EP0011451A1 - Sicherheitsalarmanlagen - Google Patents

Sicherheitsalarmanlagen Download PDF

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Publication number
EP0011451A1
EP0011451A1 EP79302514A EP79302514A EP0011451A1 EP 0011451 A1 EP0011451 A1 EP 0011451A1 EP 79302514 A EP79302514 A EP 79302514A EP 79302514 A EP79302514 A EP 79302514A EP 0011451 A1 EP0011451 A1 EP 0011451A1
Authority
EP
European Patent Office
Prior art keywords
control unit
indicator
responsive
signal
responsive means
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.)
Withdrawn
Application number
EP79302514A
Other languages
English (en)
French (fr)
Inventor
Jack Youens
Rodney Edward Charles White
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0011451A1 publication Critical patent/EP0011451A1/de
Withdrawn legal-status Critical Current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 sensitivity of the whole circuit can be adjusted, but not each sensor individually.
  • the adjustment requires an analyser, which is an expensive piece of equipment, and the sensitivity has to be set to an average. It is desirable to have each sensor with its own individual response to suit-its position.
  • a security alarm system comprising a piezoelectric crystal responsive to stress to produce an electrical signal, amplifying means for such a signal, and means responsive to the amplified signal to give an indication and/or perform a physical action when the crystal is vibrated.
  • the combination of a crystal and amplifying circuit makes it very easy to provide sensitivity adjustment, which can be done by a simple potentiometer, for example, in the amplifying circuit.
  • the crystal and its amplifier are small and easily housed in a compact container which can be inconspicuously installed at almost any point where illegal entry is possible.
  • the amplified signal is applied to a latch circuit which stays latched after the disturbance has ceased.
  • This latch circuit can be used to govern at least one indicating light emitting diode (LED).
  • the main response may be from a remote relay or other means for initiating an alarm or performing another security function.
  • the control panel may also have an indicating light latched on where any of the sensors is disturbed.
  • Part of the system can be used to check existing systems using inertia sensors, or any closed circuit device, as will be described in more detail later.
  • the sensor is housed in an enclosure indicated diagrammatically by the broken line 1. It has a piezoelectric crystal 2, preferably a Sodium Potassium Tartrate crystal under stress. When disturbed, this produces a small voltage which is applied to an integrated amplifier circuit 3, whose sensitivity can be adjusted by a potentiometer 4. The output of this circuit is applied through capacitor 5 to the base of PNP transistor 6, whose collector is coupled to the gate of a silicon controlled rectifier (SCR) 7. This SCR-is in series with a resistor 8 and a light emitting diode (LED) 8,which connects with voltage supply terminal 10. A capacitor 11 couples the junction of SCR 7 and resistor 8 to output terminal 12.
  • the sensor 1 has two further terminals 13 and 14 for the permanent positive and negative supply as indicated.
  • the control panel is housed in an enclosure indicated diagrammatically by the broken line 15. It has four terminals 16, 17, 18 and 19 which are connected by a four core cable to each sensor 1 in the system, the cable running to the first sensor and thence to the next and so on.
  • a permanent 12 volts which may be from a battery, is supplied to the line with terminal 18 and thence to terminal(s) 13, while this voltage is also applied through normally closed reset switch 20 to terminal 16 and thence to terminal(s) 10.
  • Terminals 14 and 19 are on the permanent negative line, while the sensor output from terminal 12 is fed to terminal 17 and thence to the base of normally coniuctive NPN transistor 21. In the collector circuit of this transistor there is an LED 22, which glows when the system is on.
  • the collector of transistor 21 is also coupled to the gate of an SCR 23.
  • the anode of this SCR is connected to the permanent positive via an LED 24 and to the switched positive via a relay 25 which closes contacts (not shown) when energised to operate an alarm or initiate some emergency action.
  • the circuit also includes various capacitors and resistors as shown-which need not be described in detail.
  • the sensor 1 When the disturbance ceases, the sensor 1 continues to show a light through LED 9, since the SCR 7 acts as a latch. Thus the point of disturbance can be identified hours later. LED 24 also remains on. However, it is not always required for the alarm or other device actuated by relay 25 to stay actuated for longer than a few minutes, sav. There may therefore be associated with that alarm or other device means for switching if off after a predetermined time delay.
  • the pressing of the reset switch 20 at the control nanel removes the 12 volts from terminats) 10 and thus restores any conducting SCR 7 to its non-conductive state. It also de-energises relay 25 and SCR 23 reverts to its non-conductive state.
  • control panel If there is any circuit fault, for example if the cable between control panel and sensors is cut, the control panel responds in the same way to give an alarms A check on the sensors will show that none of them has been disturbed, and that therefore the fault will lie elsewhere.
  • Part of the sensor 1 (to the right of the chain- dotted line) can be used for form the basis of a test circuit for an existing system, for example using old-type mechanical sensors.
  • Test units incorporating that right hand part of the sensor 1 can be temporarily installed adjacent all the existing sensors and connected back to a control panel 15, exactly the same as that illustrated.
  • Each old sensor is connected across the SCR gate and negative, at points 26 and 27. No alarm or malfunction means that the SCR is maintained non-conductive, but as soon as points 26 and 27 are open- circuited, the SCR gate goes positive, the SCR conducts and the LED 9 is latched on.
  • test units have jack-plug connectors to make for rapid installation and dis-assembly.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Alarm Systems (AREA)
  • Burglar Alarm Systems (AREA)
EP79302514A 1978-11-10 1979-11-09 Sicherheitsalarmanlagen Withdrawn EP0011451A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7843973 1978-11-10
GB4397378 1978-11-10

