| 摘要 |
A system for the evacuation of individuals trapped in multiple-story buildings ( 10 ) by gliding down a rescue sleeve ( 14 ), comprising a first helical sleeve supporting spring ( 20 ) of a first diameter, spiraling from an elevated level of the building ( 10 ) down to a lower level thereof. A second helical sleeve supporting spring ( 22 ) is provided being of a second, smaller diameter, spiraling from the elevated location down to the lower level. The second spring ( 22 ) extends within, concentrical with respect to and having the same pitch as that of the first spring ( 20 ). A sleeve ( 24 ) made of sheet material is positioned between the first and second sleeve supporting springs, attached thereto by series of distanced rigid rings ( 32 ) slideably coupled to both the first and the second springs. According to a modified version only one helical sleeve supporting spring is employed.
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