Abstract:
A display mount is attached to a slatwall using an improved slatwall hanger. The display mount includes vertically pivoting arms providing forward and rearward movement of the display with only slight vertical movement. The slatwall hanger is attached to the slatwall by sandwiching at least one vertical face of a slat between a cover and a clamping member. The cover includes at least one outer lip residing against the front of the vertical face and the clamping member includes at least one inner lip residing against the rear of the vertical face. The clamping member is biased away from the cover by a spring to facilitate insertion of the inner lips between open spaces between consecutive slats. Screws connect the clamping member to the cover and are tightened to grasp the vertical slat face between the lips.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    The present invention relates to display mounts and in particular to an improved display mount including an improved load bearing slatwall equipment hanger. 
         [0002]    In some control center environments, visual access to displays is critical in performing vital functions. Display mounts must provide adjustment for the best viewing positions to minimize fatigue. Known monitor mounts include stacked pivoting arms which provide movement in literally any direction. In some applications there is a desire to restrict movement to in-out for the arm while maintaining a tilt/pivot motion of the monitor. Such in-out motion could be achieved using a parallel horizontal arm structure. Unfortunately, parallel horizontal arms cannot efficiently support the weight of some monitors. 
         [0003]    Other known display mounts include slides for forward and rearward motion. At full extension such slides have reduced rigidity and may bind or fail. Additionally, sliding mounts require two slides for stability, much like a drawer would have. The two slides on a carriage may feel reasonably stable in the closed position, but as the slides approach the extended position there is excessive lateral instability and there is nothing forcing the slides to extend synchronously, and a slide mount which requires a short compressed length has poor stability when extended. 
         [0004]    Further, display mounts are often mounted to a slatwall and are attached to the slatwall using equipment hangers and clamps. Such slatwalls comprises a multiplicity of vertically spaced apart parallel horizontal slats (e.g., “T” shaped features). The slatwall hangers may include either an offset which hooks in and up, or a “J” that hooks in and down. The slatwall provides an easily reconfigurable mounting system which simple addition, removal, and adjustment of hangers. 
         [0005]    Some equipment requires clamping the hangers to the slatwall to fix the hanger position preventing the easy movement of the hangers. Known slatwall clamps reach above a higher slat and below a lower slat, and are draw together to clamp the hanger to the slatwall. While this provides an effective method of securing the hanger, because the vertically opposed clamps are drawn together, the amount of vertical force exerted on the slats may be excessive, causing stress on a horizontal portion of the slat, and sometimes breaking the slat even before any load is applied by the hanger. 
         [0006]    With very heavy loads and long lever arms, the stress on the slat can be excessive. This coupled with the stress from the opposing clamps makes the slat the weak link in the assembly. 
         [0007]    Because installations may require a large number of hangers, clamps and clips to be attached to the slatwall, the horizontal portion of the slats can not be made thicker. Therefore, a need exists for a hanger which reduces that stress on a standard slatwall structure. 
       BRIEF SUMMARY OF THE INVENTION 
       [0008]    The present invention addresses the above and other needs by providing a display mount which is attached to a slatwall using an improved slatwall hanger. The display mount includes vertically pivoting arms providing forward and rearward movement of the display with only slight vertical movement. The slatwall hanger is attached to the slatwall by sandwiching at least one vertical face of a slat between a cover and a clamping member. The cover includes at least one outer lip residing against the front of the vertical face and the clamping member includes at least one inner lip residing against the rear of the vertical face. The clamping member is biased away from the cover by a spring to facilitate insertion of the inner lips between open spaces between consecutive slats. Screws connect the clamping member to the cover and are tightened to grasp the vertical slat face between the lips. 
         [0009]    In accordance with one aspect of the invention, there is provided a Touch Entry Device (TED) mount having parallel pivoting on horizontal axles providing maximum stability and minimizing the mounting envelope and provide a tighter compresses length that slides. The parallel arms pivot in a vertical plane from a rearward reposition, to a vertical position, to a forward position, holding a moveable carrier parallel to a fixed hanger. The arms pivot through small angles minimizing vertical carrier motion while providing adequate horizontal motion. The weight of the arms, carrier, and monitor applies torque to pin and sleeve assemblies of the horizontal axle pairs pushing to each pin and sleeve of each axle pair to opposite sides creating rotational friction in the axles, rather than sliding friction, provides a rigid yet smooth feel through the stroke. 
