GB2389871A - Sash window - Google Patents

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Publication number
GB2389871A
GB2389871A GB0214289A GB0214289A GB2389871A GB 2389871 A GB2389871 A GB 2389871A GB 0214289 A GB0214289 A GB 0214289A GB 0214289 A GB0214289 A GB 0214289A GB 2389871 A GB2389871 A GB 2389871A
Authority
GB
United Kingdom
Prior art keywords
sash
detent
spring balance
sliding shoe
coupling device
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
Application number
GB0214289A
Other versions
GB0214289D0 (en
GB2389871B (en
Inventor
James Arthur Albert Hickman
Gordon David Mclean
Robert Inglis Smith
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
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Individual
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Filing date
Publication date
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Priority to GB0214289A priority Critical patent/GB2389871B/en
Publication of GB0214289D0 publication Critical patent/GB0214289D0/en
Publication of GB2389871A publication Critical patent/GB2389871A/en
Application granted granted Critical
Publication of GB2389871B publication Critical patent/GB2389871B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05DHINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D15/00Suspension arrangements for wings
    • E05D15/16Suspension arrangements for wings for wings sliding vertically more or less in their own plane
    • E05D15/22Suspension arrangements for wings for wings sliding vertically more or less in their own plane allowing an additional movement
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06BFIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/32Arrangements of wings characterised by the manner of movement; Arrangements of movable wings in openings; Features of wings or frames relating solely to the manner of movement of the wing
    • E06B3/50Arrangements of wings characterised by the manner of movement; Arrangements of movable wings in openings; Features of wings or frames relating solely to the manner of movement of the wing with more than one kind of movement
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05DHINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D15/00Suspension arrangements for wings
    • E05D15/16Suspension arrangements for wings for wings sliding vertically more or less in their own plane
    • E05D15/18Suspension arrangements for wings for wings sliding vertically more or less in their own plane consisting of two or more independent parts, movable each in its own guides
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05YINDEXING 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
    • E05Y2900/00Application of doors, windows, wings or fittings thereof
    • E05Y2900/10Application of doors, windows, wings or fittings thereof for buildings or parts thereof
    • E05Y2900/13Type of wing
    • E05Y2900/148Windows

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Closing And Opening Devices For Wings, And Checks For Wings (AREA)
  • Wing Frames And Configurations (AREA)

Abstract

A spring balance coupling device for a sash window comprises a sliding shoe <B>22</B> having a detent <B>33</B> biassed into a projecting position, as in the lower sash shown, for abutment with a stop member <B>34</B> in the case jamb to restrict sliding movement of the shoe <B>22</B> but retractable into a retracted position, as in the upper sash shown, allowing free sliding movement of the shoe <B>22</B> by engagement wit a catch <B>31</B> mounted on a sash <B>32</B>, when the sash <B>32</B> is swung horizontally between an open, as in the lower sash shown, and closed, as in the upper sash shown, position. The sash <B>32</B> may be positioned with its catch <B>31</B> aligned with a stop member <B>34</B> by resting it on a hingedly mounted sash support arm. Alternatively several stop members <B>34</B> may be provided in the case jamb and the sash <B>32</B> may slide a limited distance once hinged open until the projecting detent <B>33</B> abuts one of the stop members <B>34.</B>

