EP0225058A1 - Window Stays - Google Patents
Window Stays Download PDFInfo
- Publication number
- EP0225058A1 EP0225058A1 EP86308474A EP86308474A EP0225058A1 EP 0225058 A1 EP0225058 A1 EP 0225058A1 EP 86308474 A EP86308474 A EP 86308474A EP 86308474 A EP86308474 A EP 86308474A EP 0225058 A1 EP0225058 A1 EP 0225058A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- track
- bar
- channel
- window
- stay
- 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
- 230000000717 retained effect Effects 0.000 claims description 5
- 238000010276 construction Methods 0.000 abstract description 5
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000004677 Nylon Substances 0.000 description 2
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 2
- 239000011152 fibreglass Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 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
- 238000000465 moulding Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Images
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
- E05D15/44—Suspension arrangements for wings supported on arms movable in vertical planes with pivoted arms and vertically-sliding guides
-
- 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
Definitions
- the present invention relates to window stays and, more particularly, to friction window stays of the four bar linkage type.
- a four bar friction linkage window stay is described in U.S. Patent Specification No. 2784459.
- This type of stay comprises a slider which is movable along an elongate track which is fixed to the window frame.
- Two links each have one end pivotally mounted to the slider. The other end of one link is pivotally connected to a bar which is fixed to the frame of the openable window vent.
- a strut is pivotally mounted to the track and is also pivotally connected to the other end of the other link and to an intermediate point on the bar. In the closed position of the window the bar overlies the track with the links and strut inbetween the track and the bar.
- the end of the track is normally provided with a cap member into which the end of the bar seats in a closed position.
- Such window stays may be mounted to the window frame at either side of the window, in which case the window vent will pivot open about its top edge. The window vent is held in a desired open position by the friction between the slider and the track.
- Such stays may also be used for side opening windows. In this case the stays are mounted to the upper and lower edge of the window frame. With such a mounting the stay fixed to the lower window frame member carries a considerable load when the window is open. Since the depth of the stay in the closed position must be accommodated in a recess formed in the frame of the openable window vent in order that a good fit may be maintained between the window vent and the frame in the closed position, a limit is effectively imposed on the overall depth of the closed stay. However, if the links are made relatively thin to keep down the depth of the stay they lack the necessary rigidity for carrying the weight of a side opening window.
- the present invention is directed to solving the technical problem of providing a window stay of the above-mentioned type which is capable of providing the required rigidity to support large pivoting windows, and, particularly such windows which are side opening, without increasing the overall depth of the closed stay.
- the present invention accordingly provides a window stay comprising an elongate track defining a channel, a slider having a guide portion disposed in and movable along the track channel, first and second links each having one end pivotally mounted to said slider, a bar for mounting to the frame of an openable window vent, the other end of the first link being pivotally mounted adjacent one end of said bar, a retaining cap member mounted to the track, said one end of the bar being shaped to be retained by said cap member, and a strut having one end pivotally mounted to the other end of said track, the other end of said strut being pivotally mounted to an intermediate point on the bar, and the other end of said second link being pivotally mounted to an intermediate point on said strut, characterised in that in the closed position of the stay the bar lies parallel to and to one side of the track channel with its one end retained by said cap member at a position offset to one side of said track channel.
- Such a window stay can be provided with links, struts and bars which are relatively thicker than those of the prior art for a given overall depth of the stay, since, in the closed position, the bar lies offset to one side of the track channel which may have the same overall depth as the combined depth of the bar, a link and the strut. This allows the stay to have a greater rigidity.
- the track comprises a relatively thin base portion carrying two longitudinally extending, parallel upstanding portions each having an inturned edge overlapping the base portion, one upstanding portion being defined along a longitudinal edge of the base portion and the other upstanding portion being defined spaced from the other longitudinal edge, the two upstanding portions defining an upwardly open channel with the inturned edges facing one another.
- the track comprises a relatively thin base portion, an upstanding edge portion along one longitudinal edge of the base portion which carries an upper portion overlying the base portion, which portion terminates in a downwardly projecting lip extending parallel to and inwardly of the other longitudinal edge of said base portion, in order to define a laterally-open track channel for receiving the guide portion of the slider, the base portion to one side of the channel pivotally mounting said one end of the strut and carrying the cap member.
- This construction provides a channel which is closed on three sides and therefore provides a larger friction surface for engagement with the slider than in the alternative arrangement.
- a further advantage of both embodiments of the track is that the base portion to one side of the channel can provide additional support for the links if required so as to provide better rigidity of the strut in the open position and therefore enable its use with much larger windows than hitherto possible with prior art stays.
- a preferred embodiment of the stay is provided with a stop projecting from the base portion to one side of the channel, said stop engaging with a projecting edge of the slider at the limit of pivoting motion, said stop engaging and supporting said second link in the closed position of the stay.
- the cap member includes an upstanding projection instead of a recess, extra resistance to forcing is provided by the use of a metal upstanding projection which effectively locks the edge of the bar in the closed position.
