before explaining the invention in detail , it is to be understood that the invention is not limited in its application to the detail of construction and arrangement of parts illustrated in the drawings since the invention is capable of other embodiments and of being practiced or carried out in various ways . it is also to be understood that the phraseology or terminology employed is for the purpose of description only and not of limitation . referring to fig1 , 3 , and 4 , jewelry system 20 includes decorative head 24 which mounts on bars 28 and 30 of item of jewelry 32 which may be scaled in size to adorn a finger . head 24 is retained on ring shank 34 , by retainer slide 38 . head 24 carries a jewelry design stone or combination thereof 40 . when head 24 is assembled on ring shank 34 , the design is normal to the appendage circled by shank or loop 42 . side wall 46 is open to bottom 50 of the head for receiving bars 28 and 30 trough the wall into the head . sides 52 and 54 of arched apertures 56 and 58 limit lateral displacement between the head and the bar so that design 40 is normal to the appendage . spaced apart apertures 56 and 58 which are formed in wall 46 have corresponding apertures 56 &# 39 ; and 58 &# 39 ; formed in opposite side wall 142 to receive and locate the two parallel bars 28 and 30 . bars 28 and 30 , being next to one another present a generally oblong or irregular profile element 60 in cross section which , in cooperation with upper edge 62 of apertures 56 and 58 and retainer slide 38 , limits rotational displacement between head 24 and oblong element 60 in a direction around element 60 . retainer slide 38 is made of spring metal in a u - shape . legs 64 and 68 are closer together at apex 72 of the u - shape than they are at grip end 76 . width 78 of the legs is less than width 80 of slot 90 which receives retainer slide 38 . width 84 of the legs at the grip end is greater than width 80 so that when retainer slide 38 is fully inserted into slot 80 , shoulders 96 and 98 spring outward against wall 104 to prevent withdrawal of the retainer slide from the head . one or both legs may include a portion which extends laterally behind wall 104 when the shoulders spring outward against wall 104 , to provide a lock that further prevents withdrawal of the retainer slide from the head . retainer slide 38 , when fully inserted into head 24 , may be removed by squeezing the legs together by applying finger or tweezer pressure on surfaces 110 and 112 of the legs . support plates 132 and 132 &# 39 ; below the retainer slide support the retainer slide below bars 28 and 30 . edges or sides 52 and 54 of apertures 56 and 58 , and edges or sides 52 &# 39 ; and 54 &# 39 ; of apertures 56 &# 39 ; and 58 &# 39 ; guide element 60 , and limit lateral movement shown by arrows 144 . the upper edges of the apertures , in cooperation with upper surface 150 ( see fig2 ) of retainer slide 38 , and the irregular profile of element 60 limit rotational displacement in a direction around element 60 . the rotational displacement is shown by arrow 154 . referring to fig2 , and 4 , pressure surfaces 106 and 108 of retainer slide 38 are in engagement with edges 114 and 116 of slot 90 in wall 104 and resist withdrawal of the retainer slide from the head . shoulders 96 and 98 are forced toward one another by edges 116 and 114 of wall 104 , against the urging of internal spring portion 118 of retainer slide 38 to keep them apart . when legs 64 and 68 are squeezed together enough so that the distance between surfaces 106 and 108 is reduced to less than width 80 of slot 90 , the retainer slide can be easily withdrawn from head 24 . fig5 shows decorative head 24 on a bracelet or necklace 166 item of jewelry having two strands or chains 168 and 170 . the strands are guided by openings 53 - 53 &# 39 ; and 55 - 55 &# 39 ; and retained by retainer 38 on head 24 , in the same manner as the head 24 is joined to the bars 28 and 30 of ring 34 . although the present invention has been described with respect to details of certain embodiments thereof , it is not intended that such details be limitations upon the scope of the invention . it will be obvious to those skilled in the art that various modifications and substitutions may be made without departing from the spirit and scope of the invention as set forth in the following claims .
a jewelry item having an interchangeable head capable of being attached to different jewelry items , such as a ring , bracelet or necklace .