| 摘要 |
Apparatus for converting rotary motion from a source of power which may be of constant speed into a rectilinear force includes a coupling arrangement for driving an eccentrically unbalanced flywheel at a cyclically varying rotational speed and linkages for altering the timing of the cyclical variation of speed of the eccentrically unbalanced flywheel. The apparatus comprises a cam element which is driven at a constant rate of speed about an output axis which is perpendicular to its face. The cam element has a slot extending diametrically across its face, configured for slidably engaging a pin which is located on a cam follower. The cam follower is freely rotatable about an input axis that is offset from the output axis by an amount which allows the pin to remain in the slot when the elements are rotated. The cam follower in turn drives the flywheel at a cyclically varying rotational speed.
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