safety stop

noun

: 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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