GB2182385A

GB2182385A - Modified window stay

Info

Publication number: GB2182385A
Application number: GB08625826A
Authority: GB
Inventors: John Edward Buckley; Michael John Fairless
Original assignee: Securistyle Ltd
Current assignee: Securistyle Ltd
Priority date: 1985-10-30
Filing date: 1986-10-29
Publication date: 1987-05-13
Also published as: GB8625826D0; GB8526737D0; GB2182386A; GB8625827D0

Abstract

A window stay has a track 10 on which is a slider 14. The edges of the track are enlarged at 11 and 12 and the slider is wrapped around the edges to embrace them so that it slides clear of the base of the track thus enabling screws to be put through the base without interfering with the passage of the slider. <IMAGE>

Description

SPECIFICATION Modified window stay This invention relates to a friction supporting stay, particularly for windows, of the kind which comprises a track, a slider movable along the track, a strut pivotally connected to the track, a brace pivotally connected between the slider and the strut, a link pivotally connected to the slider, and a bar pivotally connected to the link and to the strut, the arrangement being such that as the slider moves along the track the bar can swing from a position overlying the track to a position where it is angled with respect to the track.

Such a friction supporting stay is well known and will be referred to as being "of the kind described". One example is described and shown in our published UK patent 2081803B.

These window stays have been satisfactory in the past but with the need to support heavier windows, very often double-glazed, and larger windows, there is a need to provide a more robust type of stay capable of carrying heavier loads. It is desirable that the track should be capable of being fixed by means of screws or other fixings at a number of points along its length and with the existing type of stay this is difficult because the slider engages in the track and the track has to be kept clear of projecting screw heads or other irregularities which would interfere with the free run of the slider.

In accordance with the present invention, in a friction supporting stay of the kind described above, the slider is arranged to embrace the track externally, preferably by forming the track with enlarged side portions or edge strips, e.g. in section as a dumb-bell shape, and having the sides of the slider shaped to engage the side portions or enlarged edge strips. Thus the slider is now clear of the track and will not interfere with any fixing screws that may be placed in the path of the slider.

If a friction strip or pad such as a nylon strip or pad is employed between the slider and the track it may be in the form of a short strip retained between the slider and the track or in the form of an extended strip fixed on the track throughout a major proportion of its length. The nylon strip may be retained in place within the slider, above the fixing screws, the nylon strip being engaged by one or more grub screws in the slider.

The grub screw for adjusting the pressure on the nylon strip or pad may be incorporated in a rivet used to hinge the brace to the slider. Alternatively or in addition a grub screw may be incorporated in a rivet used to hinge a link to the slider.

From another aspect the invention comprises a friction stay of the kind described above in which the brace and the strut and optionally also the bar and link are made of metal which is of thicker section than hitherto but to enable the stay to operate portions of the brace strut are cut away where, during hinging action, they overlap. Where the portions are cut away an edge wall portion may be left upstanding to strengthen the brace and strut.

Wear pads e.g. of nylon may be incorporated in rubbing surfaces of the brace, strut and bar to prevent undue wear in use.

In the accompanying drawings: Figure 1 is an elevation of a modified friction supporting stay embodying the present invention; Figure 2 is a section on line 2-2 of Fig. 1; Figure 3 is a section on 3-3 of Fig. 1; Figures 4 and 5 are respectively plan view and side elevation of a strut suitable for use with a right hand stay; Figures 6 and 7 are respectively plan and elevation of a brace which might be used with the left hand stay; Figure 8 shows a modified rivet for use with the stay shown in Fig. 1; and Figures 9 and 10 are similar to Figs. 4 and 5 but show a modified strut.

In Fig. 1 the strut shown comprises a track 10 which is of the cross-sectional form iiius- trated in Figs. 2 and 3, having enlarged side portions 11,12. Alternatively, the track 10 may be of dumb-bell section. Along the track are a series of fixing holes 13 at spaced intervals to enable a large number of fixings to be used with this form of track.

A slider 14 is mounted on the track and as seen in Fig. 3 the sides 15 of the slider are shaped to embrace the enlarged side portions 11 and 12 of the track so that the slider is retained on the track by this external fixing. It will be seen that the slider is of inverted Ushaped section with the free ends of the arms of the U bent inwardly at right angles to the arms so as to embrace the side portions or edge strips on three sides. Alternatively, the track may be of dumb-bell section and the slider may have sides curved to embrace the enlarged side portions of the dumb-bell section track.

