In addition to rotating the main chain loops, the electric motor in an escalator also moves the handrails. A handrail is simply a rubber conveyer belt that is looped around a series of wheels. This belt is precisely configured so that it moves at exactly the same speed as the steps, to give riders some stability.
Kilde:
http://science.howstuffworks.com/escalator1.htm
/thread
[EDIT:] Kan det tenkes at NOEN modeller av rulletrapper har håndtak som går raskere enn i de vaneligste modellene?
Sist endret av Turbolego; 8. juni 2010 kl. 13:52.