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Hoist atop an elevator. A hoist is a device used for lifting or lowering a load by means of a drum or lift-wheel around which rope or chain wraps. It may be manually operated, electrically or pneumatically driven and may use chain, fiber or wire rope as its lifting medium.
The system was dubbed Port-El, a play on the words “portal” “elevator”, and his last name. It was patented in 1961. [ 1 ] It did not come to full fruition at the time, as the mechanical relays that controlled elevators were not well suited for complex algorithms, and the patent expired in 1977. [ 2 ]
the rear of the F135 engine (nozzle rotated down) that powers the Rolls-Royce LiftSystem. Instead of using separate lift engines, like the Yakovlev Yak-38, or rotating nozzles for engine bypass air, like the Harrier, the "LiftSystem" has a shaft-driven LiftFan, designed by Lockheed Martin and developed by Rolls-Royce, [3] and a thrust vectoring nozzle for the engine exhaust that provides lift ...
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Inclined elevator design is based on the same basic technology as conventional, vertical elevator. [6] In general standard elevator equipment can be adapted for systems with an inclines up 10° from vertical, while an incline with more than 20° from vertical will require some additional adaptation. [1]
Elevators are necessary for disability access to floors serviced by escalators. Escalators typically rise at an angle of 30 or 35 degrees from the ground. [25] They move at 0.3–0.9 metres per second (1–3 ft/s), like moving walkways, and may traverse vertical distances in excess