| 摘要 |
A platform supports a shaft assembly that extends upwardly in a direction perpendicular to the horizontal plane of the platform and through a disk mounted for rotation on the shaft assembly above the platform. The disk is rotated at a preselected speed and carries on the circumferential edge portion thereof a plurality of liquid filled reservoirs spaced from one another completely around the circumference of the disk. Buoyantly positioned in each reservoir is a hollow piston having a piston rod extending outwardly from the reservoir. Mounted on the shaft assembly is an adjustably movable cam having a cam track eccentrically positioned with respect to the axis of the shaft assembly. The piston rod end portions are positioned oppositely of the cam track for movement into and out of contact with the cam track upon rotation of the disk which carries the reservoirs. A load head applies a force downwardly upon a bent flexible shaft which engages a shoulder on the maximum radial sector of the cam to move the cam to a preselected position for displacement of the pistons in the reservoirs as the disk rotates about the cam. The relative displacement of the liquid in the reservoirs by the movement of the pistons in response to the contact of the piston rods with the cam track creates an unbalanced centrifugal force for movement of the platform in a preselected linear direction.
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