| 摘要 |
A moving staircase escape-way from offshore platforms, which consists of two pairs of parallel wire ropes that pass through the ends of a plurality of rolls spaced equally apart. Selected rolls, belonging to the first pair of steel ropes lying substantially parallel to rolls belonging to the second pair of wire ropes, are connected to one another by pairs of non-skid rungs, spaced equally apart. The space between the pairs of rungs being about the same as the average height of a man. The moving staircase is fitted onto pulleys on the edge of a cylindrical drum, shafts of which fit into a support on the offshore platform.
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