| 摘要 |
A spinning top comprises a casing in which is located a gear including a vertical shaft extending downwardly from the casing, the uppermost portion of the said shaft being a Z-profiled bar, the sidewardly extending arms of which are in frictional contact with the ends of oppositely disposed horizontal axles turning in seats provided in the inner wall of the casing. On each of the said horizontal axles a crown wheel is keyed, both crown wheels being in mesh with a pinion, the central axle of which is fixedly connected with the uppermost part of the spinning top casing.
|
