EP 0022831 B1 19830601 - ALARM DEVICE FOR DOORS
Title (en)
ALARM DEVICE FOR DOORS
Publication
Application
Priority
CH 99179 A 19790201
Abstract (en)
[origin: WO8001617A1] It is desired to avoid applying a voltage continously to a relay with an alarm set off by breaking of the current. It is also desired to arrange all the contacts on the door leaf. The device comprises, in series, an electrical supply (100), for example batteries, three switches (A, B, C) and a relay (110). The relay (110) is locked upon the simultaneous closing of the three switches and actuates an alarm circuit (120). The first and the second switches (A, B) are respectively closed and open when the door is closed and, vice-versa, open and closed when the door is wide open. However, they are simultaneously closed for the handling phase of the door (10) wherein, the door being just ajar, the bolt is necessarily retracted (28'). The third switch (C) is controlled by bolt (28) and closed except when the bolt is retracted.
IPC 1-7
IPC 8 full level
G21F 9/30 (2006.01); B09B 3/00 (2006.01); G08B 13/08 (2006.01)
CPC (source: EP US)
G08B 13/08 (2013.01 - EP US)
Designated contracting state (EPC)
AT CH DE FR GB LU NL SE
DOCDB simple family (publication)
WO 8001617 A1 19800807; AT E3676 T1 19830615; CH 627572 A5 19820115; DE 3063559 D1 19830707; EP 0022831 A1 19810128; EP 0022831 B1 19830601; JP S55501158 A 19801218; US 4370644 A 19830125; ZA 80566 B 19810225
DOCDB simple family (application)
CH 8000012 W 19800131; AT 80900233 T 19800131; CH 99179 A 19790201; DE 3063559 T 19800131; EP 80900233 A 19800815; JP 50012879 A 19791130; US 25297780 A 19801001; ZA 80566 A 19800130