         [0010]    In accordance with another aspect of the invention, there is provided a TED mount having arms only be slightly wider than the pivoting mechanism in order to rotate a monitor without interference. The horizontal axles allow having an arm width is only limited by our mounting envelope. Vertical axles would allow a greater vertical size requires a narrower arm width. The wider arm allowed by the horizontal axle provides better left-to-right stability and the geometry of the arms provides more than adequate vertical stability because the weight of the assembly, including the monitor, is holding the parallel arm in a rested position. 
         [0011]    In accordance with yet another aspect of the invention, there is provided a TED mount having arms comprising opposing C-channels which partially overlapping but do not touch. The C-channel arm design provides greater strength than blades blade, overlap to eliminate pinch points, and are opposing to create a closed box look. The front arm includes inset lips with enter the rear arm, allowing the front arm to ride inside the rear arm, and eliminating pinch points. As the arms swing their separation changes, but the inset lips fill the gap over the range of arm motion. The inset lips of the front arm allows the bodies of the front and rear arms to be the same width and use the same pivot hardware used with the other axles of the TED mount, and still closes off the box, eliminating the pinch points. 
         [0012]    In accordance with still another aspect of the invention, there is provided a TED mount having a hanger and carrier which are closed boxes for strength and aesthetics, and include ribs which provide stops to limit forward and rearward motion of the arms. 
         [0013]    In accordance with another aspect of the invention, there is provided a TED mount having a triangular shaped hanger to act as a gusset, maximizing strength at the TED mount while minimizing the vertical height at the front where the equipment boxes are pivoting. 
         [0014]    In accordance with yet another aspect of the invention, there is provided a TED mount having a hanger and carrier including reliefs cut into the hanger and carrier above and below the axles. The reliefs allow the interior dimensions of the hanger and carrier to be somewhat greater than the axle sleeves while allowing axle attachment portions of the hanger and carries to be compressed against the sleeves when the axle bolts are tightened—eliminating the twisting of the hanger and carrier which would otherwise occur. 
         [0015]    In accordance with another aspect of the invention, there is provided a TED mount having rotating cable ties. The rotating ties allow cables to rotate when the carrier is moved to reduce stress on the cables. 
         [0016]    In accordance with another aspect of the invention, there is provided a slatwall hanger which eliminate stress created by known clamp on hangers. The slat wall hanger includes opposing inner and outer lips which sandwich vertical faces of the slats and do not apply vertical forces to the slats. The inner lips are inserted between the vertical slat members and dropped into position behind the vertical slat members. The inner and outer lips are then drawn together to horizontally sandwich the vertical slat members, applying no vertical clamping force on the slats. Such sandwiching the vertical slat members eliminates of the stress on the slat that&#39;s associated with the known clamping action. As a result, the slats can carry more weight without making the slats physically larger to increase strength, with a resulting loss in the number of hangers which may be attached to the slatwall. 
         [0017]    In accordance with another aspect of the invention, there is provided a slatwall hanger which sandwiches the vertical slat members between inner and outer lips rather than grasping vertically spaced apart slats. Rubber bumpers and/or rubber stick-on pads are attached to the outer lips to protect vertical faces of the slats from scratches. 
         [0018]    In accordance with still another aspect of the invention, there is provided a slatwall hanger having inner and out lips biased apart. In order to engage the slatwall, the inner lip has to be pushed inward between adjacent slats. The larger the slatwall hanger, the more difficult this installation method is. To improve the ease of installation, a spring is incorporated biasing the inner and outer lips apart, making it easier to engage the slatwall hanger with the slatwall. After positioning the slatwall hanger on the slatwall, the lips are drawn together using screw, levers, or other mechanical apparatus. 
     
    
     
       BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING 
         [0019]    The above and other aspects, features and advantages of the present invention will be more apparent from the following more particular description thereof, presented in conjunction with the following drawings wherein: 
           [0020]      FIG. 1  shows a perspective view of a slat wall and two embodiments of controlled stress hangers according to the present invention. 
           [0021]      FIG. 2  is a cross-sectional view of the second embodiment of the controlled stress hanger according to the present invention taken along line  2 - 2  of  FIG. 1 . 
           [0022]      FIG. 3  shows cover and clamping members of the first embodiment of the controlled stress hanger according to the present invention. 
           [0023]      FIG. 4A  shows a front view of the first embodiment of the controlled stress hanger according to the present invention. 
           [0024]      FIG. 4B  shows a rear view of the first embodiment of the controlled stress hanger according to the present invention. 
