Patent for a new and improved box-spring. This design consists in "[t]he combination of the main frame, the springs having their connecting pieces curved or coiled to form double heart-shaped configurations, the hinged head-rests, the wide bails, movably attached at the ends of their side pieces to the connecting-pieces of the springs at the side edges of the head-rests, and having their middle pieces curved or coiled to form heart-shaped configurations resting upon the tops of the springs of the head-rest, and the coiled wire coiled around all the portions of the springs" (lines 76-87).