EP0757339B1 - Einbruchmelder - Google Patents
Einbruchmelder Download PDFInfo
- Publication number
- EP0757339B1 EP0757339B1 EP19950111942 EP95111942A EP0757339B1 EP 0757339 B1 EP0757339 B1 EP 0757339B1 EP 19950111942 EP19950111942 EP 19950111942 EP 95111942 A EP95111942 A EP 95111942A EP 0757339 B1 EP0757339 B1 EP 0757339B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- detector
- contact
- housing
- reed contact
- reed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/02—Mechanical actuation
- G08B13/08—Mechanical actuation by opening, e.g. of door, of window, of drawer, of shutter, of curtain, of blind
Definitions
- the invention relates to an intruder detector, in particular for doors and windows, by means of of a magnetic switch and permanent magnet the closed state of the door or of the window monitored.
- Intrusion detectors of this type are also included in the terms Contact detectors and opening detectors are known.
- intrusion detectors are described, for example, in EP 0 478 834 and DE 30 41 148 and serve to monitor doors and windows for their closing status and issue an unauthorized opening of an alarm message. They usually consist of one Circuit that is housed in a fixed housing and two or more Magnetic switch contains, as well as one or more permanent magnets. The housing will attached to the door frame, for example, and the permanent magnet to the door leaf. Will the Door or window open, the distance between the magnetic switch and increases the magnet, which triggers the magnetic switch and from the detector circuit Alarm is reported.
- the detectors described in the above-mentioned patents not only monitor the closing status of an opening, but also have one Security against sabotage by a suitable arrangement of the switches and magnets Outwitting the detector by means of an external magnet is impossible.
- Other contact detectors are, for example, from Interactive Technologies, Inc., USA, manufactured as part of their SX-V security system. These contact detectors contain one Circuit with two magnetic switches, in particular reed contacts, in one rectangular housing perpendicular to each other and parallel to the side walls of the Detector housing are arranged.
- the associated permanent magnet is according to a Marking on the detector housing parallel to one of two side walls of the Detector housing, i.e. parallel to one of the reed contacts.
- the assembly of the This arrangement of two reed contacts can meet the needs of the detector Customized by the detector housing and the magnet in different Positions on the door or window can be mounted.
- the magnetic field of the Magnet acts on one of the two reed contacts, and the message from the The door or window is then closed by the state of this reed contact given.
- an intruder alarm consisting of a Permanent magnets and a detector circuit, which is arranged in a detector housing, has a reed contact in its detector circuit, which is inclined, preferably in one Angle of 45 °, is arranged with respect to the side walls of the detector housing.
- the Detector housing is on one part of the opening, for example on the wall next to one Window, attached.
- a permanent magnet is on the second part of the opening, for example on Window frame, mounted parallel to one of the side walls of the detector housing. Magnet and Reed contacts are then preferably at an angle of 45 ° to one another.
- the on the reed contact effective magnetic field strength is compared to a parallel arrangement of the contact and Magnet reduced, but is large enough to make the reed contact even in this arrangement trigger magnetically.
- the sensitivity of the reed contact and the strength of the magnet is chosen accordingly. If the door or window is now opened, enlarged the distance between the magnet and reed contact, so that the effective magnetic field downsized and the reed contact opens. When the reed contact is open, the Detector circuit an alarm or fault message.
- the detector circuit is preferred powered by a battery, so that the detector housing is both on the fixed part of the opening can also be attached to the movable part of the opening.
- Fig. 1 shows a plan view of an open detector housing with arranged therein Detector circuit with reed contact and possible positions of a permanent magnet.
- Fig. 2 shows the intrusion detector used on a window to be monitored, the Detector housing and permanent magnet shown in different possible positions are.
- Fig. 1 shows a rectangular detector housing 1, which contains a circuit board 2, followed by a Detector circuit 3 is arranged.
- the detector circuit 3 contains a reed contact 4, the one end of the circuit board 2 is mounted and preferably at an angle of 45 ° to the Side walls of the detector housing 1 is oriented.
- a permanent magnet 5 is in one of three positions shown either parallel or perpendicular to the short side wall of the Detector housing 1 positioned.
- a square detector housing would be an assembly of the Allow magnets parallel to all side walls of the housing.
- orientation at 45 ° is the magnetic field strength of the permanent magnet that acts on the reed contact, compared to the optimal orientation, i.e. a parallel arrangement of magnet and Reed contact, reduced.
