Abstract: A nestably stackable assembly for use in a bedding foundation. The assembly has a rectangular border wire with parallel sides and ends. Transversely spaced, parallel and longitudinally extending support wires are connected at their ends to the border wire ends. The support wires are formed so as to be generally corrugated along their lengths with peaks and valleys. The peaks are flattened at their tops, and the flattened tops are generally coplanar with a plane defined by the border wire. The valleys are vertically displaced beneath and intermediate of the flattened tops. Longitudinally spaced and transversely extending, upper connector wires are connected to the sides of border wires, and the upper connector wires are connected along their lengths to the flattened tops of the peaks of the support wires. The valleys have flattened bottoms, and adjacent pairs of the flattened bottoms of the valley are interconnected by resilient connectors.

Abstract: Described is a spring core for a mattress, consisting of a multiplicity of identically shaped spiral springs with in each case two end rings lying diametrically opposite each other, which change to a spring coil part arranged centered between them, whereby the end rings are shaped approximately circular and consist essentially of two assembly legs, one transition leg and one additional leg and are opened on one side, whereby the leg lying opposite the respective open side of the upper or lower end ring is bent radially outward with respect to the longitudinal axis of the spring.

Abstract: The spring core for a mattress consists of several, identically formed spring coils arranged in side by side rows with each row forming a wire piece having an upper and a lower mutually aligned end spiral in a U-shape, and having opposite legs joined together by a base webb. Adjacent coil springs are joined together at their end spirals along abutting legs by helical connecting springs. To arrange the springs at tight angles in rows and columns, a length of one leg is greater than the length of another leg and all the coil springs are oriented in the same direction, except along a edge region of the spring core.

Abstract: A plurality of main springs and a plurality of intermediate support springs are disposed and fixed on a rectangular base plate. Each main spring has a linear connecting rod portion and two coil spring portions such that one end of each of the two coil spring portions is coupled to a corresponding one of two ends of the first linear connecting rod portion. The main springs are disposed such that these connecting rod portions are perpendicular to each other in a matrix form. The other end of each of the coil springs is fastened to the base plate. Each intermediate support spring has a connecting rod portion and two coil spring portions. The connecting rod portion of each intermediate support spring is shorter than that of each main spring. One end of each of the coil spring portions of the intermediate support spring is coupled to a corresponding one of two ends of the connecting rod portion of the intermediate support spring.

Abstract: A grid structure for engaging and supporting a plurality of coil springs in predetermined spatial relationships so that spring units and completed box spring foundation units can be produced having different numbers of coil springs and consequently different degrees of firmness. The grids are constructed in sizes approximating the dimensions of standard size box spring foundation units, and are formed from longitudinally and transversely extending groups of wires defining a plurality of generally rectangular seats arranged in rows and columns. The top coils of different numbers of coil springs can be engaged with and retained on selected seats in each row to provide the desired degree of firmness of the completed unit. The top coils are restrained against longitudinal and transverse shifting movement relative to their seats and the dimensions of the seats and top coils are such that the top coils can be mounted closely adjacent to each other without overlapping.

Abstract: A mattress supporting foundation unit which is constructed to offer very firm support to a mattress, and which includes a base frame, a horizontal wire mesh spaced above the frame, and support wires for connecting the mesh to and supporting it from and above the frame, with these support wires having portions forming legs which extend upwardly from the base to the mesh and are substantially straight for their entire length between the base and mesh to give the desired rigidity to the overall structure. The support wires desirably also have connector portions which extend laterally between successive legs and are attached to the base and mesh.

Abstract: A rigid spring unit is constructed of coil springs and a top grid comprising a plurality of wires, including a first group or pair of parallel wires spaced apart a distance less than the diameter of the top coil of each spring. A second group of three wires, at right angles to the first pair, includes a pair of outside wires spaced apart a distance less than the diameter of the top coil of the spring and a locking wire intermediate the outside wires. The top coil of each spring includes indentations that permit the top coil to be seated from below, in a pre-stressed, woven fashion into the wires of the top grid.

Abstract: A box spring assembly for use as a supporting foundation for a bed mattress. The assembly comprises a wooden frame, slats, spiral springs, edge coil springs, a border wire and a welded wire top grid. The spiral springs extend transverse to the wooden slats and alternate revolutions of the spiral springs are secured to the slats. At the top, the spiral springs are supported by the welded wire grid. Side edge reinforcement and resiliency is provided by coil springs, each of which is secured at the bottom to the wooden frame and at the top to the border wire and grid.

Abstract: A box spring assembly for use as a foundation for a bed mattress. The assembly comprises a wooden frame, slats, spiral springs, corner coil springs, a border wire, and a welded wire top grid. The spiral springs extend parallel to the wooden slats and are secured at the bottom to the slats and at the top to the welded wire grid. Corner reinforcement and resiliency is provided by four corner coil springs, each of which is secured at the bottom to the wooden frame and at the top to the border wire and grid.