Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 6739672 | Spring-edge furniture construction A novel support for use with furniture having a spring-edge is provided that includes a coil assembly. The coil assembly is typically square or rectangular with top and bottom surfaces and a front edge that faces the front of the furniture piece. A bridge is secured... | 05/25/2004 |
| 6375169 | Mattress spring cushion assembly with combination of right-hand and left-hand spring units A spring cushion assembly, particularly for mattresses, comprises a plurality of spring coils aligned with one another in parallel linear spring coil rows and parallel linear spring coil columns perpendicular to the spring coil rows, each spring coil bein... | 04/23/2002 |
| 6012190 | Foldable bed with collapsible sinuous springs A body support moveable between unfolded and folded positions comprises: serially interconnected body, cavity and seat sections defined by respective upper and lower grids and including resilient members. The body, cavity and seat sections have their uppe... | 01/11/2000 |
| 5927696 | Spring elements and articles of manufacture incorporating the same Improved spring elements have a unique energy absorbing element that responds to applied loads to produce counter-acting forces that act to absorb the energy of the applied loading. The greater the magnitude of the applied loads, the more the counter-acti... | 07/27/1999 |
| 5499414 | Innerspring construction including improved edge characteristics An improved innerspring construction such as a mattress or box spring unit which includes improved edge support characteristics. A torsion edge support unit is disclosed which may be placed about the periphery of an innerspring construction with a minimum... | 03/19/1996 |
| 5370373 | Laced border support spring A border support spring has a pair of complementary torsion wires for providing increased resilient border support to a mattress spring assembly. Each torsion wire of the present invention is bent to have an elongated center section having a pair of space... | 12/06/1994 |
| 5265291 | Box spring corner support An improved spring is provided which may be used in cushions, mattresses, or box springs which includes a limiting internal member. This limiting member assist in limiting the longitudinal deflection of the springs. Also provided are snapped-fitting conne... | 11/30/1993 |
| 5149064 | Foundation unit edge support system An edge support system for a mattress foundation. The edge support system includes a pair of torsion elements, each including a central torsion segment, with the torsion segments being secured to one another, and with the torsion elements being formed as ... | 09/22/1992 |
| 5027459 | Auxiliary frame and grid and interaction with mattress periphery A mattress construction includes upper and lower structures defining generally parallel planes, and coil springs operatively connected to such structures and located between those planes, and with: (a) at least one of the upper and lower structures including a... | 07/02/1991 |
| 4905333 | 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... | 03/06/1990 |
| 4867423 | Spring assembly having reinforced edge construction A rectangular spring assembly (10,10') of the continuous coil type is disclosed as including continuous coil edge reinforcers (20) at a first set of opposite margins (12) between which continuous coils (16) extend. Additional edge reinforcers (24,24') are... | 09/19/1989 |
| 4813656 | Grid frame A grid frame for a spring assembly comprising a border wire transversely and longitudinally-crossing line wires, and spring wires disposed between adjacent line wires either transversely of the frame or longitudinally thereof.... | 03/21/1989 |
| 4781360 | Spring assembly with helical coils of spring wire with unknotted ends A spring assembly wherein there is a rectangular border wire and there are coils disposed in spaced, parallel rows within the border wire. The coils in the rows of coils lap and are connected by helices of wire. The helices of wire connect the adjacent ro... | 11/01/1988 |
| 4114867 | Coil spring assembly A spring assembly embodying along the front edge a row of coil springs, each of which has end loops and intermediate the end loops a series of turns which diminish in diameter from the top to the bottom, the loop at the top being inclined to the axis of t... | 09/19/1978 |
| 3942776 | Upholstery coil spring A tempered resilient wire forms an upholstery coil spring which has a plurality of interconnected turns, with the top turn being a closed flat loop extending upwardly from the rear of the spring at a given angle to the horizontal, a second turn located im... | 03/09/1976 |
