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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
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- impression
- n. 1. the mark made by a tumbler on its key cut 2. v. to fit a key by the impression technique
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- 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
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- 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
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- inactive case
- n. the exit device case mounted on the stile opposite the lock stile
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- inactive door
- n. the door of a pair, which is secondary in usage and is normally locked by surface or flush bolts
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- 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
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- 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
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- 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
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- index (of a combination lock dial)
- n. the mark outside the dial ring of a combination lock used as a reference point
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- indicator
- n. a device which provides visual evidence that a deadbolt is extended or that a lock is in the shut out mode
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- individual key
- n. an operating key for a lock or cylinder which is not part of a keying system, see also "change key" #1
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- inner ring
- n. that part of a mesh change or key change combination wheel that makes direct contact with the wheel post
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- integral lockset
- n. a lockset that combines two or more different mounting or operational methods, typically key-in-knob and mortise
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- 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.
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- interconnected lockset
- n. a lockset whose trim provides a means of simultaneous retraction of two or more bolts which may also be operated independently
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- interlocking bolt
- n. a bolt which interlocks with its strike when fully engaged
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- 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
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- intermittent duty
- adj. of or pertaining to an electric strike or lock not designed to be energized for extended periods of time
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- internal relocking device
- n. a device inside a safe lock case that prevents the lock bolt from being retracted after attack
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- IP
- abb. internet protocol
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- IR
- abb. Infrared
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- IRD
- abb. internal relocking device
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