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Title:
AN ELECTRICAL MOUNTING RAIL PORTION
Document Type and Number:
WIPO Patent Application WO/2019/119033
Kind Code:
A1
Abstract:
An electrical mounting rail portion (100) has an elongate body (120) to which an electrical device (200) is mountable at two or more different angular orientations about the elongate body (120). The rail portion (100) also has elongate electrical conductors (140) that are located on the elongate body (120) and that extend along a length of the elongate body (120) in a direction substantially parallel to a central axis through the elongate body (120), the electrical conductors (140) for powering the electrical device (200) when mounted at any one of the two or more different angular orientations and at any one of a plurality of locations along a length of the electrical conductor (140).

Inventors:
MURRAY, Michael
TREACY, Daniel
Application Number:
AU2018/051354
Publication Date:
June 27, 2019
Filing Date:
December 19, 2018
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
WONGAN PTY LTD AS THE TRUSTEE FOR THE AUTHENTIC DESIGN TRUST (4 Ardena Court, Bentleigh East, Victoria 3165, 3165, AU)
International Classes:
F21V21/35; H01R25/14
Foreign References:
DE102004042049A12006-03-02
US20140268835A12014-09-18
US5455754A1995-10-03
US5833358A1998-11-10
US6246182B12001-06-12
Attorney, Agent or Firm:
DAVIES COLLISON CAVE PTY LTD (Level 15, 1 Nicholson StreetMelbourne, Victoria 3000, 3000, AU)
Download PDF:
Claims:
CLAIMS

1. An electrical mounting rail portion including:

an elongate body to which an electrical device is mountable at two or more different angular orientations about the elongate body; and

elongate electrical conductors that are located on the elongate body and that extend along a length of the elongate body in a direction substantially parallel to a central axis through the elongate body, the electrical conductors for powering the electrical device when mounted at any one of the two or more different angular orientations and at any one of a plurality of locations along a length of the electrical conductor.

2. The electrical mounting rail portion of claim 1, wherein the electrical device is mountable to the elongate body at one of a forward-facing orientation and at a rearward-facing orientation.

3. The electrical mounting rail portion of claim 1 or 2, wherein two or more electrical devices can be connected to the same electrical conductor at different locations along the length of the electrical conductor. 4. The electrical mounting rail portion of any one of claims 1 to 3, wherein the elongate electrical conductors are spaced evenly apart from each other on the elongate body about the central axis of the elongate body.

5. The electrical mounting rail portion of any one of claims 1 to 4, wherein the body includes grooves to which the electrical device is mountable, at least one of the elongate electrical conductors being located in a respective one of the grooves.

6. The electrical mounting rail portion of claim 5, further including a non-conductive polymer strip in the groove, the at least one of the electrical conductors being arranged to rest against or within the strip in the respective one of the grooves.

7. The electrical mounting rail portion of claim 6, wherein the strip partially wraps around the electrical conductor while leaving a portion of the electrical conductor exposed for electrically connecting to the electrical device.

8. The electrical mounting rail portion of any one of claims 5 to 7, wherein each groove has a profile that is substantially symmetrical about an axis of symmetry that coincides with the central axis of the elongate body.

9. The electrical mounting rail portion of any one of claims 5 to 8, wherein the at least one elongate electrical conductors engages the respective one of the grooves in a snap-fit engagement.

10. The electrical mounting rail portion of any one of claims 5 to 9, wherein the grooves have a cross-sectional area that tapers into the elongate body.

11. The electrical mounting rail portion of any one of claims 5 to 10, wherein each groove has an enlarged portion along its depth for trapping the at least one electrical conductor in the groove.

12. The electrical mounting rail portion of any one of claims 1 to 11, wherein the body includes a reinforcing structure in an interior of the body.

13. The electrical mounting rail portion of claim 12, further including a marker for identifying an orientation of the reinforcing structure.

14. The electrical mounting rail portion of claims 1 to 13, further including a control module for controlling a voltage across the electrical conductors.

15. An electrical assembly including the mounting rail portion of any one of claims 1 to 14 and the electrical device.

16. The electrical assembly of claim 15, wherein, when the electrical device is mounted to the elongate body of the mounting rail portion at an orientation at a particular location along the central axis, another electrical device can be mounted to the elongate body at another orientation at the same particular location.

