Double-handled lock :

Lock whose key has a solid shank and which opens both from the interior and exterior.

Espagnolette :

Lock that uses rods to close doors or hinged windows, so-called, it is said, because of its Spanish origins...

Hasp :

Flat moving piece whose hinge is fixed to the lid of the chest or trunk and whose lock hook is held down by the bolt when locked.

Key plate :

Carved or chiselled plate around the keyhole. Sometimes called an 'escutcheon'.

Knob :

Sliding knob that pushes the bolt from just one side (16th Century). The double knob operates the catch bolt both from the interior and exterior.

Knob of locking bar :

Handle that activates the bolt of a vertical lock (latch).

Latch :

Moving bar on a pivot, which locks a door.

(Latch) bolt :

Horizontal or vertical bolt which is slid into a strike plate.

Lock :

Mechanism of varying levels of complexity, designed to secure doors, wardrobes, chests, drawers, etc., that is made up of three distinct parts: the lock itself, the key and the strike plate.

Lock hook :

Iron hook fixed to the hasp of a chest or trunk lid of. The lock hook fits into a slot and receives the bolt, which locks the chest.