lever tumbler

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Noun1.lever tumbler - a flat metal tumbler in a lever lock
lever lock - a lock whose tumblers are levers that must be raised to a given position so that the bolt can move
tumbler - a movable obstruction in a lock that must be adjusted to a given position (as by a key) before the bolt can be thrown
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series fa-80 deadlocks are lever tumbler, mechanical locks designed for use on swinging cell doors and twenty (20) folger adamns fapara cut keys.
The five mechanical types of key-operated locks are pin tumbler, lever tumbler, disc tumbler, warded and combination locks.
Another lever tumbler lock was patented by Englishman Jeremiah Chubb in 1818.