Abstract:
A display system for wall or table use which incorporates multiple two-sided display panels that allow either face of the panels to be viewed and to lie parallel with adjacent panels when rotated 180 degrees from one side of the device to the other is disclosed. Suitable for home, office, or commercial use, the construction of the device presents a decorative appearance and provides for display of multiple images or small objects, or a combination of small objects and images. The construction of the device allows the device to be wall mounted or attached to a base and used as table display. The device can be economically configured for portrait or landscape orientation of popular sized displays. Using the same components, customized versions can be economically fabricated. A variety of materials can be used to construct the display system.

Description:
FIELD OF INVENTION  
       [0001]     This invention relates to systems for displaying multiple images or objects.  
       BACKGROUND  
       [0002]     Adequate wall space and/or table space for the display of photographs, images, and small objects is frequently lacking in many homes and offices. The same is true for commercial facilities where display space has an economic value. Decorative space-saving display devices compatible with a wide spectrum of decors that have multiple display faces, and that can house a wide range of image sizes are not readily available.  
       SUMMARY OF THE INVENTION  
       [0003]     The invention is a space-saving display system incorporating fixed-displays and multiple moveable two-sided display panels for use in viewing images or small objects.  
         [0004]     This invention relates to the display of objects retained in multiple two-sided display panels. These panels can be viewed in user selected facing pairs in which the front face of one display panel is visible at the same time as the back face of an adjacent display panel. The device can be mounted on a vertical surface with the display panels oriented for operation in a horizontal or vertical position; or be mounted on a baseplate that stands on a flat surface such as a table or counter, with the display panels oriented for operation in a horizontal direction.  
         [0005]     The principal object of this invention is to allow use of multiple display panels in a space slightly larger than that of one or at most two display panels, and to allow rotation of the nested display panels for sequential viewing of any two pairs of facing images/item sides of display panels. All the moveable display panels can be rotated away from stationary plane behind them (a backplane) for viewing and then nested in a stack of panels parallel to the backplane without compromise of the decorative value of the device. In a preferred embodiment the field of rotation is a 180-degree arc, but an arc greater than 180 degrees yet substantially close to 180 degrees is also disclosed.  
         [0006]     An additional object of this invention is to minimize the projection of the stack of display panels away from the mounted surface.  
         [0007]     A further object of the invention is to allow rotation of a display panel for viewing anywhere in a 180-degree or greater arc.  
         [0008]     A further object of the invention is to allow the rotation of the moveable display panels of a single fixed-display embodiment over an adjacent display such as an ordinary picture, without contact with the adjacent display.  
         [0009]     A further object of the invention is to allow changeability of the images or items retained in the display panels without disturbing the mounting of the display system.  
         [0010]     A further object of the invention is to allow fabrication with either non-detachable or detachable two-sided moveable display panels.  
         [0011]     A further object of the invention is to allow the number of display panels installed in a system to be easily changed.  
         [0012]     Other objects, features, and advantages of the invention will be apparent from the detailed description that follows the brief description of the drawings, when read with reference to the accompanying drawings. 
     
    
     BRIEF DESCRIPTION OF DRAWINGS  
       [0013]      FIG. 1  is a perspective view of a display system incorporating one fixed-display and four moveable display panels according to an embodiment of the present invention.  
         [0014]      FIG. 2  is a perspective view of a display system incorporating two fixed-displays and four moveable display panels according to an alternative embodiment of the present invention.  
         [0015]      FIG. 3  is a perspective view of a pivot block/pivot arm.  
         [0016]      FIG. 4  is a front view of a U shaped retention structure.  
         [0017]      FIG. 5  is a cross sectional view of a retention rail taken along the line A-A in  FIG. 4 .  
         [0018]      FIG. 6  is a cross sectional view of a retention bar taken along the line B-B in  FIG. 4 .  
         [0019]      FIG. 7  is an end view of the U Shaped retention structure shown in  FIG. 4 , from a point of view looking toward an axis of rotation of the U Shaped retention structure.  
