GB2480514A

GB2480514A - Secondary glazing assembly

Info

Publication number: GB2480514A
Application number: GB201021738A
Authority: GB
Inventors: Adam Dudley
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-05-19
Filing date: 2010-12-22
Publication date: 2011-11-23
Anticipated expiration: 2030-12-22
Also published as: GB2480514B; GB201008352D0; GB2480466A; GB201021738D0

Abstract

A secondary glazing assembly 60a for installation on an inner side of a primary glazing assembly 50a, and configured to allow inwards movement or inwards opening of at least part of an inner sash 15a of the primary glazing assembly 50a. The secondary glazing assembly 60a comprises a secondary mounting frame 12a comprising a stopping member 13a for abutting the sash 61a of the secondary glazing assembly 60a in a closed configuration. At least a portion of the stopping member 13a is removably attachable to the secondary mounting frame 12a and/or to the primary case 7a so as to allow inwards movement or inwards opening of the inner sash 15a. An extendable hinge 100f connecting the inner sash 15f and the batten rod 14f is configured to extend at least partially away from the batten rod 14f and the primary case 7a upon inwards opening or inwards movement of the inner sash 15f.

Description

SECONDARY GLAZING ASSEMBLY

FIELD OF INVENTION

The present invention relates generally to a glazing assembly, and more specifically to a secondary glazing assembly. The invention particularly, though not exclusively, relates to a secondary glazing assembly for use with sash and case windows such as traditional timber sash and case windows. The invention also relates to a method of installing a secondary glazing assembly for use with a primary glazing unit, and in particular, though not exclusively, to a method of installing a secondary glazing assembly in association with, near, adjacent or abutting a traditional timber sash and case window.

BACKGROUND OF INVENTION

Approximately 20% of the current total housing stock in the UK is made up by pre-1920's buildings. A large number of these properties have traditional timber sash and case windows. Timber sash and case windows are also very common in other pre- 1920's building types. With the current government targets for reducing carbon emissions by 42% by 2020, and by 80% by 2050, reduction of heat loss in traditional buildings and properties has become a major objective. As a result, owner and/or occupiers of pre-1920's properties with traditional timber sash and case windows are becoming increasingly aware of the heat loss through their windows.

Various methods for improving the thermal efficiency have been developed, including secondary glazing and double glazing. Some methods are better than others in terms of their performance. Secondary glazing achieves the highest reduction in heat loss of up 75%. In comparison, double glazing achieves around 55% reduction in heat loss.

Alternative measures in the market can be counter-productive, such as draft proofing around the window sashes, which simply removes the trickle ventilation' which is otherwise necessary for the benefit of the building fabric (as required under the current building regulations).

One deficiency with current measures to improve thermal efficiency of timber sash and case windows is that these methods do not address the issue of reducing heat loss through the building fabric adjacent the window, and more specifically to the parts near, around or adjacent the window which are most inefficient in terms of their thermal resistivity, such as the window backs, elbows, reveals, and soff it.

Another deficiency with conventional secondary glazing, whether manufactured with timber frames or with extruded/cast sections, such as aluminium, steel, or uPVC, is that such regularly interfere with the operation of specific features of the primary window. In addition to this, secondary glazing is often unsightly and incongruous with the traditional detailing, particularly where windows have shuttered or panelled reveals.

Traditional timber sash and case windows typically comprise a lower sash and an upper sash, which are vertically slidable relative to each other within a sash case.

The upper sash is typically provided within an outer recess of the sash case, and may be either permanently fixed, or may be slidable relative to the sash case. The lower sash is typically provided within an inner recess of the sash case, and is typically slidable relative to the sash case. The inner recess is typically formed between a longitudinally and vertically extending ridge which separates the inner and outer recesses, and a batten rod provided vertically along an inner length of the sash case to maintain the lower sash in position within the inner recess. When cleaning of an outside face of the lower sash is required, the batten rod can be removed to allow the lower sash to swing inwards for cleaning.

When secondary glazing is fitted against or near the inner side of a traditional sash and case window, the frame of the secondary glazing unit typically prevents either removal of the batten rod, or movement of the lower sash inwards. This prevents the lower sash from being moved inwards, e.g. swung or hinged inwards, thus preventing access to the outside face of the lower sash from an inside of a building, e.g. for cleaning purposes.

This is generally the case regardless of whether the window reveals are traditional plaster on timber lathe or modern plasterboard on timber framing, plated with tongue and groove lining boards, or are adorned with timber panels or shutters. In most instances, the plane of the finish to the window reveals meets the face of the window case close to the inner corner, immediately adjacent to the batten rod. As a result, there is generally insufficient clearance between the batten rods and the face of the reveal where such meets the window case for accommodating the frame of the secondary glazing without causing fouling of the operation of the window. Where shutters are present the frame of the secondary glazing has to be fixed to the face of the shutters, immediately rendering the shutters inoperative. Moreover, where Listed interiors of historic buildings are involved, this ad hoc / plant-on approach is potentially ruinous to the integrity and aesthetics of the original detailing.

A number of systems have been developed whereby the entire secondary glazing can be removed, e.g. by way of releasing mechanical or magnetic catches.

However, operation of such systems can be cumbersome, if not potentially hazardous, particularly where large windows are involved.

It is an object of at least one embodiment of at least one aspect of the present invention to obviate or at least mitigate at least one or more problems in the prior art.

It is an object of at least one embodiment of at least one aspect of the present invention to seek to reduce a visual impact of secondary glazing assemblies on traditional sash and case windows.

It is an object of at least one embodiment of at least one aspect of the present invention to seek to improve ventilation, e.g. ventilation control, of secondary glazing assemblies, e.g. in association with, near, adjacent or abutting a primary glazing assembly.

It is an object of at least one embodiment of at least one aspect of the present invention to provide a secondary glazing assembly having a sash, casement or glass pane of similar size to a primary glazing assembly associated therewith.

It is an object of at least one embodiment of at least one aspect of the present invention to provide a secondary glazing assembly configured to allow inwards movement and/or inwards opening of at least part of a primary glazing assembly, e.g. a traditional sash and case window.

It is an object of at least one embodiment of at least one aspect of the present invention to provide a method of installing an improved secondary glazing assembly.

SUMMARY OF INVENTION

According to a first aspect of the present invention there is provided a secondary glazing assembly for installation in association with, near, adjacent or abutting a primary glazing assembly, wherein the secondary glazing assembly is configured to allow inwards movement or inwards opening of at least part of the primary glazing assembly.

Preferably, the secondary glazing assembly is configured for installation in association with, near, adjacent or abutting an inner side of the primary glazing assembly.

An inner side will be herein understood to refer to a side facing towards an inside or interior part of a building. Similarly, the term inwards' will be understood to refer to a direction towards an interior or inside part of a building.

In contrast, an outer side will be herein understood to refer to a side facing towards an exterior or outside part of a building. Similarly, the term outwards' will be understood to refer to a direction towards an exterior or outside part of a building.

The primary glazing assembly may comprise a window, and typically and advantageously may comprise a sash and case window, such as a traditional timber sash and case window.

The primary glazing assembly may comprise at least one inner sash and/or at least one outer sash, preferably one inner sash and one outer sash.

Typically, the at least one inner sash may comprise a lower sash, and the at least one outer sash may comprise an upper sash.

The inner sash and the outer sash may be movable, e.g. slidable relative to each other, and typically substantially vertically slidable relative to each other.

The primary glazing assembly may further comprise a primary case.

Typically, the outer sash may be provided within an outer groove of the primary case. By such provision the outer sash, e.g. the upper sash, may be slidable within the outer groove.

Alternatively, the outer sash may be stationary relative to the primary case.

Typically, the inner sash may be provided within an inner groove of the primary case. By such provision, the inner sash, e.g. the lower sash, may be slidable within the inner groove.

Typically, the primary glazing assembly may comprise a primary inner member or "batten rod" to maintain the inner sash in position within the inner groove.

The primary inner member may extend, e.g. substantially vertically, at least partially along a height of the primary glazing assembly, e.g. at least heightwise along a lower sash (e.g. when closed). Typically, the primary inner member may extend along substantially a whole height of the primary glazing assembly, e.g. of the primary case.

The primary inner member may be provided near or against an inner portion of the primary case, and/or may form part of the inner groove thereof.

