Mounted in a cavity in the door edge; when the mechanism is in the locked position, the bolt protrudes from the lock into a receiver in the jamb (410), Mortise latch and lock, Equipped with a latch mechanism that locks and unlocks using both the key and, if present, the knob button (410), Key-in-knob lock, Mounted above the doorknob and may have a single cylinder or double action cylinder (411), Tubular deadbolt lock, Rim lock with a spring-loaded bolt with a beveled edge facing the doorframe allowing the door to lock when it is closed (412), Night latch, Type of rim lock with a rectangular bolt that must be manually retracted before the door can be closed and the bolt engaged with the receiver. If the bolt is extended, the door cannot be closed. (412), Deadbolt, Consists of a frame-mounted plate with a shaft and knob and a hinged U-shaped shackle that mounts on the door and restricts the opening of the door (413), Door limiter, Flush bolts are installed in the edge of one side of a set of double doors permitting one side to remain locked while the other door is used for entry and exit (413), Internal-mounted bolt

Door Lock Types

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