EP 0518685 A2 19921216 - Alarm assembly.
Title (en)
Alarm assembly.
Title (de)
Alarmanlage.
Title (fr)
Dispositif d'alarme.
Publication
Application
Priority
GB 9112878 A 19910614
Abstract (en)
An alarm assembly 10 comprises a housing attached to a back plate 12 to define a cavity occupied by a bell or siren and a tamper detection device. The tamper detection device 14 comprises a member 16 mounted for free movement in the cavity in more than one direction in response to a body entering the cavity or movement of the housing. The member 16 comprises a magnet 22 which is repelled by another magnet 40 so as to be movable between a metastable rest position and a disturbed position. A sensor 42 senses when the member 10 is in the disturbed position and causes the bell or siren to be set off.
IPC 1-7
IPC 8 full level
G08B 29/10 (2006.01); H01H 35/14 (2006.01)
CPC (source: EP)
G08B 29/10 (2013.01); H01H 35/147 (2013.01)
Designated contracting state (EPC)
BE DE ES FR GB GR NL PT SE
DOCDB simple family (publication)
EP 0518685 A2 19921216; EP 0518685 A3 19930512; GB 2258934 A 19930224; GB 2258934 B 19950510; GB 9112878 D0 19910731; GB 9212440 D0 19920722; IE 67629 B1 19960417; IE 921904 A1 19921216
DOCDB simple family (application)
EP 92305419 A 19920612; GB 9112878 A 19910614; GB 9212440 A 19920611; IE 921904 A 19920701