GB2311125A

GB2311125A - Ceiling light fitting with flexible fabric canopy

Info

Publication number: GB2311125A
Application number: GB9704846A
Authority: GB
Inventors: Daniel Kohler
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-03-14
Filing date: 1997-03-08
Publication date: 1997-09-17
Anticipated expiration: 2017-03-08
Also published as: GB9704846D0; DE29604725U1; NL1005527A1; FR2746170B3; GB2311125B; FR2746170A1; NL1005527C2

Abstract

An elongate ceiling light fitting, preferably for bare ceilings, more especially concrete ceilings, characterised in that the light fitting is provided with transversely extending, substantially horizontal bars (15) in the region of its ends above the lamp (10) or respectively its reflectors (12), said bars being resistant to bending, protruding laterally beyond the main body of the light and being connected by means of a flexible, film- or fabric-like web (17) or sheet, which is kept tensioned. The presence of the fabric like web or sheet results in improved acoustics within the associated room.

Description

CEILING LIGHT FITTING The invention relates to an elongate ceiling light fitting preferably for bare ceilings, more especially concrete ceilings.

Such light fittings are generally provided with one or more fluorescent tubes, as well as a reflector and a diffuser or an anti-dazzle cover, but the invention is not restricted to one specific configuration for the light fittings; rather, modifications are possible, e.g. in respect of the electronic additional component parts, the power supply and the like.

The basic object of the invention is to provide an abovementioned light fitting so that an advantageous acoustic behaviour can be achieved in the associated rooms, as well as good illumination. Air-conditioning advantages are also to be achieved when mounting the light fitting beneath bare ceilings.

To achieve this object according to the invention, the elongate ceiling light fitting is provided with transversely extending bars, which are resistant to bending, in the region of its ends above the lamps, said bars being interconnected by means of a flexible, film- or fabric-like web, which is kept tensioned therebetween. In such case, a support is advantageously provided, which is used for the securement of the light fitting and the bars.

In this case, the support is provided with securing means for mounting the support on the ceiling and - if necessary with tensioning means, whereby a certain tensile stress is introduced into the abovementioned web via the bars.

The bars are preferably disposed halfway along the support, or respectively symmetrically relative to the light fitting. Moreover, a bar length is preferably selected which substantially corresponds to the length of the light fitting, so that there are no evenly rectangular webs, but there are web configurations which are substantially square, but are at least so shaped that the width of the webs is at least substantially 0.6-times the length of the light fitting.

The invention will be described further, by way of example, with reference to the accompanying drawings, in which Fig. 1 is a schematic perspective view of a ceiling light fitting from below; Fig. 2 is a side elevational view of the light fitting of Fig. 1; Fig. 3 is a cross-sectional view though the light fitting of Fig. 1; Fig. 4 is an enlarged, partial cross-sectional view through the light fitting of Fig. 1; Fig. 5 is an enlarged side elevational view of the light fitting of Fig. 1, that it is say an end portion; and Figs. 6 and 7 are each schematic views of different supports for the light fittings according to the invention.

The dwelling or office area to be illuminated has a bare1 untreated (that is to say not further covered) concrete ceiling 1, which is used as the basis for the suspension of the light fittings. Such suspension is effected by means of a support formed from two rigid plates 2 and 3, which are evenly rectangular when viewed from the side, said plates preferably being formed from metal and having an evenly rectangular recess 4, so as to achieve, in practice, a circulatory strip of a substantiOlly uniform width. The longer portions of the strip are referenced 5 and 6, and the shorter portions are referenced 7 and 8.

These plates 2 and 3 are kept apart by means of spacer members, which are not shown more fully, so as to achieve a rigid structure. The suspension from the concrete ceiling 1 may be effected in any desirable manner such as is indicated referenced 9.

The actual light is disposed between the lower portions of larger portions 5 and 6 and substantially comprises a fluorescent tube 10 having a length of between 1 m and 1.5 m and, for example, a reflector 11 and an anti-dazzle cover 12. The power supply is referenced 13.

Chokes and the like operational components are referenced 14, and these additional arrangements are mounted between the upper portions 5.

