EP0073934A1 - Barreau capable de déclencher une alarme - Google Patents

Barreau capable de déclencher une alarme Download PDF

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Publication number
EP0073934A1
EP0073934A1 EP82107040A EP82107040A EP0073934A1 EP 0073934 A1 EP0073934 A1 EP 0073934A1 EP 82107040 A EP82107040 A EP 82107040A EP 82107040 A EP82107040 A EP 82107040A EP 0073934 A1 EP0073934 A1 EP 0073934A1
Authority
EP
European Patent Office
Prior art keywords
alarm
lattice
wire
glass
bar
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
EP82107040A
Other languages
German (de)
English (en)
Other versions
EP0073934B1 (fr
Inventor
Walter Bucher
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.)
Bauer Kassenfabrik AG
Original Assignee
Bauer Kassenfabrik AG
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 Bauer Kassenfabrik AG filed Critical Bauer Kassenfabrik AG
Priority to AT82107040T priority Critical patent/ATE18309T1/de
Publication of EP0073934A1 publication Critical patent/EP0073934A1/fr
Application granted granted Critical
Publication of EP0073934B1 publication Critical patent/EP0073934B1/fr
Expired legal-status Critical Current

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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

Definitions

  • the invention is in the field of security technology and relates to an alarm triggerable grid rod with a hollow profile and with at least one alarm wire running therein.
  • grilles and doors are a conventional means of monitoring passages by means of a barrier through them. If, for example, there are lattice doors, alarm cables are drawn into the tubes, which are usually hollow, and routed to the alarm center via a flexible transition. When sawing through the bars, these alarm conductors are cut together with the tube; This intervention then triggers the alarm in the alarm center and indicates the location of the intrusion point.
  • Lattice doors for example, whose hollow profiles are filled with compressed air, this is also a known procedure for additionally securing such surface surveillance, and are also largely insensitive to deflection.
  • the flexible U eber réelle at a pressure Measuring device connected to the pressurized grate tubes suffer a pressure drop when damaged by sawing and welding, which triggers the alarm in the monitoring center and indicates the break-in point accordingly.
  • an alarm can only be triggered in the event of severe deformation, that is to say if, for example, predetermined breaking points begin to tear when the deformation has taken place.
  • a major disadvantage of this type of protection is that a complex manufacturing process for the entire construction is required for the pneumatic tightness.
  • the lattice door shown in Fig. 1 essentially consists of a door leaf frame 2 with fitted, for example vertical, lattice bars 1, a frame 4 surrounding the door leaf in the closed state and several, in this example 2, door hinges 3.
  • a security lock 10 with an opening handle is also arranged in the door leaf; moreover, for safety reasons, the relatively long bars 1 are connected to one another by cross members 5.
  • the whole arrangement can be arranged rotated by 90 °, namely shorter, horizontally extending bars and a few cross members connecting the bars in the vertical direction.
  • the door frame 4 is firmly connected to the surroundings by the walling in of the numerous anchors 7 surrounding it, for example a gallery, a wall, a corridor, etc.
  • the door leaves and door frames are in fixed engagement with one another through the displaceable locking bar ends 9, 9 '. All of these peg-shaped means causing the intervention are protected in such a way that a simple sawing through to avoid the intervention is not possible.
  • a lattice bar according to the invention is constructed as follows: FIG. 3
  • An alarm laminated glass rod 20 is embedded over its entire length in a hollow lattice rod 1, which is sufficiently strong to withstand mechanical influences due to its wall thickness.
  • the cross section of the lattice bar can have any profile, round, square, rectangular, etc.
  • a silicone layer is provided as an embedding 22.
  • other elastic material such as neoprene rubber etc. can also be used. It is preferable to use a material that is rot-proof over a relatively long period of time, especially if it is cold, and if it is shaken, it will not become brittle easily crumbled, and easily inserted into the spaces between glass and metal.
  • the embedding material should be largely chemically neutral.
  • the alarm composite glass rod embedded in the lattice consists of at least two glass bodies 26, a spacer 24 arranged between the glass bodies and an alarm wire 25 embedded therein.
  • the spacer can easily consist of the adhesive layer which produces the glass composite, in which an approx. 0.06 mm thick alarm wire 25 runs. It is important to ensure that the hair-fine alarm wires are not pinched at any point, because a pinch point that deforms the wire more and more due to vibration pressures can cause a false alarm over time.
  • the entire assembly is surrounded by a hermetic seal, a sealing layer, or only attached via the gap-like longitudinal opening. This termination serves as a corrosion barrier 21 because the alarm wires must be protected against any corrosion.
  • the alarm laminated glass rod 20 is inserted into a lattice rod 1 that is open on one side.
  • An elastically deformable buffer is inserted into the inside of the grille on the closed side.
  • the alarm laminated glass rod is placed on this buffer, i.e. the weight of the alarm laminated glass rod rests on this elastic base.
  • the alarm wire runs twice between the vitreous bodies over a loop; both ends of the alarm wire lie on one side and thus form an incoming wire part 25 and a returning wire part 25 '(Fig. 3a).
  • the two ends can be connected to the main line 30, 30 'via soldering power. This type of arrangement and wiring is shown in Fig. 2a.
  • the two conductors 30, 30 'of the main line are routed in a known manner inside the hinge from the door leaf via the frame to the outside.
  • the lattice bar according to the invention is insensitive to vibrations, such as those that occur when a lattice door slams shut, as well as weather or climate-related effects of temperature. Bending to a limited extent (this dimension will be given below) is also possible without triggering the alarm due to the inherent elasticity of the glass. However, as soon as the glass rod breaks due to greater deformation, the force built up by the tension in the glass causes a disproportionately large spatial shift to relieve the tension. As a result of this shift, the alarm wire is finally torn.
  • 3b shows in a simplified manner the relationships that bring about the desired effect, that is to say the tearing of the alarm wires.
  • the diagram shown corresponds essentially to a stress / strain diagram, but without specifying the relative strain.
  • the absolute extension takes the place of this.
  • the range of elasticity of glass corresponds to the length BLG and is indicated by the straight line of elasticity EG.
  • a straight line of elasticity EM for metal, which extends far along the length axis, is intended to indicate a certain energy store from the elastic deformation of the grating.
  • point B of the stress / strain curve of the glass occurs because of its amorphous structure without climbing, flowing and plastic deformation the sudden fracture of the stressed vitreous body.
  • 3b shows the relatively large spatial displacement of the glass particles under the action of tension by a curve which drops rapidly from the breaking length at point B, ie the tension is relieved and the length is rapidly displaced.
  • F denotes the dislocation area in which the shear effect on the alarm wires is to take place. The relatively thin wires are cut with little force by the glass fragments and an alarm is triggered.
  • the breaking length BLG of the glass is achieved in the composition and in the case of a rectangular cross-section, with a force acting in the grid area up to a deformation of up to 5 mm and with a force perpendicular to the grid surface up to a deformation of 20 mm.
  • these are the permanent plastic deformations of the lattice rod after an alarm is triggered; the elastic action or the influence of the spring force can then no longer be measured as a dynamic variable.
  • the on given deformations relate to a lattice bar length as they are generally used in lattice doors according to FIG. 1 and after removing the cross members as shown in Fig. 2. It is no longer possible for a small person or even a child to climb through such gaps in a grating device secured according to the invention.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
  • Incineration Of Waste (AREA)
EP82107040A 1981-08-28 1982-08-12 Barreau capable de déclencher une alarme Expired EP0073934B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82107040T ATE18309T1 (de) 1981-08-28 1982-08-12 Alarmausloesefaehiger gitterstab.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH556481 1981-08-28
CH5564/81 1981-08-28

