GB1497867A - Security system for surveying an area - Google Patents

Security system for surveying an area

Info

Publication number
GB1497867A
GB1497867A GB56093/74A GB5609374A GB1497867A GB 1497867 A GB1497867 A GB 1497867A GB 56093/74 A GB56093/74 A GB 56093/74A GB 5609374 A GB5609374 A GB 5609374A GB 1497867 A GB1497867 A GB 1497867A
Authority
GB
United Kingdom
Prior art keywords
output
cable
area
oscillator
receives
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
GB56093/74A
Other languages
English (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.)
GE Healthcare UK Ltd
Original Assignee
GE Healthcare UK 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 GE Healthcare UK Ltd filed Critical GE Healthcare UK Ltd
Priority to GB56093/74A priority Critical patent/GB1497867A/en
Priority to ZA757823A priority patent/ZA757823B/xx
Priority to US05/641,358 priority patent/US4053877A/en
Priority to SE7514372A priority patent/SE407987B/xx
Priority to AU87895/75A priority patent/AU496739B2/en
Priority to FR7539943A priority patent/FR2296891A1/fr
Priority to CA242,753A priority patent/CA1050133A/en
Priority to DE19752559060 priority patent/DE2559060A1/de
Priority to IE2837/75A priority patent/IE41988B1/en
Publication of GB1497867A publication Critical patent/GB1497867A/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
    • G08B13/22—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
    • G08B13/2497—Intrusion detection systems, i.e. where the body of an intruder causes the interference with the electromagnetic field using transmission lines, e.g. cable

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Emergency Alarm Devices (AREA)
  • Radar Systems Or Details Thereof (AREA)
GB56093/74A 1974-12-31 1974-12-31 Security system for surveying an area Expired GB1497867A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
GB56093/74A GB1497867A (en) 1974-12-31 1974-12-31 Security system for surveying an area
ZA757823A ZA757823B (en) 1974-12-31 1975-12-15 A method of and apparatus for surveying an area
US05/641,358 US4053877A (en) 1974-12-31 1975-12-16 Method of and apparatus for surveying an area
SE7514372A SE407987B (sv) 1974-12-31 1975-12-18 Sekerhetsanordning for bevakning av ett omrade
AU87895/75A AU496739B2 (en) 1974-12-31 1975-12-24 A method of and APPARATUS FOR SURVEYING AN AREA
FR7539943A FR2296891A1 (fr) 1974-12-31 1975-12-29 Procede et appareil pour l'inspection d'une surface a surveiller
CA242,753A CA1050133A (en) 1974-12-31 1975-12-30 Method of and apparatus for surveying an area
DE19752559060 DE2559060A1 (de) 1974-12-31 1975-12-30 Verfahren zur ueberwachung eines gebietes und anordnung zur durchfuehrung des verfahrens
IE2837/75A IE41988B1 (en) 1974-12-31 1975-12-30 A security system for surveying an area

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB56093/74A GB1497867A (en) 1974-12-31 1974-12-31 Security system for surveying an area

Publications (1)

Publication Number Publication Date
GB1497867A true GB1497867A (en) 1978-01-12

Family

ID=10475709

Family Applications (1)

Application Number Title Priority Date Filing Date
GB56093/74A Expired GB1497867A (en) 1974-12-31 1974-12-31 Security system for surveying an area

Country Status (9)

Country Link
US (1) US4053877A (enExample)
AU (1) AU496739B2 (enExample)
CA (1) CA1050133A (enExample)
DE (1) DE2559060A1 (enExample)
FR (1) FR2296891A1 (enExample)
GB (1) GB1497867A (enExample)
IE (1) IE41988B1 (enExample)
SE (1) SE407987B (enExample)
ZA (1) ZA757823B (enExample)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2145550A (en) * 1983-07-28 1985-03-27 Dr Maurice Bloch Remote monitoring radio link
GB2226636A (en) * 1988-12-05 1990-07-04 Plessey Co Plc A method and an apparatus for sensing the movement of a local magnetic object
RU2338260C1 (ru) * 2007-08-07 2008-11-10 Российская Федерация, от имени которой выступает Федеральное агентство по атомной энергии (Росатом) Устройство для охранной сигнализации на основе излучающего кабеля
RU2776511C1 (ru) * 2021-06-07 2022-07-21 Акционерное Общество Научно-Внедренческий Инженерный Центр "Радиус" Устройство подземной беспроводной аварийно-технологической связи

