Patent Publication Number: US-9845936-B1

Title: Light shield with detachable panels for controlling light distribution

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This non-provisional patent application claims priority under 35 U.S.C. §119 to U.S. Provisional Patent Application No. 62/074,214, titled Light Shield with Detachable Panels, filed on Nov. 3, 2014, which is hereby fully incorporated herein by reference. 
    
    
     FIELD OF INVENTION 
     Embodiments of the invention relate generally to lighting, and more particularly to a light shield with detachable panels. 
     BACKGROUND 
     Luminaires are evolving from having a single light source, such as a bulb, to having an array of light sources, such as an array of light emitting diodes (LEDs) distributed over a wider area to achieve a wider distribution of light. While the wider distribution of light offers a variety of benefits, in some scenarios and circumstances it can pose challenges. For example, a luminaire that is set up to light a user&#39;s premise and property (residence) may emit light to a neighboring property due to the wider distribution of light. Similarly, some neighborhoods may have light distribution restrictions for various reasons, such as aesthetics, property value, and so on. Such, constraints may require the light distribution from a luminaire to be controlled such that the light is restricted to specific areas while being kept out of other areas. 
     Typically, to control the light distribution, a conventional light shield, such as the one shown in  FIG. 1  is used with the luminaire. The conventional light shield  102  illustrated in  FIG. 1  includes a metal or plastic sheet. Once installed, the conventional light shield  102  is fixed and is not adjustable, thereby greatly reducing flexibility in controlling the light distribution from the luminaire. In other words, the conventional light shield  102  provides only one light restriction pattern. For a different light restriction pattern, another conventional light shield that is shaped differently may be required. That is, each desired light restriction pattern may require a respective different light shield resulting in a myriad of different light shields to cover all desired light restriction patterns which is an inefficient and brute force solution. 
     Further, conventional light shields  102  add more weight to the luminaire causing undesirable wind load and stress on the mounting post  108 . Furthermore, as illustrated in  FIG. 1 , conventional light sheets  102  are configured to be coupled to a housing  106  of the luminaire  104  which limits the precision with which emitted light can be controlled as compared to a light shield that is coupled closer to the light source of the luminaire  104 . For example, as illustrated in the light shield arrangement of  FIG. 2 , individual light shields  206  are disposed adjacent to the light sources. However, in the arrangement shown in  FIG. 2 , each light source is coupled to their respective light shield, thus requiring numerous light shields in a single luminaire. 
     Accordingly, in light of the above discussion, there is a need for a light shield that overcomes the above-mentioned shortcomings. 
     SUMMARY 
     In one aspect, the present disclosure can relate to a light shield. The light shield includes a first broad surface having a first plurality of score lines and a second broad surface having a second plurality of score lines. The first broad surface is opposite the second broad surface. Further, the light shield includes a flange that extends substantially perpendicular to and along a length of a base platform of the light shield. The base platform is located at a bottom portion of the light shield and below the broad surfaces. Furthermore, the light shield includes a first interlocking arm extending from a first end of the flange, and a second interlocking arm extending from a second end of the flange that is opposite to the first end of the flange. 
     In another aspect, the present disclosure can relate to another light shield. The light shield includes a first main portion. The first main portion includes a first scored area that has a plurality of score lines that define one or more detachable panels. Further, the light shield includes a second overlap portion that is substantially perpendicular to and extends away from an edge of the first main portion. The second overlap portion includes a second scored area that has another plurality of score lines that define one or more detachable overlap panels. Furthermore, the light shield includes a flange disposed adjacent a bottom end of the light shield and extending substantially perpendicular to and along a length of the first main portion. The flange includes a first interlocking arm extending beyond the length of first main portion from a first end of the flange. Further the flange includes a second interlocking arm extending beyond the length of the first main portion from a second end of the flange that is opposite to the first end of the flange. The second interlocking arm extends in a direction opposite to the direction of the first interlocking arm. 
     In yet another aspect, the present disclosure can relate to a light shield that includes a light shield body. The light shield body includes a detachable panel area having one or more detachable panels, and a base platform disposed adjacent to the detachable panel area. Further, the light shield body includes a flange extending from a bottom portion of the base platform at an angle with respect to the base platform and the detachable panel area of the light shield body. Furthermore the light shield body includes a first interlocking arm extending from a first lateral end of the flange in a first direction of a longitudinal length of the flange, and a second interlocking arm extending from a second lateral end of the flange that is opposite to the first end of the flange in a second direction of the longitudinal length of the flange. The first direction and the second direction are opposite to each other. 
