IL115840A - Adjustable casement window - Google Patents

Description

Adjustable casement window ARPAL ALUMINIUM LTD 0"J>a tn J*»1bN 0*1N C.99259 FIELD OF THE INVENTION The present invention is in the field of casement windows and more specifically it is concerned with an adjustable framework for rectangular casement windows.

BACKGROUND OF THE INVENTION The term "casement window" as used herein denotes a rectangular framework consisting of an outer frame anchored within an opening in a wall and a jamb frame mounted within said outer frame, with a window sash swingably mounted thereon.

Casement windows of this type typically consist of a jamb frame directly anchored within the opening in the wall or, in other designs, an outer frame anchored within the opening in the wall, with a jamb frame fixed within said outer frame.

Heretofore casement windows comprise regulation means suitable only for adjusting the window's orientation in the plane of the window's pane. Nof suitable means are provided for adjusting a window in a direction perpendicular to the window's pane. Such adjustment is important for balancing the window and obtaining good sealing, in particular for blast resistant casement windows.

Where a framework is to be used with a blast resistant casement window which is designed to resist blasts caused, for example, by an explosion, it may remain firmly anchored to the wall, and the window pane itself may be blast resistant. However, in most cases, the result of a blast will be only a slight deformation of the jamb frame (presuming, of course, the window sash is properly secured within the jamb frame).

This situation is particularly undesired in those cases where the window must remain effectively sealed to prevent entry of noxious gases. Heretofore casement windows do not comprise suitable means for readjusting the orientation of the jamb frame, for ensuring effective sealing thereof after deformation caused, for example, by an explosion.

It is thus the object of the present invention to provide a framework for a casement window of the kind specified, with the provision of means for improved adjusting the orientation of casement windows.

SUMMARY OF THE INVENTION In accordance with the present invention there is provided a framework for a rectangular casement window, comprising: an outer frame anchored within a corresponding rectangular aperture formed in a wall; a jamb frame mounted within said outer frame and consisting of a shutting jamb, a hanging jamb, an upper frame head and a lower frame sill; a window sash holding a window pane, pivotally hinged at a hanging stile thereof with respect to said hanging jamb; at least one horizontal and at least one vertical jamb member having integrally or articulately coupled a lateral projection with an inwardly facing wall; a latch articulated to said outer frame opposite each corresponding respective juxtaposed lateral projection, each latch comprising an adjustable engaging member bearing against said inward facing wall and adapted for displacement in a direction essentially perpendicular to said inward facing wall, whereby axial displacement of said engaging member brings about displacement of the jamb frame and said associated window sash in a direction essentially perpendicular to said pane.

In a preferred embodiment of the present invention, said inwardly facing wall is rearwardly slanted, whereby axial displacement of said engaging member brings about mutually orthogonal displacement of the jamb frame and the associated window, as well as in said perpendicular direction.

According to one embodiment of the present invention each said lateral projection is formed along its longitudinal edges with elongated flanges which are respectively and slidably received within corresponding slots formed integrally with top and bottom rails and shutting and hanging stiles of said window sash. Alternatively, said lateral projections are coupled to the window sash members by a dovetail engaging arrangement.

In accordance with the invention, each latch is formed along its longitudinal edges with elongated flanges which are respectively and slidably received within corresponding slots integrally or articulately coupled to said outer frame, wherein said latches are coupled to the outer frame via receiving slots which form part of a carrier member secured to the outer frame. Alternatively said latches are coupled to outer frame portions by a dovetail engaging arrangement.

In different applications of the present invention said lateral projections of said jamb frame members as well as said latches attached to said outer frame, may be continuous or intermittent along a respective framework member.

According to a preferred embodiment of the present invention said adjustable engaging member is a bolt, preferably having a flat point.

In still a preferred embodiment of the present invention, the framework comprises at least two lateral projections on said at least one horizontal and at least one vertical jamb member, whereby axial displace-ment of said engaging member brings about tilting of said window frame in one or more perpendicular axes.

In any of the applications of the present invention, said outer frame and said jamb frame are formed with sealing means along their adjacent edges for prevention of egress or ingress of air, noxious gases, dust or liquid.