Description

GB 2389871 A continuation (74) Agent and/or Address for Service:
Crulkshank & Falrweather 19 Royal Exchange Square, GLASGOW, G1 3AE, United Kingdom
The present invention relates to sash and case window assemblies in which a window sash may be rotated out from its 5 normal position in the plane of the window for the purposes of cleaning of the window sash and the like.
In the sash and case type of window a sliding window sash is slidable up and down in the plane of the window for opening 10 and closing of the window, with a counterbalance system used to hold the window sash in any desired position.
Traditionally this used to be in the form of counterweights suspended from ropes connected to the window sash, but now is generally in the form of a spring balance assembly housed 15 within side jamb channels in the case at the side of the window sash.
Where such spring balances are used for counterbalancing of the sash window, some form of locking mechanism is used to 20 retain the end of the movable part of the spring balance while the window sash is tilted down from its normal upright position, and a wide variety of locking mechanisms has been designed for this purpose. This type of sash and case window with window sashes rotating about a horizontal axis to tilt 25 inwardly for cleaning etc. is normally referred to as a tilt sash window. Window sashes can, however, be quite heavy -
especially where, as is often the case, they are double glazed - and thus their controlled movement can require significant strength which may be beyond many individuals who 30 might need to clean their own windows. Even with stronger individuals, any momentary loss of control over movement of such a heavy item can present a significant safety hazard.
Thus whilst tilt sash windows meet official building control regulations relating to provision for cleaning of the 35 external surfaces of a window above the ground floor from
inside the building, some building control authorities have reservations concerning the safety aspects of tilting inwards fully glazed sashes. As each sash is tilted inwards it has to be supported in a horizontal position otherwise the glass S may crack. These problems increase substantially with larger window sizes.
Although sash and case windows of the traditional type counterbalanced by counterweights were often arranged to be 10 rotatable out of the window plane on hinges about vertical axis, this was not practical with spring balance counterbalanced windows, which were accordingly invariably rotated out of the window plane by tilting about a horizontal axis. The present inventors have recently found that a sash and case window counterbalanced by a spring balance can be designed for opening by rotation on hinges about a vertical axis, by means of the use of a new mode of support of the 20 sash. In more detail they have provided a sash and case window assembly having at least one sliding sash slidably mounted in a case, said at least one sliding sash being supported on at least one spring balance extending longitudinally of a respective case jamb, via at least one 25 tongue member mounted on said at least one sash and engaging in a respective recess provided in a sliding shoe connected to a reciprocally displaceable part of a respective spring balance, for reciprocable movement longitudinally of the case jambs between positions for supporting said at least one sash 30 in open and closed position positions thereof, and including a disengagement position for disengagement of said at least one sliding sash from a respective spring balance at one side, said assembly being provided with a retaining device for retaining the sliding shoe(s) provided at said at least
one side of said at least one sash, against movement thereof by said spring balance, from said disengagement position, the other side of said at least one sash being provided with at least one hinge formed and arranged for swinging support of 5 said at least one sash, to allow swinging open of said sash about an upright axis, said at least one tongue member being formed and arranged so as to be displaceable for disengagement from said sliding shoe(s) and re-engagement therewith to permit swinging open of said at least one sash 10 supported by said at least one hinge.
In a preferred form of the above design there was provided a sash and case window assembly having at least one sliding sash slidably mounted in a case, said at least one sliding 15 sash being supported on at least one spring balance extending longitudinally of a respective case jamb, via at least one tongue member mounted on said at least one sash and engaging in a respective recess provided in a sliding shoe connected to a reciprocably displaceable part of a respective spring 20 balance, for reciprocable movement longitudinally of the case jambs between positions for supporting said at least one sash in open and closed position positions thereof, and including a disengagement position for disengagement of said at least one sliding sash from a respective spring balance at one 25 side, said assembly being provided with a retaining device for retaining the sliding shoe(s) provided at said at least one side of said at least one sash, against movement thereof by said spring balance, from said disengagement position, the other side of said at least one sash being hingedly mounted 30 on a respective sliding shoe(s) for swinging support of said at least one sash, said at least one tongue member being formed and arranged so as to be displaceable for disengagement from said sliding shoe(s) and re-engagement