         [0020]      FIG. 8  is an end view of the U Shaped retention structure installed in a middle-position, from a point of view looking toward an axis of rotation of the U Shaped retention structure.  
         [0021]      FIG. 9  is a perspective view of a pivot pin and pivot pin retention screw according to one embodiment of the present invention.  
         [0022]      FIG. 10  is a front view of a U shaped retention structure prepared for installation in a middle-position.  
         [0023]      FIG. 11  is an end view of a U shaped retention structure prepared for installation in a first-offset-position, taken from a point of view looking toward an axis of rotation of the U Shaped retention structure.  
         [0024]      FIG. 12  is a front view of a U shaped retention structure prepared for installation in a first-offset-position.  
         [0025]      FIG. 13  is front view of a single fixed-display backplane assembly.  
         [0026]      FIG. 14  is a side view of a backplane assembly.  
         [0027]      FIG. 15  is a front view of a two fixed-display backplane assembly.  
         [0028]      FIG. 16  is a front view of a pair of middle-position display panel retention structures mounted on a single fixed-display backplane assembly with one middle-position display panel retention structure rotated approximately 180 degrees from the other middle-position display panel retention structure.  
         [0029]      FIG. 17  is a front view of a pair of first-offset-position display panel retention structures and a pair of middle-position display panel retention structures mounted on a single fixed-display backplane assembly with one first-offset-position display panel retention structure rotated approximately 180 degrees from the other first-offset-position display panel retention structure.  
         [0030]      FIG. 18  is a side view of a two-sided display pack used for the two-sided moveable display panels, showing the internal structure of the two-sided display pack.  
         [0031]      FIG. 19  is a front view of a middle-position display panel showing the installation of a removable display retention bar in the middle-position display panel.  
         [0032]      FIG. 20  is a side view of a single-sided display pack used for a fixed-display, showing the internal structure of the single-sided display pack.  
         [0033]      FIG. 21  is a front view of a fixed-display showing the installation of a single-sided display pack in the fixed-display.  
         [0034]      FIG. 22  is a front view of a first-offset-position display panel showing the installation of a two-sided display pack in the first-offset-position display panel.  
         [0035]      FIG. 23  is a perspective view of a baseplate according to an alternative embodiment of the invention.  
         [0036]      FIG. 24  is a top view of the device showing a pair of middle-position display panels and a pair of first-offset-position display panels, wherein all panels are nested substantially parallel to the backplane assembly, with dashed lines indicating approximately 180 degrees of movement for a middle-position display panel and a first-offset-position display panel.  
         [0037]      FIG. 25  is a cut away side view of the stable support system, showing among other things, the side of two display panels closest to the axis of rotation of the two display panels.  
         [0038]      FIG. 26  is a fragmentary plan view of a pair of middle-position display panels, and a pair of first-offset display panels, mounted on a pivot block, with dashed lines showing the position of a middle-position moveable two-sided display panel after being rotated approximately 180 degrees.  
         [0039]      FIG. 27  is a side view of a middle-position display panel adjacent to a first-offset-position display panel.  
         [0040]      FIG. 28  is a perspective view of a display system incorporating two fixed-displays and six moveable display panels, according to an alternative embodiment of the present invention.  
         [0041]      FIG. 29  is a perspective view of a pivot block/pivot arm assembly configured to support six moveable display panels, according to an alternative embodiment of the present invention.  
         [0042]      FIG. 30  is a left side view of a second-offset-position display panel retention structure.  
         [0043]      FIG. 31  is a front view of a second-offset-position display panel retention structure.  
         [0044]      FIG. 32  is a left side view of a display system having six moveable display panels according to an alternative embodiment of the invention.  
         [0045]      FIG. 33  is a perspective view of a pivot assembly configured to support eight moveable display panels.  
         [0046]      FIG. 34  is a left side view of a display system having eight moveable two-sided display panels.  