Advantageously at least part of the primary inner member may be removable, e.g. at least part of the primary inner member extending heightwise along a lower sash (e.g. when closed). By such provision, when cleaning of the outside face of the inner sash is required, the primary inner member may be removed to allow the inner sash to be removed from the inner groove, e.g. by swinging the lower sash inwards, e.g. for cleaning thereof. Conveniently, the whole of the primary inner member may be removable.

The primary glazing assembly may be provided with hinge means, e.g. hinges, which may be provided, e.g. on the inner sash and/or on the primary case or primary inner member.

The hinge means may comprise one or more attachment members, e.g. lugs, bolts or screws, which may be provided on the inner sash, and one or more hinges, e.g. "easy-clean" hinges such as simplex-type hinges which may be provided on the primary case or on the primary inner member.

The primary glazing assembly and/or the secondary glazing assembly may be provided within a casing or lining, e.g. a window casing or lining, which substantially surrounds the primary glazing assembly and/or the secondary glazing assembly and/or which provides support for the primary case and/or for a mounting frame of the secondary glazing assembly.

The secondary glazing assembly may comprise a secondary mounting frame, and may further comprise a secondary sash or casement.

The secondary glazing assembly may comprise a casement window and/or a "tilt and turn" window.

Advantageously, the secondary glazing assembly may comprise a turning mechanism to allow the secondary sash to open, e.g. to swing along an arcuate path, e.g. relative to a substantially vertical axis.

Advantageously, the secondary glazing assembly may comprise a tilting mechanism to allow the secondary sash to open, e.g. to swing along an arcuate path, e.g. relative to a substantially horizontal axis.

Preferably, the secondary glazing assembly may comprise a "tilt and turn" mechanism comprising both a tilting mechanism and a turning mechanism.

By such provision controlled ventilation of an interior of a building may be improved, e.g. by providing a number of opening configurations of the secondary glazing assembly.

The secondary sash may comprise a glass unit, such as a single, double, or triple glazing unit. The secondary sash may further comprise a sash frame within which the glass unit may be provided.

The secondary sash, e.g. secondary sash frame and/or glass unit may be of a similar dimension, e.g. similar width and/or height, to the dimension of the primary glazing assembly, e.g. primary case, associated therewith. By such provision a visual impact of the secondary glazing assembly on the primary glazing assembly may be reduced.

The glass unit of the secondary sash may advantageously comprise a unitary glass unit, e.g. the glass unit may occupy the entire area within the secondary sash frame. By such provision a visual impact of the secondary glazing assembly on the primary glazing assembly may be further reduced.

Alternatively, the glass unit may comprise a plurality of discrete glass panes which may be separated, e.g. by one or more dividing members or glazing bars.

The secondary mounting frame may be configured to allow inward movement or inward opening of at least part of the primary glazing assembly, e.g. of the inner sash.

The secondary mounting frame may further comprise a stopping member for abutting the sash of the secondary glazing assembly in a closed configuration.

Preferably, at least a portion of the stopping member may be removably attachable to the secondary mounting frame and/or to the primary case, preferably to the secondary mounting frame.

The stopping member, e.g. the removable portion of the stopping member, may be attached, e.g. removably attached, to the secondary mounting frame, e.g. by fixing means.

Preferably, the fixing means may comprise concealed fixing means. By such provision the fixing means may be recessed or flush relative to the stopping member such that the fixing means may not interfere with the operation of the secondary sash, and such that the fixing means may be accessible to a user, e.g. from an inner side of the building and/or of the secondary glazing assembly.

The fixing means may comprise a mechanical fixing(s) such as screws, clip fittings and/or magnetic catches.

At least one, preferably all, of the mechanical fixings may be operated using a proprietary socket key. By such provision, safety and/or security may be increased.

The secondary mounting frame and/or the primary sash may comprise at least a portion or member for receiving or interacting with the fixing means, e.g. a thread hole, clip catch, or a magnetic member.

Preferably, the removable portion of the stopping member may extend substantially parallel to a side of the secondary mounting frame and/or of the primary case.

In one embodiment, the removable portion of the stopping member may extend substantially along the whole length of a side of the secondary mounting frame and/or of the primary case, e.g. a left, right, top or bottom side of the secondary mounting frame and/or of the primary case.

In another embodiment, the removable portion of the stopping member may extend along part of a length of the secondary mounting frame and/or the primary case.

Preferably, the removable portion of the stopping member may extend along the whole or part of a height, e.g. of the left and/or right side, of the secondary mounting frame and/or the primary case.

Preferably, the removable portion of the stopping member may extend along part of a height, e.g. of the left and/or right side, of the secondary mounting frame and/or the primary case equal to or greater than the height of the inner sash. By such provision, when the removable portion of the stopping member is detached, the lower sash may be removed from the inner groove, for example by swinging the lower sash inwards, e.g. by providing hinge means, e.g. hinges, on the inner sash and/or on the primary case.

Preferably, the removable portion of the stopping member may extend along a side of the secondary mounting frame opposite the side to which the secondary sash is attached.

Preferably, the removable portion of the stopping member may extend along a side of the secondary mounting frame near the side of the primary case to which the primary inner member or "batten rod" is attached.

The mounting frame may be configured be fitted at least partially within a recess of the window casing or lining. By such provision, at least part of the mounting frame may be substantially concealed and/or provided in a recessed fashion within or behind a casing or lining such that, in use, when the stopping member is detached, part of the mounting frame adjacent or near the primary inner member may not protrude beyond or forward of the primary case and/or beyond or forward of the primary inner member.

The secondary sash may be attached to the secondary mounting frame by attachment means, e.g. one or more hinges.

The one or more hinges may comprise concealed hinges to further reduce the visual impact of the secondary glazing assembly.

Advantageously, the attachment means may comprise a turning mechanism to allow the secondary sash to open, e.g. to swing along an arcuate path, e.g. relative to a substantially vertical axis.

Advantageously, the attachment means may comprise a tilting mechanism to allow the secondary sash to open, e.g. to swing along an arcuate path, e.g. relative to a substantially horizontal axis.

Preferably, the attachment means may comprise a "tilt and turn" mechanism.

The secondary glazing assembly may comprise at least one handle, typically one handle, for operating, e.g. opening and closing, the secondary sash.

Typically, the handle may be provided on the secondary sash frame.

Conveniently, the handle may operate a closing mechanism for closing and/or opening the secondary sash.

The secondary mounting frame may comprise a catching mechanism capable of interacting with the closing mechanism to allow a user to close/open the secondary sash by operating the handle.

Alternatively, the catching mechanism may be provided within or on the stopping member, e.g. within or on the removable portion of the stopping member.

The closing mechanism and/or catching mechanism may comprise window closure means, e.g. a plurality of bolts, e.g. provided on or within the secondary sash frame, which may engage with or within a plurality of recesses, holes or catches, e.g. provided on or within the secondary mounting frame.

Advantageously, the handle may be detachable, e.g. may be detachable from the secondary sash frame. By such provision, the visual impact of the secondary glazing assembly may be further reduced, and/or safety and/or security may be further increased. Further, where the window casing or lining comprises shutters, the shutters may be closed or folded, e.g. near or adjacent an inner face of the secondary glazing assembly, e.g. of the secondary sash, to allow use of at least some, preferably all, original features of the shutters.

The secondary glazing assembly may further comprise trickle ventilation means, e.g. a trickle ventilation member, which may be provided, e.g. on the secondary sash frame and/or on the secondary mounting frame.

Typically, the primary glazing assembly may be made from timber.

Typically, the secondary glazing assembly, e.g. the secondary mounting frame and/or the secondary sash frame, may be made from timber.

Alternatively, the secondary glazing assembly, e.g. the secondary mounting frame and/or the secondary sash frame, may be made from a non-timber material such a metal, e.g. aluminium or steel, or a polymer, e.g. uPVC.

The primary and/or secondary glazing assembly may comprise retention means, e.g. a catch, adapted for preventing or restricting movement of the inner sash beyond a predetermined opening configuration. By such provision, upon opening of the inner sash, the retention means, e.g. catch, prevents or restricts interfering or fouling of the inner sash with the secondary glazing assembly, e.g. secondary mounting frame and/or secondary sash, in an open position. Thus, risk of damage to the inner sash, to the hinge means thereof, and/or to the secondary glazing assembly, is minimised.

Alternatively, or additionally, the primary glazing assembly may comprise at least one extendable hinge means, e.g. at least one extendable hinge, which may connect, e.g. the inner sash, and a support surface, e.g. the primary case or primary inner member.

