GB2105780A - Improvements in friction stays for windows - Google Patents
Improvements in friction stays for windows Download PDFInfo
- Publication number
- GB2105780A GB2105780A GB08221544A GB8221544A GB2105780A GB 2105780 A GB2105780 A GB 2105780A GB 08221544 A GB08221544 A GB 08221544A GB 8221544 A GB8221544 A GB 8221544A GB 2105780 A GB2105780 A GB 2105780A
- Authority
- GB
- United Kingdom
- Prior art keywords
- arm
- friction
- stay
- pivot
- arms
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000000295 complement effect Effects 0.000 claims description 2
- 229910000838 Al alloy Inorganic materials 0.000 claims 1
- 238000001125 extrusion Methods 0.000 claims 1
- 230000005484 gravity Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000003068 static effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
- E05D15/00—Suspension arrangements for wings
- E05D15/40—Suspension arrangements for wings supported on arms movable in vertical planes
- E05D15/46—Suspension arrangements for wings supported on arms movable in vertical planes with two pairs of pivoted arms
- E05D15/466—Suspension arrangements for wings supported on arms movable in vertical planes with two pairs of pivoted arms specially adapted for windows
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2900/00—Application of doors, windows, wings or fittings thereof
- E05Y2900/10—Application of doors, windows, wings or fittings thereof for buildings or parts thereof
- E05Y2900/13—Type of wing
- E05Y2900/148—Windows
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wing Frames And Configurations (AREA)
Abstract
The invention relates to friction stays for windows of the kind having rivetted friction pivots 8 and two arms 5,6 of different length. To provide additional support and control of such stay for supporting a sash, a third intermediate arm 7 is provided. The third arm 7 is pivotally connected to the mounting plates 1 and 3 respectively for securing to a window frame and sash. The second and third arms 6,7 move substantially parallel, and in the fully opened position of the sash, the third arm provides support approaching the centre of gravity of the sash. Furthermore, the third arm is a restraint and can avoid the provision of separate stops or limits. <IMAGE>
Description
SPECIFICATION
Improvements in friction stays for windows
This invention concerns improvements in friction stays suitable for windows. In particular, this invention concerns friction stays which are of the kind herein specified as comprising two arms that are connected to respective mounting plates by friction pivot joints which permit restrained pivotal movement of the arms, the mounting plates of the stay being adapted and arranged respectively for mounting on a sash and for securing to the associated frame so that the sash is supported for frictionally restrained movement on and relative to the frame.
Such stays of the kind specified are conventionally used in pairs, one each side of the sash and associated frame. The sash may be hung on the stays for top, bottom or side opening. The frictional restraint to maintain the sash in an adjusted position is provided in the pivot joints by suitable design and manufacture of the pivot joints. Generally, in a stay of the defined kind the pivot joint includes a rivet which extends through the stay parts with the rivet being clinched in a mannerto generate forces which, after clinching, provide the frictional restraint.
The common construction of friction stays of the kind defined is to provide one short arm and one long arm with the lengths of the arms and the pivot centres being selected to control the movement of the sash. However, as will be appreciated, such friction stays are desirably to be used with a wide range of window sizes, types and styles. To a large extent, acceptance of friction stays in the design of architectural window systems requires the stays to take heavy loads, both static and dynamic, and to be safe and reliable in service. In these systems, the windows are usually hung with the stays at the side and the sash is referred to as a projecting top hung sash.
The common construction of friction stays as aforementioned has certain important disadvantages for some architectural window systems. For example, the stays rely on four rivets for all static and dynamic loads, including side and top loads, such as under wind pressure or top impact on the sash. Additionally, although it is possible to build in limit stops against which the stay arms may abut to avoid over-loading certain of the pivot joints, these limit stops introduce further problems being usually concealed in the window rebate, and the limit stops do not strengthen the load carrying capacity of the stay.
It is an object of the present invention to provide a friction stay of the kind specified having an improved construction to overcome the disadvantages and problems as aforementioned.
