Dead bolt


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dead bolt

[′ded ‚bōlt]
(design engineering)
A lock bolt that is moved directly by the turning of a knob or key, not by spring action.

Dead bolt

A bolt with a square head controlled directly by the key when moved in either direction.

dead bolt

dead bolt
A type of door lock; the bolt, which is square in cross section, is operated by the door key or a turn piece.
References in periodicals archive ?
Adding a dead bolt and upgrading both the dead bolt and lockset to higher grade alternatives can offer more security.
The application for dead bolts includes doors constructed of wood, hollow metal, Herculite, glass with metal frame, and doors where both leaves swing open.
According to Jim Brown, security facilities manager for TRW Space and Defense Sector, "In the past, to protect against unauthorized internal access, defense contractors have used an auxiliary spin-dial locking system, which has an automatic dead bolt and requires a two-handed operation to unlock the dead bolt and twist the doorknob to exit.
Specificatiion: Tamperproof Dead Bolt Lock, Stainless Steel, Antirotation, Unique,
It's a little device that slides under the existing dead bolt, preventing anyone from turning it from the outside, even with a key.
The folks at Simplicikey came up with a motorized dead bolt lock and remote key fob.
Lock and unlock the dead bolt from your computer or phone on a moment's notice, or program it to unlock at preset times.
You can spend hundreds on a fancy "pick-proof" dead bolt for your entry door.
You use your dead bolt every day without giving a thought to maintenance.
For a service door, the solution is to install a good-quality dead bolt and reinforce the doorjamb and hinges to resist a brute-force attack.
These include safety features such as indoor sprinklers, smoke detectors and dead bolt locks.