Patent Publication Number: US-5632419-A

Title: Snowfall simulator with agitating dispenser

Description:
BACKGROUND--FIELD OF THE INVENTION 
     This invention relates to decorative seasonal merchandise, specifically to a way of creating the effect of gentle falling snow over a small imitation village, Christmas tree or display. 
     BACKGROUND--DESCRIPTION OF PRIOR ART 
     The desire to produce the soothing, wintry effect of gentle falling snow as part of the decorating scheme for small store-bought or home-made villages and towns, or Christmas trees, has been around for a while. Some have thought the only way this is possible is to make an enclosure and blow the snow around with a fan as seen in U.S. Pat. No. 1,101,422, Fielding, Jul. 18, 1913. Others use devices that eject large quantities of artificial snow out from a central location downward into a large catch basin and with a suction or drive device recirculates the snow hack to the exit hole as seen in U.S. Pat. No. 4,028,830 to Ottinger, Jun. 14, 1977 and U.S. Pat. No. 5,098,084 to Culver, Mar. 24, 1992. In U.S. Pat. No. 3,999,750 to Perkins, December 1975, a pressurized holding tank ejects artificial snow from nozzles above a display. Such devices hinder the desire for realistic, gentle falling snow while at the same time being visually obstrusive. Furthermore, most inventors thought that the snow had to be collected immediately and automatically off the ground in order to make it practical and to produce the effect for an indefinite period of time. Therefore, they failed to consider that both practicality and length of effect can be attained by other means. 
     OBJECTS AND ADVANTAGES 
     It is therefore an object of this invention to create a gentle, uniform artificial snowfall for mainly in-home use which: 
     (a) collects naturally on the display&#39;s terrain, and 
     (b) falls from a broad area over the display, and 
     (c) falls in a visually pleasing way, and 
     (d) lasts for several hours. 
     Another object of this invention is utilizing artificial snow that resembles real snow: flattened and flake-like, uneven in size, and has a very slow rate of fall. 
     Further objects and advantages will become apparent from a consideration of the drawings and ensuing description. 
    
    
     DRAWING FIGURES 
     FIG. 1 shows a perspective view with plate 24 exploded above and the sides of the front corner cut away. 
     FIG. 2A and FIG. 2B shows two side views illustrating the linear motion of plate 24. 
    
    
     REFERENCE NUMERALS IN DRAWINGS 
     
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        12 battery pack                                                   
        14 motor                                                          
        16 planetary gear and ball joint                                  
        18 shaft                                                          
        20 base housing                                                   
        24 agitation plate                                                
        26 ceiling mount holes                                            
        28 bracket sleeves                                                
        32 exit holes                                                     
        36 shaft hole                                                     
        38 plastic riser                                                  
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     DESCRIPTION--FIGS. 1 &amp; 2 
     FIG. 1 shows a basic version of this invention. The base dispensing unit, box, or housing 20 consists of uniformly spaced openings or exit holes 32 on its bottom horizontal plane. Base 20 is made preferably of lightweight plastic one sixteenth to one eighth inch in thickness on all sides. The front and back sides have small holes at the upper comers for optional suspended ceiling mount using single strand wire or monofiliment line (not shown). Sleeves 28 attached on the underside of base 20 allow for stable mounting with a conventional rod-type wall bracket (not shown). A reticulated agitation plate or rigid mesh 24 is made approximately one half to one inch shorter than the inside length of base 20 and one sixteenth to one quarter inch narrower than the width. Plate 24 is slightly elevated off the bottom of base unit 20 with hollow, straw-like plastic risers 38 positioned at intervals along the edge sufficient to maintain support. A motor 14 powered by a battery pack 12 is mounted at one end of base unit 20. A planetary gear and ball 16 is attached to the shaft of motor 14. A shaft or crank am 18 is attached to planetary gear and ball 16 by coupling and, inserted through hole 36, is connected to plate 24 by nut and bolt or other suitable connection. 
     The preferred type of snow for this invention is shaved polystyrene. Any mass of fine particles which when falling has characteristics of snow can be used in this invention, but it is not preferred. For example, Polystyrene that is simply pulverized into minute pellets would agitate out of housing 20 and fall on the display but it still lacks other snow-like qualities thereby lessening the impact on the mind&#39;s eye. However, polystyrene which is shaved from a polystyrene block using a carpenter&#39;s block plane type shaver or autobody shaver, for instance, produces flattened flakes of various proportions which are less aerodynamic than pellets producing a realistic locking snow and a slower, wave-like, natural rate of fall. 
     OPERATION--FIGS. 1 &amp; 2 
     The goal driving this invention is, as stated: to produce a natural, slow, uniform covering of realistic snowfall. This can be achieved best by suspending the snow from above the display, as real snow is in clouds and, with the help of gravity, agitate the collection of snow over openings small enough that without agitation would not fall freely. This is what my invention accomplishes. The base unit 20 provides the housing and openings 32 for the snow. Referring now to FIG. 2, plate 24 is moved horizontally back and forth by converting the rotational energy or motion of motor 14 into linear motion by properly connecting planetary gear and ball 16, by coupling and shaft to plate 24. Plate 24makes one revolution, from position &#34;A&#34; to position &#34;B&#34; and back to &#34;A,&#34; in approximately 2 to 4 seconds, faster if more snowfall is desired. The slight elevation of plate 24 with risers 38 accomplishes two things: it creates less friction on the surface of base 20 putting less strain on motor 14 and, secondly, works to trap the snow between plate 24 and the bottom of base 20 forcing the snow out the exit holes 32. Static electricity in the polystyrene shavings, while visibly present, can be more of a help than a hindrance. While the static effect does cause the snow to cling to the surface or passageways, it does not permanently obstruct the openings during operation. If a hole is clogged with snow particles the continued agitation will eventually clear the obstruction, causing a random slow dispersment of the snow. However, to increase the flow of snowfall, and to make it easier to handle, a small amount of talc power can be applied to the snow prior to use. 
     CONCLUSION, RAMIFICATIONS, AND SCOPE OF INVENTION 
     Thus the reader will see that the snowfall simulator provides a decorative, lightweight, easy to use device which produces a visually stimulating addition to any display. While my above description and operation contains many specificities, these should not be construed as limitations on the scope of the invention, but rather as an exemplification of one preferred embodiment thereof. Many other variations are possible. For example, there may be several ways to create horizontal motion of agitation plate 24. One might use a camber and camber follower or a reversing motor with the proper linkage. One might also use a flexible shaft connected to plate 24 which would create a more circular, yet horizontal motion. Motor 14 can be mounted on the back side rather than on the end and have variable speeds. Furthermore, lights can be mounted on the underside to provide light to the display below and to illuminate the snow. Base 24 can be made adjustable to cover larger areas by having attachable sides and bottoms. Base 24 can also be made to resemble a cloud with the use of a decorative facade. Another optional feature in the design of the snow simulator would be a low rpm fan mounted underneath base unit 24 to gently blow the falling snow over a broader area. 
     Thus the scope of the invention should be determined by the appended claims and their legal equivalents, rather than by the examples given.