| 摘要 |
<p>A dual-feed single-cam compound bow construction which eliminates one of the let-off cams from a conventional compound bow by providing a dual-feed single cam (18,27,28) with an opposed concentric pulley (17) whereby the increment of feed-out caused by the drawing of the bow is balanced against the increment of take-up so that the same amount of cable (22) is fed to both ends of the bowstring (22a) during the drawing operation. This is accomplished by designing the respective radii of the cam and pulley grooves to balance the rate of feed-out of both feed-out sections (22a,22b) of cable from the let-off cam (18,27,28). <IMAGE></p> |
