Coil spring assembly with grid and base frame

Claim 1

A spring assembly comprising, in combination, a rectangular grid and coil springs attached thereto, said rectangular grid comprising a border wire and longitudinally and transversely spaced wires attached at their ends to the border wire and at their crossings to each other and said coil springs having top and bottom loops with the top loops attached to the wires on the grid, said transversely spaced, longitudinally extending wires being arranged at a spacing which is less than half the diameter of the top loops of the coils, said longitudinally spaced, transversely extending wires being arranged in pairs with the spaces between pairs less than the diameters of the top loops of the coils and the spaces between the wires of pairs of wires greater than the diameters of the top loops of the coils, said transversely spaced, longitudinally extending wires underlying the pairs of transversely extending wires and being secured thereto at their crossings, the portions of the transversely spaced, longitudinally extending wires between each pair of transversely extending wires containing deviating and non-deviating portions, the deviating portions being displaced upwardly and being located equidistant from the transversely extending wires with a non-deviating portion therebetween, said top loops of the coils defining uninterrupted loops of greater diameter than the distance between any two transversely spaced wires at opposite sides of an intermediate longitudinally extending wire and of less diameter than the distance between the wires of any pair of transversely extending wires such that when the coil is mounted to a seat defined by three longitudinally extending, transversely spaced wires crossing a pair of transversely extending, longitudinally spaced wires, arcuate portions of the top loop will overlie the intermediate one of the longitudinally extending wires inwardly of the transversely extending wires and arcuate portions of the loop at right angles thereto will extend through the deviations of the longitudinally extending wires beyond the longitudinally extending wires.