What safety mechanism is activated if an elevator descends too quickly?

The speed governor is a crucial safety mechanism in elevators designed to ensure safe operation. It continuously monitors the speed of the elevator's descent, and if the elevator begins to descend too quickly, the speed governor activates. This system works by engaging the elevator's braking system to halt or slow down the elevator before it reaches the ground level or any other lower floor.

In the context of elevator safety, the speed governor acts as a fail-safe, preventing free falls that could result from mechanical failures or other issues. Its activation is vital for the protection of passengers and the overall integrity of the elevator system. While the emergency braking system also plays a role in stopping an elevator, it is the speed governor that specifically addresses issues related to rapid descent.