17. The electrical assembly of claim 15 or 16, wherein the electrical device includes a rectifier wherein, when the electrical device is mounted to the elongate body, the rectifier controls a direction of current flow from the electrical conductors through the el ectri cal devi ce .

18. The electrical assembly of any one of claims 15 to 17, wherein the electrical device is another electrical mounting rail portion according to any one of claims 1 to 14 to which one or more other electrical devices are mountable.

19. The electrical assembly of claim 18, wherein the another electrical mounting rail portion has an elongate body that is transverse to the elongate body of the electrical rail mounting portion when mounted thereto. 20. The electrical assembly of any one of claims 15 to 19, wherein the electrical device is a luminaire.

21. The electrical assembly of claim 20, wherein the luminaire has a control module, a memory device storing a digital address of the luminaire, and an electric light, the control module being configured to:

receive a control signal containing a digital address of a target luminaire and a desired intensity of the target luminaire;

determine if the digital address of the target luminaire corresponds to the digital address stored in the memory device; and

if the target digital address corresponds to the stored digital address, adjust an intensity of the electric light based on the desired intensity.

22. The electrical assembly of any one of claims 15 to 21, wherein the electrical device includes a clamp for connecting, mechanically and electrically, the electrical device to the elongate body.

23. A clamp for mechanically and electrically connecting an electrical device to an electrical mounting rail having electrical conductors, the clamp including:

an electrically conductive first leg arranged to be in electrical communication with the electrical device, the first leg having a contact portion for electrically contacting one of the electrical conductors of the electrical mounting rail, and

an electrically conductive second leg, electrically isolated from the first leg, the second leg arranged to be in electrical communication with the electrical device, the second leg having a contact portion for electrically contacting another one of the electrical conductors of the electrical mounting rail,

wherein the electrical device is rotatable relative to the electrically conductive legs, and

wherein a distance between the first and second legs is adjustable for clamping to the electrical mounting rail and, at the same time, for embracing a portion of the electrical device to prevent rotation of the electrical device relative to the electrically conductive legs.

24. The clamp of claim 23, wherein the electrical mounting rail includes an elongate body with grooves in which the electrical conductors are provided, the grooves being evenly spaced apart from each other on the elongate body and having a depth along a radius of the elongate body,

each of the first and second legs having a toe on which the contact portion is provided, the toes extending from the leg in an inward direction towards each other, each toe extending in a radial direction into the elongate body when mounted to the elongate body.

25. The clamp of claim 24, wherein the electrical device includes a track defining a swiveling range of the electrical device and at least one of the first and second legs includes a guide for engaging the track.

26. A portable luminaire assembly including:

a portable base;

an electrical mounting rail portion extending from the portable base, the electrical mounting rail portion having

an elongate body to which an electrical device is mountable and

elongate electrical conductors that extend along a length of the elongate body and that are substantially parallel to a central axis through the elongate body, the electrical conductors for powering the electrical device when mounted at any one of a plurality of locations along a length of the electrical conductor.

27. The portable luminaire assembly of claim 26, wherein the electrical mounting rail portion is the electrical mounting rail portion of any one of claims 1 to 14. 28. An electrical mounting rail portion substantially as herein described with reference to the accompanying drawings.

29. An electrical assembly or a portable luminaire assembly substantially as herein described with reference to the accompanying drawings.

30. A clamp substantially as herein described with reference to the accompanying drawings.

Description:
AN ELECTRICAL MOUNTING RATE PORTION

FIELD

[0001] The present invention relates to an electrical mounting rail portion for mounting electrical devices. The mounting rail portion may be used to mount luminaires and/or other light fixtures. Also, the mounting rail portion may be used as part of a portable luminaire assembly, a wall-mounted lamp assembly, or a ceiling-mounted assembly.

BACKGROUND

[0002] Existing lighting rails, to which a light can be mounted, have complex mounting arrangements. These existing light rails make it restrictive for installation and for a user to connect a light to the rail.

[0003] It is not admitted that any of the information in this patent specification is common general knowledge, or that the person skilled in the art could be reasonably expected to ascertain or understand it, regard it as relevant or combine it in any way before the priority date.

