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The term "warded lock" refers to the lock mechanism, while the term "mortise lock" refers to the bolt location. Warded locks contain a series of static obstructions, or wards, within the lock box; only a key with cutouts to match the obstructions will be able to turn freely in the lock and open the latch. [4]
A common example is the traditional sash window lock, where the cam is mounted to the top of the lower sash, and the follower is the hook on the upper sash. In this application, the cam is used to provide a mechanical advantage in forcing the window shut, and also provides a self-locking action, like some worm gears, due to friction.
The term "sash windows" is used interchangeably with the term "box sash windows" in the United Kingdom, and frequently used to describe the same thing. Historically box sash windows are heavier and more stately in nature than modern sash windows, but both terms are used within the industry when referring to the same type of window. [citation ...
Variants of casement windows are still the norm in many European countries. They are sometimes opened with a crank, lever, or cam handle, which is placed around hand height or at the bottom and serves as a window lock. [2] A crank, stay, or friction hinge is necessary when the window opens outward, to hold the window in position despite wind.
The openings on the front have segmental heads, the doorway has a fanlight, and most of the windows are horizontally-sliding sashes. At the rear is a two-storey bow containing sash windows with rusticated wedge lintels with double keystones. [6] II: Lock Keeper's Cottage and outbuilding, Sandiacre Lock
Before this the internal plan and function of the rooms can generally not be deduced from the outside. To open these large windows the sash window, already developed by the 1670s, became very widespread. [16] Corridor plans became universal inside larger houses. [17]
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