Definition of safety stop
: any of various devices to stop an undesirable motion or action: such as a : an attachment for an elevator to prevent accidental falling b : a device that closes a supply valve and stops an engine in case of accident to the governor belt c : a contrivance to prevent a pulley tackle from overhauling d : a device in a lathe to prevent a carriage from colliding with the headstock e : a system for stopping trains automatically if they try to pass a stop signal f : a stop motion for textile machinery
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