| 摘要 |
<p>A mechanical lock of the type in which a coil spring (66) is located about a rod (14) to engage and lock the rod (14) against longitudinal movement but which may be unwound to allow longitudinal movement of the rod, the rod being provided with circumferential score lines (62) and the coils of the spring being provided with matching score lines in the area of engagement of the coil with the rod. The score lines on the coil may be formed either before or after the coil spring is wound. <IMAGE></p> |
