| 摘要 |
A self-contained safety device for self-lowering a person comprises an elongated high-strength safety webbing to support a person and a reel for releasably housing said webbing. The device comprises a generally figure 8 shaped member having two aligned apertures, a seat comprising a non-slip buckle means and two elongated seat webbings to form a big hole and one-half of waste hole. A friction knot is formed by passing the safety webbing through one aperture of the figure 8 member, said friction knot being manipulatable to extend the webbing at a controlled rate, and means at the free end of the safety webbing for anchoring the webb during lowering of the person.
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