           [0025]      FIG. 5  shows cover and clamping members of the second embodiment of the controlled stress hanger according to the present invention. 
           [0026]      FIG. 6A  shows a front view of the second embodiment of the controlled stress hanger according to the present invention. 
           [0027]      FIG. 6B  shows a rear view of the second embodiment of the controlled stress hanger according to the present invention. 
           [0028]      FIG. 7A  shows a narrow version of the clamping member of the first embodiment of the controlled stress hanger according to the present invention. 
           [0029]      FIG. 7B  shows a wide version of the clamping member of the first embodiment of the controlled stress hanger according to the present invention. 
           [0030]      FIG. 7C  shows a short version of the clamping member of the first embodiment of the controlled stress hanger according to the present invention. 
           [0031]      FIG. 7D  shows a tall version of the cover member of the first embodiment of the controlled stress hanger according to the present invention. 
           [0032]      FIG. 8A  shows a cover member of the second embodiment of the controlled stress hanger according to the present invention having inward reaching vertical right and left outer lips according to the present invention. 
           [0033]      FIG. 8B  shows a cover member of the second embodiment of the controlled stress hanger according to the present invention having the inward reaching vertical right and left outer lips and an inward reaching bottom inner lip according to the present invention. 
           [0034]      FIG. 8C  shows a cover member of the second embodiment of the controlled stress hanger according to the present invention having the inward reaching vertical right and left outer lips and the inward reaching bottom inner lip and an inward reaching top inner lip according to the present invention. 
           [0035]      FIG. 8D  shows a cover member of the second embodiment of the controlled stress hanger according to the present invention having the inward reaching vertical right and left outer lips and outward reaching top and bottom outer lips according to the present invention. 
           [0036]      FIG. 9A  shows a clamping member having notches on opposite ends of top and bottom inner lips according to the present invention. 
           [0037]      FIG. 9B  shows a clamping member having notches on opposite ends of the top inner lip only, according to the present invention. 
           [0038]      FIG. 9C  shows a clamping member without notches on opposite ends of the inner lips, according to the present invention. 
           [0039]      FIG. 10  shows a perspective view of a spring member for biasing the cover and clamping members apart, according to the present invention. 
           [0040]      FIG. 11A  shows a front view of the spring member according to the present invention. 
           [0041]      FIG. 11B  shows a side view of the spring member according to the present invention. 
           [0042]      FIG. 11C  shows a top view of the spring member according to the present invention. 
           [0043]      FIG. 12  is a perspective view of a Touch Entry Device (TED) mount according to the present invention in a rearward position. 
           [0044]      FIG. 13A  is a front of the TED mount according to the present invention in a rearward position. 
           [0045]      FIG. 13B  is a side of the TED mount according to the present invention in a rearward position. 
           [0046]      FIG. 14  is a perspective view of the TED mount according to the present invention in a forward position. 
           [0047]      FIG. 15A  is a front of the TED mount according to the present invention in a forward position. 
           [0048]      FIG. 15B  is a side of the TED mount according to the present invention in a rearward forward position. 
           [0049]      FIG. 16  is a perspective view of a hanger element and equipment box of the TED mount according to the present invention. 
           [0050]      FIG. 17A  is a front view of the hanger element and the equipment box of the TED mount according to the present invention. 
           [0051]      FIG. 17B  is a side view of the hanger element and the equipment box of the TED mount according to the present invention. 
           [0052]      FIG. 18A  is a front view of the equipment box of the TED mount according to the present invention. 
           [0053]      FIG. 18B  is a side view of the equipment box of the TED mount according to the present invention. 
           [0054]      FIG. 18C  is a rear view of the equipment box of the TED mount according to the present invention. 
           [0055]      FIG. 18D  is a top view of the equipment box of the TED mount according to the present invention. 
           [0056]      FIG. 19A  is a front view of the carrier and pivot arms of the TED mount according to the present invention. 
           [0057]      FIG. 19B  is a side view of the carrier and pivot arms of the TED mount according to the present invention. 
           [0058]      FIG. 20  is a cross-sectional view of the pivot arms of the TED mount according to the present invention taken along line  20 - 20  of  FIG. 19B . 
           [0059]      FIG. 21A  is a front view of a carrier, the pivot arms, and the hanger of the TED mount according to the present invention. 
           [0060]      FIG. 21B  is a side view of the carrier, the pivot arms, and the hanger of the TED mount according to the present invention. 
           [0061]      FIG. 21C  is a top view of the carrier, the pivot arms, and the hanger of the TED mount according to the present invention. 
           [0062]      FIG. 22  is a cross-sectional view of the carrier, the pivot arms, and the hanger of the TED mount according to the present invention taken along line  22 - 22  of  FIG. 21A . 
           [0063]      FIG. 23  is a perspective view of the carrier, the equipment box, the front pivot arm, and a front arm pivot axle of the TED mount according to the present invention. 
           [0064]      FIG. 24A  is a front view of the carrier, the equipment box, the front pivot arm, and the front arm pivot axle of the TED mount according to the present invention. 
           [0065]      FIG. 24B  is a side view of the carrier, the equipment box, the front pivot arm, and the front arm pivot axle of the TED mount according to the present invention. 
           [0066]      FIG. 26A  is a front view of a display housing according to the present invention. 
           [0067]      FIG. 25  is a detailed view of an adjustable axle according to the present invention. 
           [0068]      FIG. 26B  is a side view of the display housing and pivot block according to the present invention. 
           [0069]      FIG. 26C  is a rear view of the display housing and pivot block according to the present invention. 
           [0070]      FIG. 26D  is a top view of the display housing and pivot block according to the present invention. 
       
    
    
       [0071]    Corresponding reference characters indicate corresponding components throughout the several views of the drawings. 
       DETAILED DESCRIPTION OF THE INVENTION 
       [0072]    The following description is of the best mode presently contemplated for carrying out the invention. This description is not to be taken in a limiting sense, but is made merely for the purpose of describing one or more preferred embodiments of the invention. The scope of the invention should be determined with reference to the claims. 
         [0073]    A perspective view of a slat wall  10  and two embodiments of controlled stress hangers  12  and  14  according to the present invention are shown in  FIG. 1 , and a cross-sectional view of the slatwall  10  and the controlled stress hanger  14  taken along line  2 - 2  of  FIG. 1  is shown in  FIG. 2 . The slatwall  10  includes a multiplicity of parallel vertically spaced apart slats  11 . Each slat  11  includes a vertical face  11   a  and a horizontal standoff  11   b . Open spaces  13  between consecutive slats  11  allow attachment of the controlled stress hangers  12  and  14  to the slat wall  10 . The controlled stress hangers  12  and  14  include outer and inner lips  16  and  18  respectively which sandwich the vertical faces  11   a  of the slats  11  to attach the controlled stress hangers  12  and  14  to the slatwall  10 . Such attachment does not create vertical clamping forces on the slats  11 , which when combined with the weight of accessories attached to the controlled stress hangers  12  and  14 , may damage the slats  11 . 
         [0074]    A separated cover  12   a  and clamping member  12   b  of the controlled stress hanger  12  are shown in  FIG. 3 , a front view of the controlled stress hanger  12  is shown in  FIG. 4A , and a rear view of the controlled stress hanger  12  is shown in  FIG. 4B . The biasing spring  22  is attached to the clamping member  12   b  and resides between the cover  12   a  and clamping member  12   b  biasing the cover  12   a  and clamping member  12   b  apart. The biasing spring  22  may also be attached to the cover  12   a . Such biasing separates the inner and outer lips  16  and  18  during positioning of the controlled stress hanger  12  on the slatwall  10 . The spring  22  may be a leaf spring, a coil spring, any compressible material which biases the cover  12   a  and clamping member  12   b  apart which may be compressed to allow sandwiching (or clamping) the vertical face  11  between the inner and outer lips  16  and  18  to attach the controlled stress hanger  12  to the slatwall. 
         [0075]    The cover  14   a  and clamping member  14   b  of the controlled stress hanger  14  are shown separated in  FIG. 5 , a front view of the controlled stress hanger  14  is shown in  FIG. 6A , and a rear view of the controlled stress hanger  14  is shown in  FIG. 6B . The cover  14   a  and clamping member  14   b  are attached by screws  20  or the like, and the screws  20  are tightened after the inner lips  18  are inserted between the slats  11  to attached the controlled stress hanger  14  to the slatwall  10 . The controlled stress hanger  14  is thus attached by sandwiching the vertical face  11   a , not by exerting vertical clamping force on vertically spaced apart slats  11 . 
