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Title:
A LIGHT FOR A CALL POINT
Document Type and Number:
WIPO Patent Application WO/2021/250125
Kind Code:
A1
Abstract:
Aspects of the present invention relate to a light for a call point. The light comprises a housing having a light source and a bracket comprising a supporting flange for securing the housing to the bracket. The light source is positioned distally of a distal end of the supporting flange such that the light source illuminates the front surface of the call point.

Inventors:
FITZGIBBON PATRICK (IE)
Application Number:
PCT/EP2021/065524
Publication Date:
December 16, 2021
Filing Date:
June 09, 2021
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
ALBA INNOVATIONS LTD (IE)
International Classes:
G08B25/12
Foreign References:
CN103218898A2013-07-24
GB2563423A2018-12-19
EP3348754A12018-07-18
EP1203361A12002-05-08
Attorney, Agent or Firm:
CUMMINGS, Sean et al. (IE)
Download PDF:
Claims:
CLAIMS

1. A light for a call point, the light comprising: a housing having a light source; and a bracket comprising a supporting flange for securing the housing to the bracket; wherein the light source is positioned distally of a distal end of the supporting flange.

2. A light as claimed in Claim 1, wherein the bracket comprises a pair of substantially vertical side arms.

3. A light as claimed in Claim 2, wherein the bracket further comprises an upper horizontal arm and a lower horizontal arm and wherein an aperture is defined within the vertical side arms and the lower and upper horizontal arms.

4. A light as claimed in Claim 3, wherein the lower horizontal arm comprises a gap such that the lower horizontal is formed from a pair of arms.

5. A light as claimed in Claim 4, wherein the pair of arms are coupled by a clip, the clip being moveable between a secured position in which the gap between the pair of arms is closed such that the pair of arms are secured relative to each other and an open position in which the gap between the pair of arms is open.

6. A light as claimed in any one of Claims 2 to 5, wherein each of the pair of side arms comprise a tab for securing the bracket to the call point.

7. A light as claimed in Claim 6, wherein each tab is aligned along a plane of the bracket and wherein each tab extends inwardly towards the opposing vertical side arm along said plane.

8. A light as claimed in Claim 7, wherein each tab is moveable from a first position in which each tab extends substantially along the plane of the bracket to a second position in which each tab extends at least partially out of said plane in a distal direction.

9. A light as claimed in Claim 6 or 7, wherein each tab comprises an aperture or a jaw. 10. A light as claimed in any one of Claims 6 to 9, wherein each tab comprises a frangible portion to allow each tab to be snapped off the corresponding vertical side arm.

11. A light as claimed in any preceding claim, wherein the supporting flange extends substantially perpendicularly from the bracket.

12. A light as claimed in any preceding claim, wherein the housing comprises an aperture for conveying light from the light source and wherein the aperture is positioned distally of the distal end of the supporting flange.

13. A light as claimed in Claim 12, wherein the housing comprises a lens and wherein the lens is aligned with the aperture such that light emitted from the light source passes through the lens prior to passing through the aperture. 14. A light as claimed in Claim 13, wherein the lens is at least partially received within the aperture.

15. A light as claimed in Claim 13 or 14, wherein the lens is configured to refract light from the light source in a proximal direction relative to the housing.

16. A light as claimed in any preceding claim, wherein the supporting flange comprises one or more retention formations extending laterally on the supporting flange for engaging a lower surface of the housing.

17. A light as claimed in any preceding claim, wherein the supporting flange comprises a pair of runners extending longitudinally on the supporting flange for inhibiting rotational movement of the housing. 18. A light as claimed in any preceding claim, wherein the housing comprises a retention slot for receiving a fastener to secure the housing to the flange.

19. A light as claimed in any preceding claim, further comprising a cover pivotally coupled to the housing.

20. A call point comprising a light as claimed in any preceding claim.

21. A call point as claimed in Claim 20, wherein the call point comprises a front panel and a rear panel and wherein the bracket is positioned between the front panel and the rear panel.

22. A call point as claimed in Claim 21 , wherein the supporting flange extends over a top surface of the front panel such that the distal edge of the supporting flange is positioned distally of the front panel.

23. A call point as claimed in any one of Claims 20 to 22, wherein the call point comprises a frangible element, wherein the frangible element is configured to be pressed or broken in order to activate an alarm. 24. A call point as claimed in any one of Claims 20 to 22, wherein the call point comprises a lever or a handle, wherein the lever or handle is configured to be manipulated by a user in order to activate an alarm.

25. A method of fitting a light to a call point, the method comprising: positioning a bracket between a front panel and a rear panel of the call point; and securing a housing having a light source to the bracket; wherein securing the housing to the bracket comprises moving the housing relative to the bracket such that the light source is positioned distally of a front surface of the front panel of the call point.

26. A method as claimed in Claim 25, wherein positioning the bracket between the front panel and the rear panel of the call point comprises locating one or more wires within an aperture on the bracket. 27. A method as claimed in Claim 26, wherein locating the one or more wires within the aperture comprises passing the one or more wires through a gap in an arm of the bracket.

28. A method as claimed in Claim 27, wherein locating the one or more wires within the aperture comprises closing the gap after the one or more wires are located within the aperture.

29. A method as claimed in Claim 28, wherein closing the gap comprises fastening a clip to close the gap.

30. A method as claimed in any one of Claims 25 to 29, wherein positioning the bracket comprises clamping the bracket between the front panel and the rear panel to secure the bracket relative to the call point.

Description:
A LIGHT FOR A CALL POINT

TECHNICAL FIELD The present disclosure relates to a light for a call point. In particular, but not exclusively, the present invention relates to a safety light for illuminating the front surface of a call point. Aspects of the invention relate to a light for a call point, to a call point comprising a light and to a method of fitting a light to a call point. BACKGROUND

Manual fire alarm call points are used to allow people within a building to raise the alarm if they discover a fire. As such, manual call points need to be prominently sited and easily accessed by a person in the event of a fire. Manual call points are distributed throughout buildings such that it is impossible to leave the building without passing a manual call point. Manual call points are typically located near exits from buildings or storeys within a building or on a thoroughfare within the building such that they are readily accessible in the event of a fire. Manual fire alarm call points are generally red in colour such that they are instantly recognisable as being a manual call point so that in an emergency situation a person within the building can quickly identify the nearest call point and raise the alarm.

In order to help improve the recognition of manual fire alarm call points there has been a move within the industry to introduce regulations around the illumination of call points such that, even in the event of a power cut, the manual call points are clearly illuminated and easily identifiable to a person within the building. To meet the relevant safety standards emergency lights are often fitted on the ceiling in the vicinity of a manual fire alarm call point such that the emergency lighting can illuminate the call point in the case of an emergency. However, this solution is unsatisfactory as the illumination provided by the emergency lighting is often not sufficient to meet the safety requirements set within the standards. There is therefore a need to provide a solution to illuminate manual fire alarm call points to help make them instantly recognisable and identifiable to a person within the building in an emergency situation.

It is an aim of the present invention to address one or more of the disadvantages associated with the prior art.

SUMMARY OF THE INVENTION

According to an aspect of the present invention there is provided a light for a call point, the light comprising: a housing having a light source; and a bracket comprising a supporting flange for securing the housing to the bracket; wherein the light source is positioned distally of a distal end of the supporting flange.

The light may be a safety light or an emergency light for illuminating the front surface of a call point. Advantageously the safety light may be retrofitted to existing call points such that the light source within the housing may illuminate the front panel of the call point. Positioning the light source distally of the distal end of the supporting flange allows the light source to be positioned distally of the front surface of the call point thereby promoting uniform illumination across the front surface.

In an embodiment the bracket may comprise a pair of substantially vertical side arms. The pair of side arms may be spaced apart such that the outer edges of the side arms sit flush with the outer surface of the call point when the light is fitted to a call point. The bracket may further comprise an upper horizontal arm and a lower horizontal arm. An aperture may be defined between the vertical side arms and the lower and upper horizontal arms. The aperture beneficially may accommodate wiring that extends from the front surface of the call point to the rear panel of the call point. The aperture may receive the wiring thereby minimising the requirement to rewire the call point when fitting the light. Furthermore, the aperture may allow wiring to be routed from the call point to power the light source of the light.

In an embodiment the lower horizontal arm may comprise a break or gap such that the lower horizontal is formed from a pair of arms. The break beneficially allows the wiring of the call point to be accommodated within the aperture without the need to rewire the call point when attaching the light. This in turn allows the light to be fitted to the call point quickly and easily. The pair of arms may be selectively coupled by a clip. The clip may be moveable between a secured position in which the pair of arms are secured to form the lower horizontal arm and an open position in which the break or gap is defined between the two arms. The clip may be secured to the bracket by a tether, cord, or a plastics fastener. This is beneficial as the clip is secured to the bracket when in the open position thereby preventing the clip being lost and further reducing the number of parts in the emergency light. When secured the clip beneficially prevents the pair of side arms from splaying outwardly.

In another embodiment each of the pair of side arms may comprise a tab for securing the bracket to the call point. Each tab may be aligned along a plane of the bracket and each tab may extend inwardly towards the opposing vertical side arm along said plane. Each tab may be moveable from a first position in which each tab extends substantially along the plane of the bracket to a second position in which each tab extends at least partially out of said plane in a distal direction.

Each tab may comprise a fastening formation such as an aperture or a pair of jaws. The fastening formations on the tabs may be positioned to align with apertures on the front and rear panels of the call point such that the bracket can be secured to the call point using fixings already in place on the call point.

The fastening formations may be mounted on a deformable frame that is moveable from a first position in which the fastening formations are configured to align with corresponding features on the call point and a second position in which the fastening formation is not aligned with the corresponding feature. This is beneficial, for example, where the corresponding features on the call point are raised or protrude thus moving the fastening formations to the second position moves the fastening formations on the tabs out of the way thereby allowing the bracket to sit flushly between the front and rear panels of the call point. The fastening formations may be apertures or pairs of jaws located on each tab. In an embodiment each tab may comprise a frangible portion. The frangible portion beneficially allows each tab to be snapped off the corresponding vertical side arm when the tabs are not required. For example, where the bracket is to be retained between the front and rear panels of the call point by a compressive force such that the bracket is sandwiched between the front and rear panels.

In one embodiment each tab may be aligned along a plane of the bracket. Each tab may extend inwardly towards the opposing vertical side arm. This is beneficial as the tabs may be hidden from view when the bracket is secured to the call point.

In another embodiment the supporting flange may extend substantially perpendicularly from the bracket. This is beneficial as the supporting flange may extend over the top surface of the front panel of the call point.

In one embodiment the housing may comprise an aperture for conveying light from the light source towards the front surface of the call point, in use. The aperture may be positioned distally of the distal end of the supporting flange. The aperture may extend laterally across the housing. The aperture may be positioned within a proximal portion of the housing. The housing may comprise a lens and the lens may be aligned with the aperture such that light emitted from the light source passes through the lens prior to passing through the aperture. The lens may be configured to refract light from the light source in a proximal direction towards the bracket. This is beneficial as it increases the light incident on the front surface of the call point when the light is fitted to the call point.

In another embodiment the lens may be at least partially received within the aperture. This is beneficial as the aperture may be used to locate the lens within the housing. Furthermore, locating a portion of the lens within the housing such that a portion of the lens protrudes beneath the housing improves the light distribution in the upper regions of the front surface of the call point as the housing does not block the light path from the lens to the front surface of the call point.

In one embodiment a pair of tabs on the internal of the housing, for example on an inner surface of the upper housing, may abut the lens so as to inhibit movement of the lens. This is beneficial as the housing may be used to inhibit movement of the lens or secure the lens in position thereby improving the ease of assembly of the housing and further reducing the number of parts within the housing.

In an embodiment the supporting flange may comprise one or more retention formations for engaging a lower surface of the housing. The retention formations may be a series of grooves, ridges or protrusions extending laterally across the top surface of the supporting flange. The retention formations beneficially inhibit rotational movement of the housing thereby maintaining the housing substantially square relative to the bracket. The supporting flange may further comprise a pair of runners extending longitudinally over the top surface of the supporting flange for inhibiting rotational movement of the housing. The runners may receive corresponding formations on the housing such that the housing engages the runners.

The housing may comprise a retention slot for receiving a fastener to secure the housing to the flange. The retention slot allows the housing to be moved in a fore-aft direction relative to the bracket such that the housing may be moved proximally or distally relative to the bracket. In an embodiment the supporting flange may comprise one or more apertures for receiving a screw to secure the housing to the bracket. The apertures may be positioned at different positions in a distal direction on the supporting flange to allow the position of the housing to be selected in dependence on the size or depth of the front panel of the call point. In this sense, positioning the housing is a two-stage process in which the appropriate aperture on the supporting flange is selected and the position of the housing is subsequently adjusted through the retention slot. This beneficially allows the overhang of the housing and thus light source to be adjusted to maximise distribution of light across the front surface of the call point for call points of varying dimensions.

In an embodiment the light may comprise a cover hingedly coupled to the housing. The cover provides two main benefits. Firstly, the cover prevents the call point being activated by a user accidently. Furthermore, the cover reflects incident light from the light source off its inner surface back towards the front surface of the call point. This beneficially increases the illumination of the front surface of the call point.

According to a further aspect of the present invention there is provided a call point comprising a safety light as described in any one of the aforementioned paragraphs. In an embodiment the call point may comprise a front panel and a rear panel and the bracket may be positioned between the front panel and the rear panel. In another embodiment the supporting flange may extend over a top surface of the front panel such that the distal edge of the supporting flange is positioned distally of the front panel.

The rear panel may be a standard call point rear panel mounted on the wall or a single gang back box encased within the wall. As such, the call point may be, for example, a fire alarm call point, a door release switch or any other switch, alarm or plug used with a single gang back box.

In an embodiment the call point may comprise a frangible element which is configured to be pressed or broken in order to activate an alarm.

In an alternative example embodiment the call point may comprise a lever or a handle which is configured to be manipulated by a user in order to activate an alarm.

According to a yet further aspect of the present invention there is provided a method of fitting a light to a call point, the method comprising: positioning a bracket between a front panel and a rear panel of the call point; and securing a housing having a light source to the bracket; wherein securing the housing to the bracket comprises moving the housing relative to the bracket such that the light source is positioned distally of a front surface of the call point.

The method beneficially allows the position of the light source to be adjusted depending on the dimensions of the call point the light is being fitted to. The housing may be moved in a fore-aft direction relative to the call point. The method may comprise loosely securing the housing to the bracket such that the housing may be moved in a fore-aft direction before fixing the housing relative to the bracket.

In an embodiment positioning the bracket behind the front panel or between the front panel and the rear panel of the call point may comprise locating one or more wires within an aperture on the bracket. Accommodating the wires within an aperture beneficially allows the bracket to be fitted to call points without the need for re-wiring the entire call point. Locating the one or more wires within the aperture may comprise passing the one or more wires through a gap in an arm of the bracket. The method may further comprise closing the gap after the one or more wires are located within the aperture. For example, closing the gap may comprise fastening a clip to close the gap.

In another embodiment the method may comprise clamping the bracket between the front panel and the rear panel. This is beneficial as the existing fixings and/or fastenings of the call point may be used to secure the bracket to the call point.

According to a yet further aspect of the present invention there is provided a method of fitting a light to a call point, the method comprising: positioning a bracket between a front panel and a rear panel of the call point; and securing a housing having a light source to the bracket; wherein positioning the bracket comprises clamping the bracket between the front panel and the rear panel of the call point.

Within the scope of this application it is expressly intended that the various aspects, embodiments, examples and alternatives set out in the preceding paragraphs, in the following description and drawings, and in particular the individual features thereof, may be taken independently or in any combination.

BRIEF DESCRIPTION OF THE DRAWINGS

One or more embodiments of the invention will now be described, by way of example only, with reference to the accompanying drawings, in which:

Figure 1 is a perspective view of a call point suitable for use with embodiments of the invention;

Figure 2 is a perspective view of the call point of Figure 1 fitted with a light according to an embodiment of the invention;

Figure 3 is schematic side view of the light and call point of Figure 2;

Figure 4 is a perspective view of a spacer bracket of the light of Figure 2; Figure 5 is a front view of the spacer bracket of Figure 4;

Figure 6 is an exploded perspective view of the light of Figure 2;

Figure 7 is a plan view of a lower housing and lens;

Figure 8 is a rear view of the spacer bracket of Figure 4;

Figure 9 is a perspective view of a spacer bracket according to another embodiment; and

Figure 10 is a flow chart outlining the steps of fitting the light to a call point.

DETAILED DESCRIPTION

In general terms embodiments of the invention relate to a light, for example an emergency light or a safety light for illuminating the front surface of a manual call point such that the call point is clearly visible and recognisable in an emergency situation. The safety light comprises a spacer bracket configured to be secured to the call point. For example, the spacer bracket may be secured between a front panel and a rear panel of the call point such that the spacer bracket can be retrofitted to existing call points. The safety light further comprises a housing attached to the spacer bracket. The housing comprises a light source for illuminating the front surface of the call point. Furthermore, the housing is secured to the spacer bracket such that the housing is located above and over-hanging the front surface of the call point. In this sense, the light source is typically positioned distally of a distal edge of the supporting flange.

The safety light can advantageously be retrofitted to existing call points. When the safety light is fitted to call points the safety light illuminates the front surface of the call point thereby making the call point instantly recognisable in an emergency situation. Alternatively, the safety light may be fitted to new call points such that the call points are illuminated and clearly visible and recognisable in an emergency situation. To place embodiments of the invention in a suitable context reference will firstly be made to Figure 1 which shows a manual call point 10 suitable for use with embodiments of the invention. The call point 10 comprises a front panel 12 and a rear panel 14 that are joined to form the external casing or shell of the call point 10. The casing of the call point 10 has a generally square profile with a substantially planar front surface 16. The front surface 16 of the front panel 12 comprises a frangible element 18 that a user may press or break to activate the alarm in an emergency situation. The front surface 16 of the call point 10 is positioned prominently within a building such that the call point 10 is quickly recognisable and identifiable in an emergency situation.

The manual call point 10 shown in Figure 1 is typical of call points found in Europe although the skilled reader will appreciate that the invention may be used with other manual call points that are commonly used around the world. For example, some call points may comprise a lever, a handle or the like on the front surface 16 that is pulled to activate the alarm in an emergency. However, the means of activating call points around the world is typically positioned on the front surface 16 and thus it is desirable that this surface is illuminated.

Figure 2 shows the call point 10 fitted with a safety light 20 according to an embodiment of the invention. The safety light 20 comprises a housing 22 having a light source (not shown in Figure 2) and a spacer bracket 24. The bracket 24 is fixed to and supports the housing 22 above the front surface 16 of the call point 10 such that the light source overhangs the front surface 16 of the call point 10. The bracket 24 is secured to the call point 10 thereby fixing the housing 22 relative to the call point 10.

The safety light 20 may further comprise a cover 26. The cover 26 is hingedly coupled to the housing 22 such that the cover 26 covers at least a portion of the front surface 16 of the call point 10 and is moveable to allow access to the frangible element 18, or to a lever ot handle or the like, to activate the call point 10. The cover 26 is a clear plastics material that allows the front surface 16 of the call point 10 to be viewed whilst preventing the call point 10 being inadvertently activated by a user. Furthermore, the cover 26 may also improve the illumination of the front surface 16 through light from the light source being reflected off the inner surface of the cover 26 towards the front surface 16 of the call point 10. The housing 22 may be a plastics housing or casing that is positioned above, and at least partially overhangs, the front surface 16 of the call point 10. The light source, within the housing 22, is positioned such that it provides down-lighting, thereby illuminating the front surface 16 of the call point 10. The over-hang of the housing 22 over the front surface 16 beneficially positions the light source distally of a distal end 72 of a supporting flange 34 (see Figure 3) such that the light source is positioned distally of the front surface 16. This beneficially allows the light source to illuminate the entire front surface 16 of the call point 10 with a high uniformity of illumination. For example, the uniformity of the illumination of the front surface 16 may be around 0.4 or more.

Figure 3 shows a schematic side view of the call point 10 fitted with the light 20. As shown in Figure 3 the spacer bracket 24 is positioned between the front panel 12 and rear panel 14 of the call point 10 and the supporting flange 34 is positioned above and extends over the top surface of the front panel 12. A distal end 72 of the supporting flange 34 is positioned distally of the front surface 16 of the call point 10 such that the supporting flange 34 partially over hangs the front surface of the call point 10.

The housing 22 is secured to the supporting flange 34 such that a portion of the housing 22 abuts the top surface of the supporting flange 34. A distal side 21 of the housing 22 is positioned distally of both the front surface 16 of the call point 10 and the distal end 72 of the supporting flange 34 such that a portion of the housing 22 overhangs both the front surface 16 and the supporting flange 34.

An aperture or slot 60 is positioned on the lower side of the housing 22 and a lens 62 is at least partially received within the slot 60. A light source 70 is positioned above the lens 62 and slot 60 such that light emitted from the light source 70 passes through the lens 62 and slot 60 to illuminate the front surface 16 of the call point 10. The light source 70, slot 60 and lens 62 are positioned within a distal portion of the housing 22 that overhangs the front surface 16 and the supporting flange 34 such that the light source 70, slot 60 and lens 62 are all positioned distally of the distal end 72 of the supporting flange 34. The lens 62 may be a rod lens that is configured to refract the light from the light source 70 towards the front surface 16 of the call point 10 such that the front surface 16 is illuminated substantially evenly. The light source 70 may be a series of LEDs or the like.

Figure 4 shows a perspective view of the spacer bracket 24 in isolation. The bracket 24 is a square frame with a central aperture 33. The bracket 24 is dimensioned such that the outer profile of the frame substantially matches the outer profile of the call point 10. This beneficially ensures the bracket 24 sits flush with the outer surface of the call point 10.

The bracket 24 comprises a frame 35 and a supporting flange 34 extending perpendicularly from a vertical plane of the frame 35. The vertical plane is a plane aligned with the frame 35 of the bracket 24. The frame 35 has a generally square outer profile that matches the outer profile of the call point 10. The frame 35 further comprises a pair of vertical side arms 40 that are joined by a lower horizontal member 37 and an upper horizontal member 39. An aperture 33 is defined by the side arms 40 and the lower and upper horizontal members 37, 39. The side arms 40 and the lower and upper horizontal members 37, 39 are aligned along the vertical plane such that the frame 35 has a substantially planar profile. The planar profile of the frame 24 beneficially allows the frame 24 to be located between the front and rear panels 12, 14 of the call point 10.

The lower horizontal arm 37 of the bracket 24 comprises a break or gap 90 such that the lower horizontal arm 37 comprises a pair of arms 92a, 92b. A clip 94 is secured to the arm 92b by a tether or deformable plastics element 96 that is moveable from a first position (as shown in Figure 4) in which the clip 94 does not secure the pair of arms 92a, 92b and a second position in which the clip 94 couples the pair of arms together thereby closing the gap 90. This is beneficial as the gap 90 allows wiring extending between the front panel 12 and the rear panel 14 of the call point 10 to be accommodated within the aperture 33 of the bracket 24 without having to re-wire the call point 10. This allows the bracket 24 to be fitted to the call point 10 quickly. The clip 94 may be closed or moved to the second position to close the gap 90 and secure the pair of arms 92a, 92b relative to each other when the wires are accommodated within the aperture 33 to prevent the vertical side arms 40 of the bracket 24 from splaying. The lower horizontal arm 37 comprises a tab 87 extending from the lower horizontal arm 37 into the aperture 33 along the plane of the frame 35. The tab 87 comprises two portions positioned at distal ends of the respective pair of arms 92a, 92b such that the tab 87, in its entirety, spans the gap 90. The tab 87 comprises clip engagement formations 89 for retaining the clip 94 when it is in the closed position. Extending the tab 87 into the aperture 33 beneficially provides a flush surface on the lower horizontal arm 37 beneath the tab 87 that the front and rear panels 12, 14 of the call point 10 may engage and clamp. The continuous engagement surface extending around the periphery of the frame 35 ensures that the front and rear panels 12, 14 of the call point 10 lie flush against the frame 35 to give a flush finish between the outer surface of the call point 10 and the bracket 24. The clip 94 is secured to the tab 87 via the deformable plastics element 96.

As best viewed in Figures 2 and 3, the frame 35 of the bracket 24 is secured to the call point 10 between the front panel 12 and the rear panel 14 of the call point 10. The frame 35 is clamped or sandwiched between the front and rear panels 12, 14 of the call point 10 thereby securing the frame 35 to the call point 10. The frame 35 is relatively thin in a direction perpendicular to the vertical plane of the frame 35. For example, the frame 35 may be between 1mm and 10mm thick such that the frame 35 can be positioned between the front and rear panels 12, 14 of the call point 10 without substantially altering the aesthetics or function of the call point 10.

Turning back to Figure 4, the supporting flange 34 is joined to, and extends from, the upper horizontal member 39. The supporting flange 34 extends perpendicularly from the upper horizontal member 39 in a distal direction from the vertical plane of the frame 35. The flange 34 is configured to engage and support the housing 22 to mount the housing 22 above the call point 10 such that a distal side 21 of the housing 22 and the light source 70 overhang the front surface 16 of the call point 10.

The supporting flange 34 comprises retention formations 38 to engage and grip the underside of the housing 22. The retention formations 38 may be a series of ridges or grooves extending laterally across the upper surface of the flange 34. The retention formations 38 may cooperate with corresponding retention features on a lower side of the lower housing 30 to position or index the lower housing 30 relative to the bracket 24. In particular, the retention formations 38 inhibit rotational movement of the housing 22 relative to the bracket 24. The retention formations 38 beneficially help to maintain the housing 22 substantially square to the bracket 24 such that the distal side 21 of the housing 22 is parallel with the vertical plane of the bracket 24.

The supporting flange 34 further comprises two grooves 57 or runners extending longitudinally over the top surface of the supporting flange 34. The grooves 57 are configured to receive corresponding rails or protrusions located on the lower side of the lower housing 30. The grooves 57 beneficially receive the corresponding rails on the underside of the housing 22 and act to locate the housing 22 and inhibit rotational movement of the housing 22 relative to the bracket 24.

The housing 22 is secured to the flange via a fastener, such as a screw, that is received within the aperture 41 on the flange 34. The flange 34 may comprise a plurality of apertures 41 arranged at differing distal positions on the flange 34 to vary the position of the housing 22.

Figure 5 shows a front view of the bracket 24. As shown in Figure 5 the bracket 24 further comprises two tabs 36 or formations for attaching the bracket 24 to the call point 10. The tabs 36 are disposed on opposing vertical arms 40 of the bracket 24 and extend inwardly from the vertical arms 40 towards the centre of the aperture 33. The tabs 36 are configured to engage or receive the screws that are used to secure the front panel 12 and rear panel 14 together such that the bracket 24 may be retained by the call point 10. Each tab 36 comprises a fastening formation, for example an aperture 50, a slot or a pair of jaws for receiving a fastener, such as a screw, to engage the tabs 36 and secure the bracket 24 to the call point 10.

As shown in Figure 5, each tab 36 comprises a wire frame 52 and an aperture 50. The wire frame 52 is made from a plastics material that allows the tab 36 to be elastically deformed from a first position (as shown in Figure 5) in which each tab 36extends substantially in-plane with the plane of the frame 35 and a second position in which each tab 36 is flexed or moved at least partially out of plane to accommodate a raised or protruding boss on the rear panel 14 of the call point 10. This is beneficial when the corresponding fastening feature on the rear panel 14 protrudes distally from the rear panel 14. Moving or flexing the tabs 36 to the second position allows the corresponding fastening feature on the rear panel 14 to be accommodated within the aperture 33 of the bracket 24 such that the bracket 24 sits flush between the front and rear panels 12, 14 of the call point 10.

Turning now to Figure 6, an exploded view of the light 20 is shown. The housing 22 comprises a lower housing 30 and an upper housing 31 or cover that together form the outer casing of the housing 22. The light source 70, for example a series of LEDs mounted on the PCB 32, is retained within the housing 22. The lower housing 30 further comprises a lens 62 (not visible in Figure 6) located beneath the light source 70. The light source 70 is positioned such that there is a gap between the light source 70 and the top surface of the lens 62. The gap may be between about 1mm and 5mm in size, for example, the gap may be 1 5mm.

Tabs located on the inner surface at opposing ends of the top housing 31 may abut the lens 62 thereby inhibiting movement of the lens 62 within the lower housing 30 such that the lens 62 is secured in position. The lens 62 may be a rod lens configured to receive light from the light source 70 and direct or refract the light towards the front surface 16 of the call point 10. The lower housing 30 comprises a slot 60 or elongated aperture (not visible in Figure 6) that is aligned with the lens 62 such that light emitted from the light source 70 passes through the slot 60 and is incident on the front surface 16 of the call point 10.

Figure 7 shows a plan view of the lower housing 30 with the PCB 32 removed for clarity. The lower housing 30 comprises a slot 60 extending laterally across a distal portion of the lower housing 30 for allowing light emitted from the light source 70 to be conveyed to the front surface 16 of the call point 10. The lens 62 is aligned with the slot 60. The lens 62 may be partially received within the slot 60 such that the slot 60 is used to position the lens 62 within the lower housing 30. For example, the lens 62 may be a rod lens that is dimensioned such that a portion of the rod lens engages the slot 60. The rod lens may have a diameter of between about 5mm and 15mm. For example, the lens 62 may have a diameter of 6mm. The light source 70 (not shown in Figure 7) is positioned between about 1mm and 5mm, preferably 1.5mm, above the lens 62. The lower housing 30 further comprises a positioning slot 64. The positioning slot 64 is an elongate slot 64 positioned proximally to, and extending orthogonally to, the aperture or slot 60. The positioning slot 64 is configured to receive a fastener, such as a screw, to secure the housing 22 to the supporting flange 34 via aperture 41. The positioning slot 64 allows the position of the housing 22 relative to the aperture 41 on the supporting flange 34 to be varied. This is beneficial as the positioning slot 64 enables the housing 22 to be moved in a fore-aft direction relative to the bracket 24 such that the distance the distal side 21 of the housing 22 overhangs the front surface 16 of the call point 10 can be varied. This allows the safety light 20 to be fitted to call points 10 of varying dimensions. Furthermore, controlling the overhang of the distal side 21, and thus of the light source, ensures that the light source may be positioned so as to provide substantially uniform illumination of the call point 10.

The lower housing 30 is secured to the upper housing 31 via screws extending through apertures 74 that engage corresponding threaded bosses on the inner surface of the upper housing 31. The upper housing 31 may also comprise a corresponding positioning slot (not shown) such that a screw may pass through the positioning slots on the lower and upper housings 30, 31 such that the lower and upper housings 30, 31 are secured together to form the housing 22. The fore-aft position of the housing 22 may subsequently be adjusted by moving the housing 22 in a fore-aft direction prior to securing the screw. This allows the overhang of the distal side 21 of the housing 22, and thus the position of the light source 70, to be adjusted.

The lower housing 30 comprises a notch 75 located on a proximal side 77 of the lower housing 30. The notch 75 allows a space for the wires to protrude from the housing when the lower and upper housings 30, 31 are secured together. The lower housing 30 further comprises strain relief formations 79 or protrusions that the wires are routed around to provide strain relief and to prevent the wire connector being pulled off the mating plug on the PCB 32. The wiring may deliver power to the PCB 32 and light source 70 within the housing 22 from the existing power supply for the call point 10. This beneficially allows the safety light 20 to be fitted to a call point and use the existing power supply.

Figure 8 shows the proximal side of the bracket 24. As shown in Figure 8 the bracket comprises a notch 85 defining a path from the supporting flange 34 to the central aperture 33 on the proximal side of the bracket 24. The notch 85 provides a route along which wiring may be routed from the PCB 32 to the wiring of the call point 10. Furthermore, the notch 85 on the proximal side of the bracket 24 is positioned such that it is aligned with the notch 75 located on the proximal side 77 of the lower housing 30. This is beneficial as the notches 75, 85 together form a path along which wiring may be routed from the PCB 32 to the wiring of the call point 10 such that power may be taken from the call point 10 to the PCB 32 and light source 70.

Turning now to Figure 9, a spacer bracket 24 according to another embodiment is shown. As shown in Figure 9, each tab 36 comprises a wire frame 52 and a pair of jaws 88. The pair of jaws 88 comprises an opening for receiving a screw to secure the front panel 12 to the rear panel 14. The screw may be at least partially received within the jaws 88 such that the bracket 24 is secured to the call point 10 by the screw.

The wire frame 52 is made from a plastics material that allows the tabs 36 to be elastically deformed from a first position (as shown in Figure 9) in which the pair of jaws 88 are each aligned with corresponding fastenings on the rear panel 14 of the call point 10 and a second position in which each pair of jaws 88 are moved laterally outwards toward the vertical leg 40 that the respective tab 36 is connected to. This is beneficial when the corresponding fastening feature on the rear panel 14 protrudes distally from the rear panel 14.

Figure 10 shows a flow chart outlining the steps of fitting the safety light 20 to a call point 10. In Step 801 the front panel 12 is removed from the call point 10 and the spacer bracket 24 is positioned between the front and rear panels 12, 14 of the call point 10 such that the bracket is positioned behind the front panel 12. To secure the spacer bracket 24 to the call point 10 the front panel 12 may be removed and wiring extending from the rear panel 14 to the front panel 12 may be passed through the gap 90 in the lower horizontal arm 37 of the bracket 24 such that the wiring is received within the central aperture 33 of the spacer bracket 24. The clip 94 is then moved to the second or closed position in which the gap 90 is closed and the bottom arms 92a, 92b are joined together to close the gap 90 and thus the aperture 33. In Step 802 the housing 22 is secured to the supporting flange 34 of the spacer bracket 24. Wiring from the PCB 32 and light source 70 are connected to the wiring that provides power to the call point 10. The supporting flange 34 is positioned above the top surface of the front panel 12. The housing 22 may be loosely secured to the supporting flange 34 such that the housing 22 may be moved in a fore-aft direction relative to the call point

10 to position the light source distally of the front surface 16 of the call point 10. Moving the housing 22 relative to the bracket 24 beneficially allows the light source to be positioned to maximise the uniformity of illumination of the front panel 16 of the call point 10. The front panel 12 may then be secured to the rear panel 14 via screws such that the spacer bracket 24 is secured to the call point 10 between the front and rear panels 12, 14.

In Step 803 the housing 22 is positioned relative to the spacer bracket 24 such that the slot 60 and light source 70 are positioned distally of the distal end 72 of the supporting flange 34. The housing 22 may be adjusted such that the light source 70 illuminates substantially all of the front surface 16 of the call point 10. In Step 804 the housing 22 is secured in position by, for example, tightening the screw to secure the position of the housing 22 and the cover 26 is attached to the housing 20. It will be appreciated that various changes and modifications can be made to the present invention without departing from the scope of the present application.