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Numerous devices exist to serve specific purposes related to how a door should (or should not) be used. See: Door chain - A device to secure door opening; Door closer – Mechanical or electromagnetic device to close an open door (in the event of a fire) [3] Door opener - Automatic door opening device activated by motion sensors or pressure pads
A door closer is a mechanical device that regulates the speed and action of a door’s swing. [1] Manual closers store the force used to open the door in some type of spring and reuse it to close the door. Automatic types use electricity to regulate door swing behavior. Door closers can be linked to a building's fire and security alarm systems. [2]
The first modern direct-pull electromagnetic lock was designed by Sumner "Irving" Saphirstein in 1969 [6] [7] [8] for initial installation on doors at the Montreal Forum. [9] Fire concerns by local authorities in locking the doors at the Forum prompted management to find a locking solution that would be safe during a fire incident.
The doors form a 2.5 m (8 ft 2 in) high glass and steel screen the entire length of the platform. The door opening is 2.1 m (6 ft 11 in) wide, and the system includes integrated passenger information and digital advertising screens.
Wall-mounted electromagnetic door holder securing a door in the open position. An electromagnetic door holder (electromagnetic door holder and release or hold-open device, sometimes informally called a mag hold open or electric doorstop) is a simple electromechanical mechanism which can be used to hold a fire door or security door open until given a signal to release.
Storm door, Japan. A storm door is a type of door that is installed in front of an exterior access door to protect it from bad weather and allow ventilation.Storm doors generally have interchangeable glass panels and window screen panels to provide visibility and prevent flying insects from entering the home.
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