Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
LIGHTING INSTALLATION
Document Type and Number:
WIPO Patent Application WO/2004/016986
Kind Code:
A1
Abstract:
A lighting installation is described which comprises a main housing (10) which can be secured to a ceiling, wall or floor structure, either recessed into an aperture in the structure or mounted to its surface. A lamp housing (30) is releasably engagable within the main housing (10) by means of a latch mechanism (16) of the 'push click fix, push click release' type. A variety of different light bulbs (50) and light transmitting windows (56) can be attached to the lamp holder (30) to provide different lighting effects. These can be assembled prior to installing the lamp housing (30) in the main housing (10). The lighting installation has minimal visual evidence of its method of fixing and provides visual continuity in terms of the structure with interchangeable lighting effects possible by using different lamp housings (30), bulbs (50) and windows (56).

Inventors:
JAMES DOUGLAS (GB)
HEAP DANIEL (GB)
WARREN JONATHAN (GB)
Application Number:
PCT/GB2003/003387
Publication Date:
February 26, 2004
Filing Date:
August 05, 2003
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
MINDS EYE 3D LIGHTING DESIGN L (GB)
DOUGLAS JAMES (GB)
HEAP DANIEL (GB)
WARREN JONATHAN (GB)
International Classes:
F21S8/02; F21S8/04; F21V21/03; F21V21/04; (IPC1-7): F21V21/04; F21S8/02; F21V21/02
Domestic Patent References:
WO2000012840A12000-03-09
Foreign References:
FR2683617A11993-05-14
FR2617946A11989-01-13
EP0396784A11990-11-14
Attorney, Agent or Firm:
Pluckrose, Anthony William (Verulam Gardens 70 Gray's Inn Road, London WC1X 8BT, GB)
Download PDF:
Claims:
CLAIMS : -
1. A lighting installation comprising a housing mountable on or in a ceiling, wall or floor structure, a lamp housing for removably receiving a light bulb, and a latch mechanism, operable to allow the lamp housing to engage within the main housing and to be disengaged therefrom, actuated by the application of pressure to the lamp housing in a single direction.
2. A lighting installation as claimed in claim 1, wherein the main housing comprises a tubular wall, a support for the latch mechanism and mounting means to mount the tubular wall on or in a structure.
3. A lighting installation as claimed in claim 2, wherein the mounting means comprises a flange surrounding the tubular wall for securing against the surface of a structure.
4. A lighting installation as claimed in claim 3, wherein the flange comprises a mesh for receiving plaster to bond the flange against the structure.
5. A lighting installation as claimed in claim 3, further comprising at least one arm hingedly secured to the tubular wall and resiliently biassed towards the flange, so as to enable part of a structure to be gripped between the arm and the flange.
6. A lighting installation as claimed in claim 2, wherein the mounting means comprises a member extending across at least part of one end of the tubular wall having apertures for receiving mechanical fixing means for fixing to a structure.
7. A lighting installation as claimed in any preceding claim, wherein the lamp'housing comprises a tubular wall, a connector for realeasably receiving a lightbulb within the tubular wall and means to engage with the main housing to secure the lamp housing therein.
8. A lighting installation as claimed in claim 7, wherein the means to engage comprises a support spanning one end of the tubular wall and having a aperture for receiving the latch mechanism mounted on the main housing.
9. A lighting installation as claimed in claim 7 or claim 8, further comprising means to releasably retain a light transmitting window across one end of the tubular wall.
10. a lighting installation as claimed in claim 9, wherein the light transmitting window is mounted in a frame having resilient arms formed with apertures and the means to realisable retain the light transmitting window comprises tongues projecting from the tubular wall of the lamp housing engageable in the apertures.
11. A method for assembling and disassembling a lighting installation in accordance with any preceding claim, comprising the steps of: securing the main housing on or in a structure, inserting the lamp housing into the frame, applying pressure on the lamp housing in a direction into the main housing to cause the latch mechanism to engage the lamp housing with the main housing and, when required, applying further pressure against the lamp housing in a direction into the main housing to cause the latch mechanism to disengage the lamp housing from the main housing and withdrawing the lamp housing from the main housing.
12. A lighting installation substantially as hereinbefore described and with reference to the accompanying drawings.
13. A method for assembling and disassembling a lighting installation as substantially as hereinbefore described and with reference to the accompanying drawings.
Description:
LIGHTING INSTALLATION The present invention relates to a lighting installation and a method of assembling and disassembling the installation which leaves minimal visual evidence of the fixing method and provides for an interchangeable luminaire which can produce different lighting effects from a common installation.

