WARNING DEVICE

Abstract: A device (3) is arranged for alarming of a shutter (1) such as a door or window. The shutter (1) is bolted to a frame (2) by means of at least one locking bolt (23). The locking bolt (23) extends between the shutter (1) and the frame (2) via an intermediate air gap (30). The shutter (1) and the frame (2) have an outside (27) that is faced from a room (32) closed by the shutter (1). The device (3) comprises an alarm circuit (16) that bursts when affected by breaking and co-operation of the members that are included in the device (3). The mentioned device (3) is mounted on the outside of the frame (2) and/or the shutter (1) in connection with the longitudinal air gap (30) between the frame (2) and the shutter (1) on the lock side.

Description: WARNING DEVICE TECHNICAL FIELD The present invention relates to a device for alarming of a shutter such as a door or a window that are firmly locked to a frame by means of at least one locking bolt that extends between the shutter and the frame and via an intermediate gap, the shutter and the frame having an outside that is faced from a room closed by means of the shutter. BACKGROUND TECHNICS Devices for the alarming of e.g. doors are well known. Among other things they comprise means to register damage to the door leaf itself and means to detect movements of the door leaf in relation to the frame. Whereas the means of the invention may be permanently connected to an alarm circuit, that is to say even when opening the door for due passage, the latter means have to be connected to the alarm circuit only when no due passage of the door is to be done, that is to say, when the door has to be kept closed. This is a serious deficiency that on account of the necessary connection of the means to each from the alarm circuit when locking or opening the door involves an increased risk for false alarm or non-alarm. The deficiency gets all so much more serious if the last mentioned means are connected in series with other alarming means which leads to that the alarm circuit not allows the disconnection of separate means but only of the alarm circuit as a whole. A device of the first mentioned type has to be or may be connected as a separate alarm circuit to the alarm electronics in order to always be active as alarming means even if the other alarming means are shut off in order to e.g. during daytime protect a locked room as medicine storage or the data hall of the school . Another disadvantage with the known means that detect movements of a door leaf in relation to the frame belonging to it is that they often not alarm until the door practically has been forced open. For the burglar, however, the time it takes to force open a door always is a certain factor of insecurity. While certain doors are relatively easy to break, others may offer resistance under relatively long time. The known alarms of the type in question consider that fact of insecurity and start the alarm as mentioned not until the door has been forced open. A burglar therefor may count in to "work" undisturbed at first and then to get at least some minutes in a room that has been forced open before the alarm results in some measure from e.g. watchmen on the scene of the crime. DESCRIPTION OF THE INVENTION In the light of the above mentioned it is one of the objects of the present invention to achieve a warning device that is intended for alarm of e.g. a door and that may be permanently connected. Another object of the present invention is to achieve a warning device that alarms when only a slight damage is done to the door and a further object of the present invention is to achieve a warning device that may be relatively easy to be mounted on existing doors or frames without larger encroachments upon them. The above mentioned objects of the present invention are achieved by means of a device of the type according to the ingress and consists of a number of different members that in an attempted burglary with e.g. a crow bar in co-operation break a member of toughened glass and of one on this glass member formed electric loop as described in the Swedish patent application SE 9503821-2, or that cut a pre-stressed insulated wire with the similar function as the electric loop on the glass member, to be a part of a closed alarm loop connected to the alarm electronics . The mentioned member according to the invention is mounted on the frame or the outside of the shutter in connection with the gap that is between the shutter and the frame on the lock side. Thanks to the fact that the device according to the invention is not arranged to detect movements of the shutter in relation to the frame it may be permanently connected to an alarm circuit and minimises the risk for above mentioned reasons non-alarm or false alarm. Thanks to the fact that the device according to the invention furthermore not detects movements of the shutter in relation to the frame the alarm may be started in a very early stage of a burglary attempt when the included members are affected to break the loop that is part of the alarm circuit, in most cases burglary attempts in that stage may be prevented in that way. The members to be part of the device according to the invention are chosen from different function materials to co-operate with the included alarm loop as a whole in order to alarm in burglary attempts with e.g. a crow bar. Thanks to the mentioned glass member according to SE 9503821-2 or the insulated wire the mentioned members withstand safely and without being broken the shock load that results when e.g. a door or a window is shut. The members that are part of the invention guarantee that they in case of damage e.g. by means of a crow bar in co-operation affect that the insulated wire as alarm circuit or the glass member with included alarm circuit are broken. The device according to the invention is preferably mounted