The at least one extendable hinge may be configured to extend at least partially away from the support surface upon inwards opening or inwards movement of the inner sash member. By such provision, upon inwards opening or inwards movement of the inner sash, the inner sash may be fully opened, advantageously to at least 45°, preferably at least 600, typically to approximately 90° relative to a closed configuration, without fouling, contacting, or interfering with the secondary glazing assembly, e.g. secondary mounting frame and/or secondary sash when in an open position.

The at least one extendable hinge may be configured to allow the inner sash to hinge and/or pivot at a distance, e.g. at a predetermined distance, from the support surface.

The at least one extendable hinge may comprise at least one first hinge member which may be configured for connection and/or attachment to/on the primary case or on the primary inner member.

The at least one first hinge member may comprise, e.g. holes for receiving and/or fixing the at least one first hinge member to the support surface, by fixing means such as bolts or screws.

The at least one extendable hinge may comprise at least one second hinge member which may be configured for connection and/or attachment to/on the inner sash.

Typically, the at least one second hinge member may comprise one or more receiving portions adapted to receive fixing means such as bolts or screws for connection and/or attachment to/on the inner sash.

The one or more receiving portions may comprise an elongate portion or opening adapted to receive the fixing means.

Advantageously, the at least one second hinge member may comprise a first or upper elongate receiving portion or opening extending from a first side, e.g. an upper side of the second hinge member, and a second or lower elongate receiving portion or opening extending from an opposite side, e.g. a lower side of the second hinge member.

The first or upper elongate receiving portion, and the second or lower elongate receiving portion, may be symmetrical. By such provision the at least one extendable hinge may be used on either side, .e.g. left or right side, of the inner sash.

The at least one extendable hinge may comprise at least one intermediate hinge member which may be connected by a pivotal connection, eg. by a pinned connection, to the at least one first hinge member and/or to the at least one second hinge member.

By such provision, the at least one extendable hinge may be configured to allow the inner sash to hinge and/or pivot at a distance, e.g. at a predetermined distance, from the support surface and/or from the first hinge member.

Typically, the at least one first hinge member, at least one second hinge member, and/or at least one intermediate hinge member may comprise one member.

The primary glazing assembly may comprise 1-5, typically 1-3, e.g. two extendable hinge means, which may connect or attach one side of the inner sash, e.g. the left or right side, to a support surface, e.g. the left or right side of the primary case or on the left or right side primary inner member.

In one embodiment, the at least one extendable hinge may comprise a first intermediate hinge member which may be pivotally connected by a pivotal connection, e.g. by a pinned connection, to the first hinge member.

The first intermediate hinge member may be connected by a pivotal connection, e.g. by a pinned connection, to the second hinge member.

Alternatively, the first intermediate hinge member may be connected by a pivotal connection, e.g. by a pinned connection, to a second intermediate hinge member The second intermediate hinge member may be connected by a pivotal connection, e.g. by a pinned connection, to the second hinge member.

Alternatively, the at least one extendable hinge may comprise additional intermediate hinge members, depending on the extension distance required.

In a stowed configuration, the first hinge member, at least one intermediate member, and second hinge member may be substantially abutting and/or may be in close proximity to each other and/or to the support surface.

In a deployed configuration, the first hinge member, at least one intermediate member, and/or second hinge member may extend at least partially away from the support surface upon inwards opening or inwards movement of the inner sash member.

In an alternative embodiment, the at least one extendable hinge may comprise a first intermediate hinge member which may be connected to the first hinge member by at least one first pivotal connection, e.g. pinned connection.

The first intermediate hinge member may be pivotally connected to the second hinge member by at least one second pivotal connection, e.g. pinned connection.

The at least one extendable hinge may comprise a second intermediate hinge member which may be pivotally connected to the first hinge member by at least one third pivotal connection, e.g. pinned connection.

The second intermediate hinge member may be pivotally connected to the second hinge member by at least one fourth pivotal connection, e.g. pinned connection.

Advantageously, the at least one first pivotal connection and the at least one fourth pivotal may be aligned and/or may shared a common axis, e.g. a common axis of rotation in a stowed configuration.

Advantageously also, the at least one second pivotal connection and the at least one third pivotal connection may be aligned and/or may shared a common axis, e.g. a common axis of rotation in a stowed configuration.

In one embodiment, the at least one first pivotal connection may comprise two first pivotal connections, the at least one second pivotal connection may comprise two second pivotal connections, the at least one third pivotal connection may comprise one third pivotal connection, and the at least one fourth pivotal connection may comprise one fourth pivotal connection.

Alternatively, the at least one first pivotal connection, at least one second pivotal connection, at least one third pivotal connection, and/or at least one first pivotal connection may comprise one to five, typically one to three, preferably one or two pivotal connections, e.g. pinned connections.

In use, the second hinge member may be moved near, against or adjacent the inner sash, e.g. for attachment purposes, by pivoting the first intermediate hinge member relative to the first hinge member around the at least one first pivotal connection, and by pivoting the second hinge member relative to the second intermediate hinge member around the at least one fourth pivotal connection.

In use, opening of the inner sash may be permitted by pivoting the second hinge member relative to the first intermediate hinge member around the at least one second pivotal connection, and by pivoting the second intermediate hinge member relative to the first hinge member around the at least one third pivotal connection.

By such provision, upon inwards opening or inwards movement of the inner sash member, the inner sash member may be fully opened, advantageously to at least 45°, preferably at least 60°, typically to approximately 90° relative to a closed configuration, without fouling, contacting, or interfering with the secondary glazing assembly, e.g. secondary mounting frame and/or secondary sash, when the secondary glazing assembly is in an open position.

According to a second aspect of the present invention there is provided a stopping member for use in a secondary glazing assembly according to the first aspect of the invention.

The stopping member may abut the secondary sash, e.g. the secondary sash frame, in a closed configuration.

Preferably, the removable portion of the stopping member may extend along part of a height, e.g. of the left and/or right side, of the secondary mounting frame and/or the primary case substantially equal to or greater than the height of the inner sash. By such provision, when the removable portion of the stopping member is detached (and the primary inner member is removed), the lower sash may be removed from the inner groove, for example by swinging the lower sash inwards, e.g. by providing hinge means, e.g. hinges, on the inner sash and/or on the primary case or primary inner member.

Preferably, the removable portion of the stopping member may extend along part of a height, e.g. of the left and/or right side, of the secondary mounting frame and/or the primary case substantially equal to or greater than the height of the inner sash. By such provision, when the removable portion of the stopping member is detached, the inner sash may be removed from the inner groove, for example by swinging the inner sash inwards, e.g. for cleaning thereof.

According to a third aspect of the present invention there is provided a hinge means such as an extendable hinge means, e.g. an extendable hinge, which may connect a first, e.g. openable member, e.g. the inner sash of a sash and case window, a door or the like, and a second member, e.g. fixed or support surface, e.g. the primary case or primary inner member of a sash and case window, a door frame or the like.

The hinge means may be configured to extend at least partially away from the support surface upon inwards opening or inwards movement of the first member. By such provision, upon inwards opening or inwards movement of the first member, the first member may be fully opened, advantageously to at least 45°, preferably at least 60°, typically to approximately 90° relative to a closed configuration, without fouling, contacting, or interfering with peripheral or adjacent parts, e.g. a secondary glazing assembly, e.g. secondary mounting frame and/or secondary sash thereof when in an open position.

The hinge means may be configured to allow the first member to hinge and/or pivot at a distance, e.g. at a predetermined distance, from the support surface.

The hinge means may allow the first member to be positioned adjacent the second member in a first disposition and to be positioned spaced from or distal the second member in a second disposition.

The hinge means may be adapted for use in a secondary glazing assembly according to the first aspect of the invention.

Preferred features of the hinge means/extendable hinge have already been described in connection with the first aspect, and are therefore not repeated here for brevity.

According to a fourth aspect of the present invention there is provided a window assembly comprising a secondary glazing assembly according to the first aspect of the invention.

The window assembly may further comprise a primary glazing assembly which may comprise a window, and typically may comprise a sash and case window such as a traditional timber sash and case window.

The primary glazing assembly may further comprise a primary case.

Alternatively, the outer sash may be stationary relative to the primary case.

Alternatively, the hinge means may comprise at least one extendable hinge according to the third aspect of the present invention.

The primary glazing assembly and/or the secondary glazing assembly may be provided within a casing or lining, e.g. a window casing or lining, which substantially surrounds the primary glazing assembly and/or the secondary glazing assembly and/or which provides support for the primary case and/or a secondary glazing assembly mounting frame.

