Mood:  cheeky

It is reported that doors and windows hardware, decorative, functional, safety, convenience and comfort should meet the requirements of architectural design. The most primitive form of the windows form from a minor change in the doorway, its role is to withstand the outdoor lighting and bad weather.

Then the window is very rich material, from parchment to the goat, horn sheet to linseed oil on paper - in fact any kind of translucent light through the material can be used for windows. 11th century church with stained-glass construction and a large number of applications, the role of the window as decorative art to render religious mystery.

Before the end of the 17th century, "Lattice Window" by the glass production constraints, are based on the outline of the corresponding lattice fan mounted into small pieces of glass on it. So this time window function is shelter from the storm and to prevent thieves invasion.

Until the late 17th century, with the progress of the times, glass industrial production, the relationship between man and nature changes. It should also be aware that the window is purely functional - not only simple lighting, scenic and shelter role. During this period the British invented the straight edge Shaft hinge window (that is, casement window); Dutch invented the hanging window (ie, pulling down the window), hanging ledge vertical sliding control by a pulley device.