EP0073934B1 - Barreau capable de déclencher une alarme - Google Patents

Barreau capable de déclencher une alarme Download PDF

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Publication number
EP0073934B1
EP0073934B1 EP82107040A EP82107040A EP0073934B1 EP 0073934 B1 EP0073934 B1 EP 0073934B1 EP 82107040 A EP82107040 A EP 82107040A EP 82107040 A EP82107040 A EP 82107040A EP 0073934 B1 EP0073934 B1 EP 0073934B1
Authority
EP
European Patent Office
Prior art keywords
alarm
lattice
wire
bar
glass
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
EP82107040A
Other languages
German (de)
English (en)
Other versions
EP0073934A1 (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 relates to an alarm-triggerable lattice rod for a protective grille against burglary according to the preamble of the first claim.
  • 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, this alarm conductor is 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 pressurized lattice tubes connected to a pressure measuring device via flexible transitions 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, i.e. if, for example, intended 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.
  • DE-C-265 216 (Meissner), from which the present invention is based, describes a lattice rod made of hollow profile for protective lattices against break-in.
  • This lattice bar is primarily intended to protect against sawing, but does not confirm an electrical circuit. Rather, this lattice rod (column 2, lines 30-31) makes a strong noise when it is sawed through.
  • the lattice bar has an iron bar, which is surrounded by a wire mesh. The entire interior is filled with molten glass.
  • this version is more difficult to manufacture because of the necessary melting and pouring in of glass and is also not designed in such a way that the alarm wire is sheared off when the wire rod is bent and cut.
  • GB-A-1 229 166 (Ariel) uses an electrical circuit, where a strong bending of the lattice bar causes the actuation of a circuit by two conductive tubes arranged one inside the other touching each other. There are a number of thin, insulated wires in the inner tube. If the two pipes, e.g. during a bending process, touch each other, or the wire e.g. is cut in a sawing process or torn during a bending process, a circuit is actuated for an alarm circuit. Furthermore, sawing through the tube 2 brings about a bridging of the air gap to the tube 1 and thus the actuation of the circuit.
  • DE-A1-2 925 624 (Geiger) describes a safety grate in which the individual bars are hollow and filled with gas or air.
  • the gratings are especially for power and nuclear power plants, e.g. provided in the inlet channel for the cooling water. This creates problems e.g. with the sealing and the conductivity of water.
  • the design can be compared to ARIEL, but is simpler with the exception of the waterproofing.
  • Another feature of this version is the pretensioning of the alarm wire by means of a spring
  • CH-A-148 303 describes various electrical or electromechanical alarm systems for protection against theft and burglary. It only marginally affects the present application.
  • the object of the invention is to create an alarm-triggerable 'grid rod for protective grids against burglary and theft, the grid rod being to be protected against bending and severing.
  • the grating rod is also intended to actuate a circuit for an alarm system.
  • the lattice bar should also be designed so that it can also be used against other influences behaves as insensitive to violence.
  • 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 and frame surrounding the door leaf in the closed state several, in this example 2, door hinges 3.
  • a security lock 10 with an opening handle is also arranged in the door leaf; in addition, for safety reasons, the relatively long grating bars 1 are connected to one another by cross members 5.
  • the door frame 4 is firmly connected to the surroundings, for example a gallery, a wall, a corridor, etc., by walling in the numerous anchors 7 surrounding it.
  • 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 between the tube wall 23, preferably a steel tube, and the alarm composite glass rod 20.
  • other elastic material can also be used. such as neoprene rubber, etc. can be used. It is preferable to use a material that is rot-proof for a relatively long period of time, in particular does not become brittle in the cold, and in this state easily crumbles when shaken, and is easy to insert 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 in one on one Side open lattice rod 1 introduced.
  • An elastically deformable buffer is inserted into the inside of the grille on the closed side.
  • the alarm composite glass rod is placed on this buffer as it were, ie the weight of the Atarm composite 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 'by soldering. This type of arrangement and wiring is shown in Fig. 3a.
  • 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 relatively large spatial displacement to relieve the tension. As a result of this shift, the alarm wire is finally torn.
  • 3b shows in a simplified manner the relationships which 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. This is replaced by the absolute extension I.
  • the elasticity range of glass corresponds to the length BLG and is indicated by the elasticity line 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 because of its amorphous structure without climbing, flowing and plastic deformation, the glass body is suddenly broken.
  • the bending length BLG from the glass is achieved in the composition and with a rectangular cross-section, with a force 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 deformations given relate to a lattice bar length as they are generally used in lattice doors according to FIG. 1 and after the crossbars have been removed, 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)

Claims (3)

1. Barreau de grille (1) apte à déclencher une alarme, comportant un profilé creux (23) métallique possédant au moins un fil d'alarme (25) s'étendant à l'intérieur de ce profilé et servant à actionner un dispositif d'alarme, le fil d'alarme (25) étant disposé à l'intérieur d'un corps en verre (26) qui remplit presque totalement la cavité du barreau (1 caractérisé en ce que le corps en verre (26) est réalisé au moins en deux parties, que le fil d'alarme (25) est disposé entre les parties en verre et que des matériaux amortisseurs (22) sont disposés entre la paroi tubulaire intérieure du barreau de grille (1) et le corps en verre (26).
2. Barreau de grille selon la revendication 1, caractérisé en ce que le corps en verre (26) muni du fil d'alarme (25) peut être inséré dans la cavité du barreau de grille (1).
3. Barreau de grille selon la revendication 1 ou 2, caractérisé en ce que, lorsqu'il est endommagé, le fil d'alarme (25) actionne un circuit prévu pour une installation d'alarme.
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 EP0073934A1 (fr) 1983-03-16
EP0073934B1 true 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)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE512925C2 (sv) * 1998-01-22 2000-06-05 Leif Svensson Anordning för larmning av en lucka

Family Cites Families (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

Also Published As

Publication number Publication date
DE3269390D1 (en) 1986-04-03
EP0073934A1 (fr) 1983-03-16
ATE18309T1 (de) 1986-03-15

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