         [0076]    A narrow version of the clamping section  12   b  is shown in  FIG. 7A , a wide version of the clamping section  12   b  is shown in  FIG. 7B , a short version of the clamping section  14   b  is shown in  FIG. 7C , and a tall version of the clamping section  14   b  is shown in  FIG. 7D . The narrow and short versions of the clamping section include a single spring  22 , and the wide and tall versions of the clamping section include two single springs  22 . 
         [0077]    A cover member  14   a  of the controlled stress hanger  14  having inward reaching vertical right and left outer lips  16  is shown in  FIG. 8A , a cover member  14   a  having the inward reaching vertical right and left outer lips  16  and an inward reaching bottom outer lip  16  is shown in  FIG. 8B , a cover member  14   a  having the inward reaching vertical right and left outer lips  16  and the inward reaching bottom outer lip  16  and an inward reaching top outer lip  16  is shown in  FIG. 8C , and a cover member  14   a  having the inward reaching vertical right and left outer lips  16  and outward reaching top and bottom outer lips  16  is shown in  FIG. 8D . The various configurations of outer lips are generally interchangeable, but some may be preferred in specific embodiments of the present invention. 
         [0078]    A clamping member  14   b  having notches  19  on opposite ends of top and bottom inner lips  18  is shown in  FIG. 9A , a clamping member  14   b  having notches  19  on opposite ends of the top inner lips  18  is shown in  FIG. 9B , and a clamping member  14   b  without notches  19  on opposite ends of the inner lips  18  is shown in  FIG. 9C . The notches  19  are provided to allow wider spacing of the screws  20  (see  FIGS. 5 ,  6 A, and  6 B). 
         [0079]    A perspective view of the spring member  22  for biasing the cover  12   a ,  14   a  and clamping members  12   b ,  14   b  apart is shown in  FIG. 10 , a front view of the spring member  22  is shown in  FIG. 11A , a side view of the spring member  22  is shown in  FIG. 11B , and a top view of the spring member  22  is shown in  FIG. 11C . 
         [0080]    A perspective view of a Touch Entry Device (TED) mount  30  according to the present invention in a rearward position is shown in  FIG. 12 , a front view of the TED mount  30  in a rearward position is shown in  FIG. 13A , and a side view of the TED mount  30  in a rearward position is shown in  FIG. 13B . The TED mount  30  includes five major elements, a hanger  36 , a carrier  38 , a equipment box  32 , a display housing  34 , and front and rear vertically pivoting arms  40   a  and  40   b  respectively. The equipment box  32  is attached to the hanger  36  by a first pivot block  50   a  and the display housing is attached to the carrier  36  by a second pivot block  50   b . Cables  52  are attached to the hanger  36 , front arm  40   a , and carrier  36  by clips  54 . The vertically pivoting arms  40   a  and  40   b  pivot on horizontal axles  60  (see  FIGS. 23 ,  24   a , and  25 ). 
         [0081]    The TED mount  30  is preferably mounted to the slatwall  10  using the clamping member  14 , but may be mounted to the slatwall  10  using any mounting, and may be mounted to other support structure, and a TED mount  30  mounted to any support using any mounting is intended to come within the scope of the present invention. 
         [0082]    A perspective view of the TED mount  30  according to the present invention in a forward position is shown in  FIG. 14 , a front of the TED mount  30  in a forward position is shown in  FIG. 15A , and a side of the TED mount  30  in a forward position is shown in  FIG. 15B . The vertically pivoting geometry of the pivot arms  40   a ,  40   b  allows the display housing  34  to be moved forward and rearward, with negligible vertical movement because the pivot arms  40   a ,  40   b  pivot between very small angles. Other mounts, such as a slide mount and a horizontally pivoting mount, were considered, but neither provides the strength or stability of the pivot arms  40   a ,  40   b . The arms  40   a ,  40   b  pivot through a vertical position moving from the rearward position in  FIG. 13B  to the forward position in  FIG. 15B . 
         [0083]    The hanger  36  includes a pair of stops  72   a  to limit the movement of the arms  40   a  and  40   b . The stops  72   a  preferably include rubber bumpers for contact with the arms  40   a  and  40   b . The carrier  38  similarly includes stops  72   b . A first pivot stop  70   a  resided in front of pivot block  50   a  to limit vertical movement of the equipment box  32  and a second pivot stop  70   b  resided above pivot block  50   b  to limit vertical movement of the display housing  34 . 
