Signaling device for burglary prevention system

The subject of the invention is a signaling device for burglary prevention system, which serves for sensing the intactness of the cylinderlock insert and in case of breaking of the cylinderlock insert it signals the unauthorized entrance to the doors and other closing fixtures provided with cylinderlock inserts.

The protection of properconnectings, prevention of illegal entrance mean more and more important task for the owners, respectively for the companies developing and operating security systems. Most illegal entrances into the properconnectings takes place through closing fixtures, mainly through doors. For example in case of blocks of flats entrance to the flats is possible only through the doors. So the attention of experts dealing with security systems is focused primarily on the protection and reinforcement of entrance doors, as well as on the timely removal of the people entering illegally with the help of alarm system installed in the flat.

However one of the drawbacks of the alarm systems developed this way is, that the alarm takes place only when the intruders are inside the property, so after the alarm the guards find nobody on the site, even the intruders can lay hands on values within this short time, or even cause considerable damages. An important part of the protection against intrusion is the reinforcement, respectively protection of the entrance doors. A principle factor of the safety of the doors is the safety of the lock itself and the safety of parts of the lock-structure. Resulting from it one of the main issues is the cylinderlock insert commonly used in locks. The cylinderlock insert is quite a vulnerable structure, as due to its principle there is a threaded bore in the middle of the structure. The bore serves for fixing and positioning of the cylinderlock insert in the lock-structure. The cylinderlock insert is however a structure weakened in the middle by the threaded bore there. The built-in cylinderlock insert can be easily broken with the help of a suitable tool, then lifting the broken part of the cylinderlock insert out of the door, the door can be opened with the lock itself with the help of a simple device.

In the state of the art various solutions are known for the protection of doors and closing fixtures provided with cylinderlock insert. The patent description DE 103 25 731 describes an alarm system for the cylinderlock insert, which serves the protection of the house- and/or flat doors and closing fixtures of other spaces to be protected against breaking in. The unit can be built in subsequently to the cylinderlock insert and it has to be placed to the cylinder before building-in. The unit uses electric current for the first time at breaking, or during forced entrance. The essence of the solution is, that an insert made of insulating material with conducting layers on two sides is fixed on the cylinderlock insert. The conducting layers are connected to an alarming circuit. In case of breaking or deformation of the cylinderlock insert the insulating insert gets damages or deforms, and the conducting layers close the circuit of the alarm system, resulting in sounding the alarm.

The utility model DE 203 07 803 Ul makes known a safety cylinderlock insert. The cylinderlock insert is of special ellipse shape, so the lock offers greater safety against manipulations. To further increase safety there is an electrically conductive material in the bore in the lock, which triggers an alarm system in case of forceful impact. In case of thermic impact, for example in case of manipulation of a fire safety door the unit also generates alarm by establishing electrical contact in the conductive material. The outer cover plate of the lock is fixed with screws from the inner side of the door in such a way, that the screws and the outer cover plate form a circuit together. The forceful manipulation or removal of the cover plate causes the circuit to break, which also generates alarm.

The utility model DE 203 07 828 Ul describes a screw fixing cylinderlock insert serving protection of houses, flats or other real estates against breaking in. The screw is made of plastic and inside the screw lengthwise there are two conductive parts built-in joining to the sensor circuit of an alarm system. In case of forceful impact on the cylinderlock insert the conductive parts close due to the deformation of the screw triggering alarm.

The patent descriptions US 4 656 851, US 4 328 692, DE 199 43 608, RU 2 107 794 and HU 194 356 make known solutions to prevent unauthorized entrance as well as to increase the safety of cylinderlock inserts.

The main deficiency of the above mentioned and practically used solutions is, that in case of the manipulation of the cylinderlock insert by unauthorized intruders, respectively in case of the breaking of the cylinderlock insert they do not offer sufficient safety, sensing of the intrusion and triggering the alarm do not always take place.

When working out the solution according to the invention we aimed to create such a structure, which makes possible, that in case of the manipulation of the cylinderlock insert placed in the closing fixtures by unauthorized intruders and in case of the subsequent breaking and removal of the cylinderlock insert signal for the safety system. It makes possible the instant sensing of the intrusion attempt and taking steps against the unauthorized intruders as soon as possible, respectively it can arrest the intruders themselves to continue intrusion, to get in to the protected property or room.

When working out the solution according to the invention we realized, that in case between the two ends of the cylinderlock insert in the body of the insert a continually closed monitoring circuit of small current intensity is created, which monitoring circuit is broken if the cylinderlock insert breaks, and so the body of the cylinderlock insert is connected to the sensor circuit of an alarm system, which signals if the circuit breaks, then the set aim can be achieved.