- the cap member may be provided with a locking member on its side remote from the track, said locking member engaging in the closed position of the stay with the edge of said one end of the bar.
- a cut-out is formed in the edge of the end of the bar to receive the locking member.
- the engagement of the cut-out with the locking member which can be more rigid than the remainder of the cap member, prevents the end of the bar from being wrenched out of the cap member.
- the window stay illustrated in Figure 1 is one of a pair.
- the other window stay of the pair is a mirror image of the stay illustrated, otherwise it is identical in all respects. Therefore, only one stay of the pair will be described.
- the stay comprises a track 2 which defines an upwardly-open channel 4 in which a guide portion 5 of a slider 6 can be moved longitudinally of the track.
- the other end of the first link 8 is pivotally connected close to one end 12 of a bar 14 which is provided with fixing points 16 for securing it to the base of a recess in a side of an openable window vent.
- the bar 14 is also pivotally connected at an intermediate point to one end of a strut 18 which has its other end pivotally connected to the track 2 via a support pad 19.
- the second link 10 has its end remote from the slider 6 pivotally connected to an intermediate point on the strut 18.
- the strut 18 and the bar 14 are stepped at portions 20 and 22 respectively so that when the slider 6 is moved to its uppermost (relative to Figure 1) position, the bar 14 can be closed up to the track 2 so that its end 12 is received and retained by a cap member 26 fitted at the end of the base plate 2. In this closed position the bar 14 overlies the strut 18 and the links 8 and 10 to one side of the channel 4 as best seen in Figure 3.
- the track 2 is an elongate member made of metal, preferably aluminium.
- the track 2 comprises a flat, relatively thin (for example 1.5 to 2 mm) base portion 28 which lies against the frame of the window.
- the base portion has two upstanding portions 29 and 31 each with a laterally inturned edge overlapping the base portion. The inturned edges face one another to define the upwardly open channel 4.
- Upstanding portion 29 is formed along one longitudinal edge of the base portion and the other upstanding portion 31 is spaced intermediate the longitudinal edges of the base portion so as to leave a part of the base portion laterally offset to one side of the channel 4.
- the channel 4 receives the guide portion 5 of the slider 6 which is illustrated in more detail in Figure 4.
- the track 2 is fixed to the window frame by means of countersunk screws which pass through elongate fitting holes 58, 60 in the base portion of the track channel.
- the mounting holes 58, 60 are disposed beyond the limits of movement of the slider within the channel.
- An additional mounting hole 61 may be provided at the end of the track 2 in the base portion to one side of the channel.
- the guide portion 5 of the slider is sized to be received within the channel 4 and is preferably made of glass reinforced plastics material, e.g. nylon.
- the guide portion 5 is secured by means of three screws or pins to an upper slider plate 102 which is preferably made of austenitic stainless steel.
- the slider plate is relatively thin and extends across the entire width of the track as shown in Figures 1 and 2.
- a slider support pad 104 is also secured to the slider plate 102 by means of two screws passing through the holes 106, 108 in the slider plate and support pad respectively.
- the support pad lies between the portion of the track laterally offset from the channel and the slider plate. It has a downwardly turned edge 110 which co-operates with the longitudinal free edge of the track.
- the central portion 112 of the support pad 104 is of greater depth than the remainder so that, when secured to the slider plate 102, two slots 46, 47 are formed between the slider support pad and the slider plate in which the ends of the links 8 and 10 can be respectively received. Bores 114, 116 are formed in the slider plate through which pivot pins are mounted to secure the ends of the links 8 and 10. The edges of the central portion 112 defining the ends of the slots 46, 47 are curved so as to support the links in their pivoting motion.
- a cut out 40 is provided in both the slider plate and the slider support pad to accommodate the head of a fixing screw 16 ⁇ used in fixing the bar 14 to the frame of the openable window vent in the closed position of the stay as illustrated in Figure 3.
- the slider support pad 104 together with the slider plate form a mounting portion of the slider.
- the end cap 26 is shown in more detail in Figure 5.
- the end cap may be a glass reinforced plastics, preferably nylon, member or a stainless steel pressing.
- the end cap is secured to the track by means of a tongue 120 which is sized to be a tight fit in the channel of the track.
- the tongue 120 is formed with an elongate hole through which a mounting screw passes.
- the elongate hole 122 aligns with an elongate hole 58 in the base portion of the track so that a single mounting screw passing through the holes in the tongue and the base of the track secures the track to the window frame.
- the cap member 26 defines an upstanding edge 64 which is aligned with the outer edge of the upstanding portion 31 so that, in the closed position of the stay as shown in Figure 2 the inner edge of the end 12 of the bar 14 lies against this upstanding edge 64.
- the retaining edge 64 prevents the bar being opened out from the track in the wrong direction, i.e. to the left as shown in the drawings. Such incorrect opening is also resisted by the edge 31 of the channel.