         [0084]    A perspective view of the hanger  36  and equipment box  32  of the TED mount  30  is shown in  FIG. 16 , a front view of the hanger  36  and equipment box  32  of the TED mount  30  is shown in  FIG. 17A , and a side view of the hanger  36  and equipment box  32  of the TED mount  30  is shown in  FIG. 17B . Front, side, rear, and top views of the equipment box  32  are shown in  FIGS. 18A-18D  respectively. The equipment box  32  is connected to the hanger  36  by the pivot block  50   a  providing both rotation (see  FIG. 18D ) and tilt (see  FIG. 18B ) of the equipment box  32 . A vertical axle of the pivot block  50   a  is composed of a threaded rod  62   v , a pair of plain bearings  64   v  and a pair of flange barrel nuts  66   v . The flange barrel nuts  66   v  provide axial bearings and the friction adjustments for the pivot block  50   a . Similarly, the horizontal axle of the pivot block  50   a  is composed of a threaded rod  62   h , a pair of plain bearings  64   h  and a pair of flange barrel nuts  66   h . The pivot block  50   b  has similar construction. Additional details of an adjustable axle according to the present invention are shown in  FIG. 25 . 
         [0085]    A front view of the carrier  36  and pivot arms  40   a  and  40   b  of the TED mount  30  is shown in  FIG. 19A , a side view of the carrier  36  and pivot arms  40   a  and  40   b  of the TED mount  30  is shown in  FIG. 19B , and a cross-sectional view of the carrier  36  and pivot arms  40   a  and  40   b  of the TED mount  30  taken along line  20 - 20  of  FIG. 19B  is shown in  FIG. 20 . The arms  40   a  and  40   b  are parallel and the arm  40   a  includes lips  42  overlapped by the arm  40   b  preventing material from entering the space between the arms  40   a  and  40   b.    
         [0086]    A front view of the carrier  38 , the pivot arms  40   a  and  40   b , and the hanger  36  of the TED mount  30  is shown in  FIG. 21A , a side view of the carrier  38 , the pivot arms  40   a  and  40   b , and the hanger  36  of the TED mount  30  is shown in  FIG. 21B , a top view of the carrier  38 , the pivot arms  40   a  and  40   b , and the hanger  36  of the TED mount  30  is shown in  FIG. 21C , and a cross-sectional view of the carrier  38 , the pivot arms  40   a  and  40   b , and the hanger  36  of the TED mount  30  taken along line  22 - 22  of  FIG. 21A  is shown in  FIG. 22 . Arcs  56  are cut into sides of the carrier  38  and hanger  36  on opposite side of axles (see  FIGS. 23 ,  24 A, and  24 B) to allow axle stays  44  to be adjusted to control motion of the TED mount  30 . 
         [0087]    A perspective view of the carrier  38 , the equipment box  32 , the front pivot arm  40   a , and a front arm pivot axle  48  of the TED mount  30  is shown in  FIG. 23 , a front view of the carrier  38 , the equipment box  32 , the front pivot arm  40   a , and a front arm axle  60  (see  FIG. 25 ) of the TED mount  30  is shown in  FIG. 24A , and a side view of the carrier  38 , the equipment box  32 , the front pivot arm  40   a , and the front arm axle  60  of the TED mount  30  is shown in  FIG. 24B . A more detailed view of an axle  60  according to the present invention is shown in  FIG. 25 . The axle  60  comprises a threaded rod  62 , a pair of plain bearings  64  and a pair of flange barrel nuts  66 . The flange barrel nuts  66  may be tightened or loosened on the threaded rod  62  to increase or decrease resistance of movement of the arms  40   a ,  40   b . For example, the flange barrel nuts  66  may be configured for a slot screwdriver, a phillips screw driver, and allen wrench, a square drive, or any tightening tool. The axles at the lower end of the arms  40   a  and  40   b , and in the pivot block  50   a ,  50   b  are preferably of similar design having the same function, only varying in dimensions. 
         [0088]    A front view of a display housing  34  is shown in  FIG. 26A , a side view of a display housing  34  is shown in  FIG. 26B , a rear view of a display housing  34  is shown in  FIG. 26C , and a top view of a display housing  34  is shown in  FIG. 26D . The display housing  34  is connected to the carrier  38  by the pivot block  50   b  allowing rotation (see  FIG. 2D ) and tilt (see  FIG. 26B ) of the equipment box  32 . 
         [0089]    While the invention herein disclosed has been described by means of specific embodiments and applications thereof, numerous modifications and variations could be made thereto by those skilled in the art without departing from the scope of the invention set forth in the claims.