SE407635B - DEVICE FOR TRIGGING AN ALARM SIGNAL IN THE EVENT OF A THIEVE ALARM SYSTEM - Google Patents

Description

10 15 20 25 solar 35 40 7708007-5 Ks) When a magnetic diffuser described above is used in a window However, no burglary protection is obtained against crushing the glass at the window. This is a significant shortcoming of the above known burglar alarm system. 7 The present invention has for its object to provide a theft alarm system where an alarm signal is triggered even when a window is crushed. terruta.

This is achieved by a device which has subsequently obtained the characteristics of the claim.

An embodiment of the invention will be described below with reference to the accompanying drawings, in which Fig. 1 shows a plan view of a magnetic switch at a window fitted with the invention; Fig. Z shows a section along II-II in fig l; Fig. 3 shows on a larger scale a top view of the device according to the invention; and Fig. 4 shows in section the device according to the invention triggered.

Fig. 1 shows a magnetic switch comprising a first and a second element 1 and 2, respectively, which are mounted on two adjacent the window frames 3 and 4, which move away from each other when it one or both window frames are moved to the open position of the window. from the second element Z two lines 5 and 6 emanate, which are connected to a power source (not shown).

As is clearer also from Figs. Z and 3 are between the first element 1 and the window frame 3.fitted two plates 7 and 8, which ka are pivotable.connected to each other at one end by means and led 9. 7 As can be seen most clearly from Fig. 3, the plates 7 and 8 are at theirs opposite ends releasably connected by means of a pin 10, which runs in a channel 11 of the plate 8 and extends past a lug 12 of the plate 7, the plates 7 and 8 being kept compressed.

Fig. 2 shows a spring 12, which applies one to the plates 7 and 8 force to push them apart.

As shown in Fig. 1, a wire 14 extends from the pin 10. This wire 14 is pulled down towards the glass pane 15 of the window and is held against the box 15 by means of a tape 16, which has a channel 1? for the thread 14. At its end facing away from the pin 10, the trees are permanently attached in the frame 3 'by means of a suitable fastening means 18.

The burglar alarm system described above works in the following way.

When the window is opened and the elements applied to the window frames 3 and 4 elements 1 and 2 are removed from each other. the burglar alarm is triggered as w ___ _______..... v .. ~ 014 ....- e,., .., ...-_.__ 10 15 20 25 304 7708007-5 described above in the preamble to this patent application.

The novelty of the device according to the invention, i.e. the articulated bonded biased plates 7 and 8, provided is to the burglar alarm is triggered even if the window pane 15 is broken or removed.- In the event of damage to the window pane 15, the wire 14 will be stretched. the pin 10 being displaced to the left in Figs. 1 and 3.

In this case, see Fig. 3, the pin 10 will lose its engagement with the heel 12 and the plates 7 and 8 will be pressed apart by action of the spring 13. When the plate 7 is fixedly mounted on the frame 3 this means that the plate 8 and thus the first element 1 more to swing outward around the trail 9. Such a removal of it the first element 1 from the second element 2 causes the current in lines 5 and 6 are closed and the burglar alarm is triggered.

By providing the first element 1 with the articulated joints plates 7 and 8, a more complete burglar alarm is thus obtained. systems that prevent burglary both when opening a window and even when smashing the window pane. The described burglar alarm system as well as known alarm systems can be used in combination with windows and doors, all magnetic switches being connected to the same power source.

The above-described design of the device according to the invention one is just one example. Thus, for example, one can imagine that in instead of a hinged connection between the plates, the outer can the plate is displaced away from the inner plate by suitable guides. under the influence of a spring force.

Instead of using a spring force, you can imagine one small dynamite charge, which is then detonated when soluble the connection between the plates is canceled.

The invention can thus be freely varied within the scope of the following the following claims.

Claims (5)

.. »wo- .fl w ~ 7708007-5 u -PATENT CLAIMS ----“ Device for triggering an alarm signal in a burglar alarm system, which system comprises at least one magnetic switch consisting of a first (1 ) and a second (2) element, which are arranged in the vicinity of each other, the first element (1) comprising a magnet, while the second element (2) has two wires (emanating from the element (2) 5.6), which are connected to a * .source source1, and that the second element (2) further comprises means for providing a closed circuit through the lines (5,6) when the first and second elements (1,2 ) is removed from each other, characterized in that the device comprises two release means (7, 8), which by means of a locking device (10) are releasably connected to each other, means (14), which upon detection of intrusion affects the locking device (10) for canceling the releasable connection between the release means (7,8), and a force-applying means. (13), which is applied between the release means (7,8) to exert a depressing force thereon at least when the releasable connection between the release means (7,8) is released, and that the first (1) or the second (2) the element is applied to the part of one release member (8) which, upon cancellation of the releasable connection, is displaced away from the other release member (7). Device according to claim 1, characterized in that - the release means consist of two plates (7,8), which at their one ends are pivotally connected to each other by means of a joint (9). Device according to claim 1 or 2, characterized in that the means for canceling the releasable connection between the release means (7, 8) consists of a pin (10), which passes through a channel (11) of a (8) of the release means and is engaged with a lug (12) of the second (7) release member Device according to one or more of the preceding claims, characterized in that the means for canceling the releasable connection between the release means (7, 8) consists of a wire (14) arranged on a glass pane (15) of the window. , which is partly fixed in the locking device (10) and partly fixed in a locking device (3 ') of the window opposite the locking device. I _ _ 1 - 5. Device according to claim 4, characterized in that the wire is applied to the glass pane by means of a tape (16) provided with a channel (17) for receiving the wire (14). u-v- ___-_- STATED PUBLICATIONS: