(n.) A T-shaped handle assembly which
may be lockable.
Source: Lock Industry Standards and Training
(LIST) Council
T-Strike
(n.) A strike whose lip spans the middle
portion (but not the full height) of
the strike.
Source: Lock Industry Standards and Training
(LIST) Council
Tactile
(adj.) Of or pertaining to a knob, lever
or other device to open a door, which
conveys a special sense of touch; typically
used as a warning to the visually impaired
of danger on the other side of the door.
Source: Lock Industry Standards and Training
(LIST) Council
Tailpiece
(n.) An actuator attached to the rear
of the cylinder, parallel to the plug,
typically used on rim, key-in-knob or
special application cylinders.
Source: Lock Industry Standards and Training
(LIST) Council
Talon
(n.) The part of a lever lock bolt that
is relieved to allow the key to enter
and move the bolt.
Source: Lock Industry Standards and Training
(LIST) Council
Tamper Resistant Fastener
(n.) Any one of several screws or nuts
which have a specialized head, requiring
a special-access tool for removal.
Source: Lock Industry Standards and Training
(LIST) Council
Tamper Switch
(n.) A sensor that signals when someone
attempts to access the mechanism of a
security device.
Source: Lock Industry Standards and Training
(LIST) Council
TCP
(abb.) Transmission Control Protocol
Source: Lock Industry Standards and Training
(LIST) Council
TCP/IP
(n.) The system networks use to communicate
with one another.
Source: Lock Industry Standards and Training
(LIST) Council
Telescoping Bolt
(n.) The bolt of a locking device which
extends and retracts by successive overlapping
sections.
Source: Lock Industry Standards and Training
(LIST) Council
Telescoping Column
(n.) A steering column adjustable for
length.
Source: Lock Industry Standards and Training
(LIST) Council
Template
(n.) A pattern used to mark cutout locations
for hardware installation.
Source: Lock Industry Standards and Training
(LIST) Council
Template Hinge
(n.) A hinge with dimensions, hole locations
and tolerances which conform to ANSI
standard A156.7
Source: Lock Industry Standards and Training
(LIST) Council
Tension Wrench
(n.) A tool used to apply torque to a
lock bolt or cylinder plug while attempting
picking.
Source: Lock Industry Standards and Training
(LIST) Council
Theoretical Key Changes
(n. pl.) The total possible number of
different combinations available for
a specific cylinder or lock mechanism.
Source: Lock Industry Standards and Training
(LIST) Council
Thermal Lance
(n.) An instrument, used for cutting
with a pure oxygen feed, that uses itself
and the material being cut as fuel.
Source: Lock Industry Standards and Training
(LIST) Council
Thermal Relocker
(n.) A relocking device which is activated
by heat.
Source: Lock Industry Standards and Training
(LIST) Council
Threaded Rose
(n.) A rose with an internally threaded
ferrule.
Source: Lock Industry Standards and Training
(LIST) Council
Three Column Progression
(n.) A process wherein key bittings are
obtained by using the cut possibilities
in three columns of the key bitting array.
Source: Lock Industry Standards and Training
(LIST) Council
Three Pin Master Key
(n.) A master key for all combinations
obtained by progressing three bitting
positions.
Source: Lock Industry Standards and Training
(LIST) Council
Three Point Latch
(n.) A self-latching device designed
to latch a door at the top, bottom and
edge.
Source: Lock Industry Standards and Training
(LIST) Council
Throat Cut
(n.) The cut made into a key to bypass
a throat ward.
Source: Lock Industry Standards and Training
(LIST) Council
Throat Ward
(n.) An obstruction formed in a lock's
case or horn at the point of key entry,
which prevents key rotation.
Source: Lock Industry Standards and Training
(LIST) Council
Throw
(n.) The distance a bolt or latch projects
from the faceplate or case of a lock
in the extended position.
Source: Lock Industry Standards and Training
(LIST) Council
Throw Member
(n.) An intermediate actuator which engages
the rear of the plug to transfer motion
to a cam, tailpiece or other actuator.
Source: Lock Industry Standards and Training
(LIST) Council
Thumb Cuffs
(n.) Restraints designed to lock on the
thumbs.
Source: Lock Industry Standards and Training
(LIST) Council
Thumb Index
(n.) A projection of metal on a key bow
which serves as a tactile means of orienting
a non reversible key for correct lock
insertion.
Source: Lock Industry Standards and Training
(LIST) Council
Thumb Latch
(n.) A lock with a thumbpiece to actuate
the latch.
Source: Lock Industry Standards and Training
(LIST) Council
Thumb Turn
(n.) A actuator which can be turned by
thumb and forefinger.
Source: Lock Industry Standards and Training
(LIST) Council
Thumb Turn Cylinder
(n.) A cylinder with a turn knob rather
than a keyway and tumbler mechanism.
Source: Lock Industry Standards and Training
(LIST) Council
Thumbpiece
(n.) A generally flat, projecting latch
actuator found above a grip handle and
depressed by the thumb.
Source: Lock Industry Standards and Training
(LIST) Council
Tilt Column
(n.) A steering column design which permits
vertical adjustment of the steering wheel.
Source: Lock Industry Standards and Training
(LIST) Council
Time Delay
(n. and adj.) A feature which prevents
operation until a set amount of time
has elapsed. Activation normally begins
when access, egress or other unlocking
is desired.
Source: Lock Industry Standards and Training
(LIST) Council
Time Delay Lock
(n.) A lock that has a mechanism for
preventing unlocking until a specific
amount of time has passed.
Source: Lock Industry Standards and Training
(LIST) Council
Time Lock
(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 at
the time of locking.
Source: Lock Industry Standards and Training
(LIST) Council
Timing
(n.) The engagement or positioning of
an assembly of internal parts so as to
produce the desired sequence of engagement
during operation.
Source: Lock Industry Standards and Training
(LIST) Council
Tip
(n.) The portion of the key which enters
the keyway first.
Source: Lock Industry Standards and Training
(LIST) Council
Tip Stop
(n.) A type of stop located at or near
the tip of the key.
Source: Lock Industry Standards and Training
(LIST) Council
Tips & Stems
(n.) A key bow and shank that uses a
detachable end with a bit(s) on it.
Source: Lock Industry Standards and Training
(LIST) Council
TL-15
(n.) A U.L. rating given to a container
whose door has been tested against forcible
entry, with common hand tools, for a
period of 15 man minutes.
Source: Lock Industry Standards and Training
(LIST) Council
TL-30
(n.) A U.L. rating given to a container
whose door has been tested against forcible
entry, with common hand tools and/or
abrasive cutting wheels and power saws,
for a period of 30 man minutes.
Source: Lock Industry Standards and Training
(LIST) Council
TMK
(abb.) Top Master Key
Source: Lock Industry Standards and Training
(LIST) Council
Toe (of a Shackle)
(n.) That part of the shackle, which
may be removed from the padlock body.
Source: Lock Industry Standards and Training
(LIST) Council
Toggle
(n.) A pivoting one-piece stop works
activator.
Source: Lock Industry Standards and Training
(LIST) Council
Token
(n.) A self-contained electronic key.
Source: Lock Industry Standards and Training
(LIST) Council
Tolerance
(n.) The deviation allowed from a given
dimension.
Source: Lock Industry Standards and Training
(LIST) Council
Tone Dialer
(n.) A telephone communication device,
normally activated by an alarm, that
uses a series of tones to dial a predetermined
number.
Source: Lock Industry Standards and Training
(LIST) Council
Top Jamb Mount
(n.) Surface application of a door closer
body directly to the header.
Source: Lock Industry Standards and Training
(LIST) Council
Top Master Key
(n.) The highest level master key in
a master key system.
Source: Lock Industry Standards and Training
(LIST) Council
Top of Blade
(n.) The bitted edge of a single bitted
key.
Source: Lock Industry Standards and Training
(LIST) Council
Top Pin
(n.) Usually a cylindrical shaped tumbler,
usually flat on both ends and installed
directly under the spring in the pin
stack.
Source: Lock Industry Standards and Training
(LIST) Council
Total Position Progression
(n.) A process used to obtain key bittings
in a master key system wherein bittings
of change keys differ from those of the
top master key in all bitting positions.
Source: Lock Industry Standards and Training
(LIST) Council
Touch Bar
(n.) A type of exit device actuator which
typically does not pivot and retracts
the bolt with a minimum of pressure.
Source: Lock Industry Standards and Training
(LIST) Council
Touch Pad
(n.) 1. An exit device actuator with
a paddle shape.
