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Historical Box locks - Information

Surface-mounted locks are fitted onto a door and their mechanism is visible on the outside. Surface-mounted locks almost exclusively have toggle handles and a lifting latch. They are manufactured as replicas and are usually only required when historic buildings are being converted into museums.

Mortise locks conceal their mechanism with an angled cover plate and are inserted into the side of the door. The short side of the plate forms the lock faceplate.

Box locks are nothing more than surface-mounted locks whose mechanism is protected by a box. They are the locks commonly used in the 18th and 19th centuries.

Examples of Historical Box locks

 
 
Box locks are divided into three types:

Toggle latch locks:
In these locks, a latch protrudes from the upper edge of the box. The handle is used to lift the latch out of the strike plate. The other side has a handle with a pin that is inserted through the lock nut.

Mortise locks:
Like lever locks, they have a lifting latch. The handles lie flush against the nut on the lock side.

Locks with a shooting latch:
They differ from the previous type only in that the latch protrudes into the strike plate. The locks described above are used because doors used to be 20-32 cm thick and the mortice locks commonly used today cannot be fitted into such doors.

We also refurbish old box locks and adapt them for use on doors such as church entrances, allowing profile cylinders to be installed. Decorative strips can be added as requested or according to a drawing. However, lock cases can only be enlarged in iron if the backset is retained. The backset refers to the distance between the faceplate and the centre of the handle spindle.

Surfaces and materials

An overview of the abbreviations used and the available materials and surface treatments for the fittings can be found on the corresponding subpage:

Table: Surfaces | Abbreviations used

Fe: Eisen's raw
Fea: Old iron seasoned with oil
FeZis: Black galvanised iron
FeBl: covered with sheet iron, raw
FeBla: covered with sheet iron, oil-fired
FeBlZis: covered with sheet iron, black galvanised
MspBl: covered with brass sheet, polished
MsaBl: covered with brass sheet, old
The available materials and surface treatments for the fittings can be seen from the abbreviations in the table above (drop-down button).