| 摘要 |
A speed-sensitive clutch device in- corporates at least one drive-transmitting coupling element (17) which is con- nected to a safety line drum (1) so that it bodily rotates with the drum (1) about its axis of rotation and is displaceable from an inactive position (figure 1) into a drive-transmitting position (figure 2) in which it transmits drive. And the speed- sensitive clutch device also incorporates an inertia member (20) which is freely rotatable about the axis of drum rotation and yet is free to move in rotation rela- tive to the drum itself. The inertia mem- ber (20) is formed and disposed so that on rapid acceleration of the drum (1) it exerts pressure, due to its inertia, against a said coupling element (17) thereby to cause or assist movement of the coupling element from its inactive position into its drive-transmitting position.
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