GB2383081A

GB2383081A - Hinge providing height, lateral and compression adjustment

Info

Publication number: GB2383081A
Application number: GB0129839A
Authority: GB
Inventors: Nigel John Haigh; David Leonard Johnson
Original assignee: J K Furnex Ltd; Laird Security Hardware Ltd; J K FURNEX Ltd
Current assignee: Era Security Hardware Ltd
Priority date: 2001-12-13
Filing date: 2001-12-13
Publication date: 2003-06-18
Anticipated expiration: 2021-12-13
Also published as: GB2383081B; GB0129839D0

Abstract

A hinge comprises first and second parts 10,11, the first part 10 comprises a first member 13 and second member 14, the first member 13 is provided with fixing means for connecting the first part to a surface, and the second member 14 is able to move relative to the first member 13 in a direction parallel to the hinge axis so as to provide height adjustment of the hinge. Preferably the first part 10 carries a screw for effecting the height adjustment, the screw is preferably only accessible when the second part 11 is in a predetermined position. Also disclosed is: a hinge which provides lateral adjustment [figures 6-10]; a hinge which comprises removable means [38, figure 5] to prevent a hinge pin from being removed from a bush of the hinge; and a hinge which comprises removable means [81, figure 17] which acts between the first and second parts of the hinge so as to hold the parts in a predetermined fixed relative disposition.

Description

HINGES The invention relates to hinges.

A hinge comprises a first part and a second part interconnected for pivotal movement about an axis. One use for such a hinge is to connect a sash to a frame so that the sash can be swung into and out of the frame between closed and open positions. In this case the first part may be connected to the frame and the second part to the sash.

Movement between the sash and the frame along the pivot axis is normally achieved by separating the first and second parts along the axis. Where such movement is an adjustment, this results in a gap which may provide a point of attack for breaking the hinge. If the movement is to separate the sash from the frame, then the length of movement along the axis can be significant and this can cause problems.

According to a first aspect of the invention, there is provided a hinge comprising a first part and a second part interconnected for relative pivotal movement about an axis, the first part having a first member and a second member, the first member providing a fixing for connecting the first part to a surface and the second member being movable relative to the first member in a direction parallel to said axis.

Where the movement is adjustment, the presence of a gap along the axis can be avoided. Where the movement is separation, the length of movement can be reduced.

Movement between the sash and the frame in a direction normal to the pivot axis is normally provided by forming the second part by a first member fixed relative to the axis and a second member providing a fixing for connecting the second part to a surface and being movable relative to the fixed member in said direction normal to the axis. This can provide only a limited range of movement.

According to a second aspect of the invention, there is provided a hinge comprising a first part and a second part interconnected for relative pivotal movement about an axis, the second part comprising a first member fixed relative to the axis and a second member being formed by a bottom member mounted on the first member movable relative to the first member in a direction normal to said axis and a top member carried by the bottom member, providing a fixing for connecting the second part to a surface and being movable relative to the bottom member in said direction normal to said axis.

By providing both a bottom member and a top member that are movable in said direction, a greater range of movement can be provided.

According to a third aspect of the invention, there is provided a hinge comprising a first part and a second part interconnected for relative pivotal movement about an axis

provided by a pin carried by one leaf and passing through a bush in the other leaf, said other leaf carrying removable means for preventing the pin being removed from the bush in an axial direction.

When connecting the hinge between, for example, a frame and a sash, one part is initially comparatively easy to fix to the sash/frame. Subsequently connecting the other part to the frame/sash can be made more difficult because the free part tends to pivot.

According to a fourth aspect of the invention, there is provided a hinge comprising a first part and a second part interconnected for relative pivotal movement about an axis, removable means being provided acting between the first part and the second part for holding the parts in a predetermined fixed relative disposition.

