1 Downlight including a ball joint housing FIELD OF THE INVENTION The present invention relates to downlights, and in one form, to downlights where the angle of the downlight can be easily adjusted. 5 BACKGROUND OF THE INVENTION Downlights are lights that are typically installed in a hole in the ceiling with the body of the downlight extending into the ceiling recess. Downlights have for many years included a halogen globe as the light source. In recent years these have been replaced by Light Emitting Diodes (LEDs) as their light source. 0 Whilst downlights are very popular there have a number of disadvantages. Some of these include the ways the lights are installed requiring access into the ceiling space. Other problems include the fact that the light source is mounted in a gimbal so that the direction of the light can be selected. However the gimbal only provides a pivot in one axis and if the light needs to be tilted in a different plane then the whole light including the 5 housing has to be rotated. SUMMARY OF THE INVENTION In a broad aspect the invention could be said to reside in a downlight assembly for installation in a ceiling said assembly including a body and a co-axial clamp ring, a biasing means to bias the clamp ring towards the body, the body and clamp ring adapted 20 to hold a ball joint holding a downlight when in the biased position, wherein when the clamp ring is moved away from the body the ball joint and downlight can be rotated. In preference the ball joint comprises a ball top and a ball bottom. In preference the biasing means are springs are located between the clamp ring and the body and adapted to be compressed to allow for movement between the ball joint 25 and the body. In preference the body includes an outer flange adapted to sealingly engage the ceiling and minimise air flow through the assembly. In preference the body includes outwardly diverging walls.
2 BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate several implementations of the invention and, together with the description, serve to explain the advantages and principles of the invention. In the 5 drawings: Figure 1 shows a front perspective view of a downlight assembly according to one aspect of the invention; Figure 2 shows a rear perspective view of the downlight assembly; Figure 3 shows an exploded rear perspective view of the downlight 0 assembly; Figure 4 shows a side view of the downlight assembly; Figure 5 is a cross-sectional view of the downlight assembly when in a rest position; Figure 6 is a cross-sectional view of the downlight assembly when in an 5 adjustable position; Figure 7 is a cross-sectional view of the downlight assembly when the downlight has been pointed in a non-vertical direction; Figure 8 is a partial detailed view of the assembly as in Figure 7; Figure 9 is the downlight assembly as in Figure 7 but when in a rest position; 20 Figure 10 is a front perspective view of a downlight assembly having a circular base; and Figure 11 is a rear perspective view of the downlight of Figure 10. DESCRIPTION OF THE PREFERRED EMBODIMENTS The following detailed description of the invention refers to the accompanying 25 drawings. Although the description includes exemplary embodiments, other embodiments are possible, and changes may be made to the embodiments described without departing 3 from the spirit and scope of the invention. Wherever possible, the same reference numbers will be used throughout the drawings and the following description to refer to the same and like parts. Dimensions of certain of the parts shown in the drawings may have been modified and/or exaggerated for the purposes of clarity or illustration. 5 Referring now to the Figures and specifically to Figure 1-4 there is illustrated a downlight assembly 10 including a body 12 adapted to house downlight 14 supported in a ball bottom 16 and ball top 18 and held in place by clamp ring 20. The body is of a square configuration having outwardly diverging walls 21. Clamp ring 20 includes apertures 22 adapted to accommodate threaded screws 24 0 that engage female threaded holes 26 in the body 12. The screw heads 28 engage the upper surface 30 of the apertures and press down on the ball top 18 and ball bottom 16 into abutment with correspondingly shaped inner surface 32 of body 12. During assembly the screws are not fully tightened so that ring springs 34 are not completely compressed between the screw heads 28 and the surfaces 30 but act to bias the ball top and bottom 5 towards the body. The configuration of the clamp ring 20 and the body 12 is such that the ball top and ball bottom define a ball joint. The ball joint is effectively clamped sufficiently tightly to prevent the downlight from pivoting around any axis and it stays in its pointed direction. To assist in keeping the assembly 10 in a fixed position within a ceiling space 0 springs 34 are attached to the body 12 through use of brackets 36, the brackets held within slits 38. The base