160 prep
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
a standard door preparation which consists of a 2- 1/8" cross-bore with a 2-3/4" backset and a 1.
Active leaf
the single door of a pair where the active or locking hardware is mounted.
a device usually connected to a cylinder. When activated may cause a lock mechanism to operate.
Adjustable mortise cylinder
any mortise cylinder whose length can be adjusted for a better fit in doors of varying thickness.
Architectural hardware
hardware used in building construction, especially those used in connection with doors.
Automatic deadbolt
a deadbolt designed to extend itself fully when the door is closed.
Automatic flush bolt
a flush bolt designed to extend itself when both leaves of the pair of doors are in the closed position.
Auxiliary lock
any lock installed in addition to the primary lockset.
Back plate
a thin piece of metal, usually with a concave portion. Used with machine screws to fasten certain types of cylinders to a door.
the distance between the center of a cross-bore and the bolt edge of a door or drawer.
Bell Box
the protective enclosure for a bell or other alarm sounding device.
Bicycle padlock
a padlock with sufficient shackle clearance to secure a bicycle.
Bored lock
a lock for a door prepared with one or more cross-bores and one or more edge-bores.
Bramah type lock
a lock or cylinder using a mechanism with sliders, normally arranged in a circle.
Build-up dimension
the distance between two different shear lines, as expressed in units of the manufacturer's increment or as an actual measurement. The dimension of the buildup 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.
Cam lock
a complete locking assembly in the form of a cylinder whose cam is the actual locking bolt.
Chubb shackle
a hinged shackle with a pierced hole for the bolt in its movable end.
Closed gated
pertaining to a lever tumbler whose gate is pierced into the body of the tumbler. The lever surrounds the fence in both the locked and unlocked positions.
Closed knob
a knob without an opening in its face.
Closet latch
a latchset which has a turning device with minimum projection in place of the inside knob or lever.
Closet spindle
a spindle with a thumbturn attached to one end.
Combination wafer
a type of disc tumbler used in certain binary type disc tumbler key-in-knob locks. Its presence requires that a cut be made in the position of the operating keys.
Complementary keyway
usually a disc tumbler keyway used in master keying. It accepts keys of different sections whose blades contact different bearing surfaces of the tumblers.
Composite keyway
a keyway which has been enlarged to accept more than one key section, often key sections of more than one manufacturer.
Concealed shell cylinder
a specially constructed (usually mortise) cylinder. Only the plug face is visible when the lock trim is in place.
Concealed vertical rod device
a vertical rod exit device whose rods and header/threshold bolts are concealed within the door.
Concrete case
an enclosure for mounting a floor closer.
Construction core
an interchangeable or removable core designed for use during the construction phase of a building. The cores are normally keyed alike and upon completion of construction, they are to be replaced by the permanent system's cores.
Construction master keyed
of or pertaining to a cylinder which is or is to be operated temporarily by a construction master key.
Control chamber
in an interchangeable or removable core, any chamber which has a control shear line which is different from the operating shear line.
Control dimension
in certain interchangeable or removable cores, the distance between the operating shear line and the control shear line. Expressed either in units of the increment or as a measurement.
in conjunction with a pair of doors, a device designed to cause the inactive leaf to close first.
a complete unit, often with a figure 8 shape, which usually consists of the plug, shell, tumblers, springs, plug retainer and spring covers. It is primarily used in removable and interchangeable core cylinders and locks.
Cross keying
the deliberate process of combinating a cylinder (usually in a master key system) to two or more different keys which would not normally be expected to operate it together.
of or pertaining to a key section or keyway which usually resembles a plus sign (+) or the letter "X".
Curved lip strike
a strike so shaped as to effect smoother function of the latch while the door is closing.
Disc tumbler
a flat tumbler which must be drawn into the cylinder plug by the proper key so that none of its extremities extends into the shell. A flat, usually rectangular tumbler with a gate which must be aligned with a sidebar by the proper key.
to place an exit device in the hold-back mode. In marine applications the latch for a hatch.
Dogging cylinder
a key operated cylinder used to dog an exit device.
Door control
any device which controls the opening, closing or position of a door.
Door silencer
a bumper installed in the jamb stop to quiet the closing of a door.
Double cylinder
pertaining to a lock with two keyed cylinders.
