EP0757339B1 - Intrusion alarm - Google Patents

Intrusion alarm Download PDF

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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
Application number
EP19950111942
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German (de)
French (fr)
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EP0757339A1 (en
Inventor
Walter Vollenweider
Lukas Müller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Building Technologies AG
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Siemens Building Technologies AG
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Publication date
Application filed by Siemens Building Technologies AG filed Critical Siemens Building Technologies AG
Priority to DE59508957T priority Critical patent/DE59508957D1/en
Priority to EP19950111942 priority patent/EP0757339B1/en
Publication of EP0757339A1 publication Critical patent/EP0757339A1/en
Application granted granted Critical
Publication of EP0757339B1 publication Critical patent/EP0757339B1/en
Anticipated expiration legal-status Critical
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    • 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.

Description

Die Erfindung betrifft einen Einbruchmelder, insbesondere für Türen und Fenster, der mittels eines magnetischen Schalters und Permanentmagneten den Schliessungszustand der Tür oder des Fensters überwacht. Einbruchmelder dieser Art sind auch unter den Begriffen Kontaktmelder und Öffnungsmelder bekannt.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.

Solche Einbruchmelder sind zum Beispiel in der EP 0 478 834 und DE 30 41 148 beschrieben und dienen dazu, Türen oder Fenster auf ihren Schliessungszustand zu überwachen und bei deren unbefugter Öffnung eine Alarmmeldung abzugeben. Sie bestehen zumeist aus einer Schaltung, die in einem ortsfesten Gehäuse untergebracht ist und zwei oder mehr Magnetschalter enthält, sowie einem oder mehreren Permanentmagneten. Das Gehäuse wird dabei zum Beispiel am Türrahmen und der Permanentmagnet am Türblatt befestigt. Wird die Tür oder das Fenster geöffnet, vergrössert sich der Abstand zwischen dem Magnetschalter und dem Magneten, wodurch der Magnetschalter ausgelöst wird und von der Melderschaltung ein Alarm gemeldet wird. Die in den obengenannten Patentschriften beschriebenen Melder überwachen nicht nur den Schliessungszustand einer Öffnung, sondern verfügen auch über eine Sabotagesicherheit, indem durch entsprechende Anordnung der Schalter und Magneten eine Überlistung des Melders mittels eines Fremdmagneten verunmöglicht wird.Such 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.

Weitere Kontaktmelder werden zum Beispiel von der Firma Interactive Technologies, Inc., USA, als Teil ihres SX-V Security System hergestellt. Diese Kontaktmelder enthalten eine Schaltung mit jeweils zwei Magnetschaltern, insbesondere Reed-Kontakten, die in einem rechteckigen Gehäuse senkrecht zueinander und parallel zu den Seitenwänden des Meldergehäuses angeordnet sind. Der dazugehörige Permanentmagnet wird gemäss einer Markierung auf dem Meldergehäuse parallel zu einer von zwei Seitenwänden des Meldergehäuses, also parallel zu einem der Reed-Kontakte, montiert. Die Montage des Melders kann durch diese Anordnung von zwei Reed-Kontakten den Bedürfnissen des Anwenders angepasst werden, indem das Meldergehäuse und der Magnet in verschiedenen Positionen an der Tür oder am Fenster montiert werden kann. Das magnetische Feld des Magneten wirkt auf den einen der beiden Reed-Kontakte, und die Meldung des Schliessungszustands der Tür oder des Fensters wird sodann durch den Zustand dieses Reed-Kontaktes gegeben.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.

Der Nachteil dieser letztgenannten Kontaktmelder liegt darin, dass für die erleichterte Montage des Melders zwei Reed-Kontakte notwendig sind und hierdurch höhere Herstellungskosten des Kontaktmelders verursacht werden, wobei für die Meldung des Schliessungszustands nur einer der beiden Reed-Kontakte beansprucht wird.The disadvantage of these last-mentioned contact detectors is that they are easier to install of the detector two reed contacts are necessary and thus higher manufacturing costs of the Contact detector are caused, but only one for reporting the closing status of the two reed contacts is claimed.

