-T-

 
t-b
abb. tip-to-bow
 
T-handle
n. a T-shaped handle assembly which may be lockable
 
T-strike
n. a strike whose lip spans the middle portion (but not the full height) of the strike
 
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
 
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
 
talon
n. the part of a lever lock bolt that is relieved to allow the key to enter and move the bolt
 
tamper resistant fastener
n. any one of several screws or nuts which have a specialized head, requiring a special-access tool for removal
 
tamper switch
n. a sensor that signals when someone attempts to access the mechanism of a security device
 
TCP
abb. transmission control protocol
 
TCP/IP
n. the system networks use to communicate with one another
 
telescoping bolt
n. the bolt of a locking device which extends and retracts by successive overlapping sections
 
telescoping column
n. a steering column adjustable for length
 
template
n. a pattern used to mark cutout locations for hardware installation
 
template hinge
n. a hinge with dimensions, hole locations and tolerances which conform to ANSI standard A156.7
 
tension washer
n. a flexible washer under a wheel pack in some combination locks for adjusting tension on that wheel pack
 
tension wrench
n. a tool used to apply torque to a lock bolt or cylinder plug while attempting picking
 
theoretical key changes
n. pl. the total possible number of different combinations available for a specific cylinder or lock mechanism
 
thermal lance
n. an instrument, used for cutting with a pure oxygen feed, that uses itself and the material being cut as fuel
 
thermal relocker
n. a relocking device which is activated by heat
 
threaded rose
n. a rose with an internally threaded ferrule
 
three column progression
n. a process wherein key bittings are obtained by using the cut possibilities in three columns of the key bitting array
 
three pin master key
n. a master key for all combinations obtained by progressing three bitting positions
 
three point latch
n. a self-latching device designed to latch a door at the top, bottom and edge
 
throat cut
n. the cut made into a key to bypass a throat ward
 
throat ward
n. an obstruction formed in a lock's case or horn at the point of key entry, which prevents key rotation
 
throw
n. the distance a bolt or latch projects from the faceplate or case of a lock in the extended position
 
throw member
n. an intermediate actuator which engages the rear of the plug to transfer motion to a cam, tailpiece or other actuator
 
thumb cuffs
n. restraints designed to lock on the thumbs
 
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
 
thumb latch
n. a lock with a thumbpiece to actuate the latch
 
thumb stop
n. the part of a rim latch that can be used to lock the bolt in either the retracted or extended position until released
 
thumb turn
n. a actuator which can be turned by thumb and forefinger
 
thumb turn cylinder
n. a cylinder with a turn knob rather than a keyway and tumbler mechanism
 
thumbpiece
n. a generally flat, projecting latch actuator found above a grip handle and depressed by the thumb
 
tilt column
n. a steering column design which permits vertical adjustment of the steering wheel
 
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.
 
time delay lock
n. a lock that has a mechanism for preventing unlocking until a specific amount of time has passed
 
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.
 
timing
n. the engagement or positioning of an assembly of internal parts so as to produce the desired sequence of engagement during operation
 
tip
n. the portion of the key which enters the keyway first
 
tip stop
n. a type of stop located at or near the tip of the key
 
tip to bow
n. a specification that a bitting combination is recorded starting at the tip and proceeding to the bow
 
tips & stems
n. a key bow and shank that uses a detachable end with a bit(s) on it
 
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
 
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
 
TMK
abb. top master key
 
toe (of a shackle)
n. that part of the shackle, which may be removed from the padlock body
 
toggle
n. a pivoting one-piece stop works activator
 
token
n. a self-contained electronic key
 
tolerance
n. the deviation allowed from a given dimension
 
tone dialer
n. a telephone communication device, normally activated by an alarm, that uses a series of tones to dial a predetermined number
 
top-down order
n. an arrangement of potential key cut depths within a KBA beginning at the shallowest and continuing to the deepest
 
top jamb mount
n. surface application of a door closer body directly to the header
 
top master key
n. the highest level master key in a master key system
 
top of blade
n. the bitted edge of a single bitted key
 
top pin
n. usually a cylindrical shaped tumbler, usually flat on both ends and installed in direct contact with the spring in the pin stack
 