includes an outer lip 30 so that when the assembly is installed into a ceiling the lip engages the front surface of the ceiling and the springs the inner surface of the ceiling as would be well known in the art and not illustrated here. Figures 5 to 9 illustrate the operation of the downlight assembly in so far 25 movement of the downlight is concerned. In Figure 5 the assembly is shown with the downlight pointing essentially vertically downwards. The downlight is held in place by the ring 20 screwed to base 12 and biased into the position using springs 34 that are not fully compressed. This allows a user to engage (not shown) the downlight 14 and the ball joint formed of the ball bottom 16 and ball top 18 by pushing it upwardly away from the 30 body 12. As illustrated in Figure 6 there is now a separation 42 between the ring 20 and the body 12. At this point the user can tilt the downlight and thus the ball joint as 4 illustrated in Figure 7 and in more detail in Figure 8. When the downlight is in the desired position the user effectively releases it whereupon the springs 34 cause the separation 42 to be closed and once again the downlight and the ball joint are held firmly in position as illustrated in Figure 9. 5 The reader should now appreciate that the ball joint can be rotated and pivoted within the assembly thus allowing the user to point the downlight 14 in various directions limited only by physical constraints of the design of the assembly 10. There are other features of the downlight assembly that are present in the Figures. It is not the intention of this specification to describe them in detail since they are well 0 known in the art. These include the various connections 44 for the downlight and the LEDs 46 and alos the configuration of the fins 47 that act as heat sinks. Turning to a further feature of the present application the reader is referred to the specific configuration of the ring 20 and body 12 as best seen in Figure 8. The body 12 includes an internal upwardly extending wall 48 whilst the ring 20 has an external 5 downwardly extending wall 50, both of the walls configured that when in the rest or closed position the walls abut to prevent or at least minimise airflow between the body and the ring. Since the body extends through the ceiling what this mean is that air flow is prevent or minimised from flowing into the ceiling space. This is important since most rooms are these days pressurised due to air conditioning and this prevents the loss of 0 conditioned air. Thus for example during summer when rooms are kept cool, cool air is prevented into moving into the ceiling space thus improving energy efficiency. Of course one also needs to ensure that air does not flow through the downlight and the ball joint. Thus the ball bottom 16 includes a seat 52 that supports the outer edge 54 of the downlight. The abutment between the ball top and bottom is also configured so 25 that when in the rest or biased position there is a prevention or minimisation of air flow. Whether that is achieved by having the surface correspondingly shaped or introducing a seal is not critical and the actual design may be influenced by a number of factors such as space, heat dissipation requirements and so on. It is not intended to limit the downlight assembly to a particular shape. Thus as 30 illustrated in Figure 10 and l Ithe assembly may have a base 12 that is of a circular configuration rather then a square one as in the previous Figures.
5 LIST OF COMPONENTS 10 downlight assembly 12 body 14 downlight 5 16 ball bottom 18 ball top 20 clamp ring 21 outwardly diverging walls 22 apertures in clamp ring 0 24 threaded screws 26 female threaded holes 28 screw heads 30 upper surface of apertures 32 inner surface of body _5 34 springs 36 brackets 38 slits 40 lip 42 separation 20 44 connections 46 LEDs 47 fins 6 48 internal body wall 50 external ring wall 52 seat in ball bottom 54 outer edge of downlight 5 Further advantages and improvements may very well be made to the present invention without deviating from its scope. Although the invention has been shown and described in what is conceived to be the most practical and preferred embodiment, it is recognized that departures may be made therefrom within the scope and spirit of the invention, which is not to be limited to the details disclosed herein but is to be accorded 0 the full scope of the claims so as to embrace any and all equivalent devices and apparatus. The reference to any prior art in this specification is not, and should be not taken as, an acknowledgment of any form of suggestion that such prior art forms part of the common general knowledge. In any claims that follow and in the summary of the invention, except where the 5 context requires otherwise due to express language or necessary implication, the word "comprising" is used in the sense of "including", i.e. the features specified may be associated with further features in various embodiments of the invention.