(n.) 2. A remote door opener activator,
typically electric or electronic, which
facilitates handicap access.
Source: Lock Industry Standards and Training
(LIST) Council
Track
(n.) The bitting surface of a sidewinder
key.
Source: Lock Industry Standards and Training
(LIST) Council
Trailing Face
(n.) The door face farthest from the
strike side of the jamb when the door
is open.
Source: Lock Industry Standards and Training
(LIST) Council
Transom Catch
(n.) A surface mounted latch, typically
having an actuator operated by a long
pole or an attached pull chain.
Source: Lock Industry Standards and Training
(LIST) Council
Tri Spoke Handle
(n.) A safe handle that has 3 extensions
off the main hub.
Source: Lock Industry Standards and Training
(LIST) Council
Tri-Bolt
(adj.) Referring to a three point locking
system usually found on round door safes.
Source: Lock Industry Standards and Training
(LIST) Council
Trick Lock
(n.) A lock which requires successful
operation of one or more moving panels,
concealed buttons, etc., often in addition
to normal operation by key and/or combination.
Source: Lock Industry Standards and Training
(LIST) Council
Trim
(n.) Exposed components of a lockset
or latchset, which allow operation, enhance
appearance or provide protection.
Source: Lock Industry Standards and Training
(LIST) Council
Trim Panel
(n.) The decorative and functional assembly,
which covers the inside surface of a
vehicle, door.
Source: Lock Industry Standards and Training
(LIST) Council
Triplex Spindle
(n.) A spindle with three wedge shaped
bars which spread to grip the inside
of the knob shank when the knob set screw
is tightened.
Source: Lock Industry Standards and Training
(LIST) Council
TRTL-15x6
(n.) A U.L. rating given to a container
when it has been tested against forcible
entry, on all six sides, with common
hand tools and/or abrasive cutting wheels,
power saws, and oxy-fuel gas cutting
or welding torch for a period of 15 man
minutes.
Source: Lock Industry Standards and Training
(LIST) Council
TRTL-30
(n.) A U.L. rating given to a container
where the door has been tested against
forcible entry with common hand tools
and/or abrasive cutting wheels, power
saws, and oxy-fuel gas cutting or welding
torch for a period of 30 man minutes.
Source: Lock Industry Standards and Training
(LIST) Council
TRTL-30x6
(n.) A U.L. rating given to a container
when it has been tested against forcible
entry, on all six sides, with common
hand tools and/or abrasive cutting wheels,
power saws, and oxy-fuel gas cutting
or welding torch for a period of 30 man
minutes.
Source: Lock Industry Standards and Training
(LIST) Council
TRTL-60
(n.) A U.L. rating given to a container
where the door has been tested against
forcible entry with common hand tools
and/or abrasive cutting wheels, power
saws, and oxy-fuel gas cutting or welding
torch for a period of 60 man minutes.
Source: Lock Industry Standards and Training
(LIST) Council
Trunk Lock
(n.) 1. A hinged strap with a staple
or a lock at the end that mates with
a receptacle in the trunk.
(n.) 2. A lock designed to secure the
trunk of an automobile.
Source: Lock Industry Standards and Training
(LIST) Council
Trunnion
(n.) The part of a lever lock that accepts
the key and stabilizes it, typically
a single piece or an assembly consisting
of some combination of a nose, guide
and foot.
Source: Lock Industry Standards and Training
(LIST) Council
Try-Out Key
(n.) A manipulation key which is usually
part of a set, used for a specific series,
keyway, and/or brand of lock.
Source: Lock Industry Standards and Training
(LIST) Council
TTL
(abb.) 1. Transistor Transistor Logic
(abb.) 2. Time To Live
Source: Lock Industry Standards and Training
(LIST) Council
Tube
(n.) A hollow structure attached to the
outside of a combination lock for enclosing
the spindle between the lock case and
the dial.
Source: Lock Industry Standards and Training
(LIST) Council
Tubular Key
(n.) A key with a tubular blade. The
key cuts are made into the end of the
blade, around its circumference.
Source: Lock Industry Standards and Training
(LIST) Council
Tubular Key Cylinder
(n.) A cylinder whose tumblers are arranged
in a circle and which is operated by
a tubular key.
