Lever tumbler lock

A lock in which a key raises pivoting levers until their gates align, allowing a bolt to move. Its security depends on the key lifting each lever to the correct height.

Lever: A rigid bar that pivots around a fixed point to transmit force or movement. Each tumbler pivots as the key lifts it toward the height that aligns its gate.
Tumbler lock: A lock whose operation depends on movable internal components being placed in a required configuration. The lever tumbler is one family of locks that use movable tumblers.
Pin tumbler lock: A lock in which a key raises pairs of pins until their boundaries align at the shear line. It also depends on precise key heights, but uses vertical pins instead of pivoting levers.
Chubb detector lock: A lever lock that signals or resists manipulation when its levers are lifted beyond their proper positions. It adds an anti-manipulation response to the lever mechanism.
Lock bolt: A sliding or pivoting component that secures a door or other closure. The bolt can move only when the aligned lever gates clear its path.
Gate (lock mechanism): A notch or opening in a lock component that permits another part to pass when aligned. Each lever's gate must line up with the bolt stump.
Wafer tumbler lock: A lock that uses flat sliding wafers, moved by a key, to block or release a plug. Its sliding wafers replace the pivoting levers and gates used here.
Safe lock: A locking mechanism designed to secure a safe against unauthorized opening. Lever mechanisms have been used in safe locks, often with multiple bolts.
Key: A shaped tool that operates a lock by engaging its internal components. Its bit lifts the levers to specific heights as the key turns.
Bolt stump: A projection on a lock bolt that engages tumbler gates to prevent or permit bolt movement. It is the bolt feature that the lever gates obstruct or release.

Linked from 3 pages