This invention _. relates to an insulating window for sound and - heat insulation and constituting an additional inner window ^* to be positioned in or outside a reveal of an existing windo

Insulating windows for the aforesaid purpose are known pre ¬ iously.All such known constructions have in common, that they are complicated and, therefore, expensive. The frame proper at these windows consists of several sections with square profile or the like, which are mounted in the reveal. This mounting is time-consuming and complicated, because jointing pieces and expansion means must be arranged so as to co-oper¬ ate with the square profile sections in order to adapt to the reveal of the window. Sealing strips, furthermore, must be placed between the profile and the reveal. According to known constructions, the pane proper is attached on hinges inside the frame where the pane is enclosed in a casement, which is located about the edge of the pane, and to which said hinges are attached. Said casement is relatively strong as it is intended to carry the window.

Constructions of this kind, therefore, are complicated alread when single-sashed windows are concerned. At a double-sashed window, i.e. a window comprising one left-hand hung pane and one right-hand hung pane, additional complications arise, as sealing is to be effected along the free vertical edges, which in closed position of the window meet and are located close to each other.

The present invention relates to an insulating pane where the frame is very cheap and simple and easy to mount in any opt¬ ional reveal, and where the pane proper by means of a simple edge strip is intended to seal against a sealing strip prov¬ ided on the frame. The simple design of the edge strip is rendered possible in that the pane proper is made of hardened glass or plexiglass and thereby is self-supporting. No carry¬ ing casement, therefore, is required. Due a.o. to a hang arr-

angement comprised in the invention, insulating windows of substantial size can be used. The invention also comprises a very simple arrangement for sealin .between double-sashed windows at their free vertical edge.

The invention, thus, relates to an insulating window for hea and sound insulation, which window is intended to ^* be positio ed preferably in a reveal inside of existing panes and compr es a frame, with which a pane is intended to co-operate.

The invention is characterized, in that said frame consists a strip, preferably of wood, which on its inward facing side surface is provided with a sealing strip of rubber or the like, that said pane consists of a pane of hardened glass or plexiglass, the edges of which along substantially their ent length are enclosed by a non-carrying edge strip of U-shaped cross-section, which edge strip is intended to seal against said sealing strip, that the pane at one vertical edge, part at its lower and parti* at its upper edge, is supported by a fastening member provided to enclose the pane at the corne where each fastening member is attached, preferably glued, to the pane whereby the pane is self-supporting, and that said fastening member is a portion of a hinge, so that the pane is pivotal to and from said frame.

The invention is described in greater detail in the followin with reference to the accompanying drawings, in which Fig. 1 is a schematic view of a vertical section through a reveal with an insulating window according to the invention, Fig. 2 is a view of an insulating window according to the in¬ vention seen from the room, into which the reveal opens, Fig. 3 is a section along A-A in Fig. 2,

Fig. t is a schematic view of an insulating window according to the invention, at which the pane is divided into a left- -hand and a right-hand portion, and Fig, 5 is a portion of a section along B-B in Fig. 4.

In Fig. 1, the numeral 1 designates the wall at the reveal o an existing window, and 2 designates a frame for an existing

window with double panes 3,4.

Inside of the existing window 2,3,4, seen from a room 5 or t like, ^' into which the reveal opens, an insulating window, an additional inner window, according to the invention is lo ated.

The insulating window according to the invention comprises a frame 6 mounted in the reveal, with which frame 6 a window p 7 is intended to co-operate. Said frame 6 consists of a strip 6, preferably of wood, which on its side surface 8 facing in¬ ward to said room is provided with a sealing strip 9 of rubbe or the like of known type.

The pane 7 consists of a pane 7 of preferably hardened glass or plexiglass, the edges 10 of which along substantially thei entire length are enclosed by a simple non-carrying edge stri 11 of preferably U-shaped cross-section, where said edge stri 11 is intended to seal against said sealing strip 9 when the insulating pane is in closed position, as shown in Fig. 1.

The pane.7 also comprises at one vertical edge 14 at each of its lower corner 12 and, respectively, upper corner 13 a fast ening member 15 and, respectively, 16 to support and enclose the pane 7 at the corner, where each fastening member 15,16 is attached, preferably glued, to the pane at the respective corner 12,13.

The pane 7 is pivotally hung on hinges at least at said lower corner 12 and upper corner 13, where each fastening member 15 16 comprises a sleeve 19 and, respectively, 20 or the like, which are located at the vertical edge 17 and, respectively, 18 of the fastening member 15,16 and intended to constitute a portion 19,20 of said hinges, and where a second portion 21 and, respectively, 22 of said hinges are ^' located on the frame 6 or on the wall 1 in the reveal. The pane 7 in this way can be pivoted to and from the frame 6.