The window casing or lining may comprise one or more window casing members or window lining members.

The one or more window casing members or window lining members may comprise architraves which may be provided on a innermost part of the window casing or lining, skirting such as skirting boards, side shutters or side panels which may extend inwards and may be provided on one or both sides of the primary glazing assembly, at least one lower panel or window back which may be provided below the primary glazing assembly, lower side panels or elbows which may be provided below the side shutters or side panels on one or both sides of the primary glazing assembly, at least part of a window cill which may be provided above the lower panel or window back and/or above one or more of the lower side panels or elbows, and/or at least one upper panel or soffit which may extend inwards and may be provided above the primary glazing assembly.

According to a fifith aspect of the present invention there is provided a building comprising a secondary glazing assembly according to the first aspect of the invention or a window assembly according to the fourth aspect of the invention.

According to a sixth aspect of the invention there is provided a method of installing a secondary glazing assembly, such as a secondary glazing assembly according to a first aspect of the invention.

The method may comprise providing insulation, e.g. acoustic insulation an/or preferably thermal insulation, behind the window casing or lining which substantially surrounds the primary glazing assembly and/or the secondary glazing assembly and/or which provides support for the primary case and/or for the mounting frame of the secondary glazing assembly.

The method may comprise removing at least part of the window casing or lining and/or at least some of the members of the window casing or lining.

The method may comprise removing at least part of architraves which may be provided on an innermost part of the window casing or lining.

The method may comprise removing at least part of side shutters or side panels which may extend inwards and may be provided on one or both sides of the primary glazing assembly.

The method may comprise removing at least part of at least one lower panel or window back which may be provided below the primary glazing assembly.

The method may comprise removing at least part of lower side panels or elbows which may be provided below the side shutters or side panels on one or both sides of the primary glazing assembly.

The method may comprise removing at least part of a window cill which may be provided above the lower panel or window back, and/or one or more of the lower side panels or elbows.

The method may comprise removing at least part of at least one upper panel or soff it which may extend inwards and may be provided above the primary glazing assembly.

Advantageously, the method may comprise providing insulation, e.g. thermal insulation, near and/or around the primary glazing assembly, and/or near or against the wall lining and/or building masonry located near and/or around the primary window assembly. By such provision, insulation, e.g. thermal insulation, of a region of a building adjacent or near the primary window assembly may be further improved.

The thermal insulation may comprise rigid insulation and/or blown/injected insulation.

The method may comprise providing rigid insulation in at least part of a region behind the side shutters or side panels, and/or behind the lower panel(s) or window back(s).

The method may comprise providing blown/injected insulation in at least part of a region extending away from the primary glazing assembly within a cavity between the wall lining and the external masonry.

The method may further comprise providing and/or installing the mounting frame of a secondary glazing assembly, e.g. the mounting frame of a secondary glazing assembly according to a first aspect of the present invention.

The secondary mounting frame may be provided against, preferably inwards of the case of the primary glazing unit, such that the secondary mounting frame allows inwards movement or inwards opening of at least part of the primary glazing assembly.

The method may further comprise attaching a stopping member, e.g. a stopping member according to a second aspect of the present invention to the secondary mounting frame or to the primary case by fixing means, to abut the sash of the secondary glazing assembly in a closed configuration.

Preferably, the fixing means may comprise concealed fixing means. By such provision the fixing means may be recessed or flush relative to the stopping member such that the fixing means may not interlere with the operation of the secondary sash, and such that the fixing means may be accessible to a user, e.g. from an inner side of the building and/or of the secondary gazing assembly.

The fixing means may comprise mechanical fixings such as screws, clip fittings, and/or a magnetic catch.

The stopping member may be a stopping member according to the second aspect of the present invention.

The method may further comprise fitting the secondary sash to the secondary mounting frame, e.g. on hinges.

The method may further comprise fixing at least one extendable hinge means, e.g. at least one extendable hinge, to a support surface, e.g. to the primary case or primary inner member.

The at least one extendable hinge means may be an extendable hinge means according to a third aspect of the present invention.

The method may further comprise providing support members or packing members for providing support for the secondary mounting frame, for at least some of the members of the window casing or lining, and/or for at least part of the insulation, e.g. for at least part of the rigid insulation.

The method may further comprise reinstating and/or refitting at least some, preferably all, of members of the window casing or lining, e.g. architraves, side shutters or side panels, lower panel(s) or window back(s), lower side panels or elbows, window cill, and/or upper panel(s) or soffit(s).

BRIEF DESCRIPTION OF DRAWINGS

Embodiments of the present invention will now be described by way of example only, and with reference to the accompanying drawings, which are: Figure la a sectional plan view (through a window case and left side panel) of a traditional sash and case window assembly (with shutters)

according to a first example of the prior art;

Figure lb a sectional plan view (through a panelled window back and left side elbow) of the traditional sash and case window assembly of Figure la; Figure lc a sectional side view (through a window and panelled window back) of the traditional sash and case window assembly of Figure 1 a; Figure 2a a sectional plan view (through a window case and left side panel) of a window assembly according to a first embodiment of the present invention, comprising a secondary glazing assembly made from timber; Figure 2b a sectional plan view (through a panelled window back and left side elbow) of the window assembly of Figure 2a; Figure 2c a sectional side view (through a window assembly and panelled window back) of the window assembly of Figure 2a; Figure 3a an enlarged sectional plan view of the window assembly of Figure 2a; Figure 3b an enlarged sectional plan view of a detachable stopping member and secondary mounting frame of a secondary glazing assembly of the window assembly of Figure 3a; Figure 4 a partially exploded perspective view of the window assembly of Figure 2a, showing the various components of the window casing or lining; Figure 5a a sectional plan view (through a window case and left side panel) of a second example of a traditional sash and case window assembly

according to the prior art;

Figure 5b a sectional plan view (through a panelled window back and left side elbow) of the traditionat sash and case window assembly of Figure 5a; Figure 5c a sectional side view (through a window assembly and panelled window back) of the traditional sash and case window assembly of Figure5a; Figure 6a a sectional plan view (through a window case and left side panel) of a window assembly according to a second embodiment of the present invention, comprising a secondary glazing assembly made from aluminium; Figure 6b a sectional plan view (through a panelled window back and left side elbow) of the window assembly of Figure 6a; Figure 6c a sectional side view (through a window assembly and panelled window back) of the window assembly of Figure 6a; Figure 7a an enlarged sectional plan view of the window assembly of Figure 6a; Figure 7b an enlarged sectional plan view of a detachable stopping member and secondary mounting frame of a secondary glazing assembly of the window assembly of Figure 7a; Figure 8 a partially exploded perspective view of the window assembly of Figure 6a, showing the various components of the window casing or lining; Figure 9a a sectional plan view of a window assembly according to an embodiment of the present invention, comprising a secondary glazing assembly made from aluminium, and an extendable hinge according to a first embodiment of a third aspect of the present invention, showing the hinge in a stowed configuration; Figure 9b a sectional plan view of the window assembly of Figure 9a, showing the extendable hinge in a deployed configuration; Figure lOa a sectional plan view of a window assembly according to an embodiment of the present invention, comprising a secondary glazing assembly made from timber, and an extendable hinge according to a second embodiment of a third aspect of the present invention, showing the hinge in a stowed configuration; Figure lOb a sectional plan view of the window assembly of Figure 1 Oa, showing the extendable hinge in a stowed configuration and attached to the inner sash; Figure 1 Oc a sectional plan view of the window assembly of Figure 1 Oa, showing the extendable hinge in a partially deployed configuration; Figure 1 Od a sectional plan view of the window assembly of Figure 1 Oa, showing the extendable hinge in a fully deployed configuration; Figure ha a sectional plan view of a window assembly according to an embodiment of the present invention (through a window case and right side panel), comprising an extendable hinge according to a third embodiment of a third aspect of the present invention, showing the hinge in a stowed configuration; Figure 11 b a sectional plan view of the window assembly of Figure 11 a, showing the extendable hinge in a position for attachment to the inner sash; Figure lic a sectional plan view of the window assembly of Figure ha, showing the extendable hinge returned to its stowed configuration and attached to the inner sash; Figure lid a sectional plan view of the window assembly of Figure 11 a, showing the extendable hinge in a fully deployed configuration; Figure lie a sectional plan view and additional perspective views from various angles of the extendable hinge of Figure 11 a; Figure hf a sectional plan view and additional perspective views from various angles of the extendable hinge of Figure 11 b; Figure hg a sectional plan view and additional perspective views from various angles of the extendable hinge of Figure 11 c; Figure llh a sectional plan view and additional perspective views from various angles of the extendable hinge of Figure lid;

DETAILED DESCRIPTION OF DRAWINGS

Referring initially to Figures la to ic, there is shown a primary glazing assembly, generally designated 50, according to a first example of the prior art.

