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全球有超过7.8亿人依然使用煤油照明,但这种燃料价格昂贵,燃烧时还会释放有毒物质,并且容易引起火灾。2008年,伦敦工业设计师马丁·里迪福德和同事吉姆·里弗斯决定发明一种更廉价、安全的照明工具。里迪福德知道,下落的重物能产生驱动一个有摆落地大座钟的能量,那么同样的原理是否可用于照明?为了找到答案,他将一个发条手电筒连上一个自行车轮,然后再将一个重物悬挂在车轮上使之旋转;轮子带动发条,成功地让手电筒亮起来。
More than 780 million people around the world still use kerosene lighting, but the fuel is expensive, burns toxic substances and can easily cause fire. In 2008, London-based industrial designer Martin Rideford and his colleague Jim Rivers decided to invent a cheaper and safer lighting fixture. Ryddowford knew that the same weighting could be used to illuminate the fact that the falling weight produced energy that would power a clock with a pendulum to the ground. To find the answer, he attached a clockwork flashlight to a bicycle wheel and then A heavy object hangs on the wheel to make it rotate; the wheel drives the clockwork to successfully light up the flashlight.