SUMMARY

[0004] Embodiments of the present invention seek to provide an electrical mounting rail portion and a clamp therefor that addresses the disadvantages described above. The present invention also seeks to at least provide the public with a useful choice.

[0005] An aspect of the present invention provides an electrical mounting rail portion including:

an elongate body to which an electrical device is mountable at two or more different angular orientations about the elongate body;

elongate electrical conductors that are located on the elongate body and that extend along a length of the elongate body in a direction substantially parallel to a central axis through the elongate body, the electrical conductors for powering the electrical device when the electrical device is mounted at any one of the two or more different angular orientations and at any one of a plurality of locations along a length of the electrical conductor.

[0006] The electrical device may be mountable to the elongate body at one of a forward-facing orientation and at a rearward-facing orientation. [0007] The elongate electrical conductors may include a plurality of pairs of elongate electrical conductors, wherein the electrical device is powered when connected to any one of the pairs of electrical conductors. The electrical device can preferably also be powered when connected to one elongate electrical conductor of one pair and one elongate electrical conductor of another pair. The two electrical conductors to which the electrical device is connected have opposite polarities to each other.

[0008] A position of the electrical device may be adjustable along the length of the electrical conductor.

[0009] Two or more electrical devices may be connected to the same electrical conductor at different locations along the length of the electrical conductor.

[0010] The elongate electrical conductors may be spaced evenly apart from each other on the elongate body about the central axis of the elongate body. Thereby, an electrical device having two electrical contact portions that have a fixed position can connect to any two spaced apart electrical conductors at different angular orientations about the elongate body.

[0011] The elongate body may have a substantially symmetrical profile. The profile is preferably rotationally symmetrical. The substantially symmetrical profile allows the same electrical device to be mounted either at one of the angular orientations or at another one of the angular orientations.

[0012] The elongate body may include grooves to which the electrical device is mountable, at least one of the elongate electrical conductors being located in a respective one of the grooves. A non-conductive polymer strip may be provided in the groove, wherein the at least one of the electrical conductors is arranged to rest against or within the strip in the respective one of the grooves. The strip may, for example, partially wrap around the electrical conductor to electrically insulate the electrical conductor from the eleongate body while leaving a portion of the electrical conductor exposed for electrically connecting to the electrical device. The strip may be a silicone packer strip as an example. The strip may engage the groove in a snap-fit engagement. Each groove preferably has a profile that is substantially symmetrical about an axis of symmetry that coincides with the central axis of the elongate body. Like the elongate electrical conductors, the grooves are also preferably spaced evenly apart from each other on the elongate body about the central axis of the elongate body. Thereby, an electrical device having two electrical contact portions that have fixed orientations can engage any two spaced apart grooves for mounting at different angular orientations about the elongate body.

[0013] The at least one elongate electrical conductors may engage the respective one of the grooves in a snap-fit engagement. The grooves preferably have a cross-sectional area for holding the elongate electrical conductor and, where provided, the non-conductive polymer strip. The cross-section of each respective groove may, for example, taper into the elongate body. Each groove may have an enlarged portion along its depth for trapping the at least one electrical conductor in the groove.

[0014] The elongate body may include a reinforcing structure in an interior of the elongate body. The reinforcing structure is preferably a bar of carbon fiber. The reinforcing structure may alternatively include a bar of stainless steel. The electrical mounting rail portion preferably includes a marker for identifying an orientation of the reinforcing structure. The marker is preferably provided on an exterior surface of the elongate body.

[0015] The electrical mounting rail portion may include a control module for controlling a voltage across the electrical conductors. The control module preferably includes an intensity module for providing a control signal to the electrical device containing a desired intensity for the electrical device. The intensity module may include a wireless communications module for transmitting the control signal to the electrical device using wireless communication. The intensity module may alternatively or additionally include an encoder for encoding the control signal in the voltage across the electrical conductors.

[0016] According to another aspect, the present invention provides an electrical assembly including the electrical mounting rail portion according to the aspect described above and the electrical device.

[0017] When the electrical device is mounted to the elongate body of the mounting rail portion at an orientation at a particular location along the central axis, another electrical device may be mounted to the elongate body at another orientation at the same particular location.

