GB2159562A - Window glazing assembly - Google Patents

Abstract

A window glazing assembly includes a glazing strip (6) for along the bottom edge of a pane (2). Spacer clips (18) are fitted to the bottom of said pane (2) which is then inserted into a channel formed by an upper part of a first rear limb (7), a rear part of a third limb (14) and a ramp (16). Condensation running down the inside of said pane (2) passing into said channel thence via drain openings (17) into a duct formed between a second forwardly and downwardly sloping limb (10) and a third limb (14). The condensate then out flows through drain openings (19) in an extension of the limb (10) between a first downturned end 11 and a second downturned end 15. <IMAGE>

Description

SPECIFICATION Window glazing assembly This invention relates to a window glazing assembly.

A window comprises a frame or sash of wood or metal fitted with one or more panes of glazing material, for example glass or plastics material. Alternatively, the window may be fitted with one or more double-pane sealed units, commonly referred to as "double-glazed units". Hereinafter, in the specification and claims, the term "pane" is used to include a single pane or a double-pane sealed unit. The area bounded by the sash is subdivided by glazing bars when several panes are to be fitted therein.

The inner surround of the area or each subarea to be fitted with a pane is peripherally stepped and presents a surface in a plane parallel to and backing that to be occupied by the pane and surfaces at right-angles thereto and extending outwardly therefrom, i.e. towards the exterior, to provide a ledge to support glazier's putty or glazing strips for fixing the pane in position.

It has been found that when window panes are fixed in position as aforesaid, there is a likelihood of condensation occurring on the inside faces of the panes. Mainly, this has been caused by insufficient ventilation in the room of the dwelling in which the window is located. Also, when condensation occurs, the condensate runs down said inside face of the or each pane and collects at the bottom of the inner surround of the areas or sub-areas fitted with the panes.

If this condensate is not removed after it occurs, through time the bottom of the said inner surround, if of wood, begins to rot and, if of metal, begins to rust.

In British Patent No. 1,504,285, a window glazing assembly has been proposed comprising a window frame, a pane of glazing material therein and a glazing strip along at least the bottom edge of the pane, said frame having on at least its bottom frame member a forwardly and downwardly directed stepped portion providing a raised rear inner surround transverse to the pane and a lower forward inner surround transverse to the pane, said glazing strip in cross-section presenting a rear limb abutting the rise of the step and extending inwardly of the frame beyond the rear inner surround surface, said rear limb having a reverse-bend portion which overlies and engages said surface, a second limb spaced forwardly of and parallel or substantially paral lel to said rear limb, of substantially lesser depth than the rise of the step, and resting on the forward inner surround surface rearwardly of the front edge thereof, a shelf extending from said rear limb across and beyond said second limb with the root of said shelf spaced from the bottom of said rear limb an amount greater than the depth of said second limb, and a resilient ramp rooted to said shelf in the vicinity of said front limb and extending to adjacent said rear limb near the transition of the latter into its reverse-bend to provide a gap through which the edge of the pane passes to rest against said shelf with the rear surface of the pane backed by the front surface of said rear limb above said shelf, a weep hole being provided in said ramp where it merges with said shelf and a seating for glaziers putty formed by the portion of the forward inner surround extending from the front edge thereof to the adjacent limb.

A window glazing assembly is also known comprising a window frame, a pane of glazing material therein and a glazing strip along the bottom edge of the pane, said frame having a peripheral seating against which the pane is located and fixed, and having on at least its bottom frame member a forwardly and downwardly directed stepped portion providing a raised rear inner surround transverse to the pane and a lower forward inner surround transverse to the pane, the front of the raised rear inner surround being rebated rearwardly beyond said seating, said glazing strip in cross-section presenting a first rear limb abutting the rise of the step and extending inwardly of the frame, a second rear limb inserted into a sawcut in the lower forward inner surround and adjacent to the rise and extending outwardly of the frame, a third forwardly and downwardly sloping limb resting on the lower forward inner surround, extending therebeyond and terminating in a first downturned end, a fourth limb parallel with the first rear limb and spaced forwardly therefrom, a fifth limb parallel with the third limb, spaced there above, extending therebeyond and terminating in a second downturned end so as to define a condensation duct extending between the first and fourth limbs, between the third and fifth limbs and between the first and second downturned ends, and a rigid sixth limb parallel with the fourth limb, spaced forwardly therefrom and rooted in the fifth limb so as to define a seating channel for receiving the bottom edge of the pane and mastic.

