EP0712101A1 - Alarmglasscheibe mit semi-reflektierender Oberflächenschicht - Google Patents

Alarmglasscheibe mit semi-reflektierender Oberflächenschicht Download PDF

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Publication number
EP0712101A1
EP0712101A1 EP95402479A EP95402479A EP0712101A1 EP 0712101 A1 EP0712101 A1 EP 0712101A1 EP 95402479 A EP95402479 A EP 95402479A EP 95402479 A EP95402479 A EP 95402479A EP 0712101 A1 EP0712101 A1 EP 0712101A1
Authority
EP
European Patent Office
Prior art keywords
layer
semi
glass
alarm
conductive
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.)
Withdrawn
Application number
EP95402479A
Other languages
English (en)
French (fr)
Inventor
Dieter Peetz
Andreas Reidt
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.)
Saint Gobain Glass France SAS
Saint Gobain Vitrage SA
Original Assignee
Saint Gobain Vitrage SA
Saint Gobain Vitrage International SA
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 Saint Gobain Vitrage SA, Saint Gobain Vitrage International SA filed Critical Saint Gobain Vitrage SA
Publication of EP0712101A1 publication Critical patent/EP0712101A1/de
Withdrawn legal-status Critical Current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
    • G08B13/04—Mechanical actuation by breaking of glass

Definitions

  • the present invention relates to a glazing formed from tempered glass, covered with a surface layer, semi-reflecting and conductive, and provided with solder connections for conductors connected to an electric alarm circuit, in order to serve as alarm glazing.
  • the panes with semi-reflecting surface layers find a very wide application both as sun protection glasses and also as thermal protection glasses with high heat insulation.
  • these semi-reflective layers currently used these are generally multilayer systems, for which the real functional layer is a silver layer, coated between the protective metallic layers and those of metallic oxides with anti- reflection and finish.
  • the semi-reflective surface layers usually used, including the functional silver layer, are characterized by a certain electrical conductivity.
  • a conductive surface layer as a break-in detector is well known, as is the application of toughened panes provided with such layers to the alarm glazing function, by connecting the surface film, which serves as a signal transmitter, to an electrical alarm circuit.
  • the surface coating forms the signal transmitter over its entire surface, and contact with the conductive layer is established at two diametrically opposite angles of the glass.
  • the toughened glass sheet, provided with the conductive layer is assembled by means of a thermoplastic intermediate film with a second sheet, not toughened or having undergone another type of toughening , so that in case of breakage of the glass carrying the conductive layer, the laminated safety glass undergoes bending as a result of the expansion of the first sheet, on which the conductive layer is arranged on the convex face. This layer will therefore be interrupted with greater probability.
  • a small partial surface of the conductive layer is isolated from the latter in a peripheral or angular zone. While the rest of the layer serves as a heating resistance, the electrically insulated partial surface is provided with contact electrodes and serves as a burglar detector.
  • the semi-reflecting layer is placed on one side and the alarm loop on the other, one or the other of these two devices is in all cases altered by contact with the rollers.
  • the alarm loop is located on the underside of the glass, it can also happen that the transport rollers become charged with impurities or ink imprints, which will later be printed on the glass.
  • the object of the present invention is to design a glazing unit provided with a semi-reflective coating and with a visible alarm loop, which can be manufactured in conventional quenching ovens, without alteration of the semi-reflective layer or of the glass surface and of the intrusion detector.
  • the technical problem posed is solved according to the invention in that the semi-reflecting conductive layer is removed over a small part of its surface, preferably in a corner of the glass, and in that in this zone a burglar detector , which is in the form of a conductive loop consisting of a baked conductive enamel, is arranged in direct contact with the surface of the glass.
  • the alarm loop and the semi-reflecting layer which are independent of one another and fulfill completely different functions on the same and single face of the glass, without this results in reciprocal disturbance or interference.
  • the alarm loop can have relatively small dimensions, so that the protection against the sun or the heat provided by the layer is very little diminished by the absence of the latter in the region of the loop.
  • the alarm loop does not come into contact as such with the conductive layer, so that the latter can have no negative effect on the alarm function of the conductive loop. In this way, it becomes possible to completely free the other side of the glass. Consequently, the latter can now be arranged without problem with its free surface on the conveyor rollers of the quenching furnace, and be heated and quenched according to the usual method, without there being any possible danger of damage or soiling. the layer or surface of the glass.
  • the glazing with alarm according to the invention can in principle be used in the form of a monolithic part.
  • the semi-reflecting layer is capable of withstanding atmospheric agents over a long period.
  • Such resistant layers consist for example of tin oxide and are produced by pyrolysis, by depositing on the glass sheets a solution containing an organometallic compound, and by heating this layer to obtain the corresponding oxidized form.
  • This is the more often, in the case of semi-reflecting layers with improved thermal insulation and protection against solar radiation, layers which have been deposited according to a vacuum process. This kind of layers has a much lower resistance to atmospheric agents.
  • this spacer frame 3 is an insulating glazing consisting of two glass sheets 1 and 2, which are assembled by means of a spacer frame 3.
  • the side faces of this spacer frame 3 in report with the glass sheets are usually glued to them by a sticky sealant 4, and the leave formed by the edges of the glass sheets and the spacer frame 3 is filled with another sticky sealant 5.
  • the sealed space thus delimited between the sheets of glass is filled with air or other gas.
  • this surface layer 8 it is preferably a transparent deposit whose reflection is increased in the field of infrared radiation; it therefore serves as a protective glass against solar radiation, and lets most of the visible light pass without significant attenuation, while it largely reflects thermal radiation. These properties necessarily correspond to an electrical conductivity of the improved layer.
  • the surface layer 8 is subsequently removed.
  • the elimination of the latter at its periphery can be carried out by mechanical or thermal methods and the technique itself is well known. This measure is useful in order to prevent the surface layer 8 from corroding by moisture which could diffuse from the edge.
  • this external glass sheet 1 In order to give this external glass sheet 1 the properties of an alarm glass, it is provided for example in one of its angular zones with an alarm loop 12 consisting of a conductive enamel. From this alarm loop 12 lead from the conductors 13 to the welded connections 14, which are placed very close to the edge of the glass sheet 1.
  • the conductors 13 and the connections to be welded 14 are part of the same block as alarm loop 12 and are arranged at the same time as the latter.
  • the alarm loop 12, the conductors 13 and the connections to be welded 14 have no contact with the surface layer 8.
  • the layer 8 is eliminated not only on the peripheral zone 10, but also inside zone 16, in which the alarm loop 12 and the supply circuits 13 are arranged.
  • the elimination of the layer 8 from this zone is carried out in a functional manner by means of a mechanical stripping device with numerical control, of the same type as that which is known for the elimination of the layer from the peripheral zone 10 d '' a window fitted with a coating.
  • the alarm loop 12 accompanied by the supply circuits 13 and the connections to be welded 14 is printed according to the process of screen printing on the surface of the glass.
  • the glass sheet 1 is brought to the tempering temperature of approximately 650 ° C. in a conventional quenching oven, which allows the baking of the printed baking ink, and this sheet is then thermally quenched by brutal cooling according to the well known procedure.
  • the surface layer 8 must of course be formed so that the heat treatment process can be carried out without damage.
  • layer systems with high thermal resistance are however known.
  • a preferential layer system of this type comprises for example five successive layers, namely: an adhesive layer of tin oxide, a metallic and underlying protective layer made of nickel-chromium, the actual functional layer which is in silver, a protective metallic layer of nickel-chromium at the top and a finishing layer of tin oxide.
  • the layer 8 with high heat resistance can of course have a different structure.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
  • Joining Of Glass To Other Materials (AREA)
EP95402479A 1994-11-10 1995-11-07 Alarmglasscheibe mit semi-reflektierender Oberflächenschicht Withdrawn EP0712101A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4440062 1994-11-10
DE19944440062 DE4440062A1 (de) 1994-11-10 1994-11-10 Alarmglasscheibe mit einer teilreflektierenden Oberflächenschicht

