"The Fletcher Capstan Table is the only table in the world with its unique properties. It is a circular table which, when rotated at its outer perimeter, doubles its seating capacity, yet astonishingly remains truly circular. The masterpiece is of course the operating mechanism which is beautifully engineered, yet simple and robust … and you can have one built to your exact requirements for a sum commensurate with this functional work of art.
The expansion leaves are stored within the table and, in just four seconds, smoothly and quickly emerge upon rotation, rising and radially expanding outwards as the entire top is turned through 30˚. Existing tables can seat six persons when small, and twelve or more when expanded, but there are other design possibilities."
The rest of the article at gizmag.com
Video of it in action on youtube.com