GB8819550D0 - Instrusion detection system - Google Patents

Instrusion detection system

Info

Publication number
GB8819550D0
GB8819550D0 GB888819550A GB8819550A GB8819550D0 GB 8819550 D0 GB8819550 D0 GB 8819550D0 GB 888819550 A GB888819550 A GB 888819550A GB 8819550 A GB8819550 A GB 8819550A GB 8819550 D0 GB8819550 D0 GB 8819550D0
Authority
GB
United Kingdom
Prior art keywords
detection system
instrusion
instrusion detection
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.)
Granted
Application number
GB888819550A
Other versions
GB2221990B (en
GB2221990A (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.)
Shorrock Ltd
Original Assignee
Shorrock 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 Shorrock Ltd filed Critical Shorrock Ltd
Priority to GB8819550A priority Critical patent/GB2221990B/en
Publication of GB8819550D0 publication Critical patent/GB8819550D0/en
Publication of GB2221990A publication Critical patent/GB2221990A/en
Application granted granted Critical
Publication of GB2221990B publication Critical patent/GB2221990B/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G08B13/02—Mechanical actuation
    • G08B13/12—Mechanical actuation by the breaking or disturbance of stretched cords or wires
    • G08B13/122—Mechanical actuation by the breaking or disturbance of stretched cords or wires for a perimeter fence
GB8819550A 1988-08-17 1988-08-17 Intrusion detection system Expired - Lifetime GB2221990B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8819550A GB2221990B (en) 1988-08-17 1988-08-17 Intrusion detection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8819550A GB2221990B (en) 1988-08-17 1988-08-17 Intrusion detection system

Publications (3)

Publication Number Publication Date
GB8819550D0 true GB8819550D0 (en) 1989-03-30
GB2221990A GB2221990A (en) 1990-02-21
GB2221990B GB2221990B (en) 1992-04-08

Family

ID=10642274

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8819550A Expired - Lifetime GB2221990B (en) 1988-08-17 1988-08-17 Intrusion detection system

Country Status (1)

Country Link
GB (1) GB2221990B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8828877D0 (en) * 1988-12-09 1989-01-18 Atomic Energy Authority Uk Alarm system
GB9005751D0 (en) * 1990-03-14 1990-05-09 Geoquip Ltd Intrusion detection system and signal processing circuitry therefor
GB9106828D0 (en) * 1991-04-02 1991-05-22 System Silicon Plc Ball game monitor
GB2295230A (en) * 1994-10-05 1996-05-22 Cqr Security Components Ltd Shock sensor apparatus and method
FR2863395B1 (en) * 2003-12-04 2006-04-21 Internat Pool Safety And Light BARRIER HAVING A CROSS CONSTRAINT DETECTION DEVICE
IL164891A (en) 2004-10-28 2009-02-11 El Far Electronics Systems 200 Electronic warning system and method
DE602006003317D1 (en) * 2006-05-23 2008-12-04 El Far Electronics Systems 200 Electronic warning system and procedure
CN102346948B (en) * 2011-09-07 2013-08-14 无锡国科微纳传感网科技有限公司 Circumference invasion detection method and system
CN105261136B (en) * 2015-10-23 2017-06-16 长沙学院 The method and device of weather interference is shielded in a kind of fiber-optic monitoring warning system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2023318A (en) * 1978-04-11 1979-12-28 Sesco Ltd Electronic analysers and vibration detector systems incorporating the same
US4409842A (en) * 1981-05-18 1983-10-18 Scott Science & Technology, Inc. Structural information detector
DE3221997A1 (en) * 1982-06-11 1983-12-15 Securiton AG, 3052 Zollikofen, Bern DEVICE FOR MONITORING ARMORED ROOMS, ESPECIALLY SAFE AND CABINETS, AND FOR GENERATING AN ALARM SIGNAL WHEN A BURGLAR ATTEMPT IS TAKEN
GB2144287B (en) * 1983-07-22 1986-10-15 Nat Res Dev Analog-to-digital converters for seismometers

Also Published As

Publication number Publication date
GB2221990B (en) 1992-04-08
GB2221990A (en) 1990-02-21

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Legal Events

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

Effective date: 19970817