A nylon strip 16 is retained within the slider above the track so as to move with the slider.

The stay also comprises a strut 18 pivoted at 19 to a place 1 9a fixed to the track and a brace 20 pivoted by means of a rivet 21 to the slider 14. The strut 18 is also pivoted by a rivet 22 to a bar 23 which in turn is pivoted by a rivet 24 to a link 25. The link 25 is pivoted by a rivet 26 to the slider 14.

Rivets 21 and 26 are each formed with a threaded central bore in which are captive grub screws 29,30. These grub screws may be used to adjust the pressure exerted on the nylon strip 16 thus controlling the degree of frictional drag on the slider 14. The nylon strip can be held in place within the slider by adhesive or mechanical means, such as clips.

The brace 20 and strut 18 are of thicker material than has been used previously but are cut away respectively at 31 and 32 leaving upstanding walls 33 and 34 (see Figs. 4 to 7) to allow for the overlapping of the strut and brace as the stay is moved to its closed position i.e. the position in which the bar strut and brace are all in line with the track. Thus the strut and brace are stronger than have been used hitherto but at the same time are so designed that the total thickness of the stay is kept to a minimum.

Because the brace and strut include cut away portions it is necessary to have right handed and left handed stays with right handed and left handed braces and struts.

Figs. 4 and 5 show a strut 18 for a right hand stay whereas Figs. 6 and 7 show a brace 20 for a left hand stay.

Alternatively the upstanding walls 33 and 34 may be omitted as in the form of strut 18a shown in Figs. 9 and 10 with cut-away portion 32a.

The brace 20 and strut 18 may be joined by a modified form of rivet 35 which has a flat head 36 which fits flush into a corresponding recess in the brace 20 and an extension 37 which passes through an aperture in the strut 18, the head of the extension being peened over at 38 to lock the rivet in position. The rivet allows relative movement between the brace and the strut but because the head 62 is flush with the brace 20 it does not interfere with the track 10 when the stay is in its closed position.

To prevent wear of the rubbing surfaces of the brace 20, strut 18 and bar 23, nylon pads 39,40 are inset into the brace 20 so that their exposed surfaces lie just above the adjacent surface of the brace. Thus the nylon pads 39,40 engage rubbing surfaces of the adjacent strut 18 and bar 23 during opening and closing movements of the stay.

Claims

1. A friction supporting stay of the kind described and in which the slider is arranged to embrace the track externally, by forming the track with enlarged side portions or edge strips, and having the sides of the slider shaped to engage the side portions or enlarged edge strips so that the slider is clear of the track and will not interfere with any fixing screws that may be placed in the path of the slider.

2. A friction supporting stay according to claim 1 and in which the slider is of inverted U-shaped section with the free ends of the arms of the U bent inwardly at right angles to the arms so as to embrace the side portions or edge strips on three sides.

3. A friction supporting stay according to claim 1 and in which the track is of dumb-bell section and the slider has sides curved to embrace the enlarged side portions of the dumbbell section track.

4. A friction supporting stay according to any preceding claim and in which a friction strip or pad is employed between the slider and the track in the form of a short strip retained between the slider and the track, or in the form of an extended strip fixed on the track throughout a mojor proportion of its length.

5. A friction supporting stay according to claim 4 and in which the nylon strip is retained in place on top of the fixing screws, the nylon strip being engaged by one or more grub screws in the slider.

6. A friction supporting stay according to claim 6 and in which one of the grub screws for adjusting the pressure on the friction strip is incorporated in a rivet used to hinge the brace to the slider.

7. A friction supporting stay according to claim 6 or claim 7 and in which one of the grub screws is incorporated in a rivet used to hinge a link to the slider.

8. A friction supporting stay according to any preceding claim and in which the brace and the strut and optionally also the bar and link are made of thick metal in which, to enable the stay to operate, portions of the brace strut are cut away where, during hinging action, they overlap.

9. A friction supporting stay according to claim 9 and in which where the portions are cut away an edge wall portion is left upstanding to strengthen the brace and strut.

10. A friction supporting stay according to any preceding claim and in which wear pads are incorporated in rubbing surfaces of the brace, strut and bar to prevent undue wear in use.

11. A friction supporting stay according to claim 12 and in which the wear pads are of nylon.

12. A friction supporting stay substantially as hereinbefore particularly described and as illustrated in the accompanying drawings.