         [0047]      FIG. 35  is a left side view of a display system having ten moveable two-sided display panels.  
         [0048]      FIG. 36  is a perspective view of a display system having a narrow backplane assembly and four moveable two-sided display panels.  
         [0049]      FIG. 37  is a perspective view of a middle-position bracket pivot arm incorporated into a middle-position pivot arm bracket.  
         [0050]      FIG. 38  is a perspective view of first-offset-position bracket pivot arm incorporated into a first-offset-position pivot arm bracket.  
         [0051]      FIG. 39  is a perspective view of a narrow backplane assembly with four pivot arm brackets.  
         [0052]      FIG. 40  is a front view of a detachable moveable display panel, with arrows indicating direction for assembly.  
         [0053]      FIG. 41  is a left side view of a display panel installed on a mounting bracket, showing a pivot arm in a pivot bracket.  
         [0054]      FIG. 42  is a perspective view of a display system having two backplane extensions.  
         [0055]      FIG. 43  is a front view of a backplane extension with a single fixed-display and quick connect fasteners.  
         [0056]      FIG. 44  is a perspective view of a display system having a narrow backplane assembly and four theft-resistant detachable moveable display panels.  
         [0057]      FIG. 45  is a front view of a theft-resistant detachable moveable display panel, with arrows indicating direction for assembly.  
         [0058]      FIG. 46  is a top view of a slotted backbone of a theft-resistant moveable display panel, according to an alternative embodiment of the invention. 
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0059]     The description of the invention is divided into three sections, a physical description section describing the components of the display system, a functional description section describing the concepts underlying the invention and the invention in operation, and an other embodiments section describing other embodiments of the invention having more than four moveable panels.  
         [0060]     Because the moveable panels and U shaped retention structures in this invention are two-sided and the side facing away from the backplane of the invention varies with the configuration of the invention, defining the left and right side of these moveable parts is helpful. See  FIGS. 1 and 24 . Referring to  FIG. 1 , the “left” side of a moveable panel or U shaped retention structure is the side of the structure parallel to and nearest the axis of rotation of the structure. The “right” side of the structure is the side parallel to and farthest away from the axis of rotation of the structure. The words “top” and “bottom” are defined with respect to the image associated with their usage.  
         [0061]     For purposes of this patent, “nested” or “nesting together” refers to multiple moveable display panels being substantially parallel to one another, wherein the front of one display panel is adjacent the back of the next display panel, such as the panels defined by solid lines in  FIG. 24 .  
         [0000]     Physical Description  
         [0062]     A single fixed-display embodiment of the invention, ready for wall mounting, is shown in  FIG. 1 . The device shown in  FIG. 1  comprises a single fixed-display backplane assembly  23 , which incorporates one fixed-display  26  further comprising one viewable face, two pivot blocks  9 , two middle-position display panels  21  wherein each middle-position display panel  21  comprises two viewable faces, and two first-offset-position display panels  22  wherein each first-offset-position display panel  22  also comprises two viewable faces. A very similar embodiment is shown in  FIG. 2 , and comprises a two fixed-display backplane assembly  24  with two fixed-displays  26  incorporated therein.  
         [0063]     Referring now to  FIG. 24 , the display panels are in a preferred embodiment installed in pairs. A middle-position display panel  21  is installed in each of the two middle-positions in the center of pivot block  9 . The first step away from the middle-position of the pivot block  9  is the first-offset-position, to which a first-offset-position display panel  22  is installed. In alternative embodiments, this nomenclature continues, and the next step away from the center position of the pivot block  9  is the second-offset-position to which a second-offset-position display panel  34  is installed. See  FIG. 28 . The next step down and away from the center position is the third-offset-position, and so on.  