- An upstanding projection 124 is mounted in the corner of the cap member to one side of the channel so that as the tapered end 12 of the bar 14 is brought into its closed position, the inclined edge slides behind the upstanding projection 124 as the tip slides along the edge 64.
- the upstanding projection is, in this embodiment, eccentric head of a pin made of austenitic stainless steel.
- the head is eccentric so that the position of the upstanding projection can be adjusted by rotation of the pin so that the projection abuts against the inclined edge of the end 12 in the closed position of the stay but does not interfere with the smooth closing action.
- the upstanding projection 124 also serves as a locking member preventing forcing of the bar transversely away from the track as in an attempted break in.
- the portion of the end cap carrying the upstanding projection 124 is also provided with a tongue 126 which overlies the end of the base portion of the track laterally offset from the channel to provide a support for the upper end of the link 8 in the closed position of the stay as clearly shown in Figure 3.
- the second embodiment of the window stay illustrated in Figures 6 to 8 is essentially similar to the embodiment described above except for the construction of the track, the details of the mounting of the links 8, 10 to the slider 6, and the design of the end 12 of the strut and the cap member 26.
- the basic construction of the second embodiment will therefore not be described in detail.
- the same reference numerals have been used for the same features in the drawings of both embodiments.
- the track 2 is an elongate metal plate with a cross section as illustrated in Figure 8.
- the track 2 comprises a flat, relatively thin base portion 28 which lies against the frame of the window.
- the base portion has one free edge 30 which is slightly upturned to provide a support for the motion of the links 8 and 10.
- the other longitudinal edge 32 of the base portion is an upstanding edge portion which carries an upper portion 34 parallel to the base portion 28.
- the free edge of the upper portion 34 terminates in a downwardly projecting lip 36 which extends parallel to and inwardly of the edge 30 of the base portion 28.
- the upstanding edge portion 32, the upper portion 34, the part of the base portion 28 beneath the upper portion 34, and the depending edge portion 36 together define the channel 4 which is of rectangular cross section with a longitudinally extending open slot 38 between the edge portion 36 and the base portion 28. This channel 4 receives the guide portion 5 of the slider 6.
- the slider 6 is made of plastics material and comprises a thin flat plate 41 which carries a rectangular block 42 which is surmounted by a top plate 44 so as to define at either side of the block 42 two slots 46, 47 having upper and lower portions defined by the top plate 44 and the base plate 41.
- the block 42 and adjacent parts of the plates 41, 44 define the guide portion 5.
- the ends of the links 8, 10 are received in the slots 46, 47 and are pivotally mounted to the slider by means of a rivet or other pin which passes across the slot and is secured to the top plate 44 and base plate 41.
- the cross-section of the guide portion 5 is sized to be received in the rectangular cross-section of the channel 4 with a part of the plate 41 projecting through the slot 38. It will be appreciated that the slider may be formed as a one-piece moulding.
- a grub screw 48 is received in a transverse bore which extends through the guide portion 5 of the slider 6 to a recess 50 defined in the bottom of the guide portion.
- the recess 50 receives a pad 52 which is engaged by the end of the grub screw 48.
- the screw 48 can be tightened so as to press the pad 52 into relatively tight engagement with the surface of the base portion 28 of the channel. As the pad is forced into tight engagement with the base portion the top of the guide portion will frictionally engage the inside wall of the upper portion 34 of the channel.
- the grub screw 48 can be suitably adjusted in order to maintain the correct degree of friction between the slider and the track so that once moved to a selected position along the track the slider stays there. However, the friction must not be such as to require undue force to move the slider along the track to open or close the window.
- This friction adjusting device can also be incorporated into the guide portion of the slider of the first embodiment.
- the access opening 56 is positioned so that the grub screw can be adjusted with the window open.
- the access opening 60 overlies the grub screw 48 when the slider is at its other limit of motion with the window in the fully opened position. This position is defined by the engagement of the mounting portion 39 or projecting plate 41 of the slider with an upstanding stop 62 defined in the track 2.
- the upstanding stop 62 has a height such that it does not obstruct the pivoting motion of the second link 10 but supports the link 10 when the stay is in its closed position.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wing Frames And Configurations (AREA)
Abstract
Description
- The present invention relates to window stays and, more particularly, to friction window stays of the four bar linkage type.
- A four bar friction linkage window stay is described in U.S. Patent Specification No. 2784459. This type of stay comprises a slider which is movable along an elongate track which is fixed to the window frame. Two links each have one end pivotally mounted to the slider. The other end of one link is pivotally connected to a bar which is fixed to the frame of the openable window vent. A strut is pivotally mounted to the track and is also pivotally connected to the other end of the other link and to an intermediate point on the bar. In the closed position of the window the bar overlies the track with the links and strut inbetween the track and the bar. The end of the track is normally provided with a cap member into which the end of the bar seats in a closed position.
