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Prevent closing of elevator doors when passengers approach, stand near or at the door edge, even from a flat angle. 2.5 cm from elevator cabin. 3.0 cm from elevator lobby. 50 cm for door horizontal sensing. 1.8 m for door vertical sensing. Should not fail if any fail-safe related to safety device fails.
Rarely are car slings, rails, or other heavy structures changed. The cost of an elevator modernization can range greatly depending on which type of equipment is to be installed. Modernization can greatly improve operational reliability by replacing electrical relays and contacts with solid-state electronics.
A newly opened elevator in 1979 The 1970s saw the first major renovations to the station in four decades. In 1972, the agency received a federal grant that funded two-thirds of a $14.3 million modernization program for downtown stations, included $4.2 million for Park Street. [ 41 ]
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Thus, the local elevators can be stacked within the same elevator shaft. [78] Located on the 44th and 78th floors of each tower, the sky lobbies enabled the elevators to be used efficiently, while also increasing the amount of usable space on each floor from 62 to 75 percent by reducing the number of required elevator shafts. [79]
After a demonstration at the 1853 New York World's Fair, the elevator industry established credibility. [6] Otis elevator in Glasgow, Scotland, imported from the U.S. in 1856 for Gardner's Warehouse, the oldest cast-iron fronted building in the British Isles [7] Otis founded the Otis Elevator Company in Yonkers, New York, in 1853. When he died ...
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