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Locks |
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Safes |
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Gates |
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Doors |
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Intercom Systems |
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Security Systems |
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Surveillance |
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Glossary |
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Locksmith Glossary S |
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A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
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- S/A
abb. sub-assembled
- safe
- n. a substantial, secure container with varying degrees of security and/or fire resistance, used to store valuables against fire or theft
- safe deposit
- n. a typically key accessed container that requires dual key operation, usually located inside a vault
- safe deposit function
- adj. an operational characteristic of a lock which requires two separate keys working in tandem to open the lock
- safe deposit lock
- n. a lock that typically requires two separate keys to access a container
- safe door
- n. that portion of a safe used to gain access to the contents of the safe in a normal day to day manner
- sally port
- n. an access control area with doors or gates secured by interlocks such that only one may be opened at a time
- sash lock
- n. a type of window lock
- SAVTA
- abb. Safe and Vault Technicians Association
- SBCCI
- abb. Southern Building Code Congress International
- scalp
- n. a thin piece of metal which is usually crimped or spun onto the front of a cylinder. It determines the cylinder's finish and may also serve as the plug retainer.
- Scandinavian padlock
- n. 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.
- scan tool
- n. an automotive diagnostic tool used to read fault codes, and in some cases configure or program various modules or keys
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- screen door lock
- n. a lock designed for the thin stiles typically found on screen and storm doors
- screw change (wheel)
- n. a perforated tumbler that may have its combination set by placement of a screw in one of the perforations
- screwless knob
- n. a mortise lock knob assembly secured to the spindle without screws
- screwless rose
- n. a mortise lock rose installed without screws
- SDB
- abb. safe deposit box
- seal
- n. a single use device intended to give recognizable evidence to the physical opening or entry of a door, container, or space
- second generation duplicate
- n. a key reproduced from a first generation duplicate
- secondary key
- n. a key which operates certain locks on a vehicle, but not the ignition lock
- secret gate latch
- n. a small keyless rim latch, which when properly installed, is operated by pressing a concealed actuator
- sectional trim
- n. a design that uses two or more escutcheons on the same side of a door for a single lock
- security collar
- n. 1. a protective cylinder collar, see also "cylinder guard"
- security leg keyway
- n. a key section and keyway design that incorporates two non-curved planes of the key blade intersecting at an angle between 1 and 89 degree
- segmented follower
- n. a plug follower sliced into sections which are introduced into the cylinder shell one at a time. It is typically used with profile cylinders.
- selective key system
- n. a key system in which every key has the capability of being a master key. It is normally used for applications requiring a limited number of keys and extensive cross keying.
- selective master key
- n. an unassociated master key which can be made to operate any specific lock(s) in the entire system in addition to the regular master key(s) and/or change key(s) for the cylinder without creating key interchange
- self closing
- adj. pertaining to doors or covers which have a continuous force applied in the closing direction
- semi-automatic key machine
- n. a machine capable of duplicating keys with limited manual operations
- sequence of progression
- n. the order in which bitting positions are progressed to obtain change key combinations
- series wafer
- n. 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(s)
- serrated fence
- n. a fence with "V" shaped notches on a contact surface to inhibit manipulation
- serrated tumbler
- n. 1. a disk tumbler with "V" shaped notches in its sides that do not allow operation, 2. a lever tumbler which has "V" shaped notches in the contact end near the gate, 3. a pin tumbler with "V" shaped grooves around its circumference, 4. a combination wheel with "V" shaped notches along its outside diameter
- service code
- n. in an electronic lock, a factory set or user set code or combination that will open the lock one time
- service hole
- n. 1. an aperture aligned with each chamber, providing a path for the ejector pin to drive the entire pin stack from an IC, 2. a hole in a cylinder shell intended to provide access for rekeying without disassembly of the cylinder
- service panel
- n. the back cover of a safe door which must be opened or removed to allow access for repairs
- servicemark keyway
- n. any keyway whose shape has been configured to receive protection under trademark or servicemark law
- set screw
- n. a screw used to fasten a component in a fixed position relative to another component
- set-up key
- n. a key used to calibrate some types of key machines
- set-up plug
- n. a type of loading tool shaped like a plug follower. It contains pin chambers and is used with a shove knife to load springs and top pins into a cylinder shell.
