EP0044725B1 - Systèmes d'alarme de sécurité - Google Patents

Systèmes d'alarme de sécurité Download PDF

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Publication number
EP0044725B1
EP0044725B1 EP19810303291 EP81303291A EP0044725B1 EP 0044725 B1 EP0044725 B1 EP 0044725B1 EP 19810303291 EP19810303291 EP 19810303291 EP 81303291 A EP81303291 A EP 81303291A EP 0044725 B1 EP0044725 B1 EP 0044725B1
Authority
EP
European Patent Office
Prior art keywords
sensor
alarm
control module
alarm means
switch
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
Application number
EP19810303291
Other languages
German (de)
English (en)
Other versions
EP0044725A3 (en
EP0044725A2 (fr
Inventor
Jack Youens
Rodney Edward Charles White
David John Tizard
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.)
Weyrad Electronics Ltd
Original Assignee
Weyrad Electronics Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Weyrad Electronics Ltd filed Critical Weyrad Electronics Ltd
Publication of EP0044725A2 publication Critical patent/EP0044725A2/fr
Publication of EP0044725A3 publication Critical patent/EP0044725A3/en
Application granted granted Critical
Publication of EP0044725B1 publication Critical patent/EP0044725B1/fr
Expired legal-status Critical Current

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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
    • G08B13/12—Mechanical actuation by the breaking or disturbance of stretched cords or wires
    • G08B13/126—Mechanical actuation by the breaking or disturbance of stretched cords or wires for a housing, e.g. a box, a safe, or a room
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/16—Actuation by interference with mechanical vibrations in air or other fluid
    • G08B13/1654—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems

Definitions

  • the indicator that shows when the sensor is correctly set should also be one that marks that sensor out when it is later disturbed in earnest to set off an alarm. To be of any use, such an indicator has to stay on long after the disturbance has ceased.
  • the switch 26 connects terminal 14a to a timing circuit.
  • a timing circuit This consists of a timer 32 energised from the supply voltage and with associated circuitry as shown but which it is not essential to describe. Its function is to energise the coil 33 of a relay periodically to close a switch 34; for example the closure times being seven seconds interspersed with open times of a half to one second.
  • the switch 34 is closed it will be seen that the positive supply voltage is applied to terminal 14a, with a slight drop through protective resistor 35.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
  • Alarm Systems (AREA)

Claims (7)

1. Système d'alarme de sécurité comportant un module de commande (21) et au moins un capteur (1) situé en un emplacement éloigné du module de commande et raccordé par câble à ce dernier, dans lequel le capteur (1) renferme un cristal piézoélectrique (2) qui, au-dessus d'une limite préréglable de vibration, délivre un signal d'alarme qui est transmis au module de commande (21) et est indiqué sur le capteur, une telle indication (15) étant bloquée une fois que les vibrations ont cessé ou se sont atténuées, et dans lequel le module de commande (21) comporte des moyens d'alarme (24; 29) sensibles au signal d'alarme, caractérisé en ce que, pour la mise au point, les moyens de temporisation (32) du système présents dans le module de commande, sont rendus opérants de manière à activer le capteur pendant des périodes successives, au cours desquelles les moyens d'alarme (24; 29) sont rendus inopérants, et en ce que la fin de chacune desdites périodes est adaptée pour supprimer le blocage de l'indication (15) du capteur, si ce dernier a vibré au-dessus de ladite limite pendant la période précédente.
2. Système selon la revendication 1, caractérisé en ce que le capteur renferme un redresseur SCR (13) qui est verrouillé à l'état conducteur par une vibration supérieure à ladite limite.
3. Système selon la revendication 1 ou 2, caractérisé en ce que l'indication prévue sur le capteur est fournie par une diode électroluminescente (15).
4. Système selon la revendication 1, 2 ou 3, caractérisé en ce que l'alimentation électrique du capteur est réalisée par l'intermédiaire de deux paires de conducteurs accouplées de manière à former deux boucles partant du module de commande et revenant à ce dernier, l'une étant prévue pour la tension d'alimentation et la seconde pour le neutre, et dans lequel les moyens d'alarme (24) sont sensibles à une rupture d'une boucle en n'importe quel point, et des seconds moyens d'alarme (37) sont sensibles à la rupture de la seconde boucle en n'importe quel point.
5. Système selon la revendication 4, caractérisé en ce que le capteur comporte un capot amovible et renferme un interrupteur (20) conçu de manière à ouvrir ladite seconde boucle lorsque ledit capot est retiré, ce qui a pour effet d'actionner les seconds moyens d'alarme (37).
6. Système selon la revendication 5 ou 6, comportant une série de capteurs (1) raccordés en parallèle aux bornes desdites boucles.
7. Système selon l'une quelconque des reven- .dications précédentes, caractérisé en ce que les moyens d'alarme (24, 29) sont conçus pour être actionnés lors de l'apparition d'un court-circuit dans la connexion de raccordement par câble.
EP19810303291 1980-07-19 1981-07-17 Systèmes d'alarme de sécurité Expired EP0044725B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8023674 1980-07-19
GB8023674 1980-07-19

Publications (3)

Publication Number Publication Date
EP0044725A2 EP0044725A2 (fr) 1982-01-27
EP0044725A3 EP0044725A3 (en) 1982-02-03
EP0044725B1 true EP0044725B1 (fr) 1986-01-02

Family

ID=10514898

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810303291 Expired EP0044725B1 (fr) 1980-07-19 1981-07-17 Systèmes d'alarme de sécurité

Country Status (2)

Country Link
EP (1) EP0044725B1 (fr)
DE (1) DE3173358D1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA827956B (en) * 1982-11-01 1983-07-27 Harry John Marston Portable security alarm
DE3347483A1 (de) * 1983-12-29 1985-07-11 GAO Gesellschaft für Automation und Organisation mbH, 8000 München Vorrichtung zur sicherung geheimer informationen
GB8531002D0 (en) * 1985-12-17 1986-01-29 Weyrad Electronics Ltd Alarm systems
FR2778690B1 (fr) * 1998-05-15 2000-07-28 Parcomm Ind Chassis de vitre a module d'alarme integre
EP1657689A3 (fr) 2004-11-11 2007-08-29 BLACK & DECKER INC. Détecteur d'intrusion sans fils pour conteneur
EP1939828A3 (fr) * 2004-11-11 2008-11-19 Black & Decker, Inc. Capteur d'intrusion sans fil pour récipient

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4032909A (en) * 1975-07-07 1977-06-28 Eugene E. Karsten Arrangement for testing an alarm system and method
DE2600798C3 (de) * 1976-01-10 1978-06-22 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verfahren und Schaltungsanordnung zur Funktionsprüfung von Geophonen, die in Überwachungsanlagen angeordnet sind, bzw. zur Funktionsprüfung der Überwachungsanlagen
US4138674A (en) * 1977-02-22 1979-02-06 Contronic Controls Limited Four wire multi-satellite intrusion alarm control system with tamper switch
US4191946A (en) * 1977-10-20 1980-03-04 Gonzalez Raymond J Warning apparatus with a line integrity supervisory circuit
EP0011451A1 (fr) * 1978-11-10 1980-05-28 Jack Youens Systèmes d'alarme de sécurité

Also Published As

Publication number Publication date
EP0044725A3 (en) 1982-02-03
DE3173358D1 (en) 1986-02-13
EP0044725A2 (fr) 1982-01-27

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