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DC motors produce more starting torque than AC motors, so applications of AC motors on chairlifts is largely limited to smaller chairlift installations, otherwise the AC motor would need to be significantly oversized relative to the equivalent horsepower DC motor. The driveshaft turns at high RPM, but with lower torque. The gearbox transforms ...
A detachable chairlift or high-speed chairlift is a type of passenger aerial lift, which, like a fixed-grip chairlift, consists of numerous chairs attached to a constantly moving wire rope (called a haul rope) that is strung between two (or more) terminals over intermediate towers. In contrast to the fixed-grip version, the chairs of a ...
For sufficiently wide stairs, a rail is mounted to the treads of the stairs. A chair or lifting platform is attached to the rail. A person gets onto the chair or platform and is lifted up or down the stairs by the chair which moves along the rail. Stair lifts are known variously as stairlifts, stair-lifts, chair lifts, stair gliders and by ...
An aerial lift, [1] also known as a cable car or ropeway, is a means of cable transport in which cabins, cars, gondolas, or open chairs are hauled above the ground by means of one or more cables. Aerial lift systems are frequently employed in a mountainous territory where roads are relatively difficult to build and use, and have seen extensive ...
Ski Lift International – United States, founded in 1965, acquired by Riblet in 1973 [citation needed] Ringer – Germany, founded in 1950, closed in 1953 [55] Sacif – Italy; Samson – Canada, manufactured ropeways between the 1960s and 1988 [59] Sakgiproshakht – Soviet Georgia, founded in 1946, closed in 1990 [N 17] Geospectrans ...
An elevator (American English) or lift (Commonwealth English) is a machine that vertically transports people or freight between levels. They are typically powered by electric motors that drive traction cables and counterweight systems such as a hoist, although some pump hydraulic fluid to raise a cylindrical piston like a jack.
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.
Skiing gained in popularity, and soon ski lifts became the major part of the Riblet Tramway Company's business. They built more than 400 lifts, particularly in Washington , Oregon , and California , and as far away as Australia , New Zealand and Chile ; one secondhand American lift has also been relocated to Pakistan . [ 3 ]