Architectural Glossary

The following glossary of lock and door closer terms is provided to enable each product description in the Architectural section to be fully comprehended.

Auxiliary Bolt
An additional bolt which is activated by the strike when the door is closed, automatically deadlatching the latchbolt against end pressure.
The feature of a door closer unit that prevents shock and possible damage when the door is forcibly opened. Provides a softening effect on the opening of the door.
Box Strike
A strike in which the bolt recess is enclosed or boxed, thus covering the opening in the jamb.
A bolt which is not activated by a spring. When locked, the bolt cannot be returned by end pressure.
A lock containing a deadlatch bolt.
Deadlatch Bolt
A spring actuated bevelled latchbolt with operates in conjunction with an auxiliary bolt which automatically locks the latchbolt against return by end pressure.
A lock incorporating a deadbolt.
Deadlocking Latch
A lock incorporating a deadlocking latchbolt.
Deadlocking Latchbolt
A latchbolt which when the door is closed, can be locked against return by end pressure by operation of a key or turnbutton.
Delayed Action
A feature of a door closer which holds the door in the open position for a number of seconds before the closing action commences. This feature is ideal for use by the handicapped, the aged and people with prams, trolleys etc. The SAA Fire Door Code approves the use of delayed action closers on fire doors.
Dummy Trim
A non-operating door trim which is installed for appearance or as a door pull only.
Electric Strike
An electrical device that replaces a regular lock strike to enable a door to be released by remote control.
Emergency Key
A key supplied with Hotel-Motel locks. These locks have a feature which, when applied, prevents entry by normal service keys, master keys or grand master keys. At all times entry can be gained by the emergency key which suits those groups of locks.
Grand Master Key
A key within a system that operates all locks in a number of separate groups which have their own master key.
A product designed or assembled for use only on right hand doors, or only on left hand doors, but not both.
The feature of a door closer unit which enables a door to be held in the opened position until released.
A snib, button or other device which can hold the bolt in the retracted position.
Maison Key System
A keying system where a group of different keys will operate a common lock.
Master Key
A key which will operate a group of locks, where each lock is generally keyed to differ.
An opening made to receive a lock or other hardware. Also the act of making such an opening.
Mortice Lock
A lock designed to be recessed into the edge of a door, rather than being mounted to its surface.
A rim mortice lock, with a spring actuated latchbolt, operated by key or turnbutton.
Passage Set
A latchset with knobs or levers on both sides of a door but no locking function.
Patio Lock
A lock designed with a pushbutton or turnbutton inside to lock the outside knob or lever. When locked, there is no entrance from outside.
Privacy Set
A lock used on bathroom and bedroom doors having an inside button or turnbutton to lock the knob or lever with an emergency function which will unlock the set from the outside.
Project Keying
Systems used to allow contractors to gain entry to a building during construction but to prevent entry by the same contractors after the building has been occupied or handed over.
Rebated Door
A door where the leading edge is stepped.
Reversible Lock
A lock with components that can be readily adapted to enable the lock to suit doors of either hand, opening in or out.
Single-Action Escape Lock
A lockset installed to a door where exit is obtained by a single action without the use of a key.
A device fixed in or on a door jamb into which the lock or latchbolt engages when the door is closed.
Tubular Bolt
A bolt having a tubular case.
Tubular Lock
One having a tubular shaped case and requiring bored (round) holes rather than a chiselled rectangular mortice.
A component of a lock or cylinder which prevents operation of the lock mechanism except by insertion of the correct key. Tumblers may take the form of pins, discs, levers, bars, wafers or detainers.
Vestibule Lock
Latching featured lock where the inside handle is always free for single action escape.
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