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IC

abb. interchangeable core

ICBO

abb. International Conference of Building Officials

ignition key release

n. a button or other actuator which must be pushed before a vehicle's ignition key may be turned to the withdrawal position

ignition lock

n. the lock assembly associated with a vehicle's engine on-off switch and starter

ignition puller

n. a tool for removing an ignition cylinder by pulling outward on it

ILA

abb. Institutional Locksmiths Association

ILCP

abb. "Institutional Locksmith Certification Program"; a locksmith certification program administered by ILA

 

impression

n. 1. the mark made by a tumbler on its key cut 2. v. to fit a key by the impression technique

 

impression technique

n. a means of fitting a key directly to a locked cylinder by manipulating a blank in the keyway and cutting the blank where the tumblers have made marks

 

impressioning tool

n. 1. a tool designed to hold a key blank while making a key by the impression method, 2. a tool which fits into a keyway and holds a material that accepts impression marks easily

 

inactive case

n. the exit device case mounted on the stile opposite the lock stile

 

inactive door

n. the door of a pair, which is secondary in usage and is normally locked by surface or flush bolts

 

incidental master key

n. a key cut to an unplanned shear line created when the cylinder is combinated to the top master key and a change key

 

increment

n. a usually uniform increase or decrease in the successive depths of a key cut which must be matched by a corresponding change in the tumblers

 

independent custody

1. n. a function of a locking mechanism that allows separate access by either of two different people, each with a different type method of opening and closing the lock, 2. adj. pertaining to such a function

 

index (of a combination lock dial)

n. the mark outside the dial ring of a combination lock used as a reference point

 

indicator

n. a device which provides visual evidence that a deadbolt is extended or that a lock is in the shut out mode

 

individual key

n. an operating key for a lock or cylinder which is not part of a keying system, see also "change key" #1

 

inner ring

n. that part of a mesh change or key change combination wheel that makes direct contact with the wheel post

 

integral lockset

n. a lockset that combines two or more different mounting or operational methods, typically key-in-knob and mortise

 

interchangeable core

n. a key removable core which can be used in all or most of the core manufacturer's product line. No tools (other than the control key) are required for removal of the core.

 

interconnected lockset

n. a lockset whose trim provides a means of simultaneous retraction of two or more bolts which may also be operated independently

 

interlocking bolt

n. a bolt which interlocks with its strike when fully engaged

 

interlocking pin tumbler

n. a type of pin tumbler which is designed to be linked together with all other tumblers in its chamber when the cylinder plug is in the locked position

 

intermittent duty

adj. of or pertaining to an electric strike or lock not designed to be energized for extended periods of time

 

internal relocking device

n. a device inside a safe lock case that prevents the lock bolt from being retracted after attack

 

IP

abb. internet protocol

 

IR

abb. Infrared

 

IRD

abb. internal relocking device