on the outer side in connection to the gap that always exists between frame and door or window. That placing of the device of the invention contributes to that in a burglary attempt the device in all probability will get in direct contact with the tool being used by the burglar and that the included members of the device affect the insulated wire to be cut off or the glass member to be broken before the door/window has become subject to more serious damage. Further features and characteristics concerning the present invention are evident from the description to the drawings below and from the claims . DESCRIPTION TO THE DRAWINGS The invention is described below as an example of an embodiment in connection with the enclosed drawings . Figure 1 shows a section of a door with a frame belonging to it seen from the estimated side of attack. Figure 2 shows a door seen from its outside and mounted upon the frame belonging to it members concerning the invention. Figure 3 shows a door with the frame belonging to it seen from its inside that is turned towards the room to be secured and the included cable for the connection of the alarm circuit to the alarm electronics. Figure 4 shows the door and the frame seen from above with parts of the wall and marking of the outside of the door or its inside in relation to the mounted member concerning the invention. Figure 5 shows a detail drawing of door, frame and members concerning the invention and their cooperation in a burglary attempt both concerning the contact surfaces and the direction of motion of a crow bar. Figure 6 shows an assembled part that is called alarm block and is part of the member concerning the invention. Figure 7 shows an assembled part that is called alarm block and is part of the member concerning the invention with an alternatively insulated wire as an alarm loop for the previous described alarm loop with a carrier of toughened glass. Even if the following description is limited to shutters and frames produced from different profile materials such as aluminium or steel in the shape of doors and frames, it is comprehensible that the device according to the invention is well adapted even for other types of materials in shutters and frames and also those that are not hinged such as sliding doors and covers. A door 1 is suspended pivotally on a frame 2 by means of hinge 29. The frame 2 is mounted in a wall 4 that surrounds a room 32 that is to be closed by means of a door 1. The door 1 , shown in the drawings , opens outwards, that is away from the room 32 and accordingly has an outside 27 and an inside 26. Between the door 1 and the frame 2 is on the outside 27 an air gap 30 on all sides of which in particular the vertical part that extends along the edge of the door 1, in which a lock device 22 is mounted, is important for the invention. Through that air gap 30 between the door 1 and the frame 2 extends accordingly a locking bolt 23 emanating from the lock device 22 into a striking-plate 33 on the frame 2, and the door 1 can only be broken if the locking bolt 23 e.g. by means of a crow bar is forced past the striking-plate 33 or if this is forced off the frame 2. That implies that a fc rglary attempt in which a crow bar is used, always will be aimed at the said air gap 30 and at the locking bolt 23 or the striking-plate 33. The invention consists of a warning device 3 comprising an alarm block 19. The alarm block 19 comprises an alarm ledge 12 and is enclosed in an outer cover profile 8, the edge side 37 of which extends along the air gap 30 on the outer side of the frame 2 and has means of attachment 24 in both ends which results in that the cover profile 8 gets a possible lateral motion that is at a maximum in the centre between the means of attachment 24. The upper side 34 of the cover profile 8 has got a corrugated design that creates a possibility to a motion of the edge side 37 that may replace the thought motion between the two attachments 24 of the cover profile 8, if that motion is blocked in some way. An alarm circuit 16 will start an alarm signal in a burglary attempt with the tip of a crow bar 6 placed in the air gap 30 against the door 1 and the bending edge 25 presses against the edge 37 before any motion in the opening direction between the door 1 and the frame 2 arises. The cover profile 8 has in the centre a recess 35 facing the frame 2 for the passage of a distance member 36. The recess 35 is laterally wider than the distance member 36 is and therefor the intended lateral motion of the edge 37 on the cover profile 8 is achieved attained even when the alarm block 19 including the distance member 35 is firmly fastened to the frame 2 by means of bolts 21 and distance tubes 20. The alarm block 19 consists of a bottom plate 13 with a distance member 36 fixed on the underside. On a bottom plate 13 screwed on and raised axles 14 form the centre of rotation for the slewing brackets 11 that on the opposite side from each centre of rotation have screwed on and raised axles 10. The free part of the axles 10, 14 above the slewing brackets has been provided with plastic bushes 9, 15 along all its length that corresponds to the thickness of the alarm ledge 12. The alarm ledge 12 has been placed on the top of the slewing brackets 11 between the plastic bushes 9, 15. On its short sides are found support plates 18 that determine the vertical position and the lengthways placement of the alarm ledge 12. In connection with compressive load from the edge side 37 against the plastic bush 9 with the axle 10 belonging to it, the slewing bracket 11 is moved around its centre of rotation or revolving axle 14. When the alarm ledge 12 is moved laterally until the plastic bush 15 with the axle 10 belonging to it stops further lateral movement, increases the load or pressure in the pressure point 38 from the edge side 37, the alarm ledge 12 will be broken off between