in describing preferred embodiments of the present invention illustrated in the drawings , specific terminology is employed for the sake of clarity . however , the invention is not intended to be limited to the specific terminology so selected , and it is to be understood that each specific element includes all technical equivalents which operate in a similar manner to accomplish a similar purpose . for example , &# 34 ; top &# 34 ;, &# 34 ; bottom &# 34 ;, &# 34 ; left &# 34 ;, &# 34 ; right &# 34 ;, &# 34 ; above &# 34 ;, &# 34 ; below &# 34 ;, &# 34 ; upper &# 34 ;, &# 34 ; lower &# 34 ;, and so forth , are presented for ease of reference in describing a particular embodiment , and do not limit the scope of the invention in any way . a preferred embodiment of the display cabinet according to the present invention is shown in fig1 - 3 . the cabinet includes a front door 102 and left and right cabinet side panels 104 , 106 , respectively . door 102 and side panels 104 , 106 are vertically arranged to form an interior space in the shape of an equilateral triangular prism . the cabinet is situated between a base 108 ( fig1 ) and a top surface 320 ( fig3 ). a rectangular viewing window 110 is provided in door 102 . as shown most clearly in fig2 the &# 34 ; footprint &# 34 ; of the cabinet is triangular . in the interior of the cabinet , reflective glass or mirrors 202 , 204 are provided on inner surfaces of cabinet panels 104 , 106 , respectively . the third side of the interior of the cabinet comprises the inner surface of door 102 . the inner surface of glass viewing window 110 is covered by a semi - reflective coating , labelled 110 &# 39 ;. the window preferably constitutes a &# 34 ; half - mirror &# 34 ;. as used in the present specification , the term &# 34 ; half - mirror &# 34 ; means a surface which reflects only a portion of incident light but transmits the remainder of it . no implication is made by the term &# 34 ; half &# 34 ;- mirror or &# 34 ; semi &# 34 ;- reflective that exactly 50 % of the light is transmitted . in this arrangement , light in the interior of the cabinet may repeatedly reflect among reflective surfaces 202 , 204 , and 110 &# 39 ;. however , some of the light escapes through semi - reflective coating 110 , so that the interior of the cabinet can be viewed by an observer . the invention achieves some of its utility by design of the half - mirror &# 39 ; s properties , and through choice of interior and exterior light intensities . when the interior light is more intense than exterior light the outside observer cannot see his own image reflected by reflective surfaces 202 , 204 nor in viewing window 110 . in short , the observer does not see his own reflection when viewing the interior of the cabinet . referring now more specifically to fig3 the cabinet is shown to comprise a display chamber 302 disposed between an upper chamber 304 and a lower chamber 306 . an exemplary object 308 is shown placed in the display chamber 302 , multiple reflections 308 &# 39 ; of the object being shown in reflective surfaces 202 , 204 . the display chamber 302 is separated from the upper chamber 304 by an upper divider 310 . similarly , the display chamber 302 is separated from lower chamber 306 by a lower divider 312 . upper and lower dividers 310 , 312 are made from a material or are made in a form which transmits , and preferably also diffuses , light . in the illustrated embodiment , a top light source 314 and a bottom light source 316 are provided in respective upper and lower chambers 304 , 306 . preferably , dividers 310 , 312 are planar translucent material , serving to diffuse light from light sources 314 , 316 to surround object 308 with light so as to minimize harsh shadows . however , dividers 310 , 312 may also be designed as lenses or baffles . the dimensions of viewing window 110 are preferably maximized to allow one or more observers to view as much as possible of the display chamber 302 , as defined by the edges of the door 102 and the upper and lower dividers 310 , 312 . as illustrated in fig3 door 102 is rotatably affixed to the right side of the cabinet by hinges 318 . security for the cabinet may be provided by means of a conventional lock 106 centered beneath the viewing window 110 . lock 106 may selectively engage a conventional catch 320 centered on the bottom front edge of lower divider 312 . various features known to those skilled in the art have been omitted from the drawings for the sake of clarity . for example , it is well known to those skilled in the art that electrical wiring and electrical switches may be readily provided to supply power to top and bottom light sources 314 , 316 and to enable simultaneous , independent , or variable - brightness switching of top and bottom light sources 314 , 316 . the switches may advantageously be provided in lower chamber 306 , near the source of electrical power . wiring to provide power to the upper light source 314 may be routed behind reflective glass or mirror surfaces 202 , 204 . ventilation slots or holes may be provided in top surface 320 or on the back of the cabinet on cabinet panels 104 , 106 . such slots or holes may be provided in the front of door 102 , although this is generally thought to be less desirable for aesthetic reasons . further , it will readily be appreciated that lower chamber 306 may be used for storage purposes , perhaps for storing additional objects to complement object 308 . lock 106 provides the same level of security for objects in lower chamber 306 as for the displayed object 308 . it will further be readily appreciated that cabinet side panels 104 , 106 , as well as the cabinet front door 102 , may be made of any suitable material , such as wood , plastic , metal , particle board , or fiberboard . surfaces 202 , 204 may be mirrors or reflective glass . alternatively , surfaces 202 , 204 may be &# 34 ; one - way mirrors &# 34 ; allowing lights supplemental to 314 , 316 to be placed between surfaces 202 , 204 and cabinet panels 104 , 106 . in this alternative embodiment , a suitable chamber is provided between 202 and 104 , and / or between 204 and 106 . the reflective coating on the inside surface of viewing window 110 may be any suitable material which reflects some light and passes other light , such as &# 34 ; solarban &# 34 ; from ppg industries , inc . of 501 second avenue , ford city , pa . 