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A simple dumbwaiter is a movable frame in a shaft, dropped by a rope on a pulley, guided by rails; most dumbwaiters have a shaft, cart, and capacity smaller than those of passenger elevators, usually 45 to 450 kg (100 to 992 lbs.) [2] Before electric motors were added in the 1920s, dumbwaiters were controlled manually by ropes on pulleys. [1]
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 .
The HDB started the Lift Telemonitoring System (TMS) in 1984 to monitor lifts in high-rise public housing. As at Aug 2007, more than 17,500 lifts are monitored by the system. TMS uses SCADA technology to monitor the status of the lifts in real-time from a centralized master station for events such as breakdown and trapped passengers. The lift ...
A paternoster (/ ˌ p eɪ t ər ˈ n ɒ s t ər /, / ˌ p ɑː-/, or / ˌ p æ-/) or paternoster lift is a passenger elevator which consists of a chain of open compartments (each usually designed for two people) that move slowly in a loop up and down inside a building without stopping. Passengers can step on or off at any floor they like.
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Elevators, Escalators, Dumbwaiters, Power Walks, and Power Ramps Montgomery Elevator Company was a vertical transportation company founded in 1892, but entered the elevator business in 1910, acquired Roelofson Elevator of Galt, Ontario in the early 1960s and operated it as its Canadian Division.
Yan Lift, known in its later years as Lift Engineering, built 31 high speed quads between 1987 and 1994, mostly in the United States and Canada. The detachable grips were of an unusual design, in which a steel bar with V-shaped troughs sat atop the haul rope and were held in place by tensioning assembly with rubber springs.
Depending on carrier size and loading efficiency, a passenger ropeway can move up to 4,000 people per hour, and the fastest lifts achieve operating speeds of up to 12 m/s (39.4 ft/s) or 43.2 km/h (26.8 mph). [1]