Es ist die Aufgabe der Erfindung, einen Kontaktmelder zu schaffen, dessen Montage erleichtert ist, indem der Permanentmagnet bezüglich des Meldergehäuses parallel zu einer gewünschten Seitenwand des Meldergehäuses orientiert sein darf und der kostengünstiger ist, indem die Melderschaltung nur einen Reed-Kontakt enthält.It is the object of the invention to provide a contact detector whose assembly is easier is by the permanent magnet with respect to the detector housing parallel to a desired Side wall of the detector housing may be oriented and which is cheaper by the Detector circuit contains only one reed contact.

Die Aufgabe wird dadurch gelöst, dass ein Einbruchmelder, bestehend aus einem Permanentmagneten und einer Melderschaltung, die in einem Meldergehäuse angeordnet ist, einen Reed-Kontakt in seiner Melderschaltung aufweist, der schräg, vorzugsweise in einem Winkel von 45°, bezüglich der Seitenwände des Meldergehäuses angeordnet ist. Das Meldergehäuse wird an dem einen Teil der Öffnung, zum Beispiel an der Wand neben einem Fenster, befestigt. Ein Permanentmagnet wird am zweiten Teil der Öffnung, zum Beispiel am Fensterrahmen, parallel zu einer der Seitenwände des Meldergehäuses montiert. Magnet und Reed-Kontakt stehen sodann vorzugsweise im Winkel von 45° zueinander. Die auf den Reed-Kontakt wirksame Magnetfeldstärke ist im Vergleich zu einer parallelen Anordnung des Kontaktes und Magneten vermindert, ist jedoch gross genug, um den Reed-Kontakt auch in dieser Anordnung magnetisch auszulösen. Die Empfindlichkeit des Reed-Kontaktes und die Stärke des Magneten wird hierzu entsprechend gewählt. Wird nun die Tür oder das Fenster geöffnet, vergrössert sich der Abstand zwischen Magnet und Reed-Kontakt, sodass sich das wirksame Magnetfeld verkleinert und der Reed-Kontakt sich öffnet. Bei offenem Reed-Kontakt gibt sodann die Melderschaltung eine Alarm- oder Störungsmeldung. Vorzugsweise wird die Melderschaltung von einer Batterie betrieben, sodass das Meldergehäuse sowohl am ortsfesten Teil der Öffnung als auch am beweglichen Teil der Öffnung befestigt werden kann.The task is solved in that 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.

Ausführungsbeispiele sind im folgenden und anhand der Fig. 1 und 2 näher beschrieben.Exemplary embodiments are described below and with reference to FIGS. 1 and 2.

Fig. 1 zeigt eine Draufsicht eines offenen Meldergehäuses mit darin angeordneter Melderschaltung mit Reed-Kontakt sowie mögliche Positionen eines Permanentmagneten.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 zeigt den Einbruchmelder an einem zu überwachenden Fenster eingesetzt, wobei das Meldergehäuse und der Permanentmagnet in verschiedenen möglichen Positionen dargestellt sind.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 zeigt ein rechteckiges Meldergehäuse 1, das eine Leiterplatte 2 enthält, worauf eine Melderschaltung 3 angeordnet ist. Die Melderschaltung 3 enthält einen Reed-Kontakt 4, der an einem Ende der Leiterplatte 2 montiert ist und vorzugsweise in einem Winkel von 45° zu den Seitenwänden des Meldergehäuses 1 orientiert ist. Ein Permanentmagnet 5 ist in einer von drei dargestellten Positionen entweder parallel oder senkrecht zur kurzen Seitenwand des Meldergehäuses 1 positioniert. Ein quadratisches Meldergehäuse würde eine Montage des Magneten parallel zu allen Seitenwänden des Gehäuses erlauben. Durch die Orientierung bei 45° ist die magnetische Feldstärke des Permanentmagneten, die auf den Reed-Kontakt wirkt, im Vergleich zur optimalen Orientierung, also einer parallelen Anordnung von Magnet und Reed-Kontakt, vermindert. Sollte die verminderte Feldstärke für eine sichere Auslösung des Kontaktes auch bei kleinen Distanzen zwischen Magnet und Reed-Kontakt nicht ausreichen, kann die Empfindlichkeit des Kontaktmelders durch den Einsatz eines empfindlicheren Reed-Kontakts erhöht werden. Eine weitere Möglichkeit ist der Einsatz eines stärkeren Magneten. Je nach Hersteller unterscheidet sich die niedrigste und höchste Empfindlichkeit von in Serie hergestellten Reed-Kontakten um Faktoren von bis zu drei. Reed-Kontakte höherer Empfindlichkeit sind bei geringen Mehrkosten durch Auswahl aufgrund von Empfindlichkeitsmessungen leicht erhältlich. Die Distanz des Reed-Kontaktes von der Seitenwand des Meldergehäuses ist entsprechend der ausgewählten Empfindlichkeit des Reed-Kontaktes und Stärke des Magneten experimentell leicht zu bestimmen.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. By 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. If 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 zeigt am Beispiel eines Fensters 6 verschiedene mögliche Positionierungen des Meldergehäuses 1 an einer Wand 7 und des Permanentmagneten 5 am beweglichen Fensterrahmen 8. Die Montage des Kontaktmelders kann also entsprechend den Raumverhältnissen seines Einsatzes und der Art der Öffnung vollzogen werden.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.