Publications (2)

Publication Number Publication Date
EP0073934A1 true EP0073934A1 (fr) 1983-03-16
EP0073934B1 EP0073934B1 (fr) 1986-02-26

Family

ID=4295699

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82107040A Expired EP0073934B1 (fr) 1981-08-28 1982-08-12 Barreau capable de déclencher une alarme

Country Status (3)

Country Link
EP (1) EP0073934B1 (fr)
AT (1) ATE18309T1 (fr)
DE (1) DE3269390D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999038134A1 (fr) * 1998-01-22 1999-07-29 Leif Svensson Dispositif d'alarme

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE265216C (fr) *
CH148303A (fr) * 1929-10-22 1931-07-15 Bucher Samuel Installation électrique de protection contre les vols, effractions, etc.
GB1229166A (fr) * 1969-04-28 1971-04-21
DE2925624A1 (de) * 1979-06-26 1981-01-15 Geiger Maschf Helmut Sicherheitsrechenrost

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE265216C (fr) *
CH148303A (fr) * 1929-10-22 1931-07-15 Bucher Samuel Installation électrique de protection contre les vols, effractions, etc.
GB1229166A (fr) * 1969-04-28 1971-04-21
DE2925624A1 (de) * 1979-06-26 1981-01-15 Geiger Maschf Helmut Sicherheitsrechenrost

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999038134A1 (fr) * 1998-01-22 1999-07-29 Leif Svensson Dispositif d'alarme

Also Published As

Publication number Publication date
DE3269390D1 (en) 1986-04-03
ATE18309T1 (de) 1986-03-15
EP0073934B1 (fr) 1986-02-26

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