The following is a more detailed description of an embodiment of the invention, by way of example, reference being made to the accompanying drawings in which :- Figure 1 is an exploded view of a hinge with a first part of the hinge connected to a frame, a second part of the hinge connected to a sash and a pin, Figure 2 is an exploded view of the first hinge part showing first and second members, the first member being connected to the frame,

Figure 3 is a perspective view of the first and second members of Figure 2, Figure 4 is a cross-section through the frame and the first and second members in a plane normal to the length of the frame and with the second member engaged with the first member, Figure 5 is an exploded view of the second member of Figures 2 to 4 with a bush and the pin of Figure 1, Figure 6 is a side elevation of the second part of the hinge of Figure 1 with a cover removed to show a first member carrying top and bottom members in a first disposition relative to the first member, Figure 7 is a similar view to Figure 6 but showing the top and bottom members in a second disposition relative to the first member, Figure 8 is a similar view to Figures 6 and 7 but showing the top and bottom members in a third disposition relative to the first member, Figure 9 is a perspective view from one side, one end and above, a perspective view from the other side, the other end and above and a perspective view from said one side, said one end and beneath of the top and bottom members of Figures 6 to 8,

Figure 10 is an exploded view of the top and bottom members of Figures 6 to 9, Figure 11 is a cross-section through the hinge in the plane of the pin axis and through the first part of the hinge, Figure 12 is a perspective view from one side, one end and above of the complete hinge, Figure 13 is a perspective view from the other side, the other end and above of the complete hinge, Figures 14 to 16 are respective cross-sectional views of parts of sash/frame combinations on which the hinge of Figures 1 to 13 can be used, Figure 17 is an exploded view of the second part of the hinge and the bush of Figure 5 carrying the pin and showing a key for locking the pin relative to the bush.

Referring first to Figure 1, the hinge comprises a frame part 10, a sash part 11 and a hinge pin 12 that connects the frame part 10 and the sash part 11 for relative pivotal movement about a pin axis.

Referring next to Figures 2,3, and 4, the frame part 10 comprises a first fixed part 13 and a second hinge part 14. The fixed part 13 is formed by a generally rectangular block having a mounting surface 15, side walls 16 and end walls 17. A channel 18 extends from one end wall 17 and terminates adjacent the other end wall 17.

Accordingly, the sides of the channel are formed by projecting portions of the side walls 16 and each of these portions is provided with a pair of inwardly directed flanges 19. The flanges 19 of one side wall 16 are in register with the flanges 19 of the other side wall 16 and the flanges of each pair are separated by a gap 20. A pair of fixing holes 21 extend from the base of the channel 18 through the fixed part 13 and emerge at the mounting surface 15.

The end wall 17 of the fixed part 13 remote from the open end of the channel 18 is provided with a threaded hole 27 that extends through the end wall 17 and emerges at the closed end of the channel 18. This hole receives a grub screw (not shown) for a purpose to be described below.

The hinge part 14 comprises a bush mounting 22 formed with a generally cylindrical bush receiving passage 23. To one side of the bush mounting 22 the hinge part 16 comprises a pair of spaced T cross-section mountings 24a, 24b. As seen in Figure 3, the mounting 24a is of greater length than the mounting 24b and the two mountings are spaced apart in a direction parallel to the length of the bush receiving passage 23.

The mountings 24a, 24b are partially surrounded by a pair of spaced parallel side walls 25 interconnected at one end by an end wall 26.

As seen in Figure 4, the mountings 24a, 24b are engageable in the channel 18. The head of the wider mounting 24a enters the open end of the channel 18 behind the end pair of flanges 19 and the head of the narrower mounting 24b passes through the gaps 20. Of course, both mountings 24a, 24b could pass through the open end of the channel 18. The heads of the mountings 24a, 24b thus form tongues that are then slid along the groove formed behind the flanges to lock the fixed part 13 and the hinge part 14 together as seen in Figure 4.

When the fixed part 13 and the hinge part 14 are so interconnected, the narrower mounting 24b is adjacent the end of the hole 27. Accordingly, by rotating a grub screw inserted into the hole 27, the hinge part 14 can be moved relative to the fixed part 13 in a direction parallel to the axis of the bush receiving passage 23. The purpose of this will be described below.

