Latches and Locksets

• Mortise lock or latch – is installed in a rectangular area cut out of the door
• Preassembled lock and latch – also called unit lock. Is a complete unit slid into a notch made in the edge of the door and requires very little adjustment.
• Bored lock and latch – also called cylindrical lock. Is installed by boring holes through the face of the door and from the edge of the door to the other bored opening.
• Interconnected lock – have a cylindrical lock and a dead bolt. The two locks are interconnected so that a single action of turning a knob or lever handle on the inside releases both bolts.
• Knob – a handle, more or less spherical, usuallyfor operating a lock.
• Knob rose – a round disk or plate fastened to the face of a door around the hole in the door through which the doorknob spindle passes.
• Escutcheon – a protective plate surrounding the keyhole of a door, a light switch, etc.; also called a scutcheon.
• Strike, strike plate, striking plate – a metal plate or box which is set in a doorjamb and is either pierced or recessed to receive the bolt or latchof a lock, fixed on a door.
• Lip strike – the projection from the side of a strike plate which the bolt of a lock strikes first, when a door is closed