-B-
-
- b-t
- abb. bow-to-tip
-
- B label
- n. a
classification by Underwriters Laboratories for doors
with 1 1/2 hour rated fire protection
-
- back
plate
- n. a thin piece of
metal, usually with a concave portion, used with machine
screws to fasten certain types of cylinders to a door
-
- backcheck
- n. the resistance
provided by a door closer as a door is opened
-
- backset
- n. the distance
between the center of a cross-bore and the bolt edge of a
door or drawer
-
- baffle
- n.
a device or devices designed to deter the retrieval of items through a
depository opening
-
- balance
(a combination)
- v. to dial a combination
1 number high and 1 number low to verify a correct combination
setting
-
- balance
hole
- n.
the place in a combination wheel where material has been eliminated to
provide an equal distribution of weight over the entire wheel relative to
the axis
-
- ball
bearing
- n. 1. a metal
ball used in the pin stack to accomplish some types of hotel
or construction keying, 2. a ball, usually made of steel,
used by some lock manufacturers as the bottom element in
the pin stack in one or more pin chambers, 3. any metal
ball used as a tumbler's primary component, 4. used as a
means of repairing a drilled hole in a safe when welded
in place
-
- ball
bearing hardplate
- n. a hardplate
that contains metal balls, typically two types, imbedded in a
honeycomb pattern, or free moving within a hardplate envelope
-
- ball bearing
hinge
- n. a hinge which
uses ball bearings between its knuckles to reduce friction
-
- ball catch
- n. a latch which
uses spring pressure to force a ball bearing into a recess in
its strike
-
- ball check
- n. a spring
loaded ball bearing in a door closer arm assembly that acts
to limit arm travel
-
- ball
locking
- adj. a method
of locking a padlock shackle into its case using ball
bearing(s) as the bolt(s)
-
- barium
ferrite card
- n. an access
control system credential consisting of magnetized ferrite
embedded in a plastic card with polarity and location being
important features
-
- barrel
bolt
- n. a surface mounted slide type which has a cylindrical shape
-
- barrel key
- n. a type of
bit key with a hole drilled into the shank from the tip
-
- barrier
free
- n. having to
do with the absence of restrictions to access by the
handicapped
-
- Barron,
Robert
- the Englishman
credited with the invention of the double-acting lever
tumbler in 1778
-
- Basic
Building Code
- n. former name
for BOCA National Building Code
-
- battery
eliminator
- n. an electric device designed to provide energy to equipment normally
requiring electric power storage devices for operation
-
- BBC
- abb. Basic
Building Code
-
- BCH
- abb. bolt control handle
-
- bell
box
- n. the
protective enclosure for a bell or other alarm sounding
device
-
- Bell
type key
- n. a key
whose cuts are in the form of wavy grooves milled into
the flat sides of the key blade. The grooves usually run
the entire length of the blade.
-
- bevel
(of a door)
- n. the
pitch on the leading edge of a door which allows
clearance for closing
-
- bevel
(of a lock)
- n.
the pitch of the face designed to match the pitch of a door edge. In some
locks it is adjustable.
-
- bezel
- n. a
threaded collar commonly used to secure certain cylinder
or lock assemblies
-
- BHMA
- abb.
Builders Hardware Manufacturers Association
-
- bible
- n. that
portion of the cylinder shell which normally houses the
pin chambers, especially those of a key-in-knob cylinder
or certain rim cylinders
-
- bicentric
cylinder
- n.
one which has two independent plugs, usually with different keyways. Both
plugs are operable from the same side/surface. It is designed for
use in extensive master key systems.
