AU613763B2

AU613763B2 - Timber sliding sash window

Info

Publication number: AU613763B2
Application number: AU36333/89A
Authority: AU
Inventors: Christopher Daniel Sassella
Original assignee: Dowell Australia Ltd
Current assignee: Dowell Windows Pty Ltd
Priority date: 1988-06-17
Filing date: 1989-06-13
Publication date: 1991-08-08
Anticipated expiration: 2009-06-13
Also published as: AU3633389A

Description

I

AUSTRALIA

PATENTS ACT 1952 COMPLETE SPECIFICATION COMPLETE SPECIFICATION Form

(ORIGINAL)

FOR OFFICE USE Short Title: Int. Cl: Application Number: Lodged: Complete Specification-Lodged: Accepted: Lapsed: Published: Priority: Related Art: 0 TO BE COMPLETED BY APPLICANT Name of Applicant: Address of Applicant: DOWELL AUSTRALIA LIMITED 6 ALBERT STREET, PRESTON 3072

VICTORIA

AUSTRALIA

Actual Inventor: Addres-, for Service: GRIFFITH HACK CO., 601 St. Kilda Road, Melbourne, Victoria 3004, Australia.

Complete Specification for the invention entitled: TIMBER SLIDING SASH WINDOW The following statement is a full description of this invention including the best method of performing it known to me:- 2 TIMBERI SLIDING SSH WINDOW -S 5 This invention relates to a timber sliding sash window and relates particularly but not exclusively to a timber double-hung sliding sash window.

V Hitherto it has been known to provide timber sliding sash windows but such have not bee popular owing to the difficulty in maintaining smooth sliding relationship of the sash window within the outer frame.

The sliding fit of the sash window within the frame cannot be made too loose otherwise the window will rattle in the wind. If it is made sufficiently tight to inhibit -I 3 rattling in the wind, then over a period of time as the wood warps or changes its condition due to weathering, the sash binds and jams within the frame.

The appearance of a wooden window is considered by some architects to be superior than metal windows which do not exhibit the above problems to the same extent but these often need painting and this, in turn, has caused the sash to jamb in the frame.

Accordingly, it is a problem to provide a wooden framed sliding sash window which is inhibited from rattling in the wind and which is inhibited from jamming owing to weathering of the wood and which can be painted without substantially impairing sliding of the sash.

Sb Therefore in accordance with a broad aspect of 15 the present invention there may be provided a timber sliding sash window comprising a wooden frame with a wooden sash window mounted therein, said wooden frame having tracks holding said wooden sash window in said wooden frame and along which said wooden sash window can slide, said tracks having resilient seal means extending o along their length for engaging with the wooden sash window, said resilient seal means being for inhibiting Go 0 rattling of said wooden sash window in said frame and for So0 compensating for any minor distortion of said wooden sash window or said wooden frame as a result of weathering and wherein said resilient seal means engages with front and 4 CO orear faces of the frame of the wooden sash window and 00 a wherein that portion of the front and rear faces that is o engaged by said resilient seal means is rebatted so that said resilient seal means contacts the rebatted portion to enable said resilient seal means to be substantially concealed between said wooden frame, said tracks and said wooden sash window so that if the window is painted, paint will be unlikely to contact said resilient seal means to impair sliding of the sash -7.

O''V i O2f< i 4 Most preferably the window is a double-hung sash window.

In order that the invention can be more clearly ascertained an example of a preferred embodimeint will now be described with reference to the accompanying drawings, wherein: Figure 1 is a front elevation of a typical wooden, double-hung sash window installation; Figure 2 is a sectional view of one side of the window frame taken along section line A-A of Figure 1; Figure 3 is a sectional view taken along ,o section line B-B of Figure 1; Figure 4 is an enlarged view showing the 4 section of part of the track used in the window; 15 Figure 5 is a sectional view showing another *9 a a part of the track; and 09oo 4oo0% Figure 6 is a perspective view showing a o 9 preferred seal for use with the track shown in Figures 4 and Referring firstly to Figure 1 there is shown a typical example of a wooden win~ow frame 1 which o incorporates the wooden framed double-hung sash window 3 which can slide within the window frame i. Various o0 panels 5 have been shown which may be glazed. De J Referring to Figure 2 there is shown a cross-sectional view along section line A-A of Figure 1 (I of one side edge of the wooden window frame i. A pair of Sao wooden framed sash windows 7 of the double-hung type are S oo provided to slide up and down within the wooden frame i.

Each of the sash windows 7 has its wooden window frame designated by numeral 9. Each of the wooden sash window 5 frames 9 are supported in the wooden window frame 1 within respective tracks 11 and 1.3 which are provided on each side of an opening in the wooden window frame 1.

Each of the tracks 11 and 13 are preferably of metal and preferably extend the full height of the opening in which the sash windows 7 are received. The sash windows 7 are of a height which approximately equals half the height of the opening in which the sash windows 7 are received.

