(n.) 1. A locking device, other than
the primary lock, used to maintain the
safe in a locked condition.
(v.) 2. To insecurely close a safe or
vault door without scrambling the combination,
even though the door may not be opened
by simply turning or pulling the handle.
Source: Lock Industry Standards and Training
(LIST) Council
Dead Pin
(n.) An immovable pin in a tubular lock
which functions as a ward.
Source: Lock Industry Standards and Training
(LIST) Council
Deadbolt, Dead Bolt
(n.) 1. A bolt on a lock that is moved
by turning the key or knob without activation
of a spring.
(n.) 2. The part of a lock that is engaged
or withdrawn with a key.
Source: Dictionary.com
(n.) A bolt, which requires a deliberate
action to extend, and which resists end
pressure in the unlocking direction when
fully extended.
Source: Lock Industry Standards and Training
(LIST) Council
Deadlatch
(n.) A kind of latch whose bolt may be
so locked by a detent that it can not
be opened from the inside by the handle,
or from the outside by the latch key.
Source: Dictionary.com
Deadlock
(n.) A lock which incorporates a deadbolt.
Source: Lock Industry Standards and Training
(LIST) Council
Deadlocking
(adj.) Pertaining to any feature which,
when fully engaged, resists attempts
to move the latch or bolt in the unlocking
direction through direct pressure.
Source: Lock Industry Standards and Training
(LIST) Council
Deadlocking Latch
(n.) A latchbolt with a deadlocking mechanism.
Source: Lock Industry Standards and Training
(LIST) Council
Declining Step Key
(n.) A key whose cuts are equal or deeper
as you proceed from bow to tip.
Source: Lock Industry Standards and Training
(LIST) Council
Deco Key Finish
(n.) Any design embossed or imprinted
on a key to give it an aesthetic appearance.
Source: Lock Industry Standards and Training
(LIST) Council
Decode
(v.) To determine a key combination by
physical measurement of a key and/or
cylinder parts.
Source: Lock Industry Standards and Training
(LIST) Council
Decoder Gauge
(n.) A measuring device which helps determine
the combination of a lock or cylinder
without removing the tumblers.
Source: Lock Industry Standards and Training
(LIST) Council
Deflector Cover
(n.) A removable shield designed to prevent
pin point drilling on a safe.
Source: Lock Industry Standards and Training
(LIST) Council
Degree Of Rotation
(n.) A specification for the angle at
which a cut is made into a key blade
as referenced from the perpendicular;
e.g., right (R or 2), left (L or 1) or
center (= perpendicular) (C). This specification
is typically used for some high security
keys.
Source: Lock Industry Standards and Training
(LIST) Council
Delamination
(v.) The process on older laminated door
safes of having to remove some layers
of the lamination to allow access to
the lock.
Source: Lock Industry Standards and Training
(LIST) Council
Delayed Action Timer
(n.) A secondary device which prevents
movement of a bolt or boltworks until
a set amount of time has elapsed. The
device is normally set or activated as
part of the unlocking process.
Source: Lock Industry Standards and Training
(LIST) Council
Department Master Key
(n.) A master key which operates all
or most master keyed locks of a given
department.
Source: Lock Industry Standards and Training
(LIST) Council
Depth Key Set
(n.) A set of keys used to make a code
original key on a key duplicating machine
to a lock manufacturer's given set of
key bitting specifications. Each key
is cut with the correct spacing to one
depth only in all bitting positions,
with one key for each depth.
Source: Lock Industry Standards and Training
(LIST) Council
Derived Series
(n.) A series of blind codes and bittings
which are directly related to those of
another bitting list.
Source: Lock Industry Standards and Training
(LIST) Council
Detector Lever
(n.) A lever tumbler with an extra gate
that, when elevated beyond the bolt fence,
accepts a latching fence to prevent further
movement of the tumbler.
Source: Lock Industry Standards and Training
(LIST) Council
Detector Lock
(n.) A lock containing a contrivance
for showing whether it has been tampered
with.