Double cylinder deadlock
a deadbolt lock whose bolt may be operated by a key from either side.
a shape consisting of two opposing arcs and two opposing flats.
pertaining to a latch or bolt with a round face.
Drop bolt
a lock with an interlocking bolt which moves vertically and may enter loops on the strike.
Dummy cylinder
a non-functional facsimile of a rim or mortise cylinder used for appearance only, usually to conceal a cylinder hole.
Dustproof cylinder
a cylinder designed to prevent foreign matter from entering either end of the keyway.
a hole drilled into the edge of a door where a bored or interconnected lockset is to be installed.
Ejector hole
a hole found on the bottom of certain interchangeable cores under each pin chamber. It provides a path for the ejector pin.
Electrified lockset
a lock which is controlled electrically.
Exit only
refers to hardware designed to secure an opening in such a way as to permit exit at all times but prevent entry at all times.
File cabinet lock
any lock used on a file cabinet. Also a plunger lock cylinder for a gang lock normally used in a file cabinet.
Fire door
a door constructed to provide a specific degree of fire protection.
Fire door assembly
any combination of a fire door, frame, hardware and other accessories, that together provide a specific degree of fire protection to the opening.
Fire exit hardware
exit devices which may legally be installed on fire doors. Distinguished from other exit devices because it is labeled for both fire and panic and has no means of locking the latch in a retracted position.
Flat goods
ancillary architectural hardware such as push plates, mop plates, stretcher plates, kick plates, etc.
Flexible head mortise cylinder
an adjustable mortise cylinder which can be extended against spring pressure to a slightly longer length.
Four column progression
a process wherein key bittings are obtained by using the cut possibilities in four columns of the key bitting array.
Frangible shackle
a padlock shackle designed to be broken easily.
Frangible shackle padlock
a padlock equipped with an easily broken shackle.
Full mortise
pertaining to a method of installation in which only the face plate and trim is exposed. The lock case is installed in a pocket in the door or drawer. To make a rectangular pocket in a door or drawer that is only open on the edge of the door or drawer.
Fusible link arm
a door closer arm which includes a mechanism for holding a door open. This mechanism has an element that when subjected to certain temperatures, melts and allows the door to close.
Gang lock
a locking mechanism with multiple bolts which locks different openings simultaneously by a single action.
Garage door lock
a rim lock mechanism designed for use on an overhead door, has a spring loaded bolt which automatically locks the door's bolt mechanism.
part of a key machine which follows the cuts of a pattern key or template during duplication. Or part of a flat key lever lock which connects the nose to the foot and supports the key blade.
Hand change
pertaining to a combination lock in which the wheels must be removed in order to change the combination
pertaining to hardware which is manufactured only for application on doors with a specific orientation.
Hardware schedule
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.
a hinged metal strap designed to be passed over a staple and secured in place.
Heel and toe locking
describes a padlock which has locking dogs at both the heel and toe of the shackle.
Hinge stile
the vertical edge of a door where hinges are installed.
Hobbs shackle
a hinged shackle with a notch for the bolt in its movable end.
Hold open arm
a door closer arm with the capability of maintaining the door in the open position.
Holding fixture
a device which holds cylinder plugs, cylinders, housings, and/or cores to facilitate the installation of tumblers, springs and/or spring covers.
Ignition lock
the lock assembly associated with a vehicle's engine on-off switch and starter.
a usually uniform increase or decrease in the successive depths of a key way which must be matched by a corresponding change in the tumblers.
Index (of a combination lock dial)
the mark outside the dial ring or a combination lock used as a reference point.
a device which provides visual evidence that a deadbolt is extended or that a lock is in the shut out mode.
Interchangeable core
a key removable core which can be used in all or most of the core manufacturer's product line. No tools (other than the control key) are required for removal of the core.
Interconnected lockset
a lockset whose trim provides a means of simultaneous retraction of two or more bolts which may also be operated independently.
Intermittent duty
of or pertaining to an electric strike or lock not designed to be energized for extended periods of time.
Jumbo cylinder
a rim or mortise cylinder of a 1-1/2" diameter.
Key bitting array
a matrix (graphic) display of all possible bittings for change keys and master keys as related to the top master key.
Key bitting punch
a manually operated device which stamps or punches the cuts into the key blade, rather than grinding or milling them.