-
- bicycle
padlock
- n. one with sufficient shackle clearance to secure a bicycle
-
- bi-directional
cylinder
- n. a cylinder
which may be operated in a clockwise and counterclockwise
direction by a single key
-
- bi-fold
door
- n. a door
with two or more sets of hinges, the additional set(s)
allows the door to have an accordion action when opened
-
- bilevel
capable
- n. typically
a key that can operate two compatible mechanisms which have
different security features
-
- binary
cut key
- n. a key
whose combination only allows for two possibilities in
each bitting position: cut/no cut
-
- binary
type cylinder or lock
- n. one whose combination only allows for two bitting possibilities in
each bitting position
-
- biometric
- adj. of or
pertaining to a lock with a hybrid mechanism, part of the
mechanism identifies a physical attribute such as finger
print, voice print, etc. while another part is a mechanical
mechanism
-
- bit
- n. 1. the part of
the key which serves as the blade, usually for use in a
warded or lever tumbler lock 2. v. to cut a key
-
- bit height
- n. a measurement
from the post of a bit key outward to the end of the bit
-
- bit key
- n. a key with
one or more projecting bits
-
- bit thickness
- n. a measurement
of the bit from one side to the other side
-
- bit width
- n. as inserted
into a lock, a measurement from the leading edge to the trailing
edge of a bit
-
- bitting
- n. 1. the
number(s) which represent(s) the dimensions of the key 2.
the actual cut(s) or combination of a key
-
- bitting
depth
- n. the depth
of a cut which is made into the blade of a key
-
- bitting
list
- n. a listing
of all the key combinations used within a system. The
combinations are usually arranged in order of the blind
code, direct code, and/or key symbol.
-
- bitting
orientation
- n. the specification of how a written combination is to be applied to a
key (tip-to-bow, etc.)
-
- bitting
position
- n.
the location of a key cut as dimensioned from the stop of the key, and
irrespective of cut depth
-
- blade
- n. the
portion of a key which may contain the cuts and/or millings
-
- blank
- adj. uncut, see
also "key blank"
blade
height
n. 1. in a cylinder
key, the distance from the bottom of the blade to the top of the uncut surface,
2. in a multiply bitted key, the distance from a registration point to the top
of the uncut surface
blade
length
n. in a cylinder key,
the distance from the tip of the key to the bow stop or the bow
blade
width
n.
in a cylinder key, the distance from one non-bitted surface to the opposite
non-bitted surface
- lind
code
- n. a designation,
unrelated to the bitting, assigned to a particular key
combination for future reference when additional keys
or cylinders may be needed
-
- block
master key
- n. the one
pin master key for all combinations listed as a block in
the standard progression format
-
- blocking
lever
- n. a lever
in a safe deposit lock which blocks the renters key from
completely entering the lock until the guard key has been
inserted and turned
-
- BMK
- abb. block
master key
-
- BOCA
- abb. Building
Officials and Code Administration International (formerly
Basic Building Code)
-
- BOCA
National Building Code
- n. the
model building code developed and published by BOCA
-
- bolt
- n. any
movable projection which blocks the movement of one object
relative to another
-
- bolt
control handle
- n.
a lever or wheel shaped device on a safe or vault door that is used to extend
or retract the boltworks
-
- bolt
cup
- n. a
thimble shaped device in a safe door frame that a
locking bolt extends into when the door is closed
and the bolt(s) are extended
-
- bolt
head
- n. the
part of a bolt that enters a strike
-
- bolt
motor
- n. 1. a
mechanical device that extends and retracts the door
bolt(s)of a safe, normally engaged by closing the
door and disengaged by a time lock, 2. a mechanical
device (usually electrically powered) that extends and
retracts the bolt of a safe lock. It is commonly disengaged
by an electronic input such as that from a keypad.