Source: Lock Industry Standards and Training
(LIST) Council
Tubular Lockset
(n.) a bored lockset whose latch or bolt
locking mechanism is contained in the
component installed into the edge bore.
Source: Lock Industry Standards and Training
(LIST) Council
Tubular Pick
(n.) A pick designed to operate a tubular
key lock.
Source: Lock Industry Standards and Training
(LIST) Council
Tumbler
(n.) A movable obstruction of varying
size and configuration in a lock or cylinder
which makes direct contact with the key
or another tumbler and prevents an incorrect
key or torque device from activating
the lock or other mechanism.
Source: Lock Industry Standards and Training
(LIST) Council
Tumbler Lock
(n.) 1. Tumblers are small objects, usually
made of metal that move within a block
cylinder in ways that obstruct a lock’s
operation until an authorized key or
combination moves them into alignment.
Provides more security that a ward lock.
Different type of tumbler locks are:
Lever Tumbler Locks, Disc Tumbler Locks
and Pin Tumbler Locks.
Source: Phillips, Bill; The Complete
Book of Locks and Locksmithing, fifth
edition, McGraw Hill, 2001
(n.) 2. The part in a lock that releases
the bolt when moved by a key.
(n.) A position within a lock designed
to accept a tumbler pack, it typically
includes a tumbler post and a spring
rest.
Source: Lock Industry Standards and Training
(LIST) Council
Tumbler Pack
(n.) A complete set of lever tumblers
for a given lock.
Source: Lock Industry Standards and Training
(LIST) Council
Tumbler Post
(n.) A rod mounted in a lever lock, upon
which the pivoting ends of the tumblers
are in turn mounted.
Source: Lock Industry Standards and Training
(LIST) Council
Tumbler Separator
(n.) A thin spacer placed between lever
tumblers to reduce friction.
Source: Lock Industry Standards and Training
(LIST) Council
Tumbler Spring
(n.) Any spring which acts directly on
a tumbler.
Source: Lock Industry Standards and Training
(LIST) Council
Turn
(n.) A lock, latch or exit device part
which is contacted to achieve the normal
operation. It may be a knob, lever or
thumb turn.
Source: Lock Industry Standards and Training
(LIST) Council
Turn Disk
(n.) A disk shaped component with a cam
actuated by a thumb turn, normally used
in a mortise lock.
Source: Lock Industry Standards and Training
(LIST) Council
Twisting Tumbler
(n.) A pin tumbler which must rotate
to a specific position to allow plug
rotation.
Source: Lock Industry Standards and Training
(LIST) Council
Two Column Progression
(n.) A process wherein key bittings are
obtained by using the cut possibilities
in two columns of the key bitting array.
Source: Lock Industry Standards and Training
(LIST) Council
Two Pin Master Key
(n.) A master key for all combinations
obtained by progressing two bitting positions.
Source: Lock Industry Standards and Training
(LIST) Council
Two Point Lock
(n.) A lock with two bolts which are
thrown and withdrawn simultaneously,
often in more than one direction.
Source: Lock Industry Standards and Training
(LIST) Council
Two-Step Progression
(n.) A progression using a two increment
difference between bittings of a given
position.
Source: Lock Industry Standards and Training
(LIST) Council
TXTL-60
(n.) A U.L. rating given to a container
where the door has been tested against
forcible entry with common hand tools
and/or abrasive cutting wheels, power
saws, and oxy-fuel gas cutting or welding
torch and may further include nitroglycerin
or other high explosives for a period
of 60 man minutes. The total quantity
of explosives employed may not exceed
8 ounces. Not more than 4 ounces is to
be used in a single charge.
Source: Lock Industry Standards and Training
(LIST) Council
Type 1
(n.) A UL rating given to an electronic
combination lock able to withstand 20
man-hours of expert manipulation as well
as other specifications as listed in
UL 2058.
Source: Lock Industry Standards and Training
(LIST) Council
Type 1F
(n.) A UL rating given to an electronic
combination lock able to withstand 20
man-hours of expert manipulation as well
as other specifications as listed in
UL 2058. The lock also meets U.S. Federal
Specifications FF-L-2740.
Source: Lock Industry Standards and Training
(LIST) Council
Type 2
(n.) A UL rating given to an electronic
combination lock able to withstand specifications
as listed in UL 2058.
Source: Lock Industry Standards and Training
(LIST) Council
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