Box lock
The box lock is also growing castle or tower castle . A box lock used to be used primarily to secure houses, doors or furniture. It is placed on the inside of a door, e.g. B. front door or apartment door, z. B. placed as a cylinder box lock as an additional door lock. The same applies to box locks on furniture or chests . Instead of a box lock, a mortise lock is mostly used today.
The different types of box lock are: box latch lock , box bolt lock , box latch bolt lock with latch puller and box lock with locking bracket (with additional door gap lock). Use: for inward doors (doors opening inward). Box locks have a fixed or variable backset and can usually be used for right and left rebate doors and flush doors. In Germany they were or are mostly used with door handles (colloquially: handles), while turning knobs are common in France and England. In many applications, box locks have now been replaced by the more elegant-looking mortise locks . These cannot simply be unscrewed when the door is closed, which is a disadvantage of simple box locks.
Box locks, however, have the advantage that only two holes are required in the door (for handle and key) to mount them. They are therefore easier to assemble and can also be attached to doors whose small thickness does not allow the installation of a mortise lock. Box locks are therefore mostly only used on simple, purely functional doors today, e.g. B. in basements or on sheds and gazebos. Replicas of historical box locks are produced for use in the preservation of monuments and for the restoration of old buildings in keeping with the style .
A special form that used to be widespread in Germany is the so-called toggle handle lock - here the handle on the lock side is firmly mounted on the lock and emerges from the top of the lock case, the outer handle is, as usual, inserted into the lock with a square through the door and is inside secured with a nut. This construction prevents the handle on the inside from coming loose and the lock no longer being able to be opened from the inside. Should the outer handle come loose, it can simply be plugged in again as it is provided with a square.
Like many old box locks, these locks usually have a lifting latch , and night bolts or slides are often found, which is an additional bolt that can only be opened from the side on which the lock is located (i.e. usually from the inside).
A box lock is usually installed on the hinge side - i.e. outside the door frame. A locking hook is screwed onto this as a counterpart , also known as a lock shackle, lock latch or lock bolt. If a box lock is mounted on the opposite side, a striking plate is used as a counterpart.
In old buildings with an outside toilet on the mezzanine floor (sometimes also in storage rooms inside the apartment), special box locks, so-called button locks or cabinet locks, were used. You have a trap but not a bolt. Unlike the usual box locks for room doors, the latch is not opened from the outside with a door handle , but with a key, and from the inside by pulling a button. The door does not have to be locked, it is sufficient to pull out the key and take it with you. Most of these locks also have a lever with which the lock can be locked from the inside (i.e. when the toilet is being used). On the other hand, locking from the outside is not possible, as the lock can be opened from the inside at any time by pulling the button - so no toilet user could be locked in, either intentionally or unintentionally.
Individual evidence
- ↑ Dietrich Neumann et al .: Frick / Knöll Baustruktionslehre 2. Springer-Verlag, 2008, ISBN 978-3-834-89486-1 , p. 521 ( limited preview in the Google book search).
- ^ Johann Joseph Ritter von Prechtl : Technological Encyclopedia. J. G. Cotta, 1842, p. 519 ( limited preview in Google book search).