In the above-mentioned British Patent, a series of spacer clips is provided spaced from one another along at least the peripheral lower edge of the or each pane, the clips being accommodated in the respective gap defined between the rear limb, the shelf and the ramp, the clips serving to space the or each pane from abutment with the rear limb and with the shelf. A series of weep holes is provided in each strip in spaced relation along the ramp, part of each hole being level with the shelf surface. Thus condensation on the inner surface of the pane can run directly down the inner surface of the pane to the bottom edge thereof without interruption. The condensation then can run under the bottom edge of the pane down the shelf and out through the weep holes from whence it runs down a bevelled surface of glaziers putty and onto the surround.A disadvantage of this construction is that if the surround is made of wood or of steel, the running condensate could lead to rotting or rusting, respectively of the surround.

In the other known construction described above, the condensation on the inner surface of the pane has no uninterrupted run to the bottom edge thereof, the condensate having to run down the fourth limb in order to enter the condensation duct. Furthermore, since the sixth limb is rigid, unlike the resilient ramp on the above- mentioned British Patent, it is necessary to seat the bottom edge of the pane with mastic for it to remain firm.

The said known other construction has however the advantage that the condensate can drip from the duct between the downturned ends, clear of the surround so as to reduce the risk of rotting or rusting of wooden or steel surrounds. The present invention also has this advantage together with the advantages in the above-mentioned British Patent of an uninterrupted run for condensation to the bottom edge of the pane and the resilient ramp.

According to the invention there is provided a window glazing assembly comprising a window frame, a pane of glazing material therein and a glazing strip along the bottom edge of the pane, said frame having on its bottom frame member a forwardly and downwardly directed stepped portion providing a raised rear inner surround transverse to the pane, said glazing strip in cross-section presenting a first rear limb abutting the rise of the step and extending upwardly of the frame beyond the rear inner surround surface, said rear limb having a reverse-bend portion which overlies and engages or engages behind said surface, a second forwardly and downwardly sloping limb overlying the lower forward surround, a third limb spaced above the second limb, rooted in the first limb and a resilient ramp spaced forwardly of the first limb, rooted in the third limb and extending to adjacent said first limb near the transition of the latter into its reverse-bend to provide a gap for receiving the pane, an upper part of the first limb, a rear part of the third limb and the ramp together defining a channel having drain openings in the rear part of the third limb, and the second and third limbs defining a condensation duct communicating with the channel via said openings, and a series of spacer clips spaced from one another along the bottom edge of the pane, the clips being accommodated in the channel and serving to space the pane from abutment with the upper part of the first limb and the rear part of the third limb.

Preferably, the second limb extends beyond said lower forward inner surround and terminates in a first downturned end, and the third limb extends beyond the second limb and terminates in a second downturned end.

An embodiment of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which: Figure 1 is a vertical cross-sectional view of a bottom portion of a window glazing assembly wherein the window frame is made of wood; Figure 2 is a similar to Fig. 1 but wherein the window frame is made of steel; Figure 3 is a perspective view of one corner of a window glazing assembly with a glazing strip modified from that shown in Fig. 1; and Figures 4A and 4B are respectively two cross-sectional views showing two consecutive stages in locating a pane of glass in a glazing strip.

In Figs. 1, 3, 4A and 4B, a window glazing assembly has a rectangular wooden window frame in which a single pane 2 of glazing material is located. The bottom member 1 of the frame is provided with a forwardly and downwardly stepped portion which provides, a raised rear inner surround surface 3, a lower forward surround surface or ledge 4, and a rise 5. A glazing strip 6 is provided along the bottom edge of the pane 2 and, in crosssection presents a first rear limb 7 abutting the rise 5 and extending upwardly beyond the surface 3. The limb 7 has a reverse-bend portion 8 which overlies and engages the surface 3; a continuous or a series of intermittent fixing blocks 9 being nailed or screwed to surface 3 within the portion 8 as shown. A second forwardly and downwardly sloping limb 10 overlies the ledge 4 and extends as shown and has a first downturned end 11.