- Such window stays may be mounted to the window frame at either side of the window, in which case the window vent will pivot open about its top edge. The window vent is held in a desired open position by the friction between the slider and the track. Such stays may also be used for side opening windows. In this case the stays are mounted to the upper and lower edge of the window frame. With such a mounting the stay fixed to the lower window frame member carries a considerable load when the window is open. Since the depth of the stay in the closed position must be accommodated in a recess formed in the frame of the openable window vent in order that a good fit may be maintained between the window vent and the frame in the closed position, a limit is effectively imposed on the overall depth of the closed stay. However, if the links are made relatively thin to keep down the depth of the stay they lack the necessary rigidity for carrying the weight of a side opening window.
- The present invention is directed to solving the technical problem of providing a window stay of the above-mentioned type which is capable of providing the required rigidity to support large pivoting windows, and, particularly such windows which are side opening, without increasing the overall depth of the closed stay.
- The present invention accordingly provides a window stay comprising an elongate track defining a channel, a slider having a guide portion disposed in and movable along the track channel, first and second links each having one end pivotally mounted to said slider, a bar for mounting to the frame of an openable window vent, the other end of the first link being pivotally mounted adjacent one end of said bar, a retaining cap member mounted to the track, said one end of the bar being shaped to be retained by said cap member, and a strut having one end pivotally mounted to the other end of said track, the other end of said strut being pivotally mounted to an intermediate point on the bar, and the other end of said second link being pivotally mounted to an intermediate point on said strut, characterised in that in the closed position of the stay the bar lies parallel to and to one side of the track channel with its one end retained by said cap member at a position offset to one side of said track channel.
- Such a window stay can be provided with links, struts and bars which are relatively thicker than those of the prior art for a given overall depth of the stay, since, in the closed position, the bar lies offset to one side of the track channel which may have the same overall depth as the combined depth of the bar, a link and the strut. This allows the stay to have a greater rigidity.
- In one embodiment the track comprises a relatively thin base portion carrying two longitudinally extending, parallel upstanding portions each having an inturned edge overlapping the base portion, one upstanding portion being defined along a longitudinal edge of the base portion and the other upstanding portion being defined spaced from the other longitudinal edge, the two upstanding portions defining an upwardly open channel with the inturned edges facing one another. This construction of the track allows easy assembly of the stay and convenient fixing to the window frame. The portion of the slider which projects laterally from the guide portion must overlie the upper edge of the channel. However, this portion may be made relatively thin so that it does not substantially add to the overall depth of the stay.
- In an alternative embodiment, the track comprises a relatively thin base portion, an upstanding edge portion along one longitudinal edge of the base portion which carries an upper portion overlying the base portion, which portion terminates in a downwardly projecting lip extending parallel to and inwardly of the other longitudinal edge of said base portion, in order to define a laterally-open track channel for receiving the guide portion of the slider, the base portion to one side of the channel pivotally mounting said one end of the strut and carrying the cap member. This construction provides a channel which is closed on three sides and therefore provides a larger friction surface for engagement with the slider than in the alternative arrangement.
- A further advantage of both embodiments of the track is that the base portion to one side of the channel can provide additional support for the links if required so as to provide better rigidity of the strut in the open position and therefore enable its use with much larger windows than hitherto possible with prior art stays.
- In order to limit the pivoting motion of the window, a preferred embodiment of the stay is provided with a stop projecting from the base portion to one side of the channel, said stop engaging with a projecting edge of the slider at the limit of pivoting motion, said stop engaging and supporting said second link in the closed position of the stay. In this way the stay is maintained rigid in its closed position as opposed to prior art structures in which, in the closed position, this link would be unsupported yet spaced from the base of the channel making up the track.
- Another technical problem associated with prior art designs of this type of window stay is that it is difficult to secure the window vent at its pivoting edge when the vent is closed. It is relatively easy for an intruder to force the window by wrenching the end of the bar from its engagement with the cap member, even when the opposite edge of the window vent is locked to the frame. In the embodiment in which the cap member includes an upstanding projection instead of a recess, extra resistance to forcing is provided by the use of a metal upstanding projection which effectively locks the edge of the bar in the closed position. Alternatively, the cap member may be provided with a locking member on its side remote from the track, said locking member engaging in the closed position of the stay with the edge of said one end of the bar. Preferably a cut-out is formed in the edge of the end of the bar to receive the locking member. The engagement of the cut-out with the locking member, which can be more rigid than the remainder of the cap member, prevents the end of the bar from being wrenched out of the cap member.
- Two embodiments of a window stay in accordance with the invention will now be described, by way of example only, with reference to the accompanying diagrammatic drawings in which:
- Figure 1 is a plan view of a first embodiment of the window stay in a partially open position;
- Figure 2 is a plan view of the stay of Figure 1 in a closed position;
- Figure 3 is a side view of the stay of Figures 1 and 2;
- Figure 4 is a perspective exploded view of the slider used in the stay of Figure 1;
- Figure 5 is a perspective view of the end cap used in the stay of Figure 1;
- Figure 6 is a plan view of a second embodiment of the window stay in a partially open position;
- Figure 7 is a plan view of the slider for use in the window stay of Figure 4;
- Figure 8 is a section on line IIX-IIX in Figure 6;
- Figure 9 is a transverse section through a modified embodiment of the cap member; and
- Figure 10 is a transverse section through another modified embodiment of the cap member.