In this embodiment the primary glazing assembly 50 is a traditional sash and case window assembly 50, with shutters 1.

The sash and case window assembly 50 comprises an inner sash 15 and an outer sash (not shown). In this embodiment, the inner sash 15 is a lower sash, and the outer sash is an upper sash.

The inner sash 15 and the outer sash are substantially vertically slidable relative to each other.

The sash and case window assembly 50 comprises a primary case 7.

The outer sash is provided and is slidable within an outer groove 21 of the primary case 7. In an alternative embodiment, the outer sash may be stationary relative to the primary case 7.

The inner sash 15 is provided and is slidable within an inner groove 22 of the primary case 7.

The sash and case window assembly 50 further comprises a primary inner member or batten rod 14 to maintain the inner sash 15 in position within the inner groove 22. In this embodiment, the batten rod 14 forms part of the inner groove 22.

As shown on Figure ic, the batten rod 14 extends substantially vertically along the height of the sash and case window assembly 50.

Advantageously, the batten rod 14 is removable. By such provision, when cleaning of the outside face of the inner sash 15 is required, the batten rod 14 can be removed to allow the inner sash 15 to be removed from the inner groove 22, e.g. by swinging the inner sash 15 inwards. The sash and case window assembly 50 is provided with a hinge mechanism (not shown) comprises lugs (e.g. dome-head screws) provided on the inner sash and hinges provided on the primary case.

In this embodiment, the primary case 7 and inner sash 15 of the sash and case window assembly 50 are made from timber.

The sash and case window assembly 50 is provided within a window casing or lining 55, which substantially surrounds the sash and case window assembly 50.

The window casing or lining 55 comprises architraves 6 which are provided on a innermost part of the window casing or lining 55, skirting 17, side panels or shutters 1 which extend inwards and are provided on both sides of the sash and case window assembly 50, a window back 2 which is provided below the sash and case window assembly 50, elbows 3 which are provided below the side panels 1 on both sides of the sash and case window assembly 50, a window cill 16 which is provided above the window back 2 and elbows 3, and a soff it 5 which extends inwards and is provided above the sash and case window assembly 50.

In this embodiment, the architraves 6, skirting 1 7, side panels 1, window back 2, elbows 3, window cill 16, and soffit 5 are made from timber.

As illustrated by the zigzag arrows on Figures la to lc, considerable heat loss occurs through the various parts of the sash and case window assembly 50 and of the window casing or lining 55. Substantial noise penetration also occurs in the reverse arrows direction.

Referring now to Figures 2a to 4, there is shown a window assembly, generally designated 70b, according to a first embodiment the present invention.

The window assembly 70a comprises a primary glazing assembly 50a which is a traditional sash and case window assembly 50a. The sash and case window assembly 50a and the window casing or lining 55a are generally similar to the sash and case window assembly 50 and the window casing or lining 55 of Figures la to ic, like parts being denoted by like numerals, but supplemented by the suffix a'.

The window assembly 70a further comprises a secondary glazing assembly 60a according to a first embodiment the present invention.

The secondary glazing assembly 60a is installed on an inner side of the sash and case window assembly 50a, and is configured to allow inwards movement or inwards opening of the inner sash 15.

The secondary glazing assembly 60a comprises a secondary mounting frame 12a and a secondary sash 61a.

The secondary sash 61a comprises a unitary glass unit 62a, such as a single, double, or triple glazing unit. The secondary sash 61a further comprises a sash frame 63a within which the glass unit 62a is provided.

The secondary mounting frame 12a is configured to allow inwards movement or inwards opening of the inner sash 1 5a.

The secondary mounting frame 12a further comprises a stopping member 64a for abutting the sash 61a of the secondary glazing assembly 60a in a closed configuration.

The stopping member 64a comprises a removable portion 13a. In this embodiment, the removable portion 13a of the stopping member 64a is removably attachable to the secondary mounting frame 12a.

The removable stopping member 13a is removably attached to the secondary mounting frame 12a by concealed fixing means 65a. By such provision, as illustrated in Figure 3b, the fixing means 65a is recessed within the secondary mounting frame 1 2a and the removable stopping member 1 3a and in use, is flush relative to the surface 69a of the removable stopping member 1 3a such that the fixing means GSa does not interfere with the operation of the secondary sash 61 a, and such that the fixing means 65a is accessible to a user from an inner side of the building.

In this embodiment, the fixing means 65a comprises a mechanical fixing 66a such asascrew.

In an alternative embodiment, the fixing means 65a may comprise e.g. clip fittings, or a magnetic catch.

The mechanical fixing 66a is operable using a proprietary socket key (not a shown) which can engage with a complementary portion 67a of the mechanical fixing 66a. By such provision, safety and/or security may be increased.

In this embodiment, the secondary mounting frame 12a comprises a recessed portion 68a for receiving a portion of the removable stopping member 13a and of the fixing means 65a.

In this embodiment, the removable stopping member 13a extends substantially vertically and parallel to one side, e.g. a left side of the secondary mounting frame 1 2a.

As shown on Figure 4, in this embodiment, the removable stopping member 13a extends along part of a left side of the secondary mounting frame 12a, between a bottom end of the secondary mounting frame 12a and beyond a top end of the inner sash 1 5a (when the sash and case window assembly 50a is in a closed configuration).

By such provision, when the removable stopping member 13a and the batten rod 14a are detached, the inner sash iSa may be removed from the inner groove 22a, for example by swinging the lower inner sash iSa inwards as shown in Figure 3a, e.g. for cleaning thereof.

As shown in Figures 2a to 3b, the secondary mounting frame 12a is configured to be fitted within a recess of the window casing or lining such that, when the removable stopping member 13a is detached, a portion of the mounting frame 12a adjacent or near the primary case 7a does protrude beyond or forward of the primary case 7a. The surface of the mounting frame 12a which is in contact with or receives the removable stopping member 13a is substantially flush with the surface of the primary case 7a which is in contact with or receives the batten rod 14a. Thus, the mounting frame 1 2a is substantially concealed.

The secondary glazing assembly 60a comprises sash 61a which is attached to the secondary mounting frame 12a by one or more hinges (not shown) which may be concealed to further reduce the visual impact of the secondary glazing assembly.

In this embodiment, the secondary glazing assembly 60a comprises a "tilt and turn" mechanism.

By such provision the secondary sash 61a may be turned and/or opened, e.g. swung along an arcuate path, e.g. relative to a substantially vertical axis. The secondary sash 61a may also be tilted, e.g. swung along an arcuate path, e.g. relative to a substantially horizontal axis. In this embodiment, the tilting mechanism allows a user to tilt the secondary sash 61a such that it opens near a top portion thereof and/or relative to a substantially horizontal axis located near a bottom portion thereof.

By such provision, controlled ventilation of an interior of a building may be improved by providing a number of opening configurations for the secondary glazing assembly 60a.

The secondary glazing assembly GOa comprises a handle (not shown), for operating, e.g. opening and closing, the secondary sash 61a. In this embodiment, the handle is provided on the secondary sash frame 63a, and is detachable to further reduce the visual impact of the secondary glazing assembly and to further improve safety and/or security. Further, the provision of a detachable handle allows the shutters la to be closed or folded, e.g. near or adjacent an inner face of the secondary glazing assembly 60a, e.g. of the secondary sash 61a, to allow use of at least some, preferably all, original features of the shutters 1 a.

The secondary glazing assembly 60a comprises a closing mechanism (not shown) operated by the handle, and a catching mechanism (not shown) provided within or on the secondary mounting frame 12a or the removable stopping member 13a, and capable of interacting with the closing mechanism to allow a user to close/open the secondary sash 61a by operating the handle. In this embodiment, the closing mechanism and catching mechanism are of conventional type.

In this embodiment, the secondary glazing assembly 60a further comprises a trickle ventilation member (80a) which is provided on the secondary sash frame 63a.

In this embodiment, the secondary glazing assembly 60a is made from timber.

As shown in Figures 2a to 3a and Figure 4, installation of the secondary glazing assembly 60a further permits installation of insulation such as thermal insulation within/around the window assembly 70a.