Diese Art Kontaktmelder kann in gleicher Weise auch für weitere Öffnungen oder Behälter wie Schränke, Truhen, Vitrinen usw., die zu überwachen sind, eingesetzt werden.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.

Claims (3)

  1. Intrusion detector for monitoring and reporting the closing condition of an opening, in particular a door and a window, consisting of a permanent magnet (5) mounted at a first part of the opening and of a detector housing (1 ) mounted at a second part of the opening, the detector housing comprising a detector circuit (3) with a reed contact (4), characterized in that the reed contact (4) is arranged inclined to the side walls of the detector housing (1 ) and in that for the release of the reed contact (4) the permanent magnet (5) is mounted parallel to one of the side walls of the detector housing (1).
  2. Intrusion detector according to claim 2, characterized in that the reed contact (4) is arranged at an angle of 45° to the side walls of the detector housing (1).
  3. Intrusion detector according to one of claims 1 and 2, characterized in that the sensitivity of the intrusion detector is increased by the use of a more powerful permanent magnet (5) and/or a more sensitive reed contact (4).
EP19950111942 1995-07-29 1995-07-29 Intrusion alarm Expired - Lifetime EP0757339B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE59508957T DE59508957D1 (en) 1995-07-29 1995-07-29 Burglar alarm
EP19950111942 EP0757339B1 (en) 1995-07-29 1995-07-29 Intrusion alarm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19950111942 EP0757339B1 (en) 1995-07-29 1995-07-29 Intrusion alarm

Publications (2)

Publication Number Publication Date
EP0757339A1 EP0757339A1 (en) 1997-02-05
EP0757339B1 true EP0757339B1 (en) 2001-01-10

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ID=8219480

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19950111942 Expired - Lifetime EP0757339B1 (en) 1995-07-29 1995-07-29 Intrusion alarm

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EP (1) EP0757339B1 (en)
DE (1) DE59508957D1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017130812A1 (en) 2017-12-20 2019-06-27 Veka Ag Switching contact unit for mounting on a fold between a window frame and a window or door leaf

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3327261A (en) * 1965-09-22 1967-06-20 Hewlett Packard Co Direction sensitive displacement transducer
DE3041148A1 (en) 1980-10-31 1982-09-09 alfasystem GmbH Vertrieb von elektronischen Sicherheitssystemen, 8034 Germering Burglar alarm switch for door or window - has screened reed contacts operated if external magnet is used to influence alarm contacts
GB8606271D0 (en) * 1986-03-13 1986-04-16 Shorrock Security Systems Ltd Positional sensor
EP0478834B1 (en) 1990-10-04 1995-08-09 Fritz Fuss GmbH & Co. Device for signalling the open or closed position of shutable elements
US5239202A (en) * 1990-11-30 1993-08-24 Sentrol, Inc. Failsafe interlock switch

Also Published As

Publication number Publication date
EP0757339A1 (en) 1997-02-05
DE59508957D1 (en) 2001-02-15

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