| 摘要 |
An adjustable orientation device includes a rigid spherical bearing surface and a sleeve made of a hard, non-visco-elastic material. The sleeve defines an inner surface which is part-spherical and is configured to receive the spherical bearing surface having substantially the same radius of curvature as the part-spherical inner surface and also defines at least one gap. The device includes a means for adjusting the size of the gap in the sleeve, typically a screw clamp which may be associated with an outer sleeve. When the gap is relatively wide, the sleeve can move freely over the spherical bearing surface, however when the gap is narrowed frictional engagement between the sleeve and the bearing surface increases and clamps the sleeve and the bearing surface in a fixed orientation. The device can be used to mount various objects particularly speakers and projectors.
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