DK346982A - METHOD AND APPARATUS FOR IDENTIFYING THE LOCATION OF A STATE CHANGE IN A PART OF AN ELECTRIC CIRCUIT - Google Patents

METHOD AND APPARATUS FOR IDENTIFYING THE LOCATION OF A STATE CHANGE IN A PART OF AN ELECTRIC CIRCUIT Download PDF

Info

Publication number
DK346982A
DK346982A DK346982A DK346982A DK346982A DK 346982 A DK346982 A DK 346982A DK 346982 A DK346982 A DK 346982A DK 346982 A DK346982 A DK 346982A DK 346982 A DK346982 A DK 346982A
Authority
DK
Denmark
Prior art keywords
identifying
location
electric circuit
state change
change
Prior art date
Application number
DK346982A
Other languages
Danish (da)
Inventor
F J Anderson
Original Assignee
Inst For Ind Res & 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/en
Application filed by Inst For Ind Res & Standards filed Critical Inst For Ind Res & Standards
Publication of DK346982A publication Critical patent/DK346982A/en

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)
DK346982A 1981-02-06 1982-08-03 METHOD AND APPARATUS FOR IDENTIFYING THE LOCATION OF A STATE CHANGE IN A PART OF AN ELECTRIC CIRCUIT DK346982A (en)

Applications Claiming Priority (2)

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
IE2082 1982-01-07

Publications (1)

Publication Number Publication Date
DK346982A true DK346982A (en) 1983-02-07

Family

ID=26318779

Family Applications (1)

Application Number Title Priority Date Filing Date
DK346982A DK346982A (en) 1981-02-06 1982-08-03 METHOD AND APPARATUS FOR IDENTIFYING THE LOCATION OF A STATE CHANGE IN A PART OF AN ELECTRIC CIRCUIT

Country Status (3)

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

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 (en) * 1968-07-11 1971-08-19 Werner Karl Heinz Dipl Ing Switching arrangement for in particular electrical room protection systems
US3646552A (en) * 1970-11-10 1972-02-29 Gen Motors Corp Tamperproof resistance-sensing supervisory system
SE402660B (en) * 1970-11-12 1978-07-10 Securitas Int Ab FIREPLACE FACILITY
JPS5824836B2 (en) * 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 Kasainadonotsuhousouchi
DE2632738A1 (en) * 1976-07-21 1978-01-26 Securiton Ag Alarm circuit with central station and sensor contacts - has oscillator output coupled to voltage comparators detecting both break and short circuit conditions
DE2716506A1 (en) * 1977-04-14 1978-10-19 Dieter Eberhard Location of triggered sensor in alarm system - by measuring peak voltage at end of line of series connected sensor contacts having parallel connected resistors
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 (en) * 1979-09-28 1983-01-05 Siemens AG, 1000 Berlin und 8000 München Process and device for the identification of individual detectors in intrusion or fire alarm systems
DE2939494B2 (en) * 1979-09-28 1981-07-02 Siemens AG, 1000 Berlin und 8000 München Circuit arrangement for intrusion or fire alarm systems
GB2082358B (en) * 1980-08-14 1984-09-05 Dynalarm Ltd Security systems

Also Published As

Publication number Publication date
CA1194573A (en) 1985-10-01
EP0072187A1 (en) 1983-02-16

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Legal Events

Date Code Title Description
AHB Application shelved due to non-payment