Abstract: A spring foundation unit having one or more pairs of inner border members on the top and bottom surfaces of the unit. In a conventional fashion, the spring unit has a plurality of transverse rows and longitudinal columns of coil springs, and top and bottom perimeter border wires extending along the outer periphery of the unit and attached to outer coil springs of the transverse rows and longitudinal columns. The inner border members have side elements extending parallel to opposed sides of the unit, with one or more spring widths separating the side elements from the perimeter of the unit. Each side element has a free end which is attached to an end section of the perimeter border wire, and a cross-connecting element interconnecting the opposite ends of the opposed side elements of each inner border member. In one embodiment of the invention, the cross-connecting elements of each pair of inner border members are straight and have at least one spring width separating them.

Abstract: The entire assembly includes an upper supporting panel, a base, and spring body means between the panel and base. The panel comprises a rectangular border frame and a grid made up of a series of grid wires extending longitudinally and another series extending laterally to define rows of rectangular openings serving as spring seats. The spring body means comprise coil spring bodies and attachment heads made up of single lengths of wire. The heads are bent to U-shape with a rectangular pattern similar in size and shape to the spring seats, and portions are offset to resiliently grip the grid wires defining a selected spring seat above and below the grid and lock the head in place. The rectangular engagement of the spring components with the spring seats prevents rotation in their mountings.

Abstract: The invention pertains to a wooden frame structure for a box spring. Two spaced, parallel, upright members form elongated side rails which are initially held together by a base slat extending between the side rails at either end thereof, the base slats being affixed to the bottom of the side rails in recesses therein. Above each base slat, an end slat is installed extending between the side rails, each end slat having a formation such as a tenon formed on either end thereof which engages a corresponding formation such as a mortise formed in each side rail. Normally, at least one center slat, depending on the ultimate frame dimension, lies on its side between the end slats with each end of the center slat lying on a portion of the top of one of the base slats. A plurality of upright cross slats extends between the side rails, and similar to the end slats, each cross slat has a tenon formed in either end thereof which interlockingly engages a corresponding mortise formed in each side rail.

Abstract: A coil spring supporting grid structure of the type used to reinforce the top surface of a box spring foundation unit is provided with formations on the longitudinal and transverse wires thereof, enabling a snap-in interconnection with a plurality of coil springs to form a spring unit assembly. Each coil spring convolute engaged by the grid structure is supported on a pair of upwardly extending formations from a pair of spaced parallel first wires and is locked in place by means of two downwardly depending formations from a pair of spaced parallel second wires which extend transversely with respect to the first wires to form the grid.

Abstract: A box spring mattress is supported a predetermined distance above a floor by a bed base including panels connected at their ends to form a rectangular frame and a pair of cross-supports resting crosswise on the edges of an opposed pair of notched panels. Each cross-support has a generally flat surface which is generally parallel to the floor and on which the box spring rests, and a downwardly pointing brace. The braces nest in the notches in the panels and the support surfaces are essentially flush with the unnotched portion off the notched edges of the panels. Each brace includes notches which lockingly connect with the notches in the panels so that the cross-supports cannot move laterally relative to the base. There are stop members at the opposed ends of each cross-support for restricting the lateral movement of the box spring relative to the base.