( -4- therewith to permit swinging open of said at least one sash hingedly supported on said at least one shoe.
It will be appreciated that various kinds of spring balance 5 may be used in accordance with the above designs. So-called spiral balances are, though, particularly convenient.
Normally a spring balance is provided at each side of the window sash to ensure smooth running of the sash.
10 With these designs, the window sash can be rotated out of the plane of the window in a particularly easy and safe manner requiring minimal effort, while securely retaining the uncoupled spring balance in an extended disengagement position against retraction from the disengaged position 15 until the window sash is fully restored to its normal operating position.
When the window sash is disengaged from the spring balance, which would normally be done at a sash position corresponding 20 to a more or less fully extended condition of the spring balance, it may be seen that the movable part of the spring balance which is now no longer held down by the weight of the sash, will be subjected to particularly strong upward forces.
Thus there is a serious danger of damage to the spring 25 balance and possible also to the case, in the event of any uncontrolled contraction of the spring balance as a result of the moveable part of the spring balance being inadvertently disengaged from the sash without having been secured properly, or being inadvertently disengaged from a secured 30 position, without having been properly re-engaged with the sash.
It is an object of the present invention to avoid or minimise one or more of the above disadvantages.
The present inventors have now found that the above problem 5 can be significantly reduced and correct safe operation of the spring balance retaining system substantially ensured by the use of an improved form of spring balance coupling device with an integrated retaining device which automatically operates in a fail safe manner.
The present invention provides a spring balance coupling device suitable for use in supporting a sash from a spring balance in a sash and case window, wherein said coupling device comprises: a sliding shoe for mounting in a case jamb, 15 in use of the coupling device, and having a spring balance connector for connection to the moveable part of a spring balance; and a catch device for mounting on a sash, in use of the coupling device, said sliding shoe having a detent movable laterally between: a retracted position for allowing 20 normal sliding movement of the sliding shoe in the case jamb, and a projecting position for abutment, in use of the coupling device, with at least one stop member provided in the case jamb adjacent the sliding path of the sliding shoe, for retaining the sliding shoe against movement thereof by 25 said spring balance upon disengagement of the sash therefrom in use of the coupling device, said detent being resiliently biased towards its projecting position, said detent being further provided with an abutment portion engagable by said catch device, in use of the coupling device, when said sash 30 is swung horizontally between an open position and a closed position, so as to displace said detent from its projecting position to its retracted position, said sliding shoe and said catch device being formed and arranged for captive inter engagement with each other in said closed position of the ,. ..
i -6 sash so as to couple said sash to the spring balance, when said detent is displaced by said catch device engaging said detent abutment portion, in use of the coupling device, whereby said sliding shoe is automatically retained against 5 movement by the spring balance upon swinging open of the sash. Advantageously the sliding shoe is provided with a guard in proximity to said detent abutment portion, formed and 10 arranged for blocking closure of the sash when said catch is incorrectly aligned for coming into captive inter-engagement with said sliding shoe, thereby preventing engagement of the detent abutment portion by the catch and displacement of the detent from its projecting position for retaining of the 15 sliding shoe against movement thereof by the spring balance.
Preferably the catch is formed and arranged for captive inter-engagement with at least one of said detent abutment portion, and said guard portion, most preferably for captive 20 inter engagement with both of these.
Desirably the catch device is provided with at least one resiliently displaceable gripping element for yieldably gripping said detent abutment portion when the sash is swung 25 open from its closed position, so as to forcibly displace the detent from its retracted position to its projecting position, before the catch fully disengages from the sliding shoe. 30 (It should be noted that the "closed" and "open" positions referred to here are those corresponding to the sash being in its normal position for sliding up and down in the case between positions corresponding to various degrees of opening and closure, and a position in which is has been horizontally
