Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 6260223 | Pocketed coil spring units Spring sets each include a pair of coil springs joined together by a connecting wire and are encased in individual fabric pockets such that the connecting wire joining the coil springs spans an otherwise empty fabric pocket. A spring unit, mattress or the... | 07/17/2001 |
| 5964453 | Wire grid and wire spring module for use with a furniture spring assembly A wire spring module and wire grid for use in a furniture spring assembly for mounting an array of multiple spring modules to the wire grid and the resulting furniture spring assembly. The wire grid includes a plurality of straight, coplanar wires arrange... | 10/12/1999 |
| 5649332 | Posturized continuous mattress spring core A spring interior of a mattress comprising a plurality of longitudinally extending bands of springs disposed side by side and connected together with helical lacing wires in the top and bottom faces of the bands. Each band of springs comprises a single le... | 07/22/1997 |
| 5418989 | Mattress innerspring using formed wire elements Disclosed is an improved innerspring unit for a mattress using a plurality of formed wire elements for support. Enhanced lateral and longitudinal stability of the improved innerspring is provided by one or more stabilizing features including dual formed w... | 05/30/1995 |
| 4995125 | Bedding box spring having snap-fit modular elements A box spring for supporting a bedding matress. The box spring includes a rectangular base frame, a plurality of modular spring elements mounted atop the base frame, and a wire grid mounted atop the modular spring elements. Each of the modular spring eleme... | 02/26/1991 |
| 4972536 | Longitudinally laced posturized and/or contoured spring bedding product A spring interior comprising a plurality of transversely extending bands of springs disposed side by side and connected together by longitudinally extending helical lacing wires in the top and bottom faces of the bands. Each band of springs comprises a si... | 11/27/1990 |
| 4921228 | Box spring unit with interlocking spring and grid assembly A box spring assembly comprises a horizontal rectangular frame, a generally horizontal mattress support deck disposed a predetermined distance above the frame, and a plurality of deck support springs arranged between the deck and the frame to yieldably su... | 05/01/1990 |
| 4918773 | Posturized spring bedding product A spring interior comprising a plurality of longitudinally extending bands of springs disposed side by side and connected together by helical lacing wires in the top and bottom faces of the bands. Each band of springs comprises a single length of wire for... | 04/24/1990 |
| 4853991 | Bedding foundation having multiple-span sinuous wire springs A box spring assembly includes a base frame, a top wire grid and a plurality of sinuous wire spring strips interconnecting the top wire grid and the base frame. The sinuous wire spring strips each comprises six substantially vertical legs and three spaced... | 08/08/1989 |
| 4790038 | Bedding spring assembly A bedding or seating spring product comprising a spring assembly having multiple rows of coil springs wherein each row of coil springs is made from a single continuous length of wire and wherein each row contains a plurality of coils interconnected by int... | 12/13/1988 |
| 4779293 | Formed wire box spring with spring wire deck A box spring assembly in which the mattress support deck is formed by a plurality of components all of which are formed from spring wire to thereby achieve a support deck of increased strength and improved durability. In addition, the components are struc... | 10/25/1988 |
| 4766625 | Box spring having rows of coil springs formed from a single length of wire A box spring comprises a rectangular base frame, a wire grid, and a plurality of parallel rows of coil springs supporting the grid atop the base frame. Each row of coil springs is made from a single continuous length of wire in which adjacent coils are in... | 08/30/1988 |
| 4766624 | Mattress assembly having rows of coil springs formed from a single continuous length of wire A bedding mattress, including a spring assembly having top and bottom parallel surfaces, padding over the top and bottom surfaces, and an upholstered covering completely encasing said spring assembly and padding. The spring assembly comprises multiple par... | 08/30/1988 |
| 4730357 | Bedding box spring A bedding mattress support foundation comprises a base frame, a plurality of formed wire springs mounted upon the base frame, and a wire grid mounted atop the formed wire springs. Each formed wire spring comprises a generally S-shaped horizontal load supp... | 03/15/1988 |
| 4704752 | Box spring assembly with modular twin continuous spring elements A box spring assembly having modular spring elements distributed in an array beneath rectangular pockets of a wire grid top. The elements include a single piece of wire formed into a head configured to support and be contained within selected pockets of t... | 11/10/1987 |
| 4675927 | Bedding units and springs therefor A bedding unit spring has an upper portion attached to a grid, a lower portion attached to a frame, and a vertically collapsible midportion which connects the upper portion to the lower portion. The upper portion of a spring may have two transverse bars a... | 06/30/1987 |
| 4625349 | Bedding coil spring unit and assembly method A coil spring unit having a series of coil springs connected together in column and row matrix configuration, the end loops of the coil springs being open loops that terminate in free ends, i.e., the end loops of the coil springs not being closed and knot... | 12/02/1986 |
| 3995336 | Spring mats This invention relates to a spring mat, more particularly intended for the manufacture of resilient surfaces, which comprises substantially a series of known spring elements connected with each other into a cloth or a mesh work, each of said elements cons... | 12/07/1976 |