[0018] The electrical device may include a rectifier wherein, when the at least one electrical device is mounted to the elongate body, the rectifier controls a direction of current flow from the electrical conductors through the electrical device. The rectifier is preferably a diode bridge.

[0019] The electrical device may be another electrical mounting rail portion according to the aspect of the invention described above to which one or more other electrical devices are mountable. The another electrical mounting rail portion preferably has an elongate body that is transverse to the elongate body of the electrical rail mounting portion when mounted thereto.

[0020] The electrical device may be a luminaire. The luminaire preferably has a control module, a memory device storing a digital address of the luminaire, and an electric light, the control module being configured to:

receive a control signal containing a digital address of a target luminaire and a desired intensity of the target luminaire;

determine if the digital address of the target luminaire corresponds to the digital address stored in the memory device; and

if the target digital address corresponds to the stored digital address, adjust an intensity of the electric light based on the desired intensity.

[0021] The control module of the luminaire may include a wireless communication module for receiving the control signal using wireless communication. The control signal may be encoded in a voltage across the electrical conductors, and the control module of the luminaire may additionally or alternatively include a decoder for decoding the voltage across the electrical conductors to obtain the control signal.

[0022] The electrical device may include a clamp for connecting, mechanically and electrically, the electrical device to the elongate body.

[0023] Another aspect of the present invention provides a clamp for mechanically and electrically connecting an electrical device to an electrical mounting rail having electrical conductors, the clamp including:

an electrically conductive first leg arranged to be in electrical communication with the electrical device, the first leg having a contact portion for electrically contacting one of the electrical conductors of the electrical mounting rail, and

an electrically conductive second leg, electrically isolated from the first leg, the second leg arranged to be in electrical communication with the electrical device, the second leg having a contact portion for electrically contacting another one of the electrical conductors of the electrical mounting rail,

wherein the electrical device is rotatable relative to the electrically conductive legs, and

wherein a distance between the first and second legs is adjustable for clamping to the electrical mounting rail and, at the same time, for embracing a portion of the electrical device to prevent rotation of the electrical device relative to the electrically conductive legs.

[0024] The electrical mounting rail preferably includes an elongate body with grooves in which the electrical conductors are provided, the grooves being evenly spaced apart from each other on the elongate body and each groove has a profile that is substantially symmetrical about an axis of symmetry that coincides with a central axis of the elongate body. For this rail, each of the first and second legs may have a toe on which the contact portion is provided, the toes extending from the leg in an inward direction towards each other, each toe extending in a radial direction into the elongate body when mounted to the elongate body.

[0025] The first and second legs may be coated with an electrical insulation except for an area where the contact portions are located. The electrical insulation is preferably an anodised coating.

[0026] The clamp may further include a fastener extending through the first leg and threadably engaging the second leg, wherein the fastener is adjustable to adjust the distance between the first leg and the second leg. The fastener is preferably made from metal such as high tensile steel or stainless steel for example. The fastener is preferably electrically isolated from the first and second legs. For example, an electrical insulation could be provided between the fastener and a bore in the legs in which the fastener is provided. The electrical insulation may be an anodised coating. Alternatively, the fastener may be made from a non-conductive material.

[0027] Each leg may include a passage for containing an electrical portion connecting to the electrical device, and a fastener for pressing the electrical portion against a wall of the passage. The fastener is adjustable to allow the electrical portion to be removed from the passage. The fastener ensures an electrical connection between the electrical portion and the respective leg.

[0028] The electrical device has a neck with an enlarged head connected thereto, the legs preferably being configured to embrace the neck to allow or inhibit rotation of the electrical device while trapping the enlarged head in a space between the legs. The electrical device preferably includes a track defining a swiveling range of the electrical device and at least one of the first and second legs includes a guide for engaging the track. The track preferably has an arc shape. The track defines a rotation angle of the rotation device from 0° up to about 350°. The angle of rotation may alternatively be up to about 270°.

[0029] Another aspect of the present invention provides a portable luminaire assembly including:

a portable base;

an electrical mounting rail portion extending from the portable base, the electrical mounting rail portion having

an elongate body to which an electrical device is mountable and

elongate electrical conductors that extend along a length of the elongate body and that are substantially parallel to a central axis through the elongate body, the electrical conductors for powering the electrical device when mounted at any one of a plurality of locations along a length of the electrical conductor.

