Stay Hinges and Friction Hinges explained

A Friction Hinge consists of two plates or components connected by a pivot point. Inside the hinge mechanism, there is a torque element, often a small clutch or a combination of springs and friction materials, which generates resistance to movement. The torque element can be adjusted to control the amount of friction or resistance applied to the hinge.

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When a force is applied to the hinge, the resistance provided by the friction mechanism allows the hinge to hold its position at any angle within its range of motion. It eliminates the need for additional mechanisms, such as locks or support brackets, to keep the hinge in place. The friction hinge provides a smooth and stable operation, enabling users to position or adjust the connected parts easily while maintaining the desired angle.

The design and construction of friction hinges can vary depending on the specific application requirements. Some friction hinges allow bidirectional rotation, while others have limitations on the range of motion. They can be found in various sizes, materials, and configurations to accommodate different loads, environments, and aesthetic preferences.

Overall, friction hinges offer a reliable and versatile solution for controlled movement in numerous applications, such as windows, providing stability, adjustability, and a satisfying user experience.

Window that is attached to its frame by one or more hinges

A casement window is a window that is attached to its frame by one or more hinges at the side.[1] They are used singly or in pairs within a common frame, in which case they are hinged on the outside. Casement windows are often held open using a casement stay. Windows hinged at the top are referred to as awning windows, and ones hinged at the bottom are called hoppers.

Overview

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Throughout Britain and Ireland, casement windows were common before the sash window was introduced. They were usually metal with leaded glass, which refers to glass panes held in place with strips of lead called cames (leaded glass should not be confused with lead glass, which refers to the manufacture of the glass itself).

These casement windows usually were hinged on the side, and opened inward.

By the start of the Victorian era, opening casements and frames were constructed from timber in their entirety. The windows were covered by functional exterior shutters, which opened outward. Variants of casement windows are still the norm in many European countries.

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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.

Often, the glass panes are set in a rabbeted frame and sealed with beveled putty or glazing compound to secure the glass.

The hinging of casement windows is referred to using the following abbreviations: FCL refers to a left-handed window, where the hinges are located on the left and the locking mechanism is on the right. FCR is a right-handed window with the hinges on the right and the locking mechanism on the left. These definitions apply to a window when looking at it from the exterior ("from curb" or FC). In some countries architectural diagrams of casement windows show a dashed triangle with the hinged side identified by the point of the triangle (e.g. USA), while in others they point to the lever, showing a simplified perspective of the opened window (e.g. Hungary, Germany). Furthermore in some countries (e.g. Hungary, Germany) diagrams also make distinction between windows opening inwards (dashed line) or outwards (solid line). FCL windows feature a triangle pointing to the left; FCR windows have a triangle pointing to the right.

Energy efficiency and natural ventilation

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Casement windows, including awning and hopper types, "generally have lower air leakage rates than sliding windows because the sash closes by pressing against the frame."[3]

Casement windows are also excellent for natural ventilation strategies, especially in hot climates. Casements allow more control of ventilation than flush-opening windows. They can be hinged to open outward and angled in order to direct breezes into the building.[4]

Notes

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