Abstract:
A hinge comprising two pivoting elements adapted to hingedly join two articles, each pivoting element including attachment means for attaching to an article; wherein when attached to the two articles the hinge is rotatable with respect to the articles.

Description:
FIELD OF THE DISCLOSURE 
     The disclosure relates to a hinge. 
     SUMMARY OF THE DISCLOSURE 
     Disclosed is a hinge comprising two pivoting elements adapted to hingedly join two articles, each pivoting element including attachment means for attaching to an article; wherein when attached to the two articles the hinge is rotatable with respect to the articles. 
     In one form the hinge is rotatable with respect to the articles such that the direction of freedom of movement of the hinge is changed 
     In one form the hinge further comprises a hinge pin. 
     In one form the attachment means comprises a hinge collar adapted to be attached to one of the two articles, wherein the hinge is rotatable with respect to the hinge collar. 
     In one form the axis of rotation of the pivoting elements and the axis of rotation of the hinge are perpendicular to one another. 
     In one form the hinge is rotatable between a locked position and an unlocked position 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       To facilitate an understanding of the disclosure, reference is made in the description to the accompanying drawings illustrating a preferred embodiment of the hinge used in a folding chess board. It is to be understood that the hinge is not limited to the preferred embodiment as illustrated in the drawings. 
       In the drawings: 
         FIG. 1  is an exploded perspective view of the hinge of one embodiment of the present invention; 
         FIG. 2  is a front view of the hinge of  FIG. 1  without attachment means; 
         FIG. 3  is a top view of the hinge of  FIG. 2 ; 
         FIG. 4  is a side elevation view of the hinge of  FIG. 2 ; 
         FIG. 5  is a perspective view of the hinge of  FIG. 2 ; 
         FIG. 6  is a perspective view of the hinge of  FIG. 2  with the hinge element in a second position; 
         FIG. 7  is a perspective view of the hinge of  FIG. 2  with the collar in a second position; 
         FIG. 8  is an exploded perspective view of the hinge of  FIG. 1 ; 
         FIG. 9  is a perspective view of the hinge of  FIG. 8  in a first position; 
         FIG. 10  is a perspective view of the hinge of  FIG. 8  in a second position; 
         FIG. 11  is a side exploded view of the hinge of  FIG. 8 ; 
         FIG. 12  is a side view of the hinge of  FIG. 8  in a first position; 
         FIG. 13  is a side view of the hinge of  FIG. 8  in a second position; 
         FIG. 14  is a cross-sectional exploded side view of a hinge element of a second embodiment of the invention; 
         FIG. 15  is a cross-sectional side view of the hinge of  FIG. 14 ; 
         FIG. 16  is an exploded front view of the hinge of  FIG. 14 ; 
         FIG. 17  is a front view of the hinge of  FIG. 14 ; 
         FIG. 18  is an exploded perspective view of the hinge of  FIG. 14 ; 
         FIG. 19  is an exploded perspective view of the hinge of  FIG. 14 ; 
         FIG. 20  is a perspective view of the hinge of  FIG. 14 ; 
         FIG. 21  is a perspective view of the hinge of  FIG. 14 ; 
         FIG. 22  is a perspective view of the hinge of one embodiment of the present invention in use; 
         FIG. 23  is a perspective view of the hinge of  FIG. 22  in use in a second position; 
         FIG. 24  is a perspective view of the hinge of  FIG. 22  in use in a third position; 
         FIG. 25  is a perspective view of the hinge of  FIG. 22  in use in a fourth position; 
         FIG. 26  is a cross-sectional top view of an embodiment of the hinge in locked position in use; and 
         FIG. 27  is a cross sectional bottom view of the hinge of  FIG. 26 . 
     
    
    
