- 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 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 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 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

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

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

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

trunkslammer

n. someone who doesn't have, or want, state-of-the-art capabilities and does shoddy work

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 structure attached to the outside of a combination lock for enclosing the spindle between the lock case and the dial

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