Key bitting specifications
the technical data required to bit a given (family of) key blanks to the lock manufacturer's dimensions.
Key change
referring to a lock in which the combination can he changed through the use of a special key or tool without disassembling the lock.
Key changeable
of or pertaining to a lock or cylinder which can be recombinated without disassembly, by the use of a key. The use of a tool may also be required.
Key coding machine
a key machine designed for the production of code keys. It may or may not also serve as a duplicating machine.
Key cut profile
the shape of a key cut, including the cut angle and the cut root shape.
Key cuts
the portion of the key blade which remains after being cut and which aligns the tumblers.
Key duplicating machine
a key machine which is designed to make copies from a pattern key.
Key gauge
a usually flat device with a cutaway portion indexed with a given set of depth or spacing specifications. It is used to help determine the combination of a key.
Key interchange
an undesirable condition, usually in a master key system, where a key unintentionally operates a cylinder or lock.
Key machine
any machine designed to cut keys.
Key milling
the grooves machined in to the length of the key blade to allow its entry into the keyway.
Key pull position
any position of the cylinder plug at which the key can be removed.
Key Records Department
the department which is responsible for generating and issuing all lock and key combinations and maintaining records of them.
Key retaining
of or pertaining to a lock which must be locked before its key can be removed. Pertaining to a cylinder or lock which may prevent removal of a key without the use of an additional key and/or tool.
Key section
the exact cross sectional configuration of a key blade as viewed from the bow toward the tip.
Key switch
a switch operated by a keyed lock mechanism which may be an integral part of the switch assembly.
Key-in-knob lockset
any lockset with a key operated cylinder in one or more knobs.
Key-in-lever lockset
any lockset with a key operated cylinder in one or more lever handles.
Keyhole lock
a lock which blocks the keyhole of a bit key lock.
any specification for how a cylinder or group of cylinders are or are to be combinated in order to control access.
Keying kit
a compartment container which holds an assortment of tumblers, springs and/or other parts.
an L-shaped handle assembly which may be lockable.
L-handle lock
a cabinet lock with an L-shaped handle.
Laminated padlock
a padlock whose case is constructed of separate plates normally riveted together.
a mechanical device which automatically keeps a door closed until a deliberate action is used to retract it.
a non-locking device which contains only a latch bolt, a means of operating said latch and the required trim.
Layout tray
a container used to organize cylinder parts during keying or servicing.
Levels of keying
the divisions of a master key system organized into hierarchies of access.
Lever pack
a set of lever tumblers.
any device which prevents access or use by requiring special knowledge or equipment.
Lock service package
a kit offered by the manufacturer or distributor of a product which contains what he deems required to properly service the product.
Lock stile
the vertical edge of a door designed for lock or latch installation.
Locker lock
a cabinet lock designed specifically for use on lockers.
a locking device, complete with trim, mounting hardware and strike.
Master disc
a special disc tumbler with multiple gates to receive a sidebar.
Master ring lock/cylinder
a lock or cylinder equipped with a master ring.
Metal desk lock
a cabinet lock with a vertically sliding bolt located at the rear of the cylinder.
Meter lock
a padlock whose shackle consists of a single removable post, designed for lucking utility meters or valves. Any of several small devices specifically designed to lock utility meters or valves and which require either a key or special wrench for removal.
a vertical center post in the frame of a pair of doors.
Multiple gating
a means of master keying by providing a tumbler with more than one gate.
Multiplex key system
a series of different key sections which may be used to expand a master key system by repeating bittings on additional key sections. The keys of one key section will not enter the keyway of another key section. This type of system always includes another key section which will enter more than one, or all of the keyways. A keying system which uses such keyways and key sections.
Non key retaining
of or pertaining to a lock whose key can be removed in both the locked and unlocked positions.
Odometer method
a means of progressing key bittings using a progression sequence of right to left.
One column progression
a process wherein key bittings are obtained by using the cut possibilities in one column of the key bitting array.
Operating shear line
any shear line which allows normal operation of a cylinder or lock.
Overhead stop
a door stop that contacts the door near the top.
the set of tumblers in a lever tumbler or combination lock.
a detachable and portable lock with a shackle which locks into its case.
Pin kit
a type or keying kit for a pin tumbler mechanism.
Pinning chart
a numerical diagram which indicates the sizes and order of installation of the various pins into a cylinder. The sizes are usually indicated by a manufacturer's reference number which equals the quantity of increments a tumbler represents.
