locking plate

American  

noun

Horology.

1. a narrow wheel geared to a striking train or other mechanism and having a notched rim engaging with another mechanism permitting it to rotate through a specific arc.

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Etymology

Origin of locking plate

First recorded in 1875–80

Example Sentences

Previously, to ensure each locking plate was secure at every point, a quality inspector would have checked Zabel’s work.

From Seattle Times

As JerryRigEverything's video clearly shows, replacing a damaged screen assembly on a Nokia 6 is incredibly easy — simply heat up and remove the display assembly, unscrew a locking plate and unplug the connector, then install the new screen.

From Time

The magnet pulls a locking plate away from the mechanism, allowing the door handle or knob to turn freely.

From New York Times

Bend the locking plate over and recheck that the inner hub and basket spin independently of each other.

From Time Magazine Archive

The key is automatically held in this intermediate position by locking plate 3 until this plate is actuated by the operation of another button which releases the key so that it assumes its normal position as shown in the left-hand cut.

From Project Gutenberg