swung out from its normal position, and thus are distinct from "closed" and "open" positions in the normal use of the window). s In order to ensure that the sliding shoe detent is correctly aligned for abutment with the stop member when the sliding shoe detent is deployed when it is required to swing open the sash window, there is advantageously provided a sash support 10 device movable between a stowed position in which it permits unrestricted vertical displacement of the sash, and a deployed position in which it supports the sash at a predetermined, partly open, vertical position. Preferably the sash support device comprises a pivotally mounted arm 15 movable between a deployed position in which it projects laterally underneath the sash and a stowed position in which it extends clear of the sash face to allow free movement of the sash. Conveniently the sash support device is formed and arranged so as to be automatically deployable when the sash 20 is raised. This has the further advantage of providing protection against injury to someone having fingers or a hand underneath the sash when there is a spring balance failure, by preventing the sash from fully closing.
25 Alternatively, the case could be provided with a series of more or less closely spaced apart stop members so that even if the shoe device is not precisely aligned for abutment of the detent with any given stop member, it will in practice be more or less closely aligned with one or other stop member 30 and can only move a small distance when the window is swung open, before coming into abutment with a stop member and being retained against further movement by the spring balance. .
-8- In a further preferred aspect the present invention provides a sash and case window assembly having at least one sliding sash supported on at least one spring balance, wherein said at least one sliding sash is coupled to said at least one 5 spring balance by a coupling device of the present invention.
Further preferred features and advantages of the invention will appear from the following detailed description given by
way of example of a preferred embodiment illustrated with 10 reference to the accompanying drawings in which: Fig. 1 is a partial perspective view of the upper and lower sashes and part of the jambs of a sash and case window assembly provided with a coupling device of the invention; Fig. 2 is a horizontal section through the assembly of Fig. 15 1; Figs. 3 & 4 are detail horizontal sections through part of two modified embodiments of such sash and case windows assemblies; Fig. 5 is a front elevation of a sliding shoe of a coupling 20 device of the invention; Fig. 6 is a side elevation of the sliding shoe of Fig.5; Fig. 7 is a plan view of the sliding shoe of Fig. 5; Fig. 8 is a front elevation of a catch device of a coupling device of the invention for use with the sliding shoe of 25 Figs. 5 to 7; Fig. 9 is a side elevation of the catch device of Fig. 8; Fig. 10 is a horizontal section through part of a sash and case window assembly with another embodiment of a coupling device of the invention; 30 Fig. 11 is a horizontal section through part of a sash and case window assembly with a further embodiment of a coupling device of the invention; and Fig. 12 is a front elevation of said sash and case window assembly part of Fig. 11.
-9- Fig. 1 shows upper and lower window sashes 11, 12 of a sash and case window assembly 13. The window sashes 11, 12 are suspended from respective spiral type spring balances 14, 15 5 mounted in channel sections 16 in the jambs 17, 18 of the window case 19 (see Fig. 2).
In more detail each spring balance 14, 15 has an elongate upper housing portion 20 fixed to the jambs 17, from which 10 extends telescopically downwards a movable portion 21 (see Fig. 4). The movable portion 21 of each spring balance 14 is secured to a sliding shoe 22 (see Figs 2 3) captively mounted in a guideway 22a which extends substantially for the full height of the respective sash 11 and 12, via a lug 23. ' At one jamb 17 the sliding shoes 22 are provided with insert strips 24 of metal or other strong material (see also Fig. 3) via which are secured one leaf 25 of respective sash support hinges 26, the other leaf 27 of which is secured to the sash 20 11, 12. The latter leaf 27 has optional extension portions 28 which are continued around the top and bottom edges 29, 30 of the sashes in order to provide stronger support to the sash. As shown in more detail in Figs. 5 to 7, the sliding shoes 22 at the other jamb 18 are formed and arranged for 25 cooperation with catch devices 31 (see Figs. 8 and 9) secured to the sash frame 32 (see Fig. 10) to constitute coupling devices according to the present invention.
In order to prevent upward displacement of the shoe 22 by the 30 reciprocally moveable part 21 of the spring balance 14, 15 when the sash 11, 12 is swung open, the sliding shoe 22 is provided with a detent 33 engagable with a stop 34 mounted in the jamb 18 (see Fig. 10) adjacent the sliding path of the sliding shoe defined by the guideway 22a.
fit -10 The detent 33 has an abutment portion in the form of a boss 35 (see also Fig. 10) engageable by the catch device 31 when the sash 11, 12 is swung closed, so as to pull back the S detent 33 from a projecting position in which it engages a stop 34, against the force of spring means 36 urging the detent 33 towards said projecting position, back into a retracted position.
