The following glossary of lock
and door closer terms is provided to enable each product description in
the Architectural section to be fully comprehended.
An additional bolt whihc 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.
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.
A spring actuated beveleed latchbolt with operates in conjunction
with an auxiliary bolt which automatically locks the latchbolt against
return by end pressure.
A lock incorporating a deadbolt.
A lock incorporating a 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.
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.
A non-operating door trim which is installed for appearance or as
a door pull only.
An electrical device that replaces a regular lock strike to enable
a door to be released by remote control.
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 suit 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
Maison Key System
A keying system where a group of different keys will operate a common
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.
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.
A latchset with knobs or levers on both sides of a door but no locking
A lock designed with a pushbutton or turnbutton inside to lock the
outside knob or lever with an emergency function which will unlock the
set from the outside.
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.
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.
A door where the leading edge is stepped.
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.
A bolt having a tubular case.
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.
Latching featured lock where the inside handle is always free for
single action escape.