Referring next to Figure 5, the bush receiving passage 23 carries a bush 28 which has a cylindrical outer surface that is a close fit 29 within the passage 23. The central passage 30 of the bush 29 is arranged eccentrically relative to the outer surface 29 and the bush receiving passage 23. The purpose of this is to provide adjustment in a manner to be described below.

Referring also to Figure 5, the hinge pin 12 is provided with a hexagonal head 31 and an elongate shank divided into an upper portion 32 and a lower portion 33 by an annular groove 34. The end of the shank remote from the head 31 is a reduced diameter portion 35. The upper portion 32 and the lower portion 33 are both cylindrical and co-axial but the head 31 and the reduced diameter portion 35 are arranged eccentrically relative to the upper and lower portions 32,33. This provides adjustment in a way to be described below.

The hinge part 14 is provided with a threaded hole 36 extending from between the mountings 24a, 24b and emerging towards the centre of the bush receiving passage 23.

The bush 28 is provided with a corresponding hole 37 which is in register with the hinge part hole 36 when the bush 28 is inserted in the bush receiving passage 23. An anti-punch grub screw 38 is received in the threaded holes 36 and locks the bush 28 to the passage as well as providing an anti-punch facility for the hinge pin 12 in a manner to be described below.

Referring next to Figures 6,7, 8,9 and 10, the sash part 11 comprises a back plate 39 and a mounting assembly 40. The back plate 39 is generally planar and is formed with a pair of parallel elongate but spaced slots 41. The back plate 39 carries a pair of spaced parallel walls 42. The walls 42 are parallel to the slots 41 with the slots 41 being located between the walls 42. Each wall 42 has a row of inwardly directed teeth 43. As seen in Figures 6,7 and 8, there are six teeth 43 on each wall.

The back plate 39 carries a sledge indicated generally at 44 and formed by a bottom sledge 45, a top sledge 46 and an adjusting screw 47. The bottom sledge 45 is shown in Figure 10 and comprises a generally flat rectangular member provided with a pair of parallel spaced slots 48, with each slot 48 open at one end and closed at the other end. These slots 48 provide the bottom sledge 45 with a generally M-shape with two outer limbs 49 and a central limb 50. The outer edge of each outer limb 49 carries a row of outwardly directed teeth 51. As seen in Figure 10, there are four such teeth.

Adjacent the closed ends of the slots 48 and at the end of the central limb 50, there is a square cut-out 52 leading to a semi-circular groove in the central limb 50 which connects the cut-out 52 to a U-shaped recess 53 (seen in Figure 10) in the central limb 50.

The top sledge 46 is best seen in Figures 9 and 10. The top sledge 46 is generally Hshaped in plan view with a central web portion 54 extending between two elongate portions 55. Each elongate portion 55 is generally T-shaped in cross-section with a wider elongate head 56 and a narrower elongate boss 57. Three parallel fixing holes 58 are spaced apart along each elongate portion 55 extending from the head 56 through the boss 57. Each boss 57 has an outer wall 59 (see Figure 10) provided with a groove 60. The purpose of this will be described below.

The central web portion 54 is formed with a block 61 provided with a threaded hole 62 extending through the block 61 in a direction parallel to the lengths of the elongate portions 55. A semi-circular cross-section groove 63 is provided as a continuation of the threaded hole 62 at one end of the block 61.

The top sledge 46 is a sliding fit with the bottom sledge 45 with the bosses 57 extending through respective slots 48 of the bottom sledge 45 and the inner edges of the outer limbs 48 being received in respective grooves 60 in the bosses 57 of the top sledge 46. The block 61 is received in the recess 53 in the central limb 50 of the bottom sledge 45 and, when the bosses 57 are adjacent the closed ends of the slots 48, the semi-circular groove 63 in the central portion 54 overlies the corresponding groove in the central limb 50 to form a passage of circular cross-section. As seen in Figure 9, the adjustment screw 47 has a head 64 that is received in the cut-out 52 with the threaded portion of the screw 47 extending through the passageway formed by the groove in the central limb 50 and the groove 63 and being in threaded engagement with the threaded hole 62 in the block 61. Accordingly, by rotating the screw, the top sledge 46 can be slid back and forth along the slots 48 to adjust its position relative to the bottom sledge 45. The purpose of this will be described below.

