5 lever lock

5 lever lock

The 5 lever lock is a type of lock often required for home insurance and are generally recommended by the police for home security. There are various 'grades' but the current British Standard (BS3621:2004) is usually required for insurance purposes. The lever mechanism is really only seen in the UK and some parts of Scandinavia, and locks using this form of mechanism are frequently referred to as 'Chubb locks' although there are a great many manufacturers. The new BS 3621 calls for a bolt throw of 20mm rather than the 14mm of the old British Standard. In an article on "The Ancient Art of the Locksmith" [http://www.buildingconservation.com/articles/locks/locks.htm] Valerie Olifent notes that "The doors of many historic churches still carry an old wooden lock although often you find that a modern 5-lever mortice lock has been installed alongside it to meet insurance requirements."

The lever

A flat, non ferrous metal, shaped double acting movable ‘detainer’ in a lock. Usually pivoted, but sometimes slide. The levers in a lock have to be moved by the key to operate the lock. The belly of the lever is cut away to various depths to provide different combinations. A lever will have pockets and gates through which the bolt stump moves during unlocking.

References

* http://www.met.police.uk/crimeprevention/garden2.htm
* http://www.lincs.police.uk/index.asp?docID=98


Wikimedia Foundation. 2010.

Игры ⚽ Поможем написать реферат

Look at other dictionaries:

  • lever lock — See selector lever lock …   Dictionary of automotive terms

  • lever lock — noun a lock whose tumblers are levers that must be raised to a given position so that the bolt can move • Hypernyms: ↑lock • Part Meronyms: ↑lever, ↑lever tumbler …   Useful english dictionary

  • selector lever lock — A lock the selector lever in Neutral or Park unless the driver depresses the brake pedal …   Dictionary of automotive terms

  • lock — lock1 lockless, adj. /lok/, n. 1. a device for securing a door, gate, lid, drawer, or the like in position when closed, consisting of a bolt or system of bolts propelled and withdrawn by a mechanism operated by a key, dial, etc. 2. a contrivance… …   Universalium

  • Lever tumbler lock — A lever tumbler lock is a type of lock that uses a set of levers to prevent the bolt from moving in the lock. In the simplest of these, lifting the tumbler above a certain height will allow the bolt to slide past. Double acting Lever tumbler… …   Wikipedia

  • Lock (device) — A lock is a mechanical fastening device which may be used on a door, vehicle, or container, restricting access to the area or property enclosed. Commonly, it can be released by using a key or combination.History of locksSecuring one s property… …   Wikipedia

  • lever tumbler — noun a flat metal tumbler in a lever lock • Syn: ↑lever • Hypernyms: ↑tumbler • Part Holonyms: ↑lever lock * * * noun : an internal member of a lock usually of flat sheet metal that is moved by a key to operate the bolt distinguished from …   Useful english dictionary

  • lock — [1] A fastening device which closes and opens by the use of a key. [2] A steering term describing the amount by which the wheels of a vehicle are able to turn. See steering lock and lock to lock. [3] An obstruction such as a air lock or vapor… …   Dictionary of automotive terms

  • LOCK-OUT — LOCK OU Fermeture temporaire de l’entreprise décidée par l’employeur en réponse à un conflit collectif du travail (grève ou menace de grève). Le but du chef d’entreprise est en général d’éviter d’assumer la charge du fonctionnement d’une… …   Encyclopédie Universelle

  • lever — Ⅰ. lever UK US /ˈliːvər/ US  /ˈlevər/ noun [C] ► a bar or handle which moves around a fixed point, so that one end of it can be pushed or pulled in order to control a machine or move a heavy object: »Lower the lever to lock the machine into place …   Financial and business terms

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”