     These and other aspects, objects, features, and embodiments will be apparent from the following description and the appended claims. 
    
    
     
       BRIEF DESCRIPTION OF THE FIGURES 
       Embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which: 
         FIG. 1  illustrates a conventional light shield, in accordance with an example prior art embodiment; 
         FIG. 2  illustrates another arrangement of conventional light shields, in accordance with an example prior art embodiment; 
         FIG. 3  illustrates the light shield with detachable panels, in accordance with example embodiments of the present disclosure; 
         FIG. 4  illustrates the light shield of  FIG. 3  with one or more panels of the light shield detached in order to control light distribution, in accordance with example embodiments of the present disclosure; 
         FIG. 5  illustrates an interlocked light shield structure formed by interlocking two or more light shields, in accordance with example embodiments of the present disclosure; and 
         FIG. 6  illustrates a light shield absent the overlap portion, in accordance with example embodiments of the present disclosure. 
     
    
    
     Many aspects of the invention can be better understood with reference to the above drawings. The elements and features in the drawings are not to scale; emphasis is instead being placed upon clearly illustrating the principles of example embodiments of the present invention. Moreover, certain dimensions may be exaggerated to help visually convey such principles. In the drawings, reference numerals designate like or corresponding, but not necessarily identical, elements throughout the several views. Other features of the present embodiments will be apparent from the description that follows. 
     DETAILED DESCRIPTION OF EXAMPLE EMBODIMENTS 
     In the following paragraphs, the present disclosure will be described in further detail by way of examples with reference to the attached drawings. In the description, well known components, methods, and/or processing techniques are omitted or briefly described so as not to obscure the disclosure. As used herein, the “present disclosure” refers to any one of the embodiments of the disclosure described herein and any equivalents. Furthermore, reference to various feature(s) of the “present disclosure” is not to suggest that all embodiments must include the referenced feature(s). 
     The present disclosure is directed to an example light shield having detachable panels and capable of being coupled to a luminaire to control a light distribution from the luminaire. In particular, once the light shield is coupled to a luminaire, one or more of the detachable panels may be detached to allow an adjustment of the light distribution from a luminaire. Further, the light shield may be arrayed or interlocked with one or more other light shields on a periphery of the luminaire to provide an additional degree of control of the light distribution from the luminaire. 
     The technology of the present disclosure can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the technology to those having ordinary skill in the art. Furthermore, all “examples” or “exemplary embodiments” given herein are intended to be non-limiting and among others supported by representations of the present technology. 
       FIG. 3  illustrates the light shield  300  with detachable panels, in accordance with example embodiments of the present disclosure,  FIG. 4  illustrates the light shield  300  of  FIG. 3  with one or more panels detached in order to control light distribution, in accordance with example embodiments of the present disclosure, and  FIG. 5  illustrates an interlocked light shield structure formed by interlocking two or more light shields, in accordance with example embodiments of the present disclosure. Referring to  FIGS. 3-5 , the light shield  300  includes a shield body  301  that is made of plastic, metal, or any other suitable material. The shield body  301  includes a first broad surface  302 , a second broad surface  304  (not shown) that is opposite the first broad surface  302 . The first and second broad surfaces ( 302 ,  304 ) are bound by a first lateral edge  303 , a second lateral edge  307 , a first longitudinal edge  380 , and a second longitudinal edge (not shown) that is opposite to the first longitudinal edge  380 . Once installed, the second broad surface  304  may face the one or more light sources  204  of the luminaire, while the first broad surface  302  may face away from the light sources  204  in the direction of an external environment, as illustrated in  FIG. 5 . 
     In one example embodiment, the second broad surface  304  may have or may be coated with a dark color to absorb the light emitted from the light source  204 . In another example embodiment, the second broad surface  304  may have a reflective coating to reflect light away from the light shield  300 . That is, the reflective coating would increase an amount of light being directed away from an area where light is being restricted by the light shield  300 . In yet another example embodiment, the second broad surface  304  may be coated with material that would provide a mirror-like finish. One of ordinary skill in the art can understand and appreciate that a coating applied of the first broad surface  302  and/or the second broad surface  304  can be adapted and changed to achieve a variety of desired light distributions. 