- the reduced field strength for a safe triggering of the Contact is not sufficient even with small distances between magnet and reed contact, can reduce the sensitivity of the contact detector by using a more sensitive reed contact increase.
- Another option is to use a stronger magnet.
- Each the lowest and highest sensitivity differs from in series by manufacturer manufactured reed contacts by factors of up to three. Reed contacts higher Sensitivity are at a low cost due to selection based on Sensitivity measurements readily available.
- the distance of the reed contact from the The side wall of the detector housing corresponds to the selected sensitivity of the reed contact and strength of the magnet experimentally easy to determine.
- Fig. 2 shows the example of a window 6 different possible positions of the Detector housing 1 on a wall 7 and the permanent magnet 5 on the movable Window frame 8.
- the assembly of the contact detector can therefore according to the Spatial conditions of its use and the type of opening.
- This type of contact detector can also be used for other openings or containers in the same way Cupboards, chests, showcases, etc. that are to be monitored are used.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
- Burglar Alarm Systems (AREA)
Description
Claims (3)
- Einbruchmelder zur Überwachung und Meldung des Schliessungszustands einer Öffnung, insbesondere einer Tür und eines Fensters, bestehend aus einem an einem ersten Teil der Öffnung befestigten Permanentmagneten (5) und einem an einem zweiten Teil der Öffnung befestigten Meldergehäuse (1), das eine Melderschaltung (3) mit einem Reed-Kontakt (4) aufweist, dadurch gekennzeichnet, dass der Reed-Kontakt (4) schräg zu den Seitenwänden des Meldergehäuses (1) angeordnet ist und zur Auslösung des Reed-Kontaktes (4) der Permanentmagnet (5) parallel zu einer der Seitenwände des Meldergehäuses (1) montiert ist.
- Einbruchmelder gemäss Anspruch 1, dadurch gekennzeichnet, dass der Reed-Kontakt (4) in einem Winkel von 45° zu den Seitenwänden des Meldergehäuses (1) angeordnet ist.
- Einbruchmelder gemäss einem der Ansprüche 1 und 2, dadurch gekennzeichnet, dass die Empfindlichkeit des Einbruchmelders durch den Einsatz eines stärkeren Permanentmagneten (5) und/oder eines empfindlicheren Reed-Kontaktes (4) erhöht ist.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19950111942 EP0757339B1 (de) | 1995-07-29 | 1995-07-29 | Einbruchmelder |
DE59508957T DE59508957D1 (de) | 1995-07-29 | 1995-07-29 | Einbruchmelder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19950111942 EP0757339B1 (de) | 1995-07-29 | 1995-07-29 | Einbruchmelder |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0757339A1 EP0757339A1 (de) | 1997-02-05 |
EP0757339B1 true EP0757339B1 (de) | 2001-01-10 |
Family
ID=8219480
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19950111942 Expired - Lifetime EP0757339B1 (de) | 1995-07-29 | 1995-07-29 | Einbruchmelder |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0757339B1 (de) |
DE (1) | DE59508957D1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017130812A1 (de) | 2017-12-20 | 2019-06-27 | Veka Ag | Schaltkontakteinheit zur Montage an einem Falz zwischen einem Blendrahmen und einem Fenster- oder Türflügel |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3327261A (en) * | 1965-09-22 | 1967-06-20 | Hewlett Packard Co | Direction sensitive displacement transducer |
DE3041148A1 (de) | 1980-10-31 | 1982-09-09 | alfasystem GmbH Vertrieb von elektronischen Sicherheitssystemen, 8034 Germering | Oeffnungsmelder |
GB8606271D0 (en) * | 1986-03-13 | 1986-04-16 | Shorrock Security Systems Ltd | Positional sensor |
DE59009515D1 (de) | 1990-10-04 | 1995-09-14 | Fuss Fritz Gmbh & Co | Vorrichtung zum Melden der Öffnungs- und Schliessstellung von schliessbaren Elementen. |
US5239202A (en) * | 1990-11-30 | 1993-08-24 | Sentrol, Inc. | Failsafe interlock switch |
-
1995
- 1995-07-29 EP EP19950111942 patent/EP0757339B1/de not_active Expired - Lifetime
- 1995-07-29 DE DE59508957T patent/DE59508957D1/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0757339A1 (de) | 1997-02-05 |
DE59508957D1 (de) | 2001-02-15 |
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