Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
  • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
  • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
  • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
  • B32B17/10165—Functional features of the laminated safety glass or glazing
  • B32B17/10376—Laminated safety glass or glazing containing metal wires
• • G—PHYSICS
  • G08—SIGNALLING
  • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
  • G08B13/00—Burglar, theft or intruder alarms
  • G08B13/02—Mechanical actuation
  • G08B13/04—Mechanical actuation by breaking of glass
• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
  • H05B3/00—Ohmic-resistance heating
  • H05B3/84—Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields
  • H05B3/86—Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields the heating conductors being embedded in the transparent or reflecting material

Definitions

• the invention relates to a method for producing a multi-layered, transparent safety pane, in which a second plate-shaped element made of transparent, sheet-like material is connected to a transparent base element, which is connected to wire-like conductors that are essentially connected by the entire web width of the film runs and which can serve as conductor loops for an alarm circuit, is covered, conductor ends being conductively connected to form a continuous cable run.
• a process of the type mentioned is known from US Pat. No. 4,228,425, in which a base element and a second plate-shaped glass element are connected to one another.
• the last-mentioned glass element consists of known wire glass (pinstripe wired glass), in which wire ends protrude on two opposite sides and are connected in pairs to form a wiring harness by conductive crosspieces.
• the protruding wire ends are obviously already provided as "fringes" during manufacture. So it is necessary. that the plate-shaped wire glass element must be present in certain dimensions before assembly. This considerably limits the application and the assembly speed.
• a plastic film covered with wire-like conductors is used as the material for the second plate-shaped element
• the second plate-shaped element is connected to the base element.
• a film is assumed as an intermediate product which is supplied as an "endless web" and with which window surfaces to be protected can be provided, preferably glued, from outside or inside.
• Such films are preferably very tough and tear-resistant to be made from a plastic material which does not tear even if the glass pane itself is destroyed by the action of force. Such films also prevent glass fragments from being flung around in such a case.
• Foils provided with wires are known.
• the known films are 'but such that they are each provided with wires, the free ends on both sides of the film.
• the assembly time can be significantly reduced if there are free wire ends to be connected on only one side, so that a cut is made only on the side provided with free conductor ends. Accordingly, there is the further task of specifying a transparent plastic film which is particularly advantageously suitable for the method according to the invention.
• a solution to this subtask is a film in which the conductors are laid next to one another in a U-shape or in an alternating manner, the free U-webs ending on one side of the conductor.
• crossbars can be understood to mean various electrical connections, including those known from the prior art mentioned at the outset.
• short pieces of wire can also be used which are conductively connected to the wire ends by soldering or also by mechanical pressing or connecting.
• the film is preferably exposed from the flat side or from the edge in the region of the edge up to the conductors. The exposure can take place in such a way that a strip separating the edge along the entire length of the plastic film has a width of approximately 0.5-1.5 cm, which is simply pulled off from the conductors and from the residual film. This can be achieved simply by creating a parting line by heating.
• the deepening and exposure can, however, also be produced by a melting process, with an edge-parallel, strip-shaped deepening extending over more than two conductors taking place. Such deepening can be formed by a solution or melting process.
• non-insulated wire is used for the crossbars, which can then be provided with a protective coating.
• the protective coating can be a thin, dried lacquer coating or also a thin piece of film which is subsequently connected to the carrier film by welding or gluing.
• the wire forming the conductor loops also forms a notable reinforcement of the film material against tearing or cutting. To increase the sensitivity, it is proposed that the film material have no higher longitudinal expansion limit than the material of the conductor used.
• the material of the conductor is an optically conductive glass fiber or a glass fiber bundle. These materials create significant reinforcement against tearing or cutting. This can optically too recognizing path of the signal carrier (light beam) can be opto-electronically detected in a simple manner.
• the bridging elements to be regarded as conductive crossbars are known from glass fiber technology. Such crosspieces can then be attached laterally in the region of the cut edge at the respective interfaces of the glass fibers.
• Films for the purposes mentioned are usually produced as multilayer films, which are also known as