- The window stay illustrated in Figure 1 is one of a pair. The other window stay of the pair is a mirror image of the stay illustrated, otherwise it is identical in all respects. Therefore, only one stay of the pair will be described.
- The stay comprises a
track 2 which defines an upwardly-open channel 4 in which aguide portion 5 of aslider 6 can be moved longitudinally of the track. First andsecond links slider 6. The other end of thefirst link 8 is pivotally connected close to oneend 12 of abar 14 which is provided withfixing points 16 for securing it to the base of a recess in a side of an openable window vent. Thebar 14 is also pivotally connected at an intermediate point to one end of astrut 18 which has its other end pivotally connected to thetrack 2 via asupport pad 19. Thesecond link 10 has its end remote from theslider 6 pivotally connected to an intermediate point on thestrut 18. - The
strut 18 and thebar 14 are stepped atportions slider 6 is moved to its uppermost (relative to Figure 1) position, thebar 14 can be closed up to thetrack 2 so that itsend 12 is received and retained by acap member 26 fitted at the end of thebase plate 2. In this closed position thebar 14 overlies thestrut 18 and thelinks channel 4 as best seen in Figure 3. - The
track 2 is an elongate member made of metal, preferably aluminium. Thetrack 2 comprises a flat, relatively thin (for example 1.5 to 2 mm)base portion 28 which lies against the frame of the window. The base portion has twoupstanding portions open channel 4. Upstandingportion 29 is formed along one longitudinal edge of the base portion and the otherupstanding portion 31 is spaced intermediate the longitudinal edges of the base portion so as to leave a part of the base portion laterally offset to one side of thechannel 4. Thechannel 4 receives theguide portion 5 of theslider 6 which is illustrated in more detail in Figure 4. - The
track 2 is fixed to the window frame by means of countersunk screws which pass throughelongate fitting holes mounting holes additional mounting hole 61 may be provided at the end of thetrack 2 in the base portion to one side of the channel. - The
guide portion 5 of the slider is sized to be received within thechannel 4 and is preferably made of glass reinforced plastics material, e.g. nylon. Theguide portion 5 is secured by means of three screws or pins to anupper slider plate 102 which is preferably made of austenitic stainless steel. The slider plate is relatively thin and extends across the entire width of the track as shown in Figures 1 and 2. Aslider support pad 104 is also secured to theslider plate 102 by means of two screws passing through theholes edge 110 which co-operates with the longitudinal free edge of the track. Thecentral portion 112 of thesupport pad 104 is of greater depth than the remainder so that, when secured to theslider plate 102, twoslots links Bores links central portion 112 defining the ends of theslots bar 14 to the frame of the openable window vent in the closed position of the stay as illustrated in Figure 3. Theslider support pad 104 together with the slider plate form a mounting portion of the slider. - The
end cap 26 is shown in more detail in Figure 5. The end cap may be a glass reinforced plastics, preferably nylon, member or a stainless steel pressing. The end cap is secured to the track by means of atongue 120 which is sized to be a tight fit in the channel of the track. Thetongue 120 is formed with an elongate hole through which a mounting screw passes. Theelongate hole 122 aligns with anelongate hole 58 in the base portion of the track so that a single mounting screw passing through the holes in the tongue and the base of the track secures the track to the window frame. Thecap member 26 defines anupstanding edge 64 which is aligned with the outer edge of theupstanding portion 31 so that, in the closed position of the stay as shown in Figure 2 the inner edge of theend 12 of thebar 14 lies against thisupstanding edge 64. The retainingedge 64 prevents the bar being opened out from the track in the wrong direction, i.e. to the left as shown in the drawings. Such incorrect opening is also resisted by theedge 31 of the channel. Anupstanding projection 124 is mounted in the corner of the cap member to one side of the channel so that as thetapered end 12 of thebar 14 is brought into its closed position, the inclined edge slides behind theupstanding projection 124 as the tip slides along theedge 64. When the bar is in its fully closed position theprojection 124 engages against the inclined edge of theend 12 and retains the bar in the closed position until the window is pivoted open again. The upstanding projection is, in this embodiment, eccentric head of a pin made of austenitic stainless steel. The head is eccentric so that the position of the upstanding projection can be adjusted by rotation of the pin so that the projection abuts against the inclined edge of theend 12 in the closed position of the stay but does not interfere with the smooth closing action. By abutting against the inclined edge of theend 12, theupstanding projection 124 also serves as a locking member preventing forcing of the bar transversely away from the track as in an attempted break in. The portion of the end cap carrying theupstanding projection 124 is also provided with atongue 126 which overlies the end of the base portion of the track laterally offset from the channel to provide a support for the upper end of thelink 8 in the closed position of the stay as clearly shown in Figure 3. - The second embodiment of the window stay illustrated in Figures 6 to 8 is essentially similar to the embodiment described above except for the construction of the track, the details of the mounting of the