[0030] The electrical mounting rail portion may be the electrical mounting rail portion described previously above. The control module of the electrical mounting rail portion described previously above may be housed within the portable base.

[0031] The portable luminaire assembly is preferably a portable floor lamp assembly. Alternatively, the portable luminaire assembly may be a desk lamp for example.

[0032] The portable base preferably includes a control module for powering the electrical device mounted to the electrical mounting rail portion. The electrical device may include one or more luminaires, and the control module may be configured for controlling the intensity of the luminaire(s). Where the electrical device includes a plurality of luminaires, the control module is configured to power and/or adjust the intensity of the luminaires individually, or a group of two or more of the luminaires, or all of the luminaires.

[0033] As used herein, the term‘and/or’ means‘and’, ‘or’, or both. In a list that specifies two or more features with the term‘and/or’, at least one of those features may be present.

BRIEF DESCRIPTION OF DRAWINGS

[0034] An embodiment of the invention will now be described, by way of non-limiting example only, with reference to the accompanying drawings in which:

FIGURE 1 shows a side view of an electrical mounting rail portion according to an embodiment of the present invention;

FIGURE 2 shows a sectional view of the electrical mounting rail portion of FIGURE 1 with a schematic of an electrical device;

FIGURE 3 shows a top view of the electrical mounting rail portion of FIGURE 1;

FIGURE 4 shows a sectional view of the electrical mounting rail portion along lines A-A in FIGURE 3;

FIGURE 5 shows a sectional view of the electrical mounting rail portion along lines B-B in FIGURE 3;

FIGURE 6 shows a schematic of the electrical mounting rail portion of FIGURE 1 with electrical devices;

FIGURE 7 shows an assembly with electrical mounting rail portion of FIGURE 1; and FIGURE 8 shows a portable luminaire assembly according to an embodiment of the present invention.

DESCRIPTION OF EMBODIMENTS

[0035] Referring to Figures 1 and 2, an electrical mounting rail portion 100 has an elongate body 120 and elongate electrical conductors 140 along the elongate body 120. As used herein, the term 'electrical mounting rail portion' includes a track or bus-bar. An end of the rail 120 has a mount (not shown) for mounting the rail to a ceiling, floor, or wall in a space, for mounting to a portable base, or for mounting to another rail. An electrical device 200 can be mounted to the elongate body at two or more different angular orientations X, Y about the elongate body 120 and receive power via the elongate electrical conductors 140. The electrical device 200 may be a luminaire or another electrical mounting rail portion.

[0036] The elongate body 120 is substantially cylindrical with a substantially circular profile. The elongate body 120 has a substantially symmetrical profile. The symmetrical profile allows the user to change the mounting of the electrical device 200 from one angular orientation X to another angular orientation Y about the elongate body 120. The elongate body 120 has a diameter of about 20mm. The elongate body 120 may be of any length depending on the environment in which the elongate body 120 is to be provided. By way of example, the length of the elongate body can be, but not limited to, lm, 2m, or 3m. The elongate body 120 is made from extruded aluminium. An exterior surface of the elongate body 120 is electrically insulated. In this embodiment, the elongate body 120 has an anodised surface treatment. The elongate body 120 can be mounted at least vertically or horizontally.

[0037] The elongate body 120 has grooves 122 for containing the electrical conductors 140. Each groove 120 contains one of the electrical conductors 140. The grooves 122 have a shape for holding the electrical conductors 140 and a non-conductive polymer strip 160 (which will be discussed in further detail below). The groove 122 has an opening on the external surface of the elongate body 120 having a width of about 2.2m, and narrows down into the elongate body 120 to about l.3mm to define a pinch-point for keeping the electrical conductors 140 in the groove. In other embodiments, the grooves do not narrow down to define a pinch point. The shape of the grooves provides a snap-fit engagement of the elongate electrical conductors 140. The grooves have an enlarged portion along the depth of the groove for trapping the electrical conductor within the groove.