At the ends of the light fitting or respectively the portions 5, rigid bars 15 are secured closely beneath these portions, said bars extending transversely and being provided on the sides facing each other with an undercut groove, into which the thickened end 16 of a web 17 is inserted. This web 17 is kept taut between the two bars 15 with slight tensile stress and forms, to some extent, a fin above the actual light. It comprises a thin-walled, flexible, film- or fabric-like structure which, therefore, extends in practice over the length of the light and is slightly narrower than the longitudinal extension of the light fitting. Furthermore, the bars 15 are secured centrally on the support. In consequence, web portions of identical width are situated on both sides of the portions 5 and 6.

The abovementioned securement of the web edges in the bars 15 permits the web 17 to be replaced.

In order to ensure that the web 17 is kept taut, the bars 15 are mounted in a particular manner. They are secured or influenced by a lever 19, which is subject to the action of a compression spring 18 and is pivotable about a transverse axle 20, said lever always striving to draw the bars 15 outwardly, or respectively to keep the web 17 tensioned. In such case, levers 19 are preferably mounted at each end 2 of the light fitting so as to permit a better securement of the bars 15 to be achieved.

If the lever 19 is extended upwardly beyond the transverse axis 20, the extensions of the levers 19, situated at each end of the light fitting, can be connected via a tie-rod or the like, not shown, in the manner of a spring tension so as to permit a tensile stress to be likewise introduced into the web 17.

In the embodiments of Figs. 6 and 7, a support is provided which has no upper portions 5. Appropriately configured, parallel metal plates 20 may be used, which are U-shaped when viewed from the side, but portions 6 and 7 may also be used, which are connected by means of transverse portions 21. In such case, the securement of the bars 15 would be able to be effected in the region of the free ends of the portions 7.

It should be mentioned that the web 17 must be resistant to tension and should have sound-absorbing properties; it is preferably manufactured on the basis of technical textiles; a carrier fabric may be provided, which is coated with a non-woven material. A spacer member may also be used, which may be coated on its upper and lower sides, these layers also being able to be welded at the edges.

Claims

CLAIMS 1. An elongate ceiling light fitting, preferably for bare ceilings, more especially concrete ceilings, characterised in that the light fitting is provided with transversely extending, substantially horizontal bars (15) in the region of its ends above the lamp (10) or respectively its reflectors (12), said bars being resistant to bending, protruding laterally beyond the main body of the light and being connected by means of a flexible, filmor fabric-like web (17) or sheet, which is kept tensioned.
2. A light fitting as claimed in claim 1, wherein a support is provided, which serves to reinforce the ceiling and to secure the web (17) and the bars (15).
3. A light fitting as claimed in claims 1 and 2, wherein the support comprises two substantially vertical plates (2,3), which lie parallel to each other and are kept at a fixed spacing from each other, said plates accommodating the actual light (10,11,12) therebetween at their lower ends.
4. A light fitting as claimed in claim 2, wherein a preferably spring-loaded arrangement (18,19) is mounted on the support and acts on the bars (15) to keep the web (17) taut or serves to secure the bars (15).
5. A light fitting as claimed in claim 4, wherein levers (19) are provided, which are pivotable about a transverse axis (20) and are subject to the influence of a spring, the bars (15) being secured to said levers.
6. A light fitting as claimed in claim 5, wherein two levers (19) are mounted as a pair at each end of the light.
7. A light fitting as claimed in claim 5, wherein a lever (19), which is situated at one end of the light, is connected to a lever, which is situated at the other end of the light, via a spring tension.
8. A light fitting as claimed in claim 3, wherein the plates (2,3) are evenly rectangular when viewed from the side and are provided with an evenly rectangular recess (4) so as to form a circulatory strip.
9. A light fitting as claimed in claim 3, wherein the plates (2,3) have a U-shaped configuration when viewed from the side, the bars (15) being mounted on the upwardly orientated, shorter portions (7) of the U-shape (Fig. 7).
10. A light fitting as claimed in claim 9, wherein the portions (6,7) , which form the U-shape, are connected in part by transversely extending portions (21).
11. A light fitting as claimed in claim 1, characterised in that the web (17) is substantially inextensible and designed to be sound-absorbing.
12. A light fitting as claimed in claim 11, wherein a substantially inextensible carrier layer is provided, to which a non-woven material or felt is connected.
13. A light fitting as claimed in claim 11, wherein a spacer member is provided, which is coated on its upper and lower sides, the coatings being able to be welded at their edges.
14. A light fitting substantially as hereinbefore described with reference to the accompanying drawings.