links slider 6, and the design of theend 12 of the strut and thecap member 26. The basic construction of the second embodiment will therefore not be described in detail. The same reference numerals have been used for the same features in the drawings of both embodiments. - The
track 2 is an elongate metal plate with a cross section as illustrated in Figure 8. Thetrack 2 comprises a flat, relativelythin base portion 28 which lies against the frame of the window. The base portion has onefree edge 30 which is slightly upturned to provide a support for the motion of thelinks longitudinal edge 32 of the base portion is an upstanding edge portion which carries anupper portion 34 parallel to thebase portion 28. The free edge of theupper portion 34 terminates in a downwardly projectinglip 36 which extends parallel to and inwardly of theedge 30 of thebase portion 28. Theupstanding edge portion 32, theupper portion 34, the part of thebase portion 28 beneath theupper portion 34, and the dependingedge portion 36 together define thechannel 4 which is of rectangular cross section with a longitudinally extendingopen slot 38 between theedge portion 36 and thebase portion 28. Thischannel 4 receives theguide portion 5 of theslider 6. - In this embodiment, the
slider 6 is made of plastics material and comprises a thinflat plate 41 which carries arectangular block 42 which is surmounted by atop plate 44 so as to define at either side of theblock 42 twoslots top plate 44 and thebase plate 41. Theblock 42 and adjacent parts of theplates guide portion 5. The ends of thelinks slots top plate 44 andbase plate 41. The cross-section of theguide portion 5 is sized to be received in the rectangular cross-section of thechannel 4 with a part of theplate 41 projecting through theslot 38. It will be appreciated that the slider may be formed as a one-piece moulding. - As shown in Figure 8, a
grub screw 48 is received in a transverse bore which extends through theguide portion 5 of theslider 6 to arecess 50 defined in the bottom of the guide portion. Therecess 50 receives apad 52 which is engaged by the end of thegrub screw 48. Thescrew 48 can be tightened so as to press thepad 52 into relatively tight engagement with the surface of thebase portion 28 of the channel. As the pad is forced into tight engagement with the base portion the top of the guide portion will frictionally engage the inside wall of theupper portion 34 of the channel. Thegrub screw 48 can be suitably adjusted in order to maintain the correct degree of friction between the slider and the track so that once moved to a selected position along the track the slider stays there. However, the friction must not be such as to require undue force to move the slider along the track to open or close the window. This friction adjusting device can also be incorporated into the guide portion of the slider of the first embodiment. - Adjustment holes 54, 56 are provided in the
upper portion 34 of the track so that thegrub screw 48 in theguide portion 5 of theslider 6 can be adjusted to provide the required friction. Theaccess opening 54 is positioned so that it overlies thegrub screw 48 when the slider is at one limit of its motion in which the stay is in the closed position. This adjustment opening can be used for factory pre-setting the friction. It will be appreciated that this opening will be inaccessible once the stay is fitted to a window as in the closed position the window vent will be closed over this opening. - The
access opening 56 is positioned so that the grub screw can be adjusted with the window open. Conveniently, the access opening 60 overlies thegrub screw 48 when the slider is at its other limit of motion with the window in the fully opened position. This position is defined by the engagement of the mounting portion 39 or projectingplate 41 of the slider with anupstanding stop 62 defined in thetrack 2. Theupstanding stop 62 has a height such that it does not obstruct the pivoting motion of thesecond link 10 but supports thelink 10 when the stay is in its closed position. - The
track 2 is fixed to the window frame by means of countersunk screws which pass throughfitting holes base portions hole 61 may be provided at the end of thetrack 2 in the base portion to one side of the channel. - The end of the
