GB2071757A

GB2071757A - Window Stays

Info

Publication number: GB2071757A
Application number: GB8104469A
Authority: GB
Original assignee: WATERGLADE PRODUCTS UK Ltd
Current assignee: WATERGLADE PRODUCTS UK Ltd
Priority date: 1980-03-12
Filing date: 1981-02-12
Publication date: 1981-09-23
Also published as: GB2071757B

Abstract

A window stay of the type described wherein at least one pivotal connection (B) between an arm (12) and a mounting plate (11) comprises an aperture (20b) in the arm (12); a boss (23) surrounding the aperture (20b) and formed integrally with, and projecting from one side (24) of, the arm (12); a recess (26) formed in the other side (22) of the arm (12) to the boss (23) and surrounding the aperture (20b); a rivet (36) having a head (38) and a shank (37); the shank of the rivet (36) extending through an aperture (17) in the mounting plate (11) and said aperture (20b) in the arm (12); the unheaded end of the shank (37) being displaced outwardly and received in said recess (26); and there being a wear resistant friction element (33) engaged between the head (38) of the rivet (36) and the mounting plate (11) and/or the mounting plate (11) and the boss (23). <IMAGE>

Description

SPECIFICATION Window or Like Stays This invention relates to a stay of the type, hereinafter referred to as "the type described", for adjustable mounting of a window sash or the like relative to a window frame or the like and comprising a frame mounting plate, two arms of different lengths, a pivotal connection between one end of each arm and the frame mounting plate, a sash mounting plate, a pivotal connection between the other end of each arm and the sash mounting plate and wherein at least some of the pivotal connections provide frictional resistance to relative rotation between the arm and the associate mounting plate whereby to support the sash or the like, in use, at any desired position.

The invention has been particularly devised for use to adjustably mount a window sash relative to a window frame and in particular where the outer perimeter of the sash overiaps the inner perimeter of the window frame so that it is necessary for the sash to be moved away from the frame at the beginning of opening the sash. However, a stay according to the invention may be used for other applications where it is desired to adjustably mount a member relative to a frame. The member may for example, comprise any form of closure for the aperture defined by the frame and may, for example, comprise a shutter or a grill.

An object of the invention is to provide a stay of the type described which has an improved pivotal connection between an arm and a mounting plate.

According to one aspect of the invention we provide a stay of the type described wherein at least one pivotal connection between an arm and a mounting plate comprises an aperture in the arm; a boss surrounding the aperture and formed integrally with, and projecting from one side of, the arm; a recess formed in the other side of the arm to the boss and surrounding the aperture; a rivet having a head and a shank; the shank of the rivet extending through an aperture in the mounting plate and said aperture in the arm; the unheaded end of the shank being displaced outwardly and received in said recess; and there being a wear resistant frictionelement engaged between the head of the rivet and the mounting plate and/or the mounting plate and the boss.

Preferably, the pivotal connection between the arm and the other mounting plate comprises a further aperture in the arm; a further boss surrounding said aperture and formed integrally with, and projecting from said other side of, the arm; a recess formed in said one side of the arm and surrounding said further aperture; a further rivet having a head and a shank; the shank of the further rivet extending through an aperture in the other mounting plate and said further aperture in the arm; the unheaded end of the shank being displaced outwardly and received in said further recess; and there being a wear resistant friction element engaged between the head of the further rivet and the other mounting plate and/or the other mounting plate and the further boss.

Further preferably, at least the pivotal connection between the other arm and said one mounting plate is as defined in the penultimate paragraph.

Still further preferably, the pivotal connection between said other arm and said other mounting plate is as defined in the penultimate paragraph.

In the or each pivotal connection the wear resistant friction element may comprise an insert having a tubular shank and an outwardly extending flange at one end of the shank, the flange being engaged between the head of the rivet and the mounting plate and the shank extending through the aperture on the plate and surrounding the rivet shank, and a washer mounted on the rivet shank and engaged between the mounting plate and the arm.

