After hours depository
a locked receptacle for the deposit of items after regular hours.
Alarm system
a system of electrical and/or electronic components which detect and report dangers, such as fire or intrusion.
Assembly occupancy
buildings or areas which are designated as places of assembly according to life safety and building codes.
Authority having jurisdiction
the person, usually within a municipality, charged with the application and interpretation of local life safety codes.
Automatic teller machine
a device for dispensing cash, receiving deposits and performing other banking functions upon presentation of the proper authorization.
Barrier free
having to do with the absence of access restrictions for the handicapped.
Bicycle padlock
a padlock with sufficient shackle clearance to secure a bicycle.
Box of wards
a complete unit of intricate wards installed in or on a lock case.
Card reader
a device which interprets the coding resident on cards.
Central station
a location designed for the sole purpose of processing status signals for multiple alarm systems.
Electrified lockset
a lock which is controlled electrically.
End ward
a ward which prevents complete insertion and/or rotation of an incorrect key by forming an obstruction at the end of the key.
Entry/exit delay
an alarm or access control feature which allows a specific time lapse between the activation of a switch and the activation of a secondary component.
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.
Fail safe
a feature of a security device designed to release, for safety purposes, during a power loss.
a projection on a lock bolt which prevents movement of the bolt unless it can enter gates of properly aligned tumblers. Also any locking element other than a sidebar or shackle designed to enter a tumbler's gate.
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 alarm
a system designed to detect and report conditions which may indicate presence of a fire.
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.
Frangible shackle
a padlock shackle designed to be broken easily.
Frangible shackle padlock
a padlock equipped with an easily broken shackle.
Hard wire system
a system in which the components are directly connected to the central control unit.
Horizontal exit
an exit to the outside of an area of refuge on the same or nearly the same level.
Hybrid locking system
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.
Jimmy proof
pertaining to a lock having a bolt which interlocks with its strike.
Key interchange
an undesirable condition, usually in a master key system, where a key unintentionally operates a cylinder or lock.
Key manipulation
manipulation of an incorrect key in order to operate a lock or cylinder.
any specification for how a cylinder or group of cylinders are or are to be combinated in order to control access.
Keying conference
a meeting of the end user and the key system supplier at which the keying and levels of keying, including future expansion, are determined and specified.
Keying schedule
a detailed specification of the keying system listing how all cylinders are to be keyed and the quantities, markings, and shipping instructions of all keys and/or cylinders to be provided.
Master key system
any keying arrangement which has two or more levels of keying. A keying arrangement which has exactly two levels of keying.
Master wafer
a ward used in certain binary type disc tumbler key-in-knob locks, see also "master pin" and "stepped tumbler".
Matrix format master keying
a method of generating combinations and assigning key symbols in a master key system through the use of a matrix.
Night latch
a rim mounted auxiliary latch bolt.
Non-fail safe
a feature of a security device designed to remain engaged, for security purposes during a power loss.
Panic button
any switching device in an alarm system designed to be activated by a person in a panic situation. It creates an immediate alarm condition.
of or pertaining to a keyway with one or more wards on each side projecting beyond the vertical center line of the keyway to hinder picking. Of or pertaining to a key blank made to enter such a keyway.
Personal identification number
a series or numbers and/or letters associated with a particular individual as a means of identification.
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.
Positive locking
the condition brought about when a key cut which is too high forces its tumbler into the locking position. This type or locking does not rely on gravity or spring pressure.
Random master keying
any undesirable process used to master key which uses unrelated keys to create a system.
to unlock a plug from its shell by striking sharp blows to the spring side of the cylinder while applying tension to the plug. To unlock a padlock shackle from its case by striking sharp blows to the sides in order to disengage the locking dogs.
to decode a lock combination visually without disassembly of the lock or cylinder.
to change the combination of a lock, cylinder, or key.
to rekey by installing a different core.
Register number
a reference number, typically associated by the lock manufacturer to an entire master key system. A blind code assigned by some lock manufacturers to higher level keys in a master key system.
to change the existing combination of a cylinder or lock.
Remote release
a mechanism for permitting the unlocking of any lock device at a distance from the device.
of or pertaining to a keyway and corresponding key blank whose sale and/or distribution is limited by the lock manufacturer in order to reduce unauthorized key proliferation.
Rotating constant
one or more cuts in a key of any level which remain constant throughout all levels and are identical to the top master key cuts in their corresponding positions. The positions where the top master key cuts are held constant may be moved, always in a logical sequence.
Rotating constant method
a method used to progress key bittings in a master key system, wherein at least one cut in each key is identical to the corresponding cut in the top master key. The identical cuts are moved to different locations in a logical sequence until each possible planned position has been used.
Sally port
an access control area with doors or gates secured by interlocks such that only one may be opened at a time.
Secret gate latch
a small keyless rim latch, which when properly installed, is operated pressing a concealers actuator.
Security collar
a protective cylinder collar.
Sequence of progression
the order in which bitting positions are progressed to obtain change key combinations.
Shut out model
the state of a hotel function lockset which prevents operation by all keys except the emergency master key, display key, and some types or shut out keys.
a spring loaded device which closes upon the removal of a cylinder tailpiece, protecting a locking device from being manipulated. A key in the form of a sickle inserted through a hole in a door to actuate a bolt on the opposite side of the door.
Side ward
a ward which prevents entry of an incorrect key into a non-cylinder lock.
Simplex key section
a single independent key section which cannot be used in a multiplex key system.
Spare tire lock
a lock designed to prevent removal of a vehicle's spare tire.
Stop works button
a one or two-piece stop works activator.
Theoretical key changes
the total possible number of different combinations available for a specific cylinder or lock mechanism.
Throat ward
an obstruction formed in a lock's case or horn at the point of key entry which prevents key rotation.
a generally flat, projecting latch actuator found above a grip handle and depressed by the thumb.
Touch pad
an exit device actuator with a paddle shape. A remote door opener activator, typically electronic, which facilitates handicap access.
exposed components of a lockset or latchset which allow operation, enhance appearance or provide protection.
UL listed
listed in a directory as having passed specific Underwriters Laboratories testing.
of or pertaining to a cylinder which is or is to be supplied without keys, tumblers and springs. Of or pertaining to a lock, cylinder or key in which the combination has not been set.
Uncontrolled cross keying
a condition in which two or more different keys under different higher level keys operate one cylinder by design; e.g., XAAI operated by AB, ABI. NOTE: This condition severely limits the security of the cylinder and the maximum expansion of the system, and often leads to key interchange.
Vehicle Anti-Theft System
an electronic system in some General Motors vehicles which uses a resistor pellet of varying value imbedded in a mechanical ignition key.
Visual key control
a specification that all keys and the visible portion of the front of all lock cylinders are stamped with standard keying symbols.
a usually stationary obstruction in a lock or cylinder which prevents the entry and/or operation of an incorrect key.
Ward cut
a modification of a key which allows it to bypass a ward.
having one or more wards.
Window bug
an alarm system component designed to detect breaking glass.