10 As shown in Fig. 5, the sliding shoe 22 of the coupling device has a guard 37 in the form of two opposed raised portions 38 above and below the detent 33 which cooperate with leading edge portions 39 of the catch device 31 so as to guide the catch device 31 into correct inter engagement with 15 the detent boss 35 and block misaligned catch device abutment with the detent boss 35 which might result in displacement of the detent 33 and inadvertent release of the spring balance movable part 21 before the sash 11, 12 has been properly coupled thereto. In order to ensure smooth free-running 20 movement of the detent 33 between its projecting and retracted positions, the detent is mounted between opposed roller bearings 40.
As shown in Fig. 8 the operational part of the catch device 25 31 comprises a generally 'U'-shaped element 41, the distal ends 39 of the limbs 42 thereof constituting leading edge portions of the catch device 31. Spring biased catch elements in the form of spring biased ball bearing units 43 are mounted in opposed relation on the limbs 42 outwardly of 30 a boss receiving recess 44 inside the 'U'-shaped element 41 to act as gripper elements for releasably captively retaining the detent boss 35 in inter engagement with the catch device 31 when the sash 11, 12 is swung open, until the detent 33 has been fully displaced from its retracted position to its
- 11 -
projecting position, thereby ensuring that the spring balance moveable part 21 is in a retained position before the sash 11, 12 is disengaged therefrom.
5 It will be appreciated that when the catch device 31 is fully interengaged with the sliding shoe 22, the detent boss is captively held between the limbs 42 of 'U'-shaped element 41 of the catch device 31, which limbs 42 are in turn captively held between the guard portions 38 of the sliding shoe 22, 10 thereby providing a secure coupling between the sash 11, 12 and the spring balance movable part 21.
In normal use of the window, the catch devices 31 are captively interengaged with the sliding shoes 22 and the 15 sashes 11, 12 can be slid up and down whilst being supported by the spring balances 14, 15 in the normal way. When it is desired to gain access to the outside of the sashes 11, 12 the inner sash 11 is positioned at a height corresponding to a disengagement position thereof (where the detent 33 is 20 positioned more or less immediately below a stop member 34), and the 11 sash simply swung open inwardly on its hinges 26 supported on the sliding shoe 22 supported on the spring balance 15 at that side of the sash 11. The detent 33 is simultaneously pushed across from its retracted position to 25 its projecting position by the spring means 36 and pulled across by the gripper elements 43 of the catch device 31.
When the detent 33 has been fully displaced into its projecting position, the detent boss 35 pushes aside the gripper element ball bearings 43a, allowing the catch device 30 31 to fully disengage from the sliding shoe 22, thereby uncoupling the sash 11, from the spring balance 14. The process can then be repeated with the upper sash 12.
/ -12 Fig. 3 shows a modified embodiment in which the hinge 26 has extended width leaves 25, 27 projecting inwardly beyond the inner face 45 of the lower sash 11 so that the pivot 46 of the hinge is offset inwardly of the sash inner face 45 so 5 that when the sash ll is swung open it can clear the jamb 17 and open out through an angle of up to 180 , thereby allowing the upper sash 12 to be swung open to a greater degree.
Fig. 4 shows a further modified embodiment with a similar 10 objective. In this case part 47 of the jamb 17 is hingedly connected 48 to the rest 49 of the jamb 17 so that it can be swung out of the way of the sash 11 when it is swung open.
Furthermore it may be noted that the present invention is 15 equally applicable to sash and case windows of wholly timber construction; with timber sashes and performed UPVC case liners; substantially wholly UPVC (or the like) construction; aluminium section construction etc. Where UPVC is used then this may advantageously be reinforced with timber, steel, or 20 other suitable material, inserts.
Figs. 11 and 12 show a sliding shoe arrangement substantially similar to those described with reference to the preceding drawings in which like parts have been indicated by like 25 reference numbers.
In order to enable the sash 11, 12 to be positioned correctly in a disengagement or uncoupling position in alignment with a given stop member 34, the window case jamb 18 is conveniently 30 provided with a hingedly mounted 50 sash support arm 51 as shown in Fig. 13. In more detail, the sash support arm 51 is normally stowed in an upwardly extending position allowing free movement of the sash up and down the case, and can be swung down to rest upon a stop 53 to provide a support for
( -13- the lower sash frame member 52 in an uncoupling and coupling position of the sash, thereby defining the correct position for disengagement of the sash from the spring balance, to ensure that the sliding shoe is retained by the stop member S 34 when the sash is disengaged.

