GB2019072B - Alarm systems - Google Patents

Alarm systems

Info

Publication number
GB2019072B
GB2019072B GB7913061A GB7913061A GB2019072B GB 2019072 B GB2019072 B GB 2019072B GB 7913061 A GB7913061 A GB 7913061A GB 7913061 A GB7913061 A GB 7913061A GB 2019072 B GB2019072 B GB 2019072B
Authority
GB
United Kingdom
Prior art keywords
alarm systems
alarm
systems
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
GB7913061A
Other versions
GB2019072A (en
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.)
Contronic Controls Ltd
Original Assignee
Contronic Controls 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 Contronic Controls Ltd filed Critical Contronic Controls Ltd
Publication of GB2019072A publication Critical patent/GB2019072A/en
Application granted granted Critical
Publication of GB2019072B publication Critical patent/GB2019072B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/16—Actuation by interference with mechanical vibrations in air or other fluid
    • G08B13/1609—Actuation by interference with mechanical vibrations in air or other fluid using active vibration detection systems
    • G08B13/1618—Actuation by interference with mechanical vibrations in air or other fluid using active vibration detection systems using ultrasonic detection means
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2491—Intrusion detection systems, i.e. where the body of an intruder causes the interference with the electromagnetic field
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Burglar Alarm Systems (AREA)
GB7913061A 1978-04-17 1979-04-12 Alarm systems Expired GB2019072B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA301,269A CA1106464A (en) 1978-04-17 1978-04-17 Four wire multi-satellite intrusion alarm with multiplex annunciation

Publications (2)

Publication Number Publication Date
GB2019072A GB2019072A (en) 1979-10-24
GB2019072B true GB2019072B (en) 1982-04-28

Family

ID=4111259

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7913061A Expired GB2019072B (en) 1978-04-17 1979-04-12 Alarm systems

Country Status (4)

Country Link
AU (1) AU4605979A (en)
CA (1) CA1106464A (en)
DE (1) DE2914910A1 (en)
GB (1) GB2019072B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2173618B (en) * 1985-04-12 1988-09-14 Emi Ltd Alarm monitoring installation
ES2262756T3 (en) 2002-01-16 2006-12-01 Leeds Electronic Eng. Ltd. ANTI-THEFT ALARM SYSTEM WITH REDUCED WIRING.

Also Published As

Publication number Publication date
GB2019072A (en) 1979-10-24
AU4605979A (en) 1979-10-25
DE2914910A1 (en) 1979-10-25
CA1106464A (en) 1981-08-04

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Legal Events

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