Publications (1)

Publication Number Publication Date
EP0712101A1 true EP0712101A1 (de) 1996-05-15

Family

ID=6532905

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95402479A Withdrawn EP0712101A1 (de) 1994-11-10 1995-11-07 Alarmglasscheibe mit semi-reflektierender Oberflächenschicht

Country Status (2)

Country Link
EP (1) EP0712101A1 (de)
DE (1) DE4440062A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0989781A2 (de) * 1998-09-25 2000-03-29 Schott Glas Mehrscheibenisolierglas und Verfahren zur Herstellung von beschichteten Flachgläsern zur Herstellung von Mehrscheibenisolierglas

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0058348A2 (de) * 1981-02-16 1982-08-25 VEGLA Vereinigte Glaswerke GmbH Alarmglasscheibe und Verfahren zu ihrer Herstellung
DE3716766A1 (de) 1986-05-22 1987-11-26 Glaverbel Verglasungstafel
EP0451608A2 (de) 1990-04-10 1991-10-16 VEGLA Vereinigte Glaswerke GmbH Elektrisch beheizbare Alarmglasscheibe

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0058348A2 (de) * 1981-02-16 1982-08-25 VEGLA Vereinigte Glaswerke GmbH Alarmglasscheibe und Verfahren zu ihrer Herstellung
DE3716766A1 (de) 1986-05-22 1987-11-26 Glaverbel Verglasungstafel
EP0451608A2 (de) 1990-04-10 1991-10-16 VEGLA Vereinigte Glaswerke GmbH Elektrisch beheizbare Alarmglasscheibe

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0989781A2 (de) * 1998-09-25 2000-03-29 Schott Glas Mehrscheibenisolierglas und Verfahren zur Herstellung von beschichteten Flachgläsern zur Herstellung von Mehrscheibenisolierglas
EP0989781A3 (de) * 1998-09-25 2000-06-21 Schott Glas Mehrscheibenisolierglas und Verfahren zur Herstellung von beschichteten Flachgläsern zur Herstellung von Mehrscheibenisolierglas
US6268594B1 (en) 1998-09-25 2001-07-31 Schott Glas Appliance such as a refrigerator or freezer with a transparent viewing door and a method of manufacture of a refrigerator or freezer with a transparent viewing door

Also Published As

Publication number Publication date
DE4440062A1 (de) 1996-05-30

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