- seven column progression
- n. a process wherein key bittings are obtained by using the cut possibilities in seven columns of the key bitting array
- seven pin master key
- n. a master key for all combinations obtained by progressing seven bitting positions
- sex bolt
- n. a nut and bolt set used to through bolt, with a closed nut basically flush with the mounting surface creating the appearance of a carriage bolt
- SFIC
- abb. Small Format Interchangeable Core
- shackle
- n. 1. the part of a padlock, which passes through an opening in an object or fits around an object and is ultimately locked into the case 2. the portion of a restraint which fits around the wrist, ankle, neck, waist or thumb
- shackle retaining pin
- n. a pin which keeps an unlocked shackle heel in the case
- shackle spring
- n. a spring which pushes the shackle into the open position when the padlock is unlocked
- shank
- n. 1 the part of a bit key between the bow and the stop; or, if there is no shoulder stop, the part between the bow and the near side of the bit, 2. a smaller diameter portion of a knob that is positioned between the larger portion of the knob and the rose or the door surface
- SHDA
- abb. Security Hardware Distributors Association (formerly NLSA)
- shear-head bolt
- n. a threaded fastener which is designed to have the head break off when the correct torque is reached
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- shear line
- n. a location in a cylinder at which specific tumbler surfaces must be aligned, removing obstruction(s) which prevented the plug from moving
- shell
- n. the part of the cylinder which surrounds the plug and which usually contains tumbler chambers corresponding to those in the plug
- shim
- 1. n. a thin piece of material used to unlock the cylinder plug from the shell by separating the pin tumblers at the shear line, one at a time 2. v. to unlock a cylinder plug from its shell by using a shim
- shipping pin
- n. a pin or block used to prevent relockers from accidentally firing during shipment of a safe or vault door
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- shoe
- n. 1. a bracket which attaches the arm of a door closer to the door or frame 2. the surface mounted case and guide components of an exit device 3. a mortise lock component which transfers pivoting motion of a thumbpiece to linear movement of the latch bolt
- shoulder
- n. any key stop other than a tip stop, see also "bow stop"
- shouldered chamber
- n. a pin chamber with an internal shelf that limits travel of a complementarily shaped bottom pin
- shouldered pin
- n. a pin tumbler shaped as to prevent it from fully entering an unoccupied keyway or limit its travel within a pin chamber
- shouldered spindle
- n. in a safe lock, a spindle with a larger uniform diameter toward outside to prevent punching the spindle into the container
- shove knife
- n. a tool used with a set-up plug which pushes the springs and pin tumblers into the cylinder shell
- showcase lock
- n. normally a ratchet lock or plunger lock used on bypassing doors
- shrouded shackle
- n. a shackle which is protected from cutting or tampering by design or by the use of secondary shields
- shunt switch
- n. a maintained contact switch, often key operated
- shut out key
- n. usually used in hotel keying systems, a key which will make the lock inoperative to all other keys in the system except the emergency master key, display key, and some types of shut out keys
- shut out mode
- n. the state of a hotel function lockset which prevents operation by all keys except the emergency master key, display key, and some types of shut out keys
- shutter
- n. 1. a spring-loaded device which closes upon the removal of a cylinder tailpiece, protecting a locking device from being manipulated, 2. a spring-loaded device which covers a cylinder keyway when the key is not in it, also see appendix
- shutter spring
- n. a spring which returns the shutter on a lock to the closed position
- sickle key
- n. 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 milling slotter
- n. a key machine cutting wheel with a squared edge that can cut on the side as well as the periphery of the wheel
- side sheath
- n. a portion of a multi-part pin tumbler lock plug used to complete the shear line fully around the plug
- side ward
- n. a ward which prevents entry of an incorrect key into a non-cylinder lock
- side ward cut
- n. a cut made into a key to bypass a side ward
- sidebar
- n. a cylinder locking member mounted longitudinally in a plug, which engages multiple
tumblers
- sidebar lock
- n. a lock mechanism which incorporates a sidebar
- sidecode variant
- n. a master keying style of pin tumbler locks which uses the keying capabilities of the secondary security technology to effect master keyed locking. Obtaining a single key in the system does not reveal the same secondary combination of all keys.
- sidewinder key
- n. typically an automotive key with a bitting(s) milled into the widest side(s) of the key blade with an end milling cutter
- silent signal
- adj. describes an alarm that annunciates detection to a remote location instead of a local location
- simple latch
- n. a non-deadlocking latch
- simplex key section
- n. a single independent key section which cannot be used in a multiplex key system
- simultaneous retraction
- n. a feature which allows retraction of both the deadbolt and latchbolt in the same operation
- single acting (door)
- n. a door which swings from the latched position in only one direction
- single-acting lever tumbler
- n. a lever tumbler which must be moved a minimum distance to allow travel of a bolt, but cannot be moved so far as to restrict travel of the bolt
- single cylinder
- adj. pertaining to a lock with key operation from only one side
- single-D
- adj. the shape of a cutout for a lock, circular except for a flat section on one side
- single key section
- n. an individual key section which can be used in a multiplex key system
- single step progression
- n. a progression using a one increment difference between bittings of a given position
- six column progression
- n. a process wherein key bittings are obtained by using the cut possibilities in six columns of the key bitting array
- six pin master key
- n. a master key for all combinations obtained by progressing six bitting positions
- SKCS
- abb. standard key coding system
- SKD
- sym. symbol for "single keyed", normally followed by a numerical designation in the standard key coding system; e.g., SKD1, SKD2, etc. It indicates that a cylinder or lock is not master keyed but is part of the keying system
- skeleton key
- n. any non-cylinder key whose bit, blade, and/or post is cut away enough to allow it to enter and turn in locks with different ward arrangements
- slide hammer
- n. a tool made from a rod with a handle, a sliding weight on the rod, and a means of attaching to a part to force its movement relative to other parts
- slider
- n. a tumbler which is normally flat, has a gate and moves with a linear or lateral motion instead of pivoting like a lever tumbler
- slim jim
- n. a narrow strip of spring steel used to bypass the cylinder and unlock vehicle doors
- sling
- n. a cable or layered length of fabric, (usually the latter), with woven loops in both ends, used to lift a safe or vault door with a boom arm lift or forklift.
- slotter
- n. a key machine cutter designed to make cuts with a rectangular shape
- Small Format Interchangeable Core
- n. an IC that replicates the functionality and design popularized by Best
- smartcard
- n. a card conforming to ISO specification 7810 and 7816 which one or more integrated circuits with contacts allowing interface to external equipment
- SMK
- abb. sub-master key
- SMNA
- abb. Safe Manufacturers' National Association
- smokeproof
- adj. referring to an area or opening protected against the penetration of smoke
- smoking (a key)
- v. the action of holding a key or blank over an open flame so that it collects carbon
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- snap bow
- n. 1. a separate bow which can be affixed to a smaller key bow, 2. a bow which retrofits transponder technology to conventional keys for use in access control systems
- software key
- n. data used by software to provide or deny access. See also 'hardware key'
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- SOP
abb. Sequence of Progression
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- spacing
- n. the dimensions from the stop to the center of the first cut and/or to the centers of successive cuts
- spanner wrench
- n. a tool for installing, removing or adjusting a threaded part. The tool is designed to engage one or more holes or depressions which are peripheral or not on-center to the part axis.
- spare tire lock
- n. a lock designed to prevent removal of a vehicle's spare tire
- special application cylinder
- n. any cylinder other than a mortise, rim, key-in-knob or profile cylinder
- spider cam
- n. a rotary mechanism serving to simultaneously control the operation of multiple bolts with a radial arrangement
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- spider lock
- n. a lock that utilizes a special cam as an integral part of the lock to extend or retract the multiple bolts of the lock simultaneously
- spindle
- n. a component which transfers rotary motion from outside a lock or latch case to an inner mechanism
- spline
- n. a groove in a combination lock spindle designed to accept a spline key
- spline key
- n. a device inserted to position the drive cam relative to the spindle in a combination lock
- spline way
- n. a notch in a combination lock drive cam designed to accept a spline key
- split astragal
- n. an astragal constructed of two pieces; each piece being mounted on either door of the pair, and abutting to create a seal
- split bolt
- adj. two separate bolts housed in the same opening in a face of a lock, each operated independently from opposite sides of the door
- split finish
- adj. of or pertaining to a lockset whose finish is different on each side of the door
- split hub
- n. a two-piece hub which can allow motion from one side of a swivel spindle while preventing it from the other side
- split pin master keying
- n. a method of master keying a pin tumbler cylinder by installing master pins into one or more pin chambers
- split spindle
- n. a multi-piece spindle which allows a knob or lever to be installed on only one side of a door
- split wafer
- n. Disc tumblers which are approximately half the width of a full tumbler used in the same lock, and are paired adjacent to one another in the same cut position. Typically used in automotive locks.
