safety catch

noun

a device used in mechanisms, as for elevators, to prevent falling in the event of mechanical failure.

safety (def 4).

Origin

1875-80

Examples from the web for safety catch

Calmly he aimed his rifle at the congregation, switched the safety catch to automatic fire, and pulled the trigger.
Plug the electrical cord into the trailer and fasten the safety catch.
The tank lids must lock open with a positive safety catch.
If not available, improvise by inserting a screwdriver into the well and depressing the safety catch.
On the back is a pin, without safety catch, for fastening the badge.
To raise, place in desired location and open ladder, engaging safety catch.
Tie downs for wheelchairs are to consist of a leverage lock with a safety catch requiring physical unlatching.
Using the cup holder, lower the locking handle, ensuring that the safety catch engages.
safety catch shall be provided to prevent battery tray from sliding against battery door while bus is in motion.
Open hood and inspect safety catch for proper operation.

British Dictionary definitions for safety catch

noun

a device to prevent the accidental operation of a mechanism, e.g. in a firearm or lift