Patent ID: 7501173

Claim:
A medallion comprising a thin annular plate having a central annular opening, a first annular ridge adjacent the radially outer edge of said plate, a second annular ridge adjacent said annular opening, a third annular ridge intermediate said first and second annular ridges, said first and third ridges defining a first annular recess, said second and third ridges defining a second annular recess, said opening, ridges and recesses being concentric and said recesses having substantially flat bottoms, and at least two tabs rigidly secured at equally spaced intervals to the radially inner side of said first annular ridge and extending radially inwardly in spaced relation to said bottom of said first annular recess and, a first decorative ring insertable in said first recess including at least two notches at equally spaced intervals on the radially outer edge of said first ring, said notches being sufficiently large to allow passage of said tabs there through when said first ring is inserted into said first recess and at least two detent knobs at equally spaced intervals on the radially outer edge of said first ring engageable with said tabs to releasable hold said first ring in said first recess when said first ring is inserted into said first recess and rotated to bring said detent knobs into detent relation with said tabs, respectively.