Convertible table structure for sewing machines

A convertible table structure providing support and dual working surfaces for an open-arm or portable type of sewing machine, comprising an apertured platform having a work top and an underside, the aperture therein being of a size to accommodate the working portions of the sewing machine;

• a platform section adapted to receive thereon a sewing machine and being of size normally fitting closely within the aperture in the platform proper coplanar with the platform work top, said platform section being movable from the normal, coplanar position to a position below the work top, so a sewing machine mounted thereon is placed in suitable working position with respect to the work top, and vice versa, so as to re-establish the coplanar relationship between platform section and platform proper;
• elongate, parallel motion, link means movably attaching said platform section to said platform proper, so as to minimize horizontal movement of the platform section in moving vertically from coplanar position to lowered position and vice versa;
• means attached to the underside of the platform for moving said platform section between its said normal, coplanar position and a lowered position and vice versa, said means for moving the platform section being adapted to limit the extent of downward movement of said link means so as to minimize horizontal movement of the platform section as it is lowered and raised and so as to support the platform section in a maximum lowered position;
• and means for supporting the platform proper at a convenient working level.