         [0064]     The invention comprises at least two versions of moveable two-sided display panels. The first version is intended for installation on either of two middle-position mounting bosses  30  (see  FIG. 3 ) of the pivot blocks  9  of either backplane assembly  23  or  24 , and is identified as a middle-position display panel  21 . See  FIG. 24 . The second version is intended for installation on either of the two first-offset-position mounting bosses  31  (see  FIG. 3 ), and is identified as a first-offset-position display panel  22 . See  FIG. 24 . Display panels  21  and  22  differ from each other in that a short pivot arm  4  is used for the middle-position display panel  21  and a long pivot arm  7  is used for the first-offset-position display panel  22 . See  FIGS. 3, 8 , and  11 .  
         [0065]     Display panels  21  and  22  are connected to the backplane assembly with a displacement rotation system (discussed infra) that incorporates two identical pivot blocks  9 . See  FIG. 3 .  
         [0066]     As shown in  FIG. 4 , two retention rails  1 , channeled as shown in  FIG. 5 , are attached to a retention bar  2 , channeled as shown in  FIG. 6 , to form a U shaped retention structure  3 . An end view of the U shaped retention structure  3  is shown in  FIG. 7 . The length of the components of the U shaped retention structure  3  is determined by its intended use as part of a portrait-oriented or landscape-oriented moveable two-sided display. Thus, the U shaped retention structures  3  may exist in a variety of shapes.  FIG. 4  shows a portrait-oriented U shaped retention structure  3  wherein the top and bottom retention rails  1  are shorter than the retention bar  2  on the side of the U shaped retention structure  3 . In a landscape-oriented version, the lengths are in general reversed and the top and bottom retention rails  1  are longer than the retention bar  2 .  
         [0067]     The short pivot arm  4  used for the middle-position display panel  21  is shown in  FIG. 3  and a side view of a middle-position retention structure  13  is shown in  FIG. 8 . In this embodiment, two short pivot arms  4  are attached to the U shaped retention structure  3  with the short pivot arms  4  installed perpendicular to the front of the unit to create the middle-position display panel retention structure  13  which holds the middle-position display panel  21 . See  FIGS. 8, 16  and  17 . A front view of the middle-position retention structure  13  is shown in  FIG. 10 .  
         [0068]     The length of the pivot arms must correspond to the intended location of the moveable display panel. In the embodiments shown in  FIGS. 1 and 2 , a long pivot arm  7  is used for the first-offset-position display  22 . See  FIGS. 1-3 . Two long pivot arms  7  are attached to the U shaped retention structure  3  with first-offset-position spacers  8  between the ends of the U shaped retention structure  3  and the pivot arms  7 , with the pivot arms  7  installed perpendicular to the front of the unit to create a first-offset-position display panel retention structure  14  ( FIGS. 11, 12  and  17 ). The first-offset-position display panel retention structure  14  holds a first-offset-position display panel  22 . See  FIGS. 2 and 17 . A front view of the first-offset-position display panel retention structure  14  for a first-offset-position display panel is shown in  FIG. 12 .  
         [0069]     In the embodiment shown in  FIG. 1 , two pivot blocks  9  and a fixed-display retention structure  11  are mounted on single fixed-display system backplate  10  to form the single fixed-display backplane assembly  23 . See  FIGS. 13-14 . A side view of the single fixed-display backplane assembly  23  is shown in  FIG. 14 .  
         [0070]     The two-fixed-display backplane assembly is shown in  FIG. 2 , and further detail is shown in  FIG. 15 . The pivot blocks  9  are mounted in the middle of the two fixed-display backplane assembly  24 . See  FIG. 15 .  
         [0071]     In the embodiments shown in  FIGS. 1 and 2 , two middle-position display panel retention structures  13  are mounted on the middle bosses  30  of the pivot blocks  9  and are fastened with pivot pins  5  and pivot pin retention screws  6 . In the embodiments shown in  FIGS. 36 and 44  (described infra), different pivot pins are used.  
         [0072]     In the embodiment shown in  FIGS. 1 and 2 , two first-offset-position display panel retention structures  14  are mounted on the first-offset-position mounting bosses  31  of the pivot block  9 . See  FIGS. 1, 3 ,  9 , and  17 . In the embodiment shown in  FIG. 1 , a single fixed-display backplane assembly  23  is used, and in the embodiment shown in  FIG. 2 , a two fixed-display backplane assembly  24  is used. See  FIGS. 1 and 2 . In either case, the first-offset-position display panel retention structures  14  are fastened to the first-offset-position mounting bosses  31  with pivot pins  5  and pivot pin retention screws  6 . See FIGS.  1 ,  3 , 9  and  17 .  
         [0073]      FIG. 18  is a side view of a typical two-sided display pack  19  comprising two transparent covers  15 , two mats  16 , two image sheets  17  that may contain one or more images, and a lightweight stiffener  18 . See  FIG. 18 . The two-sided display packs  19  are interchangeable for all moveable display panels  21 ,  22 ,  48 , and  57 .  
         [0074]      FIG. 18  shows the display pack  19  inserted into the middle-position display panel retention structure  13  and held in place by a removable display retention bar  20 . Removable display retention bar  20  provides access to the U shaped retention structure 3 channels and secures the two-sided display pack  19  when it is installed in a moveable display assembly. In one embodiment, two screws may pass through pre-drilled holes in the retention rails  1  into the ends of the removable retention bar  20  to secure the retention bar  20  to a moveable display panel. The completed assembly is a middle-position display panel  21 . See  FIG. 19 . The same procedure is used to create the first-offset-position display panel  22  but uses the first-offset-position display panel retention structure  14 . See  FIG. 22 . A similar procedure but using the fixed display retention bar  27  is shown in  FIG. 21 . After assembly, the moveable two-sided display panels may be modified by the addition of a mounting slot for use in the embodiment shown in  FIG. 36  (discussed infra).  
         [0075]     A single-sided display pack  25  for a fixed-display  26  is shown in  FIG. 20  and comprises a transparent cover  15 , mat  16 , and an image sheet  17  that may contain one or more images. The single-side display pack  25  is inserted into channels on the fixed-display retention structure  11  and held in place by a removable display retention bar  20 . See  FIGS. 13, 15 , and  21 . In the embodiments shown in  FIGS. 1, 2 , and  36 , all retention rails  1  and retention bars  2  and  20  contain the same size channels.  
         [0076]     In a preferred embodiment, the entire device may be wall mounted using predrilled holes in the backplate.  
         [0077]     In addition to being used as a wall-mounted device, the invention may be used as a table-mounted device with the baseplate  28  installed using holes predrilled in the either a single fixed-display system backplate  10  or a two fixed-display system backplate  12 . See  FIGS. 1, 2 , and  23 . The position of the alignment pins  29  installed in the baseplate  28  is shown in  FIG. 23 . In the embodiments shown in  FIG. 36  and  FIG. 44 , the optional baseplate  28 , and at least one backplane extension  49  are required for table-mounted operation. In the embodiment shown in  FIG. 42 , two backplane extensions are disclosed. Extension backplane fasteners  65  may fasten the backplane extension  49  to the narrow backplate  47 , as shown in  FIGS. 42 and 43 . In a preferred embodiment, the display system is sufficiently rugged to allow its use for non-permanent displays after transport to a desired location.  
         [0078]     In a preferred embodiment, the device may be constructed from wood, metal and plastic, but those materials are presented for purposes of illustration and not of limitation.  
         [0000]     Displacement Rotation System  
         [0079]     In a preferred embodiment, two identical pivot blocks  9  and their associated pivot arms  4  and  7  are integrated into each display system to create a displacement rotation system. See  FIG. 3 . In an alternative embodiment explained later in detail, the displacement rotation system comprises pivot blocks and pivot arm brackets. See  FIGS. 36 and 44 .  
         [0080]     For the embodiments shown in  FIG. 1  and  FIG. 2 , the intended mounting position on the mounting bosses  30 ,  31 ,  32  of the pivot block  9  determines what components have to be added to the basic retention structure  3 . In these embodiments, the moveable display panels are identified by their mounting position on the pivot block  9 . That is, in a display system equipped with four moveable display panels  21  and  22  as shown in  FIG. 1  and  FIG. 2 , pivot blocks  9  comprise two short pivot arms  4  on the middle-position mounting bosses  30  and two long pivot arms  7  for moveable display panels mounted on the first-offset-positions mounting bosses  31 . The pivot arms  4  and  7  are attached to the basic retention structures  3  to construct the middle-position display panels  21  and first-offset-position display panels  22 . For the embodiments shown in  FIG. 36  and  FIG. 44 , the pivot arm brackets are specific to each mounting position and the detachable moveable display panels are identical and interchangeable.  
         [0081]     The displacement rotation system has three functions, which will be described in turn. First, it provides stable support for the moveable display panels both at rest and at any point in the field of rotation. Second, it provides nesting of stacks of moveable two-sided display panels anywhere in the field of rotation. Third, it provides interference-free approximately 180-degree rotation of the moveable two-sided display panels.  
         [0082]     The displacement rotation system achieves this stable support of moveable display panels by attaching a pair of pivot arms to the top and bottom of the moveable two-sided display panels  21 ,  22 ,  48 , or  57 . As shown in  FIG. 25 , the short pivot arms  4  of middle-position display panel  21  are pinned to pivot blocks  9 , which in turn are attached a backplane assembly  23 ,  24  or  56 . See  FIGS. 24 and 44 . Note, somedetails (fixed-display, pivot pins) have been omitted from  FIG. 25  for clarity of presentation.  FIG. 27  illustrates the height difference of short pivot arm  4  and long pivot arm  7 .  
         [0083]     The nesting of moveable display panels requires a simultaneous rotation and displacement of the display panels.  FIG. 25  shows the connection of the pivot arms  4  and  7  to the pivot blocks  9 .  FIG. 26  is a top view of four moveable display panels  21  and  22 , and does not show the upper portion of the display panels and backplane assembly. All the pivot pins of the display panels  21 ,  22  are spaced on a line parallel to the single fixed-display system backplate  10 . See  FIG. 26 . When a middle-position display panel  21  is deviates from the position shown in  FIG. 26 , the pivot arm displaces the display panel a distance equal to the width of middle-position display panel  21  plus the distance from the face of the display to the center of the pivot pin. This provides sufficient clearance to allow the middle-position display panel  21  to be rotated to a position parallel the other middle display panel  21 . The first-offset-position display panel  22 , shown adjacent to the single fixed-display backplate  10  may be rotated and stacked in a similar manner. See  FIG. 26 .  FIG. 27  illustrates the difference in the length of pivot arms  4  and  7  of the middle display panel  21  and the first-offset-position display panel  22 . This difference in pivot arm length is sufficient to allow the first-offset-position display panel  22  to be rotated and stacked parallel to the middle-position display panel  21 .  
         [0084]     With regard to the elimination of interferences, there are two sources of interference during rotation of a moveable display panel. The first is the degree of clearance between the back of one panel and the front of the adjacent nested panel. For example, when a nested moveable middle display panel  21  is rotated, the back edge of the panel swings in an arc set by the length of short pivot arm  4 . See  FIG. 26 . The length of the long pivot arm  7  as shown in  FIG. 27  includes the increment of length required to create the necessary clearances of nested panels during rotation.  
         [0085]     The second source of interference is when adjacent pivot arms are mounted in the same plane of motion. To avoid this problem, the pivot block  9  is equipped with mounting bosses  30 ,  31 ,  32  at different heights. See  FIGS. 3 and 29 . The basic U shaped retention structures  3  used to construct the moveable display panels are the same size. As shown in  FIG. 29 , to match with the height differences of the mounting bosses  30 ,  31 , and  32  on the pivot block  9 , first-offset-position spacer  8  is with the longer pivot arm  7 . See  FIGS. 11, 12 , and  29 . This creates a span difference between the pivot arms of the middle-position display panel  21  and the first-offset-position display panel  22  and allows free rotation of either display panel. This allows adjacent moveable two-sided display panels can be moved together while remaining nested. Note that spacers are not required in the embodiment of the invention employing bracket pivot arms (discussed infra).  
