--- title: Escalators and lifts — a lesson of Mova's school · trees and pragmatics description: «Escalators and lifts», a lesson of the technology course of Mova's primary school, sentence by sentence with dependency trees and pragmatics. It begins: An escalator is a loop of steps on a chain, pulled round and round by a motor. --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/technology/26-escalators-and-lifts/) [home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [school](https://md.mova.elamur.ai/free/en/corpora/school/) / [Technology](https://md.mova.elamur.ai/free/en/corpora/school/technology/) / Escalators and lifts # Escalators and lifts Lesson 26 of the technology course of Mova's primary school: 21 sentences, each with its syntax tree and pragmatics. The lessons are written for Mova, and their agreed trees are part of Mova corpus 0.4 (CC BY-SA 4.0). How Mova does on its tests: [the lesson at school](https://md.mova.elamur.ai/free/en/school-run/technology/26-escalators-and-lifts/). - [0](https://md.mova.elamur.ai/free/en/corpora/school/technology/26-escalators-and-lifts/0/) — An escalator is a loop of steps on a chain, pulled round and round by a motor. - [1](https://md.mova.elamur.ai/free/en/corpora/school/technology/26-escalators-and-lifts/1/) — At the top and bottom the steps flatten out so you can step on and off, then they slide under the floor, turn over and travel back underneath you. - [2](https://md.mova.elamur.ai/free/en/corpora/school/technology/26-escalators-and-lifts/2/) — A lift is a box on strong cables that run over a wheel at the top of the building. - [3](https://md.mova.elamur.ai/free/en/corpora/school/technology/26-escalators-and-lifts/3/) — On the other end hangs a heavy counterweight, so the motor only has to lift the difference, a bit like two children balancing on a seesaw. - [4](https://md.mova.elamur.ai/free/en/corpora/school/technology/26-escalators-and-lifts/4/) — In the shopping centre, look down at the sides of the escalator steps: there are bristly brushes there. - [5](https://md.mova.elamur.ai/free/en/corpora/school/technology/26-escalators-and-lifts/5/) — They are not for cleaning shoes; they gently remind your feet to keep away from the gap, where laces, soft wellies and long scarves can be caught. - [6](https://md.mova.elamur.ai/free/en/corpora/school/technology/26-escalators-and-lifts/6/) — All these machines have safety parts you rarely notice: brakes that grip the rails if a cable ever fails, light beams that stop doors closing on you, and alarm buttons that call real people. - [7](https://md.mova.elamur.ai/free/en/corpora/school/technology/26-escalators-and-lifts/7/) — An escalator is a loop of steps on a chain pulled by a motor; the steps flatten at the top and bottom, and the handrail moves at the same speed as the steps. - [8](https://md.mova.elamur.ai/free/en/corpora/school/technology/26-escalators-and-lifts/8/) — On an escalator, stand still, hold the handrail, keep feet in the middle, tie your laces, keep scarves and long clothes away from the edges, and step off at the top; never sit, play or run on it. - [9](https://md.mova.elamur.ai/free/en/corpora/school/technology/26-escalators-and-lifts/9/) — Every escalator has an emergency stop button at the top and the bottom. - [10](https://md.mova.elamur.ai/free/en/corpora/school/technology/26-escalators-and-lifts/10/) — The side brushes remind you to keep your feet away from the gap, and the comb plate at the end guides the teeth of the steps safely under the floor. - [11](https://md.mova.elamur.ai/free/en/corpora/school/technology/26-escalators-and-lifts/11/) — A lift car is pulled by cables over a pulley with a heavy counterweight on the other side, and strong safety brakes grip the rails if a cable ever fails. - [12](https://md.mova.elamur.ai/free/en/corpora/school/technology/26-escalators-and-lifts/12/) — Elisha Otis showed the first lift safety brake in 1854 by having the rope cut while he stood on the raised platform; it did not fall. - [13](https://md.mova.elamur.ai/free/en/corpora/school/technology/26-escalators-and-lifts/13/) — Lift doors use sensors, often a curtain of invisible light beams, or a rubber edge, to open again if something is in the way; never stop the doors with hands or feet, wait for the next lift. - [15](https://md.mova.elamur.ai/free/en/corpora/school/technology/26-escalators-and-lifts/15/) — The air will not run out, because lifts are not airtight. - [16](https://md.mova.elamur.ai/free/en/corpora/school/technology/26-escalators-and-lifts/16/) — A moving walkway is a flat belt without steps, often at airports; watch for the end, where it warns you. - [17](https://md.mova.elamur.ai/free/en/corpora/school/technology/26-escalators-and-lifts/17/) — Skyscraper lifts move several metres a second, and the fastest in the world travel at around 20 metres a second. - [18](https://md.mova.elamur.ai/free/en/corpora/school/technology/26-escalators-and-lifts/18/) — Ramps and wheelchair lifts let people who cannot use stairs get in, and many buses kneel down at the stop by lowering their suspension, the springs between the wheels and the body. - [19](https://md.mova.elamur.ai/free/en/corpora/school/technology/26-escalators-and-lifts/19/) — A paternoster is an old kind of lift that never stops: open cabins go round in a loop and people step on and off as a cabin slowly passes; a few still work in Germany and the Czech Republic. - [20](https://md.mova.elamur.ai/free/en/corpora/school/technology/26-escalators-and-lifts/20/) — A stair lift is a seat on a rail driven by a small motor and battery, so it still works in a power cut; its rail is made to fit the stairs, even round corners. - [21](https://md.mova.elamur.ai/free/en/corpora/school/technology/26-escalators-and-lifts/21/) — It is not a toy. - ← previous: [Bicycles and other wheels](https://md.mova.elamur.ai/free/en/corpora/school/technology/25-bicycles-and-other-wheels/) - next →: [Road and railway safety](https://md.mova.elamur.ai/free/en/corpora/school/technology/27-road-and-railway-safety/) - ↑ back to [Technology](https://md.mova.elamur.ai/free/en/corpora/school/technology/)