     As shown in  FIG. 3 , the first broad surface  302  may include a first plurality of score lines, such as score lines  306   a  and  306   b  that run in a longitudinal and a latitudinal direction along the first broad surface  302  forming a grid pattern. Although not shown in  FIG. 3 , one of ordinary skill in the art can understand and appreciate the second broad surface  304  can include a second plurality of score lines that are similar to and aligned with the first plurality of score lines. Further, one of ordinary skill in the art can understand and appreciate that the grid pattern formed by the plurality of score lines (shown in  FIGS. 3-5 ) is only an example pattern, and is not restrictive. That is, the plurality of score lines may run in any direction along the first and/or second broad surfaces and form any other appropriate geometric or non-geometric patterns without departing from a broader scope of this disclosure. For example, the score lines may run only in one direction without crossing each other, i.e., either in a longitudinal direction or in a latitudinal direction along the first and/or second broad surface. Alternatively, in another example, the score lines may form circular patterns, hexagonal patterns, etc. 
     As illustrated in  FIG. 3 , the first plurality of score lines ( 306   a ,  306   b ) and the second plurality of score lines that are aligned with each other may define one or more panels  399 . That is, the score lines define a boundary of each panel  399 , and allow the panel  399  to be detached along a perimeter (boundary) of the panel  399  defined by the score lines ( 306   a ,  306   b ), as illustrated in  FIG. 4 . In other words, a user can detach each panel along the score lines that define a boundary of the respective panel by manually applying pressure. One of ordinary skill in the art can understand and appreciate that in an alternate embodiment the score lines can be replaced by other mechanisms such as tabs that permit the panels to be detached from the shield body  301  of the shield  300 . 
     As illustrated in  FIG. 4 , one or more panels  399  may be detached from the light shield  300  to control a distribution of the light from the luminaire. For example, once a panel is detached, the light shield  300  allows light from a luminaire to pass through the opening  402  formed by detaching the panel  399  from the light shield  300  as shown in  FIG. 4 . One of ordinary skill in the art can understand and appreciate that when more panels  399  are detached from the light shield  300 , the light from the luminaire gets distributed to a wider area than when all the panels of the light shield  300  are intact. That is, once light is emitted from the luminaire, a direction and intensity of the light distribution from the luminaire may be controlled using the panels  399  (and/or overlap panel  310  described below in the following paragraphs) that can be detached from the light shield  300 . Accordingly, the panels  399  provide a user with finer control of the light distribution from a luminaire. Even though  FIG. 4  shows panels detached from one corner of the light shield  300 , one of ordinary skill in the art can understand and appreciate that a variety of light distributions can be achieved by detaching various panels from any portion of the light shield  300 . For example, a panel could be removed from the center of the light shield  300  without removing any other surrounding panels to provide a “spot light” effect with a portion of the light passing through the center of the shield where the panel has been removed. 
     Referring back to  FIG. 3 , in addition to the first and second broad surfaces  302 ,  304 , the light shield  300  includes a first overlap surface  309  and a second overlap surface  308 . Alternatively, in some example embodiments, the light shield  300  may not include the overlap portion with the surfaces  308  and  309 . In one example embodiment, the first overlap surface  309  and the second overlap surface  308  may extend from one of the lateral edges of the shield body, e.g., lateral edge  303 , and may be substantially perpendicular to the shield body  301  in a direction facing the light source, as illustrated in  FIG. 3 . In another example embodiment, the first overlap surface  309  and the second overlap surface  308  may extend from one of the lateral edges of the shield body, e.g., lateral edge  303 , and may be aligned at an angle other than 90 degrees from the shield body  301 . Also shown in  FIG. 3  is a third plurality of score lines  360  on the first overlap surface  309 . One of ordinary skill in the art can understand and appreciate that the second overlap surface  308  may include a fourth plurality of score lines that are similar to and aligned with the third plurality of score lines  360 . The third and fourth plurality of score lines along with the lateral edge, e.g., edge  303  may define one or more overlap panels  310 . Similar to the panels  399  described above, the overlap panels  310  may be detached along their respective score lines (e.g., score lines  360  and score lines along the lateral edge  303 ) to provide control of the light distribution from a luminaire. As described above, one of ordinary skill in the art can understand and appreciate that score lines may be provided along the lateral edge  303  of the shield body  301  such that the overlap panel  310  can be broken off and separated from the panels  399  on the broad surfaces ( 302 ,  304 ). 
