A BURGLARY-PROOF DEVICE

Abstract: A triple-glazed window (5-7) for burglary protection, in which a catch (1) is disposed at at least two opposing edges of the glass pane or panes (5-7), the catch (1) grasping about the edge of the glass pane (5), extending through the frame (4) of the window casement, and being fixed (15) on the inside of the frame (4).

Description: A BURGLARY-PROOF DEVICE TECHNICAL FIELD The present invention relates to a device in window casements, in particular window casements in which one or more window panes are retained in a frame by means of an exteriorly-placed locking strip, in order to impair - and if possible - to prevent unauthorised re- oval of the panes from the frame. BACKGROUND ART In recent years, primarily with a view to energy savings, triple-glazed windows have become steadily more common, in which three glass panes are sandwiched together with interjacent sealing strips for realising two sealed, thermally-insulating spaces. The three glass panes are mounted in a sash or frame by means of a strip which is normally fixedly-screwed into the frame while urging the glass pane unit against a sealing strip in the frame. Unauthorised removal of a glass pane unit from such a frame has proved to be re- latively simple and may be executed both rapidly and in almost total silence, whereby unauthorised persons may readily gain access to the premises inside and to any object or item which may be found there. Thus, triple-glazed windows have proved to be but flimsy protection against burglary. PROBLEM STRUCTURE Thus, the task forming the basis of the present invention is to reduce, and if possible preempt, the possibilities of such unauthor¬ ised entry as are disclosed in the preceding paragraph. SOLUTION This task is solved according to the present invention in the device disclosed by way of introduction, in that there is disposed, at at least two opposing edges of the glass pane or panes, a catch which grasps about the edge of the pane, extends through the frame and is fixed on the inside of the frame. The end of the catch ter¬ minates in the interior of the frame, is threaded and is fixed by means of a nut. The catch is manufactured from a flat iron blank whose short end is bent at approximately 90° or more and whose other end is welded onto a rod provided with a threaded end for engagement with a nut. Recesses for the bent flat iron end are provided in the strip for fixed retention of the glass pane or panes in the frame. The frame is intended for mounting of triple-glazed windows, the catch extending between the frame and the edge of the window panes which are sandwiched with interjacent sealing strips, and the bent end grasps about the edge of the outermost window pane, while the threaded end of the catch extends through a hole in the frame for fixing by means of a nut. ADVANTAGES As a result of the present invention, there will be realised an extremely simple device for as good as totally reliable prevention of the unauthorised removal of the glass panes from a window without occasioning undue alteration, and will, in all probability, deter people from even attempting unlawful or unauthorised removal of the window panes. To remove the catch or catches, it is first necessary to remove the nuts from the inside, whereafter it is possible to re¬ move the catch, once possibly provided masking and locking strips have been dismounted. A device according to the present invention is not only simple by its very nature but may also be manufactured at extremely low cost. Nor is a device according to the present invention restricted to use on factory-finished windows and window frames, but may very well be provided on existing triple-glazed windows, without the ne¬ cessity of costly modification operations. BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWING The nature of the present invention and its aspects will be more readily understood from the following brief description of the accompanying Drawing, and discussion relating thereto. In the accompanying Drawing: Fig. 1 is a schematic side elevation of a catch for a device according to the present invention; Fig. 2 is a view taken in the direction of the arrow II in Fig. 1; and Fig. 3 is a schematic cross-section through a part of a triple- -glazed window provided with a catch according to the present in¬ vention. DESCRIPTION OF FREFESRED EMBODIMENT Referring to the Drawing, the embodiment of the present in- vention depicted thereon includes a catch 1 which consists of a flat iron portion 2 and a round rod portion 3. This latter is threaded and is fixedly welded to the flat iron portion 2 which is advan¬ tageously manufactured of stainless steel sheet, or some cor¬ responding material, whose opposing end is bent at an angle of slightly more than 90°. On the inner side, the flat iron portion 2 is provided with a coating A of cellular rubber or similar material. The bent portion is die-stamped to improve rigidity. Fig. 3 illustrates more closely the intention of the catch 1: namely to secure a glass pane unit in a window frame 4. In the pre- sent case, the glass pane unit consists of three window panes 5, 6 and 7. These are sandwiched with interjacent rubber strips 8 and 9 so as to form two thermally-insulating spaces between the window panes 5-7. A sealing strip 10 is disposed between the frame 4 and its most proximal window pane 7. In normal cases, the window pane unit is fixedly-retained against the frame 4 and the sealing strip 10 solely by means of a triangular strip 11 which is fixedly screwed into a frame portion 12 in a per se conventional manner. In the frame 4, the threaded portion is disposed in a through hole 14 which is of substantially the same diameter as the end 3 of the catch 1. As is clearly apparent in Fig. 3, a catch 1 is passed through the hole 14, so that the end 3 extends into the interior of the frame. On this end, there is disposed a nut 15 for fixing the catch 1 in the frame 4 with the bent, flat iron end extending in over the edge of the glass pane 5, with the cellular rubber coating A turned to face the edge of the panes 5, 6 and 7. In the strip 11, there is provided a recess 16 for the bent end of the catch 1. A cap 17 of plastics or similar material may suitably be disposed on the nut 15. The provision of one catch 1 at each one of two opposing edges of a window pane unit will effectively prevent the unauthorised re- moval thereof from the frame 4. For an added improvement of the bur¬ glary-protection contemplated in the present invention, further cat¬ ches 1 may be provided about the window pane unit. The nut 15 should preferably be tightened by hand, any excess threading being clipped off before application of the cap 17. While a catch of metal has been described in the foregoing, there is, naturally, nothing to prevent the catch from being manu¬ factured from some other material of suitable strength properties.

Claims: WHAT I CLAIM AND DESIRE TO SECURE BT LETTERS PATENT IS: 1. A device in window casements, in particular window casements in which one or more glass panes (5-7) are fixedly retained in a frame (4, 12) by means of an exteriorly-placed strip (11), for im¬ pairing and, if possible, preventing unauthorised removal of the glass panes (5-7) from the frame (4, 12), characterised in that there is disposed, at at least two opposing edges of the glass pane or panes (5-7), a catch (1) which grasps about the edge of the glass pane (5), extends through the frame (4) and is fixed (15) on the in¬ side of the frame (4). 2. The device as claimed in claim 1, characterised in that the end (3) of the catch (1) terminates in the interior of the frame (4), is threaded, and is fixed by means of a nut (15). 3. The device as claimed in claim 1 or 2, characterised in that the catch (1) is manufactured of a flat iron (2) whose short end is bent at approximately 90° or more, and whose other end is welded onto a round rod (3) with a threaded end for engagement with a nut (15). 4. The device as claimed in claims 1 to 3, characterised in that recesses (16) for the bent flat iron end are provided in the strip (11) for retaining the glass pane or panes (5-7) in the frame (4). 5. The device as claimed in any one of the preceding claims, characterised in that the frame (4) is intended for mounting of a triple-glazed window (5-7), the catch (1) extending between the frame (4) and the edge of the sandwiched window panes (5-7) provided with interjacent sealing strips (8, 9), and the bent end grasping about the edge of the outermost window pane (5), while the threaded end (3) of the catch (1) extends through a hole in the frame (4) for fixing by means of a nut (15).

Inventors: BLIXT AOKE, BLIXT, AOKE
Applicants: BLIXT AOKE, BLIXT, AOKE
Application year: 1986
Main classification: E06B3
IPC codes: E06B3, E06B5