Electric Locks On The Go

Lilian — Fri, 07 Aug 2009 07:52:48 +0000

Lock, is really a special thing but used almost everywhere. We can’t imagine even a day without it. However, no one can exactly tell when it first came into human being’s mind and then never have been absent. Maybe it was a contemporary with private ownership. It came out of the sense of security .

Generally speaking, a lock is a mechanical fastening device which may be used on a door, vehicle, or container, restricting access to the area or enclosed property. Locks are always come in a variety of forms due to the unstoppable bout between lock and picklock. Bicycle lock, cam lock, chamber lock , child safety lock, combination lock, cruciform (or Zeiss) lock, time lock, turner lock, wafer tumbler lock, warded lock and so on is never occur to be found rare. What I want to talk this time is electric locks, which are widely used now.

An electric lock is a locking device which operates by means of electric current. Electric locks are sometimes stand-alone with an electronic control assembly mounted directly to the lock. More often electric locks are connected to an access control system.

The advantages of an electric lock connected to an access control system include: key control, where keys can be added and removed without re-keying the lock cylinder; fine access control, where time and place are factors; and transaction logging, where activity is recorded.

Electric locks come in many forms. The most basic is a magnetic lock (commonly called a mag lock). A large electro-magnet is mounted on the door frame and a corresponding armature is mounted on the door. When the magnet is powered and the door is closed, the armature is held fast to the magnet. Mag locks are simple to install and are very attack resistant. But mag locks are also problematic. Improperly installed or maintained mag locks have fallen on people. Also there is no mechanical free egress. In other words, one must unlock the mag lock to both enter and leave. This has caused fire marshals to impose strict codes on the use of mag locks and the access control practice in general. Other problems include a lag time in releasing as the collapsing magnetic field is not instantaneous. This lag time can cause a user to walk into the door. Finally, mag locks by design fail unlocked, that is if power is removed they unlock. This could be a problem where security is a prime concern.

Building Hardware Resource » electric lock

Electric Locks On The Go