The method of installing such insulation comprises removing at least part of the members 55a of the window casing or lining. First, the architraves 6a are removed, followed by the side panels or shutters la, window back 2a, elbows 3a, cill 16a, and soff it 5a.

The method further comprises providing timber packers 8a for providing support for the secondary mounting frame, for at least some of the members of the window casing or lining, and/or for at least part of the insulation, e.g. for rigid insulation 1 Oa.

The method further comprises blowing/injecting further insulation 1 la into the exposed/accessible cavity between the wall lining and the external masonry.

The method further comprises fitting the secondary glazing unit 12a, with removable stopping member 1 3a.

The method further comprises securing the secondary sash 61a to the secondary mounting frame 1 2a.

The method further comprises installing new timber facings 9a to cover the timber packers 8a and/or provide support for the members 55a of the window casing or lining and/or to accommodate for the modest increase in the depth of the window assembly 50a.

The method further comprises reinstating the members 55a of the window casing or lining, including soffit 5a, cill 16a, elbows 3a, window back 2a, side panels/shutters 1 a, and architraves 6a, without any alterations requiring to be carried out.

The disturbance to the existing fabric is confined largely to the joinery components, and providing that good practice is followed, there should be very little remedial works required on completion of the process, other than some minor decoration works, specifically to the window architraves 6a and side panels or shutters 1 a where new packing timbers and cover plates have been introduced.

When all elements 55a of the original timber fabric are reinstated, with the installation of the secondary glazing assembly 60a, and with all other insulation works complete, the changes in the overall appearance of the window assembly 50a are minimal.

Referring now to Figures 5a to 5c, there is shown a primary glazing assembly, generally designated 50b, according to a second example of the prior art.

The primary glazing assembly 50b is a traditional sash and case window assembly 50b generally similar to the sash and case window assembly 50 of Figures la to ic, like parts being denoted by like numerals, but with the suffix b.

In this embodiment, the traditional sash and case window assembly SOb comprises plaster or timber lined reveals 1 b.

The sash and case window assembly SOb comprises a primary case 7b and inner sash 15b made from timber.

The window casing or lining 55b comprises skirting 17b, side panels ib, a window back 2b, a window cilI 1 6b, and a soffit Sb. In this embodiment, side panels 1 b, window back 2b, window cill 16b, and soffit Sb comprise tongue and groove lining, plaster on timber lath, or plasterboard on timber frame.

Referring now to Figures 6a to 8, there is shown a window assembly, generally designated 70c, according to a second embodiment of the present invention.

The window assembly 70c comprises a primary glazing assembly SOc which is a traditional sash and case window assembly SOc. The sash and case window assembly SOc and the window casing or lining SSc are generally similar to the sash and case window assembly SOb and the window casing or lining SSb of Figures Sa to Sc, like parts being denoted by like numerals, but supplemented by the suffix c.

The window assembly 70c further comprises a secondary glazing assembly 60c according to a second embodiment of the present invention. The secondary glazing assembly 60c is generally similar to the secondary glazing assembly 60a of Figures 2a to 3c, like parts being denoted by like numerals, but supplemented by the suffix c.

In this embodiment, the secondary mounting frame 1 2c and the secondary sash frame 63c of the secondary glazing assembly GOc are made from aluminium. In an alternative embodiment, the secondary mounting frame 12c and the secondary sash frame 63c of the secondary glazing assembly 60c may be made from another metal such as steel, or from a polymer such as uPVC.

In this embodiment, the secondary mounting frame 12c is attached to a timber packing 8c, and the removable stopping member 13c is removably attached to secondary mounting frame 1 2c by concealed fixing means 65c.

Referring now to Figures 9a and 9b, there is shown a window assembly, generally designated 70d, according to a fourth embodiment of the present invention.

The window assembly 70d is generally similar to the window assembly 70c of Figures 6a to 8, like parts being denoted by like numerals, but supplemented by the suffix d'.

In this embodiment, the secondary mounting frame 12d and the secondary sash frame 63d of the secondary glazing assembly 60d are made from aluminium. In an alternative embodiment, the secondary mounting frame 12d and the secondary sash frame 63d of the secondary glazing assembly 60d may be made from another metal such as steel, or from a polymer such as uPVC, or from timber.

The window assembly 70d further comprises a plurality of extendable hinges 1 OOd according to a first embodiment of a third aspect the present invention.

In this embodiment, the window assembly 70d comprises two extendable hinges lOUd which connect a left side portion of the frame of the inner sash 15d to the batten rod 14d on the left side of the window assembly 70d. In another embodiment, the window assembly 70d may comprise one, three or more extendable hinges lOOd.

In an alternative embodiment, the extendable hinges lOOd may connect the frame of the inner sash 1 Sd to the sash case 7d.

As shown on Figure 9b, the extendable hinge lOOd is configured to extend at least partially away from the batten rod 14d upon inwards opening or inwards movement of the inner sash 1 Sd. By such provision, upon inwards opening or inwards movement of the inner sash lSd, the inner sash 15d may be fully opened, in this embodiment to approximately 90° relative to a closed configuration. In the fully opened configuration, the inner sash lSd does not contact or interfere with the secondary mounting frame 12d or the secondary sash frame 63d of the secondary glazing assembly 60d. The extendable hinge 1 OOd is configured to allow the inner sash 1 Sd to hinge and/or pivot at a distance from the batten rod 1 4d.

The extendable hinge 1 OOd comprises a first hinge member 101 d configured for connection and/or attachment to/on the batten rod 1 4d.

The first hinge member lOld comprises, e.g. holes (not shown) for receiving and/or fixing the first hinge member lOld to the batten rod 14d, by fixing means such as bolts or screws (not shown).

The extendable hinge lOOd comprises a second hinge member 102d configured for connection and/or attachment to/on the inner sash 1 5d.

Typically, the second hinge member 102d comprises two receiving portions (not shown) adapted to receive fixing means such as bolts or screws for connection and/or attachment to/on the inner sash 1 5d.

In this embodiment, the extendable hinge lOOd comprises an intermediate hinge member 103d.

The intermediate hinge member 103d is connected by a first pivotal pinned connection hid to the first hinge member bid.

The intermediate hinge member 103d is connected by a second pivotal pinned connection 112d to the second hinge member 102d. As shown on Figure 9a, the second hinge member 102d may be pivoted around second pivotal pinned connection 11 2d in order to secure the second hinge member 1 02d to the inner sash 1 Sd.

Referring now to Figures lOa to lOd, there is shown a window assembly, generally designated 70e, according to a fifth embodiment of the present invention.

The window assembly 70e is generally similar to the window assembly 70d of Figures 9a and 9b, like parts being denoted by like numerals, but supplemented by the suffix e'.

In this embodiment, the secondary mounting frame 12e and the secondary sash frame 63e of the secondary glazing assembly 60e are made from timber. In an alternative embodiment, the secondary mounting frame 12e and the secondary sash frame 63e of the secondary glazing assembly 60e may be made from a metal such as steel or aluminium, or from a polymer such as uPVC.

The window assembly 70e further comprises a plurality of extendable hinges 1 OOe according to a second embodiment of a third aspect the present invention.

The extendable hinge lOOe is similar to the extendable hinge hOOd of Figures 9a and 9b. However, in this embodiment, the extendable hinge lOOe comprises two intermediate hinge member 103e,104e.

The extendable hinge lOOe comprises a first intermediate hinge member 103e connected by a first pivotal pinned connection 111 e to the first hinge member 101 e.

The extendable hinge lOOe further comprises a second intermediate hinge member 104e connected by a second pivotal pinned connection 112e to the second hinge member 1 02e.

The first intermediate hinge member 1 03e is connected by a third pivotal pinned connection 11 3e to the second intermediate hinge member 1 04e.

As shown on Figure lOb, the second hinge member 102e may be pivoted around second pivotal pinned connection 1 12e in order to secure the second hinge member 102e to the inner sash 1 5e by a bolt 1 20e.

As shown on Figure lOc, upon initial opening of the inner sash 15e, the extendable hinge lOOe extends partially away from the batten rod 14e.

As shown on Figure lOd, upon full opening of the inner sash 15e, the extendable hinge lOOe extends fully away from the batten rod 14e. By such provision, upon inwards opening or inwards movement of the inner sash 15e, the inner sash 15e may be fully opened, in this embodiment to approximately 90° relative to a closed configuration. In the fully opened configuration (Figure lOd), the inner sash 15e does not contact or interfere with the secondary mounting frame 12e or the secondary sash frame 63e of the secondary glazing assembly 60e.

