CA1194573A - Methode et dispositif de depistage du site d'un changement d'etat dans une secion d'un circuit electrique - Google Patents

Methode et dispositif de depistage du site d'un changement d'etat dans une secion d'un circuit electrique

Info

Publication number
CA1194573A
CA1194573A CA000408770A CA408770A CA1194573A CA 1194573 A CA1194573 A CA 1194573A CA 000408770 A CA000408770 A CA 000408770A CA 408770 A CA408770 A CA 408770A CA 1194573 A CA1194573 A CA 1194573A
Authority
CA
Canada
Prior art keywords
circuit
state
devices
bistate
recited
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
CA000408770A
Other languages
English (en)
Inventor
Francis J. Anderson
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.)
Institue for Industrial Research and Standards
Original Assignee
Institue for Industrial Research and Standards
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
Priority claimed from IE22581A external-priority patent/IE810225L/xx
Application filed by Institue for Industrial Research and Standards filed Critical Institue for Industrial Research and Standards
Application granted granted Critical
Publication of CA1194573A publication Critical patent/CA1194573A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/018—Sensor coding by detecting magnitude of an electrical parameter, e.g. resistance
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Alarm Systems (AREA)
CA000408770A 1981-02-06 1982-08-05 Methode et dispositif de depistage du site d'un changement d'etat dans une secion d'un circuit electrique Expired CA1194573A (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
IE22581A IE810225L (en) 1981-02-06 1981-02-06 Identifying position in electrical circuit of change of¹state-intruder alarms
IE225/81 1981-08-06
IE2082 1982-01-07
IE20/82 1982-01-07

Publications (1)

Publication Number Publication Date
CA1194573A true CA1194573A (fr) 1985-10-01

Family

ID=26318779

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000408770A Expired CA1194573A (fr) 1981-02-06 1982-08-05 Methode et dispositif de depistage du site d'un changement d'etat dans une secion d'un circuit electrique

Country Status (3)

Country Link
EP (1) EP0072187A1 (fr)
CA (1) CA1194573A (fr)
DK (1) DK346982A (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7999668B2 (en) 2008-11-17 2011-08-16 GM Global Technology Operations LLC Series interlock system with integrated ability to identify breached locations

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1766735A1 (de) * 1968-07-11 1971-08-19 Werner Karl Heinz Dipl Ing Schaltanordnung fuer insbesondere elektrische Raumschutzanlagen
US3646552A (en) * 1970-11-10 1972-02-29 Gen Motors Corp Tamperproof resistance-sensing supervisory system
SE402660B (sv) * 1970-11-12 1978-07-10 Securitas Int Ab Brandalarmanleggning
JPS5824836B2 (ja) * 1974-10-14 1983-05-24 ノウミボウサイコウギヨウ カブシキガイシヤ カサイナドノツウホウソウチ
DE2632738A1 (de) * 1976-07-21 1978-01-26 Securiton Ag Alarmanlage
DE2716506A1 (de) * 1977-04-14 1978-10-19 Dieter Eberhard Vorrichtung zur bestimmung des alarmausloeseortes in alarmanlagen
US4118700A (en) * 1977-05-31 1978-10-03 Rca Corporation Single wire transmission of multiple switch operations
US4359721A (en) * 1978-10-16 1982-11-16 American District Telegraph Company Two-wire multi-zone alarm system
DE2939462C2 (de) * 1979-09-28 1983-01-05 Siemens AG, 1000 Berlin und 8000 München Verfahren und Einrichtung zur Identifizierung einzelner Melder in Einbruch- oder Brandmeldeanlagen
DE2939494B2 (de) * 1979-09-28 1981-07-02 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung für Einbruch- oder Feuermeldea nlagen
GB2082358B (en) * 1980-08-14 1984-09-05 Dynalarm Ltd Security systems

Also Published As

Publication number Publication date
EP0072187A1 (fr) 1983-02-16
DK346982A (da) 1983-02-07

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Legal Events

Date Code Title Description
MKEX Expiry