Accordingly, this invention consists in a friction stay of the kind specified characterised that a third arm is connected to the respective mounting plates by friction pivot joints, the third arm being pivotally connected to the respective mounting plates intermediate the pivot joints for the first and second arms, and the length and positions of the pivot centres of the third arm being arranged in relation to the first and second arms to control and limit the opening extent of the stay when installed in a window.
By the provision of a third arm, located by it's respective pivot joints intermediate the first and second arms, the load carrying capacity of the stay is increased, particularly under impact loads as may be applied to the top of the sash frame when in the partially or fully open top projecting position. The provision of the third arm increases the overall strength of the pivot joints and in the event of failure of one arm or joint provides a fail-safe link connection.
Furthermore, the provision of the third arm avoids the prior essential need to provide an independent limit for one of the stay arms.
Preferably, the third arm is arranged to extend and to pivot substantially parallel to the second arm and to be shorter than the second arm.
Other advantages arise from the provision of the third arm which may be used in the design of a friction stay in accordance with this invention.
One advantage is that the frictional restraint for holding the sash in the desired open position is dependent on the aggregate restraint value of six pivot joints, not four as previously. This advantage may be used to increase the frictional restraint for heavier or more highly loaded sashes, and/or to accommodate a range of manufacturing tolerances or performance. Thus the manufacturer or user can apply the stays of this invention to a wide range of applications or window systems.
Another advantage is that in service, the third arm may be arranged to provide a braking action on progressive opening of the sash so that the extreme limit of opening movement is only reached by increasing effort of the user. This reduces maximum strain on the joints and the fixings of the mounting plates which in the prior constructions using a limit stop could lead to severe distortion or failure of the stay parts of fixings.
Yet another advantage is that where it is desired to provide a force acting to pull in the top of the sash against the frame by ensuring a residual force in the longer lower arm, this function may be retained by suitable selection of the lengths of the arms and position of pivot centres whilst still more uniformly distributing the sash loads by three arms and their respective pivot connections.
An exemplary embodiment of this invention will now be described with reference to the accompanying drawings wherein:
Figure 1 is a side elevation depicting a friction stay in three operative positions;
Figure 2 is an exploded detail view of a friction rivet joint in the stay shown in Figure 1.
The stay comprises a mounting plate 1 adapted by holes 2 along the length thereof for fixing to the side of a rebate in a fixed window frame (not shown).
The stay further comprises another mounting plate 3 also adapted by holes 4 along the length thereof for fixing to the side of a sash (not shown).
As will be understood, in a window, two such stays are used to support the movable sash, one on each side, and the stays act as hinges.
The two mounting plates 1,3 are connected together by first, second and third stay arms 5,6 and 7 respectively. Each stay arm is connected at each respective end by a friction rivet joint 8 for restrained pivotal movement.
The friction rivet joints 8 may be of any suitable kind and arranged in any manner to suit assembly and manufacture. A suitable friction rivet joint is shown in Figure 2 and comprises a rivet 9 having a frusto-conical head 10 seated in a complementary recess 11 adjacent the end of an arm 5. The shank of the rivet 9 extends through a clearance hold in the arm concentric with the recess 11. The rivet extends through a hole 13 in the plate 1 which is pierced and plunged to leave a recess on the underside of the plate. Disposed on the rivet shank between the arm 5 and the plate lisa plastics support plate 14 having a central hole in which a washer 15 is received. The support plate and washer provide a spacer separating the arm 5 and the plate 1 to prevent metal-tometal contact on relative movement.The washer 15 may be of metal or plastics or metal coated with plastics.
The tail of the rivet is clinched to the underside of the plate 1 with a spiked washer 16 disposed adjacent to the plate 1 so that on pressure clinching the rivet, the rivet material is deformed into the interstices between the spikes and the spikes are pressed onto the plate 1. Following clinching, the clinched tail of the rivet is located and fixed against rotation relative to the plate 1. In known manner, the tail is clinched under pressure to leave a desired residual frictional force within the joint.
The rivet may be plastics coated, or a cone-like washer may lie under the head of the rivet and be seated in the recess.
This form of rivetted joint has advantages in providing a large bearing area between the head of the rivet and the arm for transmitting and supporting high loads in surface.
