How escalator safety mechanisms work and why they cause machines to stop
Briefly

How escalator safety mechanisms work  and why they cause machines to stop
""All I got from the United Nations was an escalator that on the way up stopped right in the middle,""
""If someone at the U.N. intentionally stopped the escalator as the President and First Lady were stepping on, they need to be fired and investigated immediately.""
""The safety mechanism is designed to prevent people or objects accidentally being caught and stuck in or pulled into the gearing,""
""An escalator should not break down, as long as it's being maintained properly. But however, there are many safety micro switches in the entire unit that would stop the escalator in certain circumstances, and that's how they are designed."
An escalator at the United Nations halted while President Trump and first lady Melania Trump stepped onto it, causing a brief pause as the first lady walked up the steps. President Trump joked that the escalator stopped in the middle and later called the incident "sabotage." A White House post on X demanded that anyone who intentionally stopped the escalator be fired and investigated. U.N. officials attributed the stoppage to a White House videographer possibly triggering a comb-step safety feature designed to prevent people or objects from being caught in the gearing, and a technician reset the escalator after the delegation reached the second floor. Escalator experts note multiple micro-switches exist to stop units when necessary.
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