GB2149079A

GB2149079A - A lighting fitting

Info

Publication number: GB2149079A
Application number: GB08426580A
Authority: GB
Inventors: Bryan Robert Avery
Original assignee: Individual
Current assignee: Individual
Priority date: 1983-10-28
Filing date: 1984-10-19
Publication date: 1985-06-05
Also published as: GB8426580D0; GB2149079B; GB8328869D0

Abstract

A lighting fitting (2) comprising mounting means (4) for mounting the lighting fitting (2) to a ceiling (6), and holder means (8) for holding a light source (10), the holder means (8) having an upwardly directed aperture for receiving the light source (10) whereby the light source (10) is constrained in use of the lighting fitting (2) to shine light upwardly towards the ceiling (6). <IMAGE>

Description

SPECIFICATION A lighting fitting This invention relates to a lighting fitting.

In domestic, office and industrial premises there is often a need for lighting that gives illumination without being accompanied by glare. For example, lighting that gives a glare can give an annoying reflection from television screens or visuai display unit screens.

It is an aim of the present invention to provide a lighting fitting that is able to provide illumination without the glare.

Accordingly, this invention provides a lighting fitting comprising mounting means for mounting the lighting fitting to a ceiling, and holder means for holding a light source, the holder means having an upwardly directed aperture for receiving the light source whereby the light source is constrained in use of the lighting fitting to shine light upwardly towards the ceiling.

The lighting fitting of the invention is able to provide good background lighting without the glare normally associated with such levels of lighting because the light shines upwardly towards the ceiling. The mounting of the lighting fitting to the ceiling is also advantageous in that wires for the lighting fitting can often easily and unobtrusively be brought to the lighting fitting inside the ceiling, especially where false ceilings are employed. Furthermore, with some air conditioning arrangements that are installed in ceilings, the ducting that is used can remove heat from the lighting fittings quite simply because the lighting fittings can be arranged to be in the vicinity of the air duct inlets. The removed heat can then be recycled if desired.

The mounting means may comprise at least one elongate member adapted in use of the lighting fitting to extend between the ceiling and the holder means.

The mounting means may comprise a plurality of the elongate members.

Each elongate member may be a rod. The rod may be solid or hollow. If hollow rods are employed, they can be manufactured to be very slim, for example so that only one electrical supply wire can be passed through each rod.

If desired, the mounting means may include a cable, chain or cord which will hang from the ceiling and the holder means will hang from the cable, chain or cord.

The aperture of the holder means may be provided with a bayonet or a screw-in connector portion for receiving a complementary part of the light source.

The lighting fitting may be made from various materials. Thus, for example, the mounting means may be made from a metal or a plastics material. Usually, the holder means will be made at least partially from a plastics material to provide insulation properties for insulating the light source.

The lighting fitting may include obstructor means which is positioned around the aperture of the holder means and which obstructs the view of the light source in use of the lighting fitting.

The obstructor means may be made from a metal or a plastics material. It can be arranged to be reflective so that it will assist in reflecting light upwardly.

The lighting fitting may include reflector means for reflecting downwardly the upwardly shining light from the light source in use of the lighting fitting.

The reflector means may be any geometrical shape in plan, such for example as circular, square, rectangular, triangular or hexato- nal.

The reflector means may have a plain or a stepped reflecting surface.

The reflector means may be concave or convex.

The reflector means may be made of mirror finished glass or polished aluminium. Other materials may of course be employed.

if desired, the reflector means may be a Fresnel type reflector means, which gives a wide angle of reflection.

With a mounting means in the form of a cable, chain or cord, the holder means and the reflector means may be arranged to hang on the end of the cable, chain or cord.

The lighting fitting of the present invention may include the light source.

The light source may be a bulb. The bulb can have a filament and it can be a half silvered bulb.

Alternatively, the light source may be a tube such for example as a fluorescent tube.