[0038] The grooves 122 have a profile that is substantially symmetrical about an axis of symmetry that coincides with a central axis of the elongate body 120. The grooves 122 have a depth of about 3.5mm. The grooves 122 are also spaced evenly apart from each other on the elongate body 120 about the central axis of the elongate body 120. This arrangement allows the electrical device 120 having two electrical contact portions 220 that have a fixed position to engage any two spaced apart grooves 122. Thereby, the same electrical device 200 can be mounted to the elongate body 120 and electrically connected to the electrical conductors 140 at different angular orientations X, Y about the elongate body 120.

[0039] A non-conductive polymer strip 160 is provided in each groove 122. The strip 160 is a silicone packer strip as one example. The electrical conductor 140 is arranged to rest against the packer strip 160. The strip 160 provides some biasing to the electrical conductor to provide pressure and ensure electrical connectivity between the electrical conductor 140 and the electrical contact portions 220 of the electrical device 200 when connected. The strip 160 engages the groove in a snap-fit engagement. In other embodiments, the electrical packer strip may contain the electrical conductor. In yet other embodiments, a strip 160 may not be provided and each elongate electrical conductor 140 may rest against a bottom of the groove 122.

[0040] The elongate body 120 contains a reinforcing structure in the form of a carbon fiber bar 124. The carbon fiber bar 124 is encased in the interior of the elongate body 120 to increase the rigidity and stiffness of the elongate body 120. A marker 126 is provided on an exterior surface of the elongate body 120 to indicate the orientation of the carbon fiber bar 124 in the elongate body 120. The marker 126 allows the user to ensure the that the elongate body 120 is properly orientated such that the carbon fiber bar 124 is in its strongest direction of loading particularly when the carbon fiber bar 124 is vertically mounted. In other embodiments, the reinforcing structure may include a stainless steel bar instead or in addition to the carbon fiber bar.

[0041] The elongate electrical conductors 140 are made from soft-annealed copper. In the embodiment shown in Figures 1 and 2, the electrical mounting rail portion has four elongate conductors 140 that are evenly spaced apart from each other on the elongate body 120 about a central axis of the elongate body 120. This arrangement allows for the electrical device 200 having two electrical contact portions 220 that have a fixed position to connect to any two spaced apart electrical conductors at different angular orientations X, Y about the elongate body 120. By the electrical conductors 140 being located on the elongate body 120, the electrical conductors 140 are supported on an external surface of the elongate body 120. This arrangement provides more accessibility of the electrical conductors to the user for connecting an electrical device thereto. The elongate electrical conductors 140 have a diameter, which is generally similar, preferably slightly larger than, the pinch-point of the groove 122.

[0042] Each one of the elongate electrical conductors 140 has an opposite polarity to an adjacent elongate electrical conductor 140 about the elongate body 120. In the embodiment shown in Figures 1 and 2, the elongate electrical conductors 140 have two electrical conductors with positive polarity and two electrical conductors with negative polarity. Electrical conductors 140 of the same polarity are connected to each other. The electrical device 200 is powered when connected to two adjacent electrical conductors. As will be discussed in further detail below, the electrical device 200 may include a rectifier for controlling the direction of current flow though the electrical device such that the contact potions of the electrical device 200 can be connected to the electrical conductors 140 without the user having to identify the polarity of the electrical conductors 140.

[0043] The elongate electrical conductors 140 run along the elongate body substantially parallel to a longitudinal axis (or central axis) of the elongate body 120 and have a length corresponding to the elongate body 120. The electrical conductors may in some embodiments be shorter than the elongate body. Electrical conductos of matching polarity are physically connected to each other or bridged together at or near an end of the elongate body 140.

[0044] The electrical device 200 can connect to the electrical conductors 140 at a plurality of locations along a length of the electrical conductor. In particular, the electrical conductors 140 are exposed at least during installation along its length to allow the electrical device 200 to connect at any location along its length. A cover may be provided to conceal the unused portions of the electrical conductor 140 after installation. Thereby, during installation, a position of the electrical device can be adjusted to any location along the length of the electrical conductor. In addition, two or more electrical devices 200 can connect to the same electrical conductor at different locations along the length of the electrical conductor.

