GB2178096A - Timber windows - Google Patents

Abstract

A timber window has an outer frame 11 with jambs 10 on which are mounted respective pairs of plastics extruded channels, 14, 15 located side by side. A tension balance and window support is mounted in each channel 14, 15 to tiltably support windows 17, 18. The channels have co-operating formations 19, 20, 21, 22 to allow them to be placed side by side or in a stepped formation. <IMAGE>

Description

SPECIFICATION "Timber Windows" This invention relates to sash windows and in particular, but not exclusively, to windows in which the light can be tilted outwardly of the plane of the window.

Such tiltable sash windows are well known in aluminium and plastics, where the outer frame elements are extruded and there is no difficulty in providing suitable channels to receive the tension balance and window supports. However, there is a trend to timber windows and considerable difficulties have been experienced in achieving a comparable structure.

It is an object of the invention to overcome or mitigate the problems associated with timber windows.

From one aspect the invention consists in a timber window comprising a timber outer frame, a metal or plastics channel mounted on each jamb of the frame, a tension balance mounted in each channel and having a window support slidably located in the respective channel and a timber frame slidably located in the outer frame by the window supports.

Preferably, the window further comprises a further channel mounted on each jamb with a tension balance and a window support mounted in each channel, and a further window mounted between a further support. The further channels may be inset into the space defined by the window to provide an abutment face for the first mentioned window.

Each first channel may have a pair of spaced formations engaging its respective further channel, one of the pair defining a side by side position for the associated channels and the second of the pair defining a stepped position for the channels.

The further channel may have an inward extension to provide a weather seal for the window and each of the channels may have inwardly turned lips for retaining the window supports.

Although the invention has been defined above, it should be understood that it includes any inventive combination of the features set out above or in the following description. Although an object of the invention has been stated, the invention is not limited to windows fulfilling that object.

The invention may be performed in various ways and specific embodiments will now be described by way of example, with reference to the following drawings in which: Figure 1 is a cross section through a window jamb showing a side by side arrangement; Figure 2 is a similar view of a stepped arrangement; Figure 3 is a cross section of an alternative channel formation; and Figure 4 is a cross section through a further channel.

Referring to Fig. 1 the jamb 10 of an outer window frame 11 is constituted by a base member 12 and facing members 13. Two plastics extruded channels 14, 15 are located side by side within the open mouthed rebate 16 defined by the jamb 10.

In use a tension balance and window tilt support, for example such as the one supplied by Caldwell Hardware (U.K) Limited under the Trade Mark Alumatilt, is disposed within the channels 14, 15 to support respective timber windows 17, 18 for tilting if required.

It will be noted that the channel 15 has a pair of dependent projections 19, 20. In the side by side position illustrated in Fig. 1 the lower of these projections 20 rests on a support ledge 21 which extends laterally from the channel 14, whilst the upper abuts against a dependent wall 22 on the channel 14. In contrast in the stepped arrangement shown in Fig. 2 the upper projection 19 engages with both the ledge 21 and wall 22. Thus these engaging formations clearly define the two respective arrangements of the channels whilst avoiding the necessity for expensive unitary extrusions.

The arrangement can be even further simplified by using channels of the type indicated in Figs. 3 and 4, where regular sections are used and the channels can be fitted as either the inner or outer locations. These channels may also be extruded in metal.

Thus the formation of these various channels provide a simple method of using sophisticated modern sash balance and tilt supports within timber windows.

1. A timber window comprising a timber outer frame, a metal or plastics channel mounted on each jamb of the frame, a tension balance mounted in each channel and having a window support slidably located in the respective channel and a timber frame slidably supported in the outer frame by the window supports.

2. A window as claimed in claim 1 further comprising a further channel mounted on each jamb with respective tension balances and window support herein and a further window mounted between the further supports.

3. A window as claimed in claim 2 wherein the further channels are inset into the space defined by the outer frame to provide an abutment face for the first mentioned window.

4. A window as claimed in claim 2 or claim 3, wherein the first channel has a pair of spaced formations for engaging its respective further channels, one of the pair defining a side-by-side position for the associated channels and the second of the pair defining a stepped position for the channels.

