GB1244031A - Improvements relating to security fences - Google Patents

Improvements relating to security fences

Info

Publication number
GB1244031A
GB1244031A GB77868A GB77868A GB1244031A GB 1244031 A GB1244031 A GB 1244031A GB 77868 A GB77868 A GB 77868A GB 77868 A GB77868 A GB 77868A GB 1244031 A GB1244031 A GB 1244031A
Authority
GB
United Kingdom
Prior art keywords
wire
improvements relating
fence
mesh
intruder
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
GB77868A
Inventor
Lionel Howard Bradley
Cyril Maskery
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.)
British Railways Board
Original Assignee
British Railways Board
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 British Railways Board filed Critical British Railways Board
Priority to GB77868A priority Critical patent/GB1244031A/en
Publication of GB1244031A publication Critical patent/GB1244031A/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
    • G08B13/02—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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

1,244,031. Intruder alarms. BRITISH RAILWAYS BOARD. 2 April, 1969 [5 Jan., 1968], No. 778/68. Heading G4N. An intruder alarm comprises an electrified fence of insulated wire, an alarm being operated when current flow is interrupted. The wire may be solid or stranded, single or multicore, screened, and braided with metal or textile. The fence is formed by knitting a single wire or a plurality of wires in a close mesh, the wire being firmly secured at cross-over points in the mesh.
GB77868A 1968-01-05 1968-01-05 Improvements relating to security fences Expired GB1244031A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB77868A GB1244031A (en) 1968-01-05 1968-01-05 Improvements relating to security fences

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB77868A GB1244031A (en) 1968-01-05 1968-01-05 Improvements relating to security fences

Publications (1)

Publication Number Publication Date
GB1244031A true GB1244031A (en) 1971-08-25

Family

ID=9710355

Family Applications (1)

Application Number Title Priority Date Filing Date
GB77868A Expired GB1244031A (en) 1968-01-05 1968-01-05 Improvements relating to security fences

Country Status (1)

Country Link
GB (1) GB1244031A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2656349A1 (en) * 1976-12-13 1978-06-22 Ernst Blaser High security interwoven wire fence - has plastic sheath enclosing steel reinforcing wire and resistance wire connected in bridge circuit
DE2840966A1 (en) * 1977-09-28 1979-04-19 Roderick Iain Davidson SAFETY DEVICE FOR BARRIERS
EP0049979A2 (en) * 1980-10-10 1982-04-21 Pilkington P.E. Limited Intruder detection security system
FR2510785A1 (en) * 1981-07-31 1983-02-04 Guerineau Yves Electronically monitored metal wire security fence - has sections linked in pairs for comparison of resistance to check possible break-in using A=D converter, comparator and memorised tables
EP0385862A1 (en) * 1989-03-02 1990-09-05 Dirickx S.A. Manufacturing process of an antiburglar security mesh, and mesh made by this process
CN101789159B (en) * 2010-01-13 2011-08-31 北京世纪瑞尔技术股份有限公司 Foreign body intrusion signal acquisition device

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2656349A1 (en) * 1976-12-13 1978-06-22 Ernst Blaser High security interwoven wire fence - has plastic sheath enclosing steel reinforcing wire and resistance wire connected in bridge circuit
DE2840966A1 (en) * 1977-09-28 1979-04-19 Roderick Iain Davidson SAFETY DEVICE FOR BARRIERS
EP0049979A2 (en) * 1980-10-10 1982-04-21 Pilkington P.E. Limited Intruder detection security system
EP0049979B1 (en) * 1980-10-10 1987-03-18 Pilkington P.E. Limited Intruder detection security system
FR2510785A1 (en) * 1981-07-31 1983-02-04 Guerineau Yves Electronically monitored metal wire security fence - has sections linked in pairs for comparison of resistance to check possible break-in using A=D converter, comparator and memorised tables
EP0385862A1 (en) * 1989-03-02 1990-09-05 Dirickx S.A. Manufacturing process of an antiburglar security mesh, and mesh made by this process
FR2643840A1 (en) * 1989-03-02 1990-09-07 Dirickx Sa METHOD FOR MANUFACTURING AN ANTI-BREAKING SECURITY GRILL AND GRILL OBTAINED BY THIS PROCESS
CN101789159B (en) * 2010-01-13 2011-08-31 北京世纪瑞尔技术股份有限公司 Foreign body intrusion signal acquisition device

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