The invention is a signaling device for burglary prevention system with electrical bodylock sensors placed on the cylinderlock insert joining an alarm system through wires, which is characterized by that, the bodylock sensors made of conductive material, placed on the cylinderlock insert, on the outer and inner side of the door or closing fixture, below the outer cover and the inner cover are located in external and internal

sensor houses taking the shape of the cross-section of the cylinderlock insert in such a way, that the bodylock sensors are in electrical connection with the cylinderlock insert and they form part of the monitoring circuit of the alarm unit established through the cylinderlock insert.

In one preferred embodiment of the solution according to the invention there is placed a cover sensor on the external sensor house below the outer cover joining mechanically with the outer cover on the outer part of the door or closing fixture.

In another preferred embodiment of the solution according to the invention the bodylock sensors located in the sensor houses are placed in the preferably threaded bore formed in the sensor houses.

In a further preferred embodiment of the solution according to the invention the bodylock sensors consist of a sleeve made of conductive material provided with external and internal threads, and a grub screw with pointed end located in the threaded inside of the sleeve.

In a further preferred embodiment of the solution according to the invention the material of the sensor houses is flexible plastic, in given case polyethylene.

In a further preferred embodiment of the solution according to the invention the cover sensor is in given case a microswitch provided with a push-button.

In a further preferred embodiment of the solution according to the invention the cover sensor and the bodylock sensors are connected to the different circuits of the alarm unit in two zones connecting-up.

In a further preferred embodiment of the solution according to the invention the cover sensor and the bodylock sensors are series-connected to one circuit of the alarm unit in one zone connecting-up.

In a further preferred embodiment of the solution according to the invention the sensor houses are placed on the surface of the door or the closing fixture.

In a further preferred embodiment of the solution according to the invention the sensor houses are placed in the nests formed in the surface of the door or the closing fixture.

The solution according to the invention is further set forth by the attached drawings:

The Fig.1 shows the solution according to the invention in fixed, built-in state partly in section, with the sensor houses placed on the surface of the door.

The Fig. 2 shows the solution according to the invention in fixed, built-in state partly in section, with the sensor houses placed in the nests sunk into the door.

The Fig.3 shows the internal sensor house in front view partly with break-out.

The Fig.4 shows the internal sensor house in side-view.

The Fig.5 shows the external sensor house in front view.

The Fig.6 shows the external sensor house in side-view.

The Fig.7 shows the enlarged view of part ,,A" of the Fig.3.

The Fig.8 shows connection of electrical contacts in case of two zones connecting-up of the solution according to the invention.

The Fig.9 shows connection of electrical contacts in case of one zone connecting-up of the solution according to the invention.

The Fig.l shows the solution according to the invention in fixed, built-in state partly in section, with the sensor houses placed on the surface of the door. In the drawing the door 1 with the cylinderlock insert 2 placed within, with the lock moving blade 3 of the cylinderlock insert 2 and with the fixing screw 4 can be seen. On the surface of the door 1 the outer cover 5 from outside and on the inner surface of the door 1 the inner cover 6 are placed. At the two ends of the cylinderlock insert 2 joining the surface of the door 1 below the outer cover 5 is placed the external sensor house 7 made of insulating material, and below the inner cover 6 is placed the internal sensor house 8 made of insulating material. The body lock sensor 9 in electrical contact with the cylinderlock insert 2 is in the external sensor house 7, which is connected with the electrical contact El through wire Vl. The body lock sensor 10 in electrical contact with the cylinderlock insert 2 is also in the internal sensor house 8 and is connected with the electrical contact E2 through wire V2.

The cover sensor 11 , which is in given case a microswitch is on the external sensor house 7, the push-button 12 of which is in mechanical contact with the inner surface of the outer cover 5 in pushed-in state. The wires V3, V4 are connected to the cover sensor 11, the outgoing clamps of them are electrical contacts E3, E4.

In case of unauthorized entrance when the outer cover 5 is manipulated, the push button 12 of the cover sensor 11 gets to basic state from pushed-in state, and the microswitch breaks the circuit. It results in already an alarm. In case the intruder breaks the cylinderlock insert 2, the circuit established through the cylinderlock insert 2 is broken as well, which results in an alarm as well.