It is known to provide a lighting installation having a frame which can be recessed into a wall or ceiling structure, or secured to the front face of a wall or ceiling, with a light fitting inside the frame. However, the frame is dedicated to a specific type of light fitting giving one particular lighting effect. In addition, it is usually necessary to fit the light bulb directly into the body after the latter has been installed, which can be an awkward and time consuming process.

The present invention provides a lighting installation comprising a housing mountable on or in a ceiling, wall or floor structure, a lamp housing for removably receiving a light bulb, and a latch mechanism, operable to allow the lamp housing to engage within the main housing and to be disengaged therefrom, actuated by the application of pressure to the lamp housing in a single direction.

Preferably, the main housing comprises a tubular wall, a support for the latch mechanism and mounting means to mount the tubular wall on or in a structure.

The mounting means may comprise a flange surrounding the tubular wall for securing against the surface of a structure.

In one embodiment, the flange comprises a mesh for receiving plaster to bond the flange against the structure.

In another embodiment, the main housing further comprises at least one arm hingedly secured to the tubular wall and resiliently biassed towards the flange, so as to enable part of a structure to be gripped between the arm and the flange.

In yet another embodiment, the mounting means comprises a member extending across at least part of one end of the tubular wall having apertures for receiving mechanical fixing means for fixing to a structure.

The lamp housing preferably comprises a tubular wall, a connector for releasably receiving a lightbulb within the tubular wall and means to engage with the main housing to secure the lamp housing therein.

The means to engage may comprise a support spanning one end of the tubular wall and having a aperture for receiving the latch mechanism mounted on the main housing.

The lamp housing preferably further comprises means to releasably retain a light transmitting window across one end of the tubular wall.

The light transmitting window may be mounted in a frame having resilient arms formed with apertures and the means to realisable retain the light transmitting window comprises tongues projecting from the tubular wall of the lamp housing engageable in the apertures.

The present invention also provides a method for

assembling and disassembling a lighting installation of the type described, comprising the steps of: securing the main housing on or in a structure, inserting the lamp housing into the frame, applying pressure on the lamp housing in a direction into the main housing to cause the latch mechanism to engage the lamp housing with the main housing and, when required, applying further pressure against the lamp housing in a direction into the main housing to cause the latch mechanism to disengage the lamp housing from the main housing and withdrawing the lamp housing from the main housing.

The present invention will now be described in detail, by way of example only, with reference to the accompanying drawings in which: Figure 1 shows a first embodiment of the main housing of a lighting installation in accordance with the present invention; Figure 2 shows a second embodiment of the main housing ; Figure 3 shows a third embodiment of a main housing; Figure 4 shows a first embodiment of a lamp housing for use in the main housing; Figure 5 shows a window holder for use with the lamp housing of Figure 4; Figure 6 shows stages in the assembly of the lighting installation of the present invention; and Figures 7,8 and 9 show examples of the lighting

installation in use providing different lighting effects.

Figure 1 illustrates the main housing of a lighting installation in accordance with a first embodiment of the present invention. In particular, Figures la, 1b and 1d show front, side and plan views respectively and Figure lc shows a cross-sectional view on the line AA of Figure lb. It will be appreciated that terms such as front, rear, side, top, bottom, upper, lower, horizontal and vertical as used herein are for ease of reference to the Figures and are not limiting to the actual orientation of the various parts of the installation in use.

The main housing 10 comprises a tubular wall 12 which is shown square in cross-section but could be circular or any other desired shape. The tubular wall 12 is open at its upper and lower ends. An arched support 14 spans the upper end, made up of two vertical limbs 14a, joined by a horizontal limb 14b.

A latch mechanism 16, described further below, is mounted on the horizontal limb 14b projecting downwardly.

An outwardly projecting flange 18 extends around the lower end of the tubular wall 12 a short distance above the lowermost edge of the tubular wall 12. As best seen in Figure ld, flange 18 comprises a mesh.

