GB1267666A - Burglar alarm systems - Google Patents

Burglar alarm systems

Info

Publication number
GB1267666A
GB1267666A GB5068568A GB5068568A GB1267666A GB 1267666 A GB1267666 A GB 1267666A GB 5068568 A GB5068568 A GB 5068568A GB 5068568 A GB5068568 A GB 5068568A GB 1267666 A GB1267666 A GB 1267666A
Authority
GB
United Kingdom
Prior art keywords
terminals
cable
battens
alarm
conductor
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
GB5068568A
Inventor
Henry Francis Saunders
Arthur Guenter Rabe
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.)
BROCKS GROUP OF Cos Ltd
Original Assignee
BROCKS GROUP OF Cos 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 BROCKS GROUP OF Cos Ltd filed Critical BROCKS GROUP OF Cos Ltd
Priority to GB5068568A priority Critical patent/GB1267666A/en
Publication of GB1267666A publication Critical patent/GB1267666A/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
    • G08B13/126—Mechanical actuation by the breaking or disturbance of stretched cords or wires for a housing, e.g. a box, a safe, or a room

Landscapes

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

Abstract

1,267,666. Burglar alarms. BROCKS GROUP OF COMPANIES Ltd. 11 July, 1969 [25 Oct., 1968], No. 50685/68. Heading G4N. [Also in Division H1] In a burglar alarm including a brittle tensioned coaxial cable comprising an inner conductor and an outer conductive sheath of hard drawn metal insulated from each other, preferably by MgO powder, fracture of either conductor or a short circuit between them actuates an alarm. The surfaces of the inner conductor, of copper, and the outer conductor, of copper/nickel alloy are roughened so that the MgO powder binds against them to inhibit stripping of the cable. The cable may be used in a door, wall, floor or ceiling or as a protective grid or bars, preferably horizontal, across a window. In the latter case the cable is threaded through tubes of Al, steel or plastics and is either formed as a continuous length annealed in regions where it is to be bent or formed as separate lengths connected in series whose ends are soldered to turret terminals, or screwed or crimped to terminals. The terminals are mounted on either side of the window on insulative strips enclosed in recesses in mating pairs of wood, metal or plastics battens. The pairs of battens are provided with magnetic detectors or frangible wires which operate an alarm upon an attempt to gain access to the terminals by separating the battens.
GB5068568A 1968-10-25 1968-10-25 Burglar alarm systems Expired GB1267666A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5068568A GB1267666A (en) 1968-10-25 1968-10-25 Burglar alarm systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5068568A GB1267666A (en) 1968-10-25 1968-10-25 Burglar alarm systems

Publications (1)

Publication Number Publication Date
GB1267666A true GB1267666A (en) 1972-03-22

Family

ID=10456942

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5068568A Expired GB1267666A (en) 1968-10-25 1968-10-25 Burglar alarm systems

Country Status (1)

Country Link
GB (1) GB1267666A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2497053A1 (en) * 1980-12-23 1982-06-25 Besson Bernard Electronic security fence with alarm - uses enclosed alarm wire passing through centre of tubular alarm elements

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2497053A1 (en) * 1980-12-23 1982-06-25 Besson Bernard Electronic security fence with alarm - uses enclosed alarm wire passing through centre of tubular alarm elements

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