The Fig. 2 shows the solution according to the invention in fixed, built-in state partly in section, with the sensor houses placed in the nests sunk into the door. In the drawing the door 1 with the cylinderlock insert 2 placed within, with the lock moving blade 3 of the cylinderlock insert 2 and with the fixing screw 4 can be seen. The outer cover 5 is placed from outside on the surface of the door 1 and the inner cover 6 is placed on the inner surface of the door 1. In the external nest 13 formed in the outer surface of the door 1 , on the outer part of the cylinderlock insert 2 below the outer cover 5 is placed the external sensor house 7 made of insulating material. In the internal nest 13 formed in the inner surface of the door 1, on the inner part of the cylinderlock insert 2 below the inner cover 6 is placed the internal sensor house 8 made of insulating material. The body lock sensor 9 in electrical contact with the cylinderlock insert 2 is in the external sensor house 7, which is connected with the electrical contact El through wire Vl. The body lock sensor 10 in electrical contact with the cylinderlock insert 2 is also in the internal sensor house 8 and is connected with/on the electrical contact E2 through wire V2.

The cover sensor 11, which in given case is a microswitch is on the external sensor house 7 and the push-button 12 of the switch is in mechanical contact with the inner surface of the outer cover 5 in pushed-in state. The wires V3, V4 are connected to the cover sensor 11, the outgoing clamps of them are electrical contacts E3, E4.

In case of realization of the arrangement according to the Fig. 2 on the outer and inner surface of the door 1 a nest 13 is formed on each surface and the part-units are placed afterwards. This solution is preferable in case of thin covers as well, when there is not enough room below the outer cover 5 or inner cover 6 to place the sensor houses 7, 8.

The Fig. 3 shows the internal sensor house 8 in front view partly with break-out. The Fig. 4 shows the internal sensor house 8 in side-view. It can be seen in the drawings as well, that the shape of the internal sensor house 8 takes the shape of the cross-section of the cylinderlock insert 2 and joins it in a form-closing way. In one side of the internal sensor house 8 is placed the body lock sensor 10 consisting of a threaded sleeve 14 and a grub screw 15. The enlarged part of body lock sensor 10 marked ,,A" in the Fig.3 will be described in detail in the Fig.7.

The Fig.5 shows the external sensor house 7 in front view. The Fig. 6 shows the external sensor house 7 in side-view. The external sensor house 7 can be seen in the drawings, the shape of which is also takes the shape of the cross-section of the cylinderlock insert 2 and joins it in a form-closing way. The body lock sensor 9 is placed in one side of the external sensor house 7, whereas the cover sensor 11 is placed in the other side of the external sensor house 7. The push-button 12 of the cover sensor 11 which in given case can be a microswitch can be seen in the drawing.

The Fig.7 shows the enlarged view of part ,,A" of the Fig.3. It can be seen in the drawing, that the body lock sensor 10 is preferably placed in given case in the threaded bore formed in the internal sensor house 8. The body lock sensor 10 in this case consists of a sleeve 14 of conductive material threaded outside-inside, and of a grub screw 15 with pointed end placed within the sleeve 14. During production the threaded sleeve 14 is placed into the internal sensor house 8 with screwing together with the grub screw 15 provided with threads as well. During installation, after having placed on the cylinderlock insert 2, the grub screw 15 is screwed until it contacts the external surface of the cylinderlock insert 2 and shows suitable electrical contact. During this process the sensor house 8 becomes slightly tight, sideways in a slightly deformed state, which ensures, that the grub screw 15 is always in a flexibly tight state. Resulting from this the electrical contact does not deteriorate even during long and regular use of the door 1.

The Fig.8 shows connection of electrical contacts in case of two zones connecting-up of the solution according to the invention. Electrical contacts El, E2, E3, E4 can be seen in the drawing, which are connected separately to the alarm unit R. The cylinderlock insert 2 and the sensor houses 7, 8 placed on it can be seen in the drawing. The wire Vl from the body lock sensor 9 of the sensor house 7 joins electrical contact El, whereas the wire V2 of the body lock sensor 10 of the sensor house 8 joins electrical contact E2. The

cover sensor 11 and its push-button 12 can be furthermore seen in the drawing. The wires V3, V4 starting from cover sensor 11 join electrical contacts E3, E4. In case of joining according to the Fig.8 electrical contacts El, E2, E3, E4 are separately connected to alarm unit R in two electrical circles. This solution makes it possible, that in case of unauthorized entrance they can trigger the operation of alarm unit R or in given case a larger alarm system separately as well.

The Fig.9 shows connection of electrical contacts in case of one zone connecting-up of the solution according to the invention. Electrical contacts El, E2, E3, E4 can be seen in the drawing. Only electrical contacts El, and E4 join directly to alarm unit R. Electrical contacts E2, E3, respectively wires V2, V3 of the signaling unit connected with them are connected with each other, the cover sensor 11 and the body lock sensors 9,10 are series-connected .

