glossary 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
thimble
n. the raised round part of a mortise lock escutcheon that the knob seats upon
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 control key
n. – the highest level control key when master keying the control function of an interchangeable core or removable core
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
tube nut
n. a hexagonal nut used to attach the dial ring to the tube on a safe lock
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