US Patent 9729185 Self-centering and adjustable mount

A circular housing having a top surface and a bottom surface, and an inner chamber, where a ring on the top surface of the circular housing has a teethed upper surface, and a housing magnet is located within the inner chamber of the housing. A lid is to be located on the top surface of the housing, and a lid magnet located within the lid is magnetically attracted to the housing magnet when the lid is positioned on top surface of the housing. The outer perimeter of the top surface of the lid is teethed, and the teethed outer perimeter of the top surface of the lid and the teethed upper surface of the ring interlock when the lid is positioned on top surface of the housing.