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0045335A1 (en) * 1980-08-05 1982-02-10 Stellar Systems, Inc. E field balanced phase intrusion alarm
IL62589A (en) * 1981-04-05 1988-02-29 Israel Aircraft Ind Ltd Electromagnetic field perimeter detection apparatus
US4415885A (en) * 1981-05-21 1983-11-15 Stellar Systems, Inc. Intrusion detector
US4571578A (en) * 1983-04-19 1986-02-18 The United States Of America As Represented By The Secretary Of The Air Force Intrusion barrier and detection apparatus
CA1250634A (en) * 1984-11-19 1989-02-28 Melvin C. Maki Simulated targets for detection systems
IT1218109B (it) * 1986-05-02 1990-04-12 Dei Dispositivi Elettronici In Apparecchiatura per il rilevamento di corpi in movimento sul terreno in un'area protetta,in particolare per usi militari e affini
US5430537A (en) * 1993-09-03 1995-07-04 Dynamics Research Corporation Light beam distance encoder
US6204772B1 (en) 1999-12-16 2001-03-20 Caterpillar Inc. Method and apparatus for monitoring the position of a machine
WO2003044743A2 (en) * 2001-11-20 2003-05-30 Hutchins Nicholas D Facilities management system
JP2008263302A (ja) * 2007-04-10 2008-10-30 Mitsubishi Electric Corp 侵入検知システム
US10147291B2 (en) * 2014-05-15 2018-12-04 Melo Tarcisio Caddah System and method for protecting restricted-access areas against intrusions by pedestrians and/or non-cab vehicles in general, with access permitted for vehicles with a cab, including convertible vehicles with closed top
CN106285191B (zh) * 2015-06-26 2018-09-07 奇点新源国际技术开发(北京)有限公司 周界安全防护网及周界安全防护方法
CN106297122B (zh) * 2015-06-26 2019-05-03 奇点新源国际技术开发(北京)有限公司 安全防护墙及探测器
CN106327755B (zh) * 2015-06-26 2019-03-29 奇点新源国际技术开发(北京)有限公司 安防线缆
CN105303742B (zh) * 2015-08-03 2016-10-05 山东德昶安防科技有限公司 一种电子围栏及实现方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2971184A (en) * 1957-05-14 1961-02-07 American District Telegraph Co Intruder alarm system
US3043952A (en) * 1958-09-08 1962-07-10 Gen Motors Corp Automatic car guidance system
US3031643A (en) * 1960-05-16 1962-04-24 Nat Company Inc Transmission line fence burglar alarm
GB892872A (en) * 1960-09-12 1962-04-04 American District Telegraph Co Intruder alarm systems
US3230518A (en) * 1961-03-20 1966-01-18 American District Telegraph Co Method of detecting intruders and intruder detection apparatus of the capacity-type utilizing balanced asymmetric fields
US3237105A (en) * 1962-05-09 1966-02-22 Henry P Kalmus Personnel intrusion detecting device
US3668625A (en) * 1970-09-21 1972-06-06 David Wolf Monitoring system
US3641569A (en) * 1970-10-01 1972-02-08 Raytheon Co Highway vehicle sensor system
US3750125A (en) * 1971-10-20 1973-07-31 Sperry Rand Corp Transmission line presence sensor
US3801976A (en) * 1971-12-06 1974-04-02 Sperry Rand Corp Transmission line presence sensor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2145550A (en) * 1983-07-28 1985-03-27 Dr Maurice Bloch Remote monitoring radio link
GB2226636A (en) * 1988-12-05 1990-07-04 Plessey Co Plc A method and an apparatus for sensing the movement of a local magnetic object
GB2226636B (en) * 1988-12-05 1993-01-27 Plessey Co Plc Apparatus for sensing the movement of a local magnetic object.
RU2338260C1 (ru) * 2007-08-07 2008-11-10 Российская Федерация, от имени которой выступает Федеральное агентство по атомной энергии (Росатом) Устройство для охранной сигнализации на основе излучающего кабеля
RU2776511C1 (ru) * 2021-06-07 2022-07-21 Акционерное Общество Научно-Внедренческий Инженерный Центр "Радиус" Устройство подземной беспроводной аварийно-технологической связи

Also Published As

Publication number Publication date
IE41988B1 (en) 1980-05-07
ZA757823B (en) 1976-11-24
FR2296891B1 (enExample) 1981-08-21
AU8789575A (en) 1977-06-30
AU496739B2 (en) 1978-10-26
FR2296891A1 (fr) 1976-07-30
SE7514372L (sv) 1976-07-01
IE41988L (en) 1976-06-30
US4053877A (en) 1977-10-11
SE407987B (sv) 1979-04-30
CA1050133A (en) 1979-03-06
DE2559060A1 (de) 1976-07-08

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee