Support mechanism for insect repellant holder
BACKGROUND OF THE INVENTION 
     Various insect repellant devices have been used to provide insect (bug) free atmospheres outside homes or apartments, e.g. on porches or patios. One common insect repellant device is a citronella candle contained in an open-topped jar; a wick extends upwardly from the wax-citronella mixture within the jar. The wick is lighted to melt the wax and vaporize the citronella into insect-repellant form. One or more of these open-topped jars is/are positioned in or near the area requiring protection from bugs and insects. 
     SUMMARY OF THE INVENTION 
     My invention relates to a low-cost mechanism for supporting these insect-repellant devices on a railing, e.g. a porch railing or patio enclosure railing. 
     A particular aim of the invention is to provide a support mechanism that can be attached to the railing without drilling holes in the railing or making any modifications in the railing structure. A related object is to provide a support mechanism that can be easily removed from the railing when it is not needed, e.g. during winter months or when the user is changing his/her residence, without leaving any marks on the railing structure. 
     Another object of the invention is to provide a support mechanism that utilizes pre-existing vertical posts in the railing to partially circumscribe (contain) the insect repellant holder. In a sense, I have devised a unique railing-support mechanism assembly. 
     A further object is to provide an unobtrusive support mechanism that blends into the railing structure decor. The ornamental characteristics of the railing are preserved to a great extent. 
     Another object is to provide a support mechanism that can be mounted at different heights (locations), on the railing, according to individual desires or optimum positions for bug repellent action. 
    
    
     THE DRAWINGS 
     FIG. 1 is a top plan view of a support mechanism embodying my invention. The mechanism is shown in a position installed on a porch (or ratio) railing. 
     FIG. 2 is a sectional view taken on line 2--2 in FIG. 1. 
     FIG. 3 is a sectional view taken on line 3--3 in FIG. 1. 
     Fig. 4 is a view similar to Fig. 1, but illustrating a second form that the invention might take. 
    
    
     DESCRIPTION OF A PREFERRED EMBODIMENT 
     The drawings fragmentarily shows a conventional porch (or patio) railing that comprises a number of vertical metal posts 10 evenly spaced in the horizontal direction. Each post is commonly about thirty inches high; the upper and lower ends of the posts are welded (or otherwise connected) to horizontal rails, not shown. Usually the posts are formed out of metal tubing having a square cross section. The outer surfaces of the posts and rails ar usually painted dull black to give the railing a pleasing appearance. 
     My invention relates to a mechanism 12 for supporting an insect repellant holder 13 in the space between two adjacent posts (any two adjacent posts). Holder 13 is a globe-like container (formed of glass or plastic) having a generally flat bottom wall 14 and an open top 16. A wax-citronella mixture is contained within container 13 for generating a vaporous bug repellant gas (when ignited by a wick embedded in the wax mass). 
     Mechanism 12 comprises two horizontal bars 17 extending between two posts 10. Each bar is slightly longer than the post spacing, such that end areas of the bars overlap side surfaces of the posts. The bars are arranged on opposite sides of the railing, such that each of the two posts 10 is located between end areas of the two bars. 
     Two bolts 19 extend through aligned holes in bars 17. A nut 21 is screwed onto each bolt, such that bars 17 are clamped against outer side faces of posts 10. The nuts can be unscrewed from the bolts when/if it is desired to remove mechanism 12 from the railing. 
     Support mechanism 12 includes two L-shaped brackets 23 secured to bars 17 (one bracket for each bar). Each bracket is formed of flat strip material (e.g. steel) bent into an L-shape to provide a horizontal leg 24 and vertical leg 26. One end area of each horizontal leg 24 is welded or otherwise adhered to an upper flat face area of the associated bar 17. Each bar 17 is a hollow metal tube having a square cross-section (FIG. 3). 
     Vertical legs 26 are spaced apart by a distance that is only slightly greater than the outside diameter of insect repellant holder 13. Holder 13 can be readily placed in the space circumscribed by bracket legs 26. 
     At the time I conceived this invention I discovered that in conventional wrought iron railings the vertical posts are commonly spaced apart approximately four and three quarter inches. It so happens that citronella bug repellant holders have diameters approximately four and one half inches. Thus, the citronella holders can be conveniently fitted into the space between adjacent posts 10. The posts cooperate with bracket legs 26 to circumscribe a central space 30 sized to accommodate holder 10. 
     My invention contemplates a low cost support mechanism that can blend into the ornamental decor of conventional wrought iron railings. The bars 17 and brackets 23 are preferably painted a dull black to harmonize with posts 10. The square cross section of bars 17 is similar to the square cross section of posts 10, such that the bars appear to be integral parts of the railing (not separate add-on devices). Brackets 23 have flat surfaces conforming to the flat surfaces on posts 10, such that brackets 23 do not alter the general appearance of the railing structure. Support mechanism 12 has a &#34;built-in&#34; appearance that preserves the ornamental appearance of the railing. 
     FIG. 4 illustrates another form of the invention wherein two solid flat rectangular cross section bars 17a and 17b are used in place of the two tubular bars 17. Bars 17a and 17b are clamped to posts 10 by means of threaded connector means 19, 21. 
     The two angle elements 23 are replaced by a single U-shaped element 32 that is welded or otherwise attached to the upper edge of bar 17a at a point midway along the bar length. Element 32 includes two upstanding arms 26a and 26b that circumscribe a central space 30 sized to receive the insect repellent holder 13. Element 32 overlies bar 17b without being connected thereto.