-
- bolt
sensor switch
- n. a switch
installed to detect when a lock bolt is extended or retracted
-
- bolt shim
- n. a plate
or plates mounted to the frame of a vault to provide equal
gapping for each locking bolt
-
- bolt
tail
- n. the part
of a bolt retained in the lock case that contains the bolt
slot and maintains bolt alignment
-
- boltwork
button
- n. the component
which automatically triggers extension of the locking
bolt(s) when the door is in the closed position
-
- boltworks
- n. 1. the
combination of bars, rods, plates and linkages in a safe door
designed to hold the door in the locked or unlocked position
depending on the status of the lock itself, 2. any part of a
lock other than a cylinder, turnpiece, or operating handle that
affects movement of, or the ability to move, the bolt
-
- bond box
- n. the removable
container within a safe deposit box compartment
-
- bored
lock
- n. a lock
for a door prepared with one or more cross-bores and one or
more edge-bores
-
- borescope
- n. an internally
lighted optical instrument for viewing normally concealed or
inaccessible components
-
- boring
jig
- n. a tool,
temporarily affixed to a door, which provides a template
structure to guide drill bits properly when preparing for
the installation of specific hardware
-
- bottom
of blade
- n. the
portion of the blade opposite the cut edge of a single
bitted key
-
- bottom
pin
- n. usually
a cylindrical shaped tumbler which may be conical, ball
shaped or chisel pointed on the end which makes contact
with the key
-
- bounce
- v. a method
used to open certain safes involving dropping the safe and
relying on gravity and inertia to move the bolt and open
the safe
-
- bow
- n. the portion
of the key which serves as a grip or handle
-
- bow stop
- n. a type
of stop located near the key bow
-
- bow to tip
- n. a specification
that a bitting combination is recorded starting at the bow and
proceeding to the tip
-
- box of
wards
- n. a complete
unit of intricate wards installed in or on a lock case
-
- box
strike
- n. a strike
equipped to line the bolt cavity for both aesthetic and
protective purposes
-
- brace Lock
- n. a deadbolt
lock that engages an independent bolt, one end of which is
mounted in the floor away from the door
-
- Bramah,
Joseph
- the Englishman
who had the world's first patent of a locking mechanism in
1784. It was the first lock incorporating a cylinder whose
key did not contact the lock bolt directly.
-
- Bramah
type lock
- n. a lock or
cylinder using a mechanism with sliders, normally arranged
in a circle
-
- bridge
assembly
- n. a removable
frame that contains the wheel pack and wheel post that is
often found in mechanical vault locks
-
- bridge
ward
- n. a center
ward attached to the interior of a lock by means of a bracket
-
- broach
- n. 1. a tool used to cut the keyway into the cylinder plug 2. v. to cut
the keyway into a cylinder plug with a saw like tool
-
- building
master key
- n.
one which operates all or most master keyed locks in a given building
-
- build-up
dimension
- n.
1. the distance between two different shear lines, as expressed in units
of the manufacturer's increment or as an actual measurement, 2. the
dimension of the pin required in a particular chamber, which will allow
one key to operate at the plug shear line and a different key to operate
at a different shear line
-
- build-up
pin
- n. the additional
element of a pin stack required to allow operation at
different shear lines in a cylinder
-
- bullet
catch
- n. a projecting friction latch which is spherical or dome shaped
-
- bump
key
- n. a lock
picking key with uniform steeples between cuts that is
forced further into the lock via impact
-
- burglar
alarm
- n. a system
designed to detect and report conditions, which may indicate
intrusion or attempted intrusion
- burglar chest
- n.
a small safe, typically with a UL rating, designed to resist burglary
attempts
-
- burglar
resistant
- adj. of or
pertaining to a security container designed to resist forcible
entry for a specified period of time determined by the rating
of the container
-
- button knob
- n. the knob in
a key-in-knob lock that includes a push or turn button
- buzzer plate
- n.
an automotive ignition component that triggers an alarm when the key is
in the ignition and a door is open without the engine running
- bypass
key
- n. the key
which operates a key override cylinder
-
- by-pass tool
- n. a device
that neutralizes the security of a locking device, or its
application hardware, often taking advantage of a design
weakness
-
- by-passing
door lock
- n. a lock with
a bolt that extends to block parallel movement of another door
-
- by-passing
sliding door
- n. Two doors
mounted on tracks parallel to each other that when one or both are
slid to opposite extremes block the opening. Typically, one may
be moved behind the other to allow access.
This listing of the
Locksmith Dictionary is courtesy of