     The overlap panels  310  and the overlap surfaces  308 ,  309  provide better control of the light distribution from the luminaire around the edges and corners of the light shield  300 . The advantages of the overlap panels  310  and/or the overlap surfaces  308 ,  309  are more apparent in  FIG. 5 . As illustrated in  FIG. 5 , the overlap panels  310  and/or overlap surfaces  308 ,  309  prevent light from escaping through the corners of a light shield structure  500  formed by interlocking two or more light shields  300   a  and  300   b . The overlap surfaces  308 ,  309  and the broad surfaces  302 ,  304  can be formed as a single structure. That is, the overlap surfaces  308 ,  309  and the first and second broad surfaces  302 ,  304  can be integral to the shield body  301 . In said embodiment, the shield body  301  may be a single L-shaped structure where the score lines along the overlap surfaces may be extensions of the score lines along the broad surfaces. For example, score lines  360  on the first overlap surface  308  may be an extension of score lines  306   a  of the first broad surface  302 . In another embodiment, the overlap surfaces ( 308 ,  309 ) and the broad surfaces ( 302 ,  304 ) may be formed as separate members that may be coupled together at the time of installation to form the L-shaped light shield  300 . 
     In one example embodiment, the integral L-shaped light shield  300  may include a first main portion and a second overlap portion that is substantially perpendicular to the first main portion. The second overlap portion extends from a lateral edge (e.g., edge  303  and/or  307 ) of the first main portion. In some embodiments, the light shield  300  may have a third overlap portion that extends from an opposite lateral edge of the first main portion, thus forming a U-shaped light shield (not shown in Figures). The first main portion includes the first broad surface  302  and the second broad surface  304 , and the second overlap portion may include the first overlap surface  308  and the second overlap surface  309 . Further, the first main portion and the second overlap portion may include a base platform that may or may not include score lines. 
     In an embodiment where the base platform does not include score lines, the first main portion and the second main portion may be described as including (i) a scored portion that has the plurality of score lines and (ii) a base platform that does not include score lines and located below the scored portion at a bottom portion of the light shied body. The base platform will be described in greater detail in the following paragraphs. 
     In addition to the overlap surfaces ( 308 ,  309 ), overlap panels  310 , broad surfaces ( 302 ,  304 ), and panels  399 , as illustrated in  FIG. 3 , the light shield  300  includes a base platform  350  disposed at and/or adjacent a bottom end  390  of the shield body  301 . The base platform  350  includes a first portion  351  and a second portion  352  that extends substantially perpendicular to or at an angle from a lateral end of the first portion  351  in a direction of the overlap panel surfaces ( 308 , 309 ). The first portion  351  is aligned to be substantially flush with the broad surfaces ( 302 ,  304 ), while the second portion  352  is aligned to be substantially flush with the overlap surfaces ( 308 ,  309 ). The first and second plurality of score lines, e.g.,  306   a , may distinguish the panels  399  from the first portion  351  of the base platform  350 , and the third and fourth plurality of score lines  360  may distinguish overlap panels  310  from the second portion  352  of the base platform  350 , as illustrated in  FIG. 3 . Further, as described above, the base platform  350  may or may not have score lines. 
     In addition to the first and second portions ( 351 ,  352 ), the base platform  350  includes a flange  312  that extends substantially perpendicularly to first portion  351  along a length of the base platform  350  in a direction opposite to or away from the overlap panel surfaces ( 308 ,  309 ) and/or the light source (when the light shield  300  is in a luminaire. The flange  312  may have a top surface  311 , a bottom surface  313 , a first end  393 , and a second end  395  that is opposite to the first end  393 . Although the embodiment in  FIG. 3  shows a 90 degree angle between the flange  312  and the base platform  350 , in alternate embodiments the flange  312  may extend from the base platform  350  at an angle greater or less than 90 degrees so that the shield  300  is either angled inward toward the light source or outward away from the light source. 
     A first interlocking arm  314  extends from the first end  393  of the flange  312  and may be flush with the top surface  311  of the flange  312 . In particular, the first interlocking arm  314  extends from the first end  393  along a plane than passes through the length of the flange  312  and is substantially perpendicular to the broad surfaces ( 302 ,  304 ) of the shield body  301 . Further, as illustrated in  FIG. 3 , the first interlocking arm  314  includes a recess  315  and an aperture  320 . 
