| 摘要 |
A mine life line system utilizing a life line having direction indicating means for indicating, when touched, the direction towards the outside of the mine. The direction indicating means is formed so that as the miner walks towards the outside of the mine, running his hand along the life line, his hand meets little resistance if he is going in the proper direction. The direction indicating means can be an enlargement which is formed integral with or attached to the life line. The enlargement can be formed with a gradual slope on one side along which a hand can easily move when traveling in the right direction, and a stop or abrupt slope, which tends to stop the hand, when traveling in the wrong direction. The direction indicating means and/or the life line can be formed from luminesce or reflective material. A spring loaded reusable support is provided for supporting the life line.
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