Window blind

The term blind [ ʒaluzi ] ( feminine; double "jealousy" outdated, even Stabzugladen ) referred to in France first window bars, which were such that they allowed the view to the outside and at the same time prevented from there the view of the interior. The concept of blind explained here from the replication of this grid according to oriental models from the harem in which the householder jealously watched that the apartments of the women were shielded from the outside world. Just as these oriental lattice, the first blind inserts for European shutters were initially not adjustable. It was only on April 14, 1812 announced the carpenter Cochot in Paris for a patent for his invention: one with adjustable and reversible boards ( slats) provided blind that corresponds to the principle still used today.

Today is meant by a blind one variable privacy and sun protection. The external blinds (not to be confused with the shutter) is used as the inner blinds the sight and sun protection but protects effectively against heating in the summer.

The slats of the blind are made of roll-formed aluminum, wood, or - especially in low-cost models - made ​​of PVC. The skull and the drop bar usually consist of sheet metal. For wet areas, there are also non-rusting materials.

The most common slat widths are 16 mm, 25 mm, 35 mm and 50 mm.

In the art of war of the 18th and 19th century Venetian blind also meant smaller attacks on the enemy to trouble him ( "jealousy" ), also called " banter " called.

Operation

Interior blinds

Almost for every situation there is a suitable window blind design nowadays. Thus, besides triangular or trapezoidal designs, blinds in which only individual areas as required can be regulated, blinds that can be moved freely up or down to ensure variations in the open state due to the lamellar spacing a better view outward or blinds, which means back set punched holes, which allow a better protection against light.

There are various mechanisms for operation:

  • With a pull the blind up and let down. The blades are either by turning a turning rod of metal or plastic or with two other cords turned.
  • With an endless cord or an endless chain, with the blind, both up and down left as can also be turned.
  • With a crank, with the blinds lowered both up and as can also be turned.
  • With the aid of an electric motor.

Blinds for indoor use can be mounted in several ways:

  • In the glass block ( the blocks with which the window glass is fixed in the blade frame)
  • In the window recess ( the wall opening in which the window is installed)
  • On the window sash
  • Before the window recess ( on the wall or the ceiling)

For mounting on window there specially for PVC windows special clamp carrier, so do not have to drill into the window.

In order to prevent the blind protrudes from the window with tilted bottom of the window, blinds are fitted with so-called shuttle protection. The pendulum consists of a fuse wire or a nylon thread that is threaded from the blind head goes out and on the side through each slat. Below the latter is fixed with a bracket or other mounting at the window.

Special built-in blinds are mounted directly on the glass to the window frame. They have a pulled up head profile and a shuttle protection. They are actuated by a ball chain or simply with a handle at the bottom slat bar.

For some time inside blinds are offered in which the blind between the panes ( SDR ) of the insulating glass pane is where it is protected from contamination. Such blinds are operated by an electric motor, which is also integrated in the insulating glass, or a continuous outer crank which is connected via a hexagonal rod of the Venetian blind.

Exterior Shutters

Outdoor blinds, venetian blinds are called, always delivered with shuttle protection. Outdoor blinds for heavy duty have extra thick, beaded slats. Since the venetian blind is exposed to higher loads due to wind and weather as a blind, it is common as rail or rope out. For protection they are automatically at higher wind load retracted ( wind sensor ).

Alternatives

  • Roller blind
  • Plisseeanlage
  • Intelligent glass
La Jalousie Jacob Gade Aluminium
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