Embodiments of the invention will now be described solely by way of example and with reference to the accompanying drawings in which: Figure 1 is a perspective view of first lighting fittings; Figure 2 is an end view of the lighting fittings shown in Figure 1: Figure 3 is a perspective view of second lighting fittings; Figure 4 is an end view, partially in section, of one of the lighting fittings shown in Figure 3; Figures 5 and 6 are different perspective views of a third and fourth lighting fittings; Figure 7 is an end view, partially in section, of the lighting fitting shown in Figure 6; Figure 8 is a perspective view of a fifth lighting fitting; Figure 9 is a perspective view of a sixth lighting fitting; Figures 10 and 11 show seventh lighting fittings; Figures 1 2-1 5 show eighth lighting fittings; and Figure 16 shows a section through a ninth lighting fitting.

Referring to Figures 1 and 2, there are shown a plurality of lighting fittings 2. Each lighting fitting 2 comprises mounting means in the form of hollow rods 4 which are connected at one end to a ceiling 6 and at the other end to holder means 8. The holder means 8 is provided with a light source in the form of a bulb 10. The connection of the rods 4 to the holder means 8 can be by means of pivotal connections 1 2 so that the angle of inclination of the rods 4 to the vertical can be varied as desired to vary the height of the bulb 10 from the ceiling 6.

The holder means 8 is further provided with obstructor means 14 and it will be seen that each obstructor means 14 is so positioned that it obstructs the view of the light source 10 in use of the light fitting 2 when the light fitting 2 is suspended on the ceiling 6 and is viewed from below.

The lighting fittings 2 as shown in Figure 1 are arranged in two rows. Each row of lighting fittings 2 is provided with a rectangular reflector means in the form of a reflector sheet 1 6.

As shown in Figure 2, the reflector sheets are of stepped or corrugated cross section. The reflector sheets 1 6 may be made of poiished aluminium. They may be provided with slots by means of which heat generated by the bulbs 10 can be extracted through the reflector sheets 6 and recovered as may be necessary.

The lighting fittings illustrated in Figures 1 and 2 are particularly suitable for foyers, office areas and restaurants.

Referring now to Figures 3 and 4, similar parts as in Figures 1 and 2 have been given the same reference numeral and their precise construction and operation will not again be given. As can be seen from Figures 3 and 4, the ceiling 6 is a suspended ceiling having panels 1 8 and support members 20. Figure 4 shows that the reflector means 1 6 is more sharply stepped than in Figure 2 and it may be a Fresnel type system. The reflector means 1 6 is circular as shown in Figure 3 and it is connected to an air extract duct 22. The duct 22 may form part of an air conditioning system and the duct 22 may be arranged to extract and recover heat from the bulb 10 for subsequent recirculation.

Figure 4 shows that the holder means 8 may optionally be provide with hollow rods or conduits 24 providing the facility of optional power connection to the next adjacent lighting fitting 2.

Figure 4 also illustrates clearly how the rods 4 can be pivotally connected by connections 12 at their upper ends to the ceiling 6 and at their lower ends to the holder means 8.

Referring now to Figures 5,6 and 7, there are shown two further and similar types of lighting fittings in which similar parts as in Figures 1 and 2 have been given the same reference numeral for ease of description. In Figures 5,6 and 7 the mounting means comprises the hollow rods 4 together with a chain, cord or cable 26. It will be seen that the chain, cord or cable 26 has the remainder of the lighting fitting 2 suspended from it.

Referring now to Figure 8, similar parts as in previous Figures have again been given similar reference numeral for either description. In Figure 8, the rods 4 are connected directly to the ceiling 6.

Figures 9, 10 and 11 show two further alternative types of lighting fittings. Similar parts as in previous Figures have been given the same reference number for ease of description. In Figure 9, it will be seen that a simple lighting fitting 2 is employed which uses the ceiling as a reflector. In Figures 10 and 11, it will be seen that five rows of five lighting fittings 2 are provided. It will also be seen that the reflectors 1 6 can be concave or convex as can be seen most clearly in Figure 11.

