
Title (de)
Akustischer Alarmgeber für einen Gefahrenmelder
Title (fr)
Emetteur acoustique pour avertisseur de risque
Publication
Application
Priority
EP 01128683 A 20011201
Abstract (en)
[origin: EP1316931A1] The acoustic alarm sender has a piezo acoustic sender (1) and a circuit driving it with at least one transistor (2,3), an arrangement for generating control pulses (I1,I2) for the transistor(s) as well as an inductance (5) connected in series with the piezo acoustic sender. Two transistors can be provided, each operated with a series of control pulses.
IPC 1-7
G08B 1/08; G08B 3/10; G08B 7/06; H04R 17/00; H04R 17/10; B06B 1/02
IPC 8 full level
B06B 1/02 (2006.01); G08B 3/10 (2006.01); H04R 27/00 (2006.01)
CPC (source: EP)
B06B 1/0215 (2013.01); G08B 3/10 (2013.01); H04R 27/00 (2013.01); B06B 2201/55 (2013.01)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
EP 1316931 A1 20030604; EP 1316931 B1 20050518; AT E295981 T1 20050615; DE 50106265 D1 20050623; ES 2242701 T3 20051116; PT 1316931 E 20050930
DOCDB simple family (application)
EP 01128683 A 20011201; AT 01128683 T 20011201; DE 50106265 T 20011201; ES 01128683 T 20011201; PT 01128683 T 20011201