     A second interlocking arm  316  extends from the second end  395  of the flange  312 . In particular, the second interlocking arm  316  is flush with the bottom surface  313  of the flange  312  and is offset from top surface  311  of the flange  312 . As shown in  FIG. 3 , the second interlocking arm  316  extends in a direction opposite to the direction of the first interlocking arm  314  and includes an aperture  322 . 
     The first and the second interlocking arms ( 314 ,  316 ) of the light shield  300  may be configured to couple the light shield  300  with one or more other light shields by interlocking the light shield  300  with the one or more other light shields as illustrated in  FIG. 5 . In particular, the recess  315  of the light shield&#39;s first interlocking arm  314  may be configured to receive and fit a second interlocking arm of another light shield. In other words, the first interlocking arm  314  of the light shield  300  may be configured to mate with a second interlocking arm of another light shield, and the second interlocking arm  316  of the light shield  300  may be configured to mate with a first interlocking arm of another light shield. 
     The interlocking of one or more light shields to form an interlocked light shield structure  500  for providing an additional degree of control of the light distributed from the luminaire is better illustrated in the example embodiment of  FIG. 5 . In particular,  FIG. 5  illustrates a first light shield  300   a , a second light shield  300   b , a first interlocking arm  314   a  of the first light shield  300   a , a second interlocking arm  316   b  of the second light shield  300   b , one or more light sources  204 , a substrate  502  comprising the light sources, and one or more coupling holes  504  on the substrate. 
     The substrate  502  as illustrated in  FIG. 5  may comprise a circuit board on which the light sources  204  are disposed and a light transmitting cover placed over the circuit board and light sources  204 . In one example, the light sources  204  may be light emitting diodes, whereas in other examples, the light sources  204  may include any another appropriate source of light. Herein, the substrate  502  along with the light transmitting cover and the array of light sources  204  disposed on the substrate may be referred to as a ‘light panel’. In one example, as illustrated in  FIG. 5 , the light panel may take the shape of a square in which case the light panel may be referred to as a light square. However, one of ordinary skill in the art can understand and appreciate that the light panel can take any appropriate shape, such as a light bar (rectangular shape) as illustrated in  FIG. 2  without departing from a broader scope of this disclosure. Regardless of the shape of the light panel, the substrate  502  may include one or more coupling holes  504  for coupling the light shields  300  to the perimeter of substrate  502  as illustrated in  FIG. 5 . A light shield  300  may be coupled to the substrate  502  by placing the light shield  300  on the substrate  502  such that the aperture  320  of the first interlocking arm  314  and/or the aperture  322  of the second interlocking arm  316  is aligned with one or more coupling holes  504  of the substrate. Once the aperture  320  of the first interlocking arm  314  and/or the aperture  322  of the second interlocking arm  316  of the light shield  300  is aligned with one or more coupling holes  504  of the substrate  502 , a fastener may be placed through the aligned aperture and the coupling hole to securely couple the light shield  300  to the substrate  502 . 
     Further, as shown in  FIG. 5 , the first light shield  300   a  may be interlocked with the second light shield  300   b  by interlocking the first interlocking arm  314   a  of the first light shield  300   a  with the second interlocking arm  316   b  of the second light shield  300   b . In particular, to interlock the first light shield  300   a  with the second light shield  300   b , the recess  315  of the first interlocking arm  314   a  is mated with the second interlocking arm  316  of the second light shield  300   b  such that the aperture  320  of the first interlocking arm  314   a  is aligned with the aperture  322  of the second interlocking arm to receive a fastener therethrough. When the first light shield  300   a  is interlocked with the second light shield  300   b , the overlap panels  310  and/or overlap surfaces ( 308 ,  309 ) of one light shield may be covered by at least a portion of the broad surfaces ( 302 ,  304 ) of the other interlocked light shield, as illustrated in  FIG. 5 . In particular, when the first light shield  300   a  is interlocked with the second light shield  300   b , the first overlap surface  309  of the second light shield  300   b  may be covered and/or in contact with at least a portion of the second broad surface  304  of the first light shield  300   a.    
     Further, the first light shield  300   a  that is interlocked with the second light shield  300   b  may be coupled to the substrate  502  by aligning the aperture  320  of the first interlocking arm  314   a  and the aperture  322  of the second interlocking arm (that are aligned through interlocking as described above) with the coupling hole  504  of the substrate and placing a fastener therethrough. The fastener as described herein may include any appropriate coupling member, such as a screw, bolt, etc. Although only two light shields  300   a  and  300   b  are shown in  FIG. 5 , one of ordinary skill in the art can understand and appreciate that more light shields can be used and coupled to the perimeter of the substrate  502  without departing from a broader scope of this disclosure. For example, in  FIG. 5 , in addition to the existing two light shields  300   a  and  300   b , two more light shields may be interlocked and coupled to the perimeter of the substrate  502  to form an enclosed structure. 
