|
Glossary:
Active Door (in a pair of doors):
The leaf that opens first and the one to which the lock is
applied.
Anti-Friction Bearing: Any bearing
having the capability of effectively reducing friction.
Anti-Friction Latch Bolt: A latch
bolt designed to reduce friction when the bolt starts to engage
the lock strike.
Architectural Hardware: Term applied
to all hardware used in building construction but particularly
that used on or in connection with doors, windows, cabinets
and other movable members.
Armored Front: A lock that consists
of two plates: one, the under plate, is fastened to the case
and is unfinished; two, the finish plate, is fastened to the
under plate and when in place covers the cylinder set screws
thus protecting them from tampering. Used on mortise locks.
Armor Plate: A plate similar to a
kick plate but covering the door to a greater height, usually
40" (1040 mm) or more from the bottom.
Astragal: A molding or strip whose
purpose is to cover or close the gap between the edges of
a pair of doors. Some types overlap, others meet at the center
line of the gap. (See Coordinator.)
Auxiliary Dead Latch: A supplementary
latch that automatically deadlocks the main latch bolt when
the door is closed. (Also called Deadlocking Latch Bolt.)
Back Check: Optional feature in hydraulic
door closers slowing the opening swing of door somewhere between
60 and 85 degrees of opening. Designed to protect an object
be hind the door. Not intended to act as an overhead stop.
Backset (of a lock): The horizontal
distance from the face of the lock to the center line of knob
hub, keyhole or cylinder. (Measured from the high side of
a beveled door.)
Backset (of a hinge): The distance
from the edge of the door to the hinge.
Ball-Bearing Hinge: A hinge equipped
with ball bearings between the hinge knuckles to reduce friction
(See Anti-Friction Bearing.)
Bevel (of a door): The angle of the
lock edge in relation to the face of the lock stile. Standard
bevel is 1/8" in 2" (3.2 mm in 50.8 mm). If otherwise
detailed it must be so noted in ordering locks.
Bevel (of a lock front): The angle
of a lock front when not at right angle to the lock case,
allowing the front to be applied flush with the edge of a
beveled door
Bit (of a key): The projecting blade,
cut in a manner that actuates the tumblers and permits the
lock bolts to be operated.
Bored Lock (or Latch): Lock or latch
whose parts are intended for installation in holes bored in
a door
Box Strike: A strike that also provides
a complete housing to protect the bolt openings.
Builders Hardware: See Architectural
Hardware.
Butt (Hinge): A type of hinge designed
for mortising into the edge of the door and into the rabbet
of a door frame.
Cam (of a cylinder): A rotating piece
attached to the end of the cylinder plug to engage the locking
mechanism.
Cane Bolt: A heavy cane-shaped bolt
with the top bent at right angles; used on the bottom of doors.
Case (of a lock): The box containing
the lock mechanism.
Chain Bolt: A spring bolt actuated
by a chain attached to the spring bolt for application at
the top of the door.
Chain Door Fastener: A device that
limits the opening of a door by means of a chain.
Changes (Key): The different bittings
or tumbler arrangements in a series of locks.
Checking Floor Hinge: A device placed
in the floor that combines top and bottom pivots for hanging
the door with a controlled speed dosing mechanism.
Continuous Hinge (also called Roton Hinge):
A hinge designed to be the same length as the moving part
to which it is applied.
Coordinator: A device used on a pair
of doors to ensure that the inactive leaf is permitted to
close before the active leaf. Necessary when an overlapping
astragal is present and exit devices, automatic or self latching
bolts are used with closers on both door leaves.
Cup Escutcheon: A door plate, for
use on sliding doors, having a recessed panel to afford finger
hold and to contain a flush ring and sometimes a cylinder,
all being flush with the surface of the plate.
Cylinder (of a lock): The cylindrical-shaped
assembly containing the tumbler mechanism and the keyway,
which can be actuated only by the correct keys.
Cylinder Collar: A plate or ring used
under the head of a cylinder.
Cylinder Lock: A lock in which the
locking mechanism is controlled by a cylinder.
Cylindrical (locks and latches): A
term used to describe bored locks, which have a cylindrical
case into which a separate latch bolt case fits.
Cylinder Screw: The set screw that
holds a cylinder in place by preventing the cylinder from
being turned after installation.
Deadbolt (of a lock): A lock bolt
having no spring action nor bevel, and which is operated by
a key or a turn piece.
Deadlock: A lock equipped with a dead
bolt only.
Deadlocking Latch Bolt: A latch bolt
incorporating a plunger that is held in a retracted position
when a door is dosed, thus preventing the bolt from being
retracted by end pressure.