In use, the main housing 10 is recessed into an aperture in a structure which may be a ceiling, wall or even a floor. For ease of reference, in the following description only a ceiling will be referred to but is to be understood that any desired surface could be used. The housing 10 is recessed into the aperture such that the majority of the housing 10

extends above the ceiling but the mesh flange abuts against the lower surface of the ceiling. Plaster can then be applied over the mesh flange 18 to secure the housing 10 in place. When installed, the lower most edge of the tubular wall 12 is flush with the surface of the ceiling.

Figure 2 illustrates schematically the main housing 10 of a lighting installation in accordance with a second embodiment of the present invention. In particular, Figure 2a shows a perspective view and Figure 2b a cross-sectional view in use. The main housing 10 has a similar construction to Figure 1 and accordingly the same reference numerals appear in Figure 2a and 2b where appropriate. However, in this case the relatively wide mesh flange 18 is omitted and replaced by a narrower bezel flange 22. In addition, at least one arm 24 is provided, pivotally attached to the tubular wall 12 and resiliently biassed, for example by a spring, in a direction toward the bezel flange 22. The latch mechanism 16 is omitted from Figures 2a and 2b for simplicity.

In use, the housing 10 can be fitted into an aperture in the ceiling in the same manner as Figure 1 with the bezel flange against the lower surface of the ceiling. The periphery of the aperture in the ceiling is then gripped between the spring biassed arms 24 and the bezel flange 22 to secure the housing 10 in place.

Figure 3 illustrates the main housing 10 for a lighting installation in accordance with a third embodiment of the present invention. In this case, the housing 10 is intended to be mounted directly onto the surface of the ceiling, and not recessed into it.

Figure 3a shows a cross sectional view along the line AA of the plan view of Figure 3b.

The housing 10 consists of a tubular wall 12, which again is shown square in cross-section but may be of any desired shape. A horizontal cross bar 26 spans one open end of the tubular wall 12, recessed a short distance into the tubular wall 12. The cross bar 26 includes a number of apertures 28 allowing the housing 10 to be fixed to a ceiling with mechanical fixing means such as screws etc. The latch mechanism 16 is mounted on the cross bar 26 extending downwardly into the housing 10.

Figure 4 shows a lamp housing 30 which is received into the main housing 10 in use, as described further below. In particular, Figures 4a, 4b and 4d show front, side and plan views respectively and Figure 4c shows a cross-sectional view along the line AA of Figure 4a.

The lamp housing 30 comprises a tubular wall 32 open at its lower end. It is shown square in cross- section but other shapes are possible. It is dimensioned to fit within the main housing 10 and is therefore is usually of the same cross-sectional shape, although this would not be essential. The upper end of the tubular wall 32 is closed by an end wall 34. A bulb connector 36 of known design for receiving a lightbulb 50 is mounted on the end wall 34 projecting downwardly. Typically, the bulb connector 36 will include a conventional bayonet or screw socket for receiving a conventional bulb 50. An arched support 38 extends over the end wall 34, comprising two vertical limbs 38a joined by a horizontal limb 38b. An aperture 40 is formed in the horizontal limb 38b for receiving and engaging with the latch mechanism 16 as described below.

The front and rear faces of the tubular wall 32 have upper and lower apertures 42,44 formed by folding flaps inwardly to create upper and lower tongues 46,48 projecting inwardly of the tubular wall 32.

It may be desired to provide a light transmitting window, typically a sheet of glass, across the open end of the tubular wall 32. For this purpose, a holder 52 for the window is provided as illustrated in Figure 5. Figure 5a shows a front view and Figure 5b a side view of the window holder 52.

The window holder 52 comprises a peripheral wall 54 into which a window 56 can be secured, for example by transparent cement or silicone. The cross sectional shape of the peripheral wall 54 is the same as that of the lamp housing 30. Two arms 58 extend upwardly from opposite sides of the peripheral wall 54. Each arm 58 is formed with one or more apertures 60. The arms 58 have some resilience and can therefore be squeezed together at the top, allowing them to be inserted into the lamp housing 30 and the apertures 60 located over the lower tongues 48 in order to attach the window holder 52 to the lamp housing 30. This attachment may be arranged to allow relative positions of the window holder 52 and lamp housing 30 to be adjusted hence positioning the window at various heights with respect to the bulb.

