GB2353057A

GB2353057A - Sliding and pivoting window sash

Info

Publication number: GB2353057A
Application number: GB9915999A
Authority: GB
Inventors: William Boardman
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-07-09
Filing date: 1999-07-09
Publication date: 2001-02-14
Anticipated expiration: 2019-07-09
Also published as: GB9915999D0; GB2353057B

Abstract

A sliding sash window has preferably two window sashes (4, 5) which can slide within a frame. The vertical extremities of each of the sashes (4, 5) can be disconnected from the frame to allow the sashes (4, 5) to be pivoted inward for cleaning the outside surface of the glass pane.

Description

2353057 SLIDING SASH WINDOWS This invention relates to sliding sash

windows.

Such windows generally comprise a rectangular frame with two spaced vertical members called jambs, an upper horizontal member called the head and a lower horizontal member called the cill. The jambs define pairs of vertical slots facing one another in which glazed sashes are located. Each sash can slide vertically within its pair of slots and the slots in eachjamb are spaced such that, having regard to the thickness of the sash the sashes can slide past one another, i.e. to give an opening at both the top and bottom of the window when required. The sashes may be coupled via cables leading over pulley wheels to counterweights or springs which balance the weight on the sashes and make it easier to raise and lower them when required. When the window is closed, the top of the lowermost sash overlaps the bottom of the upperinost sash to give complete closure, and at this position, a fastening may be provided.

In order to clean their outside surfaces, especially in the case of highrise apartment blocks and offices, it is known for casement and top hinged windows to have a special hinge mechanism that makes the outside surface of the window accessible to a person inside the room.

An object of the invention is to provide a sliding sash window in which the outside surface of a sash is so accessible. Another object is to arrange for both sashes to be so accessible.

2 According to the invention, there is provided a sliding sash window comprising a frame in which there is located a sash able to be raised and lowered within the frame, the sash being located such that, at one position of the sash in the frame, a vertical extremity of the sash is disengageable from the frame to permit the sash to be swung inwardly away from the frame so that the outside surface of the sash becomes accessible for cleaning.

For a better understanding of the invention and to show how the same may be carried into effect, reference will now be made, by way of example, to the accompanying drawings, in which:

Figure I is a sectioned side view of a sliding sash window; and Figures 2 to 5 correspond to Figure I but show the sashes of the window at respective different positions.

The Figure I window comprises a rectangular frame having two spaced vertical jambs 1, an upper horizontal head 2, and a lower vertical cill 3.

Two glazed window sashes 4 and 5 are located in the frame with sash 4 normally being at the top and sash 5 at the bottom of the window when the window is closed. The sashes 4 and 5 each have short rectangular pins 6 which project from the sash sideways into engagement with matching elongate vertical slots or slideways formed in the respective jambs 2. The sash 4 has two pins 6, i.e. one near the bottom of each side of the sash, and these engage respective slots 7 near the front, i.e. at the outside of the 3 window of each jamb 1. Meanwhile, the sash 5 has four pins 6, i.e. one near the top and one near the bottom of each side of the sash, and these pins engage respective slots 8 near the back, i.e. at the inside of the window, of each jamb 1. The slots 7 and 8 are spaced one from another sufficiently so that the two sashes 4 and 5 can slide past one another.

Within the head 2 which is hollow and at each end of it, there is an arrangement (only one is visible) of two pulley wheels 9 one above each sash. The sashes are coupled one to another by two cables 10 (only one visible), each cable being engaged over the two pulley wheels of a respective arrangement thereof. The ends of the cables 10 are connected to the lower ends of the sides of each sash. Because of the coupling via cables 10, when sash 5 is raised, sash 4 descends or, if sash 5 is lowered, sash 4 is raised. The weight of each sash is counterbalanced by the other.

Each rectangular pin 6 has its longest side aligned with the corresponding slot 7 or 8. When the sash 5 is at one particular position, at the bottom of its movement in the illustrated case, the lowermost pins 6 of the sash 5 are aligned with places where the slots 8 widen out to define circular relieved areas 11. Meanwhile, the upper pins 6 of sash 5 are aligned with positions 12 in the slots 8 where there are openings (not shown) to permit the upper pins to come out of the slots 8 and enable the top of the sash 5 to be swung inwards and downwards until the sash is horizontal, this being permitted also by the lower pins 6 of sash 5 being at the relieved areas 11. This allows cleaning of the outside surface of the sash. This is shown best in figure 2.

4 In order to clean the outside of the sash 4, the sash 5 is swung back into engagement with slots 8 as shown in figure 3, and then the sash 5 is raised to its top position as shown in Figure 4, the sash 4 meanwhile descending to its bottom position. The pin 6 at each side of sash 4 is now at a relieved position 13 at the bottom of slot 7, while the upper pin at each side of sash 5 is at a similarly relieved position 14 at the top of slot 8. Meanwhile, the lower pin 6 at each side of sash 5 becomes aligned with the positions 12.

As a result, as shown Figure 5, the bottom of the sash 5 may be swung inwards a little just to clear the top of the sash 4, and then the sash 4 can be swung inwards and downwards to the horizontal so that its outer surface is exposed and easily accessible for cleaning.

The sashes 4 and 5 do not have to be counterbalanced one to another but instead could be counterbalanced by respective suspended weights or springs, located in the jambs 1.

The openings at positions 12 could be permanent or arranged to be closed by disengageable closure members (not shown) which normally close off the openings but which can be disengaged when cleaning is to be carried out. As a further possibility, the pins 6 at the top and bottom of the sash 5 could be arranged to be disengageable from the slots 8, for example by being normally sprung outwards into engagement with the slots 8 but being able to be drawn back out of the slots manually.

The pins 6 do not have to be rectangular, instead they could be round for example and then the circular relieved areas 11 may not be needed.

Separate means (not shown), for example suitably shaped portions of the front of the jambs that overlap the front of the sash 4, may be provided to locate the sash 4 and prevent the top of it from tending to swing out at the front of the window.

Instead of the sash 5 being swung inwards to give clearance for the sash 4 to swing down to its cleaning position as shown in Figure 5, there could be provided additional clearance above the sash S so that this sash can be lifted vertically an extra amount until its lower edge just clears the top of sash 4.

Claims

6 CLAIMS

1. A sliding sash window comprising a frame in which there is located a sash able to be raised and lowered within the frame, the sash being located such that, at one position of the sash in the frame, a vertical extremity of the sash is disengageable from the frame to permit the sash to be swung inwardly away from the frame so that the outside surface of the sash becomes accessible for cleaning.

2. A window according to Claim 1, comprising two sliding sashes in said frame, each being moveable to said position in the frame for a vertical extremity of either sash to be disengageable from the frame to permit that sash to be swung inwardly away from the frame so that the outside surface of the sash becomes accessible for cleaning.

3. A window according to Claim 2, wherein one sash is moveable to said position I and the other is moveable to clear the said one sash to permit its vertical extremity to be disengaged from the frame as aforesaid.

4. A sliding sash window substantially as hereinbefore described with reference to the accompanying drawings.

ECD/JW/P02629GB July 8, 1999