self-stopping tool
nounUK /ˌself ˈstɒpɪŋ tuːl/
US /ˌself ˈstɑːpɪŋ tuːl/
A self-stopping tool is a tool that stops working by itself when it is done or when something goes wrong.
The drill is a self-stopping tool, so it turns off as soon as it gets too hot.
OTHER MEANINGS
2. A software utility that ends its own process when a task finishes or an error occurs.
The backup script is a self-stopping tool that closes itself after the files are copied.
3. A device with a built-in brake or clutch that halts motion without a person acting.
The conveyor uses a self-stopping tool to halt the belt when a worker steps too close.
4. A teaching aid that ends an activity automatically once the learner reaches the goal.
The reading app acts as a self-stopping tool and stops the lesson when the child finishes the story.