| 摘要 |
A positioning device comprising a slider acting so as to obtain an alternating rectilinear control movement, means for limiting said movement to a pre-determined travel in one direction or the other while causing said control means to co-operate by members forming an integral part of said slider with positioning means adapted to be put in rotation by said members, said positioning means being coupled directly or indirectly to the positioning element proper, said positioning element being moved in rotation in its plane from one angular position to another angular position. The positioning device finds one of its applications in the control of machine-tools.
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