-R-

rabbeted door

n. a door having and edge contoured with an offset creating two surfaces which form an overlap at the abutting edge

 

rabbeted lock

n. a lock with a face or front which is specially formed to use in a rabbeted door

 

radio frequency identification

n. an identification technology using short range radio frequency transmission

 

radiused blade bottom

n. the bottom of a key blade which has been radiused to conform to the curvature of the cylinder plug it is designed to enter

 

rail

n. the horizontal construction member located on the top and bottom of a door

 

rake (rake & hang)

n. a picking technique that attempts to use quick withdrawal of the pick to set the tumblers

 

random master keying

n. any undesirable process used to master key which uses unrelated keys to create a system

 

randomized order

n. 1. an arrangement of cut depths in a KBA without numerical order, 2. an arrangement or list, such as a bitting list, in which the information is sorted in no easily discernible pattern

 

rap

v. 1. to unlock a plug from its shell by striking sharp blows to the spring side of the cylinder while applying tension to the plug 2. to unlock a padlock shackle from its case by striking sharp blows to the sides in order to disengage the locking dogs

 

ratchet lock

n. any lock which incorporates a ratchet device allowing locking in more than one position

 

rated

adj. of or pertaining to a product's compliance with one or more recognized standards such as UL.

 

read

v. to decode a lock combination visually without disassembly of the lock or cylinder

 

read key

n. a key which allows access to the sales and/or customer data on certain types of cash control equipment (e.g., cash register)

 

reader

n. a device used in an access control system to interrogate an electronic, magnetic or optical type of credential

 

rear drive

adj. of or pertaining to a combination lock with the wheel pack located between the dial and the drive cam

 

recombinate

v. to change the combination of a lock, cylinder or key

 

record safe

n. a safe whose primary purpose is to preserve paper documents against fire

 

recore

v. to rekey by installing a different core

 

redundant button

n. a secondary release switch for an egress device to allow unlocking in case of a malfunction of the primary release switch

 

reference position

n. usually a numerical designation for a tumbler position within a lock or a cut position on a key, typically counted from the stop

 

register groove

n. the reference point on the key blade from which some manufacturers index the bitting depths

 

register number

n. 1. a reference number, typically assigned by the lock manufacturer to an entire master key system 2. a blind code assigned by some lock manufacturers to higher level keys in a master key system

 

rekey

v. to change the existing combination of a cylinder or lock

 

relock trigger

n. the part of a safe relocking device which causes the mechanism to activate

 

relocking device

n. any device intended to prevent normal opening of a safe as a result of an attack, two types are typically used, internal and external 

 

remote release

n. a mechanism for permitting the unlocking of any lock device at a distance from the device

 

removable core

n. one whose design limits its installation to one or more specific types of housing or shell from a given manufacturer

 

removable cylinder

n. a cylinder which can be removed from a locking device by a key and/or tool

 

removable dial

n. a combination lock actuator that may be taken from the lock when not in use

 

removable shackle

adj. referring to a type of padlock which is unlocked by removing the shackle from the case

 

removal key

n. the part of a two-piece key which is used to remove its counterpart from a keyway, see also "control key" #1 & #3, see also "construction breakout key"

 

renter's key

n. a key which must be used together with a guard key, prep key or electronic release to unlock a safe deposit lock. It is usually different for every unit within an installation.

 

repin

v. to replace pin tumblers, with or without changing the existing combination

 

reset code

n. in an electronic lock, a factory-set or user-set code or combination that will restore all factory default settings except the current reset code and the audit trail

 

reset key

n. 1. a key used to set some types of cylinders to a new combination. Many of these cylinders require the additional use of tools and/or the new operating key to establish the new combination. 2. a key which allows the tabulations on various types of cash control equipment (e.g., cash registers) to be cleared from the records of the equipment

 

resettable tumbler

n. a tumbler which can have its reference position altered by reorientation within the cylinder without disassembly

 

resistor pellet

n. the encapsulated resistor with exposed contacts installed in a key, such as that for VATS

 

restraint

n. a device designed with a shackle that restricts the movement or actions of a person, such as handcuffs

 

restricted

adj. 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

 

retainer

n. a component which is clipped, staked, or driven in place to maintain the working relationship of other components

 

retainer pin

n. 1. a component seated on a spring, in the end of a plug, that interacts with a retainer cap to keep it in place. 2. Any non-threaded rod that maintains the relationship of two or more different parts.

 

retrofit lever

n. a lever handle designed to replace the knob of a lockset

 

return

n. 1. the extension of a cam which bends back towards the mounting surface and the measurement of the remaining distance from the mounting surface to the end of the cam, 2. the distance from a door face to the tip end of a lever handle

 

reveal

n. the distance measured from the trim surface of the jamb to the leading face of the door on the stop side when closed

 

reverse bevel

adj. pertaining to the bevel of a door which swings towards the outside

 

reverse keyway

n. a keyway shape that is a mirror image of another

 

reverse strike

n. a strike used for rim mounted hardware used on reverse bevel doors

 

reversible

adj. pertaining to hardware that is manufactured in a way, which allows field assembly or adjustment to accommodate installation on doors with different orientations

 

reversible key

n. a usually symmetrical key which may be inserted either way up to operate a lock

 

RF

abb. Radio Frequency

 

RFID

abb. radio frequency identification

 

RH

abb. right-hand

 

RHR

abb. (right hand reverse bevel)

 

RHVD

abb. right hand vertical down

 

RHVU

abb. right hand vertical up

 

right hand (man door)

adj. pertaining to an inward swinging door with hinges on the right side, using the outside of the door as reference

 

right hand reverse bevel (door)

adj. pertaining to a right handed door which swings outward

 

right track

n. the farthest right bitting surface of a sidewinder key, as the wider surface of the blade is viewed with the bow of the key nearest the observer

 

rim cylinder

n. a cylinder typically used with surface applied locks and attached with a back plate and machine screws. It has a tailpiece to actuate the lock mechanism

 

rim exit device

n. an exit device mounted on the door surface

 

rim lock

n. a lock or latch typically mounted on the surface of a door or drawer

 

rim vertical rod exit device

n. a vertical rod exit device mounted on the door surface

 

ring key

n. a key attached to a ring to be worn on the finger

 

RL

abb. The title "Registered Locksmith" as awarded by ALOA

 

RLD

abb. relocking device

 

RLT

abb. relock trigger

 

RM

abb. row master key

 

root depth

n. the dimension from the bottom of a cut on a key to the bottom of the blade

 

rose

n. a usually circular escutcheon

 

rotary file cutter

n. a key machine cutter with very fine teeth which are formed by stamping, such as a file

 

rotary disc tumbler

n. a circular tumbler with one or more gates. Rotation of the proper key aligns the tumbler gates at a sidebar, fence or shackle slot.

 

rotating constant

n. one or more cut(s) 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

n. 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 cut(s) is moved to different locations in a logical sequence until each possible planned position has been used.

 

round back

adj. pertaining to a rim cabinet lock whose mounting flanges and case form the general shape of a circle when viewed from the back

 

round cornered latch

adj. of or pertaining to a latch mounting plate with radiused corners

 

rounded front

n. a lock front or face plate that is radiused to match the edge of the door

 

row master key

n. the one-pin master key for all combinations listed on the same line across a page in the standard progression format

 

RS-485

std. an Electronics Industry Association (EIA) standard for serial multipoint communications commonly used in online access control systems for distances up to 4000 feet

 

RST

abb. the title "Registered Safe Technician" as awarded by NSO

This listing of the Locksmith Dictionary is courtesy of