| 摘要 |
<p>A portable descent apparatus ( 1 ) for use in effecting the controlled descent of a body from an elevated location, for example a multi-storey building, comprises in combination a support frame ( 2 ) having a substantially planar base ( 3 ) and upright supporting end brackets ( 4,5 ), a fixed shaft ( 6 ) extending between said end brackets, a rotatable drum ( 7 ) coaxially mounted on said shaft and having means for attachment of one end of a flexible cable ( 17 ) thereto, the drum ( 7 ) having fixed to one end thereof a manually or remotely controllable calliper-operated disc brake assembly and to the other end thereof a gear driven descent speed controller comprising a toothed annular member ( 13 ) meshing with a pinion ( 19 ) driving a centrifugal brake assembly ( 12 ), the flexible cable ( 17 ) having one end attached to said drum and the other end ( 16 ) thereof having anchoring means for attaching the cable to a fixed position ( 18 ), and a first handle means ( 15 ) attached to the support frame ( 2 ) adjacent to said disc brake assembly and provided with means ( 11 ) for manually or remotely controlling the braking effect of the disc brake assembly, and a second handle means ( 14 ) attached to the support frame ( 2 ) adjacent to said descent speed controller, the arrangement being such that in use the apparatus may be held using the two handle means ( 14,15 ) with the planar base ( 3 ) positioned against the descending body.</p> |