Source: Dictionary.com
(n.) A lock that incorporates a detector
lever in its mechanism.
Source: Lock Industry Standards and Training
(LIST) Council
Detention Lock
(n.) A lock designed for securing a cell
or other area in a prison or jail.
Source: Lock Industry Standards and Training
(LIST) Council
DHI
(abb.) Door and Hardware Institute
Source: Lock Industry Standards and Training
(LIST) Council
Dial
(n.) 1. The typically rotatable member
of a combination lock that may be used
to differentiate locations on the combination
wheels and cause operation of the lock.
(v.) 2. The act of turning or rotating
a dial.
Source: Lock Industry Standards and Training
(LIST) Council
Dial Insert Lock
(n.) A key operated cylinder used to
lock the dial on a combination lock.
Source: Lock Industry Standards and Training
(LIST) Council
Dial Ring
(n.) An escutcheon for a combination
lock dial.
Source: Lock Industry Standards and Training
(LIST) Council
Dialer
(n.) 1. A device which automatically
places a telephone call to a pre-set
number when activated.
(n.) 2. An electro-mechanical device
which systematically tries different
combinations on a dial operated combination
lock.
Source: Lock Industry Standards and Training
(LIST) Council
Diamond Back
(adj.) Pertaining to a rim cabinet lock
whose mounting flanges and case forms
the general shape of a diamond.
Source: Lock Industry Standards and Training
(LIST) Council
Diamond Pick
(n.) A tumbler manipulation device with
a triangular protrusion at its tip.
Source: Lock Industry Standards and Training
(LIST) Council
Digital Dial
(n.) A rotatable dial that causes a separate
readable index, (typically digital),
to change.
Source: Lock Industry Standards and Training
(LIST) Council
Digital Dialer
(n.) A telephone communication device
that dials a programmed telephone number,
and transmits, via tones or pulses, one
or more signals to a digital receiver.
Source: Lock Industry Standards and Training
(LIST) Council
Dimple
(n.) A key cut in a dimple key.
Source: Lock Industry Standards and Training
(LIST) Council
Dimple Key
(n.) A key whose cuts are drilled or
milled into its blade surfaces. The cuts
normally do not change the blade silhouette.
Source: Lock Industry Standards and Training
(LIST) Council
Direct Code
(n.) A designation assigned to a particular
key which includes the actual combination
of the key.
Source: Lock Industry Standards and Training
(LIST) Council
Direct Drive
(adj.) Of or pertaining to a combination
lock with the drive cam mounted on the
dial's spindle shaft.
Source: Lock Industry Standards and Training
(LIST) Council
Direction Of Rotation
(n.) The direction a combination lock
dial is to be turned when the combination
is worked. It usually is specified as
clockwise (CW) or right (R), or counter
clockwise (CCW) or left (L).
Source: Lock Industry Standards and Training
(LIST) Council
Disc Tumbler
(n.) 1. A flat tumbler which must be
drawn into the cylinder plug by the proper
key so that none of its extremities extends
into the shell.
(n.) 2. A flat, usually rectangular tumbler
with a gate which must be aligned with
a sidebar by the proper key.
Source: Lock Industry Standards and Training
(LIST) Council
Diskette Lock
(n.) A usually key operated device which
blocks access to the drive for a removable
disk.
Source: Lock Industry Standards and Training
(LIST) Council
Display Key
(n.) A special change key in a hotel
master key system which will allow access
to one designated guest room, even if
the lock is in the shut out mode. It
may also act as a shut out key for that
room.
Source: Lock Industry Standards and Training
(LIST) Council
Divided Plug Keyway
(n.) A cylinder plug divided at the keyway
into two parts. Either part may be replaced
to result in a different keyway combination
via different warding for the keyway.
Source: Lock Industry Standards and Training
(LIST) Council
Dog
(v.) 1. To place an exit device in the
holdback mode.
