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Automatic mechanisms are also used for security purposes, being controlled by a keypad, swipe card, or biometrically controlled electromagnetic device. [citation needed] The latter include retina scanners, fingerprint readers, and voice recognition technologies. [28] Electric door closers may also be hooked to a building’s fire alarm system.
A casement stay is a metal bar used to hold a casement window in a specific open or closed position. [1] Metal windows will normally have the stay included at the time of manufacture, while wooden windows will have them added after fitting. [2] Different kinds of casement stay include peg type, telescopic and friction
The automatic door used a mat actuator. In 1960, they co-founded Horton Automatics Inc and placed the first commercial automatic sliding door on the market. [5] With the invention of the Gunn diode, microwave motion detectors became common in automatic doors in the 1970s. [6] [7] In 1980, the first automatic door using an infrared sensor was ...
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 ...
Crash bar doors in a school, with upper vertical rod latches. A crash bar (also known as a panic exit device, panic bar, or bump bar) [1] [2] is a type of door opening mechanism which allows users to open a door by pushing a bar.
A matching pair of these doors is called a French window, as it resembles a door-height casement window. When a pair of French doors is used as a French window, the application does not generally include a central mullion (as do some casement window pairs), thus allowing a wider unobstructed opening. The frame typically requires a weather strip ...