EP 0087076 A1 19830831 - Grate with incorporated alarm system.
Title (en)
Grate with incorporated alarm system.
Title (de)
Gitter mit eingebautem Alarmsystem.
Title (fr)
Grille avec un système d'alarme incorporé.
Publication
Application
Priority
IT 8551982 A 19820219
Abstract (en)
Into a grate (1), suited to create a barrier in openings to be protected against burglary, and made of steel with tubes or structural shapes, several pairs of conductors (2, 3; 4, 5) are introduced, which cross it in the horizontal and vertical directions and also in the anchorages (10), the pairs of conductors (2, 3; 4, 5) close on a resistance located inside the grate (1) and are electrically connected to a balancing electronic circuit which intercepts any variation of the global resistance of the circuit. Any tampering or breaking of the bars of the grate (1) causes the breaking or the short circuit of the electric conductors (2-5) and, therefore, a variation of the resistance, which is felt by the balancing circuit, which allows the opening of a relay being connected to the alarm station causing its activation.
IPC 1-7
IPC 8 full level
E06B 9/01 (2006.01); G08B 13/02 (2006.01); G08B 13/12 (2006.01)
CPC (source: EP)
E06B 9/01 (2013.01); G08B 13/02 (2013.01); G08B 13/126 (2013.01)
Citation (search report)
- [Y] US 2374139 A 19450417 - SCHRINER OLIVER L
- [Y] DE 3006999 A1 19810924 - BLASER ERNST [DE]
- [A] DE 2653056 B2 19800911
- [A] DE 2925624 A1 19810115 - GEIGER MASCHF HELMUT
- [A] DE 2856819 A1 19800717 - TRETSCHOKS WILHELM
- [A] DE 367034 C 19230116 - JOHANNES HENGGI
Designated contracting state (EPC)
AT BE CH DE FR GB LI LU NL SE
DOCDB simple family (publication)
EP 0087076 A1 19830831; EP 0087076 B1 19860129; AT E17770 T1 19860215; DE 3361943 D1 19860313; IT 1193074 B 19880602; IT 8285519 A0 19820219
DOCDB simple family (application)
EP 83101279 A 19830210; AT 83101279 T 19830210; DE 3361943 T 19830210; IT 8551982 A 19820219