Fontaine's safety cage for mine shafts. If the rope or chain suspending the cage broke a spring was released and levers were thrust into the guide rods, so stopping the cage from plunging to the bottom of the shaft. From Underground Life: or, Mines and Miners by Louis Simonin (London, 1869). Wood engraving.

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TOP09159685

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達志影像

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RM

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須由TPG 完整授權

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