As seen in Figures 6,7 and 8, each set of teeth 51 on an outer limb 49 of the bottom sledge 45 are engageable with a respective set of teeth 43 on the back plate 39. As also seen in Figures 6,7 and 8, this engagement is possible in at least three different

relative dispositions of the sledge 44 relative to the back plate 39 along the length of the slots 41. When so mounted on the back plate 39, each boss 57 is received in a respective one of the slots 41 on the back plate 39. The purpose of the adjustment of these relative positions will be discussed below.

As best seen in Figures 6,7, 8 and 11, the mounting assembly 40 comprises an upper ear 65a and a lower ear 65b. The ears 65a, 65b extend from the back plate 39 in a direction opposite to the slots 48 and form between them a U-shaped cavity 66. The upper ear 65a is provided with a circular hole 67 surrounded by a shaped recess 68.

The lower ear 65b also includes a circular cross-section hole 69 surrounded by a recess 70 but the hole 69 carries a cup 71 best seen in Figure 11. Each ear 65a, 65b is associated with a respective anti-lift leg 74a, 74b whose function will be described below.

The hinge is assembled as follows.

The fixed part 13 and the hinge part 14 of the frame part 10 are assembled together as described above. The bush 28 is inserted into the bush receiving passage 23 with the threaded hole 37 in the bush 28 aligned with the threaded hole 36 in the hinge part 14. The bush receiving passage 23 is dimensioned so that it fits between the upper ear 65a and the lower ear 65b with the central passage 30 of the bush 28 aligned with the holes 67,69 in the upper and lower ears 65a, 65b. When so positioned, the hinge

pin 12 can be inserted through the hole 67 in the upper ear 65a then passing through the central passage 30 of the bush 28 until the reduced diameter portion 35 of the hinge pin 12 is received in the cup 71. In this position, the head 31 of the hinge pin 12 is received in a hexagonal hole in a mounting 85 located in the recess 68 in the upper ear 65a. This position is shown in Figure 11. When so positioned, the grub screw 38 is screwed through the holes 36,37 and has an end that is received in the groove 34 in the hinge pin 12 but does not contact the groove 34. This is also seen in Figure 11. Finally, upper and lower end caps 72a, 72b are inserted into respective recesses 68,70 in the upper and lower ears 65a, 65b to cover the ends of the hinge pin 12.

The sledge 44 is mounted on the back plate 39 as described above.

Referring to Figure 12, a cover 73 is then placed over the back plate 39 to cover the sledge 44 and is secured to the back plate by a screw (not shown).

When so assembled, the frame part 10 is connected to the sash part 11 for pivotal movement about an axis defined by the hinge pin 12. This movement is between a closed position in which the mounting surface 15 on the fixed part 13 lies in a plane parallel to the plane of the back plate 39, as seen in Figure 13 and in an open position in which the mounting surface 15 lies in a plane generally normal to the plane of the back plate 39. As seen in Figure 13, in the closed position, the anti-lift legs 74 carried

on respective upper and lower ears 65a, 65b, cover the end wall 17 of the fixed hinge part 13 including the hole 27 and also cover the end wall 26 of the hinge part 14.

This is a security feature to prevent access to the hole 27 when the hinge is in the closed position. In the open position, however, the hole 27 is revealed.

