GB1448028A - Alarm systems - Google Patents

Alarm systems

Info

Publication number
GB1448028A
GB1448028A GB5360873A GB5360873A GB1448028A GB 1448028 A GB1448028 A GB 1448028A GB 5360873 A GB5360873 A GB 5360873A GB 5360873 A GB5360873 A GB 5360873A GB 1448028 A GB1448028 A GB 1448028A
Authority
GB
United Kingdom
Prior art keywords
alarm
station
line
remote
nov
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
GB5360873A
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.)
Wormald International Ltd
Original Assignee
Wormald International Ltd
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 Wormald International Ltd filed Critical Wormald International Ltd
Publication of GB1448028A publication Critical patent/GB1448028A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B26/00—Alarm systems in which substations are interrogated in succession by a central station
    • G08B26/006—Alarm systems in which substations are interrogated in succession by a central station with substations connected to an individual line, e.g. star configuration

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

1448028 Alarm systems WORMALD INTERNATIONAL Ltd 19 Nov 1973 [20 Nov 1972] 53608/73 Heading G4H An alarm system comprises a plurality of remote stations to be monitored, a supervisory station, a line for each remote station joining the remote stations and the supervisory station, alarm contacts at each remote station, constant current sources connected into the line associated with particular alarm contacts by those alarm contacts, and means for examining each line to determine the current in it. The disclosure is essentially as in Specification 1,448,029, which is referred to.
GB5360873A 1972-12-20 1973-11-19 Alarm systems Expired GB1448028A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AUPB128872 1972-12-20

Publications (1)

Publication Number Publication Date
GB1448028A true GB1448028A (en) 1976-09-02

Family

ID=3765499

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5360873A Expired GB1448028A (en) 1972-12-20 1973-11-19 Alarm systems

Country Status (2)

Country Link
AU (1) AU476955B2 (en)
GB (1) GB1448028A (en)

Also Published As

Publication number Publication date
AU6257273A (en) 1975-05-15
AU476955B2 (en) 1975-05-15

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee