FORM 2
THE PATENTS ACT, 1970
(39 OF 1970)
As amended by the Patents (Amendment) Act, 2005
&
The Patents Rules, 2003
As amended by the Patents (Amendment) Rules, 2006
COMPLETE SPECIFICATION
(See section 10 and rule 13)
TITLE OF INVENTION
Lighting fixture with adjustable luminous characteristics
APPLICANTS :
Crompton Greaves Limited, CG House, Dr Annie Besant Road, Worli, Mumbai 400 030, Maharashtra, India, an Indian Company
INVENTOR (S):
Jain Vaibhav of Crompton Greaves Limited, Lighting (LI) Division, Crompton Greaves Ltd, Kanjurmarg (east), Mumbai - 400042, Maharashtra, India; an Indian National.
PREAMBLE TO THE DESCRIPTION:
The following specification particularly describes the nature of this invention and the manner in which it is to be performed:

Field of the Invention:
This invention relates to lighting systems and lighting fixtures, thereof.
Particularly, this invention relates to a lighting fixture with adjustable luminous characteristics.
Background of the Invention:
A lighting fixture typically includes a reflector and a light source with the reflector. The reflector ensures the focus parameters of the beam from the light source. Sharper focus or relatively blunter focus can be obtained through various reflectors. Spotlights are light fixtures with a relatively sharper focus.
Lighting fixtures with a focused beam are used in retails shops or display shelves or the like environment wherein a focused beam is targeted towards an object or item or group of objects on display. As the item changes, its size and shape may change. The need of the focusing parameters of the beam may change. Hence, for instance, on one occasion a sharper focus beam may be a need of the hour, while on another occasion, a larger focus beam may be needed. For such purposes, it is inconvenient for the retail shop owner or the display manager to keep on changing the fixture.
Typically, these lighting fixtures are ceiling mounted seamlessly with the false ceiling of the room. It is not possible each time to scrape out or screw out the lighting fixture and then change the lamp and the reflector to provide a sharper or a blunter focus. Even if it was easy to change the fixture and reflector, the size and shape of the lamp assembly would keep on changing. This would mean that the hole provided on the ceiling would not allow seamless blending of the lighting fixture into it.

There is a need for a modular design. Prior Art:
US2007217198 discloses a Lighting Device with Adjustable Spotlight Beam. Although, the lighting device includes an adjusting mechanism adjustable to move the first and second magnifier lenses relative to the light source to adjust the size of the light beam and provide a substantially uniform light beam, there is not provided a fixture for providing multiple luminous characteristics.
GB2456123 discloses a Light emitting diode lamp. A light emitting diode lamp is described, wherein the reflector comprises a central reflector section in which the first light emitting diode is provided, and three peripheral reflector sections in which the three second light emitting diodes or the two second light emitting diodes and the third light emitting diode are respectively provided, the three peripheral reflector sections being provided around the central reflector section and being in optical communication with the central reflector section such that light emitted by the first light emitting diode is directed out of the central reflector section and into the peripheral reflector sections where it mixes with light emitted by the second or second and third light emitting diodes (to get white light). However, multiple luminous characteristics is not achieved.
Objects of the Invention:
An object of the invention is to provide a modular lighting fixture.
Another object of the invention is to provide a modular lighting fixture with adjustable beam or luminous characteristics.

Yet another object of the invention is to provide a modular lighting fixture with adjustable beam or luminous characteristics, which is easily usable by a user.
Still another object of the invention is to provide a single fixture with multiple focus beam options or multiple luminous characteristics.
Summary of the Invention:
According to this invention, there is provided a lighting fixture with adjustable luminous characteristics, said fixture comprises:
a. a series of reflectors placed linearly adjacent to one another, each of said
reflectors having a light emitting surface and body for providing different
luminous characteristics;
b. first plate adapted to connect each of said reflectors to one another at their
light emitting surface, said reflectors extending out of said first plate;
c. slotted plate adapted to receive each reflector individually, said slot co-
axially matching said operative light emitting surface of said reflector, thus
provisioning a complete lighting fixture with the corresponding luminous
characteristic;
d. pair of lateral vertical walls, extending from said slotted plate, said lateral
walls defined across diametrically opposite sides of said slot with the width
between said pair of lateral walls more than the width of said first plate in
order to ensure that said first plate slides through the width-wise gap;
e. rails along said operative inner lateral vertical walls for guiding said first
plate's operative horizontal movement in order to co-axially locate one
reflector from the series of reflectors above the slot, thereby changing the
type of luminous characteristics as defined by the reflector;

f. inclined slots on each of said lateral wall, said inclined slots running along
the length of said lateral wall;
g. C-bracket adapted to grasp a reflector over said slotted plate, said C-bracket
having arm members mating with said lateral walls in a corresponding
manner with a bridge member between said arms spread across the reflector,
said bridge member adapted in design to exert appropriate pressure over said
reflector to ensure a locked position of said reflector over said slot;
h. extension member of said C-bracket located on an inner surface of one of said arm members adapted to fit into said operative inclined slot of said lateral wall, such that as the extension member slides up and down said incline of said inclined slot, said C-bracket lifts up or down correspondingly to ensures loosening and tightening of the C-bracket and the reflector, thereby;
i. lever mechanism adapted to allow loosening and tightening of said C-bracket in order to allow one reflector from the series of reflectors to be disengaged from its co-axial position over said slot and to allow another reflector from the series of reflectors to be slid in over said slot, before being fastened by said C-bracket;
j. linear slit located diametrically across said curved slot on said slotted plate; and
k. plurality of holes provided at pre-determined positions on said first plate adapted to match with the ends of said linear slit when each of said reflector is operatively co-axial with said slot of said slotted plate, thereby providing a guiding means to ensure correct co-axial matching.

Typically, said fixture includes a common heat sink attached to said C-bracket extending operatively outwards from said C-bracket.
Typically, said fixture includes a motor adapted to drive the operative horizontal motion of the plate.
Typically, said lateral walls are curved walls, said curve matching the curve of the slotted plate.
Typically, said slotted plate is a round (mounting) plate with said slot being a concentric round slot.
Typically, said lever mechanism comprises:
a)curved slot, on said plate, beneath one of said lateral vertical walls and matching the curvature of said lateral wall; and
b) extension bracket which mates with the lower ends of the arm members of said C-bracket, said extension bracket being an L-shaped bracket with its one arm mating with the lower portion of the arm member, and the other arm through the slot and parallel to said plate, thus providing an angularly displaced motion for the L-shaped extension bracket and subsequently causing lifting up and down motion of the C-bracket.
Brief Description of the Accompanying Drawings-*
The invention will now be described in relation to the accompanying drawings, in which:

Figure 1 illustrates a top isometric view of the lighting fixture;
Figure 2 illustrates a bottom isometric view of the lighting fixture;
Figure 3 illustrates a side view of the lighting fixture;
Figure 4 illustrates a top view of the lighting fixture; and
Figure 5 illustrates various operative embodiment of the lighting fixture.
Detailed Description of the Accompanying Drawings:
According to this invention, there is provided a lighting fixture (100) with adjustable luminous characteristics.
Figure 1 illustrates a top isometric view of the lighting fixture;
Figure 2 illustrates a bottom isometric view of the lighting fixture;
Figure 3 illustrates a side view of the lighting fixture;
Figure 4 illustrates a top view of the lighting fixture; and
Figure 5 illustrates various operative embodiment of the lighting fixture.
In accordance with an embodiment of this invention, there is provided a series of reflectors (12, 14, 16) placed linearly adjacent to one another. There is a first plate

(18) which connects the reflector to one another. The reflectors extend out of the first plate (18) into the ceiling or housing where the fixture (100) is installed. Each of these reflectors provides different luminous characteristics to the lighting fixture.
In accordance with another embodiment of this invention, there is provided a slotted plate (20) adapted to receive each reflector (12, 14, 16) individually. The slot (22) matches with the operative light emitting surface (24) of the reflector, thus provisioning a complete lighting fixture (100). This slotted plate (20) is in line with the ceiling or housing where the fixture is to be installed. The slotted plate (20) seamlessly matches in-line with the ceiling, thus providing a concealed lighting fixture. Preferably the slotted plate (20) is a round (mounting) plate and the slot (22) is a concentric round slot.
In accordance with another embodiment of this invention, the slotted plate (20) includes a pair of lateral walls (26) defined across diametrically opposite sides; the width between the pair of lateral walls equivalent or more than the width of the first plate (18) in order to ensure that the first plate (18) may slide through the width-wise gap. There are provided rails (28) along the operative inner lateral walls (26) for guiding the first plate's (18) operative horizontal movement. At any given operative condition of working, only one of the reflectors from the series of reflectors (12, 14, 16) is located above the slot (22). Thus, only one type of luminous characteristics is achieved. As the first plate (18) moves operatively horizontally, the reflectors (12, 14, 16) resident on it move. Each of the reflectors (12, 14, 16) may, therefore, be located above the slot (22) as and when required by the user to provide a different luminous characteristic based fixture. Preferably, the

lateral walls (26) are curved walls, said curve matching the curve of the slotted plate (20). Each of the lateral walls (26) is provided with matching operatively inclined slots (30).
In accordance with yet another embodiment of this invention, there is provided a C-bracket (32) adapted to grasp a reflector (12, 14, 16) over the housing. As the reflectors (12, 14, 16) move, they enter into a position such that the lateral walls (26) flank the sides of the reflector (12, 14, 16). The C-bracket (32), therefore, has its arm members (32a) mating with the lateral walls (26) in a corresponding manner with the bridge member (32b) between the arms (32a) spread across the reflector housing. The bridge member (32b) may be adapted in design to exert appropriate pressure over the reflector (12, 14, 16) to ensure a locked position of the reflector (12, 14, 16) over the slot (22). The C-bracket (32) includes an extension member (34) on the inner surface of the arm members (32a) which fit into the operative inclined slots (30). As the extension member (34) slides up and down the incline, the C-bracket (32) lifts up or down correspondingly. This ensures the loosening and tightening mechanism of the C-bracket (32) and the reflector (12, 14, 16), thereby.
Reference numeral 36 refers to a heat sink placed above the reflector. The heat sink (36) is common and is attached to the C-bracket (32), as shown. Hence, a common heat sink (36) suffices all the reflectors (12, 14, 16) in their operative configurations.
In accordance with still another embodiment of this invention, there is provided a lever mechanism (38) to allow loosening and tightening of the C-bracket (32) in

order to allow one reflector (16) to be disengaged from its position over the slot (22) and another reflector (14) to be slid in over the slot (22), before being fastened by the C-bracket (32). The lever mechanism (38) includes an extension bracket which mates with the lower ends of the arm members of the C-bracket (32). The slotted plate (20) includes a curved slot (40) beneath one of said lateral walls (26) and matching the curvature of the lateral wall (26). The extension bracket (38) is an L-shaped bracket with its one arm (38a) mating with the lower portion of the arm member, and the other arm (38b) through the slot (40) and parallel to the slotted plate (20). Thus, as the other arm (38b) of the extension bracket (38) is moved about the curvature of the slot (40), it moves the arm member (32a) of the C-bracket (32) along the incline (30) thus loosening or tightening the grip of the bridge member (32b) of the C-bracket (32) over the reflector (16).
In accordance with an additional embodiment of this invention, there is provided a linear slit (42) diametrically across said curved slot on the slotted plate (20). A plurality of holes (44) are provided at pre-determined positions on the first plate (18) such that when a reflector (14) sits atop the slot (22) of the slotted plate (20), the hole (44) is positioned at an end of the linear slit (42) of the slotted plate (20). This hole (44) provides a grip for a screw-driver or the like tool to be inserted so as to guide the first plate (18) from one operative horizontal position engaging one reflector (16) to engaging another reflector (14) to still another reflector (12). The hole (44) has to be guided to the end of the linear slit (42) so as to accurately position the reflector surface (24) over the slot (22). An end reflector (16) is first placed in its operative configuration. Here, the hole (44) is at a first end of the linear slit (42). This hole (44) is then dragged to the second end of the linear slit (42), thereby dragging the first plate (18) and the reflector (16) along with it and

away from the slot (22). As the hole (44) reaches the second end, the second reflector (14) is placed over the slot (22), thereby engaging the second reflector (14). By this movement, a second hole (44) appears over the first end of the linear slit (42). When the second hole (44) is moved from its second end to the first end of the linear slit (42), the first plate (18) and the reflector (14) moves away, bringing a third reflector (12) above the slot (22). Still another hole now appears at the first end. Thus, the holes (44) are provisioned to accurately guide the reflector over the slot (22) of the slotted plate (20)
In accordance with another embodiment of this invention, there is provided a motor adapted to guide the operative horizontal motion of the first plate (18).
While this detailed description has disclosed certain specific embodiments of the present invention for illustrative purposes, various modifications will be apparent to those skilled in the art which do not constitute departures from the spirit and scope of the invention as defined in the following claims, and it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the invention and not as a limitation,

We claim,
1. A lighting fixture with adjustable luminous characteristics, said fixture comprising:
a. a series of reflectors placed linearly adjacent to one another, each of said
reflectors having a light emitting surface and body for providing different
luminous characteristics;
b. first plate adapted to connect each of said reflectors to one another at their
light emitting surface, said reflectors extending out of said first plate;
c. slotted plate adapted to receive each reflector individually, said slot co-
axially matching said operative light emitting surface of said reflector, thus
provisioning a complete lighting fixture with the corresponding luminous
characteristic;
d. pair of lateral vertical walls, extending from said slotted plate, said lateral
walls defined across diametrically opposite sides of said slot with the width
between said pair of lateral walls more than the width of said first plate in
order to ensure that said first plate slides through the width-wise gap;
e. rails along said operative inner lateral vertical walls for guiding said first
plate's operative horizontal movement in order to co-axially locate one
reflector from the series of reflectors above the slot, thereby changing the
type of luminous characteristics as defined by the reflector;
f. inclined slots on each of said lateral wall, said inclined slots running along
the length of said lateral wall;
g. C-bracket adapted to grasp a reflector over said slotted plate, said C-bracket
having arm members mating with said lateral walls in a corresponding
manner with a bridge member between said arms spread across the reflector,

said bridge member adapted in design to exert appropriate pressure over said reflector to ensure a locked position of said reflector over said slot;
h. extension member of said C-bracket located on an inner surface of one of said arm members adapted to fit into said operative inclined slot of said lateral wall, such that as the extension member slides up and down said incline of said inclined slot, said C-bracket lifts up or down correspondingly to ensures loosening and tightening of the C-bracket and the reflector, thereby;
i. lever mechanism adapted to allow loosening and tightening of said C-bracket in order to allow one reflector from the series of reflectors to be disengaged from its co-axial position over said slot and to allow another reflector from the series of reflectors to be slid in over said slot, before being fastened by said C-bracket;
j. linear slit located diametrically across said curved slot on said slotted plate; and
k. plurality of holes provided at pre-determined positions on said first plate adapted to match with the ends of said linear slit when each of said reflector is operatively co-axial with said slot of said slotted plate, thereby providing a guiding means to ensure correct co-axial matching.
2. A fixture as claimed in claim 1 wherein, said fixture includes a common heat sink attached to said C-bracket extending operatively outwards from said C-bracket.
3. A fixture as claimed in claim 1 wherein, said fixture includes a motor adapted to drive the operative horizontal motion of the plate.

4. A fixture as claimed in claim 1 wherein, said lateral walls are curved walls, said curve matching the curve of the slotted plate.
5. A fixture as claimed in claim 1 wherein, said slotted plate is a round (mounting) plate with said slot being a concentric round slot.
6. A fixture as claimed in claim 1 wherein, said lever mechanism comprising:
a. curved slot, on said plate, beneath one of said lateral vertical walls and
matching the curvature of said lateral wall; and
b. extension bracket which mates with the lower ends of the arm members of
said C-bracket, said extension bracket being an L-shaped bracket with its
one arm mating with the lower portion of the arm member, and the other arm
through the slot and parallel to said plate, thus providing an angularly
displaced motion for the L-shaped extension bracket and subsequently
causing lifting up and down motion of the C-bracket.