| 摘要 |
An annular support device is formed by a series of identical torus segments with adjacent segments connected end-to-end in a continuous loop. One end face of each segment has a central channel for receiving the extension of the adjacent torus segment. The extension-channel interface between adjacent segments defines a twisting axis permitting each segment to be twisted through 360 degrees relative to the other segments. The support device may be twisted into an infinite variety of decorative and useful configurations. Each end face has a raised peripheral rim which abuts with an identical cooperating peripheral rim on the opposed face of the adjacent segment. The rims are circular and define a common interface plane perpendicular to the twist axis therebetween. The torus curve causes the twist axis at each end of a segment to be non-aligned, and prevents individual segments from being twisted relative to both adjacent segments simultaneously. The non-alignment locks each segment in place, and can be displaced only as part of a larger group of segments. The random orientations of the twisting axis tend to oppose displacement of the segments causing the annular device to retain the present configuration. The twist axis through each extension-channel interface passes through the center of the opposed circular rims. The torus surface of each segment is flush and continuous with the torus surface of the adjacent segments. |