Claims (12)

CLA:CMS
1. A spring balance coupling device suitable for use in supporting a sash from a spring balance in a sash and case window, wherein said coupling device comprises: a sliding shoe 5 for mounting in a case jamb, in use of the coupling device, and having a spring balance connector for connection to the moveable part of a spring balance; and a catch device for mounting on a sash, in use of the coupling device, said sliding shoe having a detent movable laterally between: a retracted position for 10 allowing normal sliding movement of the sliding shoe in the case jamb, and a projecting position for abutment, in use of the coupling device, with at least one stop member provided in the case jamb adjacent the sliding path of the sliding shoe, for retaining the sliding shoe against movement thereof by said 15 spring balance upon disengagement of the sash therefrom in use of the coupling device, said detent being resiliently biased towards its projecting position, said detent being further provided with an abutment portion engagable by said catch device, in use of the coupling device, when said sash is swung 20 horizontally between an open position and a closed position, so as to displace said detent from its projecting position to its retracted position, said sliding shoe and said catch device being formed and arranged for captive inter engagement with each other in said closed position of the sash so as to couple said 25 sash to the spring balance, when said detent is displaced by said catch device engaging said detent abutment portion, in use of the coupling device, whereby said sliding shoe is automatically retained against movement by the spring balance upon swinging open of the sash.
2. A coupling device as claimed in claim 1 wherein the sliding shoe is provided with a guard in proximity to said detent abutment portion, formed and arranged for blocking closure of the sash when said catch is incorrectly aligned for coming into 35 captive inter-engagement with said sliding shoe, thereby ..... ....
! 15 preventing engagement of the detent abutment portion by the catch and displacement of the detent from its projecting position for retaining of the sliding shoe against movement thereof by the spring balance.
s
3. A coupling device as claimed in claim 1 or claim 2 wherein the catch device is formed and arranged for captive inter engagement with at least one of said detent abutment portion, and said guard portion
4. A coupling device as claimed in claim 3 wherein the catch device is formed and arranged for captive inter-engagement with both of said detent abutment portion and said guard portion.
15
5. A coupling device as claimed in any one of claims 1 to 4 wherein the catch device is provided with at least one resiliently displaceable gripping element for yieldably gripping said detent abutment portion when the sash is swung open from its closed position, so as to forcibly displace the detent from 20 its retracted position to its projecting position, before the catch fully disengages from the sliding shoe.
6. A sash and case window assembly having at least one sliding sash supported on at least one spring balance, wherein said at 25 least one sliding sash is coupled to said at least one spring balance by a coupling device according to any one of claims 1 to 5.
7. An assembly as claimed in claim 6 wherein is provided a sash 30 support device movable between a stowed position in which it permits unrestricted vertical displacement of the sash, and a deployed position in which it supports the sash at a predetermined, partly open, vertical position whereby the sliding shoe detent may be correctly aligned for abutment with .. . ..... .. . .. ..
lo the stop member when the sliding shoe detent is deployed when it is required to swing open the sash window.
8. An assembly as claimed in claim 7 wherein the sash support 5 device comprises a pivotally mounted arm movable between a deployed position in which it projects laterally underneath the sash and a stowed position in which it extends clear of the sash face to allow free movement of the sash.
10
9. An assembly as claimed in claim 7 or claim 8 wherein the sash support device is formed and arranged so as to be automatically deployable when the sash is raised.
10. An assembly as claimed in claim 7 or claim 8 wherein the 15 case is provided with a series of closely spaced apart stop members so that even if the shoe device is not precisely aligned for abutment of the detent with any given stop member, it will in practice be more or less closely aligned with one or other stop member and can only move a small distance when the window 20 is swung open, before coming into abutment with a stop member and being retained against further movement by the spring balance.
11. A spring balance coupling device suitable for use in 25 supporting a sash from a spring balance in a sash and case window, substantially as described hereinbefore with particular reference to Figs 1 and 2, or 1 and 2 as modified by 3 or 4, together with Figs. 5 to 9, or 5 to 9 as modified by 10 or 11 and 12.
12. A sash and case window assembly having at least one sliding sash supported on at least one spring balance, wherein said at least one sliding sash is coupled to said at least one spring balance by a coupling device substantially as described 35 hereinbefore with particular reference to Figs 1 and 2, or 1 and .... .. .
......CLME:
.. ...CLME: ,! ... .
2 as modified by 3 or 4, together with Figs. 5 to 9, or 5 to 9 as modified by 10 or 11 and 12.
... .........CLME:
... ... . .....CLME:
GB0214289A 2002-06-20 2002-06-20 Window opening mechanism Expired - Fee Related GB2389871B (en)

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Application Number Priority Date Filing Date Title
GB0214289A GB2389871B (en) 2002-06-20 2002-06-20 Window opening mechanism

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Application Number Priority Date Filing Date Title
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GB0214289D0 GB0214289D0 (en) 2002-07-31
GB2389871A true GB2389871A (en) 2003-12-24
GB2389871B GB2389871B (en) 2005-08-24

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1862757A (en) * 1930-02-18 1932-06-14 Menns Window Corp Window construction
GB2344845A (en) * 1998-12-15 2000-06-21 Boardman Susan Mary Hinged sliding sash window
WO2002048495A1 (en) * 2000-12-12 2002-06-20 Hickman James A A Window opening mechanism

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1862757A (en) * 1930-02-18 1932-06-14 Menns Window Corp Window construction
GB2344845A (en) * 1998-12-15 2000-06-21 Boardman Susan Mary Hinged sliding sash window
WO2002048495A1 (en) * 2000-12-12 2002-06-20 Hickman James A A Window opening mechanism

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Publication number Publication date
GB0214289D0 (en) 2002-07-31
GB2389871B (en) 2005-08-24

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