The cylinderlock insert 2 and the sensor houses 7, 8 placed on it can be seen in the drawing. The wire Vl from the body lock sensor 9 of the sensor house 7 joins electrical contact El, whereas the wire V2 of the body lock sensor 10 of the sensor house 8 joins electrical contact E2. The cover sensor 11 and its push-button 12 can be further seen in the drawing. The wires V3, V4 starting from cover sensor 11 join electrical contacts E3, E4 connected electrically with each other. In case of arrangement according to the Fig. 9 electrical contacts El, E2, E3, E4 are series-connected to the alarm unit R in one circuit, so in case of breaking of any part of the circuit, the alarm unit R comes into action, or in given case it triggers the operation of a larger alarm system.

In case of a possible definite realization of the solution according to the invention first the internal sensor house 8 joining the inner surface of the door 1, and the cylinderlock insert 2 in a form-closing way is placed with the body lock sensor 10 placed on one side and with the wire Vl. This can be done directly on the surface of the door 1 in case of proper thickness of the cover, or into the nests 13 formed in the surface of the door 1.

The internal sensor house 8 can be fixed, respectively positioned to the cylinderlock insert 2 with the help of the grub screw 15 placed in the sleeve 14, in such a way, that during the suitable positioning of the internal sensor house 8 the grub screw 15 is screwed in to such extent, that the pointed end of it slightly penetrates to the material of the cylinderlock insert 2. Placing of the external sensor house 7 is followed on the outer surface of the door 1 on the cylinderlock insert 2. In this case the positioning of the external sensor house 7 requires more accuracy, as it has to be placed on the cylinderlock insert 2 in such a way, that the outer cover 5 to be fixed on the outer surface of the door 1 keeps the push-button 12 of the cover sensor 11 pushed-in.

In case of another possible realization of the solution according to the invention no cover sensor 11 is applied, and two identically formed sensor houses 8 are fixed on the outer and inner end of the cylinderlock insert 2 on the outer and inner part of the door 1. In this case alarming takes place only in case of breaking the cylinderlock insert 2, as the connection between the body lock sensors 10 is broken then. The essence of the solution according to the invention is, that a monitoring circuit is continously closed through the

cylinderlock insert 2. The signal and the alarm resulting from this takes place if the circuit is opened, that is the cylinderlock insert 2 is broken.

Alarming is happened even by an attempt of access to the cylinderlock insert 2. In case the unauthorized intruder removes the outer cover 5, then the push-button 12 of the cover sensor 11 comes to its basic position and the circuit of the wires V3, V4 is broken. Alarming is started by this before the time of the intruder's breaking the cylinderlock insert 2 or opening the door 1 and entering the property. It increases considerably the time available for the guarding unit.

The material of the external sensor house 7 and the internal sensor house 8 is insulating material, preferably flexible plastic, in given case polyethylene. The material of the body lock sensors 9, 10 and that of the grub screw 15 is conductive material, metal. The material of the sleeve 14 of the body lock sensors 9, 10 is in given case copper, the material of the grub screw 15 is in given case steel. The wires Vl, V2 are connected preferably to the sleeve 14 of the body lock sensors 9, 10 with soldering or pointwelding. The wires V3, V4 are connected preferably to the outgoing contacts of the microswitch of the cover sensor 11 by soldering. There are preferably grooves formed in the surfaces of the sensor houses 7, 8 for placing wires Vl, V2, V3, V4.

The advantage of the solution according to the invention is, that it contains two independent circuits to protect the cylinderlock insert. This way even the manipulation of the cover of the cylinderlock insert as well as subsequent breaking and removing of the cylinderlock insert by unauthorized intruders give a signal for the security system. It makes possible the instant detection of the attempt of intrusion and the opportunity to take steps against unauthorized intruders as soon as possible, respectively to prevent unauthorized intruders going on intrusion.

An additional advantage is, that it can not be observed from outside, it is not accessible, can not be manipulated. It is simple, easy to install, easy to produce. It can be connected to smaller domestic alarm systems, and through those to larger alarm systems. It can be safely operated, because during monitoring one or two monitoring circuits are continuously closed, so deficiency of contacts can at most result in faulty alarm, but there can be no missed signalling.

It has the advantage as well, that in its installed state, in case of breaking the cylinderlock insert the shape of the fixed sensor house makes difficult the removal of the broken piece of cylinderlock, resulting in further loss of time for the intruder, increasing further the time available for the distant surveillance service.

List of references:

1 - door

2 - cylinderlock insert

3 - lock moving blade

4 - screw

5 - outer cover

6 - inner cover

7 - sensor house (external)

8 - sensor house (internal)

9 - body lock sensor

10 - body lock sensor

11 - cover sensor

12 - push-button 13 - nest

14 - sleeve

15 - grub screw

R - alarm unit

El - electrical contact E2 - electrical contact E3 - electrical contact E4 - electrical contact

V 1 - wire V2 - wire V3 - wire V4 - wire