In Figures 1 2-1 5, the holder means 8 holds a light source in the form of a fluorescent tube 10. The obstructor means 1 4 is an elongate channel device 14 which is positioned underneath each tube 10 so that the tube 10 cannot be seen from below. The rectangular reflector means 16 may be adjustable bladed louvre reflectors 16. Figure 1 3 shows the louvre reflectors 1 6 in a closed position, Figure 14 shows the louvre reflectors 1 6 in a semi-open position, and Figure 1 5 shows the louvre reflectors 1 6 in a fully open position. By varying the position of the louvre reflectors, the amount of reflected light may be controlled in a similar way to a dimmer switch.

In Figure 16, the lighting fitting 2 is similar to that of Figures 12-1 5 except that the reflector means 1 6 is a fixed convex reflector means 16 which gives maximum light dispersion.

It is to be appreciated that the embodiments of the invention described above with reference to the accompanying drawings have been given by way of example only and that modifications may be effected. Thus, for example, different types of mounting means 4 and different types of holder means 8 may be employed. Also, the light sources can be variously coloured as may be required. Simi larly, the lighting fittings may be employed in various locations so that, for example, the lighting fittings illustrated in Figures 3 and 4 may be most suitable for relatively small office areas, the lighting fittings illustrated in Figures 5 to 9 may be most suitable for domestic and small commercial applications, and the light ing fittings illustrated in Figures 10 to 16 may be most suitable in reception areas, foyers, display areas and show rooms. The reflector means may offer varying degrees of reflectiv ity by being formed of replaceable panels having different reflective properties. The reflector means may also be arranged to di rect, diffuse or concentrate the light as required. A further advantage of a mirrored reflector is that the image of the light source is formed behind the plane of the mirror which from normal angles of view may make the light source invisible whilst still reflecting light downwards. Such an arrangement may have advantages where a glare-free light source is important, for example in offices and factories.

Claims

1. A lighting fitting comprising mounting means for mounting the lighting fitting to a ceiling, and holder means for holding a light source, the holder means having an upwardly directed aperture for receiving the light source whereby the light source is constrained in use of the lighting fitting to shine right upwardly towards the ceiling.

2. A lighting fitting according to claim 1 in which the mounting means comprises at least one elongate member adapted in use of the lighting fitting to extend between the ceiling and the holder means.

3. A lighting fitting according to claim 2 in which the mounting means comprises a plurality of the elongate members.

4. A lighting fitting according to claim 2 or claim 3 in which each elongate member is a rod.

5. A lightinq fitting according to claim 4 in which the rod is solid or hollow.

6. A lighting fitting according to claim 1 in which the mounting means includes a cable, chain or cord which will hang in use from the ceiling so that the holder means will then hang from the cable, chain or cord in use.

7. A lighting fitting according to any one of the preceding claims in which the aperture of the holder means is provided with a bayonet or a screw-in connector portion for receiving a complementary part of the light source.

8. A light fitting according to any one of the preceding claims and including obstructor means which is positioned around the aperture of the holder means and which obstructs the view of the light source in use of the lighting fitting.

9. A lighting fitting according to claim 8 in which the obstructor means is arranged to be reflective so that it will assist in reflecting light upwardly.

10. A lighting fittinq according to any one of the preceding claims and including reflector means for reflecting downwardly the upwardly shining light from the light source in use of the lighting fitting.

11. A lighting fitting accordinq to claim 10 in which the reflector means has a plain or a stepped reflecting surface.

12. A lighting fitting according to claim 10 or claim 11 in which the reflector means is concave or convex.

1 3. A lighting fitting according to claim 10 or claim 11 in which the reflector means is a Fresnel type reflector means.

14. A lighting fitting according to any one of the preceding claims and including a light source.

15. A lighting fitting according to claim 14 in which the light source is a bulb or a tube.

1 6. A lighting fitting substantially as herein described with reference to the accompanying drawings.