David: Question: What piece of hardware is named after a device carried by medieval knights?
(c) Snipe hinge
Answer: (b) Escutcheon
In furnituremaking, an escutcheon is a small, applied plate or insert that protects a keyhole opening from damage. The term probably derives from heraldry, where an escutcheon was a shield or plaque that depicted a knight's coat of arms. If you think of the end of a key as being the equivalent of a lance, it makes sense!