-A-

 
160 prep
n. a standard door preparation which consists of a 2-1/8" cross-bore with a 2-3/8" backset, and a 1" edge-bore with a mortise 1" wide and 2-1/4" high
 
161 prep
n. a standard door preparation which consists of a 2-1/8" cross-bore with a 2-3/4" backset, and a 1" edge-bore with a mortise 1-1/8" wide and 2-1/4" high
 
A2
n. an increment of .0125 typically used in a small format interchangeable core (SFIC)
 
A3
n. an increment of .018 typically used in a small format interchangeable core (SFIC)
 
A4
n. an increment of .021 typically used in a small format interchangeable core (SFIC)
 
A label
n. a classification by Underwriters Laboratories for doors with 3 hour rated fire protection
 
access control
n. any barrier or device, either natural or man made, that limits or prohibits free or unlimited entry or exit
 
access control cylinder
n. a replacement for a mechanical cylinder which incorporates electronic audit and/or authorization and allows the original host lock to function without additional wiring or hardware modifications
 
access control key fob
n. any device other than a key designed to allow a token to be used and carried on a key ring
 
accessory position
n. the position of an ignition switch intended to permit the use of radio or other equipment without turning on a drive train component
 
active case
n. the exit device case mounted on the stile of the door on which the lock is located
 
active leaf
n. the single door of a pair on which the active or locking hardware is mounted
 
active relocking device
n. a device that places its bolts every time a safe door is closed and activation via attack prevents it from retracting its bolts
 
active retainer
n. 1. a cylinder retaining mechanism which requires that the plug be rotated before the cylinder can be removed, 2. a plug retaining mechanism which requires that the plug be rotated before the retainer can be removed
 
active plug retainer
n. one in which the plug must be turned befor the device may be released or removed 
 
actuator
n. a device, usually connected to a cylinder, which, when activated, may cause a lock mechanism to operate
 
ADA
abb. Americans with Disabilities Act
 
adjustable ball hinge
n. a pivot with adjustable height for narrow stile doors
 
adjustable collar
n. a spring-loaded cylinder collar which can fill a range of gaps between the cylinder head and the door or escutcheon surface
 
adjustable mortise cylinder
n. any externally threaded cylinder whose length can be changed for a better fit in doors of varying thickness
 
AED
abb. anti-explosive device
 
AFTE
abb. Association of Firearm and Toolmark Examiners
 
after hours depository
n. a locked receptacle affording secure retention of items beyond normal business times
 
AHC
abb. Architectural Hardware Consultant (as certified by DHI)
 
AHD
abb. after hours depository
 
AHJ
abb. authority having jurisdiction
 
alarm system
n. an arrangement of electrical and/or electronic components which detect and report dangers, such as fire or intrusion
 
aligning tube
n. 1. a lock component which orients and joins the latch and knob spindles of certain bored locksets, 2. in some combination locks, a conduit which houses the spindle, located between the dial ring and the lock
 
 
alignment pin
n. the perpendicular projection from a master lever in a master keyed lever tumbler lock, which engages a group of combination levers and moves their gates to line up with the fence
 
all-section key blank
n. the key section which enters every keyway of its multiplex key system
 
ALOA
abb. Associated Locksmiths of America, Inc.
 
aluminum door
n. a door composed of an extruded or plate aluminum frame and a lite which is the major door surface
 
Americans with Disabilities Act
n. a US federal law dealing with minimum standards of building accessibility, as well as other issues concerning individuals with disabilities
 
angularly bitted key
n. a key which has cuts made into the blade at various degrees of rotation from the perpendicular
 
annunciator
n. an audible and/or visual signaling device
 
ANSI
abb. American National Standards Institute
 
ANSI strike
n. any of many strikes designed to fit door and frame preparations as specified in the applicable document in the ANSI A115 series, common usage refers to a strike with dimensions of 4 7/8" X 1 1/4"
 
ANSI 117.1
n. that section of the American National Standards Institute documents pertaining to handicap access
 
anti-friction
adj. pertaining to a feature which, upon contact with the strike, allows smoother operation of a latch bolt
 
anti-passback
adj. of or pertaining to an access control system feature designed prevent consecutive use of a given credential to allow entry by more than one person at a time
 
anti-punch collar
n. a two part system installed on a spindle shaft and safe body to prevent the spindle shaft from being punched into the lock case
 
anti-rap
adj. specifically designed to preclude bypass via attack based on sharp, repetitive blows to the mechanism
 
anti slip positioned
adj. of or pertaining to the orientation of a cam on a profile cylinder which requires rotation before it may be removed from the lock case
 
anti-wrench reinforcement spring
n. a lock cylinder spring designed to protect the inner and outer halves of a profile cylinder from being forcibly separated as a means of brute force entry
 
arbor
n. the threaded end of a safe door handle
 
architectural finish code
n. one of a series of specification codes used to indicate the color and texture of a metal end product that can be installed. Some finish specifications also note the base metal characteristics and processes used to obtain the end product.
 
architectural hardware
n. 1. fittings applied to protect a surface of, or to facilitate use of movable members in a building such as doors, windows, or cabinets, 2. various fixtures used in building construction
 
area zoning
n. the standard of limiting access, or detecting access, in multiple areas smaller than the entire installation
 
arm (of a closer)
n. door closer linkage which connects the closer to the frame or door, depending on the mounting style
 
armored escutcheon
n. a usually hardened ring, typically beveled, that resists physical attack
 
armored face plate
n. one that conceals all lock and/or cylinder mounting screws
 
ASIS
abb. American Society for Industrial Security
 
assembly occupancy
n. those buildings or areas which are designated as places of assembly according to life safety or building codes
 
associated change key
n. a change key which is related directly to particular master key(s) through the use of constant cuts
 
associated master key
n. a master key which has particular change keys related directly to its combination through the use of constant cuts
 
ASTM
abb. American Society for Testing and Materials
 
astragal
n. a molding attached to the face of the active leaf of a pair of doors and overlapping the inactive leaf
 
ATM
abb. automatic teller machine
 
ATT
abb. attendant's key
 
attack resistance
adj. design qualities of a product that render brute force physical defeat methods less effective or ineffective
 
attendant's key
n. a selective master key used in a hospital keying system
 
audit overrun
n. a means of attack designed to eliminate entries in an access control database, overfilling and scrolling off previous entries  
 
audit trail
n. a specific group of events selected from transaction records and listed sequentially
 
authority having jurisdiction
n. that person, usually within a municipality, charged with the application and interpretation of local life safety codes
 
automatic closing
adj. pertaining to a door which is equipped with a door closer, or other device to close it without manual intervention. Frequently found in Life Safety and fire code requirements.
 
automatic deadbolt
n. one designed to extend itself fully when the door is closed
 
automatic flush bolt
n. one designed to extend itself when both leaves of the pair of doors are in the closed position
 
automatic key machine
n. one capable of cutting keys with manual operations limited to loading and unloading keys
 
 
automatic teller machine
n. a device for dispensing cash, receiving deposits and performing other banking functions upon presentation of the proper authorization
 
auxiliary lock
n. any lock installed in addition to the primary lockset
 
auxiliary spring
n. a secondary spring used to support the lever handles of a lockset
 
auxiliary spring rose
n. oversized trim that interlocks with a lock chassis and external lever as a means to mount an auxiliary spring
 
 
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