Locksmith Glossary - E


Source: Lock Industry Standards and Training (LIST) Council

EAC
(abb.) Electronic Access Control

Edge Bore
(n.) A hole drilled into the edge of a door where a bored or interconnected lockset is to be installed.

Edge Pull
(n.) A handle mounted on, or in, the edge of a sliding or pocket door for gripping to pull the door closed.

Educational Occupancy
(n.) Those buildings or areas which are designated as places for education purposes according to life safety or building codes.

Effective Plug Diameter
(n.) The dimension obtained by adding the root depth of a key cut to the length of its corresponding bottom pin which establishes a perfect shear line. This will not necessarily be the same as the actual plug diameter.

Effective Throw
(n.) The distance a deadlatch remains projected when the guard bolt has been engaged and end pressure is applied to the latch.

EIA
(abb.) Electronics Industry Association

Ejector Hole
(n.) A hole found on the bottom of certain interchangeable cores under each pin chamber. It provides a path for the ejector pin.

Ejector Pin
(n.) A tool used to drive all the elements of a pin chamber out of certain interchangeable cores.

Elbow Catch
(n.) An "L" shaped latching mechanism typically mounted to the inside of the inactive leaf of a pair of cabinet doors.

Electric Strike
(n.) An electro-mechanical strike, which secures or releases the latch via applied current.

Electrified Lockset
(n.) A lock which is controlled electrically.

Electronic Access Control
(n.) Access control that uses electricity.

Emergency Code
(n.) In an electronic lock, a factory-set or user-set code or combination that will open the lock a predetermined number of times.

Emergency Key
(n.) The key which operates a privacy function lockset.

Emergency Master Key
(n.) A special master key which usually operates all guestroom locks in a hotel master key system at all times, even in the shut out mode. This key may also act as a shut out key.

EMK
(abb.) Emergency Master Key

End Cap
(n.) The cover typically used on the hinge side edge of many touch bar exit devices.

End Ward
(n.) A ward which prevents complete insertion and/or rotation of an incorrect key by forming an obstruction to the end of the key.

End Ward Cut
(n.) Any cut made into a key to bypass an end ward.

ENG
(abb.) Engineer's Key

Engineer's Key
(n.) A selective master key which is used by maintenance personnel to operate many locks under different master keys in a system of three or more levels of keying.

Entrapment Key
(n.) A key designed to be captured by a cylinder after insertion.

Entry/Exit Delay
(n.) 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.

ERD
(abb.) External Relocking Device

Escutcheon
(n.) A surface mounted trim which enhances the appearance and/or security of a lock installation.

Espagnolette
(n.) A top and bottom locking system with hooks at either end which rotate to draw a door or window fully closed.

Exit Alarm
(n.) An annunciator that signals the opening of an exit door.

Exit Device
(n.) A door lock/latch mechanism which releases in the direction of exit travel via a bar or panel extending across the major width of the door.

Exit Door
(n.) 1. A door which has no provision for ingress.
(n.) 2. A door which fills some or all the code requirement for safe egress of the occupant load from a building or portion of a building.

Exit Only
(adj.) 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.

Exit Travel, Direction Of
(n.) The way occupants are expected to move to get out of a building or a portion of a building.

Expansion Specification
(n.) A requirement for bittings to be planned beyond the immediate needs of a keying system.

Extended Lip Strike
(n.) A strike with a (usually curved) leading edge that protrudes to or beyond the edge of the jamb.

Extension Flush Bolt
(n.) A flush bolt that has a separate escutcheon and faceplate.

Extension Link
(n.) A device which is used to extend the backset of a spring latch or dead latch.

External Relocking Device
(n.) A device outside the lock case that prevents the safe door from being opened after attack, two types are typically used, active and passive.

Extractor Key
(n.) A tool which normally removes a portion of a two-piece key or blocking device from a keyway.
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