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拧紧螺丝用的工具在宾夕法尼亚州塞拉第一次试验以来,已经走过了好长一段路。 1933年的一天,宾夕法尼亚州塞拉的“列哈依谷”铁路库房里的机修工们感到好奇和怀疑。有人告诉他们:一台独特的工具将能代替他们去拧和敲击那些锈蚀而紧锁的机车螺栓。他们总是得使足了劲,用一根足够长的套管把这些螺栓弄下来。这天,从几英里外的英格索尔-兰德公司在宾州的艾新斯工厂来了几位工程师拿出了新发明的工具,他们声称这工具会产生足够大的扭力,在几秒钟内就能把即便是锈蚀最严重的螺栓松掉。
Tools for tightening screws have come a long way since the first test at Celanese, Pa. One day in 1933, mechanics in the Lieha-Yatra Railway Depot in Sierra, Pa., Were curious and suspicious. Someone told them: A unique tool would replace them to screw and hit those rusty and locked locomotive bolts. They always have to work hard enough to get the bolts down with a long enough sleeve. On that day, a few engineers from Ingersoll Rand, a few miles away, at the Ain Si plant in Pennsylvania, came up with newly invented tools that claimed that the tool would generate enough torque, Within seconds, even the most corroded bolts can be loosened.