What is the main function of the car overspeed governor?

The car overspeed governor plays a critical role in elevator safety by mechanically tripping the car safety device if the elevator's speed exceeds a predetermined threshold. This is essential because if an elevator ascends or descends too quickly, it can pose serious risks to passengers. The governor detects excessive speed and activates a gripping mechanism that engages with the elevator's suspension system to halt the car safely.

This function is integral to maintaining safe operating conditions and ensuring that the elevator can respond to potentially dangerous situations, effectively preventing accidents or malfunctions that could lead to harm. The prompt and automatic response of the overspeed governor is what makes it an essential component of elevator safety systems.