| 摘要 |
<p>An ergometer rowing apparatus having a friction brake system allowing accurate and simple measuring of the work performed by maintaining the frictional force constant in operation The rowing apparatus also includes a worm pulley providing a vairable gear ratio between the handle actuated by the person whose work is to be measured and She brake system, the gear ratio varying during the stroke. Means are provided to permit the force S loading one end of brake string to be varied in accordance with the variations in the force s loading the opposite of the string, this force S being composed of a constant force corresponding to the force s, whereby the difference between the forces at the two ends of the string may be kept approximately constant by adjusting the additional force in accordance with the value of s.</p> |