         [0000]     Functional Description  
         [0086]     The present invention has a footprint substantially equal to that amount of space required for one conventional fixed-display, or, in the embodiment shown in  FIG. 2 , substantially equal to that space required for two conventional fixed-displays.  
         [0087]     One objective of the invention is to provide a decorative wall-mounted display system that will allow sequential viewing of a set of multiple images such as photographs, drawings, and other illustrations in the wall space normally required for one image, with the images mounted in a set of moveable two-sided display panels that can be stacked flat against the wall or backplane assembly. See  FIGS. 1, 2 , and  24 .  
         [0088]     In operation, the moveable two-sided display panels may freely rotate through an arc of 180 degrees about an axis of rotation, stay in a position selected by the viewer, and store flat against the wall or backplane assembly  23  or  24 . See  FIGS. 24 and 26 . As shown supra, the displacement rotation system accomplishes this by displacing the moveable two-sided display panels an appropriate distance during rotation to allow a pair of panels to lie substantially flat against each other anywhere in the field of rotation. In  FIG. 24 a  set of four moveable display panels  21  and  22  are shown stacked flat against the backplane assembly  23 .  FIG. 24  also shows with dashed lines the position of the two outermost moveable display panels  21 ,  22  after rotation through a 180-degree arc.  
       Other Embodiments of the Invention  
       [0089]     In an alternative embodiment of the invention, the device comprises four detachable moveable display panels  48  as shown in  FIG. 36 . This embodiment differs from that shown in  FIGS. 1 and 2  in four ways. First, the middle-position bracket arms  52  (compare to short pivot arm  4 ) are incorporated into the middle-position pivot arm bracket  50 . See  FIGS. 3 and 37 . Second, the first-offset-position bracket pivot arms (compare to long pivot arm  7 )  53  are incorporated into the first-offset-position pivot arm bracket  51 . See  FIGS. 3 and 38 . Third, the display panels in this embodiment are detachable moveable display panels  48  and can be readily detached from the device. Finally, a narrow backplate  47  is used. See  FIGS. 36 and 39 . The device shown in  FIG. 36  comprises a narrow backplane assembly  47 , a middle-position pivot arm bracket  50  fastened to the pivot blocks  9  with fixed pivot pins  54 , and a first-offset-position pivot arm bracket  51 , also fastened to the pivot blocks  9 . The function of the pivot arm brackets  50  and  51  and pivot block  9  combination is the same as that of the separate pivot arms  4  and  7  and pivot block  9  combination. See  FIGS. 3 and 39 . The detachable moveable display panel  48 , shown in  FIGS. 40-41 , incorporates a mounting slot  55  on the closed side of the U shaped retention structure  3 , as shown in  FIG. 41 . Mounting slot  55  mates with the vertical portion of the pivot arm bracket and the two are fastened together in a non-permanent fashion. See  FIG. 41 . Thus, using slot-mounted pivot arm brackets that incorporate the pivot arms, the embodiments shown in  FIGS. 36 and 44  stand in contrast to the separate pivot arms of the embodiments shown in  FIG. 1  and  FIG. 2 . The pivot arm brackets  50  and  51  in the embodiments shown in  FIGS. 36 and 44  are part of the narrow backplane assembly.  
         [0090]     The two-sided display pack  19  can be removed and replaced whether the device is wall mounted or laying on a work surface. In either case, access to the two-sided display pack  19  is gained by removing the moveable display retention bar  20  from the device, as shown in  FIG. 40 . In the embodiment shown in  FIG. 36 , the detachable moveable display panels  48  are identical and interchangeable. Extension panels  64  that may incorporate a fixed-display retention structure  11  can be fastened on either or both sides of the narrow backplane assembly  56 . See  FIGS. 42-44 . In the configuration shown in  FIG. 42 , two backplane extension panels  49  are attached to the narrow backplate  47 .  