     One of ordinary skill in the art can understand and appreciate that the broad surfaces ( 302 ,  304 ), the panels  399 , the overlap surfaces ( 308 ,  309 ), the overlap panels  310 , the base platform, the flange  312 , the first interlocking arm  314 , and the second interlocking arm  316  may all be integral to the shield body  301  and may be formed as a single light shield structure rather than individual components. In said embodiment, the broad surfaces ( 302 ,  304 ), the panels  399 , the overlap surfaces ( 308 ,  309 ), the overlap panels  310 , the base platform, the flange  312 , the first interlocking arm  314 , and the second interlocking arm  316  may be different portions of a single L-shaped light shield structure  300 . In an alternative embodiment, each of the broad surfaces ( 302 ,  304 ), the panels  399 , the overlap surfaces ( 308 ,  309 ), the overlap panels  310 , the base platform, the flange  312 , the first interlocking arm  314 , and the second interlocking arm  316  may be formed separately and may be coupled to each other at installation to form the light shield  300 . 
     Further, even though  FIGS. 3-5  illustrate the shield body  301  of the light shield  300  as having a flat planar shape, one of ordinary skill in the art can understand and appreciate that the shield body  301  of the light shield  300  can have any other appropriate geometric or non-geometric shape without departing from a broader scope of the present disclosure. For example, the shield body  301  may be curved, wave shaped, or circular in shape (cylindrical light shield body). In some embodiments, the light shield body may be flexible. Furthermore, one of ordinary skill in the art can understand and appreciate that in some example embodiments, the light shield  300  may not include the overlap surfaces ( 308 ,  309 ) and/or the flange  312  along with the interlocking arms ( 314 ,  316 ). For example,  FIG. 6  illustrates an embodiment of the light shield without the overlap portion (overlap surfaces  308 , 309 ). In an embodiment without the flange and interlocking arm, the light shield  300  may be mounted on the substrate  502  or luminaire using any other appropriate coupling and/or mounting mechanisms without departing from a broader scope of the present disclosure. 
     Turning to  FIG. 6 , this figure illustrates a light shield absent the overlap portion/overlap surfaces, in accordance with example embodiments of the present disclosure. In particular,  FIG. 6  illustrates a light shield having a light shield body  601  which is substantially similar to the light shield body  301  illustrated in  FIG. 3  except for the absence of an overlap portion having overlap surfaces ( 308 ,  308 ) and a corresponding base platform  352  associated with the overlap surfaces ( 308 ,  309 ). The light shield body  601  of  FIG. 6  includes a detachable panel area  620  (also interchangeably referred to as ‘scored area, score line area, or broad surface having score lines’ throughout this disclosure) having one or more score lines  306   a ,  306   b  that define one or detachable panels  399 . Further, the light shield body  601  includes a base platform  650  positioned below the detachable panel area  620 . The base platform  650  may or may not include score lines. Furthermore, the light shield body  601  may include a flange  312  that extends from a bottom portion of the base platform  650 . In particular, the flange  312  may extend substantially perpendicular to the base platform  652  and the detachable panel area  620 . The flange  312  may include two interlocking arms  314  and  316  extending from lateral ends  393  and  395  of the flange  312 , respectively. The flange  312  and the two interlocking arms  314 ,  316  have been described above in association with  FIG. 3 . Accordingly, their description will not be repeated herein for sake of brevity. Further, the panels  399  may be detachable along the edges or from the center as desired and as described above in association with  FIGS. 3 and 4 . 
     One of ordinary skill in the art can understand and appreciate that even though the detachable panels are illustrated as rectangular panels, in other embodiments, the detachable panel may have any other appropriate geometric or non-geometric shape without departing from a broader scope of the present disclosure. 
     Many modifications and other embodiments of the inventions set forth herein will come to mind to one skilled in the art to which these inventions pertain having the benefit of the teachings presented in the foregoing descriptions and the associated drawings. Therefore, it is to be understood that the inventions are not to be limited to the specific embodiments disclosed and that modifications and other embodiments are intended to be included within the scope of this application. Although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.