| 摘要 |
The machine has a stationary spiral element 600 nested with a movable spiral element 601 and, in use, the central portion of element 601 moves around a circle defined about the center of the element 600, and the portion distant from said central portion moves in reciprocating motion in either a rectilinear or an arcuate locus. In view of such complex movement of the element 601 it is necessary to maintain the desired cooperating relationship between the two nested elements 600,601. This is achieved by providing a limit element or elements, e.g. a link 651, balls (751, Fig. 16) or keys (Figs. 20 to 27) between the nested elements. <IMAGE> |