The flange of the insert may have a rib on the opposite side of the shank, the rib surrounding the head of the rivet.

The washer may have a generally planar one surface and the other surface may provide a recess of a shape to conform to the shape of the part of the boss engaged thereby.

The rivet may have a bore extending inwardly from the unheaded end of the shank for a part of its length to facilitate displacement of the unheaded end in said recess in the arm.

The mounting plate or plates may be of generally channel configuration, the head of the or each rivet being received in the channel so as not to project beyond the free ends of the limbs of the channel configuration.

If desired, the plate, or one of the plates, may have a protrusion adjacent a pivotal connection which abuts the associated arm as the window is opened to limit the rotation between the mounting plate and the associated arm.

The recess in the arm may have a non-circular wall configuratoin to provide an interference engagement with the displaced end of the rivet to prevent relative rotation between the rivet and the arm.

According to a second aspect of the invention I provide a stay of the type described wherein at least one pivotal connection comprises an aperture formed in an arm and in a mounting plate; a rivet having a shank and a head, the shank of the rivet extending through said apertures; the head engaging the arm or the mounting plate; a recess, formed in the surface of the mounting plate or arm respectively, surrounding the aperture and the recess having a non-circular wall configuration; the unheaded end of the rivet being deformed outwardly so as to provide an interference engagement with the wall of the recess thereby preventing rotation of the rivet relative to the wall of the recess.

A wear resistant friction element may be engaged between the head of the rivet and the arm or mounting plate and/or between the arm and the mounting plate.

In both the first and second aspects of the invention said non-circular configuration may be polygonal such as octagonal and the rivet may be splayed outwardly into four tongues in engagement with alternate ones of the flats of said octagon.

A window stay embodying the invention will now be described In more detail by way of example, with reference to the accompanying drawings wherein: Figure 1 is a side view of a stay embodying the invention; Figure 2 is an exploded section on the line 22 of Figure 1: and Figure 3 is a fragmentary side elevation showing part of Figure 1 to an enlarged scale.

Referring to the drawings, a stay for mounting a window sash in a window frame is illustrated. In practice, two such stays are provided, one on one side of the sash and frame and the other on the opposite side of the sash and frame. Since both stays are identical, only one will be described hereinafter.

As can be seen from Figure 1, each stay comprises a frame mounting plate 10 and a sash mounting plate 11 with two arms of different lengths 12, 1 3 pivotally connected to the plates 10 and 11.

As shown in Figure 2, each mounting plate 10, 11 is of channel section and is made as an extrusion of suitable aluminium alloy. The mounting plates 10, 11 are provided with apertures 14 to receive fastening means such as screws by which the plates can be fixed to their associated frame or sash. A pressing operation is performed on each mounting plate in the region of each aperture 14 to form a countersink 15 on one side of the plate and a frusto-conical projection 1 6 on the other side of the plate.The countersink accommodates, of course, a countersunk head on the fastening whilst the projection prevents deformation of the mounting plate when the fastener is tightened as a result of the end of the projection engaging the frame or sash when the fastener is tightened, thus preventing movement of the web 1 7 of the channel section plate towards the frame or sash.

The pivotal connection between arm 12, 13 and the mounting plates 10, 11 is identical at each of the four locations 'A', 'B', 'C', 'D' of the pivotal connection.

Figure 2 is a section showing the pivotal connection at location 'A' assembled and the pivotal connection at location 'B' expioded. It will be appreciated that the pivotal connections at 'D' and 'C' are identical to those at 'A' and 'B'.

Referring now to Figure 2, an aperture 20a is formed adjacent one end of the arm 12 whilst a similar aperture 20b is formed adjacent the other end of the arm 12. A pressing operation is then performed cn the arm 12 so as to form a boss 21 projecting from one side 22 of the arm and surrounding the aperture 20a and a boss 23 projecting from the other side 24 of the arm surrounding the aperture 20b. In addition, a recess 25 is formed in said other side 24 of the arm surrounding the aperture 20a whilst a similar recess 26 is formed in said one side 22 of the arm surrounding the other aperture 20b. As best shown in Figure 3, each recess has a peripheral wall 27 of octagonal configuration.