Where it is required to balance the framework after installing for obtaining ideal sealing and balancing of the window, or when it is required to maintain air-tight sealing of the framework after a blast in which the frame may have become slightly distorted, this can be readily effective by axial displacement of the engaging member.

BRIEF DESCRIPTION OF THE DRAWINGS For better understanding, the invention will now be described, by way of example only, with reference to the accompanying drawings, in which: Fig. 1 is a front elevation, partially sectioned, of a casement window according to the present invention; Fig. 2 is a horizontal cross-sectional view taken along line II— II in the window shown in Fig. 1; Fig. 3 is a vertical cross-sectional view taken along line III— III in Fig. 1 of the drawings; and Figs. 4(a) and 4(b) are the same as Fig. 3, illustrating the position of the framework members at minimal and maximal displacement of the engagement member respectively.

DETAILED DESCRIPTION OF A SPECIFIC EMBODIMENT Reference is first made to Figs. 1 to 3 of the drawings, which illustrate a rectangular framework 2 for a window pane 4 mounted within an opening in a wall 6. The framework comprises an outer frame 8 typically made of steel and anchored within a corresponding rectangular aperture formed in the wall 6 by a portion 11 cast within the wall and by other suitable anchors (not shown), as known per se.

A jamb frame 12 is mounted within the outer frame 8 and it consists of an upper frame head 14, a lower frame sill 16, a side shutting jamb 18 and a side hanging jamb 20.

The framework 2 further comprises a window sash 22 which consists of a profiled top rail 24, a bottom rail 26, a shutting stile 28 and a hanging stile 30. The window sash 22 is pivotally mounted with respect to the jamb frame 12 by means of hinges 32, secured respectively to the hinging jamb 20 and the hinging stile 30. The jamb frame 12 and the window sash 22 are typically made of a light metal such as aluminum.

As seen in Figs. 2 and 3 of the drawings, the profiles of the vertical sash members, 28 and 30 and the members of the horizontal sash members, 24 and 26 are respectively formed with inwardly directed pairs of reinforcing flanges 34 and 36 designed to receive the end portion of the window pane 4, with suitable seals 38 and 40 for preventing egress or ingress of air, noxious gases, dust and water. The window sash 22 is lockable within the jamb frame 12 by means of a rotary handle 42 mounted on the shutting stile 28, activating a locking mechanism as known per se, the constituent parts of which being generally and collectively designated in the figures as 44 (seen only in Figs 3 and 4).

The profiled members 24, 26, 28 and 30 of the window sash 22, each comprise a lateral projection 48 with a rearwardly slanted inward facing wall 50 (seen in Figs. 2 and 3, illustrating only the shutting stile 30 and the bottom rail 26, respectively).

A carrier member 52 is secured by bolts 53 to the outer frame 8, the carrier member being performed with elongated slots 54, adapted to receive corresponding flanges 56 formed integrally at the longitudinal edges of latches 58 having a rearwardly facing wall 60 opposite and substantially parallel with the slanted wall 50. A flat point socket-type set screw 62 extends through the latch 58, with its flat point bearing against the slanted wall 50 and being axially displaceable so as to increase or decrease the force applied thereby on the slanted wall 50.

A seal 64 is provided between the outer frame 8 and the jamb frame 12 so as to effectively seal the window. A decorative panel 66 snapingly engages the jamb frame 12 at 68 with a seal 70 sealing the gap between the wall 6 and the decorative panel 66.

It should be readily understood that the lateral projection 48 may be coupled to the jamb frame 12 in the same manner as the latch 58 being coupled to the outer frame 8. Furthermore, other coupling arrangements may be used, e.g., a dovetail arrangement, as known per se. It should also be understood, that the lateral projections and the latches may be continuous or intermittent, providing that lateral projections are provided opposite corresponding respective latch portions.

Attention is now directed to Figs. 4(a) and 4(b) illustrating the effect of axial displacement of the set screw 62 (which in Fig. 3 is shown in a middle position). In Fig. 4(a), the point of the set screw 62 is retracted such that the slanted wall 50 bears directly against the wall 60 of the latch 58, with minimal force applied and the seal 64 being extended so as to seal the gap between the wall 6 and the jamb frame 12. Simultaneously, the jamb frame 12 with the mounted window sash is allowed to slightly move laterally, e.g. towards the wall and inwardly (in the direction of the room).

