| 摘要 |
A lever or piston which when mounted securely will provide rising, lowering or variable rate output force and distance movement for a given input. The lever is preferably a brake or clutch lever. This may be achieved in different ways, including cam and followers (fig 1), mechanical piston (fig 2), off-set or oval cogs (fig 3), or an hydraulic stepped piston (fig 4). The mechanisms may be built into a brake or clutch lever. The mechanisms may also involve additional springs to aid feel, to return the mechanism to a start position and/or to eliminate cable slack.
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