An aperture 30 is formed in the frame mounting plate 10 and a similar aperture 31 is formed in the sash mounting plate 11. An insert 33 made of Nylon or other wear resistant friction material and comprising a tubular shank 34 and an outwardly extending generally annular flange 35 having a circumferential rib 35a, the flange 35 and rib 35a being formed with two diametrically opposite flats, is located within each aperture 30, 31 and a rivet 36 is then inserted through the tubular shank 34. The rivet 36 comprises a cylindrical shank 37 having at one end a head 38 whilst at the other end the shank is provided with a blind bore 39 to facilitate displacement of the end of the rivet.The tubular shank 34 prevents contact between the rivet 36 and the wall of the aperture 30, 31 and the flats on the flange 35 and rib 35a engage the sides of the channel section of the associated base plate to thus prevent rotation of the insert 33 relative to the base plate, during opening and closing of the window sash, thereby avoiding any wear between the insert and the relatively smali area of the base plate in which it is in contact.

A friction pad or.washer 40 is then mounted on the shank of the rivet. The washer 40 has a central opening 41 and one surface 42 of annular configuration. The other surface 43 is formed with a recess 44 of a configuration corresponding to that of the end of the boss 21, 23 with which it is to be engaged.

The washer 40 is mounted on the rivet 36 with the annular surface engaging the planar surface of the associated mounting plates 1 0, 11 so that the associated boss 21,23 is received within the recess 44.

The unheaded end of the shank 37 of the rivet 36 is then upset so as to be splayed outwardly to form four radially extending tongues 45, the end surfaces 46 of which engage alternate ones of the flats of the octagonal wall 27 thereby preventing rotation of the rivet relative to the arm 12.

It will be appreciated that the rivet 36 in the exploded view is shown prior to being splayed outwardly, whereas the assembled view shows a rivet splayed outwardly.

Since the arm 12 is substantially shorter than the arm 13, in the present case 2.75 times shorter, the sash carried by the plates 11 a: e caused to swing outwardly during initial opening of the window so that it clears the frame during initial opening.

Because the bosses 21,23 are pressed out of opposite sides of the arm 12 the necessary "offset" required to occupy the cavity between the window frame and the sash is provided.

Pressure is applied to the opposed surfaces of the plates 10, 11 by the annular flange 35 of the insert 33 and the annular surface 42 of the friction pad 40 as a result of upsetting of the rivet and ensures that the desired amount of frictional resistance to rotation is provided to ensure that the window can be retained in any desired position.

It is important to note that the shank of the rivet 36 is solid for a proportion of its length which is received within the boss of the plate 12 and thus upsetting of the end of the rivet does not cause any displacement of the axis of the rivet relative to the axis of the aperture 20a or 20b in which it is received so that there is no error introduced into the axis of pivot relative to the associated mounting plate. It is important that the axes of pivot are maintained accurately so as to retain the required amount of "pull-in" of the sash to ensure that it tightly engages with the window frame when the window is closed at both the top and the bottom of the window sash.

The rivet may be made from stainless steel to ensure reliability in service.

It may be further noted that the upset end of the rivet is visible in service and so any deterioration of the connection during service can be readily observed and hence undetectable failure avoided.

The mounting plate 10 may be provided with a projecting portion 8 which is pressed outwardly of the mounting plate 10 during the countersink pressing operation. This portion 8 comprises a tongue 9 having two inclined edges, one of which 7 abuts the arm 12 when the window is opened.

In this example, the edge 7 permits the window to open a full 1150 although if it is desired to prevent the window opening beyond a different extent, the tongue 9 can be adapted accordingly.

