L-handle
n. an L-shaped handle assembly which may be lockable
L-handle lock
n. a cabinet lock with an L-shaped handle
labeled door
n. a door which has a fire protection certification by one of the recognized underwriting agencies
labeled exit
n. a labeled door equipped with labeled hardware that can be used for building egress
laminated padlock
n. a padlock whose case is constructed of separate plates usually riveted together
LAN-alarm web camera
n. a self-standing surveillance camera having alarm compatible for IR devices, switches and onboard website, Internet email sending capability
large format interchangeable core
n. an interchangeable core which is too large to fit into a small format interchangeable core housing
laser cut
adj. 1. a way of cutting a key so that the roots of adjacent cuts are connected by a straight-line cut; 2. a way of cutting a key so that the root of a shallow cut is widened until it intersects the included angle of an adjacent deeper cut
latch
1. n. a mechanical or magnetic door fastener which can automatically keep a door, gate, etc., closed, 2. v. engagement of a latch when a door, gate, etc. is pushed or pulled closed
latch bolt
n. a spring actuated bolt, normally with one or more beveled surfaces, which, when aligned with the strike, engages it automatically
latch guard
n. a plate or combination of interlocking pieces designed to block access to the edge of a latch when the door is shut
latch tube
n. the encasement portion of some types of lockset that contains the latch and may also contain its operating mechanism
latching speed (of a door closer)
n. the final speed of a door just prior to closing
latchset
n. a non-locking device which contains only a latch bolt, a means of operating said latch and all required trim
layout tray
n. a compartmented container used to organize cylinder parts during keying or servicing
lazy cam/tailpiece
n. a cam or tailpiece designed to remain stationary while the cylinder plug is partially rotated and/or vice-versa
leading face
n. the door face closest to the strike side of the jamb when the door is open
leaf
n. 1.One half or section of a hinge 2. One door in a set of double doors 3. One section of a multiple section door
left hand (man door)
adj. pertaining to an inward swinging door with hinges on the left side, using the outside of the door as reference
left hand reverse bevel (door)
adj. pertaining to a left handed door which swings outward
leg irons
n. -pl. a pair of ringlike fetters, connected by a short chain or straight member, designed to be locked about the ankle
levels of keying
n. pl. the divisions of a master key system into hierarchies of access, as shown in the following tables. Note: the standard key coding system has been expanded to include key symbols for systems of more than four levels of keying.
TWO LEVEL SYSTEM
LEVEL OF KEYING
Level II
Level I |
KEY NAME
master key
change key |
ABB.
MK
CK |
KEY SYMBOL
AA
1AA, 2AA, etc. |
THREE LEVEL SYSTEM
LEVEL OF KEYING
Level III
Level II
Level I |
KEY NAME
grand master key
master key
change key |
ABB.
GMK
MK
CK |
KEY SYMBOL
A
AA, AB, etc.
AA1, AA2, etc |
FOUR LEVEL SYSTEM
LEVEL OF KEYING
Level IV
Level III
Level II
Level I |
KEY NAME
great grand master key
grand master key
master key
change key |
ABB.
GGMK
GMK
MK
CK |
KEY SYMBOL
GGMK
A, B, etc.
AA, AB, etc.
AA1, AA2, etc. |
FIVE LEVEL SYSTEM
LEVEL OF KEYING
Level V
Level IV
Level III
Level II
Level I |
KEY NAME
great great grand master key
great grand master key
grand master key
master key
change key |
ABB.
GGGMK
GGMK
GMK
MK
CK |
KEY SYMBOL
GGGMK
A, B, etc.
AA, AB, etc.
AAA, AAB, etc.
AAA1, AAA2, etc. |
SIX LEVEL SYSTEM
LEVEL OF KEYING
Level VI
Level V
Level IV
Level III
Level II
Level I |
KEY NAME
great great grand master key
great grand master key
grand master key
master key
sub-master key
change key |
ABB.
GGGMK
GGMK
GMK
MK
SMK
CK |
KEY SYMBOL
GGGMK
A, B, etc.
AA, AB, etc.
AAA, AAB, etc.
AAAA, AAAB, etc.
AAAA1, AAAA2, etc. |
lever (combination lock)
n. part of a combination lock that engages the drive cam, when the proper combination is supplied, and is directly attached to the locking bolt
lever handle
n. a turn device in the general shape of an "L" used on certain locks and latches, as an alternate to a knob for ease of use
lever nose
n. the hooked portion of a lever that engages the drive cam in a combination lock
lever pack
n. a set of lever tumblers
lever rig
n. any device which utilizes a fulcrum with a long bar or pole as a means to apply pressure while drilling
lever tumbler
n. a flat, spring-loaded tumbler which usually pivots on a post. It contains a gate which must be aligned with a fence to allow movement of the bolt.
LFIC
abb. Large Format Interchangeable Core
LH
abb. left hand
LHR
abb. left hand reverse bevel
LHVD
abb. left hand vertical down
LHVU
abb. left hand vertical up
lift arc
n. the distance a lever tumbler may be raised by a key from its at-rest position
linkage
n. 1. any of various parts in a lock that help transfer motion to the bolt of a lock from a cylinder, turnpiece or other actuator not mounted to or touching the bolt/lock case, 2. part of the interconnected boltworks of an automotive lock
lip (of a strike)
n. the extended (usually curved) leading edge of a strike
lite
n. a hole in a door or wall to admit light, usually with glass or another transparent or translucent pane
loading tool
n. a tool which aids installation of cylinder components into the cylinder shell
LOBC
abb. 1. locked on by combination, 2. (sic) locked on back cover
LOBC index
n. the index to which a combination is dialed in order to remove the lock's cover
local alarm
n. an alarm that is annunciated in the immediate vicinity of the activating device
lock
n. any device which prevents access or use by requiring special knowledge or equipment
lock-in
adj. of or pertaining to a combination lock that is inoperable because the last number of a combination is set in the forbidden zone
lock service package
n. a kit offered by the manufacturer or distributor of a product, which contains what he deems required to properly service the product
lock stile
n. the vertical edge of a door designed for lock or latch installation
lock window
n. an opening in the case of a lever tumbler lock for viewing the fence entering the gates of the levers
lockdown bar
n. an assembly which permits a laptop computer to be used, opened, closed, but not removed from a premesis, often secured by a padlock
locked closed
adj. of or pertaining to a condition wherein the bolt(s) are engaged and the lock(s) are restricting access
locked on by combination
n. a combination lock cover that can only be removed in conjunction with dialing the combination or while the lock bolt is in motion
locked open
adj. of or pertaining to a condition wherein the bolt(s) are engaged and lock(s) are not restricting access
locker lock
n. 1. any of various types of locks designed for a specific mounting preparation commonly used on lockers as well as other applications, 2. any of various locks used to lock lockers
locking lug
n. a fixed component of a safe which locks the safe door in place in the locked position. See appendix
locking lug nut
n. a lug nut which requires the use of a key or special wrench
lockout
n. any situation in which the normal operation of a lock or cylinder is prevented
lockout key
n. a key made in two pieces. One piece is trapped in the keyway by the tumblers when inserted and blocks entry of any regular key. The second piece is used to remove the first piece.
lockset
n. a locking device, complete with trim, mounting hardware and strike
locksmith
n. a person with the knowledge and ability to select, install, service and bypass all the components of an electrical or mechanical lock
LoCo
abb. low coercivity
lost ball keying
n. a construction keying method that uses a tiny ball(s) in the pin stack to allow construction master key operation. The ball(s) may be removed from the pin stack without disassembly of the cylinder.
low coercivity
adj. a low energy form of magnetic encoding measuring 300 Oe which is not very resistant to accidental erasure
lug door
n. a usually rotatable safe door which has projections that interlock with the safe body to retain the door
Source: Lock Industry Standards and Training (LIST) Council
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