- spool pin
- n. a pin with a uniform smaller diameter except at its ends. Typically a top pin used to augment pick resistance but also observed as bottom and master pins.
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- spring cover
- n. a device for sealing one or more pin chambers
- spring hinge
- n. a hinge incorporating a mechanism to apply automatic closing force
- spring latch
- n. a latch operated under spring pressure, having no deadlatching feature
- spring seat
- n. the point at which a spring is anchored, located or attached and at which (from which) it exerts force
- spy-proof dial
- n. a dial and dial ring that complement each other to limit viewable numbers to a range of approximately 10 at a time
- square back
- adj. pertaining to a rim cabinet lock whose mounting flanges and case form the general shape of a square
- square corner latch
- n. a latch with a face whose sides meet at 90 degree angles
- stand alone
- n. a self contained electronic lock device
- standard key coding system
- n. an industry standard and uniform method of designating all keys and/or cylinders in a master key system. The designation automatically indicates the exact function and keying level of each key and/or cylinder in the system, usually without further explanation.
- standard progression format
- n. a systematic method of listing and relating all change key combinations to all master key combinations in a master key system. The listing is divided into segments known as blocks, horizontal groups, vertical groups, rows, and pages, for levels of control.
- standards
- n. a set of specifications relating to materials, finishes, construction, resistance, or strength that typically establish a minimum acceptable value
- staple
- n. the portion of a hasp assembly with the hole or opening to receive a padlock
- step pin
- n. a spool or mushroom pin which has had a portion of its end machined to a smaller diameter than the opposite end. It is typically used as a top pin to improve pick resistance by some manufacturers of high security cylinders.
- stepped tumbler
- n. a special (usually disc) tumbler used in master keying. It has multiple bearing surfaces for blades of different key sections.
- stile
- n. the vertical construction member located on either edge of a door
- stop (of a door)
- n. the projecting portion of a doorframe upon which the door rests when closed
- stop (of a key)
- n. the part of a key from which all cuts are indexed and which determines how far the key enters the keyway
- stop gauge
- n. the part of a key machine that aligns a key blank, a pattern key, or both, so that the blank may be cut correctly
- stop works
- n. a button or toggle mechanism which prevents operation of a knob, lever or thumbpiece in a non-bored lock
- stop works button(s)
- n. a one or two-piece stop works activator
- store door function
- n. a lockset function in which: a) a deadbolt is operated by key from either side and a latch is operated by working trim from either side; or b) a deadlocking latch can be withdrawn by working trim from either side except when both sides are locked by key from either side.
- STPRP
- abb. "Safe Technicians Proficiency Registration Program"; the certification program of SAVTA as administered by ALOA
- straight knife
- n. a bypass tool for manipulating a spring bolt directly behind the cylinder plug
- strike
- n. a bolt receptacle typically mounted in the door jamb or the floor
- strike locator
- n. a tool used to mark the jamb, relative to the bolt of the lock, prior to strike installation
- strike reinforcer
- n. a metal plate mounted behind a strike, using long screws to secure it to the door frame
- strikethru keying
- n. a means of shaping a key bitting by tooling which presses the key in such a way as to leave an indentation on one bitted surface or side of the key, and a protrusion on the other
- stump
- n. the stationary fence(s) in a lever lock
- sub-master key
- n. the master key level immediately below the master key in a system of six or more levels of keying
- substitution code
- n. a code whose individual characters are converted to individual key cuts or combination numbers by means of a reference table
- Suffolk latch
- n. a door latch consisting of a horizontal bar which moves vertically to unlatch on the inside, actuated by a thumb piece on the outside
- supervised security seal
- n. a device which provides visual indication of tampering and includes the ability to be connected into electronic security systems
- surface pull
- n. a handle or grip attached to the surface of a door or drawer
- surreptitious entry
- n. the use of entry or bypass techniques that cannot be detected via disassembly and detailed inspection of lock components
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- sweep
- n. the radiused part of a lever tumbler with which the key makes contact
- sweep speed
- n. the speed at which a closer moves a door from open to the point where latching speed is engaged
- swing clear hinge
- n. a hinge that allows the door to swing far enough away from the jamb to fully clear the opening at 90 degrees open
- switch lock
- n. 1. a lock which incorporates an electrical switch as an integral part of its construction 2. a large padlock designed for use on railroad switches
- swivel spindle
- n. normally a two-piece spindle assembly whose two halves are designed to turn independently
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