EP0026461A3 - Circuit arrangement for intrusion or fire alarm systems - Google Patents

Circuit arrangement for intrusion or fire alarm systems Download PDF

Info

Publication number
EP0026461A3
EP0026461A3 EP80105763A EP80105763A EP0026461A3 EP 0026461 A3 EP0026461 A3 EP 0026461A3 EP 80105763 A EP80105763 A EP 80105763A EP 80105763 A EP80105763 A EP 80105763A EP 0026461 A3 EP0026461 A3 EP 0026461A3
Authority
EP
European Patent Office
Prior art keywords
alarm
contact
line
sabotage
resistor
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.)
Granted
Application number
EP80105763A
Other languages
German (de)
Other versions
EP0026461B1 (en
EP0026461A2 (en
Inventor
Karlheinz Ing. Grad. Schreyer
Luc Den Dooven
Dietrich Dipl.-Ing Bornewasser
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 AG
Original Assignee
Siemens AG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6082205&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0026461(A3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT80105763T priority Critical patent/ATE5108T1/en
Publication of EP0026461A2 publication Critical patent/EP0026461A2/en
Publication of EP0026461A3 publication Critical patent/EP0026461A3/en
Application granted granted Critical
Publication of EP0026461B1 publication Critical patent/EP0026461B1/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/02—Monitoring continuously signalling or alarm systems
    • G08B29/06—Monitoring of the line circuits, e.g. signalling of line faults
    • G08B29/08—Signalling of tampering with the line circuit
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Alarm Systems (AREA)
  • Fire Alarms (AREA)
  • Fire-Detection Mechanisms (AREA)

Abstract

1. A circuit arrangement for burglar and fire alarm systems for monitoring individual alarm lines (L1, L2, ...) in respect of alarm sabotage and disturbance in accordance with the rest current principle, having a current measuring device (MI) which is arranged in a central unit (Z) in the alarm line (L1) in order to determine the line resistance and whose output is connected to a plurality of comparators (K1, K2, K3), and having alarm units (M1, M2, ...) which respectively possess an alarm contact (Ka) and a sabotage contact (KS) which are connected to one and the same line (L1), characterised in that a plurality of alarm units (M1, M2, ...) are connected to one line (L1), that in the individual alarm units (M1, M2, ...), there is arranged a first resistor (RS) in series with the sabotage contact (KS) in line (L1) and the series connection of a second resistor (RA) and the alarm contact (KA) is arranged parallel to the first resistor (RS), where the resistance values are so dimensioned that the response of an alarm contact (KA) or the simultaneous response of the alarm contacts of a plurality of alarm units effects a line resistance change which is distinguishable from the response of a sabotage contact (KS) and which indicates a separate alarm and sabotage call (A, S) which are independent of one another.
EP80105763A 1979-09-28 1980-09-24 Circuit arrangement for intrusion or fire alarm systems Expired EP0026461B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80105763T ATE5108T1 (en) 1979-09-28 1980-09-24 CIRCUIT ARRANGEMENT FOR BURGLAR OR FIRE ALARM SYSTEMS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2939494 1979-09-28
DE2939494A DE2939494B2 (en) 1979-09-28 1979-09-28 Circuit arrangement for intrusion or fire alarm systems

Publications (3)

Publication Number Publication Date
EP0026461A2 EP0026461A2 (en) 1981-04-08
EP0026461A3 true EP0026461A3 (en) 1981-05-13
EP0026461B1 EP0026461B1 (en) 1983-10-19

Family

ID=6082205

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80105763A Expired EP0026461B1 (en) 1979-09-28 1980-09-24 Circuit arrangement for intrusion or fire alarm systems

Country Status (3)

Country Link
EP (1) EP0026461B1 (en)
AT (1) ATE5108T1 (en)
DE (1) DE2939494B2 (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0072187A1 (en) * 1981-02-06 1983-02-16 Institute For Industrial Research And Standards Method and apparatus for identifying the location of a change in state of a part of an electrical circuit
DE3148277C2 (en) * 1981-12-05 1985-05-30 Friedrich Merk-Telefonbau GmbH, 8000 München Circuit arrangement for balancing a detection line
DE3148278C2 (en) * 1981-12-05 1984-09-20 Friedrich Merk-Telefonbau GmbH, 8000 München Circuit arrangement for evaluating the line voltage in alarm lines with several thresholds
DE3211550C2 (en) * 1982-03-29 1985-02-14 Siemens AG, 1000 Berlin und 8000 München DC alarm system
DE3268015D1 (en) * 1982-07-10 1986-01-30 Fuss Fritz Kg Circuit arrangement for signalling alarms
DE3308455A1 (en) * 1983-03-10 1984-09-13 Hans-Joachim 5810 Witten Becker Alarm system for protecting a building
GB2155223B (en) * 1984-02-29 1987-07-08 Bl Tech Ltd A circuit
FR2594575B1 (en) * 1986-02-19 1988-07-01 Applic Electro Tech Avance SELF-GUARDING DEVICE FOR MONITORING LINES
US4817131A (en) * 1986-06-20 1989-03-28 Badger Meter, Inc. Automatic meter reading system
DE3624663A1 (en) * 1986-07-22 1988-01-28 Bosch Gmbh Robert Circuit arrangement for switching various electrical loads on and off
FR2652184B1 (en) * 1989-09-18 1994-05-13 Texton PROTECTION SYSTEM, PARTICULARLY FOR MOTOR VEHICLES, OF THE TYPE INCLUDING AN ELECTRONIC DEVICE FOR CONTROLLING AN ALARM DEVICE.
FR2664408A1 (en) * 1990-07-04 1992-01-10 Spie Trindel Monitoring and alarm installation
DE60210738T2 (en) 2002-01-16 2007-04-12 Leeds Electronic Eng. Ltd. Anti-theft alarm with reduced wiring
US7999668B2 (en) 2008-11-17 2011-08-16 GM Global Technology Operations LLC Series interlock system with integrated ability to identify breached locations

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1503894A (en) * 1966-10-18 1967-12-01 Alarme Et Telesurveillance A T Improvements to electrical alarm and surveillance installations
US4198625A (en) * 1978-05-02 1980-04-15 General Signal Corporation Dual alarm detection on single loop

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH468682A (en) * 1967-06-26 1969-02-15 Cerberus Ag Fire alarm system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1503894A (en) * 1966-10-18 1967-12-01 Alarme Et Telesurveillance A T Improvements to electrical alarm and surveillance installations
US4198625A (en) * 1978-05-02 1980-04-15 General Signal Corporation Dual alarm detection on single loop

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ELEKTOR, Band 2, Nr. 1, Januar 1976, Elektor Publishers Ltd, Canterbury, GB, "High security burglar alarm sensor", Seite 149 *

Also Published As

Publication number Publication date
EP0026461B1 (en) 1983-10-19
ATE5108T1 (en) 1983-11-15
DE2939494B2 (en) 1981-07-02
EP0026461A2 (en) 1981-04-08
DE2939494A1 (en) 1981-04-02

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