GB190707260A - Improvements in or relating to Fire-escape Apparatus - Google Patents

Abstract

7260. Engel, F. G. S. March 26. Fire-escape type of apparatus; brakes; winches.- A fire-escape comprises a winch ieel from which the person escaping is suspended by a cable; which is rewound by a spring acting through multiplying - gearing ; the reel is also geared through a double train of skew gearing to a centrifugal brake, which acts only during descent of the load. Fig. 1 is a side elevation of the mechanism with part of the casing removed, and Fig. 8 is a sectional plan. The drum a is mounted on an axle 0 secured in the walls of the casing B, and receives the cable m from which is suspended a sling Q, a spring D being interposed to prevent shock. The drum carries a ring of skew teeth E gearing with a pinion d, the shaft of which is connected by a pawl aud ratchet within the socket n<1> to a shaft n carrying a worm-wheel engaging a worm R loosely mounted on the axle 0. A plate L, fixed to the worm R, carries a pair of pivoted levers T, the longer arms of which fly outwards under centrifugal force, and cause the shorter arms to engage pivoted brake levers A and press them into contact with a fixed ring K. A spring is arranged to retract the brake blocks. The rope is rewound by a spring having one end fixed to a pin on the stationary disk F, and its other end fixed to a sleeve P, which is geared by the toothed wheels S, H to the drum a. A pair of rollers is mounted in the casing to guide the cable m where it passes through the circular rim.