Clutch mechanism for use in safety apparatus

A - Human Necessities – 62 – B

Patent

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Details

A62B 35/04 (2006.01)

Patent

CA 2178839

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.

Un dispositif d'embrayage sensible à la vitesse comprend au moins un élément de couplage (17) à transmission d'entraînement qui est relié au tambour (1) d'un câble de sécurité de façon à tourner physiquement avec le tambour (1) autour de l'axe de celui-ci, et qui peut être déplacé d'une position inactive (figure 1) pour être mis dans une position de transmission d'entraînement (figure 2) dans laquelle il transmet l'entraînement. Ce dispositif comprend également un élément d'inertie (20) susceptible de tourner librement autour de l'axe de rotation du tambour et qui est cependant libre de se mettre en rotation par rapport au tambour lui-même. Cet élément d'inertie (20) est conçu et placé de telle manière que, lors d'une accélération rapide du tambour (1), il exerce une pression, de par son inertie, contre l'élément de couplage (17), provoquant ainsi ou aidant le déplacement de celui-ci de sa position inactive à sa position de transmission d'entraînement.

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