[0045] This arrangement of the elongate electrical conductors 140 being on the elongate body and substantially parallel to the longitudinal axis allows for the mounting rail portion 100 to be easily manufactured. In addition, this arrangement provides more freedom to the user to customise the overall visual aesthetic appearance of the assembly and, where the electrical device includes a luminaire, provides more freedom to the user to customise the lighting effect. For example, with this arrangement, the user can locate the electrical device at any location along the length of the elongate body while maintaining its angular orientation. In addition, with this arrangement and with the clamp of the electrical device 200 (described in further detail below), the location of the electrical device on the elongate body can be readily and easily adjusted by the user by loosening the clamp such that the electrical device can be completely removed from the elongate body or such that the electrical device can slide along the elongate body, relocating the electrical device to the desired location along the length of the elongate body, and fastening the clamp to secure the electrical device to the elongate body.

[0046] Referring to Figures 3 to 5, the electrical device includes a clamp for connecting, mechanically and electrically, the electrical device to the elongate body 120.

[0047] The clamp has a pair of first and second electrically conductive legs 220. The legs 220 are made from aluminium and are anodised over most of its surface except in an area that is configured to electrically contact the electrical conductors. This area is the electrical contact portion 222 of the electric device 200. By anodizing the surface of the legs, the legs of the clamp 220 are electrically isolated from each other. A distance between the first and second legs of the clamp 200 is adjustable for clamping to the electrical mounting rail.

[0048] Each leg 220 includes a toe 222 for engaging the grooves 122 of the elongate body 120. The toes 222 of the two legs 220 extend inwardly towards each other. Each toe 222 in particular extends in a direction corresponding to a radial direction of the elongate body 120 when the leg 220 is mounted to the elongate body 120. Thereby, legs 220 can be mounted to the elongate body 120 and the toes can engage the groove 122 at different orientations about the elongate body 120.

[0049] Referring to Figure 4, each leg of the clamp 200 has a passage 224 for receiving a wire 240 connecting to the electric circuit of the electrical device 200 and a fastener 226, in the form of a grub screw, that presses the wire against a wall of the passage 224 in order to ensure an electrical connection between the wire and the leg of the clamp. [0050] Referring to Figure 5, the clamp 220 includes a pair of fasteners 228, in the form of screws, which are used to adjust a distance between the fist and second legs and to clamp the legs onto the grooves 122 of the elongate body 120. The fastener 228 passes through the first leg and threadably engages the second leg. Thereby, rotation of the fastener causes the second leg to move toward or away from the first leg. The fastener 228 is made from high-tensile steel or stainless steel. A surface of the bore in the first and second legs in which the fastener is provided with an electrical insulation to electrically isolate the fastener 228 from the legs of the clamp 220. In some embodiments, the fastener may be made from a non-conductive material.

[0051] The electrical device 200 can be swiveled relative to the clamp. Thereby, where the electrical device 200 is a luminaire, an illumination direction provided by the luminaire can be adjusted when mounted at one of the angular orientations about the rail. The electrical device 200 is provided with a neck 201 that is embraced by the legs 220 of the clamp and an enlarged head 203 that is trapped in a space between the legs 220. To swivel the electrical device 200 about the clamp, the fasteners 228 are loosened to space the legs apart 220 from the neck 201 to allow the electrical device 200 to be rotated about the clamp, while keeping the enlarged head 203 trapped in the space between the legs 220. Once the electrical device 200 is in its desired orientation, the fasteners 228 are tightened such that the legs 220 will embrace the neck 201 of the electrical device 200 and prevent further swiveling. The electrical device 200 has a track 205 that defines a swiveling range of the electrical device 200. A first leg 220 of the clamp has a guide 223 for engaging the track 205. The track 205 has an arc shape with ends that are spaced apart from each other. The arc has an angle of up to about 270°.

[0052] Referring to Figure 6, the electrical mounting rail portion 100 include a control module 180 for controlling a voltage across the electrical conductors 140. The control module 180 includes an AC to DC converter for converting the power from mains into a suitable voltage and current for the electrical devices 200’, 200” mounted to the rail. As used herein, a‘control module’ is a computer processor or a collection of computer processors. The control module may be a microprocessor for example.

[0053] The control module 180 includes an intensity module for providing a control signal to one or more luminaires 200’ mounted to the electrical mounting rail portion. The control signal contains a digital address of the luminaire 200’ and a desired intensity of the luminaire 200’. The control signal is a digital addressable lighting intensity (DALI) signal. The intensity module includes an encoder for receiving and encoding the control signal as a voltage across the electrical conductors.