According to one embodiment, which is preferred at insulating windows of greater size, the pane 7 comprises between said

lower corner 12 and said upper corner 13 at least one support ing member 23 with preferably U-shaped cross-section which en closes the edge 10 of the pane. The supporting member 23 is attached by means of a bolt 24 or the like extending through holes in the supporting member 23 and pane 7. The supporting member 23 also comprises a sleeve 25 or the like intended to constitute a portion 25 of a hinge for hanging the pane, wher a second portion 26 of said hinge is located on said frame 6 or on the wall 1 in the reveal.

It is, of course, possible to provide several- supporting memb ers 23 at the pane, and the supporting member 23 can be attac ed by a suitable glue instead of by holes and a bolt 24.

For pressing the pane 7 against the said frame 6 and said sealing strip 9 in closed position of the insulating window, one or several simple locking devices are provided which com¬ prise, for example, a knob 27 with a locking arm 28 intended to clamp in known manner on a hook 29. Said knob 27 and arm 2 are located, for example, on the edge strip 11 of the pane 7, and the hook 29 is located on the frame 6 or wall 1.

At another embodiment of an insulating window according to th invention, the pane is divided into two portions, a fi st, 5ι ^» ight-hand hung portion 30 and a second, left-hand hung porti 31.

One of said portions, for example said right-hand hung portio 30, is provided along its free vertical edge 32 facing to the second one 31 of said portions 30,31 with an edge strip 11 of the kind mentioned above, which is completed with a projectin flange 33 extending in parallel with but slightly offset in relation to the plane 34 of the pane 7. Said flange, thus, is located on one side 35 of the pane 7, preferably on the side 35 remote from said room 5. The flange 33 is intended to seal against a sealing strip 36 located at the edge strip 11 on th corresponding free edge 37 of the second one 31 of said port¬ ions 30,31 and on the same side 35 as said flange 33. Said la

mentioned edge strip 11 is provided with a corresponding flange 38 located on the other side ^' 39 of the pane 7 and in¬ tended to cover ^' an intermediate space between said two free " edges 32,37.

In a through hole 41 in the pane 7 at said second portion 31 a locking device is located, which comprises a locking arm 42 intended in locking position, Fig. 5, to abut the flange 33 of said first ^' portion 30 and thereby to press said portion ag ainst the sealing strip 36. The locking arm 42 is intended to be operated by a handle 43, preferably located on the other side of the pane 7, in relation to the arm 42, and connected to the arm 42 by an axle 44.

The mode of operation of the insulating window according to the invention should substantially have become apparent from the above description. When the window is being mounted, the frame 6 with the strip 9 is attached in the reveal. The hinge parts 21,22,26 and the hooks 29 are mounted. Thereafter the pane proper with the fastening and supporting members can be positioned and mounted by hinge cotters (not shown). When the pane has been positioned in this way, the pane rests a.o. in the lower fastening member 15, which is important in the case of thick panes, which may have a considerable weight. The vertical alignment of the pane is maintained a.o. by the uppe fastening member 16 and the supporting member 23.

A characterizing feature is that the pane is self-supporting, and for this purpose the pane is made of hardened glass or plexiglass. Therefore, no carrying casement is required, and the structure, thus, is simplified substantially.

An insulating window according to the invention, thus, offers the possibility of mounting an additional inner window for heat and sound insulation in a simple and relatively cheap way. The window can also simply be adapted to many various types of reveals. By using a frame 6 with parallelepipedic cross-section, the window also can be adapted to a reveal where the walls 1 form an angle other 90° with the plane of the pane 7.

The insulating window according to the invention, due to the absence of a carrying casement, is also relatively discrete, by having a.o. a very narrow "jointing zone" between the two ^" panes 30,31 at the embodiment, at which the pane 7 is divided into two portions.

It is, of course, possible to imagine a plurality of changes of the insulating window according to the invention, without therefore abandoning the invention idea.

A sealing strip, for example, can be inserted between the frame 6 and wall 1 in order to additionally improve the insul ation.

At the pane 7 divided into two portions 30,31 a sealing strip can be provided to co-operate with the flange 38 in a manner corresponding to the manner, in which the strip 36 co-operate with the flange 33.

An insulating window according to the invention can also be positioned against an inner wall 45, Fig. 1, at an existing window, in which case said frame 6 with sealing strip 9, or only said sealing strip, is placed at the inner wall about an existing window opening,and said hinge is ^' placed on the frame 6 or inner wall.

As regards the choice of material, said fastening members and support members preferably are made of aluminium, steel or brass, and the edge strip 11 preferably consists of thin sheet metal steel.

An embodiment of an insulating window according to the invent also can be imagined to have no edge strip 11* but the pane 7 seals directly against the sealing strip 9. The pane 7 is her held in closed position by, for example, a knob and an arm attached to the ^' frame 6 or wall 1 or to the inner wall 45.

The invention must not be regarded restricted to the above em bodiments, but can be varied within the scope of the attached claims.