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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.
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Platform screen doors at the Fuda Station, Tokyo, Japan, 2023. Platform screen doors (PSDs), also known as platform edge doors (PEDs), are used at some train, rapid transit and people mover stations to separate the platform from train tracks, as well as on some bus rapid transit, tram and light rail systems.
When the IRT modified existing cars and ordered new cars with a middle door, gap fillers were needed because the middle door was not near the platform. After the City of New York bought the IRT in 1940, new car designs (starting with the R12 ) had the end doors away from the extreme ends of the car body, which also required the use of gap ...
In 2001, due to a dated design flaw, 8-year-old Tucker Smith from Bel Air, Maryland was crushed to death by an Otis Elevator after becoming trapped in the gap between the outside door and the inside gate. [36] On August 14, 2002, Neil Raymond Ricco tripped while exiting an Otis Elevator while working at a Comerica Bank building in San Diego. He ...
cost index CID Customer induced damage C/L Centre line CL checklist: A flight deck manual, usually part of a Quick Reference Handbook: CLR Clear Seen on GFA and is used for sky coverage CMC central maintenance computer CMM component maintenance manual CMO Certificate Management Office: FAA CMV converted meteorological visibility: CMPA
window detector circuit diagram. A window detector circuit, also called window comparator circuit or dual edge limit detector circuits is used to determine whether an unknown input is between two precise reference threshold voltages. [1] It employs two comparators to detect over-voltage or under-voltage. [2]
The early skyscrapers used heavy plumb bobs, hung on wire in their elevator shafts. [ further explanation needed ] A plumb bob may be in a container of water (when conditions are above freezing temperatures), molasses, very viscous oils or other liquids to dampen any swinging movement, [ 4 ] functioning as a shock absorber .