Claims

1. A stay of the type described wherein at least one pivotal connection between an arm and a mounting plate comprises an aperture in the arm; a boss surrounding the aperture and formed integrally with, and projecting from one side of, the arm; a recess formed in the other side of the arm to the boss and surrounding the aperture; a rivet having a head and a shank; the shank of the rivet extending through an aperture in the mounting plate and said aperture in the arm; the unheaded end of the shank being displaced outwardly and received in said recess; and there being a wear resistant friction element engaged between the head of the rivet and the mounting plate and/or the mounting plate and the boss.

2. A stay according to Claim 1 wherein the pivotal connection between the arm and the other mounting plate comprises a further aperture in the arm; a further boss surrounding said aperture and formed integrally with, and projecting from said other side of, the arm; a recess formed in said one side of the arm and surrounding said further aperture: a further rivet having a head and a shank; the shank of the further rivet extending through an aperture in the other mounting plate and said further aperture in the arm; the unheaded end of the shank being displaced outwardly and received in said further recess; and there being a wear resistant friction element engaged between the head of the further rivet and the other mounting plate and/or the other mounting plate and the further boss.

3. A stay according to Claim 1, or Claim 2 wherein at least the pivotal connection between the other arm and said one mounting plate comprises a pivotal connection as defined in Claim 1.

4. A stay according to Claim 3 wherein the pivotal connection between said other arm and said other mounting plate comprises a pivotal connection as defined in Claim 2.

5. A stay according to any one of the preceding claims wherein in the or each pivotal connection the wear resistant friction element comprises an insert having a tubular shank and an outwardly extending flange at one end of the shank, the flange being engaged between the head of the rivet and the mounting plate and the shank extending through the aperture in the plate and surrounding the rivet shank, and a washer mounted on the rivet shank and engaged between the mounting plate and the arm.

6. A stay according to Claim 5 wherein the flange on the insert has a rib on the opposite side to the shank, the rib surrounding the head of the rivet.

7. A stay according to Claim 5 or Claim 6 wherein the washer has a generally planar one surface and the other surface provides a recess of a shape to conform to the shape of the part of the boss engaged thereby.

8. A stay according to any one of the preceding claims wherein the or each rivet has a bore extendingly inwardiy from the unheaded end of the shank for a part of its length to facilitate displacement of the unheaded end in said recess in the or the associated arm.

9. A stay according to any one of the preceding claims wherein the mounting plate or plates is or are of generally channel configuration, the head of the or each rivet being received in the channel so as not to project beyond the free ends of the limbs of the channel configuration.

10. A stay according to any one of the preceding claims wherein the mounting plate or one of the mounting plates has a protrusion adjacent a pivotal connection which abuts the associated arm as the window is opened to limit the rotation between the mounting plate and the associated arm.

11. A stay according to any one of the preceding claims wherein the recess in the or each arm has a non-circular wall configuration to provide an interference engagement with the displaced end of the associated rivet to prevent relative rotation between the rivet and the arm.

1 2. A stay of the type described wherein at least one pivotal connection comprises an aperture formed in an arm and in a mounting plate; a rivet having a shank and a head, the shank of the rivet extending through said apertures; the head engaging the arm or the mounting plate; a recess, formed in the surface of the mounting plate or arm respectively, surrounding the aperture and the recess having a non-circular wall configuration; the unheaded end of the rivet being deformed outwardly so as to provide an interference engagement with the wall of the recess thereby preventing rotation of the rivet relative to the wall of the recess.

13. A stay according to Claim 10 wherein a wear resistant friction element is engaged between the head of the rivet and the arm or mounting plate and/or between the arm and the mounting plate.

14. A stay according to any one of Claims 9 to 11 wherein said non-circular wall configuration is polygonal such as octagonal and the rivet is splayed outwardly into four tongues in engagement with alternate ones of the flats of said octagon.

1 5. A window stay substantially as hereinbefore described with reference to and as shown in the accompanying drawings.