Door handle
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A door handle or doorknob is a handle used to open or close a door. Door handles can be found on all types of doors including: exterior doors of residential and commercial buildings, internal doors, c
A door handle designed by Ludwig Wittgenstein in Haus Wittgenstein, Vienna (1927)
Door handle of Napoleon's coronation coach by Jean-Ernest-Auguste Getting (c. 1804)
A Schlage Tulip doorknob with an escutcheon plate tight against the door
Recessed pocket door handle
Latch
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A latch or catch is a type of mechanical fastener that joins two or more objects or surfaces while allowing for their regular separation. A latch typically engages another piece of hardware on the oth
Door handle
…which the spindle is connected. Pushing the lever or turning the knob pulls the cylinder in the direction of the turn. The end of the cylinder is the "latch bolt" (more simply known as the "latch"), which protrudes into a space carved out of the door frame, and which prevents the door from being opened if the…
Knob has crescent-shaped bar which pulls back latch bolt when turned. Version on upper right has a lock; version on upper left does not. Kwikset uses this shape. Other companies have square or D-shaped bars.
Electronic cam lock
Norfolk latch, circa 1939
A wooden crossbar on a door