In use, the lighting installation is assembled as described below, with reference to Figure 6. First, the main housing 10 is secured to the ceiling, either recessed into it for the first and second embodiments or attached to its surface for the third embodiment.

This can be done during the relatively messy"first fix"stage of construction. Alternatively, for the

second and third embodiments, the main housing 10 can be installed later in the"second fix"stage of construction. Further assembly of the lighting installation can take place in the"second fix"stage to avoid damage or the ingress of dirt and dust into the finished luminaire.

The main housing 10 of all the embodiments is a relatively inexpensive product to produce, stock and supply which assists the lighting manufacturer/ distributor/supplier who is able to fulfill orders even for large buildings from an inexpensive stock holding whilest the relevant lamp housings can be ordered to the specific requirements of the building for installation later in the construction process.

This minimises the loss of business due to manufacturing or supply lead times.

If a window 54 is required in the finished luminaire, the window holder 52 is fitted into the lamp holder 30 before the lamp holder 30 is fitted in the main housing 10. Accordingly, this can be done at another location and at a different time, depending on what is convenient. As shown in Figures 6a and 6b, the arms 58 are squeezed together and inserted into the lamp holder 30. The arms 58 can then be released into engagement with the lower tongues 48. In this position, the uppermost edges of the arms 58 abut against the undersides of the upper tongues 48 allowing force on the window holder 52 to be transmitted to the lamp housing 30.

The lamp housing 30 and window holder 52 subassembly can now be inserted into the previously installed main housing 10 as shown in Figure 6c.

Initially, the horizontal limb 38b of the arch 38 of the lamp housing 30 will contact the latch mechanism

16. The latch mechanism 16 is of the"push click fix, push click release"type. That is, pressure applied against the latch once causes it to click into engagement. Further pressure against the latch in the same direction causes it to click into disengagement, with no additional actions or movements necessary to engage or disengage to the latch.

Thus, upward pressure on the lamp housing 30 and window holder 52 subassembly as indicated by the arrow in Figure 6c causes the latch mechanism 16 to engage and retain the subassembly within the housing 10.

To disassemble the installation, pressure on the subassembly in the same upward direction will cause the latch mechanism to release and allow the subassembly to be withdrawn from the main housing 10.

Electrical power may be provided to the lightbulb 50 in any convenient manner. For example, when the main housing 10 is installed, a trailing wire (not shown) connected to the mains supply may be provided, with an end connector. The wire may be pulled down out of the main housing 10 and connected into a mating connector 62 on the lamp housing 30 to which the bulb connector is wired, just before the lamp housing 30 and window holder 52 subassembly are inserted and latched into the main housing 10. Alternatively, the bulb connector 36 and the latch mechanism 16 may be configured to physically engage with one another to allow for transmission of power therethrough to the bulb 50.

In this way, the fitting of an appropriate bulb 50 and window 56 to give a desired lighting performance can be dealt with before the subassembly is attached to the main housing 10, which is more

convenient and efficient. A variety of luminaires can be provided by altering the type of bulb, window and even the shape and reflectivity of the lamp housing 30, provided the basic dimensions of the lamp housing 30 are suitable for insertion in the main housing 10.

This means that visual continuity, in terms of the basic structure of the luminaire, can be provided throughout a building but with different luminaires giving different lighting effects in different areas.

As the usage of the building changes over its life, different types of lamp housings with various bulbs and windows can be interchanged in various main housings 10 to give the desired lighting performance.

Examples of the different lighting effects which can be achieved with the present invention are illustrated in Figures 7 to 9. Figure 7 shows the first embodiment, with the plaster-in mesh-flange housing 10. Figure 7a shows a narrow downlight effect and Figure 7b shows a wider angled downlight effect produced by use of an etched glass window. Similarly, Figures 8a and 8b, and 9a and 9b, show the same effects achieved with the second and third embodiments of the invention. Figure 9c shows a wall wash effect produced by a specially shaped lamp housing which directed light from a ceiling mounted installation towards a wall.

It will be appreciated that the present invention provides a versatile lighting installation which is simple and efficient to install and to maintain, and which is able to provide a variety of different lighting effects from a common structure. It will be realised at that number of variations and modifications to the precise details described may be made without departing from the scope of the present invention as set out in the claims.