EP 0349565 B1 19931013 - ALARM APPARATUS, PREFERABLY IN A WINDOW STRUCTURE
Title (en)
ALARM APPARATUS, PREFERABLY IN A WINDOW STRUCTURE
Publication
Application
Priority
SE 8700952 A 19870306
Abstract (en)
[origin: WO8806774A1] The invention relates to an alarm apparatus, preferably in a window structure, and including at least one glass pane (1) or similar sheet-like element. The alarm apparatus comprises at least one transmitter (6) of impulses, e.g. ultrasound, mounted at a first place on a glass pane (1) so that it can be subjected to said impulses, and at least one receiver (7) of the impulses transmitted in the pane (1), and mounted at an other place on the pane for registering impulses received from it, an alarm connected to the receiver (7) being triggerable when the impulses received from the pane (1) change, e.g. when the pane (1) is broken.
IPC 1-7
IPC 8 full level
G08B 13/04 (2006.01); G08B 13/16 (2006.01)
CPC (source: EP)
G08B 13/04 (2013.01); G08B 13/1618 (2013.01)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
WO 8806774 A1 19880907; AU 1397888 A 19880926; DE 3884943 D1 19931118; DE 3884943 T2 19940511; EP 0349565 A1 19900110; EP 0349565 B1 19931013; FI 894188 A0 19890905; FI 98964 B 19970530; FI 98964 C 19970910; SE 456951 B 19881114; SE 8700952 D0 19870306; SE 8700952 L 19880907
DOCDB simple family (application)
SE 8800105 W 19880307; AU 1397888 A 19880307; DE 3884943 T 19880307; EP 88902594 A 19880307; FI 894188 A 19890905; SE 8700952 A 19870306