-H-
- 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.
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- 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
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- 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
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- 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
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- hand change
- adj. pertaining to a combination
lock in which the wheels must be removed in order to change the combination
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- handed
- adj. pertaining to hardware
which is manufactured only for application on doors with a specific
orientation
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- handicapped code
- n. any building code designed
to ease access for handicapped persons
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- hang (rake &
hang)
- v. to cause a top or master
pin to rest on the plug when picking
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- 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
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- hardplate
- n. a tempered barrier placed
between the lock and the outside of a safe to inhibit drilling
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- hard wire system
- n. a system which uses metallic conductors to connect
the various sensors to the central processor
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- 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.
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- 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.
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- hasp
- n. a hinged metal strap designed
to be passed over a staple and secured in place
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- header
- n. the horizontal, top, member of a door jamb
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- heel & toe locking
- n. describes a padlock which
has locking dogs at both the heel and toe of the shackle
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- heel (of a padlock
shackle)
- n. the part of a padlock shackle
which is retained in the case when in the unlocked position
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- height adjustment screw
- n. a screw contained within the hinge block of a safe
that raises or lowers the door to clear the frame
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- helmet lock
- n. auxiliary lock on motorcycles used to secure a helmet
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- HGM
- abb. horizontal group master
key
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- HiCo
- abb. high coercivity
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- 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
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- high security cylinder
- n. a cylinder which offers a
greater degree of resistance to any or all of the following: picking,
impressioning, key duplication, drilling or other forms of forcible
entry
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- high security key
- n. a key for a high security
cylinder
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- hinge security stud
- n. a protrusion on one leaf
of a hinge which interlocks with the other when the door is closed
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- hinge stile
- n. the vertical edge of a door
where hinges are installed
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- 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
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- HKP
- abb. housekeeper's key
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- Hobbs shackle
- n. a hinged shackle with a notch
for the bolt in its movable end
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- hold open arm
- n. a door closer arm with the
capability of maintaining the door in the open position
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- 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
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- 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
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- 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
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- 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
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- hook
- n. a vertical surface at the top of a cut angle that
prevents smooth insertion or withdrawal of a key
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- 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.
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- hook pick
- n. a pick with a tip that curves
upward by 45º or more toward perpendicular to the blade
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- hook ward
- n. a ward that has an offset
requiring an 'L' shaped cut in the key
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- horizontal exit
- n. an exit to the outside or
an area of refuge on the same or nearly the same level
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- 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
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- horizontal locking
- n. the locking mechanism associated
with vehicle doors with horizontal linkage
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- horn
- n. in a non-cylinder lock, the
housing which surrounds the nose and extends through the door or drawer
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- horn plate
- n. the cover of a lever tumbler
lock case to which the horn is attached
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- hospital hinge
- n. a hinge with a large chamfer
at each end of the knuckle
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- 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.
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- 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
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- housing
- n. that part of a locking device
which is designed to hold a core
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- HP
- abb. hardplate
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- 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
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- 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.
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- 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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