With this arrangement, one of the windows can be positioned uppermost and the other positioned lowermost so that the opening will be fully closed by the sash windows 7. There is partial overlap of the lowermost portion of the upper window with the uppermost portion of the lower window to provide for suitable weather sealing of the window opening. Thus, apart from the use of the S t metal tracks 11 and 13, the arrangement is very similar to a conventional wooden double-hung sash window of the prior art.

Each of the tracks 11 and 13 contain resilient seal means 15 which engage with the wooden frame 9 of the sash windows 7 at each end thereof. As shown in this embodiment, the seal means 15 engages with the front to rear faces respectively of the wooden sash frame 9. A seal 15 is shown in perspective view in Figure 6 and here it can be seen that it has a backing web 17, as of plastics material such as polyethylene, with a plurality of upstanding bristles 19. The seal 15 extends continuously along the length of the track. The bristles 19 deflect somewhat to resiliently engage with the front and/or rear faces of the sash window 7. Thus, the window 7 can slide relatively easily by flexibly displacing the bristles 19 and by overcoming any resilient forces that are applied by the bristles 19 to the faces of the wooden frame 9. Thus, because the window is resiliently engaged and resiliently supported by the bristles L9 it will be inhibited from rattling in the wind. In addition, if the -I~CI I eq tt C C CC f C C S t~ C $t

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1-C 6 wooden frame 1 or the wooden sash window frame 9 should change its shape by a minor degree, as by weathering, then the bristles 19 will appropriately deform to accommodate any such change. A typical seal material is that known by the name POLYPILE or WEATHERSEAL by Schlegel of 44-48 Riverside Road, Chipping Norton, Sydney, 2170, Australia. Other seal material can be used if desired. The only requirement is that, in use, it will engage with the wooden window frame 9 to inhibit rattling and such that if there is any minor change in the wooden window frame 9 or the wooden window frame 1 by weathering then it can substantially be accommodated to maintain operation of the sash windows 7 within the frame 1.

The seal means 15 may alternatively conveniently comprise a synthetic plastics piping material which can deflect. Such piping material can be a plastics material extrusion. Alternatively such seal means 15 may comprise a foam-like plastics material or 20 other suitable material.

As shown in Figure 2, and in more detail in Figures 4 and 5, the preferred seal 15 has its backing 17 retained within seal cavities 21 formed in the tracks 11 and 13.

Figure 2 shows how each of the wooden window frames 9 are rebated where the seals 15 engage with the front and rear faces thereof. The rebating provides a stepped portion at each side edge of the wooden window frames 9. The arrangement is such that, in use, the seals 15 are substantially concealed between the frame 1 and the frame 9 so that if the windows are painted, paint will be unlikely to contact the resilient seals between the frame 1 and the frame 9.

A balance mechanism 23 of any known type is provided at the side edges of the wooden window frame 9 so as to balance the weight of each of the sash windows 7 7. One preferred balance mechanism 23 can comprise an elongate spring type balance mechanism with spiral flutes.

As shown in Figure 2 each of the tracks 11 and 13 is fastened by screws 25 to the wooden window frame 1.

The cross-sectional shape of the tracks 11 is generally shape and that of track 13 is generally shape as clearly shown in Figures 4 and 5. Here it can be seen that track 11 carries three seals 15 while t-ack 13 carries only a single seal 15. Each of the seals is carried in appropriate recesses. When tracks 11 and 13 are correctly positioned as shown, the third seal on track 11 co-operates with the seal on track 13 to provide for correct engagement of the seals 15 with the wooden frame 9 of a sash window 7 which is mounted for sliding within track 13. It is preferable to have track 11 of the shape shown with three seals 15 thereon and track 13 with only a single sea-l 15 thereon so as to aid disassembly of the sash window 7 from the frame 1. In this instance, the sash window 7 which slides within track 11 is moved so that the screws 25 can be withdrawn.

Thus, that particular sash window 7 can be removed whilst leaving the other sash window 7 in place. The other sash Vwindow 7 can be removed by then pulling it from track 13.

The particular arrangement of the tracks 11 and 13 as shown also assists assembly of the tracks and the sash windows 7 to the window frame 1.

Bubble seals 27 of a synthetic plastic material can be fitted into appropriate recesses in track 11 so as to provide weather sealing on the outermost face of the frame 1.

Figure 3 shows a cross-sectional view of the window taken along section line B-B of Figure 1. Here it can be seen that where the windows overlap in the middle, a seal 29 is provided in a recess 31 in one of the wooden 8 frames 9. The seal 29 extends completely across the window and inhibits wind blowing up between the windows 7.

An air pressure balance chamber 33 is provided by appropriate machining of the respective opposed faces of the window frames 9. The air balance chamber 33 attempts to remove the likelihood of wind blowing past the overlapped window frames 9.

A further seal 35 is provided in a recess 37 at the top of the frame 1. The seal 37 extends across the width of the window 7. The seal 35 can be of a resilient plastics material which deforms when engaged by the wooden window frame 9.

A further seal 39 is provided in a recess 41 at the bottom of the inside of the window. This assists sealing of the lowermost window 7 relative to the frame 1. An appropriate cover strip 43 is fastened to the lowermost portion of the frame 1 to extend completely thereacross. This carries the seal 39 which extends completely across the width of the window 7.

