GB2163809A

GB2163809A - Cockspur fastener

Info

Publication number: GB2163809A
Application number: GB08521658A
Authority: GB
Inventors: Paul Stephen White
Original assignee: Gkn Crompton Ltd
Current assignee: Crompton Ltd
Priority date: 1984-08-31
Filing date: 1985-08-30
Publication date: 1986-03-05
Also published as: GB2163809B; GB8521658D0; GB8422044D0

Abstract

The fastener comprises a support member 10 for fitting to the sash frame of a window and an arm 13, 14, 15 pivotable on the support member and engageable with a retaining member on the fixed frame of the window. The arm is in two main parts, namely a base member 13 which is pivotally connected to the support member and a cover member 15 secured to the base member, such that a range of fasteners of different appearance or function, e.g. for windows of different frame material, can be obtained by substituting different cover members with a common base member. The base member is preferably a plastics moulding and the cover member a metal extrusion or die-casting. A lock 20 secures the arm in the fastened position. <IMAGE>

Description

SPECIFICATION Window fastener This invention relates to a fastener suitable for use with pivotally opening sash windows.

There are many different designs of sash windows currently in use, and different frame materials are employed, i.e. timber, metal (alumiunium alloy), plastics (UPVC). These impose different requirements for window fasteners and a number of different designs of fastener may be required for functional reasons to suit different frame designs or materials, as well as for aesthetic reasons, it is the object of the present invention to provide a window fastener which enables such requirements to be met more economically than hitherto.

According to the invention, we provide a fastener for a pivotally opening sash window, comprising a support member adapted to be secured to a sash frame of the window and an arm pivotally movable on the support member and engageable with a retaining member on the fixed frame of the window when the window is closed, wherein said arm comprises a base member which is pivotally connected to said support member and a selected one of a number of different designs of cover member, secured to said base member.

Hitherto in general it has been the practice to construct the arm of a fastener as a one piece component requiring a totally different design for different applications. In a fastener according to the invention, however it is possible to use a common base member merely changing the cover member for different applications. A change of cover member can also be used to alter the appearance of the fastener if this is designed, and it would be within the scope of the invention for cover members of different colour or other finish, but of the same physical configuration, to be provided, constituting said different designs thereof. For a range of fasteners of different design, it can be significantly more economical to have to provide only a range of different cover members, instead of completely different arms as a whole.

These and other features of the invention will now be described by way of example with reference to the accompanying drawings, of which: Figure 1 is an exploded perspective view of a fastener according to the invention, showing alternative cover members; Figures 2 and 3 are perspective views of assembled fasteners with different cover members.

Referring firstly to Figure 1 of the drawings, the illustrated fastener comprises a support member 10, which is adapted to be fixed to a window sash frame by means such as screws extending through apertures 11 therein. The support member 10 has a pivot post 12 integral therewith and conveniently is a metal die casting.

The fastener further comprises an arm which is in two main parts namely a base member 13 and a cover member of which two alternative forms are shown at 14, 15. The base member 13 is pivotally secured to the support member 10 by the pivot post 12 extending through an aperture 16 in the base member, beyond which the pivot post extends through a pivot block 17 and washer 18 after which the free end of the pivot post is upset or spun over to secure the base member 13 to the support member 10. The base member 13 has an aperture 19 adapted to receive a cylinder lock 20 held therein by circlip 21. The cylinder lock is engageable with a recess 22 in support member. As an alternative to the provision of a cylinder lock for locking the fastener, the base member 13 may receive a grub screw 23 in threaded aperture 24, engageable with a recess 25 in support member 10.The bade member 13 may be a moulding of a plastics material, or may be a metal die casting.

Cover member 14 is in the form of an extrusion of an aluminium or other metal alloy, and has a cross sectional shape which interfits with the shape of base member 13 and pivot block 17 so that the cover member is fitted by being slidden onto the base member in the direction arrowed in the drawing.

Cover member 14 is illustrated as having an aperture 26 which receives the head of cylinder lock 20. Alternatively, if the fastener is lockable by grub screw 23 instead of the cylinder lock, cover member 14 would have an aperture 27 for access to the grub screw. It will of course be appreciated that a further possibility is for the fastener not to be lockable at all, in which case the cover member would have no such aperture.

One alternative form of cover member 15 is a die casting, and has a cockspur formation 28 for engagement with a retaining member on the fixed frame of the window. Cover member 15 is fitted to the base member 13 in a direction parallel to the pivotal axis thereof, and is retained by a self-tapping screw 29 engaging a boss, not visible in the drawing, at the rear of the cover member. As for the cover member 14, cover member 15 may be apertured for access to cylinder lock 20 or grub screw 23, as appropriate.

The assembled fastener with cover member 15 and a cylinder lock is shown in Figure 2. It is contemplated this version of the fastener is suitable for metal or plastics frames windows. The assembled fastener with cover member 14 and grub screw locking is shown in Figure 3. This is appropriate for timber framed windows. Suitable decorative finishes may be applied to the cover members as may be required, and a range of cover members of different finish but the same physical configuration may be provided.

1. A fastener for a pivotally opening sash window, comprising a support member adapted to be secured to a sash frame of the window and an arm pivotally movable on the support member and engageable with a retaining member on the fixed frame of the window when the window is closed, wherein said arm comprises a base member which is pivotally connected to said support member and a selected one of a number of different designs of cover member, secured to said base member.

