Coil spring assembly

Claim 1

A coil spring assembly including a rectangular wire peripheral frame, a first set of spaced, parallel anchor wires extending between one pair of opposite sides of the frame and a second set of spaced, parallel anchor wires extending between the other pair of opposite sides of the frame to form a grid having rectangular segments formed by the anchor wires or by the anchor wires and one or two sides of the frame, a series of coil springs, each spaced from one another, extending perpendicularly to the plane of the grid and each having an end turn adjacent a rectangular segment with the sides of the segment being adjacent and substantially tangential to portions of the end turn, each anchor wire being shaped to provide a series of U-shaped hooks, one for each spring adjacent the wire, extending laterally of the length of the wire and having a lateral dimension corresponding to the thickness of the turn of the spring, each hook being engaged with the end turn of the respective spring, each anchor wire having bent ends engaging the respective wire sides of the peripheral frame with the anchor wire in torsion to tightly engage each hook with the respective spring, each anchor wire when detached from a peripheral frame being removable from engagement with the respective springs and engageable therewith by rotation of the wire about its longitudinal axis, and the portions of the end turns of the springs adjacent a side of the peripheral frame being tightly secured thereto.