In use of the friction stay, the stay is opened from the fully folded position as shown in ghost broken lines in Figure 1 with the direction of effort being shown by the large arrow E. The successive stages of the position of the sash mounting plate 3 on opening movement are shown with the direction of movement of the sash being shown by the arrows D.
For closing movement the directions are reversed.
The first stay arm 5 controls the projection of the top of the sash from the window frame in the hinging movement to fully open, and in closing movement when the arms fold up into the window rebate to lie in between the overlying mounting plates. In particular, the length of the first arm 5 and the position of the pivot centres is selected to ensure that the top of the sash advances to and from the closed position without interference with the surrounding fixed window frame, for instance a top weatherboard (not shown). The first stay arm 5 has a movement greater than 90".
The second stay arm 6 is the longest arm and controls the direction of movement of the bottom of the sash. The pivotal movement of the second stay arm is less than 90". By arranging for the effective length of the arm 6 (that is the distance between the pivot centres at each end) to be greater than simply required to achieve folding movement in the closed position, the second arm may be stressed in the approach to the closed position to provide a force acting on the sash to pull-in the top of the sash.
The stay according to this invention includes the third arm 7 which has a pivot centre on the mounting plate 1 centrally intermediate those centres of the first and second arms. The loads arising through the three arms 5, 6 and 7 are therefore uniformly spread along the length of the mounting plate 1. The pivot centre on the mounting plate 2 is spaced from the pivot centre of the second arm 6 by a slightly less distance than the distance between the opposed pivot centres of the other ends of the arms 6 and 7 on the mounting plate 1.Accordingly, by this arrangement the arms 6 and 7 will move substantially parallel but due to the differences between the respective pivot centres, and the constraining effect of the short arm 5, the third arm serves as a restricting strut which limits opening movement of the mounting plate 2 without it being essential to provide any separate limit stop, for instance a lug or face on the mounting plate 1 engageable by the short arm 5.
Furthermore, by the selection of the effective lengths of the second and third arms and the distances between their associated and respective pivot centres, the amount of stress applied to the second arm may be selected for the desired pull-in feature.
As will now be understood, the third arm provides significant additional load carrying support for the sash load applied from the mounting plate, and ensures that loads are uniformly distributed, particu larly intermediate the pivot centres of the extreme ends of the mounting plates to which the first and second arms are connected. By this means it is also important to note that the third arm provides load carrying support approaching the expected centre o gravity of the sash when in the fully open position.
The friction stay according to this invention may have mounting plates in one or more parts if desirec and the shape, including cross-section, may be varied to suit the particular window system. The arms may also be of any suitable shape or configure tion.
Preferably, the friction stay is made of metal, such as aluminium or steel, and it may include a corrosio resistant finish or coating as desired.
Although the friction rivet joints are generally described as all being of the same kind or arrangement, this is not essential and if desired, or as selected for ease of manufacture or assembly, different types of friction rivet pivot joints could be used for different parts of the friction stay in accordance with this invention.
Claims (8)
1. In a friction stay of the kind specified character rised that a third arm is connected to the respective mounting plates by friction pivot joints, the third ar being pivotally connected to the respective mounting plates intermediate the pivot joints for the first and second arms, and the length and positions of the pivot centres of the third arm being arranged in relation to the first and second arms to control and limit the opening extent of the stay when installed in a window.
2. Afriction stay according to claim 1 wherein the third arm is arranged to extend and to pivot substantially parallel to the second arm and to be shorter than the second arm.
3. A friction stay according to claim 2 wherein the third arm is pivotally connected to the mounting plate by a rivetted friction joint having it's pivot centre substantially centrally disposed intermediate the pivot centres of the first and second arms on the said mounting plate.
4. A friction stay according to any one of the preceding claims wherein each pivot joint is a rivetted friction joint.
5. Afriction stay according to claim 4wherein each friction joint comprises a rivet having a frustoconical head received in a complementary recess for relative rotation.
6. Afriction stay according to claim 5 wherein the tail of the rivet is clinched to the underside of the mounting plate with a spiked washer being interposed between the underside of the tail prior to clinching to locate and restrain the rivet against rotation relative to the mounting plate after clinching.