Plunger lock
any of various spring-loaded locks or cylinders which move in or out to accomplish a locking function.
Pop out lock
a plunger lock usually used on vending machines to prevent operation of a T-handle.
Pre-assembled lockset
a lock designed to be installed into a cutout in the edge of a door. The lock body and most or all of its trim need no further assembly other than securing it to the door.
the location and dimensions of the cut outs and reinforcing in a door or frame required to accept a piece of hardware. To prepare a door or frame for installation of a lock or other hardware.
to select possible key bittings from the key bitting array, usually in numerical order.
a logical sequence of selecting possible key bittings, usually in numerical order from the key bitting array.
Progression column
a listing of the key bitting possibilities available in one bitting position as displayed in a column of the key bitting array.
any bitting position which is progressed rather than held constant.
of or pertaining to a keyway anti key section assigned exclusively to one end user by the lock manufacturer. It may also be protected by law from duplication.
Pullman keeper
a type of keeper which is shaped to operate with the radiused contour of a Pullman latch.
Ratchet lock
any lock which incorporates a ratchet device allowing locking in more than one position.
to change the combination of a lock, cylinder, or key.
Removable shackle
referring to a type of padlock which is unlocked by removing the shackle from the case.
pertaining to hardware which is manufactured in a way which allows field assembly or adjustment to accommodate installation on doors with different orientations.
Rim lock
a lock or latch typically mounted on the surface of a door or drawer.
Round back
pertaining to a rim cabinet lock whose mounting flanges and case form the general shape of a circle when viewed from the back.
Scandinavian padlock
a cast case padlock with an elliptical cross section. The locking mechanism is a set of rotating disc tumblers which engage notches in the cast shackle and may be rotated by the angled cuts cast on the key.
Screen door lock
a lock designed for the thin stiles typically found on screen and storm doors.
Screwless knob
a mortise lock knob assembly secured to the spindle without screws.
Screwless rose
a mortise lock rose installed without screws.
Series wafer
a type of disc tumbler used in certain binary type disc tumbler key-in-knob locks. Its presence requires that no cut be made in that position on the operating key.
a bracket which attaches the arm of a door closer to the door or frame. The surface mounted case and guide components of an exit device. A mortise lock component which transfers pivoting motion of a thumbpiece to linear movement of the latch bolt.
Showcase lock
normally a ratchet lock or plunger lock used on a by-passing door.
Shunt switch
a maintained contact switch, often key operated.
Simplex key section
a single independent key section which cannot be used in a multiplex key system.
Simultaneous retraction
a feature which allows retraction of both the deadbolt and latchbolt in the same operation.
Single cylinder
pertaining to a lock with key operation from only one side.
Spare tire lock
a lock designed to prevent removal of a vehicle's spare tire.
Split spindle
a multi-piece spindle which allows a knob or lever to be installed on only one side of a door.
Spring cover
a device for sealing one or more pin chambers.
Square back
pertaining to a rim cabinet lock whose mounting flanges and case form the general shape of a square.
Stepped tumbler
a special (usually disc) tumbler used in master keying. It has multiple bearing surfaces for blades of different key sections.
Stop (of a door)
the projecting portion of a door frame upon which the door rests when closed.
Stop works button
a one or two-piece stop works activator.
Switch lock
a lock which incorporates an electrical switch as an integral part of its construction. A large padlock designed for use on railroad switches.
a pattern used to mark cutout locations for hardware installation.
the distance a bolt or latch projects from the faceplate or case of a lock in the extended position.
Throw member
an intermediate actuator which engages the rear of the plug to transfer motion to a cam, tailpiece or other actuator.
a pivoting one-piece stop works activator.
the deviation allowed from a given dimension.
Top jamb mount
surface application of a door closer body directly to the header.
Touch bar
a type of exit device actuator which typically does not pivot and retracts the bolt with a minimum amount of pressure.
exposed components of a lockset or latchset which allow operation, enhance appearance or provide protection.
Tubular lockset
a bored lockset whose latch or bolt locking mechanism is contained in the component installed into the edge bore.
Two step progression
a progression using a two increment difference between bittings of a given position.
Warnock Hersey
an independent testing laboratory.
Wheel pack
an assembly of combination wheels.