| 摘要 |
PCT No. PCT/AU80/00105 Sec. 371 Date Jul. 29, 1981 Sec. 102(e) Date Jul. 29, 1981 PCT Filed Dec. 3, 1980 PCT Pub. No. WO81/01626 PCT Pub. Date Jun. 11, 1981.The mechanism includes one member which may occupy one of two fixed positions and can be caused to change over from one position to the other at will. In order to accomplish rapid change over with minimum energy input and minimum impact, an elastic suspension of this member is provided and so arranged that the changeover process is substantially a half cycle of oscillation in which the moving member starts and ends with no or little speed of motion. The moving member is captured in the vicinity of, and held at the fixed positions, against the force exerted by the elastic suspension by mechanisms exerting short range forces upon it.
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