The hinge described above with reference to the drawings is used to connect a movable sash to a fixed frame. The movable sash may, for example, be a door or window. It is designed primarily for use with sash and frame openings including standard and French doors with frame and sash designs such that the sash has a cover leg over the frame. The cover leg may, for example, have a height of between 13mm and 21mm and a cover of 8mm to 12mm. Figures 14,15 and 16 show three crosssections of frames and sashes of this kind. In these three Figures, like parts are given the same reference numerals and are not described in detail. In each case, the frame 75 has a mounting surface 76 partially overlaid by a cover leg 77 of a movable sash 78. The cover leg 77 also has a mounting surface 79. In Figure 14, the frame is formed of extruded PVCU as is the sash 78. In Figure 15, both the frame 75 and the sash 78 are of timber and in Figure 16 the frame 75 is of PVCU and the sash 78 is of timber.

Referring to these Figures and to Figure 1, the hinge is mounted by separating the fixed part 13 from the hinge part 14 and screwing the fixed part 13 to the mounting surface 76 of the frame 75 using screws passing through the holes 21 in the fixed part

13. The cover 73 is then removed from the back plate 39 and the sash part 11 connected to the mounting surface 79 on the sash 78 by screws extending through the fixing holes 58 on the top sledge 46.

Figure 17 shows an arrangement which aids this connection. In this modification, the exterior surface of the bush 28 is provided with a plurality of pairs of diametrically opposed semi-circular grooves 80 extending parallel to the axis of the pin 12. The lower end of each of these grooves 80 is continued into the bush receiving passage 23 which includes co-operating grooves to form holes 82. A key 81 is provided formed by a body 82 from which projects a pair of parallel rods 83. The size and spacing of the rods 83 is such that each rod 83 can be slid along a respective one of a pair of grooves 80 and into the associated holes 82 in the bush 28 and the bush receiving passage 23. The effect of this is to prevent the frame part 10 rotating relative to the sash part 11. This aids fixing the sash part 11 to the leaf 78 since it cannot swing around. Once fixing is complete, the key 81 can be removed and the end cap 72a replaced.

It will be appreciated that the connection will usually require at least one further hinge.

After the hinge has been connected between the frame 75 and the leaf 78 it is adjustable in three mutually perpendicular directions to allow adjustment of the height

of the leaf 78 relative to the frame 75, adjustment of the lateral position of the leaf 78 relative to the frame 75 and adjustment to change the spacing between the frame mounting surface 76 and the leaf mounting surface 79. This is usually referred to as compression adjustment.

The height adjustment is achieved by moving the hinge to the open position in which the lower anti-lift leg 74b exposes the hole 27 in the fixed part 13. A screwdriver can then be used to adjust the vertical position of the hinge part 14 relative to the fixed part 13 by sliding the mountings 24a, 24b in the channel 18. As soon as the hinge is moved to the closed position, the lower anti-lift leg 74b again covers the hole 27.

Lateral adjustment is achieved using the sledge 44 which provides both coarse and fine adjustment. The coarse adjustment is achieved by partially or fully removing the fixing screws from the fixing holes 58 and disengaging the teeth on the bottom sledge 45 from the teeth 43 on the back plate 39. The teeth 43,51 can then be re-engaged at a different relative position as shown in Figures 6,7 and 8 to provide coarse adjustment of the lateral position. The fine adjustment is achieved without full removal of the screws from the fixing holes 58 by turning the adjusting screw 47.

This slides the top sledge 46 relative to the bottom sledge 45 so moving the back plate 39 relative to the sash mounting surface 79 in the direction of the length of the slots 41.

Compression adjustment is achieved by the eccentricity of the bush 78 and by the eccentricity of the head 31 and the reduced diameter portion 35 of the hinge pin 12.

The eccentricity of the bush 78 provides a coarse compression adjustment and is usually pre-set during manufacture, since the position of the bush 28 relative to the bush receiving passage 23 is fixed by the alignment of the hinge part hole 37 with the bush hole 27. The eccentric head 31 and reduced diameter portion 35 of the hinge pin 12 provide, however, a fine adjustment that is achieved simply by rotating the hinge pin. To assist this, as shown in Figure 17, the mounting 85 in the upper ear 65a may be provided with marks that align with a mark on the head 31 of the hinge pin 12 to indicate the maximum and minimum compression adjustments and adjustments between those positions.

