| 摘要 |
<p>The apparatus comprises: a housing (S) carried by a carriage; on the housing a motor (P) able to cause the rotation of a platform with a fixture (5) and a mass (M) comprising guide means (15,17) for the sliding of the mass along an axis orthogonal to the axis of rotation (0), so that the mass is predisposed to take up a retracted position and then a position of maximum distance from said axis in which it is endowed with the maximum momentum; as well as return means (27,29) ro recall said mass from the position of maximum distance to the retracted position, and means to keep it in retracted position over a certain angular displacement of the fixture, and then release it for allowing it to reach again said position of maximum centrifugal force.</p> |
