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GB8911185D0 - Detection system - Google Patents

Detection system

Info

Publication number
GB8911185D0
GB8911185D0 GB898911185A GB8911185A GB8911185D0 GB 8911185 D0 GB8911185 D0 GB 8911185D0 GB 898911185 A GB898911185 A GB 898911185A GB 8911185 A GB8911185 A GB 8911185A GB 8911185 D0 GB8911185 D0 GB 8911185D0
Authority
GB
United Kingdom
Prior art keywords
detection system
detection
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.)
Withdrawn
Application number
GB898911185A
Other versions
GB2230609A (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.)
ONE PLUS ONE INT Ltd
Original Assignee
ONE PLUS ONE INT 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
Priority claimed from GB898906698A external-priority patent/GB8906698D0/en
Application filed by ONE PLUS ONE INT Ltd filed Critical ONE PLUS ONE INT Ltd
Publication of GB8911185D0 publication Critical patent/GB8911185D0/en
Priority to AU53309/90A priority Critical patent/AU5330990A/en
Priority to PCT/GB1990/000423 priority patent/WO1990011586A1/en
Publication of GB2230609A publication Critical patent/GB2230609A/en
Withdrawn legal-status Critical Current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
    • G08B13/1654—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems
    • G08B13/1681—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems using infrasonic detecting means, e.g. a microphone operating below the audible frequency range

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
GB8911185A 1989-03-23 1989-05-16 "Air pressure change intruder detection systems" Withdrawn GB2230609A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU53309/90A AU5330990A (en) 1989-03-23 1990-03-22 Infra-sonic detection system
PCT/GB1990/000423 WO1990011586A1 (en) 1989-03-23 1990-03-22 Infra-sonic detection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB898906698A GB8906698D0 (en) 1989-02-22 1989-03-23 Detection systems

Publications (2)

Publication Number Publication Date
GB8911185D0 true GB8911185D0 (en) 1989-07-05
GB2230609A GB2230609A (en) 1990-10-24

Family

ID=10653889

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8911185A Withdrawn GB2230609A (en) 1989-03-23 1989-05-16 "Air pressure change intruder detection systems"

Country Status (1)

Country Link
GB (1) GB2230609A (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3990063A (en) * 1973-05-14 1976-11-02 Mark Schuman System for monitoring changes in the fluidic impedance or volume of an enclosure
FR2523339A1 (en) * 1982-03-12 1983-09-16 Guglielmetti Vg Electro INFRA-SOUND VOLUMETRIC SENSOR DETECTION DEVICE AND INFRA-SOUND DETECTION METHOD
US4853677A (en) * 1988-07-20 1989-08-01 Yarbrough Alfred E Portable intrusion alarm

Also Published As

Publication number Publication date
GB2230609A (en) 1990-10-24

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)