(n.) 2. In marine applications the latch
for a hatch.
Source: Lock Industry Standards and Training
(LIST) Council
Dogging Cylinder
(n.) A key operated cylinder used to
dog an exit device.
Source: Lock Industry Standards and Training
(LIST) Council
Dogging Device
(n.) In an exit device, a mechanism used
to temporarily disable the latch from
locking.
Source: Lock Industry Standards and Training
(LIST) Council
Dogging Key
(n.) A key or tool used to dog an exit
device.
Source: Lock Industry Standards and Training
(LIST) Council
Dogging Screw
(n.) A screw used to dog an exit device.
Source: Lock Industry Standards and Training
(LIST) Council
Door Bumper
(n.) An obstruction installed to prevent
a door or lock from contacting another
object.
Source: Lock Industry Standards and Training
(LIST) Council
Door Closer
(n.) A device designed to regulate the
closing of a door automatically by various
means.
Source: Lock Industry Standards and Training
(LIST) Council
Door Control
(n.) Any device which controls the opening,
closing or position of a door.
Source: Lock Industry Standards and Training
(LIST) Council
Door Holder
(n.) Any device designed to maintain
a door in the open position.
Source: Lock Industry Standards and Training
(LIST) Council
Door Lug
(n.) A non-movable projection on a safe
door that helps keep the door in the
locked position.
Source: Lock Industry Standards and Training
(LIST) Council
Door Puller
(n.) A tool designed to open a safe deposit
box by forcibly pulling the door and
breaking the lock.
Source: Lock Industry Standards and Training
(LIST) Council
Door Silencer
(n.) A bumper installed in the jamb stop
to quiet the closing of a door.
Source: Lock Industry Standards and Training
(LIST) Council
Door Swing
(adj.) The direction and degree to which
a door opens, as LH 90º, RH 180º,
etc.
Source: Lock Industry Standards and Training
(LIST) Council
Door Viewer
(n.) A device with one or more lenses,
mounted in a door at eye level, which
allows a limited view through a door.
Source: Lock Industry Standards and Training
(LIST) Council
Double Bitted Key
(n.) A key typically bitted on two opposite
surfaces.
Source: Lock Industry Standards and Training
(LIST) Council
Double Cut
(n.) Two bittings for the same tumbler
position.
Source: Lock Industry Standards and Training
(LIST) Council
(adj.) Pertaining to a lock with two
keyed cylinders.
Source: Lock Industry Standards and Training
(LIST) Council
Double Cylinder Deadlock
(n.) A deadbolt lock whose bolt may be
operated by a key from either side.
Source: Lock Industry Standards and Training
(LIST) Council
Double D
(n.) 1. A shape consisting of two opposing
arcs and two opposing flats.
(adj.) 2. Having such a shape.
Source: Lock Industry Standards and Training
(LIST) Council
Double D Punch
(n.) A tool used to make a double D hole.
Source: Lock Industry Standards and Training
(LIST) Council
Double Horn
(adj.) Of or pertaining to a safe deposit
type lock which requires two separate
holes through the door.
Source: Lock Industry Standards and Training
(LIST) Council
Double Locking
(adj.) Of or pertaining to a lock with
one or more bolts with different functions,
typically a latch and a deadbolt.
Source: Lock Industry Standards and Training
(LIST) Council
Double Pin
(v.) To place more than one master pin
in a single pin chamber.
Source: Lock Industry Standards and Training
(LIST) Council
Double Throw Bolt
(n.) A deadbolt that has two distinct
extended positions, both of which are
deadlocked.
Source: Lock Industry Standards and Training
(LIST) Council
Double-Acting Closer
(n.) A door closer designed to be used
on a double-acting door.
Source: Lock Industry Standards and Training
(LIST) Council
Double-Acting Door
(adj.) A door that may be pushed open
from either side.
Source: Lock Industry Standards and Training
(LIST) Council
Double-Acting Hinge
(n.) A hinge which permits movement of
a door in either direction from the closed
position.