Traditionally, standard residential doors open inwardly. As the door is thinner than the brickwork of the building, it is usually fixed either into the cavity between the brick skins or into the outer skin of bricks. The resultant area ofbrick/plasterwork to the inside of the door is known as the reveal. Standard flag-type hinges have between 30mm-35mm of hinge pin protruding above the body and this requires the door sash to be lifted a minimum of 35mm so that it can be removed from the door frame. In many cases, however, the gap from the top of the sash of the leaf to the reveal is 1 Omm-12mm so preventing the door sash being removed in this manner. Thus, in this circumstance, either the hinges must be disassembled and the fixing screws removed or the frame fixings removed and the whole door frame removed with the door sash.

The hinge described above with reference to the drawings overcomes this problem by the use of a frame part formed in two parts. With the door open, the door can be lifted to disengage the hinge part 14 from the fixed part 13 and this may only require lifting the door by a height of, say, 8.5mm. This enables the sash to be removed under a reveal with the frame in situ and without disassembling the hinge.

It will be appreciated that the presence of the anti-lift legs 74 and 74b only allows this removal with the hinge in the open position. In the closed position, the anti-lift legs 74a, 74b cover the ends of the fixed part 13 and the hinge part 14 and although there must be some spacing to allow vertical adjustment of the hinge, this is always less than the relative movement required to disengage the hinge part 14 from the fixed part 13. Thus, in the closed position, the anti-lift legs 74 prevent the sash being lifted off the frame.

The presence of the grub screw 38 whose end is located in the groove 34 in the hinge pin 12 prevents the hinge pin 12 being punched out of the bush.

It will be appreciated that not all of the features of the hinge described above need be used together. The arrangement of the sledge 44 may be used separately. The key 81 may be used separately. The two-part construction of the first hinge part 10 may be used separately. The use of the grub screw 38 to prevent the hinge pin 12 being knocked out may also be used separately.

Claims

CLAIMS 1. A hinge comprising a first part and a second part interconnected for relative pivotal movement about an axis, the first part having a first member and a second member, the first member providing a fixing for connecting the first part to a surface and the second member being movable relative to the first member in a direction parallel to said axis.
2. A hinge according to claim 1 wherein the first member and the second member are provided with inter-engaging means that allow said movement.
3. A hinge according to claim 2 wherein the inter-engaging parts comprise a groove and a tongue fitting in said groove and slidable relative to said groove in said direction.
4. A hinge according to claim 3 wherein the groove is formed on the first member and the tongue on the second member.
5. A hinge according to any one of claims 1 to 4 wherein the first part includes adjustment means operable to move the first member relative to the second member.

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6. A hinge according to claim 6 wherein the adjustment means comprise a screw carried by one member and bearing on the other member, rotation of the screw causing said relative adjustment.
7. A hinge according to claim 6 wherein the second member has a portion that, in a first relative disposition of the first and second hinge parts, prevents access to said screw and, in a second relative disposition of the first and second hinge parts, permits access to the screw.
8. A hinge according to claim 7 wherein the first hinge part includes a bush that fits between a pair of projections on the second hinge part, each projection including a respective passage with the passages and the bush receiving a pin providing said pivot, one of said projections preventing access to said screw in said first relative position.
9. A hinge according to any one of claims 1 to 8 wherein said relative movement between the first member and the second member permits separation of the first member and the second member so that the second member and the second part can together be disconnected from the first member.
10. A hinge assembly according to claim 9 when dependent on claim 3 or claim 4 wherein the tongue is separable from the groove.