It will be appreciated that alternative embodiments of the extendable hinge lOOd,lOOe of Figures 9a to lOd may be envisaged, e.g. comprising more than two intermediate members, e.g. in cases where longer hinge extension may be required.

Referring now to Figures ha to lid, there is shown a window assembly, generally designated 70f, according to a sixth embodiment of the present invention.

The window assembly 70f is generally similar to the window assembly 70d of Figures 9a and 9b, or to the window assembly 70e of Figures iOa to hOd, like parts being denoted by like numerals, but supplemented by the suffix f.

In this embodiment, the secondary mounting frame 12f and the secondary sash frame 63f of the secondary glazing assembly 60f are made from either timber or aluminium. In an alternative embodiment, the secondary mounting frame 12f and the secondary sash frame 63f of the secondary glazing assembly 60f may be made from another metal such as steel, or from a polymer such as uPVC.

The window assembly 70f further comprises a plurality of extendable hinges hOOf according to a third embodiment of a third aspect the present invention.

In this embodiment, the window assembly 70f comprises two extendable hinges lOOf which connect a right side portion of the frame of the inner sash 15f to the batten rod 14f on the right side of the window assembly 70f. In another embodiment, the window assembly 70f may comprise more than two, e.g. three or more extendable hinges lOOf.

The extendable hinge lOOf comprises a first hinge member lOif configured for connection and/or attachment to/on the batten rod 14f. In an alternative embodiment, the first hinge member lOif may be connected to the sash case 7f.

The first hinge member lOif comprises, e.g. holes (not shown) for receiving and/or fixing the first hinge member lOif to the batten rod 14f, by fixing means such as bolts or screws (not shown).

The extendable hinge 1 OOf comprises a second hinge member 1 02f configured for connection and/or attachment to/on the inner sash 1 5f.

As shown on Figures lie to 11 h, the second hinge member 1 02f comprises two receiving portions 121f,122f in the form of an upper elongated slot 121f and a lower elongated slot 122f, adapted to receive fixing means such as bolts or screws for connection and/or attachment to/on the inner sash 15f. The upper elongate receiving portion 121f and the lower elongate receiving portion 122f are symmetrical. By such provision the extendable hinge lOOf may be used on either side, .e.g. left or right side, of the inner sash 1 5f.

The extendable hinge lOOf comprises a first intermediate hinge member 103f pivotally connected to the first hinge member lOif by first pinned connection 11 if,1 1 if'.

The first intermediate hinge member 1 03f is pivotally connected to the second hinge member 102f by second pinned connection 112f,112f'.

The extendable hinge lOOf comprises a second intermediate hinge member 104f pivotally connected to the first hinge member lOif by third pinned connection 11 3f.

The second intermediate hinge member 104f is pivotally connected to the second hinge member 102f by fourth pinned connection 1 14f.

As shown in Figures ha, lic, lie and hg, the first pinned connection iiif,iiif' and the fourth pinned connection 114f are aligned and share a common axis, in a stowed configuration. The second pinned connection 1 12f,i 12f' and the third pinned connection 113f are also aligned and share a common axis in a stowed configuration.

As shown on Figures lib and hf, in use, the second hinge member 102f may be moved near, against or adjacent the inner sash 15f, e.g. for attachment by means of a bolt 120f, by pivoting the first intermediate hinge member 103f relative to the first hinge member lOif around the first pinned connection lllf,iiif', and by pivoting the second hinge member 102f relative to the second intermediate hinge member 104f around the fourth pinned connection 1 14f.

As shown on Figures lid and iih, in use, opening of the inner sash 15d is permitted by pivoting the second hinge member 102f relative to the first intermediate hinge member 103f around the second pinned connection 112f,112f', and by pivoting the second intermediate hinge member 104f relative to the first hinge member lOif around the third pinned connection ii 3f.

By such provision, upon inwards opening or inwards movement of the inner sash member 15f, the inner sash member 15f may be fully opened, in this embodiment to approximately 900 relative to a closed configuration, without contacting or interfering with the secondary mounting frame 12f or the secondary sash frame 63f of the secondary glazing assembly 60f.

It will be appreciated that the embodiments of the present invention hereinbefore described are given by way of example only and are not meant to be limiting thereof in any way.