Dogging Device: As used in exit devices,
a mechanism that fastens the cross bar in the fully depressed
position, and also retains the latch bolt or bolts in a retracted
position, thus permitting free operation of the door from
either side.
Door Bolt: A manually operated rod
or bar attached to a door providing means of locking.
Door Closer Bracket: A device whereby
a door closer may be installed on the frame rather than directly
on the door.
Door Closer or Check: A device combining
a spring for closing and a compression chamber into which
the liquid or air escapes slowly, thus providing a means of
controlling the speed of the closing action.
Door Holder: A device that holds a
door open at selected positions.
Door Pivot: A hinging device embodying
a fixed pin and a single joint. Most types include lateral
fastening.
Door Stop: A device to stop the swing
or movement of a door at a certain point. Also an architectural
term defining that part of a door frame against which the
door closes.
Double-Throw Bolt: A bolt that can
be projected beyond its first position into a second, or fully
extended one, thus providing extra security.
Drivers: The upper set of pins in
a pin tumbler cylinder, which, activated by the springs, project
into the plug until raised by insertion of the key.
Drop Escutcheon (or Key Plate): One
having a pivoted plate that covers the key hole.
Drop Ring: A ring handle attached
to a spindle that operates a lock or latch. The ring is pivoted
but remains in a dropped position when not in use.
Dummy Cylinder: A mock cylinder without
any operating mechanism for use where effect is desired.
Dummy Trim: Trim only, without lock;
usually used on the inactive door in a pair of doors.
Dust-Proof Strike: A strike with a
spring plunger that completely fills the bolt hole when the
bolt is not projected.
Dutch Door Bolt: Device for locking
together the upper and the lower leaves of a Dutch door.
Edge Plate: An angle or channel-shaped
guard used to protect the edge of a door.
Edge Pull: A pull mortised into the
edge of a sliding door.
Electric Strike: An electrical device
that permits releasing of the door from a remote control.
Escutcheon (Elongated): A plate long
enough to span a lock case and having holes for knob bushing,
bit key, cylinder, turn knob and similar operating members
as required.
Escutcheon (Key): See Key Plate.
Exit Device: A door-locking device
designed to grant instant exit by pressing on a cross bar
that releases the locking bolt or latch.
Extension Flush Bolt: A flush bolt
in which the connection between bolt head and operating mechanism
is by means of a rod inserted through a hole bored in the
thickness of the door.
Extension Link: A device used to provide
long backsets in bored locks.
Face (of a lock): The exposed surface
that shows in the edge of a door after installation. (See
Front.)
Fast Pin Hinge: One in which the pin
is fastened permanently in place.
Finish Builders Hardware: Hardware
that has a finished appearance as well as a functional purpose
and that may be considered a part of the decorative treatment
of a room or building. Also termed Architectural Hardware,
Finish Hardware and Builders Finish Hardware.
Fire Exit Bolt: See Exit Device.
Floor Closer: A closing device installed
in the floor under a door.
Floor Hinge: A combined pivot hinge
and closing device set either in the floor or in the bottom
of the door. It may be spring type only or may be combined
with liquid control.
Flush Bolt: A door bolt so designed
that when applied it is flush with the face or edge of the
door.
Flush Cup Pull: A pull mortised flush
into a door, having a ring pull that folds flat into the cup
of the pull.
Flush Ring: A flush door pull mortised
in a door, having a ring pull that folds flat into the cup
of the pull.
Foot Bolt: A type of bolt applied
at the bottom of a door and arranged for foot operation. Generally
the bolt head is held up by a spring when the door is unbolted.
Friction Catch: Any catch which when
it engages a strike is held in the engaged position by friction.
Friction Hinge: A hinge designed to
hang a door and hold it at any desired degree of opening by
means of friction control incorporated in the knuckle of the
hinge.
Front (of a lock): The plate through
which the latching or locking bolts project. (See Face.)
Grand Master Key: A key that operates
locks in several groups, each of which has its own master
key.
Guard Bar: A series of two or more
cross bars generally fastened to a common back plate to insure
protection of glass or screen in a door.
Hand (of a lock, etc.): A term used
to indicate the direction of swing or movement, and/or locking
security side of a door.
Handed (locks, etc.): A term used
to indicate that the article is for use only on doors of the
designated hand.
Harmon Hinge: A hinge designed to
swing a door into a pocket at a right angle with the frame.
Hasp: A fastening device consisting
of a loop and a slotted hinge plate, normally secured with
a padlock.
Hinge: Two plates pinned together
by a pin and attached to a door and its frame whereby a door
is supported and is enabled to swing or move.
Hinge Stile (of a door): The stile
to which the hinges are applied as distinguished from the
lock stile.