Publications (1)

Publication Number Publication Date
EP0011451A1 true EP0011451A1 (de) 1980-05-28

Family

ID=10500939

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79302514A Withdrawn EP0011451A1 (de) 1978-11-10 1979-11-09 Sicherheitsalarmanlagen

Country Status (1)

Country Link
EP (1) EP0011451A1 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0044725A2 (de) * 1980-07-19 1982-01-27 Jack Youens Sicherheitsalarmsysteme
GB2129592A (en) * 1982-07-02 1984-05-16 Paul Coleman Motion sensor
US4622541A (en) * 1984-01-09 1986-11-11 Napco Security Systems, Inc. Intrusion detection system
WO1987003985A1 (en) * 1985-12-17 1987-07-02 Weyrad (Electronics) Limited Improvements relating to alarm systems
GB2189031A (en) * 1986-04-01 1987-10-14 Graham Wild Vibration sensor unit for alarm system
US4758824A (en) * 1985-08-22 1988-07-19 Heinz Jurgen Bernhard Fechner Alarm for a blind
GB2343749A (en) * 1991-03-06 2000-05-17 Bae Sema Ltd Limpet mine detector
WO2014023715A1 (en) 2012-08-08 2014-02-13 Hst S.R.L. Alarm system with objects operating both as sensors and as actuators

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3863250A (en) * 1973-01-30 1975-01-28 Jr Arthur Mccluskey Glass breakage detector
DE2611692A1 (de) * 1976-03-19 1977-09-22 Wekatronik Sicherungssysteme G Glasbruchmelder fuer ruhestrom-alarm- anlagen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3863250A (en) * 1973-01-30 1975-01-28 Jr Arthur Mccluskey Glass breakage detector
DE2611692A1 (de) * 1976-03-19 1977-09-22 Wekatronik Sicherungssysteme G Glasbruchmelder fuer ruhestrom-alarm- anlagen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
FUNKSCHAU, Vol. 49, No. 14, July 1977 Munchen DE G. WETZLER: "Glasscheibenbruchmelder fur Einbruchsicherungsanlagen" pages 618-619 * Page 618, right-hand column, line 22 -page 619, right-hand column, line 24 * *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0044725A2 (de) * 1980-07-19 1982-01-27 Jack Youens Sicherheitsalarmsysteme
EP0044725A3 (en) * 1980-07-19 1982-02-03 Jack Youens Improvements relating to security alarm systems
GB2129592A (en) * 1982-07-02 1984-05-16 Paul Coleman Motion sensor
US4622541A (en) * 1984-01-09 1986-11-11 Napco Security Systems, Inc. Intrusion detection system
US4758824A (en) * 1985-08-22 1988-07-19 Heinz Jurgen Bernhard Fechner Alarm for a blind
WO1987003985A1 (en) * 1985-12-17 1987-07-02 Weyrad (Electronics) Limited Improvements relating to alarm systems
EP0234116A1 (de) * 1985-12-17 1987-09-02 Weyrad (Electronics) Ltd Alarmsystem
GB2189031A (en) * 1986-04-01 1987-10-14 Graham Wild Vibration sensor unit for alarm system
GB2189031B (en) * 1986-04-01 1990-03-21 Graham Wild Vibration sensor unit for alarm system
GB2343749A (en) * 1991-03-06 2000-05-17 Bae Sema Ltd Limpet mine detector
GB2343749B (en) * 1991-03-06 2001-01-17 Bae Sema Ltd Limpet mine detector
WO2014023715A1 (en) 2012-08-08 2014-02-13 Hst S.R.L. Alarm system with objects operating both as sensors and as actuators

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LU NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19810319

RIN1 Information on inventor provided before grant (corrected)

Inventor name: YOUENS, JACK

Inventor name: WHITE, RODNEY EDWARD CHARLES