• a polyester film made of polyethylene terephthalate Baois is preferably produced as the carrier material for the films or film layers.
• the film preferably has a thickness lying between 0.05 and 2 mm.
• Glass bundle thickness is between 0.1 and 1.0 mm, it being possible to deviate from these values downwards or upwards for special purposes or unusual formats of the pane to be protected.
• polyester films instead of the polyester films mentioned, other transparent plastic materials can also be used, for example polypropylene or polyvinyl chloride.
• FIG. 1 a shows a multilayer, transparent safety pane with a safety film 1
• FIG. 1b shows a representation similar to FIG. 1a, but with a different embodiment of the security film
• FIG. 2 shows another embodiment with a detail in the area of the transverse webs connecting the wires; 1 Figure 3 shows an embodiment with fiber optic conductors.
• FIG. 4 shows an embodiment with meandering conductors.
• Example 1 (see FIG. 1a)
• the film material for security film 1 is delivered in 10 rolled-up webs 30 m long and 1.20 m wide.
• the film material is made
• a transparent carrier film 1' made of a transparent polyester film based on polyterephalate with a ' thickness of 0.1 mm and
• 0.15 mm consist of a predominantly copper-containing conductive alloy with a low elongation limit compared to the film material, so that when the film 25 i is stretched or torn, the wire 4 also tears.
• the edges of the film 1 with the protruding wire ends 17 are covered by a comb 22 which is cut to the length of the film and which has conductive webs 6 which are set apart from one another on the inside, each of which has the length of the distance between two wires with a corresponding gap Wires 4, 4 'are connected to one another in pairs and alternately by the combs 22 arranged in the region of the outer sides 5, 5'.
• the prepared film is then glued onto the glass pane 10 with an adhesive and the conductor ends 17 'are connected to an electrical circuit (not shown).
• the film material for the security film consists of a sandwich film, in which a 0.5 mm thick aluminum wire is embedded between a carrier film and a cover film, each based on polypropylene.
• the aluminum wire is laid in parallel U-shaped loops, in which the wire ends 17 end only on one side of the film.
• the wires 4 are connected to one another to form a meandering, continuous line by two each, to an adjacent Ü-confi. wires belonging to the guration are subsequently connected to one another by conductive cross bars 6 arranged in the region of the outside, the cross bars consisting of short, flat pieces of aluminum tape.
• the crossbars are soldered to the wire material. After storing the crossbars and establishing an electrical connection, as well. Verification, the connection areas with the crossbars 6 are provided with a protective coating 12 made of the material of the
• Foil itself in this case polypropylene, is applied in a dissolved form.
• the end points of the wires can be connected to a conventional conductor, which connects them to an electronic monitoring device.
• a glass pane in square format (side length 1 m) for a showcase is to be provided with a security film 1.
• the film material for security film 1 is delivered in rolled-up webs 20 m long and 1.30 wide.
• the film material is made
• the embedded glass fiber bundle 4 significantly increases the strength of the film material and is also suitable for producing a conductor loop.
• transverse webs 6 ′′ are placed in front of the cut edge 14 of the film, which are designed as an element which has two inner mirror surfaces 19, 20 which transmit the light beam arriving in the line into the next glass fiber line. Web 6 "is only hinted at. Such elements are commercially available.
• the loose ends of the glass fiber bundle are connected to a corresponding optical light input and output, which is followed by a known monitoring circuit.
• the edges themselves are provided with a transparent cover strip, which protects the material from damage and the influence of dust.
• the glued-on security film 1 fulfills a double purpose; once it helps to strengthen and hold the glass together. Secondly, it allows a connection to an electronic monitoring
• a narrow cellar window pane 10 made of glass with a height of 80 cm and a width of 2 m is to be covered with a security film.
• a standardized, narrow security film 1 is available for this purpose, which is covered with a meandered wire made of 0.3 mm thick copper braid. The distance between the meanders is 3.5 cm. The film is only cut on its end faces; the wires leading out are connected directly to an alarm system.

Landscapes

• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Burglar Alarm Systems (AREA)
• Laminated Bodies (AREA)
• Joining Of Glass To Other Materials (AREA)
• Micromachines (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6738346

Family Applications (1)

Country Status (4)

Cited By (1)

Citations (3)

• 1982
  • 1982-03-24 DE DE19828208311U patent/DE8208311U1/de not_active Expired
• 1983
  • 1983-03-23 WO PCT/EP1983/000089 patent/WO1983003384A1/de not_active Ceased
  • 1983-03-23 DE DE8383900926T patent/DE3366870D1/de not_active Expired
  • 1983-03-23 EP EP83900926A patent/EP0104192B1/de not_active Expired
  • 1983-03-23 JP JP58501038A patent/JPS59500763A/ja active Granted

Patent Citations (3)

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