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half moon cut
n. a semi-circular cut in the bolt throw bit of a key, with the cut axis
running parallel to the key shaft. Found typically on a key for a high
security lever safe lock.
half mortise
1. adj. pertaining
to an installation prep that typically leaves the bolt
face plate and a perpendicular surface of the lock visible,
with visible surfaces being flush mounted, 2. v. to make
a cavity in a door or drawer that is open on the edge and
on one side of the door or drawer, 3. adj. pertaining
to a locking device designed to fit in a half mortise prep
half-mortise
hinge
n. a hinge which
has one leaf mortised into the door and the second leaf
applied to the surface of the frame
half-surface hinge
n. a hinge which has one leaf mounted onto
a face of the door and the second leaf mortised into the
frame
hand
change
adj. pertaining to
a combination lock in which the wheels must be removed in
order to change the combination
handed
adj. pertaining to
hardware which is manufactured only for application on
doors with a specific orientation
handleset
n. a complete lock or latch assembly which incorporates a
pitcher handle
handicapped
code
n. any building
code designed to ease access for handicapped persons
hang
(rake & hang)
v. to cause a top
or master pin to rest on the plug when picking
hardened core (pin)
adj. a bottom or
top pin which is bimetallic, the central portion of which
being hardened metal intended to resist drill attack
hardplate
n. a tempered barrier
placed between the lock and the outside of a safe
to inhibit drilling
hard wire system
n. a system which uses metallic conductors to connect the
various sensors to the central processor
hardware key
n. a computer hardware component which
protects copyrights by preventing software from running
on any computer where the key is not installed. The key
is typically accessed via one of the ports.
hardware
schedule
n. a listing of the
door hardware used on a particular job it includes the
types of hardware, manufacturers, locations, finishes,
and sizes. It should include a keying schedule specifying
how each locking device is to be keyed.
hasp
n. a hinged metal
strap designed to be passed over a staple and secured in
place
header
n. the horizontal, top, member of a door jamb
heel
& toe locking
n. describes a
padlock which has locking dogs at both the heel and toe
of the shackle
heel
(of a padlock shackle)
n. the part of a
padlock shackle which is retained in the case when in the
unlocked position
height adjustment screw
n. a screw contained within the hinge block
of a safe that raises or lowers the door to clear the frame
helmet lock
n. auxiliary lock on motorcycles used to
secure a helmet
HGM
abb. horizontal
group master key
HiCo
abb. high coercivity
high
coercivity
adj. a high energy
form of magnetic encoding measuring in the range of 2400
to 4000 Oe which is resistant to accidental erasure
high security cylinder
n. a cylinder which offers a greater degree of resistance
to any two or more of the following: picking, impressioning, key
duplication, drilling or other forms of forcible entry
high
security key
n. a key for a high
security cylinder
hinge
security stud
n. a protrusion on
one leaf of a hinge which interlocks with the other when
the door is closed
hinge
stile
n. the vertical
edge of a door where hinges are installed
hinged
shackle
n. a shackle whose
heel is permanently mounted to the padlock case in a
manner which allows the shackle to pivot to open
HKP
abb. housekeeper's
key
Hobbs
shackle
n. a hinged shackle
with a notch for the bolt in its movable end
hold open
n. 1. a function of self latching hardware which allows a
lock to be set in a non-latching mode 2. A function of a door closer, or
separate hardware device, which allows the door to be retained in an open
position
hold
open arm
n. a door closer
arm with the capability of maintaining the door in the
open position
hold
open cylinder
n. a cylinder
provided with a special cam which will hold a latch bolt
in the retracted position when so set by the key
holdback
n. a function of some self latching locks which allows
selective retention of the bolt to prevent latching when the door is
closed
holding
fixture
n. a device which
holds cylinder plugs, cylinders, housings, and/or cores
to facilitate the installation of tumblers, springs
and/or spring covers
hole change (wheel)
n. a perforated tumbler that may have its
combination set by placement of a fly relative to, or in,
one of the perforations
hollow core door
n. a non-metal door with structural reinforcement
creating air pockets between the two faces
hollow
driver
n. a top pin
hollowed out on one end to receive the spring, typically
used in cylinders with extremely limited clearance in the
pin chambers
hollow metal door
n. typically a door made of sheet metal on all surfaces
and lightly reinforced to make it rigid
hook
n. a vertical surface at the top of a cut
angle that prevents smooth insertion or withdrawal of a key
hook
bolt
n. a lock bolt
shaped in the general outline of a hook. Normally used on
sliding doors or where spreading of the frame and door is
a possible attack.
hook pick
n. a pick with a
tip that curves upward by 45º or more toward perpendicular
to the blade
hook ward
n. a ward that has an
offset requiring an 'L' shaped cut in the key
horizontal
exit
n. an exit to the
outside or an area of refuge on the same or nearly the
same level
horizontal
group master key
n. the two pin
master key for all combinations listed in all blocks in a
line across the page in the standard progression format
horizontal
locking
n. the locking
mechanism associated with vehicle doors with horizontal
linkage
horn
n. in a
non-cylinder lock, the housing which surrounds the nose
and extends through the door or drawer
horn
plate
n. the cover of a
lever tumbler lock case to which the horn is attached
hospital
hinge
n. a hinge with a
large chamfer at each end of the knuckle
hotel cylinder
n. a cylinder which can function to prevent
the operation of all keys except emergency, display and some
shut out keys. It may also contain an indicator.
housekeeper's
key
n. a selective
master key in a hotel master key system which may operate
all guest and linen rooms and other housekeeping areas
housing
n. that part of a
locking device which is designed to hold a core
HP
abb. hardplate
hub
n. 1. a lock component,
which redirects rotational motion from a spindle or shaft to
linear movement of a latch or bolt, 2. (key change), the part
of a combination wheel that the change key engages to permit
the combination to be changed
hybrid
key
n. a key that can
operate locks using two or more different technologies in
one device, e.g. mechanical/electronic, mechanical/magnetic,
etc.
hybrid
locking system
n. a locking system
which derives its security from two or more different
technologies operated by the same key in one device, e.g.
mechanical/electronic, mechanical/magnetic, etc.
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