the plastic bushes 9, 15 with the axles 10, 14 belonging to them. That leads to that the alarm circuit 16 being connected to the alarm electronics via insulated conduit wires 17 is broken, as a result of which the alarm will start. The breaking effect of the alarm ledge 12 arises when the crow bar 6 acts on the edge side 37 in a breaking direction as shown with an arrow on figure 5. Via the mechanical construction the movable pressure point 38 is placed along one long side of the alarm ledge 12 with a vertical displacement in relation to the firm pressure points 39 that are placed on the other side of the alarm ledge 12. When thus the movable pressure point 38 is influenced by the edge side 37 to be moved against the cross-direction of the alarm ledge 12, this will lead to that the toughened glass in the alarm ledge 12 will be granulated into pieces and the included circuit 16 will be broken. The attachment of the alarm ledge 12 in the alarm block 19 results in relatively large dispersion areas in granulation of the included glass that also guarantees a secure breaking function of the alarm circuit 16. There is plenty of space for the members included, if the alarm circuit 16 has to be secured against sabotage by U-linkage of the conduit wires 17. The included plastic bushes 9, 15 have the function to secure the longitudinal sides of the alarm ledge 12 in minor loads that may arise, if someone unintentional knocks against the cover strip 8. It has to be realised, that the alarm ledge 12 of toughened glass with included alarm circuit 16 may be replaced by another type of alarm circuit 16, such as e.g. is shown in figure 7, where an insulated conduit wire is the alarm circuit 16 that is broken in the above mentioned movements of the warning device 3 where the slewing brackets 11 with the pressure points 38, 39 may act on cutters-like members 40, 41 to cut the conduit wire with the function as the alarm circuit 16 so that the alarm electronics 28 may start the alarm. The alarm ledge 12 or other types of carriers of the alarm circuit 16 in the present invention are always arranged in a way, that the alarm circuit 16 connected via conduit wires 17 to the alarm electronics 28 always are a homogeneously closed circuit. LIST OF NUMBERS OF INCLUDED FUNCTIONS AND DETAILS 1. Doors or windows 2. Frame for a door or window 3. Device concerning the invention burglar alarm 4. Wall member 5. Cover lip on door of aluminium or plate 6. Crow bar 7. Breaking direction in attempted burglary 8. Cover profile with deformable upper side 9. Plastic bush 10. Axle threaded into slewing bracket 11. Slewing bracket 12. Alarm ledge 13. Bottom plate 14. Axle threaded into bottom plate 15. Plastic bush 16. Alarm circuit 17. Conduit wires insulated and firmly soldered on the alarm circuit 16 for connection to the alarm electronics 18. Support plates for the alarm glass ledge 19. Alarm block 20. Distance tube 21. Mounting bolt 22. Lock device 23. Locking bolt 24. Points of attachment for the cover profile 25. Bending edge 26. Inside of the door 27. Outside of the door faced to the side of attack 28. Alarm electronics 29. Hinge of the door 30. Air gap between door and frame 31. Door handle 32. Room 33. Striking-plate 34. Corrugated design 35. Recess 36. Distance member 37. Edge side of the cover profile 8 38. Movable pressure point 39. Firm pressure point 40. Cutters blade, outer, executes the cutting of the alarm circuit via agitation from the pressure points of the slewing bracket 41. Cutters blade, inner, fastened by the axles 14

Claims: CLAIMS 1. Device for alarming of a shutter (1) such as a door or a window, which shutter (1) is firmly locked to a frame (2) by means of at least one locking bolt (23) that extends between the shutter (1) and the frame (2) via an intermediate air gap (30) , the shutter (1) and the frame (2) having an outside (27) faced from a room (32) closed by means of the shutter (1) , characterised in that it includes an alarm block (19) that contents an alarm ledge (12) , that the alarm block (19) is enclosed in an elongated cover profile (8) showing an edge (37) faced to the air gap (30) and that alarm circuit breaking members (9, 10, 14, 15) are arranged in connection partly with the edge (37) on the cover strip (8) , partly with the alarm ledge (12) that may be brought to burst and break an alarm circuit (16) when a crow bar (6) or the like is applied into the air gap (30) and attempts are made to break up the shutter (1) when the cover profile (8) is bent or deformed. 2. Device according to claim 1, characterised in that the members breaking the alarm circuit comprise a first pressure member (9, 10) that is arranged on one side of the alarm ledge (12) and a second pressure member (14, 15) that is arranged on the other side of the alarm ledge (12) and that those two pressure members (9, 10 or 14, 15) are supported by a slewing bracket (11) that inclines to the longitudinal direction of the alarm ledge (12) . 3. Device according to claim 1 or 2 , characterised in that the device (3) is mounted on the locking side alongside the edge of the frame (2) and/or the shutter (1) in connection with the air gap (30) and that the cover profile (8) is attached at its ends in the frame (2) so that it may be bent sideways when the shutter (1) is affected by breaking. 4. Device according to any of the claims 1-3, characterised in that the cover profiles (8) show a shaped section (34) that has a spring action if the edge (37) is subject to agitation when the opposite side of the cover profile (8) is motion restrained. 5. Device according to any of the claims 1-4, characterised in that the pressure members (9, 10, 14, 15) may break alternate alarm circuits in order to start the alarm.

Inventors: SVENSSON LEIF, SVENSSON, LEIF
Applicants: SVENSSON LEIF, SVENSSON, LEIF
Application year: 1999
Main classification: G08B13
IPC codes: G08B13