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1852年,美国人奥的斯发明了安全钳,极大的提高了只能载货的的升降机的安全保障,从此开创了升降机载客时代。经过一百多年的发展,当时的载人升降机发展演化成现在的电梯,成了现代社会高层建筑中必不可少的运载工具。一般的民众看到电梯,常常有这样的疑虑:钢丝绳会不会断,如果断了轿厢会掉下去吗?而检验人员常会这样回答:“电梯设置有安全钳,若电梯钢丝绳
In 1852, the American Otis invented the safety gear, which greatly improved the safety of the lifts that can only be loaded, thus creating the era of elevator passenger carrying. After more than one hundred years of development, the then manned lifts evolved into the present elevator, which became an indispensable means of delivery in the high-rise buildings of modern society. The general public saw the elevator, there are often such doubts: Will the wire rope break, if the broken car will fall? And inspectors often answer: ”elevator equipped with safety gear, if the elevator rope