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Treadle
01
脚踏板, 脚踏杠
a lever that is operated with the foot
02
踏板, 踏板开关
a mechanical device activated by the weight or movement of a train's wheels, typically used to trigger signals or track switches
What is a "treadle"?
A treadle is a device often used in railway signaling that is activated by pressure, typically from the weight of a train passing over it. When a train's wheels press down on the treadle, it triggers a mechanical signal or system, such as changing the position of a track switch or activating a warning signal. Treadles are commonly found in places where automatic track changes or alerts are needed, helping to manage train movements and improve safety without requiring manual intervention. They are usually placed in strategic locations along the track to ensure proper functioning of signaling equipment.
Example
Treadles are strategically placed along the railway tracks to detect the presence of trains and facilitate safe operations.
When a train passes over a treadle, it sends a signal to the control center, informing them of the train's location and direction.