Legs 12 and 13 depend from the limb 10 and rest on the ledge 4 in a bed of butyl compound, putty or mastic. A third limb 14 is spaced above the limb 10 and rooted in the limb 7. The limb 14 extends beyond the limb 10 and terminates in a second down-turned end 15 which extends below the bottom of end 11 as shown. Limb 10 extends beyond end 11 to merge with end 15 as shown and drain openings 19 are provided as shown. A resilient ramp 16 is spaced forwardly of the limb 7 and is rooted in the limb 14. The ramp 16 extends to adjacent the limb 7 near the transition of the latter into its reverse-bend 8 to provide a gap for receiving the pane 2. An upper part of the limb 7, a rear part of the limb 14 and the ramp 16 together define a channel having drain openings 17 in the rear part of the limb 14. The limbs 10 and 14 define a condensation duct communicating with the channel via the openings 17. Spacer clips 18 are spaced from one another along the bottom edge of the pane 2, the clips 18 being accommodated in the channel and serving to space the pane 2 from abutment with the upper part of the limb 7 and the rear part of the limb 14. Spacer clips 18 shown in Figs. 1 and 2 are of a "J" shape and are fitted to the pane 2 prior to the pane 2 being located into the channel. In Figs. 3, 4A and 4B, clips 1 8A of modified shape are used having a bottom extension, these clips when in place on a pane of glass being fitted into the channel as shown in Figs. 4A and 4B.

In Fig. 2 the wooden window frame 1 is replaced by a steel one and the bottom member 19 thereof has the equivalient surfaces 3, 4 and 5. Here however, the rearward extend of the surface 3 is sufficiently small for the portion 8 to engage behind the surface 3.

Otherwise, the assembly is substantially the same as shown in Fig. 1 and corresponding reference numerals have been included in Fig.

2.

A compression wedge seal 20 is fitted between the ramp 16 and pane 2, as shown in Figs. 3 and 4B. Stop ends 22 can be fitted to each end of the glazing strip 6 as shown to close off each end of the channel and therefore prevent condensation leaking away into the wooden frame at those points.

In use, any condensation that may occur on the inside face of the pane 2 can run down the pane in an uninterrupted manner to its bottom edge so as to collect in the channel, drain through the openings 17 into the duct and then drip from, through openings 19. The depth of end 15 prevents wind blowing condensate back into the duct and channel.

At each side and top of the pane 2, a butyl compound, putty or mastic 21 is located as shown in Fig. 3 and on the outside is puttied as shown at 23.

Claims (4)

1. A window glazing assembly comprising a window frame, a pane of glazing material therein and a glazing strip along the bottom edge of the pane, said frame having on its bottom frame member a forwardly and downwardly directed stepped portion providing a raised rear inner surround transverse to the pane, said glazing strip in cross-section presenting a first rear limb abutting the rise to the step and extending upwardly of the frame beyond the rear inner surround surface, said rear limb having a reverse-bend portion which overlies and engages or engages behind said surface, a second forwardly and downwardly sloping limb overlying the lower forward inner surround, a third limb spaced above the second limb, rooted in the first limb and a resilient ramp spaced forwardly of the first limb, rooted in the third limb and extending to adjacent said first limb near the transition of the latter into its reverse-bend to provide a gap for receiving the pane, an upper part of the first limb, a rear part of the third limb and the ramp together defining a channel having drain openings in the rear part of the third limb, and the second and third limbs defining a condensation duct communicating with the channel via said openings, and a series of spacer clips spaced from one another along the bottom edge of the pane, the clips being accommodated in the channel and serving to space the pane from abutment with the upper part of the first limb and the rear part of the third limb.

2. Assembly as claimed in Claim 1, wherein the second limb extends beyond said lower forward surround and has a first downturned end, and the third limb extends beyond the second limb and terminates in a second downturned end, the second limb extending beyond said first end to merge with said second downturned end.

3. Assembly as claimed in Claim 2, wherein drain openings are provided in the portion of the second limb between the first and second downturned ends.

4. A window glazing assembly substantially as hereinbefore described with reference to the accompanying drawings.