track 2 is provided with anend cap 26 in which therecess 24 for the end of the bar is defined. In the embodiment of Figures 1 to 5 the cap member is rectangular in plan so that the stay can be mounted close up to the corner of the window frame. In this second embodiment the cap member 26ʹ is triangular in plan with the recess 24ʹ defined by upstanding cam surfaces 66 and 68 and upstanding retainingedge 70. Thecam surface 66 is aligned with the dependingedge portion 36 of the channel. At its upper end thecam surface 66 adjoins thecam surface 68 which is inclined at 135° to thesurface 66. Thesurface 68 is set at right angles to the upstanding retainingedge 70, which extends at 45° to the longitudinal direction of thebase plate 2. Ametal locking pin 72 is positioned close to the lower end of the retainingedge 70 and a corresponding cut-out 74 is formed in the edge of theend 12 of thebar 14. The retainingedge 64 prevents the bar being opened out from the track in the wrong direction, i.e. to the left as shown in the drawings. Such incorrect opening is also resisted by theedge 31 of the channel. - In Figure 9 an alternative embodiment of the cap member 26ʺ is illustrated. This cap member defines a
closed recess 24 in which part of thecam surface 63 is replaced by aroller 76 which is rotatably mounted by means of atransverse pin 78. The inclined edge of theend 12 of thebar 14 engages with the periphery of theroller 76 as it enters therecess 24 defined in the cap member 26ʺ. - In Figure 10 a further alternative embodiment of the
cap member 26‴ is illustrated. In this embodiment the cam surface or projection is replaces by apivotable pawl 80 which is mounted in thecap member 26‴ by means of atransverse pivot pin 82. Thepawl 80 has a first arm 84 against which theend 12 of thebar 14 engages as it is brought into thecap member 26‴. The engagement of thebar 14 with the arm 84 causes the pawl to pivot to the position shown in chain line in Figure 10. In this position thesecond arm 86 acts on the inclined edge of theend 12 of thebar 14 so as to resist forced opening of the stay. - In use, the
track 2 of either embodiment of the stay is secured to a window frame with thecap member 26 fitted close to the corner of the frame adjacent to the intended pivoting edge of the window. Thebase portion 28 can be seated in a slight recess in the frame if required. The recess must not be so deep as to obstruct the pivoting motion of thelinks bars 14 are secured to recesses formed in the sides of the window vent by means of fixing screws passing through the fixingslots 16. Theend 12 of thebar 14 is offset from the main plane of thebar 14 by thestep 22 so that it is placed slightly spaced from the base of the recess in the frame of the openable window vent. - When the window stays are fitted the friction between the slider and the track is adjusted by use of the
grub screw 48. The required friction will vary in dependence on the type and weight of window to which the stay is secured and whether the pivoting axis of the window is horizontal or vertical. - Pivoting the window relative to the frame causes the
slider 6 to move along itstrack 4. As the window is opened, theslider 6 moves downwardly (as illustrated in Figure 1 or 6) until itssupport pad 104 or projectingplate 40 engages thestop 62. In the first embodiment, as the window is closed theslider 6 moves upwardly as shown in Figure 1 with thetip engaging edge 64 until the inclined edge of theend 12 engages behind theprojection 124. In the second embodiment, as the window is closed theslider 6 moves upwardly as shown in Figure 6 until the pointed tip of theend 12 comes into engagement with thecam surface 66 of the cap 26ʹ. The tip engages with this surface because of the offset between the pivoting points of thelinks strut 18. The tip of the bar moves up thesurface 66 until it reaches the junction between thesurface surface 68 until it finally becomes seated at the junction between thecam surface 68 and the retainingedge 70. Due to the described motion the inclined surface of theend 12 passes behind the lockingpin 72 which is received in the cut-out 74 as thebar 14 moves into its final closed position as the tip moves along thecam surface 68. The engagement of thepin 72 in the cut-out 74 provides a considerable degree of resistance to forcing of the stay. - The operation of the embodiment of Figure 9 is similar to the operation of the first embodiment, except that in this case the inclined edge of the
end 12 of thebar 14 engages with the periphery of theroller 76 as it moves intorecess 24. - In the embodiment of Figure 10, the
end 12 of thebar 14 engages the inner surface of the arm 84 of the pawl and causes it to pivot round to the chain line position as shown in Figure 10 as the stay reaches its closed position. - In order that the stay may be suitable for supporting relatively large side opening windows, the depth of the
links bar 14 and strut 18 may be relatively large since the overall depth of the closed stay is determined by the combined depth of three of these members together with the thickness of thebase portion 28 of thetrack 2, which, since it does not serve any structural purpose can be relatively thin. - In the second embodiment, if the
edge 30 is not required for supporting the pivoting motion of thelinks base portion 28 of thetrack 2 which extends to the right (as shown in Figure 1) of thechannel 4 can be removed between the two ends so that only sufficient is provided at oneend 26 for carrying the cap member 26ʹ and at the other end for supporting the pivoting mounting of thestrut 18. In such an embodiment thestop 62, if required, would need to be provided by for example a screw directly mounted into the window frame.
