EP 0707296 B1 19990728 - Electronic article surveillance system
Title (en)
Electronic article surveillance system
Title (de)
Anlage zur elektronischen Artikelüberwachung
Title (fr)
Système de surveillance électronique d'objets
Publication
Application
Priority
DE 4436977 A 19941015
Abstract (en)
[origin: EP0707296A1] The electronic monitoring and alarm system is used to provide protection against the theft of articles. The system has a voltage controlled oscillator (2) that connects with a power amplifier (3) that outputs a signal to a transmitter (4) to create an electromagnetic field. The field produced interacts with a security hanger element (5) attached to the article that forms part of a resonator circuit. A receiver (6) responds to provide an input to a detector (7) coupled to an alarm (8) and responds to both amplitude and phase changes. If the article is passed through the field with the hanger attached the alarm is triggered.
IPC 1-7
IPC 8 full level
G08B 13/24 (2006.01)
CPC (source: EP)
G08B 13/2414 (2013.01); G08B 13/2482 (2013.01)
Designated contracting state (EPC)
AT BE CH DE ES FR GB LI NL PT SE
DOCDB simple family (publication)
EP 0707296 A1 19960417; EP 0707296 B1 19990728; AT E182708 T1 19990815; AU 3421295 A 19960502; AU 684389 B2 19971211; DE 4436977 A1 19960418; DE 59506460 D1 19990902; ES 2135637 T3 19991101
DOCDB simple family (application)
EP 95114703 A 19950919; AT 95114703 T 19950919; AU 3421295 A 19951012; DE 4436977 A 19941015; DE 59506460 T 19950919; ES 95114703 T 19950919