| 摘要 |
<p>A speed-sensitive clutch device incorporates at least one drive-transmitting coupling element (17) which is connected 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 relative to the drum itself. The inertia member (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.</p> |