Source: Lock Industry Standards and Training
(LIST) Council
Double-Acting Lever Tumbler
(n.) One that must be lifted a precise
amount, neither too little nor too much
to allow movement of a bolt.
Source: Lock Industry Standards and Training
(LIST) Council
Draw Sheet
(n.) A page with a completed matrix of
potential combinations used in Matrix
Format Master Keying.
Source: Lock Industry Standards and Training
(LIST) Council
Drawback Latch/Lock
(n.) A latch/lock whose latch is disengaged
by pushing or pulling an actuator toward
the hinge side of the jamb.
Source: Lock Industry Standards and Training
(LIST) Council
Drill Point
(n.) The exact measurement of the location
used to drill a locked up container to
effect an opening.
Source: Lock Industry Standards and Training
(LIST) Council
Drive Cam
(n.) The first wheel rotated by a dial
or key that has an opening designed to
allow the fence, lever, or tailbar to
enter and facilitate in opening of the
lock or safe.
Source: Lock Industry Standards and Training
(LIST) Council
Drive In
(adj.) Pertaining to a latch or bolt
with a round face.
Source: Lock Industry Standards and Training
(LIST) Council
Driver Spring
(n.) A spring placed on top of the pin
stack to exert pressure on the pin tumblers.
Source: Lock Industry Standards and Training
(LIST) Council
Drop
(n.) A pivoting or swinging dust cover.
Source: Lock Industry Standards and Training
(LIST) Council
(n.) A lock with an interlocking bolt
which moves vertically and may enter
loops on the strike.
Source: Lock Industry Standards and Training
(LIST) Council
Drop In
(n.) The gate area of the drive cam where
the lever nose drops into. Usually identified
with a corresponding number on the dial.
Source: Lock Industry Standards and Training
(LIST) Council
Drop Ring
(n.) A looped handle which can pivot,
typically recessed and falls flush with
the door face when not in use.
Source: Lock Industry Standards and Training
(LIST) Council
Drop-In Point
(n.) The location in a combination lock
where the wheel gates are aligned with
the fence.
Source: Lock Industry Standards and Training
(LIST) Council
Dual Custody
(n.) 1. A function designed to require
the presence of two persons with two
different keys, combinations or codes
to operate the same device.
(adj.) 2. Pertaining to such a function.
Source: Lock Industry Standards and Training
(LIST) Council
Dual Locking Cylinder
(n.) A style of lock cylinder whose key
operates two independent locking mechanisms
within the cylinder.
Source: Lock Industry Standards and Training
(LIST) Council
Dumb Card
(n.) An authorization credential that
presents recorded data only.
Source: Lock Industry Standards and Training
(LIST) Council
Dumb Reader
(n.) An access control interrogation
device that can only relay data to a
controller.
Source: Lock Industry Standards and Training
(LIST) Council
Dumbbell Pin
(n.) A spool pin with serrations at the
larger diameter ends.
Source: Lock Industry Standards and Training
(LIST) Council
Dummy
(adj.) Pertaining to any type of non-active
device applied for aesthetic purposes.
Source: Lock Industry Standards and Training
(LIST) Council
Dummy Cylinder
(n.) A non-functional facsimile of a
rim or mortise cylinder used for appearance
only, usually to conceal a cylinder hole.
Source: Lock Industry Standards and Training
(LIST) Council
Dummy Trim
(n.) Non active trim applied for aesthetic
purposes.
Source: Lock Industry Standards and Training
(LIST) Council
Duplex
(n.) An early trade name used by Yale
for locks which offer the functionality
of master keying by incorporating two
cylinders on the same side of the door,
or two keyways in a lever tumbler lock.
One keyway is for the change key and
the other keyway is for the 'master key'.
Source: Lock Industry Standards and Training
(LIST) Council
Duplicate
(v.) To copy.
Source: Lock Industry Standards and Training
(LIST) Council
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