发明授权
US3974577A Method and apparatus for the rotation of a spherical object around a virtual axis passing through its center 失效
球形物体围绕穿过其中心的虚拟轴线旋转的方法和装置

Method and apparatus for the rotation of a spherical object around a
virtual axis passing through its center
摘要:
A method and apparatus for assuring the rotation of a spherical object around a virtual axis orientable at will. The object which is to be turned rests on at least three elements for suspension and rotation, whose relative orientation determines that of the virtual axis of rotation of the spherical object.
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