[0054] The luminaire 200’ has a rectifier 202, a control module 204, a memory device (not shown) storing a digital address of the luminaire 200’, and an electric light 206.

[0055] The rectifier 202 is a diode bridge for controlling the direction of current flow through the luminaire 200’. Thereby, the electric terminals 240’ of the luminaire 200’ can be connected to the electrical conductors 140 of irrespective of their polarities. That is, one of the electrical terminals 240’ can be connected to a first electrical conductor 140 having a positive or negative polarity, and the other one of the electrical terminals 240’ can be connected to a second electrical conductor 140 having an opposite polarity to the first electrical conductor 140. Thereby, the user does not need to identify the polarity of the electrical conductors before connecting the electrical device 200’.

[0056] The control module 204 includes a decoder. After rectification by the rectifier 202, the decoder of the control module 204 decodes the control signal from the voltage from the conductor tracks. The control module 240 then determines if the digital address in the control signal corresponds to the stored digital address. If so, the control module adjusts the intensity of the electric light using pulse width modulation.

[0057] Instead (or in addition to using a DALI signal), the control system of the electrical mounting rail portion may control the luminaire intensity using wireless communication. In this embodiment, each of the control module of the electrical mounting rail portion and the control module of the luminaire includes a wireless communication module. When a user desires to adjust the intensity of a luminaire, the user provides an input to the control module of the electrical mounting rail portion, which converts the input to a control signal that is transmitted wirelessly to the luminaire.

[0058] Referring to Figure 7, in an example lighting assembly using the electrical mounting rail portion described above, the electrical mounting rail portion 100 is connected to luminaires 200 and connected to a second electrical mounting rail portion 300. The second electrical mounting rail portion 300 is connected to luminaires 200 and to other electrical mounting rail portions 500, 700 to which other luminaires 200 are connected.

[0059] Figure 8 shows a portable luminaire assembly 900 incorporating the electrical mounting rail portion 100 described above. The portable luminaire assembly 900 is shown as a floor lamp assembly, which is locatable by the user on a ground surface. In other embodiments, the portable luminaire assembly may be a desk or table lamp. In yet further embodiments, the portable luminaire assembly may be a wall-attachable assembly that can be removably secured to a wall surface as desired by the user. The mounting rail portion 100 is mounted to a portable base 920. The portable base 920 includes a low voltage DC supply for supplying power to the mounting rail 100. This embodiment provides the user with flexibility and freedom to locate the mounting rail portion 100 in a space. One or more luminaires 200 can be mounted to the mounting rail at any location along the length of the mounting rail 100. In addition, the luminaire(s) 200 can be mounted at different angular orientations about the mounting rail 100. Thereby, the user is able to customise the overall aesthetic visual impression and/or the lighting effect provided by the portable floor lamp 900. In other embodiments, the portable base may be provided with more than one mounting rail mounted thereto.

[0060] In some embodiments, the luminaire includes an embedded wireless dimming/switching module. A group consisting of a plurality of these luminaires can be mounted to the mounting rail portion of any of the embodiments described previously above and can be wirelessly controlled without requiring any further programming or commissioning. This allows the luminaires to be made and sold separately from the mounting rail portion. Thereby, the user can purchase and install these luminaires as desired providing more freedom to the user to customise the overall visual aesthetic appearance of the assembly and provides more freedom to the user to customise the lighting effect.

[0061] The rail provides increased freedom of installation to the user. The rail can be mounted to the ceiling, wall, floor in an enclosed space, or to a portable base, and luminaires can be mounted at any angular orientation and at any location along the rail depending on the requirements of the user and of the space. Further rails can be mounted to the rail and further luminaires can be connected to those further rails, which increase the degree of installation freedom provided to the user. The rail contributes to the visual aesthetic impression provided by the overall lighting assembly and does not need to be integrated, disguised or concealed in the space.

[0062] While the above description refers to embodiments of an electrical mounting assembly, it will be appreciated that other embodiments can be adopted by way of different combinations of features. Such embodiments fall within the spirit and scope of this invention.