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Glossary of Terms

Occupancy Type

(adj.) The use to which an area of a building is put with reference to the prevailing life safety or building code.
Source: Lock Industry Standards and Training (LIST) Council

Odometer Method

(n.) A means of progressing key bittings using a progression sequence of right to left.
Source: Lock Industry Standards and Training (LIST) Council

Oe

(abb.) Oersted
Source: Lock Industry Standards and Training (LIST) Council

Oersted

(n.) A unit of magnetic field strength which is commonly used in the magnetic recording industry.
Source: Lock Industry Standards and Training (LIST) Council

Offset Cam

(n.) A cam which is bent to have its ends in different planes.
Source: Lock Industry Standards and Training (LIST) Council

Oil Cup

(n.) A receptacle for lubricant on a machine.
Source: Lock Industry Standards and Training (LIST) Council

One Bitted

(adj.) Of or pertaining to a cylinder which is or is to be combinated to keys cut to the manufacturer's reference number one bitting.
Source: Lock Industry Standards and Training (LIST) Council

One Column Progression

(n.) A process wherein key bittings are obtained by using the cut possibilities in one column of the key bitting array.
Source: Lock Industry Standards and Training (LIST) Council

One Pin Master Key

(n.) A master key for all combinations obtained by progressing only one bitting position.
Source: Lock Industry Standards and Training (LIST) Council

One Shot

(adj.) Of or pertaining to a wire run that has an unobstructed line of sight.
Source: Lock Industry Standards and Training (LIST) Council

One-Way Deadbolt

(n.) A deadbolt operable from only one side of a door.
Source: Lock Industry Standards and Training (LIST) Council

Open Back Strike

(n.) A strike, typically used on double door applications, that has an unenclosed opening opposite the lip edge.
Source: Lock Industry Standards and Training (LIST) Council

Open Face Dial

(n.) A combination lock actuator designed to have all the numbers visible at once.
Source: Lock Industry Standards and Training (LIST) Council

Open Gated

(adj.) Pertaining to a lever tumbler whose gate is in the edge of the tumbler.
Source: Lock Industry Standards and Training (LIST) Council

Open Loop

(n.) A detection circuit where continuity between branches will result in a reportable condition.
Source: Lock Industry Standards and Training (LIST) Council

Opening Index

(n.) The index or mark to which a combination is dialed in order to effect an opening.
Source: Lock Industry Standards and Training (LIST) Council

Operating Key

(n.) Any key which will properly operate a lock or cylinder to lock or unlock the lock mechanism and is not a control key or reset key.
Source: Lock Industry Standards and Training (LIST) Council

Operating Shear Line

(n.) Any shear line which allows normal operation of a cylinder or lock.
Source: Lock Industry Standards and Training (LIST) Council

Original Key Blank

(n.) A key blank supplied by the lock manufacturer to fit that manufacturer's specific product.
Source: Lock Industry Standards and Training (LIST) Council

Out of Time

(adj.) Of or pertaining to a condition where a mechanical part is misoriented and cannot function correctly.
Source: Lock Industry Standards and Training (LIST) Council

Overhead Concealed Closer

(n.) A closer designed for installation out of view in the door header area.
Source: Lock Industry Standards and Training (LIST) Council

Overhead Stop

(n.) A door stop which contacts the door near the top.
Source: Lock Industry Standards and Training (LIST) Council

Override Code

(n.) In an electronic lock, a factory-set or user-set combination that will always open the lock.
Source: Lock Industry Standards and Training (LIST) Council

Override Combination

(n.) In certain locks with a user changeable combination, a second combination which allows access at all times. It is usually factory set and may not be field changeable.
Source: Lock Industry Standards and Training (LIST) Council