| 摘要 |
The topography of a bowling lane may be adjusted after installation through the use of special truss assemblies beneath the lane that are provided with a height adjustment mechanism that is remotely actuatable at a convenient location. Lane tilt, including side-to-side tilt, may be adjusted through the use of upright, threaded members that raise or lower opposite ends of beams associated with the truss assemblies. Crowns and depressions can be adjusted by way of independently adjustable devices that raise or lower isolated portions of the lane relative to the beam of the truss assembly. Adjustment for crowns and depressions can be provided with or without the ability to adjust for lane tilt. In one embodiment, chains and sprockets associated with such adjustment mechanism can be manipulated from a convenient access opening off to one side of the lane and located below the lane surface, such access opening being covered by an easily removable cap.
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