In Fig. 4(b) the set screw 62 is screwed so as to maximally project from the rear wall 60, applying maximum force on the slanted wall 50, which in turn compresses the seal 64 and simultaneously causes displacement of the jamb frame 12 with the mounted window sash in a direction away from the wall (i.e. in a right direction) and outwardly (in the direction out from the room).

It should be understood that while axial displacement of the set screws brings about displacement of the jamb frame in two orthogonal directions (one in the plane of the window pane and the other in a plane perpendicular thereto, i.e. inwardly or outwardly), it is also possible to tilt the jamb frame by fastening selective set screws as may be the case.

The rectangular framework described hereinabove may be suitable for use as a blast resistant framework with effective sealing means preventing egress or ingress of noxious gases. However, when such a framework is intended for use as a blast resistant window, the slanted walls 50 and the latches 58 should be sufficiently long and appropriately reinforced so as to undertake possible blast impacts and pressure, as required by different specifications and as known per se.

While the description and the drawings refer to an embodiment in which the lateral projection 48 is rearwardly slanted opposite an essentially parallel facing wall 60, it should be obvious to a skilled person that the walls 50 and 60 may be essentially parallel with the window's pane.

The casement framework in accordance with the present invention is readily suitable for installation in an existing opening in a wall when it is required to replace a conventional casement framework to a blast resistant framework.

Claims (11)

CLAIMS:

1. A framework for a rectangular casement window, comprising: an outer frame anchored within a corresponding rectangular aperture formed in a wall; a jamb frame mounted within said outer frame and consisting of a shutting jamb, a hanging jamb, an upper frame head and a lower frame sill; a window sash holding a window pane, pivotally hinged at a hanging stile thereof with respect to said hanging jamb; at least one horizontal and at least one vertical jamb member having integrally or articulately coupled a lateral projection with an inwardly facing wall; a latch articulated to said outer frame opposite each corresponding respective juxtaposed lateral projection, each latch comprising an adjustable engaging member bearing against said inwardly facing wall and adapted for displacement in a direction essentially perpendicular to said inwardly facing wall, whereby axial displacement of said engaging member brings about displacement of the jamb frame and said associated window sash in a direction essentially perpendicular to the window pane.

2. A framework for a rectangular casement window according to claim 1, wherein said inwardly facing wall is rearwardly slanted, whereby axial displacement of said engaging member brings about also mutual orthogonal displacement.

3. A framework for a rectangular casement window according to claim 1, wherein each said lateral projection is formed along its longitudinal edges with elongated slots which are respectively and slidably received within corresponding flanges formed integrally with top and bottom rails and shutting and hanging stiles of said window sash.

4. A framework for a rectangular casement window according to claim 1, wherein each latch is formed along its longitudinal edges with elongated slots which are respectively and slidably received within corresponding flanges integrally or articulately coupled to said outer frame.

5. A framework for a rectangular casement window according to claim 4, wherein said latches are coupled to the outer frame via receiving flanges which form part of a carrier member secured to the outer frame.

6. A framework for a rectangular casement window according to claim 1, wherein said lateral projections are coupled to the window sash members by a dovetail engaging arrangement.

7. A framework for a rectangular casement window according to claim 1, wherein said latches are coupled to outer frame portions by a dovetail engaging arrangement.

8. A framework for a rectangular casement window according to claim 1, wherein said lateral projections of said jamb frame members as well as said latches attached to said outer frame, may be continuous or intermittent along a respective framework member.

9. A framework for a rectangular casement window according to claim 1, wherein said adjustable engaging member is a bolt.

10. A framework for a rectangular casement window according to claim 1, comprising at least two lateral projections on said at least one horizontal and at least one vertical jamb member, whereby axial displacement of said engaging member brings about tilting of said window frame in one or more perpendicular axes.

11. A framework for a rectangular casement window according to claim 1, wherein said outer frame and said jamb frame are formed with sealing means along their adjacent edges for prevention of egress or ingress of air, noxious gases, dust or liquid. For the Applicants, 9 2S9-4-SPC-DD be/1.11.1995