| 摘要 |
The machine has a flywheel 23 which is arranged to be driven through a dog clutch by manually pulling on a cord 39 which thereby moves a friction plate 24 of the dog clutch out of contact from the flywheel 23. Such action disengages the drive from a sprocket 21 driven by a crank wheel attached to a pair of pedals, and upon releasing the cord a pawl rides over a ratchet and a striker member on the cord actuates the dog clutch to move the friction plate into contact with the flywheel so that drive between the flywheel and the crank wheel is then engaged. Thus a user is able to initiate rotation of the flywheel by pulling on the cord and thereafter to maintain rotation of the flywheel by a pedalling action. The leverages of the foot pedals about the axis of the crank wheel (6) is variable (Fig. 1). <IMAGE>
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