Figures 2 and 3 also show how the glazing 5 can be appropriately sealed relative to the wooden window frames 9 by providing a rebated groove 45 in the wooden window frame 9 so as to provide a substantial body of window sealant material 47 around the frame 9 and the glazing It can be appreciated from the foregoing description that it is now possible for a manufacturer of wooden window frames to make a single outer frame 1 and then subsequently alter production assembly procedures in the manufacturing process to receive the tracks 11 and 13 for the sliding sash type window construction or alternatively, to use the same window frame 1 for an awning sash window. This will minimize manufacturing ~~clzllrr~f~aa~oPMn**I*~icu~ril~u~rrx.r. -~iill;v~l uu-l I -9complications where dedicated frames I are hitherto required for sliding sash windows and for awning sash windows.

It will also be appreciated that with the present invention it is possible to modify an existing awning sash window to be a double-hung sash window simply by removing the awning sash window from its frame and by fitting the tracks 11 and 13 thereto, and the appropriate windows 7 within the tracks 11 and 13.

It should also be appreciated that the tracks 11 and 13 can be made as a single extrusion although it is preferable that they be of the type shown, i.e. a two piece extrusion, to permit easy fitting and subsequent removal from the frame 1.

As shown in Figure 2 a timber cover strip 49 can be fastened to hide the appearance of the track 11 if required. In some instances, a particularly aesthetically pleasing appearance can be obtained by having the wooden window frame 1 with highly contrasting metal tracks 11. One example of this is where the wooden window frames 1 are stained a dark timber colour whilst the tracks 11 and 13 are of a bright metal colour such as a gold or brass colour.

If suitable plastics material can be obtained the tracks 11 and 13 may be made of that material. It may be possible to provide a track of such material which has integrally moulded seals 15 thereon.

These and other modifications may be made without departing from the ambit of the invention, the nature of which is to be determined from the foregoing description.

Claims

1. A timber sliding sash window comprising ase enc wooden frame with a wooden sash window mounted therein, 6 said wooden frame having tracks holding said wooden sash V whE Iwindow in said wooden frame and along which said wooden me E sash window can slide, said tracks havi resilient seal crc means extending along their length for g ing with the wooden sash window, said resilient seal means being for re inhibiting rattling of said wooden sash window in said oti- frame and for compensating for any minor distortion of reE said wooden sash window or said wooden frame as a result bed of weathering and wherein said resilient seal means e dc engages with front and rear faces of the frame of the

7. wooden sash window and wherein that portion of the front sec and rear faces that is engaged by said resilient seal crc means is rebatted so that said resilient seal means thE contacts the rebatted portion to enable said resilient seal means to be substantially concealed between said whE wooden frame, said tracks and said wooden sash window so that if the window is painted, paint will be unlikely towi contact said resilient seal means to impair sliding of 9 Kthe sash l 2. A window as claimed in any one of the precedingas I V claims, wherein said window is a double hung sash window cla and wherein said tracks are fitted at the inner sides of bac v said wooden frame. o H3. A window as claimed in Claim 3, wherein the wit wi tracks at each inner side of said wooden frame are

11. comprised of two tracks one for one of the sash windowscl and one for the other. l 4. A window as claimed in Claim 4, wherein one of12 ref the two tracks has three resilient seal means thereon, one seal being for engaging a front face of one of the DA9 sash windows, the second seal being for engaging a rear DOV face of said one of the sash windows, and the third seal B being for engaging a front face of the other sash wdindow. GRI Fe] Att A window as claimed in Claim 5, wherein said V second track has a resilient seal means thereon for engaging the rear face of said other sash window. 6. A window as claimed in Claim 5 or Claim 6, wherein said track which has said three resilient seal means thereon is of generally shape in transverse i cross-section with one resilient seal means being on the inside face of one of the legs thereof, a second resilient seal means being on the inside face of the other leg at the same edge of said track as said one resilient seal means, and a third resilient seal means being on the outside face of said other leg at said same edge of said track. 7. A window as claimed in Claim 7, wherein said i second track is generally shaped in transverse :cross-section with a fourth resilient seal means being on the inside face of the foot thereof. 8. A window as claimed in Claim 7 or Claim 8, wherein each of said resilient seal means is received within appropriate recesses in said tracks. 9. A window as claimed in any one of the preceding claims, wherein said tracks have seal means for effecting i a seal against said wooden frame. A window as claimed in any one of the preceding A claims, wherein said resilient seal means comprises a backing web for engaging with said tracks and a plurality of upstanding bristles extending therefrom for engaging with said wooden sash window. S11. A window as claimed in any one of the preceding claims, wherein said tracks are of metal.

12. A window substantially as herein described with reference to the accompanying drawings. DATED THIS 27TH DAY OF MAY, 1991 DOWELL AUSTRALIA LIMITED By Its Patent Attorneys GRIFFITH HACK CO. Fellows Institute of Patent Attorneys of Australia. I R.1 "V" _A