Claims

CLAIMS: 1. A secondary glazing assembly for installation in association with an inner side of a primary glazing assembly, wherein the secondary glazing assembly is configured to allow inwards movement or inwards opening of at least part of the primary glazing assembly.
2. A secondary glazing assembly according to claim 1, wherein the primary glazing assembly comprises a sash and case window.
3. A secondary glazing assembly according to claim 1 or claim 2, wherein the primary glazing assembly comprises at least one inner sash and/or at least one outer sash..-15
4. A secondary glazing assembly according to any preceding claim, wherein the primary glazing assembly comprises a primary inner member or "batten rod" to LI) maintain the inner sash in position within an inner groove of the primary glazing Q assembly. Coy-20
5. A secondary glazing assembly according to any preceding claim, wherein the secondary glazing assembly comprises a secondary mounting frame.
6. A secondary glazing assembly according to any preceding claim, wherein the secondary glazing assembly comprises a secondary sash.
7. A secondary glazing assembly according to claim 6, wherein the secondary glazing assembly comprises a turning mechanism to allow the secondary sash to open relative to a substantially vertical axis, and/or a tilting mechanism to allow the secondary sash to open relative to a substantially horizontal axis.
8. A secondary glazing assembly according to claim 6 or claim 7, wherein the secondary sash comprises a glass unit provided within a sash frame thereof.
9. A secondary glazing assembly according to any of claims 6 to 8, wherein the secondary sash is of a similar dimension to the dimension of the primary glazing assembly.
10. A secondary glazing assembly according to any of claims 5 to 9, wherein the secondary mounting frame is configured to allow inward movement or inward opening of at least part of the primary glazing assembly.
11. A secondary glazing assembly according to claim 10, wherein the secondary mounting frame is configured to allow inward movement or inward opening of the inner sash.
12. A secondary glazing assembly according to any preceding claim, wherein the secondary glazing assembly further comprises a stopping member for abutting the/a sash of the secondary glazing assembly in a closed configuration.
13. A secondary glazing assembly according to claim 12, wherein at least a portion of the stopping member is removably attachable to the secondary mounting frame and/or to the primary case. L()14. A secondary glazing assembly according to claim 13, wherein the removable CO 20 portion of the stopping member is removably attached to the secondary mounting frame and/or to the primary case by concealed fixing means which are recessed or flush relative to the stopping member.15. A secondary glazing assembly according to claim 14, wherein the fixing means comprises mechanical fixings, wherein at least one of the mechanical fixings are operated using a proprietary socket key.16. A secondary glazing assembly according to any of claims 14 to 15, wherein the secondary mounting frame and/or the primary sash comprises at least a portion or member for receiving or interacting with the fixing means.17. A secondary glazing assembly according to any of claims 12 to 16, wherein the removable portion of the stopping member extends substantially parallel to a side of the secondary mounting frame and/or of the primary case.18. A secondary glazing assembly according to any of claims 12 to 17, wherein the removable portion of the stopping member extends along a side of the secondary mounting frame opposite the side to which the secondary sash is attached.19. A secondary glazing assembly according to any of claims 12 to 18, wherein the removable portion of the stopping member extends along a height of the secondary mounting frame and/or the primary case substantially equal to or greater than the height of the inner sash.20. A secondary glazing assembly according to any of claims 5 to 19, wherein the mounting frame is configured to be fitted at least partially within a recess of a window casing or lining surrounding the primary glazing assembly and/or the secondary glazing assembly.21. A secondary glazing assembly according to any of claims 6 to 20, wherein the secondary sash is attached to the secondary mounting frame by concealed hinges.22. A secondary glazing assembly according to any of claims 6 to 21, wherein the secondary glazing assembly comprises at least one handle which operates a closing CO 20 mechanism for closing and/or opening the secondary sash.23. A secondary glazing assembly according to claim 22, wherein the handle is provided on and is detachable from the secondary sash frame.24. A secondary glazing assembly according to any of claims 22 to 23, wherein the secondary mounting frame comprises a catching mechanism capable of interacting with the closing mechanism.25. A secondary glazing assembly according to any of claims 5 to 24, wherein the secondary mounting frame and/or the secondary sash frame is made from timber, a metal or a polymer material.26. A stopping member for use in the secondary glazing assembly according to any of claims l2to 25.27. An extendable hinge for connecting a first or openable member and a second member.28. An extendable hinge according to claim 27, wherein the first or openable member comprises the inner sash of a sash and case window.29. An extendable hinge according to claim 27, wherein the second member comprises a fixed or support surface, optionally the primary case or primary inner member of a sash and case window.30. An extendable hinge according to any of claims 27 to 29, wherein the hinge is configured to extend at least partially away from the second member upon inwards opening or inwards movement of the first member.31. An extendable hinge according to any of claims 27 to 30, wherein the hinge is configured to allow the first member to hinge and/or pivot at a distance from the second member. L()32. An extendable hinge according to any of claims 27 to 31, wherein the hinge CO 20 allows the first member to be positioned adjacent the second member in a first disposition and to be positioned spaced from or distal the second member in a second disposition.33. An extendable hinge according to any of claims 27 to 32, wherein the hinge comprises at least one first hinge member configured for connection and/or attachment to/on the primary case or on the primary inner member, and at least one second hinge member configured for connection and/or attachment to/on the inner sash.34. An extendable hinge according to claim 33, wherein the at least one second hinge member comprises a first or upper elongate receiving portion or opening extending from a first or upper side of the second hinge member, and a second or lower elongate receiving portion or opening extending from an opposite or lower side of the second hinge member.35. An extendable hinge according to claim 34, wherein the first or upper elongate receiving portion, and the second or lower elongate receiving portion are symmetrical.36. An extendable hinge according to any of claims 33 to 35, wherein the hinge comprises at least one intermediate hinge member connected by a pivotal connection to the at least one first hinge member and/or to the at least one second hinge member.37. An extendable hinge according to claim 36, wherein the pivotal connection comprises a pinned connection.38. An extendable hinge according to any of claims 36 to 37, wherein in a stowed configuration, the first hinge member, the at least one intermediate member, and the second hinge member are substantially abutting and/or are in close proximity to each other and/or to the second member.39. An extendable hinge according to any of claims 36 to 38, wherein in a deployed configuration, the first hinge member, the at least one intermediate member, and/or the second hinge member extend at least partially away from the second member upon inwards opening or inwards movement of the inner sash member.CO 20 40. An extendable hinge according to any of claims 33 to 35, wherein the hinge comprises a first intermediate hinge member connected to the first hinge member by at least one first pivotal connection, and connected to the second hinge member by at least one second pivotal connection.41. An extendable hinge according to claim 40, wherein the hinge comprises a second intermediate hinge member connected to the first hinge member by at least one third pivotal connection, and connected to the second hinge member by at least one fourth pivotal connection 42. An extendable hinge according to any of claims 40 to 41, wherein the at least one first, second, third and/or fourth pivotal connection comprises a pinned connection.43. An extendable hinge according to any of claims 40 to 42, wherein the at least one first pivotal connection and the at least one fourth pivotal connection are aligned and/or share a common axis of rotation in a stowed configuration.44. An extendable hinge according to any of claims 40 to 43, wherein the at least one second pivotal connection and the at least one third pivotal connection are aligned and/or share a common axis of rotation in a stowed configuration.45. An extendable hinge according to any of claims 40 to 44, wherein the at least one first pivotal connection, at least one second pivotal connection, at least one third pivotal connection, and/or at least one first pivotal connection comprises one to five, optionally one or two pivotal connections.46. An extendable hinge according to any of claims 40 to 45, wherein, in use, the second hinge member is moved near, against or adjacent the inner sash by pivoting the first intermediate hinge member relative to the first hinge member around the at least one first pivotal connection, and by pivoting the second hinge member relative to the second intermediate hinge member around the at least one fourth pivotal connection.47. An extendable hinge according to any of claims 40 to 46, wherein, in use, opening of the inner sash is permitted by pivoting the second hinge member relative to the first intermediate hinge member around the at least one second pivotal connection, CO 20 and by pivoting the second intermediate hinge member relative to the first hinge member around the at least one third pivotal connection.48. A window assembly comprising a secondary glazing assembly according to any of claims 1 to 25, a stopping member according to claim 26, or an extendable hinge according to any of claims 27 to 47.49. A window assembly according to claim 48, further comprising a primary glazing assembly.50. A window assembly according to claim 49, wherein the primary glazing assembly comprises one to five, optionally two extendable hinge means according to any of claims 27 to 47, which connect or attach one side of the inner sash to the primary case or to the primary inner member.51. A window assembly according to any of claims 48 to 50, wherein the primary glazing assembly and/or the secondary glazing assembly is provided within a casing or lining which substantially surrounds the primary glazing assembly and/or the secondary glazing assembly and/or which provides support for the primary case and/or a secondary glazing assembly mounting frame.52. A window assembly according to any of claims 48 to 51, wherein the primary and/or secondary glazing assembly comprises retention means adapted for preventing or restricting movement of the inner sash beyond a predetermined opening configuration.53. A building comprising a secondary glazing assembly according to any of claims 1 to 25, a stopping member according to claim 26, an extendable hinge according to any of claims 27 to 47, or a window assembly according to any of claims 48 to 52.54. A method of installing a secondary glazing assembly according to any of claims 1 to 25, comprising providing insulation behind althe window casing or lining which substantially surrounds a'the primary glazing assembly and/or althe secondary glazing LI) assembly.CO 20 55. A method according to claim 54, wherein the window casing or lining provides support for the primary case and/or for the mounting frame of the secondary glazing assembly.56. A method according to claim 54 or claim 55, wherein the insulation comprises thermal insulation and/or acoustic insulation.57. A method according to any of claims 54 to 56, comprising removing at least part of the window casing or lining and/or at least some of the members of the window casing or lining.58. A method according to claim 57, comprising removing at least part of architraves provided on an innermost part of the window casing or lining.59. A method according to claim 57 or claim 58, comprising removing at least part of side shutters or side panels which may extend inwards and may be provided on one or both sides of the primary glazing assembly.60. A method according to any of claims 57 to 59, comprising removing at least part of at least one lower panel or window back which may be provided below the primary glazing assembly.61. A method according to any of claims 57 to 60, comprising removing at least part of lower side panels or elbows which may be provided below the side shutters or side panels on one or both sides of the primary glazing assembly.62. A method according to any of claims 57 to 61, comprising removing at least part of a window cill which may be provided above the lower panel or window back, and/or one or more of the lower side panels or elbows.63. A method according to any of claims 57 to 62, comprising removing at least part of at least one upper panel or soff it which may extend inwards and may be provided above the primary glazing assembly. L()64. A method according to any of claims 54 to 63, comprising providing insulation CO 20 near and/or around the primary glazing assembly, the wall lining and/or building masonry located near and/or around the primary window assembly.65. A method according to any of claims 54 to 64, wherein the thermal insulation comprises rigid insulation and/or blown/injected insulation.66. A method according to any of claims 54 to 65, comprising providing rigid insulation in at least part of a region behind the side shutters or side panels, and/or behind the lower panel(s) or window back(s).67. A method according to any of claims 54 to 66, comprising providing blown/injected insulation in at least part of a region extending away from the primary glazing assembly within a cavity between the wall lining and the external masonry.68. A method according to any of claims 54 to 67, comprising providing and/or installing the mounting frame of the secondary glazing assembly inwards of the case of the primary glazing unit, such that the secondary mounting frame allows inwards movement or inwards opening of at least part of the primary glazing assembly.69. A method according to claim 68, further comprising attaching a stopping member according to claim 26 to the secondary mounting frame or to the primary case by fixing means, to abut the sash of the secondary glazing assembly in a closed configuration.70. A method according to claim 69, wherein the fixing means comprises concealed fixing means.71. A method according to any of claims 68 to 70, further comprising fitting the secondary sash to the secondary mounting frame.72. A method according to any of claims 54 to 71, further comprising fixing at least one extendable hinge according to any of claims 27 to 47 to the primary case or primary inner member. L()73. A method according to any of claims 54 to 72, further comprising providing CO 20 support members or packing members for providing support for the secondary mounting frame, for at least some of the members of the window casing or lining, and/or for at least part of the insulation.74. A method according to any of claims 54 to 73, further comprising reinstating and/or refitting at least some of the members of the window casing or lining.75. A secondary glazing unit substantially as described in Figures 2a to 11 h. 76. A stopping member substantially as described in Figures 2a to 8.77. An extendable hinge substantially as described in Figures 9a to 11 h. 78. A window assembly substantially as described in Figures 2a to 11 h. 79. A method of installing a secondary glazing unit substantially as described in Figures 2ato llh. r rLU Co r