Abstract: An extensible, vehicle-mounted ladder with movable rungs is used to aid in raising and lowering in rescue operations. The ladder includes a rotatable base having storage space to hold extra rungs supporting the variable extended positions of the ladder. The ladder includes a plurality of ladder units or extensible booms. Each ladder unit includes four C-rails. A first ladder unit is attached to the rotatable base and the others extensible therefrom. The ladder includes rungs that slidably engage within two of the C-rails. A drive cable connects the rungs in a closed loop and is powered to enable rung rotation in a closed loop around the ladder units within the C-rails.

Abstract: An emergency escape device includes a hollow frame body adapted to be mounted on an uppermost floor of a building, and having first, second and third chain shafts mounted rotatably thereon. A transmission unit couples the first chain shaft to a motor unit. A ladder unit includes right and left endless chains, each of which has an upper chain portion extending into the frame body and a lower chain portion disposed downwardly and outwardly of the frame body. The upper chain portions of the right and left endless chains are trained in sequence on first, third and second chain wheels mounted respectively on the first, third and second chain shafts. Linking bars are spacedly disposed to interconnect the right and left endless chains.

Abstract: The present invention relates generally to the safety equipment of a circulatable ladder. The device requires no automatic power and can be operated for heavy loading capacity. The device includes a track set, a circulatable chain mounted along the track set, a securing device secured to a building for securing thereon the track set and a decelerator mounted on the securing device for slowing down the circulating speed of the circulatable chain.

Abstract: A fire escape includes a pair of wheels having upper and lower wheels, two looping cables fitted with plurality of transverse rods tensioned by the two wheels and also fitted with plurality of platforms extending from partial transverse rods and a gear box driven by the upper wheel and designed to increase the rotation speed by several gear sets in the gear box wherein the first gear set of the gear box is fixed with a driving disc outside the gear box to be preliminarily slackened the rotation speed by a frictional clamping collar disposed around the inner driving disc and the third gear set of the gear box is fixed with a rotating arm which is pivotedly connected with two crank levers each terminated with a centrifugal block to thereby extend the centrifugal block to frictionally contact the inside wall of a drum casing to further slacken the rotation speed of the upper wheel and slow down the descending speed of platform when loaded by weight for safer escape.

Abstract: A building evacuation system includes an endless conveyor member having a plurality of platform members secured thereto and upper and lower support means for supporting the endless conveyor and permitting orbital movement thereof. An elongated tubular member through which the endless conveyor passes has at least one opening in the wall generally facing the building to permit evacuees to enter the tube and get onto a platform member or emergency personnel being delivered to said building to exit from the tubular member through the opening. The platform members preferably have a rod which is rotatably secured to the endless conveyor and a platform portion disposed at or adjacent the lower end of the rod. A generator which is adapted to generate electricity responsive to movement of the conveyor may be provided. Also, a brake member which is adapted to control the orbital speed may be provided. A method of evacuation employing equipment of the above-described type.