Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 6578213 | Stackable bedding foundation 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... | 06/17/2003 |
| 5575460 | Spring core for a mattress 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, whereb... | 11/19/1996 |
| 4817924 | Spring core for a mattress 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 toge... | 04/04/1989 |
| 4619445 | Spring unit 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 spr... | 10/28/1986 |
| 4236262 | Support grid and spring unit for a box spring foundation unit 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 differ... | 12/02/1980 |
| 4069525 | Firm foundation unit for mattresses 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 ab... | 01/24/1978 |
| 4068330 | Woven spring unit 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 wir... | 01/17/1978 |
| 4057860 | Box spring assembly 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 slat... | 11/15/1977 |
| 4012801 | Box spring assembly 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 ... | 03/22/1977 |
