Cylinder lock

A lock cylinder which is operable by a key part of the cylinder lock, and usually consists of a housing and a rotatable cylinder core. There are different designs such as profile cylinder, round cylinder, oval cylinder, etc. Half cylinders can be closed from one side only, double cylinder of the two; Knob cylinders are to be operated on one side with a key, on the other with a permanently mounted rotary knob.

The patent was in 1924 by Sylvester Woehrle, an employee of Hahn AG for optics and mechanics in Ihringshausen near Kassel, filed. The Hahn AG was acquired shortly thereafter by the Goerz AG Berlin and this was in 1927/28 in the consortium Zeiss Ikon on. Under the brand name Zeiss Ikon therefore the lock cylinder has been known since the late 1920s, around the world.

The lock cylinder DIN EN 1303 Standardized " Cylinders for locks " and DIN 18252 " profile cylinder for door locks ."

The lock cylinder is the core of the security of lock and door nowadays. The key transmits mechanical (now also electronic ) codes in the form of cuts (and / or dimples ) and its profile.

In this lock cylinder codes are scanned. True the profile of the key and the profile of the lock cylinder match, the key can be inserted. Also fit the cuts of the key, the pins arranged in the lock cylinder so that the core can be turned - it is (on ) closed.

With key inserted

Unlocked

With the wrong key

Burglary

Lock cylinder shall be protected against breaking, drilling, pulling, and other attacks. Against this overcoming methods offer lock cylinder with drill protection, nuclear and drag lock Sts highly resistance.

By mounting a burglar-proof door plaque or fitting with integrated cylinder protection a lock cylinder can also be protected against this attack.

Unlocking security

When unlocking security is defined as the resistance of a lock cylinder against attempts at opening offers with locking tools. Every attempt to overcome the lock cylinder by opening is opposite from the manufacturers a number of technical measures, such as barbell pins, paracentric key profiles and additional locking elements.

A fairly new development are mechatronic locking cylinders which have a battery and electronics plugged in "mechanical" key. The key has an electrical connection to the castle and it is submitted, The enabling of the castle a code.

Emergency and danger function

Conventional lock cylinder can not be rotated when inserted from the other side of a key in a rotated position. Therefore, special lock cylinder be " lockable on both sides " sold under names such as " with emergency and danger function", " hazardous facility " or that avoid both accidental lockout as ensure the emergency opening in the helpless people in the apartment. It is sometimes also possible to limit the risk of opening a special emergency key.