16226 . the choice of reflective coating is made in conjunction with the choice of top and bottom light sources 314 , 316 . as appreciated by those skilled in the art , an observer outside the cabinet looking into the cabinet through viewing window 110 will readily see the object 308 and object &# 39 ; s reflection 308 &# 39 ; only if the light intensity inside the cabinet is greater than the ambient light level . thus , light sources 314 , 316 are generally bright lights , such as halogen &# 34 ; performance plus &# 34 ; from general electric company of nela park , cleveland , ohio 44112 . also , the viewing window 110 may be made of laminated , impact - resistant glass so as to protect the contents of the cabinet . the glass may even be made bullet - proof , if required . for still further security , the semi - reflective coating allows the object 308 to be hidden from view when the internal light sources 314 , 316 are turned off . in this case , the viewing window 110 appears to be a normal mirror , reflecting ambient light back to the viewer , and obscuring the interior of the cabinet . this obscuring of the cabinet interior tends to thwart attempts at theft or vandalism . the upper and lower dividers 310 , 312 may be made of a translucent material such as &# 34 ; prism panels &# 34 ; by artcrest products , inc . of 500 w . cermak road , chicago , ill . 60616 . alternatively , the dividers may be open louvers such as &# 34 ; parahex &# 34 ; by artcrest products , inc . of 500 w . cermak road , chicago , ill . 60616 . of course , many variations upon the illustrated embodiment may be practiced , while still remaining within the scope of the invention . for example , the three - sided configuration ( two reflective surfaces and one half - mirror ) may be replaced by a different number of reflective surfaces and a greater number of half - mirrors . these variations allow different optical effects to be experienced . similarly , the upper chamber 304 or the lower chamber 306 may be eliminated , or the internal lighting provided by only one of the light sources 314 or 316 . alternatively , one or both of the light sources , or one or both of the upper or lower chambers , may be eliminated altogether , and one or more light sources placed at the same height as the displayed objects , illuminating the objects through &# 34 ; one - way mirrors &# 34 ; as described above . the illustrated embodiment provides the advantage of saving floor space ; however , by eliminating upper and lower chambers 304 , 306 , and placing light sources horizontally across from the objects in a new side chamber ( not illustrated ), vertical space is conserved . further , the optical qualities of upper divider 310 and lower divider 312 may be other than those provided by a translucent plane . for example , one or the other divider may be opaque or totally reflective . in the preferred embodiment , the cabinet is 36 inches high , not including a 3 inch high base . front door 102 is 16 inches wide , supporting a viewing window which is 12 inches wide and 12 inches high . of course , variations on the structure , materials , orientation , and dimensions of the elements of the illustrated embodiment may readily be practiced by those skilled in the art , while still remaining within the scope of the invention . viewing window 110 occupies substantially all of one surface of display chamber 302 . because of the multiple reflections 308 &# 39 ; of object 308 , and because of the large size of viewing window 110 , an observer may view the object or its reflections from a wide variety of angles . this is in distinct contrast to the &# 34 ; peepholes &# 34 ; present in many amusement or display devices known in the art . as a further example of the advantages of the invention , the ability of observers to move their heads along a continuous path allows the &# 34 ; sparkle &# 34 ; of displayed jewelry to be fully appreciated . also , because of the large size of the viewing window , several people can view an object at once , a feature which is desirable in commercial or museum settings . further , the provision of upper and / or lower chambers 304 , 306 allows a variety of optional features to be implemented . for example , the object may be placed on a rotating platform , with the required rotational mechanism disposed within one of the upper or lower chambers . the present invention allows all of these advantages , while further providing a protected environment for objects 308 which may be of substantial value , such as jewelry , art work , or collectibles . of course , locking systems more secure than a simple key lock 106 lie within the contemplation of the invention . by virtue of the use of two or more reflective surfaces 202 , 204 in the cabinet , the apparent volume occupied by the display chamber is much larger than the actual volume it occupies . this provides the advantage of physical compactness , allowing minimal floor space to support a visually pleasing display . all of these advantages are provided in a cabinet in which the observer may view the object from any given number of angles , without having to see his own reflection . the cabinet according to the present invention may be used in a wide variety of environments . the cabinet is especially useful for museums , art galleries , showrooms of retail stores , and other public display areas . the cabinet is especially useful for showing jewelry or other valuable items such as art work or collectibles . the cabinet also has scientific uses , such as permitting photography of certain subjects from a variety of angles , including during use of time - lapse photography so that the object may simultaneously recorded from a variety of points in both time and space . as demonstrated above , modifications and variations of the above - described embodiments of the present invention are possible , as appreciated by those skilled in the art in light of the above teachings . it is therefore to be understood that , within the scope of the appended claims and their equivalents , the invention may be practiced otherwise than as specifically described .
the present invention provides a display cabinet for displaying an object from a plurality of views , in which the observer &# 39 ; s own image is not reflected . according to the present invention , at least one reflective surface such as mirrors are provided within a cabinet . the mirrors define an internal display chamber within the cabinet , with one of the faces of the display chamber constituting a viewing window having a special coating which allows some of the interior light to escape the display chamber . the lighting in the display chamber is controlled so as to ensure that more light exits the viewing window than enters from outside the display cabinet , thus ensuring that the observer &# 39 ; s image is not reflected .