| 摘要 |
A winch (1) particularly suitable as a yacht sheet line winch. In traditional manner the winch (1) preferably incorporates a cylindrically shaped drum (2) having a shoulder lower end section (2a), in use, the drum (2) being intended to be rotated, such as by handle (10), about a substantially vertically disposed axis. Longitudinal or axially extending recesses (3) are incorporated at radially spaced apart intervals about the drum (2) with the land sections (4a) therebetween maintaining the radius of curvature of the drum (2). The recesses (3) provide additional frictional grip on a sheet line (8) retained thereon. Preferably the recesses (3) terminate in adjacent spaced relationship to a shoulder end (2a) to provide a recess free zone (6). The recesses (3) are configured to provide an obtuse angle between a face (4) of the drum (2) and the adjacent intersection face (5) of a recess (3) this "transition" angle being identified as angle "X" on the accompanying drawings. Preferably both the depth and width of the recesses (3) and the diameter of the drum increase toward a top of the drum (2). This geometry of the recess (3) configuration and layout on a drum (2) tends to spread the frictionnally forces provided thereby away from a first turn (7) of sheet line (8) on the drum (2). |