Horizontal Spring Hinge: A spring
hinge mortised horizontally into the bottom rail of a door
and fastened to the floor and head frame with pivots.
Hub: The part of a lock through which
the spindle passes to actuate the mechanism.
Inactive Door (or leaf): That leaf
of a pair of doors that does not contain a lock, but is bolted
when closed, and to which the strike is fastened to receive
the latch or bolt of the active door.
Indicator Button: A device used in
connection with a hotel lock to indicate whether or not the
room is occupied.
Integral (locks and latches): A term
used to describe a type of mortise lock having cylinder in
the knob.
Invisible Hinge: A hinge so constructed
that no parts are exposed when the door is closed.
Keeper: Synonymous with Strike.
Key Change: The combination of cuts
in a key that enable it to operate the lock for which intended.
Key Plate: A small plate or escutcheon
having only a keyhole.
Keyway: The aperture in lock cylinders
that receives the key and closely engages with it throughout
its length.
Kick Plate: A protective plate applied
on the lower rail of the door to prevent the door from being
marred.
Knob: A projecting handle for operating
a lock.
Knob Shank: The projecting stem of
a knob into which the spindle is fastened.
Knuckle: The enlarged part of a hinge
into which the pin is inserted.
Latch Bolt: A beveled spring bolt,
usually operated by a knob, handle or turn.
Leaf (of a pair of doors): One of
the two doors forming a pair of doors.
Lever Handle: A horizontal handle
for operating the bolt(s) of a lock.
Lever Tumbler: Flat tumbler having
a pivoted motion actuated by the turning of the key and controlling
the locking function.
Lip of a Strike: The projecting part
on which the latch bolt rides.
Lock Rail (of the door): The horizontal
member of a door intended to receive the lock case.
Lockset: A lock, complete with trim,
such as knobs, escutcheons or handles.
Lock Stile (of a door): The stile
to which the lock is applied as distinguished from the hinge
stile.
Loose Joint Hinge: A hinge having
two knuckles; the pin is fastened permanently to one knuckle,
the other contains the pinhole, whereby the two parts of the
hinge can be disengaged by lifting. These hinges are handed.
Loose Pin Hinge: A hinge having a
removable pin to permit the two parts of the hinge to be separated.
Magnetic Catch: A cupboard catch that
uses a magnet to hold the door closed.
Master Key: Operates any quantity
of cylinders of different individual key changes.
Masterkeying: An arrangement of cylinders
having individual key changes, which permits them all to be
operated by a simple key called a master key.
Mono Lock: See Preassembled Lock.
Mop Plate: A narrow plate similar
to a kick plate, of sufficient height to protect against the
swish of the mop.
Mortise: A cavity made to receive
a lock or other hardware; also the act of making such a cavity.
Mortise Bolt: A door bolt designed
to be mortised into a door rather than applied to its surface.
Mortise Lock (or Latch): A lock designed
to be installed in a mortise rather than applied to the door's
surface.
Mullion: A fixed or movable post dividing
an opening vertically.
Nightlatch: An auxiliary lock having
a spring latch bolt and functioning independently of, and
providing additional security to, the regular lock of the
door.
Overhead Concealed Closer: A closer
concealed in the head frame with an arm connecting with the
door at the top rail.
Panic Exit Device: See Exit Device.
Paracentric: A term used in connection
with cylinder plugs having projections on the sides of the
keyway that extend beyond the vertical center line of the
keyway.
Pin Tumblers: Small sliding pins in
a lock cylinder, working against coil springs and preventing
the cylinder plug from rotating until the pins are raised
to the proper alignment by bitting of key.
Pivot: See Door Pivot.
Plug (of a cylinder): The round part
containing the keyway and rotated by the key to transmit motion
to the bolt(s).
Preassembled Lock: A lock that has
all the parts assembled as a unit at the factory, and when
installed in a rectangular notch cut into the door edge, requires
little or no disassembly.
Prison Lock: A heavy lock designed
especially for use on jail cells.
Push Plate: A plate applied to the
lock stile to protect the door against soiling and wear
Quadrant (Dutch Door): A device to
fasten together the upper and the lower leaves of a Dutch
door.
Rabbet: A term used to describe the
abutting edges of a pair of doors so shaped as to provide
a tight fit. One half of the edge projects beyond the other
half, usually 1/2 . Also used to define that portion of a
door frame into which the door fits.
Rabbeted Lock (or Latch): A lock in
which the face conforms to the rabbet found on a rabbeted
door.