Claims (12)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8527049 | 1985-11-02 | ||
GB858527049A GB8527049D0 (en) | 1985-11-02 | 1985-11-02 | Window stays |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0225058A1 true EP0225058A1 (en) | 1987-06-10 |
EP0225058B1 EP0225058B1 (en) | 1989-03-22 |
Family
ID=10587644
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19860308474 Expired EP0225058B1 (en) | 1985-11-02 | 1986-10-30 | Window stays |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0225058B1 (en) |
DE (1) | DE3662545D1 (en) |
GB (2) | GB8527049D0 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2182387A (en) * | 1985-11-02 | 1987-05-13 | Cego | Window stays |
GB2284233A (en) * | 1993-11-25 | 1995-05-31 | Dgs Hardware Ltd | Window friction stay |
GB2287283A (en) * | 1994-03-02 | 1995-09-13 | Euromond Ltd | Friction stay with reinforced slider |
GB2334547A (en) * | 1998-02-21 | 1999-08-25 | Cotswold Architect Prod | Window stays |
WO2021257291A1 (en) * | 2020-06-15 | 2021-12-23 | Caldwell Manufacturing Company North America, LLC | High-capacity multi-bar linkage hinge assembly for pivotally mounted window vent |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2201997B (en) * | 1987-03-10 | 1990-10-10 | Cego Ltd | Window stays |
GB2202271B (en) * | 1987-03-10 | 1990-10-10 | Cego Ltd | Window stays |
GB8720072D0 (en) * | 1987-08-26 | 1987-09-30 | Buckley J E | Frictionstay hinge |
GB2214229A (en) * | 1987-12-24 | 1989-08-31 | Cego Ltd | Window stays |
GB2214230B (en) * | 1987-12-24 | 1992-01-08 | Cego Ltd | Window stays |
NZ226410A (en) * | 1988-03-09 | 1993-01-27 | Interlock Ind Ltd | Window stay with transverse retaining force on closure |
GB2221721B (en) * | 1988-08-12 | 1992-04-08 | John Edward Buckley | Improvements in or relating to hinges |
GB2225378B (en) * | 1988-10-18 | 1992-05-20 | Walfab Limited | Improvements in hinges |
NZ230871A (en) * | 1989-10-02 | 1993-09-27 | Interlock Ind Ltd | Window stay has a frame mounting plate with a plastics extension |
GB2236799B (en) * | 1989-10-10 | 1993-08-04 | John Edward Buckley | Improvements in or relating to hinges |
GB2454940B (en) * | 2007-11-26 | 2012-06-06 | Securistyle Ltd | A slider and a hinge incorporating a slider |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2784459A (en) * | 1955-02-21 | 1957-03-12 | A W Anderberg Mfg Co | Supporting bracket for windows |
EP0001487A1 (en) * | 1977-09-30 | 1979-04-18 | Interlock Industries Limited | A window stay for adjustable mounting of a window sash on a window frame |
US4364201A (en) * | 1980-09-15 | 1982-12-21 | A. W. Anderberg Manufacturing Co. | Full-opening window linkage assembly |
EP0112681A1 (en) * | 1982-12-24 | 1984-07-04 | Securistyle Limited | Improvement in friction supporting stays |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8527049D0 (en) * | 1985-11-02 | 1985-12-04 | Norcros Investments Ltd | Window stays |
-
1985
- 1985-11-02 GB GB858527049A patent/GB8527049D0/en active Pending
-
1986
- 1986-10-30 DE DE8686308474T patent/DE3662545D1/en not_active Expired
- 1986-10-30 EP EP19860308474 patent/EP0225058B1/en not_active Expired
- 1986-10-30 GB GB08626001A patent/GB2182387B/en not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2784459A (en) * | 1955-02-21 | 1957-03-12 | A W Anderberg Mfg Co | Supporting bracket for windows |
EP0001487A1 (en) * | 1977-09-30 | 1979-04-18 | Interlock Industries Limited | A window stay for adjustable mounting of a window sash on a window frame |
US4364201A (en) * | 1980-09-15 | 1982-12-21 | A. W. Anderberg Manufacturing Co. | Full-opening window linkage assembly |
EP0112681A1 (en) * | 1982-12-24 | 1984-07-04 | Securistyle Limited | Improvement in friction supporting stays |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2182387A (en) * | 1985-11-02 | 1987-05-13 | Cego | Window stays |
GB2284233A (en) * | 1993-11-25 | 1995-05-31 | Dgs Hardware Ltd | Window friction stay |
GB2284233B (en) * | 1993-11-25 | 1997-12-10 | Dgs Hardware Ltd | Improvements in or relating to window supports |
GB2287283A (en) * | 1994-03-02 | 1995-09-13 | Euromond Ltd | Friction stay with reinforced slider |
GB2287283B (en) * | 1994-03-02 | 1997-04-16 | Euromond Ltd | Friction stays |
GB2334547A (en) * | 1998-02-21 | 1999-08-25 | Cotswold Architect Prod | Window stays |
WO2021257291A1 (en) * | 2020-06-15 | 2021-12-23 | Caldwell Manufacturing Company North America, LLC | High-capacity multi-bar linkage hinge assembly for pivotally mounted window vent |
GB2611934A (en) * | 2020-06-15 | 2023-04-19 | Caldwell Mfg Co North America Llc | High-capacity multi-bar linkage hinge assembly for pivotally mounted window vent |
Also Published As
Publication number | Publication date |
---|---|
GB2182387B (en) | 1989-01-05 |
GB8626001D0 (en) | 1986-12-03 |
EP0225058B1 (en) | 1989-03-22 |
GB2182387A (en) | 1987-05-13 |
DE3662545D1 (en) | 1989-04-27 |
GB8527049D0 (en) | 1985-12-04 |
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