ZA81120B - Monitoring apparatus - Google Patents

Monitoring apparatus

Info

Publication number
ZA81120B
ZA81120B ZA00810120A ZA81120A ZA81120B ZA 81120 B ZA81120 B ZA 81120B ZA 00810120 A ZA00810120 A ZA 00810120A ZA 81120 A ZA81120 A ZA 81120A ZA 81120 B ZA81120 B ZA 81120B
Authority
ZA
South Africa
Prior art keywords
monitoring apparatus
monitoring
Prior art date
Application number
ZA00810120A
Inventor
R Peck
Original Assignee
Raveningham Elect Res
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 Raveningham Elect Res filed Critical Raveningham Elect Res
Publication of ZA81120B publication Critical patent/ZA81120B/en

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
    • 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
    • G08B25/06—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 using power transmission lines
    • 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
    • G08B29/04—Monitoring of the detection circuits

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Selective Calling Equipment (AREA)
  • Alarm Systems (AREA)
ZA00810120A 1980-01-08 1981-01-08 Monitoring apparatus ZA81120B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8000544A GB2067321B (en) 1980-01-08 1980-01-08 Monitoring apparatus

Publications (1)

Publication Number Publication Date
ZA81120B true ZA81120B (en) 1982-01-27

Family

ID=10510505

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00810120A ZA81120B (en) 1980-01-08 1981-01-08 Monitoring apparatus

Country Status (3)

Country Link
EP (1) EP0032135A3 (en)
GB (1) GB2067321B (en)
ZA (1) ZA81120B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2119981B (en) * 1982-01-07 1985-08-07 Morrison John M Alarm systems
IT1159756B (en) * 1982-03-18 1987-03-04 Zanussi Zeltron Inst CONVEYED WAVE CONTROL AND SAFETY SYSTEM
FR2578372B1 (en) * 1985-03-01 1987-05-15 Fichet Bauche METHOD FOR TRANSMITTING SIGNALS, IN PARTICULAR FOR MONITORING A SET OF ZONES TO BE PROTECTED, BETWEEN A CENTRAL STATION AND A PLURALITY OF DETECTION CIRCUITS CONNECTED THEREWITH BY A TRANSMISSION MEDIUM AND SYSTEM FOR IMPLEMENTING SAME SUCH A PROCESS
GB8512655D0 (en) * 1985-05-20 1985-06-26 London Technology Network Security systems
GB8526294D0 (en) * 1985-10-24 1985-11-27 Pcg Designs Ltd Alarm & signalling systems

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1390913A (en) * 1971-05-24 1975-04-16 Microwave & Electronic Syst Monitoring systems
US3925763A (en) * 1973-09-13 1975-12-09 Romesh Tekchand Wadhwani Security system
DE2749169A1 (en) * 1977-11-03 1979-05-10 Elektronik Geraete Gmbh Automatic burglar alarm system - has central control and detector stages coupled over lighting mains circuit

Also Published As

Publication number Publication date
EP0032135A3 (en) 1982-02-10
GB2067321B (en) 1983-07-06
GB2067321A (en) 1981-07-22
EP0032135A2 (en) 1981-07-15

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