That most humble, yet essential component to be found in the engineer's armoury - the spring - takes many forms; but one, in particular, offers distinct advantages over the conventional coil format. Brian Goode makes a convincing case for the crest-to-crest wave spring.rnNon-coiled springs made from many different materials have been used since before the second century, with simple spring mechanisms evident in recorded designs from as far back as the Middle Ages. In 1250, for example, Villard de Honnecourt devised a 'power' saw which used a water wheel to push the saw blade in one direction, simultaneously bending a pole; as the pole returned to its unbent state, it pulled the saw blade in the opposite direction.
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机译：在工程师的军械库中发现的最卑微但必不可少的组成部分-弹簧-有多种形式。但是，特别是与常规线圈形式相比，具有明显的优势。布莱恩·古德（Brian Goode）提出了一种令人信服的波峰到波峰弹簧案例。rn从第二世纪开始，就已经使用了由许多不同材料制成的非盘绕弹簧，这种简单的弹簧机构早在中世纪就已经被记录在案的设计中。 。例如，在1250年，比利亚德·德·洪内库特（Villard de Honnecourt）设计了一种“电动”锯，该锯使用水轮沿一个方向推动锯片，同时弯曲一根杆；当刀杆回到其弯曲状态时，它以相反的方向拉动锯片。
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