7. Afriction stay according to any one of the preceding claims wherein the mounting plates are extrusions of aluminium alloy.
8. A friction stay substantially as hereinbefore described with reference to the accompanying drawings.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB08221544A GB2105780B (en) | 1981-08-13 | 1982-07-26 | Improvements in friction stays for windows |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8124734 | 1981-08-13 | ||
GB08221544A GB2105780B (en) | 1981-08-13 | 1982-07-26 | Improvements in friction stays for windows |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2105780A true GB2105780A (en) | 1983-03-30 |
GB2105780B GB2105780B (en) | 1985-09-04 |
Family
ID=26280449
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08221544A Expired GB2105780B (en) | 1981-08-13 | 1982-07-26 | Improvements in friction stays for windows |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2105780B (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2127092A (en) * | 1982-09-16 | 1984-04-04 | Securistyle Ltd | Improvements in friction supporting stays for windows |
GB2228766A (en) * | 1989-02-25 | 1990-09-05 | Lb Plastics Ltd | Friction stay-hinge |
GB2236802A (en) * | 1989-10-02 | 1991-04-17 | Interlock Ind Ltd | A window stay |
US11091940B2 (en) * | 2016-12-23 | 2021-08-17 | Assa Abloy New Zealand Limited | Window stays |
-
1982
- 1982-07-26 GB GB08221544A patent/GB2105780B/en not_active Expired
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2127092A (en) * | 1982-09-16 | 1984-04-04 | Securistyle Ltd | Improvements in friction supporting stays for windows |
GB2228766A (en) * | 1989-02-25 | 1990-09-05 | Lb Plastics Ltd | Friction stay-hinge |
GB2228766B (en) * | 1989-02-25 | 1993-03-24 | Lb Plastics Ltd | Friction supporting stays |
GB2236802A (en) * | 1989-10-02 | 1991-04-17 | Interlock Ind Ltd | A window stay |
GB2236802B (en) * | 1989-10-02 | 1993-08-11 | Interlock Ind Ltd | Improvements in window stays |
US11091940B2 (en) * | 2016-12-23 | 2021-08-17 | Assa Abloy New Zealand Limited | Window stays |
US12037823B2 (en) | 2016-12-23 | 2024-07-16 | Assa Abloy New Zealand Limited | Window stays |
Also Published As
Publication number | Publication date |
---|---|
GB2105780B (en) | 1985-09-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4718144A (en) | Friction supported stays for windows | |
US6021606A (en) | Lifting mechanism for horizontal hinged doors | |
US4622715A (en) | Friction supporting stays for windows | |
JP4468591B2 (en) | Shock absorber | |
CA2276127C (en) | Continuous hinge with a longitudinally supported portion and a longitudinally free end | |
US4689853A (en) | Hinge member for an all-glass plate member including a metal fitting | |
EP1362973B1 (en) | Egress hinge | |
JPH0433957B2 (en) | ||
US7908712B2 (en) | Hinge for a vehicle door | |
WO2007000570A2 (en) | Sash hinge | |
US4594750A (en) | Releasable hinge with spring biased pin moving mechanism | |
GB2105780A (en) | Improvements in friction stays for windows | |
GB2087972A (en) | Improved window stay | |
GB2101203A (en) | Improvements in friction stays for windows | |
GB2184778A (en) | Friction stay | |
GB2092221A (en) | Pivot joints for window stays | |
JPH0140199B2 (en) | ||
US5056193A (en) | Non-handed shock arrestor door pivot | |
GB2228531A (en) | Pivot for stay | |
GB2202578A (en) | Friction stays and window assemblies incorporating same | |
EP3926134A1 (en) | Self-closing hinge and a door assembly with a self-closing hinge | |
IE52921B1 (en) | Improvements in friction stays for windows | |
IE921777A1 (en) | Pivot joints | |
CN215761084U (en) | Damping hinge | |
CN215485424U (en) | Lower hinge assembly of casement window |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
PCNP | Patent ceased through non-payment of renewal fee |