**WARNING** end of DESC field may overlap start of CLMS **.

Claims (7)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION "Timber Windows" This invention relates to sash windows and in particular, but not exclusively, to windows in which the light can be tilted outwardly of the plane of the window. Such tiltable sash windows are well known in aluminium and plastics, where the outer frame elements are extruded and there is no difficulty in providing suitable channels to receive the tension balance and window supports. However, there is a trend to timber windows and considerable difficulties have been experienced in achieving a comparable structure. It is an object of the invention to overcome or mitigate the problems associated with timber windows. From one aspect the invention consists in a timber window comprising a timber outer frame, a metal or plastics channel mounted on each jamb of the frame, a tension balance mounted in each channel and having a window support slidably located in the respective channel and a timber frame slidably located in the outer frame by the window supports. Preferably, the window further comprises a further channel mounted on each jamb with a tension balance and a window support mounted in each channel, and a further window mounted between a further support. The further channels may be inset into the space defined by the window to provide an abutment face for the first mentioned window. Each first channel may have a pair of spaced formations engaging its respective further channel, one of the pair defining a side by side position for the associated channels and the second of the pair defining a stepped position for the channels. The further channel may have an inward extension to provide a weather seal for the window and each of the channels may have inwardly turned lips for retaining the window supports. Although the invention has been defined above, it should be understood that it includes any inventive combination of the features set out above or in the following description. Although an object of the invention has been stated, the invention is not limited to windows fulfilling that object. The invention may be performed in various ways and specific embodiments will now be described by way of example, with reference to the following drawings in which: Figure 1 is a cross section through a window jamb showing a side by side arrangement; Figure 2 is a similar view of a stepped arrangement; Figure 3 is a cross section of an alternative channel formation; and Figure 4 is a cross section through a further channel. Referring to Fig. 1 the jamb 10 of an outer window frame 11 is constituted by a base member 12 and facing members 13. Two plastics extruded channels 14, 15 are located side by side within the open mouthed rebate 16 defined by the jamb 10. In use a tension balance and window tilt support, for example such as the one supplied by Caldwell Hardware (U.K) Limited under the Trade Mark Alumatilt, is disposed within the channels 14, 15 to support respective timber windows 17, 18 for tilting if required. It will be noted that the channel 15 has a pair of dependent projections 19, 20. In the side by side position illustrated in Fig. 1 the lower of these projections 20 rests on a support ledge 21 which extends laterally from the channel 14, whilst the upper abuts against a dependent wall 22 on the channel 14. In contrast in the stepped arrangement shown in Fig. 2 the upper projection 19 engages with both the ledge 21 and wall 22. Thus these engaging formations clearly define the two respective arrangements of the channels whilst avoiding the necessity for expensive unitary extrusions. The arrangement can be even further simplified by using channels of the type indicated in Figs. 3 and 4, where regular sections are used and the channels can be fitted as either the inner or outer locations. These channels may also be extruded in metal. Thus the formation of these various channels provide a simple method of using sophisticated modern sash balance and tilt supports within timber windows. CLAIMS

1. A timber window comprising a timber outer frame, a metal or plastics channel mounted on each jamb of the frame, a tension balance mounted in each channel and having a window support slidably located in the respective channel and a timber frame slidably supported in the outer frame by the window supports.

2. A window as claimed in claim 1 further comprising a further channel mounted on each jamb with respective tension balances and window support herein and a further window mounted between the further supports.

3. A window as claimed in claim 2 wherein the further channels are inset into the space defined by the outer frame to provide an abutment face for the first mentioned window.

4. A window as claimed in claim 2 or claim 3, wherein the first channel has a pair of spaced formations for engaging its respective further channels, one of the pair defining a side-by-side position for the associated channels and the second of the pair defining a stepped position for the channels.

5. A window as claimed in any one of claims 2 to 4 wherein the further channel has an inward extension to provide a weather seal.

6. A window as claimed in any one of the preceding claims, wherein the channels have inturned lips for retaining the window supports.

7. A timber window substantially as hereinbefore defined, with reference to the accompanying drawings.