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11. A hinge comprising a first part and a second part interconnected for relative pivotal movement about an axis, the second part comprising a first member fixed relative to the axis and a second member being formed by a bottom member mounted on the first member movable relative to the first member in a direction normal to said axis and a top member carried by the bottom member, providing a fixing for connecting the second part to a surface and being movable relative to the bottom member in said direction normal to said axis.
12. A hinge according to claim 11 wherein said bottom member is movable stepwise relative to said first member in said direction.
13. A hinge according to claim 10 wherein the bottom member and the first member include respective teeth engageable in a plurality of different relative positions to provide said stepwise relative movement in said direction.
14. A hinge according to claim 11 wherein the first member includes a pair of spaced parallel walls, each wall having a row of inwardly directed teeth, the bottom member having two spaced side edges with each side edge carrying a respective row of outwardly directed teeth, each said row of teeth being capable of meshing with a respective row of the teeth of the first member in a plurality of different relative positions.

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15. A hinge according to any one of claims 11 to 14 wherein the top member is slidable relative to said bottom member in said direction.
16. A hinge according to claim 13 wherein a screw adjuster acts between the top member and the bottom member, rotation of said screw adjuster moving said top member relative to the bottom member and said first member in said direction.
17. A hinge according to claim 16 wherein the screw adjuster comprises a screw carried by the top member and engaging with said bottom member.
18. A hinge according to any one of claims 11 to 17 wherein the fixing of the top member is provided by two or more holes for receiving screws.
19. A hinge according to any one of claims 10 to 18 wherein the first member has a greater area than the bottom member and the top member, the first member carrying the top member and the bottom member.
20. A hinge according to claim 19 wherein the first member and the bottom member include respective pairs of parallel slots, the slots of one pair being in register with the slots of the other pair, the top member including a pair of parallel elongate projections each received in a respective one of the slots of each pair of slots to guide the top part in said movement.

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21. A hinge according to claim 20 when dependent on claim 17 wherein said screw holes extend through said projections.
22. A hinge comprising a first part and a second part interconnected for relative pivotal movement about an axis provided by a pin carried by one leaf and passing through a bush in the other leaf, said other leaf carrying removable means for preventing the pin being removed from the bush in an axial direction.
23. A hinge according to claim 22 wherein the pin includes a radially extending annular recess, said means being received in said recess to prevent removal of the pin and being removable from said recess to allow removal of the pin.
24. A hinge according to claim 22 or claim 23 wherein said means comprise a screw carried by said other leaf.
25. A hinge according to any one of claims 22 to 24 wherein the other leaf is formed by a first part and a second part, the first part being movable relative to the second part and providing a fixing for the leaf and the second part carrying said bush.
26. A hinge comprising a first part and a second part interconnected for relative pivotal movement about an axis, removable means being provided acting between the

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first part and the second part for holding the parts in a predetermined fixed relative disposition.
27. A hinge according to claim 26 wherein the first part carries a pin that passes through a bush on the second part to provide said relative pivotal movement, said means acting between the pin and the bush to lock the parts in said fixed relative disposition.
28. A hinge according to claim 26 wherein, in said predetermined fixed relative disposition of the bush and the pin, the bush and the pin form a recess therebetween, said means entering said recess to prevent relative motion between the bush and the pin.
29. A hinge according to claim 28 wherein the bush and the pin include respective elongate part-recesses of semi-circular cross-section extending in respective directions parallel to said axis, the recesses in said predetermined relative disposition c-operating to form an elongate recess of circular cross-section, said means including a rod received in said recess to prevent said relative rotation.
30. A hinge according to claim 29 wherein each part recess is one of a pair of diametrically opposed part recesses, the two pairs of part recesses c-operating to form diametrically opposed circular cross-section recesses in said predetermined

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relative disposition and said means including a pair of spaced rods each received in a respective recess.
31. A hinge according to any one of claims 26 to 30 wherein said pairs of cooperating part recess are one of two or more c-operating pairs of part recess, the cooperating pairs being angularly spaced to provide a corresponding number of predetermined fixed relative dispositions.
32. A hinge substantially as hereinbefore described with reference to the accompanying drawings.