EP 0486018 A1 19920520 - Intruder detector.
Title (en)
Intruder detector.
Title (de)
Einbruch-Detektor.
Title (fr)
Détecteur d'intrus.
Publication
Application
Priority
DE 4036617 A 19901116
Abstract (en)
A description is given of an intruder detector having two different detecting devices (10,30) for the same security zone, which triggers an alarm only if both detecting devices respond in a specific way, one detecting device being a glass breakage detecting device which comprises a glass breakage detector (30) and a bandpass filter (35) and the other detecting device being a pressure fluctuation detecting device which comprises a pressure detector (10) and a second bandpass filter (15), it being possible for the pressure detector and the glass breakage detector to be formed by a single sensing element. An alarm is triggered only if both detecting devices are addressed in specific frequency bands. <IMAGE>
IPC 1-7
IPC 8 full level
G08B 13/02 (2006.01); G08B 13/04 (2006.01); G08B 13/16 (2006.01); G08B 19/00 (2006.01); G08B 23/00 (2006.01); G08B 25/04 (2006.01)
CPC (source: EP KR)
G08B 13/04 (2013.01 - EP); G08B 13/1681 (2013.01 - EP); G08B 13/189 (2013.01 - KR)
Citation (search report)
- [Y] US 4928085 A 19900522 - DURAND III ELDEN E [US], et al
- [Y] GB 2171518 A 19860828 - AUTOMATED SECURITY HOLDINGS
- [A] US 4853677 A 19890801 - YARBROUGH ALFRED E [US], et al
Designated contracting state (EPC)
BE DE ES FR GB IT LU NL
DOCDB simple family (publication)
EP 0486018 A1 19920520; EP 0486018 B1 19970212; DE 4036617 A1 19920521; DE 69124661 D1 19970327; DE 69124661 T2 19970904; JP H0620164 A 19940128; KR 920010519 A 19920626
DOCDB simple family (application)
EP 91119446 A 19911114; DE 4036617 A 19901116; DE 69124661 T 19911114; JP 32807291 A 19911115; KR 910020319 A 19911115