2. A fastener according to Claim 1 wherein said

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Window fastener This invention relates to a fastener suitable for use with pivotally opening sash windows. There are many different designs of sash windows currently in use, and different frame materials are employed, i.e. timber, metal (alumiunium alloy), plastics (UPVC). These impose different requirements for window fasteners and a number of different designs of fastener may be required for functional reasons to suit different frame designs or materials, as well as for aesthetic reasons, it is the object of the present invention to provide a window fastener which enables such requirements to be met more economically than hitherto. According to the invention, we provide a fastener for a pivotally opening sash window, comprising a support member adapted to be secured to a sash frame of the window and an arm pivotally movable on the support member and engageable with a retaining member on the fixed frame of the window when the window is closed, wherein said arm comprises a base member which is pivotally connected to said support member and a selected one of a number of different designs of cover member, secured to said base member. Hitherto in general it has been the practice to construct the arm of a fastener as a one piece component requiring a totally different design for different applications. In a fastener according to the invention, however it is possible to use a common base member merely changing the cover member for different applications. A change of cover member can also be used to alter the appearance of the fastener if this is designed, and it would be within the scope of the invention for cover members of different colour or other finish, but of the same physical configuration, to be provided, constituting said different designs thereof. For a range of fasteners of different design, it can be significantly more economical to have to provide only a range of different cover members, instead of completely different arms as a whole. These and other features of the invention will now be described by way of example with reference to the accompanying drawings, of which: Figure 1 is an exploded perspective view of a fastener according to the invention, showing alternative cover members; Figures 2 and 3 are perspective views of assembled fasteners with different cover members. Referring firstly to Figure 1 of the drawings, the illustrated fastener comprises a support member 10, which is adapted to be fixed to a window sash frame by means such as screws extending through apertures 11 therein. The support member 10 has a pivot post 12 integral therewith and conveniently is a metal die casting. The fastener further comprises an arm which is in two main parts namely a base member 13 and a cover member of which two alternative forms are shown at 14, 15. The base member 13 is pivotally secured to the support member 10 by the pivot post 12 extending through an aperture 16 in the base member, beyond which the pivot post extends through a pivot block 17 and washer 18 after which the free end of the pivot post is upset or spun over to secure the base member 13 to the support member 10. The base member 13 has an aperture 19 adapted to receive a cylinder lock 20 held therein by circlip 21. The cylinder lock is engageable with a recess 22 in support member. As an alternative to the provision of a cylinder lock for locking the fastener, the base member 13 may receive a grub screw 23 in threaded aperture 24, engageable with a recess 25 in support member 10.The bade member 13 may be a moulding of a plastics material, or may be a metal die casting. Cover member 14 is in the form of an extrusion of an aluminium or other metal alloy, and has a cross sectional shape which interfits with the shape of base member 13 and pivot block 17 so that the cover member is fitted by being slidden onto the base member in the direction arrowed in the drawing. Cover member 14 is illustrated as having an aperture 26 which receives the head of cylinder lock 20. Alternatively, if the fastener is lockable by grub screw 23 instead of the cylinder lock, cover member 14 would have an aperture 27 for access to the grub screw. It will of course be appreciated that a further possibility is for the fastener not to be lockable at all, in which case the cover member would have no such aperture. One alternative form of cover member 15 is a die casting, and has a cockspur formation 28 for engagement with a retaining member on the fixed frame of the window. Cover member 15 is fitted to the base member 13 in a direction parallel to the pivotal axis thereof, and is retained by a self-tapping screw 29 engaging a boss, not visible in the drawing, at the rear of the cover member. As for the cover member 14, cover member 15 may be apertured for access to cylinder lock 20 or grub screw 23, as appropriate. The assembled fastener with cover member 15 and a cylinder lock is shown in Figure 2. It is contemplated this version of the fastener is suitable for metal or plastics frames windows. The assembled fastener with cover member 14 and grub screw locking is shown in Figure 3. This is appropriate for timber framed windows. Suitable decorative finishes may be applied to the cover members as may be required, and a range of cover members of different finish but the same physical configuration may be provided. CLAIMS

2. A fastener according to Claim 1 wherein said base member includes a formation adapted to receive locking means, selectively engageable with said support member.

3. A fastener according to Claim 1 or Claim 2 wherein said cover member includes a cockspur formation engageable with said retaining member.

4. A fastener according to Claim 1 or Claim 2 wherein said base member is engageable with said retaining member.

5. A fastener according to any one of the preceding claims wherein said base member is of a plastics material and said cover member of metal.

6. A fastener according to Claim 5 wherein said cover member is an extrusion, having a cross sectional shape which interfits with said basemember so as to be fitted thereto by sliding thereon.

7. A fastener according to Claim 5 wherein said cover member is a die casting.

8. A range of window fasteners for pivotally opening sash windows, each comprising a support member adapted to be secured to a sash frame of the window and pivotally supporting an arm engageable with a retaining member on the fixed frame of the window; said range comprising a common assembly of said support member and a base member of said arm, and a number of different designs of coversecurable to the base member of said common assembly.

9. A fastener substantially as hereinbefore described with reference to the accompanying drawings.