Rail (of a door): A horizontal member
that pins the stiles. May be exposed as in a paneled door,
or concealed as in a flush door
Reinforcing Unit: A metal box-shaped
reinforcement for use in a metal door in which a bored lock
is to be installed. It provides both vertical and horizontal
latch support.
Reverse Bevel: See Bevel.
Reversible Lock: A lock which, by
reversing the latch bolt, may be used by any hand. On certain
types of locks, other parts must also be changed.
Rigid Lock: See Preassembled Lock.
Rim: A term indicating articles of
hardware designed for application to the surface of doors
and windows.
Roller Latch: A friction door latch
employing a roller latch head under spring tension, which
engages a strike having a recess formed to receive the roller.
Roller Strike: A strike having a rolling
member at the point of latch bolt contact to minimize friction.
Rose: A trim plate attached to the
door under the knob. It sometimes acts as a knob bearing.
Rounded Front: A lock or bolt front
conforming to the rounded edge of a double acting door. The
standard radius is 4" (101.6 mm).
Screwless Knob: A knob attached to
a spindle by means of a special wrench as distinguished from
the more commonly used side knob screw.
Screwless Rose: A rose with concealed
method of attachment.
Shank (of a knob): The projecting
stem of a knob into which the spindle is fastened.
Side Knob Screw: A set screw used
to fasten a knob to a spindle.
Spindle (of a knob): The bar or tube
connected with the knob or lever handle that passes through
the hub of the lock or otherwise engages the mechanism to
transmit the knob action to the bolt(s).
Split Astragal: An astragal that is
split through the middle, allowing each door leaf to operate
independently.
Spring Hinge: A hinge containing one
or more springs to move the door into the desired position.
It may be either single or double acting.
Stile (of a door): A vertical member
of the door structure; each door has two, a lock stile and
a hinge stile.
Stop (of a lock): The button, or other
small device, that serves to lock the latch bolt against the
outside knob or thumb piece or unlock it if locked. Another
type holds the bolt retracted.
Store Door Handle: A heavy grip or
pull mounted on sectional or elongated plates and provided
with a thumb piece to operate the latch trip of a store door
lock.
Strap Hinge: A surface hinge of which
one or both leaves are of considerable length.
Strike: A metal plate or box that
is pierced or recessed to receive the bolt or latch when projected.
Sometimes called Keeper.
Surface Hinge: One having both leaves
surface applied.
Swinging Latch Bolt: A bolt that is
hinged to a lock front and is retracted with a swinging rather
than a sliding action. Sometimes called Hinged Latch Bolt.
Swivel Spindle: A spindle having a
joint midway in its length to permit the knob at one end to
be made rigid by the stop works while the other end is free
to operate.
T Handle: A cross handle for actuating
the bolt of a lock and used in place of a knob.
T Hinge: A surface hinge with the
short member attached to the jamb and the long member attached
to the door.
Template Hardware: A term indicating
any item of hardware that is made to template; that is, exactly
matching the master template drawing as to spacing of all
holes and dimensions.
Thimble: The socket or bearing attached
to an escutcheon plate in which the end of the knob shank
rotates.
Three-Point Lock: A device sometimes
required on three-hour fire doors to lock the active leaf
of a pair of doors at three points.
Threshold: A strip fastened to the
floor beneath a door, usually required to cover the joint
where two types of floor material meet.
Throw (of a deadbolt or latch bolt):
Measurement of the maximum projection when bolt is fully extended.
Thumb Piece (of a handle): The small
pivoted part above the grip of a handle to be pressed by the
thumb to operate a latch bolt.
Transom Bar: That part of a door frame
that separates the top of a door or a window from the bottom
of the transom
Transom Catch: A fastener applied
to a transom and having a ring by which the latch bolt is
retracted.
Transom Chain: A short chain used
to limit the opening of a transom; usually provided at each
end with a plate for attachment.
Transom Lift: A vertically operated
device attached to a door frame and transom by which the transom
may be opened or closed.
Tubular Lock (or Latch): A type of
bored lock
Tumbler: A guard or obstruction that
prevents operation of a bolt except by insertion of the proper
key
Turn Piece: A small knob, lever or
tee turn with spindle attached for operating the deadbolt
of a lock or a mortise bolt.
Two-Point Latch: A device sometimes
required on three-hour fire doors to lock the inactive leaf
of a pair of doors at top and bottom.
Unit Lock: See Preassembled Lock.
Universal: A term used to describe
a lock, a door closer or other device that can be used on
doors of any hand without change.
Vertical Spring Pivot Hinge: A spring
hinge mortised into the heel of a door and fastened to the
floor and head with pivots.
Ward: An obstruction projecting from
the lock case of side of a keyhole intended to prevent entrance
or rotation of an improperly cut key.
|