         [0091]     Finally, the embodiments shown in  FIGS. 36 and 42  allow the use of identical detachable moveable display panels for all positions and do not require spacers for the offset-positions. See  FIGS. 11, 12 ,  36 , and  42 .  
         [0092]     An additional embodiment of the invention is shown in  FIG. 44 . This embodiment comprises a narrow backplane assembly  56  and four identical theft-resistant display panels  57 . See  FIG. 44 . The theft-resistant display panels  57  are shown in detail in  FIG. 45 . Access to the two-sided display packs  19  is blocked when the theft resistant display panels  57  are installed on the narrow backplane assembly  47 . See  FIGS. 44-45 . As shown in  FIG. 45 , the theft-resistant display panel  57  must be uninstalled to allow access to display pack access fasteners  60  that attach a theft resistant U shaped retention structure  58  to a slotted backbone  59 , but to allow access a lock device  61  must first be defeated. The slotted backbone  59  comprises a backbone-mounting slot  62  as shown in  FIG. 46 . Threaded tabs  63  may be used to secure the theft resistant U shaped retention structure  58  to the slotted backbone  59 . See  FIG. 46 . The pivot arm brackets  50  and  51  are mounted in the backbone mounting slots  62  in the slotted backbone  59  of the theft resistant display panel  57  and are fastened in place in a manner similar to that shown in  FIG. 41 . In one embodiment the lock device  61  is a typical lock requiring a key to open. See  FIG. 45 .  
         [0093]     An alternative embodiment of the invention comprising six moveable display panels  21 ,  22 ,  34  is shown in  FIG. 28 . A six-display pivot block  44 , with short pivot arms  4 , long pivot arms  7 , and second-offset-position pivot arms  33 , and a pivot block spacer  35  is shown in  FIGS. 28 and 29 . The pivot block spacer  35  allows the second-offset-position pivot arm  33  to be used for the second-offset-position display panel  34 . See Id. The system functions similarly to the systems shown in  FIGS. 1 and 2 , but with six moveable displays instead of four.  FIG. 30  shows a U shaped retention structure  3 , a second-offset-position pivot arm  37  and a second-offset-position pivot spacer  40 . Displays mounted on the second-offset-position mounting bosses  32  are shown in  FIGS. 30 and 31 .  
         [0094]      FIG. 33  shows an eight-display pivot block  39  with four sets of mounting bosses  30 ,  31 ,  32 , and  36 , and is required in an embodiment comprising eight moveable display panels  21 ,  22 ,  34 ,  42 . See  FIGS. 33-34 . This embodiment is similar to those previously described, and further comprises two third-offset-position display panels  38 , mounted on the third-offset-position mounting bosses  36 . See  FIGS. 33-34 .  FIG. 34  shows a side view of this embodiment.  
         [0095]     A ten-display pivot block  41  with five pairs of mounting bosses is required for an embodiment two middle-position display panels  21 , two first-offset-position display panels  22 , two second-offset display panels  34 , two third-offset-position display panels  38 , and two fourth-offset-position display panels  42 , as shown in  FIG. 35 .  
         [0096]     For other embodiments of the invention, the size and number of pivot block mounting bosses may be customized to support the number of moveable two-sided display panels to be included in a system. As the number of moveable two-sided display panels incorporated into the device increases, the length of the pivot arm increases for each offset-position. Additionally, the embodiment containing six, eight, and ten moveable display panels may also comprise the pivot arm brackets described supra.  
         [0097]     By reference to the descriptions above, it is evident that other embodiments can be constructed using the principles underlying the pivot block/pivot arm assemblies described herein. Thus, one skilled in the art will appreciate that the present invention can be practiced by other than the preferred embodiments, which are presented for purposes of illustration and not of limitation.