Bubble machine with protective transparent dome
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     This invention pertains to an amusement device for forming bubbles, and to a temporary preservation of the bubble by shielding it from ambient air effects. 
     2. Statement of Prior Art 
     Prior art devices in this general structural or functional area are representatively shown in the following U.S. patents: 
     
         Pat. No.    Patentee        Issued                                        
______________________________________                                    
2,274,052   Feder           Feb. 24, 1942                                 
2,396,433   Pimblett        Mar. 12, 1946                                 
3,060,626   Panico, Jr.     Oct. 30, 1962                                 
3,473,253   Jakubowski et al                                              
                            Oct. 21, 1969                                 
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     SUMMARY OF THE INVENTION 
     This invention comprises a toy for the production of a variety of bubble effects, and a device which also serves to temporarily shield the resulting bubbles from the ambient atmosphere thus creating a decorative effect. The shield is constructed of transparent material so that the effect can be viewed. 
     The device incorporates a weighted base with a conduit for introduction of air. Within the base a quantity of bubble forming solution is disposed. The conduit is changeably mounted whereby its depth in the solution is variable to produce a variety of bubble effects. 
     A further objective is to provide, in a device as aforesaid, a conduit which prevents withdrawal of the solution therethrough. 
     Other and further objects and advantages of the invention will become apparent to those skilled in the art from a consideration of the following specification when read in conjunction of the annexed drawing. 
    
    
     BRIEF DESCRIPTION OF THE DRAWING 
     FIG. 1 is a perspective view of a bubble machine according to this invention; 
     FIG. 2 is an enlarged sectional view taken substantially on line 2--2 of FIG. 1, looking the in the direction of the arrows; and 
     FIG. 3 is a detail cross sectional view on line 3--3 of FIG. 2, looking in the direction of the arrows. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Referring to the drawing in more detail, the device of this invention is generally indentified therein by reference numeral 10. The device comprises a weighted annular ring 12 which forms the main body section of the apparatus. The ring 12 is of circular section as shown in FIG. 2, and includes inner and outer sides 14,16 and a base 18. Fixedly secured to the ring and spanning its area across the base 18 is a base wall 20 having a bottom surface 22 and a top surface 24. Both the ring 12 and base wall 20 are formed of rigid plastic or similar material. The base 18 of the ring and the bottom surface 22 of the base wall are adapted to rest on a supporting surface S such as a table top or floor. 
     The ring 12 has a slant bore 26 formed therein extending angularly downward from the outer side 16 to the inner side 14. The bore 26 terminates on the inner side at a location elevated in relation to the base wall 20. The bore is generally circular in cross section, and a rectangular slot 28 is formed in the ring to open on the downward or lower side of the bore. 
     The ring 12 and the base wall 20 define a shallow receptacle for a quantity of bubble forming fluid 30. Examples of fluids acceptable for this purpose are soap solutions, detergents, and the like. The fluid is added to a level below the bore entry location in the ring inner side and rests against the ring and the top surface 24 of the base wall. 
     An elongated tube 32 is mounted in the bore 26 for inward and outward sliding movement. The tube 32 has a rib 34 projecting therefrom dimensioned for slidable engagement in the slot 28 to prevent turning of the tube during sliding. Avoidance of turning or twisting is desirable inasmuch as the tube inner end 36 has a slant edge 38 adapted to be maintained in substantially parallel relation to the base wall 20 and immersed in the solution 30. The tube is hollow and has a through passageway 40 therein of a size such that it is unlikely that solution could be withdrawn therefrom during air introduction. The outer end 42 of the tube projects from the rim ring, and terminates in a reduced diameter nipple 44. 
     A generally spherical transparent dome 46 has a truncated base edge 48 adapted to be supported on the surface S about the ring. The dome surrounds the ring in outwardly spaced relation thereto, and has an opening 50 formed therein. A flexible air hose 52 extends through the opening 50 and is frictionally engaged on the nipple 44 of the tube. 
     In operation, air is supplied through the hose and tube into the solution. This results in the formation of one or more bubbles. The bubble effect is protected by the dome and is relatively long lasting. Different effects are created by inward and outward movement of the tube during the air supply operation.