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
 
touch bar
n. a type of exit device actuator which typically does not pivot and retracts the bolt with a minimum of pressure
 
touch pad
n. 1. an exit device actuator with a paddle shape 2. a remote door opener activator, typically electric or electronic, which facilitates handicap access
 
track
n. the bitting surface of a sidewinder key formed when it is cut
 
trailing face
n. the door face farthest from the strike side of the jamb when the door is open
 
transom catch
n. a surface mounted latch, typically having an actuator operated by a long pole or an attached pull chain
 
transponder key
n. a key with an electronic component which can convert a radio signal into an electrical current enabling the key to transmit a unique code back in return
 
trap
n. an indicator which, once disturbed, wittingly or unwittingly, alerts those setting it to an attempted covert entry
 
tri-bolt
adj. referring to a three point locking system usually found on round door safes
 
tri spoke handle
n. a safe handle that has 3 extensions off the main hub
 
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
 
trim
n. exposed components of a lockset or latchset, which allow operation, enhance appearance or provide protection
 
trim panel
n. the decorative and functional assembly, which covers the inside surface of a vehicle, door
 
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
 
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
 
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
 
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
 
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
 
trunkslammer
n. someone who doesn't have, or want, state-of-the-art capabilities and does shoddy work
 
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
 
trunk lock
n. 1. a hinged strap with a staple or a lock at the end that mates with a receptacle in the trunk, 2. a lock designed to secure the trunk of an automobile
 
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
 
TTL
abb. 1. transistor transistor logic, 2. time to live
 
T-strike
n. a strike whose lip spans the middle portion (but not the full height) of the strike
 
tube
n. a hollow cylindrical pipe passing through a safe or vault door from the lock to the front of the door
 
tube horn
n. a protrusion designed into the back of a combination lock case for attachment of the tube
 
tubular key
n. a key with a tubular blade. The key cuts are made into the end of the blade, around its circumference.
 
tubular key cylinder
n. a cylinder whose tumblers are arranged in a circle and which is operated by a tubular key
 
tubular lockset
n. a bored lockset whose latch or bolt locking mechanism is contained in the component installed into the edge bore
 
tubular pick
n. a pick designed to operate a tubular key lock
 
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
 
tumbler nest
n. a position within a lock designed to accept a tumbler pack, it typically includes a tumbler post and a spring rest
 
tumbler pack
n. a complete set of lever tumblers for a given lock
 
tumbler post
n. a rod mounted in a lever lock, upon which the pivoting ends of the tumblers are in turn mounted
 
tumbler separator
n. a thin spacer placed between lever tumblers to reduce friction
 
tumbler spring
n. any spring which acts directly on a tumbler
 
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.
 
turn disk
n. a disk shaped component with a cam actuated by a thumb turn, normally used in a mortise lock
 
twisting tumbler
n. a pin tumbler which must rotate to a specific position to allow plug rotation
 
two column progression
n. a process wherein key bittings are obtained by using the cut possibilities in two columns of the key bitting array
 
2 in 1 pick
n. a tool designed to open lever locks where bolt pressure and lever manipulation are applied simultaneously
 
two pin master key
n. a master key for all combinations obtained by progressing two bitting positions
 
two point lock
n. a lock with two bolts which are thrown and withdrawn simultaneously, often in more than one direction
 
two-step progression
n. a progression using a two increment difference between bittings of a given position
 
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.
 
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
 
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.
 
type 2
n. a UL rating given to an electronic combination lock able to withstand specifications as listed in UL 2058

 

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Appendix

This listing of the Locksmith Dictionary is courtesy of