| 摘要 |
<p>The braking mechanism consists of a lever (2) made from two articulated elements (20,21). The free end of the first element is connected to the harness, while its other end has a cam (20b) to press the cable (C) against the bottom of a U-shaped trough (1), the two sides of which have L-shaped notches (10b,11a) to receive the ends of a pivot pin (4) between the two lever elements. The free end of the second lever element (21) turns about a pivot (5) which can slide in a slot (10c) in an extension (10a) of the trough and is spring-loaded away from the notches. A gravity pin (13) on the trough shuts off the slots in the event of the mechanism being fitted upside-down, and a torsion spring (9) on the pivot (4) between the two lever elements keeps them in line. <IMAGE></p> |