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
     Referring to the figures, there is shown a hinge  1  for allowing a relative motion between two solid articles. In the embodiment shown in the figures the solid articles are in the form of two chess board halves  30 . 
     The hinge  1  comprises two pivoting elements  3 . Each of the two independent pivoting elements  3  is attached to a hinge pin  4  such that at least one of the two independent pivoting elements is rotatable about the hinge pin  4 . The two independent pivoting elements  3  are therefore rotatable in respect of one another. 
     Each of the two pivoting elements  3  further comprise a rotatable attachment means including connector  5 , shaft  6  and collar  11 . 
     The two pivoting elements  3  are moveable with respect to one another. As a result articles  30  attached with the pivoting elements  3  are moveable with respect to one another. 
     The connectors  5  are adapted to be fitted into the two solid articles  30 , such that the two solid articles  30  extend outwardly from the connectors  5 . As seen in  FIGS. 22 through 25 , in this form movement of the pivoting elements  3  brings the two solid articles  30  from a parallel and adjacent position as shown in  FIG. 22  to a colinear position as shown in  FIG. 25 . 
     The shaft  6  adds strength and length to the hinge  1  to bear the load of the solid articles  30  beyond the pivoting elements  3 . 
     Each hinge collar  11  is adapted to be rotatably attached with connector  5 . Shaft  6  is provided with a screw thread or other means to engage with connector  5 . Hinge collar  11  is positioned about shaft  6  or connector  5 . The hinge  1  and connectors  5  can thus rotate with respect to the collars  11 . The collars  11  are shaped to curve over the hinge element but can be any shape. 
     As shown in  FIGS. 26 and 27 , the hinge collar  11  is attached to the solid articles  30  by way of set screws or other attachment means  26  and  27 . Each shaft  6  sits in a bearing tube  7  inset into each solid article  30 . Shaft  6  is able to rotate in bearing tube  7 . The hinge  1  and the connectors  5  are thus rotatable with respect to the solid articles  30  about the axis of the shafts  6 . 
     The hinge  1  is rotatable such that the direction of freedom of movement of the pivoting elements  3  with respect to the solid articles  30  is changed. This change in the direction of freedom of movement of the pivoting elements  3  with respect to the solid articles  30  allows the solid articles  30  to move in varying planes with respect to one another. 
     In effect, the pivoting elements  3  move such that the hinge pin  4  acts as an axis of rotation. When the hinge  1  is rotated through 90 degrees, the hinge pin  4  and the pivoting elements&#39;  3  axis of rotation is rotated through 90 degrees. As a result the freedom of movement of the hinge is shifted through 90 degrees. Depending upon the size and shape of the solid articles  30  this results in the solid articles being moveable with respect to one another in a different plane or, in certain circumstances means the hinge  1  and pivoting elements  3  are locked so that the solid articles  30  cannot move with respect to one another. That is the hinge  1  is in a locked position. 
     The locked and unlocked hinge positions are best shown in use in a flat solid article such as two chess board halves. This is best shown in  FIGS. 22 through 25 . 
     In the locked position shown in  FIG. 25 , the orientation of the hinge  1  with respect to the solid articles  30  restricts the movement of the pivoting elements  3  with respect to one another. In the locked position the axis of rotation of the pivoting elements  3  is perpendicular to the only available axis of rotation of the solid articles  30 . As a result the solid articles  30  are fixed in position in relation to one another. 
     The collar  11  is attached to or set into the articles  30  being hinged. Each collar  11  is inset on one side of the ridge  15  extending between the articles  30 . Because the collar  11  is set into the two articles  30  the hinge  1  can be flush with the articles  30 . 
     In use, in order to unlock the hinge  1 , a user rotates the hinge  1  with respect to the articles  30 . This rotates the connectors  5  and connecting shafts  6  in relation to the articles  30 . The collar  11 , on the other hand, is fixed with respect to the articles  30 . The hinge element  2  can be rotated with respect to the articles  30 . 
     The hinge can be rotated 90 degrees. A ridge  15  associated with the connectors  5  and an inset portion  16  associated with the collar interact to stop the hinge  1  from rotating an angle greater than 90 degrees. 
     In other forms the hinge can be rotated through up to 360 degrees by incorporating a ridge which interacts to stop the hinge from rotating more than 180 degrees, 270 degrees or any angle. When no ridge is incorporated the hinge can be rotated 360 degrees. When the hinge can be rotated through 360 degrees the direction of freedom of movement can be rotated through 360 degrees, allowing the solid articles  30  to move in varying planes with respect to one another. 
     In use, the position of the hinge  1  in the hinged article and the opening movement of the hinge  1  prevents the meeting of the articles  30  joined by the hinge  1  along the ridge  15 . There is therefore no crunching or grinding or opportunity of wear between chess board halves along the ridge  15 . 
     Further, the hinge  1  allows for no hyperextension beyond the position determined as the home position. When the connectors  5  are collinear to one another the pivoting elements  3  meet to prevent hyperextension of the hinge  1 . 
     The collar  11  and hinge element  2  allows for staged fitting, whereby the collar  11  is attached to the hinged article. Subsequently the hinge element is attached. 
     The hinge element  2  is composed of metal, plastic or any other rigid durable substance. 
     In another embodiment, the centre of gravity of the hinge element is positioned such that gravity is utilised to automate the rotation of the hinge element  2  within the collar. In another form the rotation of the hinge is actuated automatically by a motor, spring, magnet or other external means. 
     In the embodiment described above, the two solid articles  30  comprise chess board halves. In other embodiments the two solid articles  30  may comprise any two solid articles requiring movement in respect to one another, for example scaffolding, flooring, two panels of an articulated dividing screen, a board game board, cupboard doors, and advertising panels.